WO2017115872A1 - プロレニン遺伝子またはプロレニン受容体遺伝子の発現を抑制する一本鎖核酸分子およびその用途 - Google Patents
プロレニン遺伝子またはプロレニン受容体遺伝子の発現を抑制する一本鎖核酸分子およびその用途 Download PDFInfo
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- A61K31/7105—Natural ribonucleic acids, i.e. containing only riboses attached to adenine, guanine, cytosine or uracil and having 3'-5' phosphodiester links
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- C12N15/11—DNA or RNA fragments; Modified forms thereof; Non-coding nucleic acids having a biological activity
- C12N15/113—Non-coding nucleic acids modulating the expression of genes, e.g. antisense oligonucleotides; Antisense DNA or RNA; Triplex- forming oligonucleotides; Catalytic nucleic acids, e.g. ribozymes; Nucleic acids used in co-suppression or gene silencing
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- C12N15/113—Non-coding nucleic acids modulating the expression of genes, e.g. antisense oligonucleotides; Antisense DNA or RNA; Triplex- forming oligonucleotides; Catalytic nucleic acids, e.g. ribozymes; Nucleic acids used in co-suppression or gene silencing
- C12N15/1137—Non-coding nucleic acids modulating the expression of genes, e.g. antisense oligonucleotides; Antisense DNA or RNA; Triplex- forming oligonucleotides; Catalytic nucleic acids, e.g. ribozymes; Nucleic acids used in co-suppression or gene silencing against enzymes
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- C12N15/113—Non-coding nucleic acids modulating the expression of genes, e.g. antisense oligonucleotides; Antisense DNA or RNA; Triplex- forming oligonucleotides; Catalytic nucleic acids, e.g. ribozymes; Nucleic acids used in co-suppression or gene silencing
- C12N15/1138—Non-coding nucleic acids modulating the expression of genes, e.g. antisense oligonucleotides; Antisense DNA or RNA; Triplex- forming oligonucleotides; Catalytic nucleic acids, e.g. ribozymes; Nucleic acids used in co-suppression or gene silencing against receptors or cell surface proteins
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- C12N2310/00—Structure or type of the nucleic acid
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- C12N2310/35—Nature of the modification
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- C12N2310/3519—Fusion with another nucleic acid
Definitions
- the present invention relates to a nucleic acid molecule that suppresses the expression of a prorenin gene or a prorenin receptor gene, a composition containing the same, and a use thereof.
- the renin-angiotensin system is mainly involved in regulating blood pressure and maintaining electrolyte balance (circulating RAS), but plays a role in organ differentiation such as cell differentiation / proliferation and tissue repair (tissue RAS). ).
- tissue RAS renin-angiotensin system
- activation of tissue RAS stimulates signaling pathways via angiotensin type 1 receptor and induces expression of inflammation-related molecules such as VEGF, MCP-1 and ICAM-1 It is involved in vascular pathology.
- Prorenin which was thought to be just an inactive precursor of renin, is a transmembrane receptor common to renin and prorenin (ATP6AP2; ATPase, H + transporting, lysosomal accessory protein 2.
- ATP6AP2 ATP6AP2
- ATPase ATPase
- H + transporting lysosomal accessory protein 2.
- RNA interference is known as a technique for suppressing gene expression. Inhibition of gene expression by RNA interference is generally performed, for example, by administering a short double-stranded RNA molecule to a cell or the like.
- the double-stranded RNA molecule is usually called siRNA (small interfering RNA).
- siRNA small interfering RNA
- Patent Documents 1 and 2 Non-Patent Document 1
- An object of the present invention is to provide a nucleic acid molecule effective for treatment of a disease associated with expression of a prorenin gene or a prorenin receptor gene, and a medicine using the same.
- the present inventors have used a specific linker in which a region containing a nucleotide sequence targeting a specific partial sequence in a prorenin gene or a prorenin receptor gene and a region containing a complementary chain sequence thereof are linked using a specific linker.
- the present inventors have found that a strand nucleic acid molecule can remarkably suppress the expression of a prorenin gene or a prorenin receptor gene and can improve the pathological condition in an animal model of uveitis, thereby completing the present invention.
- a single-stranded nucleic acid molecule that suppresses the expression of a prorenin gene or a prorenin receptor gene It consists only of region (X), linker region (Lx) and region (Xc)
- the linker region (Lx) has a non-nucleotide structure containing at least one of a pyrrolidine skeleton and a piperidine skeleton,
- One of the region (X) and the region (Xc) is the following SEQ ID NO: 1 to 5: (SEQ ID NO: 1) 5'-UGAUGUUGUCGAAGAUAGGGG -3 ' (SEQ ID NO: 2) 5'-UUGAUAUAGUGGAAAUUCCCU -3 ' (SEQ ID NO: 3) 5'- UGAUAUAGUGGAAAUUCCCUU -3 ' (SEQ ID NO: 4) 5'- UAGAACUUUCGGAUGAAGGUG -3 ' (SEQ ID NO: 5) 5
- the region (X), the linker region (Lx), and the region (Xc) are arranged in this order from the 3 ′ side to the 5 ′ side, and the number of bases (X) of the region (X) and the region (Xc)
- X Xc (2)
- [3] The nucleic acid molecule according to [2] above, wherein the number of bases (X) in the region (X) and the number of bases (Xc) in the region (Xc) satisfy the condition of the following formula (3).
- X 1 and X 2 are each independently H 2 , O, S or NH; Y 1 and Y 2 are each independently a single bond, CH 2 , NH, O or S; R 3 is a hydrogen atom or substituent bonded to C-3, C-4, C-5 or C-6 on ring A; L 1 is an alkylene chain consisting of n atoms, where the hydrogen atom on the alkylene carbon atom is replaced by OH, OR a , NH 2 , NHR a , NR a R b , SH, or SR a May or may not be substituted, or L 1 is a polyether chain in which one or more carbon atoms of the alkylene chain are substituted with an oxygen atom, Provided that when Y 1 is NH, O or S, the L 1 atom bonded to Y 1 is carbon, the L 1 atom bonded to OR 1 is carbon, and oxygen atoms are not adjacent to each other; L 2 is an alkylene chain consisting
- the ring A may contain a carbon-carbon double bond or a carbon-nitrogen double bond
- the region (Xc) and the region (X) each bind to the linker region (Lx) via -OR 1 -or -OR 2-
- R 1 and R 2 may be present or absent, and when present, R 1 and R 2 are each independently a nucleotide residue or the structure (I).
- [6] The nucleic acid molecule according to any one of [1] to [5], wherein the linker region (Lx) is represented by the following formula (I-4a) or (I-6a).
- nucleic acid molecule according to any one of [1] to [7] above comprising at least one modified residue.
- nucleic acid molecule according to any one of [1] to [9] above which contains a stable isotope.
- nucleic acid molecule according to any one of [1] to [10] wherein the total number of bases is 38 bases or more.
- nucleic acid molecule according to any one of [1] to [11] above, comprising any one of the nucleotide sequences represented by SEQ ID NOs: 23 to 33 below.
- SEQ ID NO: 23 5'- CCUAUCUUCGACAACAUCAUCCC-Lx-GGGAUGAUGUUGUCGAAGAUAGGGG -3 '
- SEQ ID NO: 24 5'- GGAAUUUCCACUAUAUCAACCCC-Lx-GGGGUUGAUAUAGUGGAAAUUCCCU -3 '
- SEQ ID NO: 25 5'- GGGAAUUUCCACUAUAUCAACCC-Lx-GGGUUGAUAUAGUGGAAAUUCCCUU -3 '
- SEQ ID NO: 26 5'- CCUUCAUCCGAAAGUUCUACACC-Lx-GGUGUAGAACUUUCGGAUGAAGGUG -3 '
- SEQ ID NO: 27 5'- GUUCUACACAGAGUUUGAUCGCC-
- a medicament comprising the nucleic acid molecule according to any one of [1] to [12] above.
- a therapeutic agent for ophthalmic diseases comprising the nucleic acid molecule according to any one of [1] to [12] above.
- the ophthalmic disease is selected from the group consisting of diabetic retinopathy, uveitis and age-related macular degeneration.
- the ophthalmic disease is selected from the group consisting of diabetic retinopathy, uveitis, age-related macular degeneration, and glaucoma.
- a method for suppressing the expression of a prorenin gene or a prorenin receptor gene comprising using the nucleic acid molecule according to any one of [1] to [12] above.
- the method described in [18] above comprising a step of administering the nucleic acid molecule to a cell, tissue or organ.
- the method described in [19] above wherein the administration is performed in vitro.
- the expression of a prorenin gene or a prorenin receptor gene can be remarkably suppressed in vivo. Therefore, the nucleic acid molecule can be a promising candidate for a therapeutic agent for diseases involving the receptor-bound prorenin system (RAPS), for example, ophthalmic diseases such as diabetic retinopathy, uveitis, and age-related macular degeneration.
- RAPS receptor-bound prorenin system
- the molecule can also be a promising candidate for therapeutics for ophthalmic diseases such as diabetic retinopathy, uveitis, age-related macular degeneration, glaucoma and the like.
- FIG. 1 is a schematic diagram showing an example of the nucleic acid molecule of the present invention.
- FIG. 2 is a graph showing the relative value of the expression level of the prorenin gene in the examples of the present invention.
- FIG. 3 is a graph showing the relative value of the expression level of the prorenin receptor gene in the examples of the present invention.
- FIG. 4 is a graph showing the relative value of the expression level of the human prorenin receptor gene in the examples of the present invention.
- FIG. 5 is a graph showing the relative value of the expression level of the mouse prorenin receptor gene in the examples of the present invention.
- FIG. 6 is a graph showing the relative value of the expression level of the rat prorenin receptor gene in the examples of the present invention.
- FIG. 1 is a schematic diagram showing an example of the nucleic acid molecule of the present invention.
- FIG. 2 is a graph showing the relative value of the expression level of the prorenin gene in the examples of the present invention.
- FIG. 3 is a graph showing
- FIG. 7 is a graph showing the relative value of the expression level of the human prorenin gene in the examples of the present invention.
- FIG. 8 is a graph showing the relative values of the expression levels of CCL2 / MCP-1, ICAM-1, IL-6, and TNF- ⁇ genes in the examples of the present invention.
- FIG. 9 is a diagram showing the nuclease resistance (A) of a single-stranded nucleic acid molecule and the effect of suppressing the expression of prorenin receptor protein (B) by the single-stranded nucleic acid molecule in Examples of the present invention.
- FIG. 10 is a micrograph (A-D, F, G) of a vitreous body in an example of the present invention, and a graph (E, H) showing the white blood cell count.
- FIG. 11 is a graph showing the relative value of the expression level of inflammatory cytokine genes in the examples of the present invention.
- FIG. 12 is a diagram showing a micrograph (AC) of a retina, a graph (D) showing a relative value of the length of photoreceptor outer segments, and a result (E) of rhodopsin immunoblot analysis in an example of the present invention.
- FIG. 13 is a micrograph (A-D) of a vitreous body, a graph (E) showing the white blood cell count, and a graph (F-I) showing a relative value of the expression level of the inflammatory cytokine gene in Examples of the present invention.
- FIG. 14 is a graph (A) showing the measurement results of the area of CNV in the example of the present invention, and a micrograph (B-D) of CNV.
- nucleic acid molecule for suppressing expression of prorenin gene or prorenin receptor gene (1) Expression suppressing sequence and complementary sequence As described above, the nucleic acid molecule of the present invention is a single molecule that suppresses the expression of prorenin gene or prorenin receptor gene.
- a prorenin gene or a prorenin receptor gene expression-suppressing sequence comprising a nucleotide sequence consisting of at least 18 consecutive nucleotides (referred to as “r nucleotide sequence”).
- the expression suppression sequence may be, for example, a sequence consisting only of the r nucleotide sequence or a sequence containing the r nucleotide sequence.
- the expression suppressing sequence is a sequence containing an r nucleotide sequence, one or more nucleotides are added to the 5 ′ end and / or the 3 ′ end of the r nucleotide sequence.
- the prorenin gene or the prorenin receptor gene here, “complementary” conforms to the definition of complementary sequence described later).
- nucleotides (sequences) other than the expression suppression sequence in the region (X or Xc) containing the expression suppression sequence in the nucleic acid molecule of the present invention described later do not need to be complementary to the target gene.
- the length of the expression suppression sequence is not particularly limited, and is, for example, 18 to 32 nucleotides in length, preferably 19 to 30 nucleotides in length, and more preferably 19, 20, or 21 nucleotides in length.
- the numerical range of the number of bases discloses all positive integers belonging to the range.
- the description “1 to 4 bases” means “1, 2, 3, 4 bases” "Means all disclosures (the same applies hereinafter).
- the single-stranded nucleic acid molecule of the present invention further has a complementary sequence that can be annealed to the expression suppressing sequence.
- the complementary sequence may not necessarily be completely complementary as long as it can be annealed with the expression-suppressing sequence under physiological conditions in the target cell. That is, the complementary sequence may be a sequence having 100% complementarity in a region overlapping with the expression suppressing sequence, for example, 90% to 100%, 93% to 100%, 95% to 100%, It may be a sequence having complementarity of 98% to 100%, 99% to 100%, or the like.
- the complementary sequence is in the nucleotide sequence represented by the following SEQ ID NO: n + 11, It includes a sequence complementary to the r nucleotide sequence (referred to as “s nucleotide sequence”).
- the complementary sequence may be, for example, a sequence consisting of the s nucleotide sequence or a sequence containing the s nucleotide sequence.
- the length of the complementary sequence is not particularly limited and is, for example, 18 to 32 nucleotides in length, preferably 19 to 30 nucleotides in length, and more preferably 19, 20, or 21 nucleotides in length.
- the expression suppression sequence and the complementary sequence may each be, for example, an RNA molecule consisting of only ribonucleotide residues, or an RNA molecule containing deoxyribonucleotide residues in addition to ribonucleotide residues.
- a uracil (U) residue When a uracil (U) residue is substituted with a deoxyribonucleotide residue, it may be substituted with either dT or dU.
- the region containing the expression suppressing sequence and the region containing the complementary sequence are indirectly linked via a linker region.
- the order of connection between the region containing the expression suppressing sequence and the region containing the complementary sequence is not particularly limited.
- the 5 ′ end side of the expression suppressing sequence and the 3 ′ end side of the complementary sequence are linker regions.
- the 3 ′ end side of the expression suppressing sequence and the 5 ′ end side of the complementary sequence may be linked via a linker region. The former is preferred.
- the linker region may be composed of, for example, nucleotide residues or non-nucleotide residues. Alternatively, it may be composed of both nucleotide and non-nucleotide residues. Preferably, the linker region is composed of non-nucleotide residues.
- the single-stranded nucleic acid molecule of the present invention is a molecule in which a 5 ′ region and a 3 ′ region are annealed with each other to form a double-stranded structure (stem structure).
- stem structure a double-stranded structure
- shRNA small hairpin RNA or short hairpin RNA
- the shRNA has a hairpin structure and generally has one stem region and one loop region.
- the nucleic acid molecule of this embodiment is composed of only the region (X), the linker region (Lx), and the region (Xc), and the region (X) and the region (Xc) having a complementary structure are combined with the linker region ( Lx). Specifically, since one of the region (X) and the region (Xc) includes the expression suppression sequence and the other includes the complementary sequence, the region (X) and the region (X) are obtained by intramolecular annealing.
- a stem structure can be formed between the region (Xc) and the linker region (Lx) has a loop structure.
- the nucleic acid molecule may have the region (Xc), the linker region (Lx) and the region (X) in this order from the 5 ′ side to the 3 ′ side, or from the 3 ′ side to the 5 ′ side. You may have in this order over the side.
- the former is preferred.
- the expression suppressing sequence may be arranged in either the region (X) or the region (Xc), but is preferably arranged downstream of the complementary sequence, that is, 3 ′ side of the complementary sequence. . Therefore, when the nucleic acid molecule has the region (Xc), the linker region (Lx), and the region (X) in this order from the 5 ′ side to the 3 ′ side, the expression suppressing sequence is the region ( X) is preferably arranged within.
- FIG. 1 (A) is a schematic diagram showing an outline of the order of each region
- FIG. 1 (B) is a schematic diagram showing a state in which the nucleic acid molecule forms a duplex in the molecule. is there.
- the nucleic acid molecule forms a duplex between the region (Xc) and the region (X), and the Lx region loops according to its length.
- FIG. 1 merely shows the linking order of the regions and the positional relationship of each region forming a double chain. For example, the length of each region, the shape of the linker region (Lx), etc. Not limited.
- the number of nucleotides in the region (Xc) and the region (X) is not particularly limited. Although the length of each area
- the lower limit of the number of nucleotides in the region (X) is, for example, 19 nucleotides, preferably 20 bases.
- the upper limit is, for example, 50 nucleotides, preferably 30 nucleotides, and more preferably 25 nucleotides.
- Specific examples of the number of nucleotides in the region (X) are, for example, 19 to 50 nucleotides, preferably 19 to 30 nucleotides, and more preferably 19 to 25 nucleotides.
- the lower limit of the number of nucleotides in the region (Xc) is, for example, 19 nucleotides, preferably 20 nucleotides.
- the upper limit is, for example, 50 nucleotides, preferably 30 nucleotides, and more preferably 25 nucleotides.
- Specific examples of the number of nucleotides in the region (Xc) are, for example, 19 to 50 nucleotides, preferably 19 to 30 nucleotides, and more preferably 19 to 25 nucleotides.
- the region (X or Xc) containing the expression suppression sequence may be composed of only the expression suppression sequence, or may include the expression suppression sequence.
- the number of nucleotides of the expression suppression sequence is as described above.
- the region containing the expression suppression sequence may further have an additional sequence on the 5 ′ side and / or 3 ′ side of the expression suppression sequence.
- the additional sequence is preferably added to the linker region (Lx) side.
- the expression suppressing sequence Is preferably located within the region (X).
- an additional sequence is added to the 5 ′ side of the expression suppressing sequence.
- the number of nucleotides of the additional sequence is, for example, 1 to 31 nucleotides, preferably 1 to 21 nucleotides, more preferably 1 to 11 nucleotides, and particularly preferably 1, 2, 3, 4, 5 or 6 nucleotides.
- the region containing the expression suppressing sequence one of X or Xc
- the region containing the complementary sequence is also the linker region (Lx) It contains a sequence complementary to the additional sequence on the side.
- the relationship between the number of nucleotides (X) in the region (X) and the number of nucleotides (Xc) in the region (Xc) satisfies, for example, the following conditions (1) or (2).
- the following condition (4) is satisfied.
- the nucleic acid molecule schematically shown in FIG. 1 (B) satisfies the following condition (1).
- X ⁇ Xc 1 to 10, preferably 1, 2 or 3, More preferably 1 or 2 (4)
- X Xc (2)
- the linker region (Lx) preferably has a structure that does not cause self-annealing within its own region.
- the linker region (Lx) includes a nucleotide residue as described above, the length is not particularly limited.
- the linker region (Lx) preferably has a length that allows the region (X) and the region (Xc) to form a double chain.
- the lower limit of the number of nucleotides in the linker region (Lx) is, for example, 1 base, preferably 2 bases, more preferably 3 bases, and the upper limit thereof is, for example, 100 bases, preferably 80 bases, more preferably 50 bases.
- the total length of the nucleic acid molecule is not particularly limited.
- the lower limit of the total number of nucleotides is, for example, 38 nucleotides, preferably 42 nucleotides, Preferably it is 50 nucleotides, more preferably 51 nucleotides, particularly preferably 52 nucleotides.
- the upper limit is, for example, 300 nucleotides, preferably 200 nucleotides, more preferably 150 nucleotides, still more preferably 100 nucleotides, and particularly preferably 80 nucleotides.
- the lower limit of the total number of nucleotides excluding the linker region (Lx) is, for example, 36 nucleotides, preferably 38 nucleotides.
- the upper limit is, for example, 100 nucleotides, preferably 80 nucleotides, more preferably 60 nucleotides, and still more preferably 50 nucleotides.
- Specific examples of the total number of nucleotides are, for example, 36 to 100 nucleotides, preferably 38 to 80 nucleotides, more preferably 42 to 60 nucleotides, and further preferably 42 to 50 nucleotides.
- the single-stranded nucleic acid molecule of the present invention has the linker region (Lx) having a non-nucleotide structure.
- the non-nucleotide structure is not particularly limited, and examples thereof include polyalkylene glycol, pyrrolidine skeleton and piperidine skeleton.
- examples of the polyalkylene glycol include polyethylene glycol.
- the pyrrolidine skeleton may be, for example, a skeleton of a pyrrolidine derivative in which one or more carbons constituting the 5-membered ring of pyrrolidine are substituted, and when substituted, for example, a carbon atom other than C-2 carbon. It is preferable.
- the carbon may be substituted with, for example, nitrogen, oxygen or sulfur.
- the pyrrolidine skeleton may contain, for example, a carbon-carbon double bond or a carbon-nitrogen double bond in the 5-membered ring of pyrrolidine.
- carbon and nitrogen constituting the 5-membered ring of pyrrolidine may be bonded to, for example, hydrogen or a substituent as described later.
- the linker region (Lx) may be bonded to the region (X) and the region (Xc) through, for example, any group of the pyrrolidine skeleton, and preferably any one of the 5-membered rings Carbon atoms and nitrogen, preferably the 2-position carbon (C-2) and nitrogen of the 5-membered ring.
- the pyrrolidine skeleton include a proline skeleton and a prolinol skeleton.
- the proline skeleton, prolinol skeleton, and the like are excellent in safety because they are, for example, in-vivo substances and their reduced forms.
- the piperidine skeleton may be, for example, a skeleton of a piperidine derivative in which one or more carbons constituting the six-membered ring of piperidine are substituted, and when substituted, for example, a carbon atom other than carbon of C-2 It is preferable.
- the carbon may be substituted with, for example, nitrogen, oxygen or sulfur.
- the piperidine skeleton may contain, for example, a carbon-carbon double bond or a carbon-nitrogen double bond in the 6-membered ring of piperidine.
- the carbon and nitrogen constituting the piperidine 6-membered ring may be bonded to, for example, a hydrogen group or a substituent as described later.
- the linker region (Lx) may be bonded to the region (X) and the region (Xc), for example, via any group of the piperidine skeleton, and preferably any one of the six-membered rings Carbon atoms and nitrogen, more preferably carbon (C-2) and nitrogen at the 2-position of the 6-membered ring.
- the linker region may include, for example, only a non-nucleotide residue having the non-nucleotide structure, or may include a non-nucleotide residue having the non-nucleotide structure and a nucleotide residue.
- the linker region is represented by, for example, the following formula (I).
- X 1 and X 2 are each independently H 2 , O, S or NH; Y 1 and Y 2 are each independently a single bond, CH 2 , NH, O or S; R 3 is a hydrogen atom or substituent bonded to C-3, C-4, C-5 or C-6 on ring A; L 1 is an alkylene chain consisting of n atoms, where the hydrogen atom on the alkylene carbon atom is replaced by OH, OR a , NH 2 , NHR a , NR a R b , SH, or SR a May or may not be substituted, or L 1 is a polyether chain in which one or more carbon atoms of the alkylene chain are substituted with an oxygen atom, Provided that when Y 1 is NH, O or S, the L 1 atom bonded to Y 1 is carbon, the L 1 atom bonded to OR 1 is carbon, and oxygen atoms are not adjacent to each other; L 2 is an alkylene chain consisting of n
- X 1 and X 2 are each independently, for example, H 2 , O, S or NH.
- X 1 being H 2 means that X 1 forms CH 2 (methylene group) together with the carbon atom to which X 1 is bonded. The same applies to the X 2.
- Y 1 and Y 2 are each independently a single bond, CH 2 , NH, O or S.
- l 1 or 2.
- ring A is a 5-membered ring, for example, the pyrrolidine skeleton.
- the pyrrolidine skeleton include a proline skeleton and a prolinol skeleton, and examples thereof include a bivalent structure.
- ring A is a 6-membered ring, for example, the piperidine skeleton.
- one carbon atom other than C-2 on ring A may be substituted with nitrogen, oxygen or sulfur.
- Ring A may contain a carbon-carbon double bond or a carbon-nitrogen double bond in ring A.
- Ring A may be, for example, either L-type or D-type.
- R 3 is a hydrogen atom or a substituent bonded to C-3, C-4, C-5 or C-6 on the ring A.
- R 3 is the above-described substituent, the substituent R 3 may be one, plural, or absent, and when plural, it may be the same or different.
- the substituent R 3 is, for example, halogen, OH, OR 4 , NH 2 , NHR 4 , NR 4 R 5 , SH, SR 4 or an oxo group ( ⁇ O).
- R 4 and R 5 are, for example, each independently a substituent or a protecting group, and may be the same or different.
- substituents include halogen, alkyl, alkenyl, alkynyl, haloalkyl, aryl, heteroaryl, arylalkyl, cycloalkyl, cycloalkenyl, cycloalkylalkyl, cyclylalkyl, hydroxyalkyl, alkoxyalkyl, aminoalkyl, heterocyclylalkenyl. , Heterocyclylalkyl, heteroarylalkyl, silyl, silyloxyalkyl and the like. The same applies hereinafter.
- the substituent R 3 may be any of these listed substituents.
- the protecting group is, for example, a functional group that converts a highly reactive functional group to inert, and examples thereof include known protecting groups.
- the description of the literature J. F. W. McOmie, “Protecting Groups in Organic Chemistry” Prenum Press, London and New York, 1973) can be cited as the protecting group.
- the protective group is not particularly limited, and examples thereof include tert-butyldimethylsilyl group (TBDMS), bis (2-acetoxyethyloxy) methyl group (ACE), triisopropylsilyloxymethyl group (TOM), 1- (2 -Cyanoethoxy) ethyl group (CEE), 2-cyanoethoxymethyl group (CEM), tolylsulfonylethoxymethyl group (TEM), dimethoxytrityl group (DMTr) and the like.
- TBDMS tert-butyldimethylsilyl group
- ACE (2-acetoxyethyloxy) methyl group
- TOM triisopropylsilyloxymethyl group
- CEE 2-Cyanoethoxymethyl group
- CEM 2-cyanoethoxymethyl group
- TEM dimethoxytrityl group
- DMTr dimethoxytrityl group
- L 1 is an alkylene chain consisting of n atoms.
- the hydrogen atom on the alkylene carbon atom may be substituted with, for example, OH, OR a , NH 2 , NHR a , NR a R b , SH, or SR a , or may not be substituted.
- L 1 may be a polyether chain in which one or more carbon atoms of the alkylene chain are substituted with an oxygen atom.
- the polyether chain is, for example, polyethylene glycol.
- L 2 is an alkylene chain consisting of m atoms.
- the hydrogen atom on the alkylene carbon atom may be substituted with, for example, OH, OR c , NH 2 , NHR c , NR c R d , SH or SR c , or may not be substituted.
- L 2 may be a polyether chain in which one or more carbon atoms of the alkylene chain are substituted with an oxygen atom.
- Y 2 is NH, O, or S
- the L 2 atom bonded to Y 2 is carbon
- the L 2 atom bonded to OR 2 is carbon
- oxygen atoms are not adjacent to each other. That is, for example, when Y 2 is O, the oxygen atom and the oxygen atom of L 2 are not adjacent, and the oxygen atom of OR 2 and the oxygen atom of L 2 are not adjacent.
- N in L 1 and m in L 2 are not particularly limited, and the lower limit is, for example, 0, and the upper limit is not particularly limited.
- n and m can be appropriately set depending on, for example, the desired length of the linker region (Lx).
- n and m are each preferably 0 to 30, more preferably 0 to 20, and still more preferably 0 to 15 from the viewpoint of production cost and yield.
- n + m is, for example, 0 to 30, preferably 0 to 20, and more preferably 0 to 15.
- R a , R b , R c and R d are, for example, each independently a substituent or a protecting group.
- the substituent and the protecting group are the same as described above, for example.
- hydrogen atoms may be independently substituted with halogens such as Cl, Br, F and I, for example.
- the region (Xc) and the region (X) are bonded to the linker region (Lx) via —OR 1 — or —OR 2 —, respectively.
- R 1 and R 2 may or may not exist.
- R 1 and R 2 are each independently a nucleotide residue or the structure of formula (I) above.
- the linker region (Lx) is, for example, the non-nucleotide residue having the structure of the formula (I) excluding the nucleotide residue R 1 and / or R 2. And a nucleotide residue.
- the linker region (Lx) has, for example, two or more non-nucleotide residues having the structure of the formula (I) linked to each other. It becomes a structure.
- the structure of the formula (I) may include, for example, 1, 2, 3 or 4.
- the linker region (Lx) is formed only from the non-nucleotide residue having the structure of the formula (I).
- the combination of the bond between the region (Xc) and the region (X) and the —OR 1 — and —OR 2 — is not particularly limited, and examples thereof include any of the following conditions.
- Condition 1) The region (Xc) is bonded to the structure of the formula (I) through —OR 2 —, and the region (X) is bonded through —OR 1 —.
- Condition (2) The region (Xc) is bonded to the structure of the formula (I) through —OR 1 —, and the region (X) is bonded through —OR 2 —.
- Examples of the structure of the formula (I) include the following formulas (I-1) to (I-9), in which n and m are the same as those in the formula (I).
- q is an integer of 0 to 10.
- n, m and q are not particularly limited and are as described above.
- the nucleic acid molecule of the present invention has any of the following structural formulas: (SEQ ID NO: 23) 5'- CCUAUCUUCGACAACAUCAUCCC-Lx-GGGAUGAUGUUGUCGAAGAUAGGGG -3 ' (SEQ ID NO: 24) 5'- GGAAUUUCCACUAUAUCAACCCC-Lx-GGGGUUGAUAUAGUGGAAAUUCCCU -3 ' (SEQ ID NO: 25) 5'- GGGAAUUUCCACUAUAUCAACCC-Lx-GGGUUGAUAUAGUGGAAAUUCCCUU -3 ' (SEQ ID NO: 26) 5'- CCUUCAUCCGAAAGUUCUACACC-Lx-GGUGUAGAACUUUCGGAUGAAGGUG -3 ' (SEQ ID NO: 27) 5'- GUUCUACACAGAGUUUGAUCGCC-Lx-GGCGAUCAAACUCUGUGUAGAACUU -3 ' (SEQ ID NO:
- Lx has a structure represented by the above formula (I), and more preferably, the above formulas (I-1) to (I-9) Having a structure represented by any of the above, more preferably having the structure represented by the above formula (I-4a) or (I-6a), particularly preferably represented by the above formula (I-6a) Has a structure.) Of these, single-stranded nucleic acid molecules consisting of the nucleotide sequences represented by SEQ ID NOs: 30 to 32 are particularly preferred.
- the structural unit of the nucleic acid molecule of the present invention is not particularly limited, and examples thereof include nucleotide residues.
- the nucleotide residue include a ribonucleotide residue and a deoxyribonucleotide residue.
- the nucleotide residue include an unmodified unmodified nucleotide residue and a modified modified nucleotide residue.
- the nucleic acid molecule of the present invention can improve nuclease resistance and stability, for example, by including the modified nucleotide residue.
- the nucleic acid molecule of the present invention may further contain a non-nucleotide residue in addition to the nucleotide residue, for example.
- each of the constituent units in the region other than the linker is preferably the nucleotide residue.
- Each region is composed of the following residues (1) to (3), for example. (1) Unmodified nucleotide residues (2) Modified nucleotide residues (3) Unmodified nucleotide residues and modified nucleotide residues
- the structural unit of the linker region is not particularly limited, and examples thereof include the nucleotide residue and the non-nucleotide residue.
- the linker region may be composed of, for example, only the nucleotide residue, may be composed of only the non-nucleotide residue, or may be composed of the nucleotide residue and the non-nucleotide residue.
- the linker region is composed of the following residues (1) to (7), for example.
- nucleic acid molecule of the present invention examples include a molecule composed only of the nucleotide residue, a molecule containing the non-nucleotide residue in addition to the nucleotide residue, and the like.
- the nucleotide residue may be, for example, only the unmodified nucleotide residue, only the modified nucleotide residue, or the unmodified nucleotide residue and the modification. Both nucleotide residues may be used.
- the number of the modified nucleotide residue is not particularly limited, and is, for example, “one or several”, specifically For example, 1 to 5, preferably 1 to 4, more preferably 1 to 3, and most preferably 1 or 2.
- the nucleic acid molecule of the present invention includes the non-nucleotide residue
- the number of the non-nucleotide residue is not particularly limited, and is, for example, “1 or several”, specifically, for example, 1 to There are 8, 1-6, 1-4, 1, 2 or 3.
- the number of the modified ribonucleotide residue is not particularly limited, and for example, “1 or several” Specifically, for example, 1 to 5, preferably 1 to 4, more preferably 1 to 3, and most preferably 1 or 2.
- the modified ribonucleotide residue relative to the unmodified ribonucleotide residue may be, for example, the deoxyribonucleotide residue in which a ribose residue is replaced with a deoxyribose residue.
- the number of deoxyribonucleotide residues is not particularly limited, and is, for example, “1 or several”. Specifically, for example, 1 to 5, preferably 1 to 4, more preferably 1 to 3, and most preferably 1 or 2.
- the nucleic acid molecule of the present invention may contain, for example, a labeling substance and be labeled with the labeling substance.
- the labeling substance is not particularly limited, and examples thereof include fluorescent substances, dyes, isotopes and the like.
- the labeling substance include fluorophores such as pyrene, TAMRA, fluorescein, Cy3 dye, and Cy5 dye, and examples of the dye include Alexa dye such as Alexa488.
- the isotope include a stable isotope and a radioactive isotope, and preferably a stable isotope.
- the stable isotope has a low risk of exposure and does not require a dedicated facility, so that it is easy to handle and the cost can be reduced.
- the stable isotope does not change the physical properties of the labeled compound, for example, and is excellent in properties as a tracer.
- the stable isotope is not particularly limited, and examples thereof include 2 H, 13 C, 15 N, 17 O, 18 O, 33 S, 34 S, and 36 S.
- nucleotide residues constituting single-stranded nucleic acid molecules include, for example, sugars, bases and phosphates as constituent elements.
- examples of the nucleotide residue include a ribonucleotide residue and a deoxyribonucleotide residue as described above.
- the ribonucleotide residue has, for example, a ribose residue as a sugar, and has as bases adenine (A), guanine (G), cytosine (C) and uracil (U), and the deoxyribose residue is For example, it has a deoxyribose residue as a sugar and has adenine (A), guanine (G), cytosine (C) and thymine (T) as bases.
- the nucleotide residue includes an unmodified nucleotide residue and a modified nucleotide residue.
- each of the constituent elements is, for example, the same or substantially the same as that existing in nature, and preferably the same or substantially the same as that naturally occurring in the human body. .
- the modified nucleotide residue is, for example, a nucleotide residue obtained by modifying the unmodified nucleotide residue.
- the modified nucleotide residue for example, any of the constituent elements of the unmodified nucleotide residue may be modified.
- “modification” refers to, for example, substitution, addition and / or deletion of the component, substitution, addition and / or deletion of atoms and / or functional groups in the component, and is referred to as “modification”. be able to.
- modified nucleotide residue include naturally occurring nucleotide residues, artificially modified nucleotide residues, and the like. See, for example, Limbach et al.
- modified nucleotide residue may be, for example, a residue of the nucleotide substitute.
- ribophosphate skeleton examples include modification of a ribose-phosphate skeleton (hereinafter referred to as ribophosphate skeleton).
- a ribose residue can be modified.
- the ribose residue can be modified, for example, at the 2′-position carbon.
- a hydroxyl group bonded to the 2′-position carbon can be substituted with a halogen such as hydrogen or fluoro.
- the ribose residue can be replaced with deoxyribose.
- the ribose residue can be substituted with, for example, a stereoisomer, and can be substituted with, for example, an arabinose residue.
- the ribophosphate skeleton may be substituted with a non-ribophosphate skeleton having a non-ribose residue and / or non-phosphate, for example.
- the non-ribophosphate skeleton include uncharged ribophosphate skeletons.
- the substitute for the nucleotide substituted with the non-ribophosphate skeleton include morpholino, cyclobutyl, pyrrolidine and the like.
- Other examples of the substitute include artificial nucleic acid monomer residues. Specific examples include PNA (peptide nucleic acid), LNA (Locked Nucleic Acid), ENA (2'-O, 4'-C-Ethylenebridged Nucleic Acid), and PNA is preferable.
- a phosphate group can be modified.
- the phosphate group closest to the sugar residue is called an ⁇ -phosphate group.
- the ⁇ -phosphate group is negatively charged, and the charge is evenly distributed over two oxygen atoms that are not bound to a sugar residue.
- the four oxygen atoms in the ⁇ -phosphate group in the phosphodiester bond between nucleotide residues, the two oxygen atoms that are non-bonded to the sugar residue are hereinafter referred to as “non-linking oxygen”.
- the two oxygen atoms bonded to the sugar residue are hereinafter referred to as “linking oxygen”.
- the ⁇ -phosphate group is preferably subjected to, for example, a modification that makes it uncharged or a modification that makes the charge distribution in the unbound oxygen asymmetric.
- the phosphate group may replace the non-bonded oxygen, for example.
- the oxygen is, for example, one of S (sulfur), Se (selenium), B (boron), C (carbon), H (hydrogen), N (nitrogen), and OR (R is an alkyl group or an aryl group).
- R is an alkyl group or an aryl group.
- the non-bonded oxygen for example, both are preferably substituted, and more preferably, both are substituted with S.
- the modified phosphate group include phosphorothioate, phosphorodithioate, phosphoroselenate, boranophosphate, boranophosphate ester, phosphonate hydrogen, phosphoramidate, alkyl or arylphosphonate, and phosphotriester. Among them, phosphorodithioate in which the two non-bonded oxygens are both substituted with S is preferable.
- the phosphate group may substitute, for example, the bonded oxygen.
- the oxygen can be substituted with any atom of, for example, S (sulfur), C (carbon) and N (nitrogen), and the modified phosphate group is, for example, a bridged phosphoramidate, S substituted with N Substituted bridged phosphorothioates, bridged methylene phosphonates substituted with C, and the like.
- the substitution of the binding oxygen is preferably performed, for example, on at least one of the 5 ′ terminal nucleotide residue and the 3 ′ terminal nucleotide residue of the nucleic acid molecule of the present invention. For the 'side, substitution with N is preferred.
- the phosphate group may be substituted with, for example, the phosphorus-free linker.
- the linker include siloxane, carbonate, carboxymethyl, carbamate, amide, thioether, ethylene oxide linker, sulfonate, sulfonamide, thioform acetal, form acetal, oxime, methyleneimino, methylenemethylimino, methylenehydrazo, methylenedimethyl. Hydrazo, methyleneoxymethylimino and the like, preferably methylenecarbonylamino group and methylenemethylimino group.
- nucleic acid molecule of the present invention for example, at least one nucleotide residue at the 3 'end and the 5' end may be modified.
- the modification may be, for example, either the 3 'end or the 5' end, or both.
- the modification is, for example, as described above, and is preferably performed on the terminal phosphate group.
- the phosphate group may be modified as a whole, or one or more atoms in the phosphate group may be modified. In the former case, for example, the entire phosphate group may be substituted or deleted.
- Examples of the modification of the terminal nucleotide residue include addition of other molecules.
- Examples of the other molecule include functional molecules such as a labeling substance and a protecting group as described above.
- Examples of the protecting group include S (sulfur), Si (silicon), B (boron), ester-containing groups, and the like.
- the functional molecule such as the labeling substance can be used for detecting the nucleic acid molecule of the present invention, for example.
- the other molecule may be added to the phosphate group of the nucleotide residue, for example, or may be added to the phosphate group or the sugar residue via a spacer.
- the terminal atom of the spacer can be added or substituted, for example, to the binding oxygen of the phosphate group or O, N, S or C of the sugar residue.
- the binding site of the sugar residue is preferably, for example, 3'-position C or 5'-position C, or an atom bonded thereto.
- the spacer can be added or substituted at a terminal atom of a nucleotide substitute such as the PNA.
- the spacer is not particularly limited, and, for example,-(CH 2 ) n -,-(CH 2 ) n N-,-(CH 2 ) n O-,-(CH 2 ) n S-, O (CH 2 CH 2 O) n CH 2 CH 2 OH, abasic sugar, amide, carboxy, amine, oxyamine, oxyimine, thioether, disulfide, thiourea, sulfonamide, morpholino, etc., as well as biotin and fluorescein reagents Good.
- the molecule to be added to the terminal includes, for example, a dye, an intercalating agent (for example, acridine), a crosslinking agent (for example, psoralen, mitomycin C), a porphyrin (TPPC4, texaphyrin, suffirin), a polycyclic Aromatic hydrocarbons (eg, phenazine, dihydrophenazine), artificial endonucleases (eg, EDTA), lipophilic carriers (eg, cholesterol, cholic acid, adamantaneacetic acid, 1-pyrenebutyric acid, dihydrotestosterone, 1,3-bis- O (hexadecyl) glycerol, geranyloxyhexyl group, hexadecylglycerol, borneol, menthol, 1,3-propanediol, heptadecyl group, palmitic acid, myristic acid, O3- (o
- the 5 ′ end may be modified with, for example, a phosphate group or a phosphate group analog.
- the phosphate group include 5 ′ monophosphate ((HO) 2 (O) PO-5 ′), 5 ′ diphosphate ((HO) 2 (O) POP (HO) (O) —O— 5 '), 5' triphosphate ((HO) 2 (O) PO- (HO) (O) POP (HO) (O) -O-5 '), 5'-guanosine cap (7-methylated or Unmethylated, 7m-GO-5 '-(HO) (O) PO- (HO) (O) POP (HO) (O) -O-5'), 5'-adenosine cap (Appp), optional Modified or unmodified nucleotide cap structure (NO-5 '-(HO) (O) PO- (HO) (O) POP (HO) (O) -O-5'), 5 'monothio
- the base is not particularly limited.
- the base may be, for example, a natural base or a non-natural base.
- the base may be, for example, naturally derived or a synthetic product.
- As the base for example, a general base or a modified analog thereof can be used.
- Examples of the base include purine bases such as adenine and guanine, and pyrimidine bases such as cytosine, uracil and thymine.
- Other examples of the base include inosine, thymine, xanthine, hypoxanthine, nubularine, isoguanisine, tubercidine and the like.
- the base examples include alkyl derivatives such as 2-aminoadenine and 6-methylated purine; alkyl derivatives such as 2-propylated purine; 5-halouracil and 5-halocytosine; 5-propynyluracil and 5-propynylcytosine; -Azouracil, 6-azocytosine and 6-azothymine; 5-uracil (pseudouracil), 4-thiouracil, 5-halouracil, 5- (2-aminopropyl) uracil, 5-aminoallyluracil; 8-halogenated, aminated, Thiolated, thioalkylated, hydroxylated and other 8-substituted purines; 5-trifluoromethylated and other 5-substituted pyrimidines; 7-methylguanine; 5-substituted pyrimidines; 6-azapyrimidines; -6, and O-6 substituted purines (including 2-aminopropyladenine); 5-propy
- the modified nucleotide residue may include, for example, a residue lacking a base, that is, an abasic ribophosphate skeleton.
- the modified nucleotide residues are, for example, US Provisional Application No. 60 / 465,665 (filing date: April 25, 2003) and International Application No. PCT / US04 / 07070 (filing date: March 8, 2004).
- the residues described in (1)) can be used, and these documents can be incorporated into the present invention.
- Method for synthesizing nucleic acid molecule of the present invention is not particularly limited, and conventionally known methods can be employed.
- the synthesis method include a synthesis method using a genetic engineering technique, a chemical synthesis method, and the like.
- genetic engineering techniques include in vitro transcription synthesis, a method using a vector, and a method using a PCR cassette.
- the vector is not particularly limited, and examples thereof include non-viral vectors such as plasmids and viral vectors.
- the chemical synthesis method is not particularly limited, and examples thereof include a phosphoramidite method and an H-phosphonate method.
- a commercially available automatic nucleic acid synthesizer can be used.
- amidite is generally used.
- the amidite is not particularly limited, and commercially available amidites include, for example, RNA Phosphoramidites (2'-O-TBDMSi, trade name, Michisato Pharmaceutical), ACE amidite and TOM amidite, CEE amidite, CEM amidite, TEM amidite, etc. Is given.
- expression vector of the present invention contains the DNA encoding the nucleic acid molecule of the present invention under the control of a promoter functional in the target cell.
- the expression vector of the present invention is characterized by including a promoter operably linked to the DNA, and other configurations are not limited at all.
- the vector into which the DNA is inserted is not particularly limited, and for example, a general vector can be used, and examples thereof include viral vectors and non-viral vectors.
- non-viral vector examples include a plasmid vector.
- a target cell a cell having the prorenin gene and the prorenin receptor gene
- a gene transfer method known per se expression of the prorenin gene or the prorenin receptor gene in the cell Can be suppressed.
- the expression inhibitor of the present invention is a preparation that suppresses the expression of a prorenin gene or a prorenin receptor gene, and is characterized by comprising the nucleic acid molecule of the present invention as an active ingredient.
- the expression inhibitor of the present invention includes, for example, a step of administering the nucleic acid molecule alone or with a pharmacologically acceptable carrier to a subject in which the prorenin gene and the prorenin receptor gene are present.
- the administration step is performed, for example, by bringing the nucleic acid molecule into contact with the administration subject.
- the administration subject include cells, tissues or organs of non-human animals such as humans and non-human mammals other than humans.
- the administration may be, for example, in vivo or in vitro.
- Prorenin-prorenin receptor a therapeutic agent for ophthalmic diseases, has two different actions: activation of tissue RAS and activation of RAS-independent intracellular signals (collectively “receptor-bound prorenin system (RAPS)") It is deeply involved in inflammation and angiogenesis in ocular tissues. Therefore, the medicament comprising the nucleic acid molecule of the present invention as an active ingredient is effective in the treatment of ophthalmic diseases involving RAPS (eg, diabetic retinopathy, uveitis, age-related macular degeneration, etc.) by suppressing RAPS. is there.
- RAPS eg, diabetic retinopathy, uveitis, age-related macular degeneration, etc.
- the medicament containing the nucleic acid molecule of the present invention as an active ingredient is effective for the treatment of diabetic retinopathy, uveitis, age-related macular degeneration, and glaucoma.
- treatment is used in the meaning encompassing prevention and delay of onset of disease, improvement of disease, and improvement of prognosis.
- the medicament of the present invention may be used alone or in an effective amount of the nucleic acid molecule of the present invention, and may be formulated as a pharmaceutical composition together with any carrier, for example, a pharmaceutically acceptable carrier.
- Examples of pharmaceutically acceptable carriers include excipients such as sucrose and starch, binders such as cellulose and methylcellulose, disintegrants such as starch and carboxymethylcellulose, lubricants such as magnesium stearate and aerosil, citric acid, Fragrances such as menthol, preservatives such as sodium benzoate and sodium bisulfite, stabilizers such as citric acid and sodium citrate, suspensions such as methylcellulose and polyvinylpyrrolide, dispersants such as surfactants, water, Although diluents, such as physiological saline, base wax, etc. are mentioned, it is not limited to them.
- the medicament of the present invention can further contain a reagent for nucleic acid introduction.
- the nucleic acid introduction reagent include atelocollagen; liposome; nanoparticle; lipofectin, lipofectamine, DOGS (transfectam), DOPE, DOTAP, DDAB, DHDEAB, HDEAB, polybrene, or poly (ethyleneimine) (PEI) Cationic lipids such as can be used.
- the medicament of the present invention may be a pharmaceutical composition in which the nucleic acid molecule of the present invention is encapsulated in liposomes.
- Liposomes are fine closed vesicles having an inner phase surrounded by one or more lipid bilayers, and can usually retain a water-soluble substance in the inner phase and a fat-soluble substance in the lipid bilayer.
- the nucleic acid molecule of the present invention may be held in the liposome internal phase or in the lipid bilayer.
- the liposome used in the present invention may be a monolayer membrane or a multilayer membrane, and the particle size can be appropriately selected, for example, in the range of 10 to 1000 nm, preferably 50 to 300 nm. In consideration of deliverability to the target tissue, the particle size can be, for example, 200 nm or less, preferably 100 nm or less.
- Examples of methods for encapsulating water-soluble compounds such as nucleic acids in liposomes include the lipid film method (vortex method), reverse phase evaporation method, surfactant removal method, freeze-thaw method, remote loading method, etc. Without limitation, any known method can be appropriately selected.
- the medicament of the present invention can be administered locally to the eye to mammals, but it is particularly desirable to administer it by eye drops.
- Preparations suitable for topical ocular administration include eye drops (aqueous eye drops, non-aqueous eye drops, suspension eye drops, emulsion eye drops, etc.), ointments, lotions, creams and the like.
- eye drops aqueous eye drops, non-aqueous eye drops, suspension eye drops, emulsion eye drops, etc.
- ointments lotions, creams and the like.
- a base can be used as appropriate.
- the base used in the eye drops include phosphate buffer, Hanks buffer, physiological saline, perfusate, artificial tears and the like.
- the medicament of the present invention is a preparation for topical ophthalmic administration
- a buffer for example, a buffer, an isotonic agent, a solubilizing agent, a preservative, a viscous base, a chelating agent, a cooling agent, a pH adjuster, an antioxidant and the like are appropriately used.
- the buffer include a phosphate buffer, a borate buffer, a citrate buffer, a tartrate buffer, an acetate buffer, and an amino acid.
- the isotonic agent include saccharides such as sorbitol, glucose and mannitol, polyhydric alcohols such as glycerin and propylene glycol, salts such as sodium chloride, boric acid and the like.
- solubilizer examples include polyoxyethylene sorbitan monooleate (for example, polysorbate 80), polyoxyethylene hydrogenated castor oil, nonionic surfactants such as tyloxapol and pluronic, and polyhydric alcohols such as glycerin and macrogol. It is done.
- the preservative include quaternary ammonium salts such as benzalkonium chloride, benzethonium chloride, cetylpyridinium chloride, paraoxybenzoic acid such as methyl paraoxybenzoate, ethyl paraoxybenzoate, propyl paraoxybenzoate, and butyl paraoxybenzoate.
- Examples include esters, benzyl alcohol, sorbic acid and salts thereof (sodium salt, potassium salt, etc.), thimerosal (trade name), chlorobutanol, sodium dehydroacetate and the like.
- Examples of the viscous base include water-soluble polymers such as polyvinyl pyrrolidone, polyethylene glycol, and polyvinyl alcohol, and celluloses such as hydroxyethyl cellulose, methyl cellulose, hydroxypropyl methyl cellulose, and sodium carboxymethyl cellulose.
- Examples of chelating agents include sodium edetate and citric acid.
- Examples of the refreshing agent include l-menthol, borneol, camphor, and eucalyptus oil.
- Examples of the pH adjuster include sodium hydroxide, potassium hydroxide, sodium carbonate, sodium hydrogen carbonate, boric acid or a salt thereof (borax), hydrochloric acid, citric acid or a salt thereof (sodium citrate, sodium dihydrogen citrate). Etc.), phosphoric acid or a salt thereof (disodium hydrogen phosphate, potassium dihydrogen phosphate, etc.), acetic acid or a salt thereof (sodium acetate, ammonium acetate, etc.), tartaric acid or a salt thereof (sodium tartrate, etc.), and the like.
- Examples of the antioxidant include sodium bisulfite, dry sodium sulfite, sodium pyrosulfite, and concentrated mixed tocopherol.
- the content of the nucleic acid molecule of the present invention in the pharmaceutical composition of the present invention is, for example, about 0.1 to 100% by weight of the whole pharmaceutical composition.
- the pharmaceutical composition of the present invention is a liposome preparation
- the molar ratio of the nucleic acid molecule of the present invention to the liposome component is usually 1 / 100,000 to 1 / 10,000.
- the amount of the liposome encapsulating the nucleic acid molecule of the present invention contained in the liposome preparation is not particularly limited as long as the liposome particle does not aggregate and can exhibit a sufficient medicinal effect. 100mM.
- the dosage of the pharmaceutical agent of the present invention varies depending on the purpose of administration, administration method, type and size of ocular surface disease, and the situation of the administration subject (sex, age, weight, etc.).
- As a single dose of the nucleic acid of the present invention it is usually desirable to administer 0.01 to 1000 ⁇ g, preferably 0.05 to 100 ⁇ g, more preferably 0.1 to 50 ⁇ g, once to 10 times, preferably 5 to 10 times a day.
- Example 1 Prorenin gene or prorenin receptor gene expression inhibitory effect by single-stranded nucleic acid molecules in HCC1954 cells (1) Synthesis of single-stranded nucleic acid molecules The single-stranded nucleic acid molecules shown below were synthesized based on the phosphoramidite method. And synthesized with an ABI3900 nucleic acid synthesizer (trade name, Applied Biosystems). For the synthesis, EMM amidite (International Publication No. 2013/027843) was used as the RNA amidite (hereinafter the same). The deprotection of the amidite followed a conventional method. The synthesized single-stranded nucleic acid molecules were lyophilized after purification by HPLC.
- single-stranded nucleic acid molecules single-stranded nucleic acid molecules (PH-0001-hp, PH-0002-hp, PH-0003-hp, PH-0004) having the prorenin gene expression suppression sequence represented by SEQ ID NOs: 1 to 5 above.
- Lx is a linker region Lx, which has the following structural formula using L-proline diamide amidite.
- the underlined portion is a human prorenin gene or prorenin receptor gene expression suppression sequence.
- PH-0001-hp SEQ ID NO: 23
- CCUAUCUUCGACAACAUCAUCCC-Lx-GGGA UGAUGUUGUCGAAGAUAGGGG -3 ' PH-0002-hp SEQ ID NO: 24
- SEQ ID NO: 24 5'- GGAAUUUCCACUAUAUCAACCCC-Lx-GGGG UUGAUAUAGUGGAAAUUCCCU -3 ' PH-0003-hp
- SEQ ID NO: 25 5'- GGGAAUUUCCACUAUAUCAACCC-Lx-GGGU UGAUAUAGUGGAAAUUCCCUU -3 ' PH-0004-hp
- SEQ ID NO: 26 5'- CCUUCAUCCGAAAGUUCUACACC-Lx-GGUG UAGAACUUUCGGAUGAAGGUG -3 ' PH-0005-hp
- HCC1954 cells As cells, HCC1954 cells (ATCC) were used. As the medium, RPMI-1640 (Invitrogen) containing 10% FBS was used. The culture conditions were 37 ° C. and 5% CO 2 .
- the single-stranded nucleic acid molecule was transfected using the transfection reagent Lipofectamine RNAiMAX (Invitrogen) according to the protocol attached to the transfection reagent.
- the composition per well was set as follows, and transfection was performed.
- (A) is the transfection reagent
- (B) is Opti-MEM (Invitrogen)
- (C) is 20 ⁇ mol / L of the single-stranded nucleic acid molecule solution.
- the final concentration of the single-stranded nucleic acid molecule was 10 nmol / L.
- PCR was performed using the synthesized cDNA as a template, and the expression level of the prorenin gene, the expression level of the prorenin receptor gene, and the expression level of the GAPDH gene as an internal standard were measured.
- the expression level of the prorenin gene and the expression level of the prorenin receptor gene were corrected by the expression level of the GAPDH gene.
- the PCR used LightCycler480 SYBR Green I Master (Roche) as a reagent and LightCycler480 (Roche) as an instrument (hereinafter the same).
- the following primer sets were used for amplification of the prorenin gene, prorenin receptor gene and GAPDH gene, respectively.
- PCR primer set for prorenin gene (SEQ ID NO: 34) 5'- GCTTTCTCAGCCAGGACATC -3 ' (SEQ ID NO: 35) 5'- TGGGAGATGATGTTGTCGAA -3 ' PCR primer set for prorenin receptor gene (SEQ ID NO: 36) 5'-TCGTACCCTTTGGAGAATGC -3 ' (SEQ ID NO: 37) 5'-GAGCCAACTGCAAAACAACA-3 ' Primer set for GAPDH gene (SEQ ID NO: 38) 5'- GGAGAAGGCTGGGGCTCATTTGC -3 ' (SEQ ID NO: 39) 5'- TGGCCAGGGGTGCTAAGCAGTTG -3 '
- the expression level in the control (mock) cell is assumed to be 1, and the relative value of the expression level in each single-stranded nucleic acid molecule is calculated. It was.
- FIG. 2 shows the measurement results of the prorenin gene expression level
- FIG. The single-stranded nucleic acid molecule of the present invention showed strong gene expression suppression activity.
- Example 2 Inhibitory effect on expression of prorenin receptor gene
- SEQ ID NOs: 28 and 29 having human, mouse and rat prorenin receptor gene expression-suppressing sequences, and human and mouse prorenin receptors Regarding the single-stranded nucleic acid molecules represented by SEQ ID NOs: 30 to 32 having a gene expression suppressing sequence, the effect of suppressing the expression of the prorenin receptor gene in human, mouse and rat-derived cultured cells was confirmed.
- the single-stranded nucleic acid molecule was transfected using the transfection reagent Lipofectamine RNAiMAX (Invitrogen) according to the protocol attached to the transfection reagent.
- the composition per well was set as follows, and transfection was performed. In the following composition, (A) is the transfection reagent, (B) is Opti-MEM (Invitrogen), and (C) is 20 ⁇ mol / L of the single-stranded nucleic acid molecule solution. In the well, the final concentration of the single-stranded nucleic acid molecule was 0.5 nmol / L.
- cDNA was synthesized from RNA using SuperPrep® Cell® Lysis® & RT (Toyobo) according to the attached protocol. Then, as shown below, PCR was performed using the synthesized cDNA as a template, and the expression level of the prorenin receptor gene and the expression level of the HPRT1 gene as an internal standard were measured. The expression level of the prorenin receptor gene was corrected by the expression level of the HPRT1 gene.
- PCR primer set for human prorenin receptor gene (SEQ ID NO: 40) 5'- AGGCAGTGTCATTTCGTACC -3 ' (SEQ ID NO: 41) 5'-GCCTTCCCTACCATATACACTC -3 ' PCR primer set for human HPRT1 gene (SEQ ID NO: 42) 5'- ACCCCACGAAGTGTTGGATA -3 ' (SEQ ID NO: 43) 5'- AAGCAGATGGCCACAGAACT -3 ' PCR primer set for mouse prorenin receptor gene (SEQ ID NO: 44) 5'- TGGTCGTTCTCCTGTTCTTTC -3 ' (SEQ ID NO: 45) 5'-ACCCTGGCGATCTTAATATGC -3 ' PCR primer set for mouse HPRT1 gene
- the expression level in the cells of the control (mock) cells was taken as 1, and the relative value of the expression level in the cells into which each single-stranded nucleic acid molecule was introduced was determined.
- FIG. 4 shows the measurement results of human prorenin receptor gene expression levels
- FIG. 5 shows the results of mouse prorenin receptor gene expression levels
- FIG. 6 shows the measurement results of rat prorenin receptor gene expression levels.
- the single-stranded nucleic acid molecule of the present invention showed a strong gene expression suppressing effect.
- Example 3 Prorenin gene expression inhibitory effect Regarding the single-stranded nucleic acid molecules represented by SEQ ID NOs: 23 to 27 having the human prorenin gene expression inhibitory sequence, the effect of suppressing the expression of the prorenin gene in human-derived cultured cells was confirmed. .
- the single-stranded nucleic acid molecule was transfected using the transfection reagent Lipofectamine RNAiMAX (Invitrogen) according to the protocol attached to the transfection reagent.
- the composition per well was set as follows, and transfection was performed.
- (A) is the transfection reagent
- (B) is Opti-MEM (Invitrogen)
- (C) is 20 ⁇ mol / L of the single-stranded nucleic acid molecule solution.
- the final concentration of the single-stranded nucleic acid molecule was 0.5 nmol / L.
- PCR primer set for human HPRT1 gene (SEQ ID NO: 42) 5'- ACCCCACGAAGTGTTGGATA -3 ' (SEQ ID NO: 43) 5'- AAGCAGATGGCCACAGAACT -3 '
- the expression level in the cells of the control (mock) cells was taken as 1, and the relative value of the expression level in the cells into which each single-stranded nucleic acid molecule was introduced was determined.
- Example 4 Inflammatory inhibitory effect in endotoxin-induced uveitis model mouse A single-stranded nucleic acid molecule represented by SEQ ID NO: 30, having a suppressive sequence of human and mouse prorenin receptor gene expression, PH-0001-hm-pr Were confirmed to have inflammation-inhibiting effects in LPS-induced uveitis model mice.
- mice were euthanized by cervical dislocation, the retina was removed, and RNA was collected using TRIzol (Life technologies) according to the attached protocol.
- cDNA was synthesized from the RNA using GoScript Reverse Transcriptase Kit (Promega) according to the attached protocol.
- PCR was performed using the synthesized cDNA as a template, and the expression level of CCL2 / MCP-1, ICAM-1, IL-6, TNF- ⁇ gene and the expression level of Gapdh gene as an internal standard was measured. The expression level of each gene was corrected by the expression level of the Gapdh gene.
- PCR primer set for mouse CCL2 / MCP-1 gene (SEQ ID NO: 52) 5'-TTGGCTCAGCCAGATGCA -3 ' (SEQ ID NO: 53) 5'-CCTACTCATTGGGATCATCTTGC-3 ' PCR primer set for mouse ICAM-1 gene (SEQ ID NO: 54) 5'- CCTGTTTCCTGGCTCTGAAG -3 ' (SEQ ID NO: 55) 5'-GTCTGCTGAGACCCCTCTTG -3 ' PCR primer set for mouse IL-6 gene (SEQ ID NO: 56) 5'- CACAGAGGATACCACTCCCAACA -3 ' (SEQ ID NO: 57) 5'-TCCACGATTTCCCAGAGAAACA-3 ' (SEQ ID NO: 57) 5'-TCCACGATTTCCCAGAGAAACA-3 ' (SEQ ID NO: 57) 5'-TCCACGATTTCCCAGAGAAACA-3 ' PCR primer set for mouse TNF ⁇ gene (SEQ ID NO: 58)
- Example 5 Nuclease Resistance and Prorenin Receptor Protein Expression Suppressing Effect
- Nuclease resistance was confirmed for the single-stranded nucleic acid molecule represented by SEQ ID NO: 30 having human and mouse prorenin receptor gene expression suppressing sequences.
- the effect of suppressing the expression of prorenin receptor protein in cultured human-derived cells was confirmed by immunoblot analysis.
- the single-stranded nucleic acid molecule (1 nM) represented by SEQ ID NO: 30 was transfected using the transfection reagent Lipofectamine RNAiMAX Reagent (Life Technologies) according to the attached protocol. After transfection, the cells were cultured for 24 hours. Cells were collected 3, 6, 12, 18 and 24 hours after the start of culture. Immunoblot analysis was performed as follows. Cells collected in SDS buffer containing protease inhibitor cocktail (Roche) were lysed, proteins were separated by SDS-PAGE using a 10% gel, and transferred to a PVDF membrane (Merck Millipore). The membrane was soaked in TBS containing 5% skim milk for blocking and reacted with the primary antibody.
- an anti-prorenin receptor antibody (Sigma Aldrich) and an anti- ⁇ -actin antibody (Medical and Biological Laboratories) were used.
- Anti-mouse or anti-rabbit IgG antibody peroxidase conjugate (Jackson ImmunoResearch Laboratories) was used as a secondary antibody for chemiluminescence detection.
- Enhanced chemoluminescence (Western Lightning Ultra) was used for signal detection.
- a single-stranded nucleic acid molecule (Control-PshRNA) having the following structural formula was used.
- Lx has a structure represented by the formula (I-6a). (SEQ ID NO: 62) 5'- UACUAUUCGACACGCGAAGUUCC-Lx-GGAACUUCGCGUGUCGAAUAGUAUU -3 '
- FIG. 9A shows the results of nuclease resistance
- FIG. 9B shows the results of the effect of suppressing the expression of prorenin receptor protein by immunoblot analysis.
- the control ((P) RR-siRNA) was completely degraded by micrococcal nuclease after 5 minutes, but the single-stranded nucleic acid molecule represented by SEQ ID NO: 30 ((P) RR-PshRNA) was 30 minutes later. However, it was not degraded and showed nuclease resistance (FIG. 9A).
- the results of immunoblot analysis showed that the single-stranded nucleic acid molecule represented by SEQ ID NO: 30 ((P) RR-PshRNA) suppressed the expression of prorenin receptor protein (FIG. 9B).
- Example 6 Acute inflammation inhibitory effect in endotoxin-induced uveitis model mouse Acute inflammation inhibitory effect was confirmed for the single-stranded nucleic acid molecule represented by SEQ ID NO: 30 having human and mouse prorenin receptor gene expression inhibitory sequences. did. Using an LPS-induced uveitis model mouse as an acute inflammation model mouse, the number of leukocytes adhered to the retinal blood vessels and the number of leukocytes infiltrating into the vitreous cavity adjacent to the optic disc were measured. Moreover, in order to investigate the molecular mechanism by which the single-stranded nucleic acid molecule suppresses the cellular response, the expression level of the inflammatory cytokine gene was measured.
- the length of the photoreceptor outer segment is reduced because the inflammatory signal causes degradation of rhodopsin due to activation of the ubiquitin proteasome system, thereby shortening the photoreceptor outer segment.
- immunoblot analysis of rhodopsin were performed to examine the protective effect of photoreceptor cells by the single-stranded nucleic acid molecule.
- the single-stranded nucleic acid molecule represented by SEQ ID NO: 30 was dissolved in PBS so as to be 100 ⁇ M. After dissolution, 1 ⁇ L of a single-stranded nucleic acid molecule solution was administered into the vitreous body of a mouse (C57BL / 6J, 6-8 weeks old) (CLEA Japan) under pentobarbital anesthesia using a 33 gauge needle. As a control, the same amount of PBS or Control-PshRNA (SEQ ID NO: 62) dissolved in PBS to 100 ⁇ M was used.
- LPS Sigma-Aldrich
- SEQ ID NO: 30 the single-stranded nucleic acid molecule represented by SEQ ID NO: 30 or Control-PshRNA.
- SEQ ID NO: 30 the single-stranded nucleic acid molecule represented by SEQ ID NO: 30 or Control-PshRNA.
- RNA Isolate total RNA from cells using SuperPrep Cell Lysis & RT Kit for qPCR (TOYOBO) and from retinal tissue using TRIzol (Life Technologies) and GoScrip Reverse Transcriptase (Promega) and reverse using oligo dT primers
- the cDNA was synthesized by a photoreaction. Real-time quantitative PCR was performed using the synthesized cDNA as a template, and the expression levels of IL-6, CCL2 / MCP-1, ICAM-1, and TNF- ⁇ genes were measured. These genes are representative genes known to be commonly involved in both acute and chronic inflammation models. In addition, the expression levels of the prorenin receptor gene and the internal standard Gapdh gene were also measured.
- the expression level of each gene was corrected by the expression level of the Gapdh gene.
- the real-time quantitative PCR used GoTaq qPCR Master Mix (Promega) as a reagent and StepOne plus System (Life Technologies) as an instrument.
- the same primer set as that used in Example 4 was used for PCR of IL-6, CCL2 / MCP-1, ICAM-1, TNF- ⁇ , and Gapdh gene.
- the following primer sets were used for PCR of the prorenin receptor gene.
- PCR primer set for prorenin gene SEQ ID NO: 63
- SEQ ID NO: 64 5'-GCTACGTCTGGGATTCGATCT -3 '
- FITC-conjugated Con A was perfused. After removing the eyeball, a flat mount specimen of the retina was prepared. Flat mount specimens were visualized under a fluorescence microscope (BZ-9000, Keyence) and the total number of adherent leukocytes stained with Con A per retina was counted.
- FIG. 10 AD A micrograph of leukocytes adhered to the retina is shown in FIG. 10 AD (A and B are administered with a control, and C and D are administered with a single-stranded nucleic acid molecule represented by SEQ ID NO: 30). Arrows indicate leukocytes attached to the inflamed retinal vasculature. The scale bar is 100 ⁇ m.
- FIG. 10E The results of quantification of leukocytes adhered to the retina are shown in FIG. 10E.
- the single-stranded nucleic acid molecule represented by SEQ ID NO: 30 suppressed leukocyte adhesion in the retina of endotoxin-induced uveitis (FIG. 10 AE). Micrographs of leukocytes infiltrating the vitreous are shown in FIGS.
- FIG. 10F and G are administered with control and G is administered with a single-stranded nucleic acid molecule represented by SEQ ID NO: 30).
- Arrows indicate infiltrated leukocytes.
- the scale bar is 30 ⁇ m.
- the results of quantification of leukocytes infiltrating the vitreous are shown in FIG. 10H.
- Leukocyte infiltration forward of the optic nerve head was reduced by administration of the single-stranded nucleic acid molecule represented by SEQ ID NO: 30 (FIG. 10 FH).
- the measurement results of the expression level of the inflammatory cytokine gene are shown in FIG.
- IL-6, CCL2 / MCP-1, ICAM-1, and TNF- ⁇ gene expression levels are higher in endotoxin-induced uveitis (EIU) mice administered PBS or control (Control-PshRNA) It was higher than the expression level in untreated normal mice (Control) (FIG. 11 AD).
- EIU endotoxin-induced uveitis
- Control-PshRNA Control-PshRNA
- FIG. 11 AD In endotoxin-induced uveitis mice administered with the single-stranded nucleic acid molecule represented by SEQ ID NO: 30 ((P) RR-PshRNA), these inflammatory cytokines and prorenin receptors ((P) RR / Atp6ap2) ) Expression was significantly reduced (FIG. 11 AE).
- Figure 12 shows the results of measurement of photoreceptor outer segment length and rhodopsin immunoblot analysis (RPE for retinal pigment epithelium, OS for outer segment, IS for inner segment, ONL for outer granule layer, INL for inner granule layer) Is).
- RPE retinal pigment epithelium
- OS for outer segment
- IS for inner segment
- ONL for outer granule layer
- INL for inner granule layer
- Example 7 Chronic Inflammatory Inhibitory Effect in Streptozotocin-Induced Type 1 Diabetes Model Mice
- diabetic retinopathy has been considered an inflammatory disease. Therefore, using a streptozotocin-induced type 1 diabetes model mouse, the chronic inflammation inhibitory effect of the single-stranded nucleic acid molecule represented by SEQ ID NO: 30 was confirmed. Measurement of the expression level of inflammatory cytokine genes and quantification of leukocytes adhered to retinal blood vessels were performed.
- FIG. 13 AD A and B are controls administered, C and D are single-stranded nucleic acid molecules represented by SEQ ID NO: 30) Administration).
- the scale bar is 100 ⁇ m.
- FIG. 13E The result of the quantification of leukocytes adhered to the retina is shown in FIG. 13E.
- FIG. 13 FI Control indicates the expression level in normal mice not administered with PBS or nucleic acid).
- Example 8 Antiangiogenic Effect in Laser-Induced CNV Model Mice Regarding the single-stranded nucleic acid molecule represented by SEQ ID NO: 30 having the expression suppressing sequence of human and mouse prorenin receptor genes, angiogenesis in laser-induced CNV model mice The inhibitory effect was confirmed.
- Each eye was irradiated with four laser spots surrounding the optic nerve (180 mW, 75 ⁇ m, 100 ms) to produce CNV (choroidal neovascularization) model mice.
- CNV choroidal neovascularization
- 1 ⁇ L of a single-stranded nucleic acid molecule solution dissolved in PBS to 100 ⁇ M was administered into the vitreous using a 33 gauge needle.
- PBS or Control-PshRNA (SEQ ID NO: 62) dissolved in PBS to 100 ⁇ M was used as a control.
- the burst of Bruch's membrane was confirmed by the appearance of bubbles during laser injury. Vitreous hemorrhages, retinal hemorrhages, retinalized eyes were excluded from the study.
- the mice were euthanized by overdose of anesthesia, and the eyeballs were removed and fixed with 4% paraformaldehyde for 1 hour.
- the choroidal flat mount was prepared by flattening the retinal pigment epithelium-choroid complex by incising four locations radially.
- the choroid flat mount was soaked in PBS containing 5% goat serum and 1% Triton X-100, incubated at room temperature for 1 hour, and then incubated overnight at 4 ° C. with fluorescently labeled isolectin-B4.
- the choroid flat mount was observed with a fluorescence microscope (Biorevo, Keyence), and the area of CNV was measured using microscope software (BZ-II analyzer).
- the single-stranded nucleic acid molecule of the present invention can suppress the expression of a prorenin gene or a prorenin receptor gene. Therefore, the present invention is effective as a therapeutic agent for diseases caused by the expression of prorenin gene or prorenin receptor gene, such as uveitis and diabetic retinopathy.
- This application is based on Japanese Patent Application No. 2015-257713 filed in Japan (filing date: December 29, 2015), the contents of which are incorporated in full herein.
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Abstract
Description
上記のように、RAPSは2つの異なる作用を通じて、眼組織における炎症・血管新生に深く関与することが知られており、炎症・血管新生を伴う眼科疾患の治療戦略として、RAPSへの介入は重要な意味を持つと考えられる。
[1]プロレニン遺伝子またはプロレニン受容体遺伝子の発現を抑制する一本鎖核酸分子であって、
領域(X)、リンカー領域(Lx)および領域(Xc)のみからなり、
前記リンカー領域(Lx)が、ピロリジン骨格およびピペリジン骨格の少なくとも一方を含む非ヌクレオチド構造を有し、
前記領域(X)および前記領域(Xc)の一方が、下記配列番号1から5:
(配列番号1) 5'- UGAUGUUGUCGAAGAUAGGGG -3'
(配列番号2) 5'- UUGAUAUAGUGGAAAUUCCCU -3'
(配列番号3) 5'- UGAUAUAGUGGAAAUUCCCUU -3'
(配列番号4) 5'- UAGAACUUUCGGAUGAAGGUG -3'
(配列番号5) 5'- AUCAAACUCUGUGUAGAACUU -3'
で表されるプロレニン遺伝子の一部に相補的な配列、および下記配列番号6から11:
(配列番号6) 5'- UUCCAUUUCGGAAAACAACAG -3'
(配列番号7) 5'- AAUUUCCAUUUCGGAAAACAA -3'
(配列番号8) 5'- UUAUAUGCAAGGUUAUAGGGA -3'
(配列番号9) 5'- UAUAUGCAAGGUUAUAGGGAC -3'
(配列番号10) 5'- AAAAGGAACUGCAUUCUCCAA -3'
(配列番号11) 5'- UUAGUAUCCAUAUUAGCCCAU -3'
で表されるプロレニン受容体遺伝子の一部に相補的な配列から選ばれるいずれかのヌクレオチド配列中の、連続する少なくとも18ヌクレオチドからなるヌクレオチド配列を含む発現抑制配列を含み、
他方が、該発現抑制配列と相補的なヌクレオチド配列を含む、核酸分子。
[2]領域(X)、リンカー領域(Lx)および領域(Xc)が、3’側から5’側にかけてこの順序で配置され、前記領域(X)の塩基数(X)および前記領域(Xc)の塩基数(Xc)が、下記式(1)または式(2)の条件を満たす、上記[1]記載の核酸分子。
X>Xc ・・・(1)
X=Xc ・・・(2)
[3]前記領域(X)の塩基数(X)および前記領域(Xc)の塩基数(Xc)が、下記式(3)の条件を満たす、上記[2]記載の核酸分子。
X-Xc=1、2または3 ・・・(3)
[4]前記領域(Xc)の塩基数(Xc)が、19塩基~30塩基である、上記[1]から[3]のいずれかに記載の核酸分子。
[5]前記リンカー領域(Lx)が、下記式(I):で表わされる、上記[1]から[4]のいずれかに記載の核酸分子。
X1およびX2は、それぞれ独立して、H2、O、SまたはNHであり;
Y1およびY2は、それぞれ独立して、単結合、CH2、NH、OまたはSであり;
R3は、環A上のC-3、C-4、C-5またはC-6に結合する水素原子または置換基であり;
L1は、n個の原子からなるアルキレン鎖であり、ここで、アルキレン炭素原子上の水素原子は、OH、ORa、NH2、NHRa、NRaRb、SH、もしくはSRaで置換されても置換されていなくてもよく、または、
L1は、前記アルキレン鎖の一つ以上の炭素原子が、酸素原子で置換されたポリエーテル鎖であり、
ただし、Y1が、NH、OまたはSの場合、Y1に結合するL1の原子は炭素であり、OR1に結合するL1の原子は炭素であり、酸素原子同士は隣接せず;
L2は、m個の原子からなるアルキレン鎖であり、ここで、アルキレン炭素原子上の水素原子は、OH、ORc、NH2、NHRc、NRcRd、SHもしくはSRcで置換されても置換されていなくてもよく、または、
L2は、前記アルキレン鎖の一つ以上の炭素原子が、酸素原子で置換されたポリエーテル鎖であり、
ただし、Y2が、NH、OまたはSの場合、Y2に結合するL2の原子は炭素であり、OR2に結合するL2の原子は炭素であり、酸素原子同士は隣接せず;
Ra、Rb、RcおよびRdは、それぞれ独立して、置換基または保護基であり;
lは、1または2であり;
mは、0~30の範囲の整数であり;
nは、0~30の範囲の整数であり;
環Aは、前記環A上のC-2以外の1個の炭素原子が、窒素、酸素または硫黄で置換されてもよく、
前記環A内に、炭素-炭素二重結合または炭素-窒素二重結合を含んでもよく、
前記領域(Xc)および前記領域(X)は、それぞれ、-OR1-または-OR2-を介して、前記リンカー領域(Lx)に結合し、
ここで、R1およびR2は、存在しても存在しなくてもよく、存在する場合、R1およびR2は、それぞれ独立して、ヌクレオチド残基または前記構造(I)である。
[6]前記リンカー領域(Lx)が、下記式(I-4a)または(I-6a)で表わされる、上記[1]から[5]のいずれかに記載の核酸分子。
[8]少なくとも1つの修飾された残基を含む、上記[1]から[7]のいずれかに記載の核酸分子。
[9]標識物質を含む、上記[1]から[8]のいずれか一項に記載の核酸分子。
[10]安定同位体を含む、上記[1]から[9]のいずれかに記載の核酸分子。
[11]塩基数の合計が、38塩基以上である、上記[1]から[10]のいずれかに記載の核酸分子。
[12]下記配列番号23から33で表されるいずれかの塩基配列からなる、上記[1]から[11]のいずれかに記載の核酸分子。
(配列番号23)
5’- CCUAUCUUCGACAACAUCAUCCC-Lx-GGGAUGAUGUUGUCGAAGAUAGGGG -3’
(配列番号24)
5’- GGAAUUUCCACUAUAUCAACCCC-Lx-GGGGUUGAUAUAGUGGAAAUUCCCU -3’
(配列番号25)
5’- GGGAAUUUCCACUAUAUCAACCC-Lx-GGGUUGAUAUAGUGGAAAUUCCCUU -3’
(配列番号26)
5’- CCUUCAUCCGAAAGUUCUACACC-Lx-GGUGUAGAACUUUCGGAUGAAGGUG -3’
(配列番号27)
5’- GUUCUACACAGAGUUUGAUCGCC-Lx-GGCGAUCAAACUCUGUGUAGAACUU -3’
(配列番号28)
5’- GUUGUUUUCCGAAAUGGAAAUCC-Lx-GGAUUUCCAUUUCGGAAAACAACAG -3’
(配列番号29)
5’- GUUUUCCGAAAUGGAAAUUGGCC-Lx-GGCCAAUUUCCAUUUCGGAAAACAA -3’
(配列番号30)
5’- CCUAUAACCUUGCAUAUAAGUCC-Lx-GGACUUAUAUGCAAGGUUAUAGGGA -3’
(配列番号31)
5’- CCCUAUAACCUUGCAUAUAAGCC-Lx-GGCUUAUAUGCAAGGUUAUAGGGAC -3’
(配列番号32)
5’- GGAGAAUGCAGUUCCUUUUAGCC-Lx-GGCUAAAAGGAACUGCAUUCUCCAA -3’
(配列番号33)
5’- GGGCUAAUAUGGAUACUAAAACC-Lx-GGUUUUAGUAUCCAUAUUAGCCCAU -3’
[13]上記[1]から[12]のいずれかに記載の核酸分子を含む、プロレニン遺伝子またはプロレニン受容体遺伝子の発現抑制剤。
[14]上記[1]から[12]のいずれかに記載の核酸分子を含む医薬。
[15]上記[1]から[12]のいずれかに記載の核酸分子を含む、眼科疾患の治療剤。
[16]眼科疾患が、糖尿病網膜症、ぶどう膜炎および加齢黄斑変性からなる群より選択される、上記[15]記載の剤。
[17]眼科疾患が、糖尿病網膜症、ぶどう膜炎、加齢黄斑変性、および緑内障からなる群より選択される、上記[15]記載の剤。
[18]プロレニン遺伝子またはプロレニン受容体遺伝子の発現を抑制する方法であって、上記[1]から[12]のいずれかに記載の核酸分子を使用することを特徴とする、方法。
[19]前記核酸分子を、細胞、組織または器官に投与する工程を含む、上記[18]記載の方法。
[20]前記投与がin vitroで行われる、上記[19]記載の方法。
[21]プロレニン遺伝子またはプロレニン受容体遺伝子の発現抑制における使用のための、上記[1]から[12]のいずれかに記載の核酸分子。
[22]プロレニン遺伝子またはプロレニン受容体遺伝子の発現抑制剤の製造のための、上記[1]から[12]のいずれかに記載の核酸分子の使用。
(1)発現抑制配列および相補配列
本発明の核酸分子は、前述のように、プロレニン遺伝子またはプロレニン受容体遺伝子の発現を抑制する一本鎖核酸分子であって、下記配列番号1から5で表されるプロレニン遺伝子の一部に相補的な配列および下記配列番号6から11で表されるプロレニン受容体遺伝子の一部に相補的な配列から選ばれるいずれかのヌクレオチド配列中、連続する少なくとも18ヌクレオチドからなるヌクレオチド配列(「rヌクレオチド配列」という)を含む、プロレニン遺伝子またはプロレニン受容体遺伝子の発現抑制配列を含むことを特徴とする。
(配列番号1) 5'- UGAUGUUGUCGAAGAUAGGGG -3'
(配列番号2) 5'- UUGAUAUAGUGGAAAUUCCCU -3'
(配列番号3) 5'- UGAUAUAGUGGAAAUUCCCUU -3'
(配列番号4) 5'- UAGAACUUUCGGAUGAAGGUG -3'
(配列番号5) 5'- AUCAAACUCUGUGUAGAACUU -3'
(配列番号6) 5'- UUCCAUUUCGGAAAACAACAG -3'
(配列番号7) 5'- AAUUUCCAUUUCGGAAAACAA -3'
(配列番号8) 5'- UUAUAUGCAAGGUUAUAGGGA -3'
(配列番号9) 5'- UAUAUGCAAGGUUAUAGGGAC -3'
(配列番号10) 5'- AAAAGGAACUGCAUUCUCCAA -3'
(配列番号11) 5'- UUAGUAUCCAUAUUAGCCCAU -3'
(配列番号12) 5'- CCUAUCUUCGACAACAUCAUC -3'
(配列番号13) 5'- GGAAUUUCCACUAUAUCAACC -3'
(配列番号14) 5'- GGGAAUUUCCACUAUAUCAAC -3'
(配列番号15) 5'- CCUUCAUCCGAAAGUUCUACA -3'
(配列番号16) 5'- GUUCUACACAGAGUUUGAUCG -3'
(配列番号17) 5'- GUUGUUUUCCGAAAUGGAAAU -3'
(配列番号18) 5'- GUUUUCCGAAAUGGAAAUUGG -3'
(配列番号19) 5'- CCUAUAACCUUGCAUAUAAGU -3'
(配列番号20) 5'- CCCUAUAACCUUGCAUAUAAG -3'
(配列番号21) 5'- GGAGAAUGCAGUUCCUUUUAG -3'
(配列番号22) 5'- GGGCUAAUAUGGAUACUAAAA -3'
本発明の核酸分子は、前記発現抑制配列を含む領域と、前記相補配列を含む領域とが、リンカー領域を介して間接的に連結している。前記発現抑制配列を含む領域と前記相補配列を含む領域との連結順序は、特に制限されず、例えば、前記発現抑制配列の5'末端側と、前記相補配列の3'末端側とがリンカー領域を介して連結してもよく、あるいは、前記発現抑制配列の3'末端側と前記相補配列の5'末端側とがリンカー領域を介して連結してもよい。好ましくは前者である。
(ヘアピン型一本鎖核酸分子)
好ましい一実施態様において、本発明の一本鎖核酸分子は、5'側領域および3'側領域が、互いにアニーリングして二本鎖構造(ステム構造)を形成する分子である。これは、shRNA(small hairpin RNAまたはshort hairpin RNA)の形態とも言える。shRNAは、ヘアピン構造をとっており、一般的に、一つのステム領域と一つのループ領域とを有する。
前記発現抑制配列を含む領域(X又はXcの一方)が前記リンカー領域(Lx)側に付加配列を有する場合、前記相補配列を含む領域(X又はXcの他方)も、前記リンカー領域(Lx)側に該付加配列と相補的な配列を含む。
X>Xc ・・・(1)
X-Xc=1~10、好ましくは1、2または3、
より好ましくは1または2 ・・・(4)
X=Xc ・・・(2)
前記核酸分子において、前記リンカー領域(Lx)を除くヌクレオチド数の合計は、下限が、例えば、36ヌクレオチドであり、好ましくは38ヌクレオチドである。その上限は、例えば、100ヌクレオチドであり、好ましくは80ヌクレオチドであり、より好ましくは60ヌクレオチドであり、さらに好ましくは50ヌクレオチドである。全長のヌクレオチド数の具体例は、例えば、36~100ヌクレオチド、好ましくは38~80ヌクレオチド、より好ましくは42~60ヌクレオチド、さらに好ましくは42~50ヌクレオチドである。
X1およびX2は、それぞれ独立して、H2、O、SまたはNHであり;
Y1およびY2は、それぞれ独立して、単結合、CH2、NH、OまたはSであり;
R3は、環A上のC-3、C-4、C-5またはC-6に結合する水素原子または置換基であり、
L1は、n個の原子からなるアルキレン鎖であり、ここで、アルキレン炭素原子上の水素原子は、OH、ORa、NH2、NHRa、NRaRb、SH、もしくはSRaで置換されても置換されていなくてもよく、または、
L1は、前記アルキレン鎖の一つ以上の炭素原子が、酸素原子で置換されたポリエーテル鎖であり、
ただし、Y1が、NH、OまたはSの場合、Y1に結合するL1の原子は炭素であり、OR1に結合するL1の原子は炭素であり、酸素原子同士は隣接せず;
L2は、m個の原子からなるアルキレン鎖であり、ここで、アルキレン炭素原子上の水素原子は、OH、ORc、NH2、NHRc、NRcRd、SHもしくはSRcで置換されても置換れていなくてもよく、または、
L2は、前記アルキレン鎖の一つ以上の炭素原子が、酸素原子で置換されたポリエーテル鎖であり、
ただし、Y2が、NH、OまたはSの場合、Y2に結合するL2の原子は炭素であり、OR2に結合するL2の原子は炭素であり、酸素原子同士は隣接せず;
Ra、Rb、RcおよびRdは、それぞれ独立して、置換基または保護基であり;
lは、1または2であり;
mは、0~30の範囲の整数であり;
nは、0~30の範囲の整数であり;
環Aは、前記環A上のC-2以外の1個の炭素原子が、窒素、酸素、硫黄で置換されてもよく、
前記環A内に、炭素-炭素二重結合または炭素-窒素二重結合を含んでもよく、
前記領域(Xc)および前記領域(X)は、それぞれ、-OR1-または-OR2-を介して、前記リンカー領域(Lx)に結合し、
ここで、R1およびR2は、存在しても存在しなくてもよく、存在する場合、R1およびR2は、それぞれ独立して、ヌクレオチド残基または前記構造(I)である。
条件(1)
前記領域(Xc)は、-OR2-を介して、前記領域(X)は、-OR1-を介して、前記式(I)の構造と結合する。
条件(2)
前記領域(Xc)は、-OR1-を介して、前記領域(X)は、-OR2-を介して、前記式(I)の構造と結合する。
(配列番号23)
5’- CCUAUCUUCGACAACAUCAUCCC-Lx-GGGAUGAUGUUGUCGAAGAUAGGGG -3’
(配列番号24)
5’- GGAAUUUCCACUAUAUCAACCCC-Lx-GGGGUUGAUAUAGUGGAAAUUCCCU -3’
(配列番号25)
5’- GGGAAUUUCCACUAUAUCAACCC-Lx-GGGUUGAUAUAGUGGAAAUUCCCUU -3’
(配列番号26)
5’- CCUUCAUCCGAAAGUUCUACACC-Lx-GGUGUAGAACUUUCGGAUGAAGGUG -3’
(配列番号27)
5’- GUUCUACACAGAGUUUGAUCGCC-Lx-GGCGAUCAAACUCUGUGUAGAACUU -3’
(配列番号28)
5’- GUUGUUUUCCGAAAUGGAAAUCC-Lx-GGAUUUCCAUUUCGGAAAACAACAG -3’
(配列番号29)
5’- GUUUUCCGAAAUGGAAAUUGGCC-Lx-GGCCAAUUUCCAUUUCGGAAAACAA -3’
(配列番号30)
5’- CCUAUAACCUUGCAUAUAAGUCC-Lx-GGACUUAUAUGCAAGGUUAUAGGGA -3’
(配列番号31)
5’- CCCUAUAACCUUGCAUAUAAGCC-Lx-GGCUUAUAUGCAAGGUUAUAGGGAC -3’
(配列番号32)
5’- GGAGAAUGCAGUUCCUUUUAGCC-Lx-GGCUAAAAGGAACUGCAUUCUCCAA -3’
(配列番号33)
5’- GGGCUAAUAUGGAUACUAAAACC-Lx-GGUUUUAGUAUCCAUAUUAGCCCAU -3’
(式中、Lxは前記いずれかのリンカー領域を表す。好ましくは、Lxは上記式(I)で表わされる構造を有し、より好ましくは、上記式(I-1)~(I-9)のいずれかで表わされる構造を有し、さらに好ましくは、上記式(I-4a)又は(I-6a)で表わされる構造を有し、特に好ましくは、上記式(I-6a)で表わされる構造を有する。)
中でも、配列番号30~32で表わされるヌクレオチド配列からなる一本鎖核酸分子が特に好ましい。
(1)非修飾ヌクレオチド残基
(2)修飾ヌクレオチド残基
(3)非修飾ヌクレオチド残基および修飾ヌクレオチド残基
(1)非修飾ヌクレオチド残基
(2)修飾ヌクレオチド残基
(3)非修飾ヌクレオチド残基および修飾ヌクレオチド残基
(4)非ヌクレオチド残基
(5)非ヌクレオチド残基および非修飾ヌクレオチド残基
(6)非ヌクレオチド残基および修飾ヌクレオチド残基
(7)非ヌクレオチド残基、非修飾ヌクレオチド残基および修飾ヌクレオチド残基
前記ヌクレオチド残基は、例えば、構成要素として、糖、塩基およびリン酸を含む。前記ヌクレオチド残基は、前述のように、例えば、リボヌクレオチド残基およびデオキシリボヌクレオチド残基があげられる。前記リボヌクレオチド残基は、例えば、糖としてリボース残基を有し、塩基として、アデニン(A)、グアニン(G)、シトシン(C)およびウラシル(U)を有し、前記デオキシリボース残基は、例えば、糖としてデオキシリボース残基を有し、塩基として、アデニン(A)、グアニン(G)、シトシン(C)およびチミン(T)を有する。
本発明の核酸分子の合成方法は、特に制限されず、従来公知の方法が採用できる。前記合成方法は、例えば、遺伝子工学的手法による合成法、化学合成法等があげられる。遺伝子工学的手法は、例えば、インビトロ転写合成法、ベクターを用いる方法、PCRカセットによる方法があげられる。前記ベクターは、特に制限されず、プラスミド等の非ウイルスベクター、ウイルスベクター等があげられる。前記化学合成法は、特に制限されず、例えば、ホスホロアミダイト法およびH-ホスホネート法等があげられる。前記化学合成法は、例えば、市販の自動核酸合成機を使用可能である。前記化学合成法は、一般に、アミダイトが使用される。前記アミダイトは、特に制限されず、市販のアミダイトとして、例えば、RNA Phosphoramidites(2’-O-TBDMSi、商品名、三千里製薬)、ACEアミダイトおよびTOMアミダイト、CEEアミダイト、CEMアミダイト、TEMアミダイト等があげられる。
本発明の核酸分子が、非修飾リボヌクレオチド残基のみで構成される場合、該核酸分子の前駆体として、該核酸分子を発現可能な状態でコードするベクター(本発明の発現ベクター)の形態で提供することもできる。本発明の発現ベクターは、前記本発明の核酸分子をコードするDNAを標的細胞内で機能的なプロモーターの制御下に含むことを特徴とする。本発明の発現ベクターは、前記DNAと機能的に連結されたプロモーターを含むことが特徴であり、その他の構成は、何ら制限されない。前記DNAを挿入するベクターは、特に制限されず、例えば、一般的なベクターが使用でき、ウイルスベクターおよび非ウイルスベクター等があげられる。前記非ウイルスベクターは、例えば、プラスミドベクターがあげられる。該発現ベクターを、自体公知の遺伝子導入法を用いて、標的細胞(前記プロレニン遺伝子およびプロレニン受容体遺伝子を有する細胞)に導入することにより、該細胞内でのプロレニン遺伝子またはプロレニン受容体遺伝子の発現を抑制することができる。
本発明の発現抑制剤は、プロレニン遺伝子またはプロレニン受容体遺伝子の発現を抑制する製剤であって、前記本発明の核酸分子を有効成分とすることを特徴とする。
プロレニン-プロレニン受容体は、組織RAS活性化とRAS非依存的な細胞内シグナル活性化という異なる2つの作用(包括して「受容体結合プロレニン系(RAPS)」という)を通じて、眼組織における炎症・血管新生に深く関与している。従って、本発明の核酸分子を有効成分とする医薬は、RAPSを抑制することにより、RAPSが関与する眼科疾患(例えば、糖尿病網膜症、ぶどう膜炎、加齢黄斑変性等)の治療に有効である。また、本発明の核酸分子を有効成分とする医薬は、糖尿病網膜症、ぶどう膜炎、加齢黄斑変性、緑内障の治療に有効である。ここで「治療」とは、疾患の予防及び発症遅延、疾患の改善、並びに予後の改善の包含する意味で用いる。
緩衝剤としては、例えば、リン酸緩衝剤、ホウ酸緩衝剤、クエン酸緩衝剤、酒石酸緩衝剤、酢酸緩衝剤、アミノ酸などが挙げられる。
等張化剤としては、ソルビトール、グルコース、マンニトールなどの糖類、グリセリン、プロピレングリコールなどの多価アルコール類、塩化ナトリウムなどの塩類、ホウ酸などが挙げられる。
溶解補助剤としては、ポリオキシエチレンソルビタンモノオレート(例えば、ポリソルベート80)、ポリオキシエチレン硬化ヒマシ油、チロキサポール、プルロニックなどの非イオン性界面活性剤、グリセリン、マクロゴールなどの多価アルコールなどが挙げられる。
防腐剤としては、例えば、塩化ベンザルコニウム、塩化ベンゼトニウム、塩化セチルピリジニウムなどの第四級アンモニウム塩類、パラオキシ安息香酸メチル、パラオキシ安息香酸エチル、パラオキシ安息香酸プロピル、パラオキシ安息香酸ブチルなどのパラオキシ安息香酸エステル類、ベンジルアルコール、ソルビン酸およびその塩(ナトリウム塩、カリウム塩など)、チメロサール(商品名)、クロロブタノール、デヒドロ酢酸ナトリウムなどが挙げられる。
粘性基剤としては、ポリビニルピロリドン、ポリエチレングリコール、ポリビニルアルコールなどの水溶性高分子、ヒドロキシエチルセルロース、メチルセルロース、ヒドロキシプロピルメチルセルロース、カルボキシメチルセルロースナトリウムなどのセルロース類などが挙げられる。
キレート剤としては、エデト酸ナトリウム、クエン酸などが挙げられる。
清涼化剤としては、l-メントール、ボルネオール、カンフル、ユーカリ油などが挙げられる。
pH調整剤としては、例えば、水酸化ナトリウム、水酸化カリウム、炭酸ナトリウム、炭酸水素ナトリウム、ホウ酸またはその塩(ホウ砂)、塩酸、クエン酸またはその塩(クエン酸ナトリウム、クエン酸二水素ナトリウム等)、リン酸またはその塩(リン酸水素二ナトリウム、リン酸二水素カリウム等)、酢酸またはその塩(酢酸ナトリウム、酢酸アンモニウム等)、酒石酸またはその塩(酒石酸ナトリウム等)等が挙げられる。
抗酸化剤としては、例えば、亜硫酸水素ナトリウム、乾燥亜硫酸ナトリウム、ピロ亜硫酸ナトリウム、濃縮混合トコフェロール等が挙げられる。
本発明の医薬組成物がリポソーム製剤の場合、リポソーム構成成分に対する本発明の核酸分子のモル比は、通常1/100,000~1/10,000である。また、リポソーム製剤中に含有される本発明の核酸分子を封入したリポソームの量は、リポソーム粒子が凝集しない程度で、かつ十分な薬効を発揮し得る量であれば特に制限はなく、通常10~100mMである。
(1)一本鎖核酸分子の合成
以下に示す一本鎖核酸分子を、ホスホロアミダイト法に基づき、ABI3900核酸合成機(商品名、アプライドバイオシステムズ)により合成した。前記合成には、RNAアミダイトとして、EMMアミダイト(国際公開第2013/027843号)を用いた(以下、同様)。前記アミダイトの脱保護は、定法に従った。合成した一本鎖核酸分子は、HPLCによる精製後、それぞれ凍結乾燥した。
PH-0001-h-p(配列番号23)
5'- CCUAUCUUCGACAACAUCAUCCC-Lx-GGGAUGAUGUUGUCGAAGAUAGGGG-3'
PH-0002-h-p(配列番号24)
5'- GGAAUUUCCACUAUAUCAACCCC-Lx-GGGGUUGAUAUAGUGGAAAUUCCCU-3'
PH-0003-h-p(配列番号25)
5'- GGGAAUUUCCACUAUAUCAACCC-Lx-GGGUUGAUAUAGUGGAAAUUCCCUU-3'
PH-0004-h-p(配列番号26)
5'- CCUUCAUCCGAAAGUUCUACACC-Lx-GGUGUAGAACUUUCGGAUGAAGGUG-3'
PH-0005-h-p(配列番号27)
5'- GUUCUACACAGAGUUUGAUCGCC-Lx-GGCGAUCAAACUCUGUGUAGAACUU-3'
PH-0001-hmr-pr(配列番号28)
5'- GUUGUUUUCCGAAAUGGAAAUCC-Lx-GGAUUUCCAUUUCGGAAAACAACAG-3'
PH-0002-hmr-pr(配列番号29)
5'- GUUUUCCGAAAUGGAAAUUGGCC-Lx-GGCCAAUUUCCAUUUCGGAAAACAA-3'
PH-0001-hm-pr(配列番号30)
5'- CCUAUAACCUUGCAUAUAAGUCC-Lx-GGACUUAUAUGCAAGGUUAUAGGGA-3'
PH-0002-hm-pr(配列番号31)
5'- CCCUAUAACCUUGCAUAUAAGCC-Lx-GGCUUAUAUGCAAGGUUAUAGGGAC-3'
PH-0003-hm-pr(配列番号32)
5'- GGAGAAUGCAGUUCCUUUUAGCC-Lx-GGCUAAAAGGAACUGCAUUCUCCAA-3'
PH-0001-h-pr(配列番号33)
5'- GGGCUAAUAUGGAUACUAAAACC-Lx-GGUUUUAGUAUCCAUAUUAGCCCAU-3'
前記各一本鎖核酸分子を、20μmol/Lとなるように、注射用蒸留水(大塚製薬)に溶解した。
プロレニン遺伝子用PCRプライマーセット
(配列番号34) 5'- GCTTTCTCAGCCAGGACATC -3'
(配列番号35) 5'- TGGGAGATGATGTTGTCGAA -3'
プロレニン受容体遺伝子用PCRプライマーセット
(配列番号36) 5'- TCGTACCCTTTGGAGAATGC -3'
(配列番号37) 5'- GAGCCAACTGCAAAACAACA -3'
GAPDH遺伝子用プライマーセット
(配列番号38) 5'- GGAGAAGGCTGGGGCTCATTTGC -3'
(配列番号39) 5'- TGGCCAGGGGTGCTAAGCAGTTG -3'
プロレニン遺伝子発現量の測定結果を図2、プロレニン受容体遺伝子発現量の測定結果を図3に示す。本発明の一本鎖核酸分子は、強い遺伝子発現抑制活性を示した。
ヒト、マウスおよびラットプロレニン受容体遺伝子の発現抑制配列を有する配列番号28および29で表される一本鎖核酸分子と、ヒトおよびマウスプロレニン受容体遺伝子の発現抑制配列を有する配列番号30~32で表される一本鎖核酸分子について、ヒト、マウスおよびラット由来培養細胞におけるプロレニン受容体遺伝子の発現抑制効果を確認した。
細胞は、ヒト由来hTERT-RPE細胞(ATCC)、マウス由来Neuro-2a細胞(ECACC)、ラットRat-1細胞(ATCC)を使用した。培地は各々、10%FBSを含むDMEM/F12、E-MEM、DMEM培地(和光純薬)を使用した。培養条件は、37℃、5%CO2下とした。
ヒトプロレニン受容体遺伝子用PCRプライマーセット
(配列番号40) 5'- AGGCAGTGTCATTTCGTACC -3'
(配列番号41) 5'- GCCTTCCCTACCATATACACTC -3'
ヒトHPRT1遺伝子用PCRプライマーセット
(配列番号42) 5'- ACCCCACGAAGTGTTGGATA -3'
(配列番号43) 5'- AAGCAGATGGCCACAGAACT -3'
マウスプロレニン受容体遺伝子用PCRプライマーセット
(配列番号44) 5'- TGGTCGTTCTCCTGTTCTTTC -3'
(配列番号45) 5'- ACCCTGGCGATCTTAATATGC -3'
マウスHPRT1遺伝子用PCRプライマーセット
(配列番号46) 5'- CAAACTTTGCTTTCCCTGGT -3'
(配列番号47) 5'- CAAGGGCATATCCAACAACA -3'
ラットプロレニン受容体遺伝子用PCRプライマーセット
(配列番号48) 5'- TGTGGGCAACCTATTCCACC -3'
(配列番号49) 5'- AGCTGACGCAATGTGACTGA -3'
ラットHPRT1遺伝子用PCRプライマーセット
(配列番号50) 5'- GCAGACTTTGCTTTCCTTGG -3'
(配列番号51) 5'- TCCACTTTCGCTGATGACAC -3'
ヒトプロレニン受容体遺伝子発現量の測定結果を図4、マウスプロレニン受容体遺伝子の発現量の結果を図5、ラットプロレニン受容体遺伝子発現量の測定結果を図6に示す。各細胞において、本発明の一本鎖核酸分子はいずれも強い遺伝子発現抑制効果を示した。
ヒトプロレニン遺伝子の発現抑制配列を有する配列番号23から27で表される一本鎖核酸分子について、ヒト由来培養細胞におけるプロレニン遺伝子の発現抑制効果を確認した。
細胞は、ヒト由来hTERT-RPE細胞(ATCC)を使用した。培地は、10%FBSを含むDMEM/F12を使用した。培養条件は、37℃、5%CO2下とした。
ヒトHPRT1遺伝子用PCRプライマーセット
(配列番号42) 5’- ACCCCACGAAGTGTTGGATA -3’
(配列番号43) 5’- AAGCAGATGGCCACAGAACT -3’
結果を図7に示す。本発明の一本鎖核酸分子は、いずれも強い遺伝子発現抑制効果を示した。
ヒトおよびマウスプロレニン受容体遺伝子の発現抑制配列を有する配列番号30で表される一本鎖核酸分子、PH-0001-hm-prについて、LPS誘発ぶどう膜炎発症モデルマウスにおける炎症抑制効果を確認した。
前記一本鎖核酸分子を30、100、300μMとなるようにPBSに溶解した。溶解後、各濃度の一本鎖核酸分子溶液1μLを、33ゲージ注射針を用いてペントバルビタール麻酔下のマウス硝子体内に投与した。ネガティブコントロールとして、同量のPBSを用いた。各投与群において、6匹の雄マウス(C57BL/6J、6-8週齢)を使用した。一本鎖核酸分子投与24時間後、100μLのPBSに溶解したLPS(0.2mg)を腹腔内投与した。
LPS投与6時間後、マウスを頸椎脱臼により安楽死させ、網膜を摘出し、TRIzol(Life technologies)を用い、添付のプロトコールに従いRNAを回収した。次に、GoScript Reverse Transcriptase Kit(Promega)を用い、添付のプロトコールに従って、前記RNAからcDNAを合成した。そして、以下に示すように、合成した前記cDNAを鋳型としてPCRを行い、CCL2/MCP-1、ICAM-1、IL-6、TNF-α遺伝子の発現量および内部標準であるGapdh遺伝子の発現量を測定した。前記各遺伝子の発現量は、前記Gapdh遺伝子の発現量により補正した。
マウスCCL2/MCP-1遺伝子用PCRプライマーセット
(配列番号52) 5’- TTGGCTCAGCCAGATGCA -3’
(配列番号53) 5’- CCTACTCATTGGGATCATCTTGC -3’
マウスICAM-1遺伝子用PCRプライマーセット
(配列番号54) 5’- CCTGTTTCCTGGCTCTGAAG -3’
(配列番号55) 5’- GTCTGCTGAGACCCCTCTTG -3’
マウスIL-6遺伝子用PCRプライマーセット
(配列番号56) 5’- CACAGAGGATACCACTCCCAACA -3’
(配列番号57) 5’- TCCACGATTTCCCAGAGAAACA -3’
マウスTNFα遺伝子用PCRプライマーセット
(配列番号58) 5’- GGTGCCTATGTCTCAGCCTCTT -3’
(配列番号59) 5’- CGATCACCCCGAAGTTCAGTA -3’
マウスGapdh遺伝子用PCRプライマーセット
(配列番号60) 5’- AGGTCGGTGTGAACGGATTTG -3’
(配列番号61) 5’- TGTAGACCATGTAGTTGAGGTCA -3
(3)結果
結果を図8に示す。各群において、配列番号30で表される一本鎖核酸分子、PH-0001-hm-prは炎症性サイトカイン遺伝子発現に対して抑制効果を示した。すなわち、本発明の一本鎖核酸分子は、プロレニン受容体遺伝子発現の抑制を介して、ぶどう膜炎における炎症の発症を抑制することが示唆される。
ヒトおよびマウスプロレニン受容体遺伝子の発現抑制配列を有する配列番号30で表される一本鎖核酸分子について、ヌクレアーゼ耐性を確認した。また、ヒト由来培養細胞におけるプロレニン受容体タンパク質の発現抑制効果をイムノブロット分析により確認した。
0.5ユニットのミクロコッカスヌクレアーゼ(タカラバイオ)の存在下で、配列番号30で表される一本鎖核酸分子を37℃でインキュベートした。反応開始5、15、および30分後に反応溶液にEDTA溶液を加えて反応を停止させ、15% TBEゲルを用いて電気泳動を行い、ゲルをSYBR safe(Life Technologies)で染色した。コントロールとして、センス鎖が配列番号19で表される塩基配列、アンチセンス鎖が配列番号8で表される塩基配列である、二本鎖核酸分子((P)RR-siRNA)を用いた。
細胞は、ヒト網膜色素上皮細胞(RPE、hTERT-RPE1)(ATCC)を使用した。培地は10%FBS(Life Technologies)を含むDMEM/F12(和光純薬)を使用した。培養条件は、37℃、5%CO2下とした。
(配列番号62)
5’- UACUAUUCGACACGCGAAGUUCC-Lx-GGAACUUCGCGUGUCGAAUAGUAUU -3’
ヌクレアーゼ耐性の結果を図9A、イムノブロット分析によるプロレニン受容体タンパク質の発現抑制効果の結果を図9Bに示す。コントロール((P)RR-siRNA)は、ミクロコッカスヌクレアーゼによって5分後に完全に分解されたが、配列番号30で表される一本鎖核酸分子((P)RR-PshRNA)は、30分後でも分解されず、ヌクレアーゼ耐性を示した(図9 A)。また、イムノブロット分析の結果より、配列番号30で表される一本鎖核酸分子((P)RR-PshRNA)がプロレニン受容体タンパク質の発現を抑制することが示された(図9 B)。
ヒトおよびマウスプロレニン受容体遺伝子の発現抑制配列を有する配列番号30で表される一本鎖核酸分子について、急性炎症抑制効果を確認した。急性炎症モデルマウスとしてLPS誘発ぶどう膜炎発症モデルマウスを用い、網膜血管に接着した白血球数および視神経乳頭に隣接する硝子体腔に浸潤した白血球数を測定した。また、当該一本鎖核酸分子が細胞応答を抑制する分子メカニズムを調べるために、炎症性サイトカイン遺伝子の発現量を測定した。さらに、エンドトキシン誘発ぶどう膜炎モデルマウスでは、ユビキチン プロテアソーム系の活性化に起因して炎症性シグナルがロドプシンの分解を引き起こし、それにより視細胞外節が短くなることから、視細胞外節の長さの測定およびロドプシンのイムノブロット分析を行い、当該一本鎖核酸分子による視細胞の保護効果を調べた。
配列番号30で表される一本鎖核酸分子を100μMとなるようにPBSに溶解した。溶解後、一本鎖核酸分子溶液1μLを、33ゲージ注射針を用いてペントバルビタール麻酔下のマウス(C57BL/6J、6-8週齢)(CLEA Japan)の硝子体内に投与した。コントロールとして、PBSまたは100μMとなるようにPBSに溶解したControl-PshRNA(配列番号62)を同量用いた。投与24時間後、100μLのPBSに溶解した大腸菌由来のLPS(Sigma-Aldrich)(0.2mg)を、配列番号30で表される一本鎖核酸分子またはControl-PshRNAを投与したマウスの腹腔内に投与した。得られた硝子体を用いて、LPS投与6時間後に炎症性サイトカイン遺伝子の発現量の測定、LPS投与24時間後に網膜に接着した白血球および硝子体に浸潤した白血球の定量、ならびに視細胞外節の長さの測定およびロドプシンのイムノブロット分析を行った。
LPS投与6時間後、マウスを頸椎脱臼により安楽死させ、網膜を摘出した。文献(Kanda, A., Noda, K., Saito, W. & Ishida, S. (Pro)renin receptor is associated with angiogenic activity in proliferative diabetic retinopathy. Diabetologia 55, 3104-3113, 2012)に記載の方法により、SuperPrep Cell Lysis & RT Kit for qPCR (TOYOBO)を用いて細胞から、TRIzol (Life Technologies)およびGoScrip Reverse Transcriptase (Promega)を用いて網膜組織から、トータルRNAを分離し、オリゴdTプライマーを用いて逆転写反応を行ってcDNAを合成した。合成した前記cDNAを鋳型としてリアルタイム定量PCRを行い、IL-6、CCL2/MCP-1、ICAM-1、およびTNF-α遺伝子の発現量を測定した。これらの遺伝子は、急性および慢性炎症モデルのいずれにも共通して関与することが知られている代表的な遺伝子である。また、プロレニン受容体遺伝子、および内部標準であるGapdh遺伝子の発現量を同様に測定した。前記各遺伝子の発現量は、前記Gapdh遺伝子の発現量により補正した。前記リアルタイム定量PCRは、試薬としてGoTaq qPCR Master Mix (Promega)、機器としてStepOne plus System (Life Technologies)を用いた。IL-6、CCL2/MCP-1、ICAM-1、TNF-α、およびGapdh遺伝子のPCRには、実施例4で用いたプライマーセットと同じプライマーセットを用いた。プロレニン受容体遺伝子のPCRには、以下のプライマーセットを使用した。
プロレニン遺伝子用PCRプライマーセット
(配列番号63) 5'- CTGGTGGCGGGTGCTTTAG -3'
(配列番号64) 5'- GCTACGTCTGGGATTCGATCT -3'
文献(Kanda, A., Noda, K., Oike, Y. & Ishida, S. Angiopoietin-like protein 2 mediates endotoxin-induced acute inflammation in the eye. Lab Invest 92, 1553-1563, 2012)に記載の方法により、perfusion-labeling with fluorescein isothiocyanate (FITC)-coupled concanavalin A lectin(Con A; Vector Laboratories)を用い、網膜血管系および接着性白血球を撮影した。具体的には、LPS投与24時間後、麻酔下のマウスの胸腔を開き、左心室にカニューレを導入した。赤血球および非接着性白血球を除去するためにPBSを注入した後、FITC-conjugated Con Aをかん流させた。眼球を摘出後、網膜のフラットマウント標本を作製した。フラットマウント標本を蛍光顕微鏡(BZ-9000、キーエンス)下で可視化し、網膜あたりのCon A染色された接着性白血球の総数を数えた。
文献(Kanda, A., Noda, K., Oike, Y. & Ishida, S. Angiopoietin-like protein 2 mediates endotoxin-induced acute inflammation in the eye. Lab Invest 92, 1553-1563, 2012)に記載の方法により、硝子体腔に浸潤した白血球の数を調べた。具体的には、通常の方法により、網膜組織を固定してパラフィンに包埋した。厚さ5μmの切片を100μm間隔で3枚作製した。真ん中の切片は、視神経を通過するように作製した。全ての切片をHE(ヘマトキシリン・エオジン)染色し、硝子体腔内の細胞数を数えた。
視細胞外節の長さの測定は、以下のように行った。4%パラホルムアルデヒドを用いて4℃でマウスの眼球を固定後、パラフィンに包埋し、切片を作製した。切片をHE染色し、網膜後部の4点で視細胞外節の長さを測定した。視神経の両端の2点は、200 μmおよび500 μm離れていた。正常なマウス(Control)における視細胞外節の長さを1として、配列番号30で表される一本鎖核酸分子またはControl-PshRNAを投与したエンドトキシン誘発ぶどう膜炎マウスにおける視細胞外節の長さの相対値を求めた。
ロドプシンのイムノブロット分析は、プロテアーゼインヒビターカクテル(ロシュ)を含むSDSバッファーに網膜組織を溶解した点、ならびに一次抗体として抗ロドプシン抗体(メルクミリポア)、および抗βアクチン抗体(医学生物学研究所)を用いた点を除き、実施例5と同様の方法により行った。
網膜に接着した白血球の顕微鏡写真を図10 A-Dに示す(AおよびBはコントロールを投与、CおよびDは配列番号30で表される一本鎖核酸分子を投与)。矢印は、炎症を起こした網膜血管系に接着した白血球を示す。スケールバーは100μmである。網膜に接着した白血球の定量の結果を図10 Eに示す。配列番号30で表される一本鎖核酸分子は、エンドトキシン誘発ぶどう膜炎の網膜における白血球接着を抑制した(図10 A-E)。
硝子体に浸潤した白血球の顕微鏡写真を図10 FおよびGに示す(Fはコントロールを投与、Gは配列番号30で表される一本鎖核酸分子を投与)。矢印は、浸潤した白血球を示す。スケールバーは30μmである。硝子体に浸潤した白血球の定量の結果を図10 Hに示す。視神経乳頭の前方への白血球浸潤は、配列番号30で表される一本鎖核酸分子の投与により減少した(図10 F-H)。
炎症性サイトカイン遺伝子の発現量の測定結果を図11に示す。IL-6、CCL2/MCP-1、ICAM-1、およびTNF-α遺伝子発現量は、PBSまたはコントロール(Control-PshRNA)を投与したエンドトキシン誘発ぶどう膜炎(EIU)マウスにおける発現量の方が、未投与の正常なマウス(Control)における発現量よりも高かった(図11 A-D)。また、配列番号30で表される一本鎖核酸分子((P)RR-PshRNA)を投与したエンドトキシン誘発ぶどう膜炎マウスにおいては、これらの炎症性サイトカインおよびプロレニン受容体((P)RR/Atp6ap2)の発現が有意に減少した(図11 A-E)。
視細胞外節の長さの測定およびロドプシンのイムノブロット分析の結果を図12に示す(RPEは網膜色素上皮、OSは外節、ISは内節、ONLは外顆粒層、INLは内顆粒層である)。配列番号30で表される一本鎖核酸分子((P)RR-PshRNA)を投与したエンドトキシン誘発ぶどう膜炎(EIU)マウスにおいて、視細胞外節の長さの短縮が抑制され(図12 A-D)、ロドプシンの減少が抑制された(図12 E)。
近年、糖尿病網膜症は炎症性疾患と考えられている。したがって、ストレプトゾトシン誘発1型糖尿病モデルマウスを用い、配列番号30で表される一本鎖核酸分子について、慢性炎症抑制効果を確認した。炎症性サイトカイン遺伝子発現量の測定、および網膜血管に接着した白血球の定量を行った。
クエン酸溶液に溶解したストレプトゾトシン(Sigma)(60 mg/kg体重)を腹腔内注射により、4日間連続してマウス(C57BL/6J、6-8週齢)(CLEA Japan)に投与した。ストレプトゾトシン投与後7日目の血漿グルコース濃度が250 mg/dlを超えたマウスを糖尿病とみなし、以後の実験に用いた。ストレプトゾトシン投与2か月後、100μMとなるようにPBSに溶解した配列番号30で表される一本鎖核酸分子の溶液1μLを、33ゲージ注射針を用いてペントバルビタール麻酔下のマウス硝子体内に投与した。コントロールとして、PBSまたは100μMとなるようにPBSに溶解したControl-PshRNA(配列番号62)を同量用いた。投与24時間後に炎症性サイトカイン遺伝子の発現量を測定した。また、投与48時間後に網膜に接着した白血球の定量を行った。
実施例6と同様の方法により、IL-6、CCL2/MCP-1、ICAM-1、TNF-α、およびGapdh遺伝子の発現量を測定した。
実施例6と同様の方法により、網膜に接着した白血球の定量を行った。
網膜に接着した白血球の顕微鏡写真および白血球の定量の結果を図13 A-Dに示す(AおよびBはコントロールを投与、CおよびDは配列番号30で表される一本鎖核酸分子を投与)。スケールバーは100μmである。網膜に接着した白血球の定量の結果を図13 Eに示す。配列番号30で表される一本鎖核酸分子の投与により、白血球数が有意に減少した(図13 A-E)。
炎症性サイトカイン遺伝子の発現量の測定結果を図13 F-Iに示す(Controlは、PBSまたは核酸を未投与の正常なマウスにおける発現量を示す)。配列番号30で表される一本鎖核酸分子((P)RR-PshRNA)を投与した糖尿病マウスにおけるIL-6、CCL2/MCP-1、ICAM-1、およびTNF-α遺伝子の発現は、PBSまたはコントロール(Control-PshRNA)を投与した糖尿病マウスにおける発現と比べて有意に抑制された。
ヒトおよびマウスプロレニン受容体遺伝子の発現抑制配列を有する配列番号30で表される一本鎖核酸分子について、レーザー誘発CNVモデルマウスにおける血管新生抑制効果を確認した。
C57BL/6Jマウス(オス、6-8週齢)(CLEA Japan)の腹腔内にペントバルビタール(0.05mg/g体重)を注射して麻酔し、5%の塩酸フェニレフリンおよび5%トロピカミドを用いて瞳孔を拡張した。レーザー光凝固術は、ND:YAG 532-mn laser(Novus Spectra; Lumenis)を用いて、コンタクトレンズとしてのカバーグラスを用いたスリットランプデリバリーシステムにより行った。各眼に、視神経を囲む4つのレーザースポット照射を行い(180 mW、75 μm、100 ms)、CNV(脈絡膜血管新生)モデルマウスを作製した。レーザー光凝固術後すぐに、100μMとなるようにPBSに溶解した一本鎖核酸分子溶液1μLを、33ゲージ注射針を用いて硝子体内に投与した。コントロールとして、PBSまたは100μMとなるようにPBSに溶解したControl-PshRNA(配列番号62)を同量用いた。レーザー傷害の際に気泡が出現したことにより、ブルッフ膜の破裂を確認した。硝子体出血、網膜出血、網膜化出血している眼は、本試験から除外した。
レーザー光凝固術7日後に麻酔の過剰投与によりマウスを安楽死させ、眼球を摘出して4%パラホルムアルデヒドで1時間固定した。前眼部と神経網膜を除去後、放射状に4箇所を切開して、網膜色素上皮-脈絡膜の複合体を平坦にして脈絡膜フラットマウントを作製した。5%ヤギ血清、および1%トリトンX-100を含むPBSに脈絡膜フラットマウントを浸して室温で1時間インキュベートした後、蛍光標識したイソレクチン-B4とともに4℃で一晩インキュベートした。蛍光顕微鏡(Biorevo, Keyence)で脈絡膜フラットマウントを観察し、microscope software (BZ-II analyzer)を用いてCNVの面積を測定した。
CNVの面積の測定結果を図14A、CNVの顕微鏡写真を図14B-Dに示す。配列番号30で表される一本鎖核酸分子((P)RR-PshRNA)を投与した網膜におけるCNV面積は、PBSまたはコントロール(Control-PshRNA)と比べて有意に小さかった。
本出願は、日本でされた特願2015-257713(出願日:2015年12月29日)を基礎としており、その内容はすべて本明細書に包含されるものとする。
Claims (21)
- プロレニン遺伝子またはプロレニン受容体遺伝子の発現を抑制する一本鎖核酸分子であって、
領域(X)、リンカー領域(Lx)および領域(Xc)のみからなり、
前記リンカー領域(Lx)が、ピロリジン骨格およびピペリジン骨格の少なくとも一方を含む非ヌクレオチド構造を有し、
前記領域(X)および前記領域(Xc)の一方が、下記配列番号1から5:
(配列番号1) 5'- UGAUGUUGUCGAAGAUAGGGG -3'
(配列番号2) 5'- UUGAUAUAGUGGAAAUUCCCU -3'
(配列番号3) 5'- UGAUAUAGUGGAAAUUCCCUU -3'
(配列番号4) 5'- UAGAACUUUCGGAUGAAGGUG -3'
(配列番号5) 5'- AUCAAACUCUGUGUAGAACUU -3'
で表されるプロレニン遺伝子の一部に相補的な配列、および下記配列番号6から11:
(配列番号6) 5'- UUCCAUUUCGGAAAACAACAG -3'
(配列番号7) 5'- AAUUUCCAUUUCGGAAAACAA -3'
(配列番号8) 5'- UUAUAUGCAAGGUUAUAGGGA -3'
(配列番号9) 5'- UAUAUGCAAGGUUAUAGGGAC -3'
(配列番号10) 5'- AAAAGGAACUGCAUUCUCCAA -3'
(配列番号11) 5'- UUAGUAUCCAUAUUAGCCCAU -3'
で表されるプロレニン受容体遺伝子の一部に相補的な配列から選ばれるいずれかのヌクレオチド配列中の、連続する少なくとも18ヌクレオチドからなるヌクレオチド配列を含む発現抑制配列を含み、
他方が、該発現抑制配列と相補的なヌクレオチド配列を含む、核酸分子。 - 領域(X)、リンカー領域(Lx)および領域(Xc)が、3’側から5’側にかけてこの順序で配置され、前記領域(X)の塩基数(X)および前記領域(Xc)の塩基数(Xc)が、下記式(1)または式(2)の条件を満たす、請求項1記載の核酸分子。
X>Xc ・・・(1)
X=Xc ・・・(2) - 前記領域(X)の塩基数(X)および前記領域(Xc)の塩基数(Xc)が、下記式(3)の条件を満たす、請求項2記載の核酸分子。
X-Xc=1、2または3 ・・・(3) - 前記領域(Xc)の塩基数(Xc)が、19塩基~30塩基である、請求項1から3のいずれか一項に記載の核酸分子。
- 前記リンカー領域(Lx)が、下記式(I)で表わされる、請求項1から4のいずれか一項に記載の核酸分子。
前記式中、
X1およびX2は、それぞれ独立して、H2、O、SまたはNHであり;
Y1およびY2は、それぞれ独立して、単結合、CH2、NH、OまたはSであり;
R3は、環A上のC-3、C-4、C-5またはC-6に結合する水素原子または置換基であり;
L1は、n個の原子からなるアルキレン鎖であり、ここで、アルキレン炭素原子上の水素原子は、OH、ORa、NH2、NHRa、NRaRb、SH、もしくはSRaで置換されても置換されていなくてもよく、または、
L1は、前記アルキレン鎖の一つ以上の炭素原子が、酸素原子で置換されたポリエーテル鎖であり、
ただし、Y1が、NH、OまたはSの場合、Y1に結合するL1の原子は炭素であり、OR1に結合するL1の原子は炭素であり、酸素原子同士は隣接せず;
L2は、m個の原子からなるアルキレン鎖であり、ここで、アルキレン炭素原子上の水素原子は、OH、ORc、NH2、NHRc、NRcRd、SHもしくはSRcで置換されても置換されていなくてもよく、または、
L2は、前記アルキレン鎖の一つ以上の炭素原子が、酸素原子で置換されたポリエーテル鎖であり、
ただし、Y2が、NH、OまたはSの場合、Y2に結合するL2の原子は炭素であり、OR2に結合するL2の原子は炭素であり、酸素原子同士は隣接せず;
Ra、Rb、RcおよびRdは、それぞれ独立して、置換基または保護基であり;
lは、1または2であり;
mは、0~30の範囲の整数であり;
nは、0~30の範囲の整数であり;
環Aは、前記環A上のC-2以外の1個の炭素原子が、窒素、酸素または硫黄で置換されてもよく、
前記環A内に、炭素-炭素二重結合または炭素-窒素二重結合を含んでもよく、前記領域(Xc)および前記領域(X)は、それぞれ、-OR1-または-OR2-を介して、前記リンカー領域(Lx)に結合し、
ここで、R1およびR2は、存在しても存在しなくてもよく、存在する場合、R1およびR2は、それぞれ独立して、ヌクレオチド残基または前記構造(I)である。 - RNA分子である、請求項1から6のいずれか一項に記載の核酸分子。
- 少なくとも1つの修飾された残基を含む、請求項1から7のいずれか一項に記載の核酸分子。
- 標識物質を含む、請求項1から8のいずれか一項に記載の核酸分子。
- 安定同位体を含む、請求項1から9のいずれか一項に記載の核酸分子。
- 塩基数の合計が、38塩基以上である、請求項1から10のいずれか一項に記載の核酸分子。
- 下記配列番号23から33で表されるいずれかの塩基配列からなる、請求項1から11のいずれか一項に記載の核酸分子。
(配列番号23)
5’- CCUAUCUUCGACAACAUCAUCCC-Lx-GGGAUGAUGUUGUCGAAGAUAGGGG -3’
(配列番号24)
5’- GGAAUUUCCACUAUAUCAACCCC-Lx-GGGGUUGAUAUAGUGGAAAUUCCCU -3’
(配列番号25)
5’- GGGAAUUUCCACUAUAUCAACCC-Lx-GGGUUGAUAUAGUGGAAAUUCCCUU -3’
(配列番号26)
5’- CCUUCAUCCGAAAGUUCUACACC-Lx-GGUGUAGAACUUUCGGAUGAAGGUG -3’
(配列番号27)
5’- GUUCUACACAGAGUUUGAUCGCC-Lx-GGCGAUCAAACUCUGUGUAGAACUU -3’
(配列番号28)
5’- GUUGUUUUCCGAAAUGGAAAUCC-Lx-GGAUUUCCAUUUCGGAAAACAACAG -3’
(配列番号29)
5’- GUUUUCCGAAAUGGAAAUUGGCC-Lx-GGCCAAUUUCCAUUUCGGAAAACAA -3’
(配列番号30)
5’- CCUAUAACCUUGCAUAUAAGUCC-Lx-GGACUUAUAUGCAAGGUUAUAGGGA -3’
(配列番号31)
5’- CCCUAUAACCUUGCAUAUAAGCC-Lx-GGCUUAUAUGCAAGGUUAUAGGGAC -3’
(配列番号32)
5’- GGAGAAUGCAGUUCCUUUUAGCC-Lx-GGCUAAAAGGAACUGCAUUCUCCAA -3’
(配列番号33)
5’- GGGCUAAUAUGGAUACUAAAACC-Lx-GGUUUUAGUAUCCAUAUUAGCCCAU -3’ - 請求項1から12のいずれか一項に記載の核酸分子を含む、プロレニン遺伝子またはプロレニン受容体遺伝子の発現抑制剤。
- 請求項1から12のいずれか一項に記載の核酸分子を含む医薬。
- 請求項1から12のいずれか一項に記載の核酸分子を含む、眼科疾患の治療剤。
- 眼科疾患が、糖尿病網膜症、ぶどう膜炎、加齢黄斑変性および緑内障からなる群より選択される、請求項15記載の剤。
- プロレニン遺伝子またはプロレニン受容体遺伝子の発現を抑制する方法であって、請求項1から12のいずれか一項に記載の核酸分子を使用することを特徴とする、方法。
- 前記核酸分子を、細胞、組織または器官に投与する工程を含む、請求項17記載の方法。
- 前記投与がin vitroで行われる、請求項18記載の方法。
- プロレニン遺伝子またはプロレニン受容体遺伝子の発現抑制における使用のための、請求項1から12のいずれか一項に記載の核酸分子。
- プロレニン遺伝子またはプロレニン受容体遺伝子の発現抑制剤の製造のための、請求項1から12のいずれか一項に記載の核酸分子の使用。
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| BR112018013323-0A BR112018013323A2 (ja) | 2015-12-29 | 2016-12-29 | The 1 chain nucleic acid molecule which controls revelation of a pro renin gene or a pro renin receptor gene, and its use |
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| RU2018127481A RU2718984C2 (ru) | 2015-12-29 | 2016-12-29 | Одноцепочечная молекула нуклеиновой кислоты, ингибирующая экспрессию гена проренина или гена рецептора проренина, и ее применение |
| CA3009769A CA3009769C (en) | 2015-12-29 | 2016-12-29 | Single-stranded nucleic acid molecule inhibiting expression of prorenin gene or prorenin receptor gene, and use thereof |
| JP2017559254A JP6634095B2 (ja) | 2015-12-29 | 2016-12-29 | プロレニン遺伝子またはプロレニン受容体遺伝子の発現を抑制する一本鎖核酸分子およびその用途 |
| KR1020187019572A KR102116922B1 (ko) | 2015-12-29 | 2016-12-29 | 프로레닌 유전자 또는 프로레닌 수용체 유전자의 발현을 억제하는 일본쇄 핵산 분자 및 이의 용도 |
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| CA2971827A1 (en) | 2014-12-27 | 2016-06-30 | Bonac Corporation | Naturally occuring mirna for controlling gene expression, and use of same |
| CN108064289A (zh) | 2015-03-27 | 2018-05-22 | 株式会社博纳克 | 具有递送功能和基因表达调控能力的单链核酸分子 |
| WO2021024680A1 (ja) | 2019-08-06 | 2021-02-11 | 日本曹達株式会社 | 金属張積層板用樹脂組成物、プリプレグ、及び金属張積層板 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108004310A (zh) * | 2017-12-13 | 2018-05-08 | 深圳大学 | 肾素(原)受体(p)rr基因及其抑制剂的应用 |
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