WO2022202761A1 - c-Metタンパク質結合ペプチド複合体 - Google Patents
c-Metタンパク質結合ペプチド複合体 Download PDFInfo
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Definitions
- This invention relates to a complex containing a peptide that binds to the c-Met protein.
- regenerative medicine which aims to regenerate body tissue that has been damaged by disease or trauma. Because regenerative medicine regenerates tissues using one's own cells, it has the advantage of being less prone to immune problems than conventional methods such as organ transplantation from other people. In these regenerative medicines, it is necessary to culture human-derived cells such as stem cells and differentiate them into target tissues. In addition, basic research using cultured mammalian cells, especially human-derived cells, is continuing in order to create further improved technologies for regenerative medicine. In regenerative medicine and research, the process of efficiently culturing and proliferating target cells is important. Medium components play an important role in the culture of human cells including stem cells, and growth factors (also called GFs) are one of the most important factors.
- c-Met hepatocyte growth factor receptor
- HGF hepatocyte growth factor receptor
- Met its receptor c-Met
- I'm in. c-Met is a single transmembrane receptor-type tyrosine kinase, and when the ligand HGF binds to c-MET, c-MET dimerizes and is activated. Activation of c-Met is known to be essential for embryonic development, organogenesis, and wound healing.
- Patent Document 1 reports an antibody having c-Met agonist activity.
- Non-Patent Document 1 reports a substitute for HGF, which has been developed up to now.
- Patent Document 2 and Non-Patent Document 2 describe peptide conjugates that can be used as c-Met protein agonists.
- Peptide complexes that can be used as c-Met protein agonists are known to promote cell proliferation and migration, and using this cell proliferation effect, various pharmaceuticals and medium compositions for cell culture Application to the use is expected.
- a growth factor substitute added when culturing cells and tissues used in regenerative medicine as an organ protector during organ transplantation, as a regeneration accelerator, and as a therapeutic agent for diseases that cause decreased expression of hepatocyte growth factor
- an organ protector during organ transplantation as a regeneration accelerator
- a therapeutic agent for diseases that cause decreased expression of hepatocyte growth factor The usefulness of
- This invention is basically based on the findings from working examples that the peptide represented by SEQ ID NO: 1 binds to the c-Met protein.
- this invention is basically based on the findings from Examples that a peptide complex designed to form a dimeric structure by binding the above peptides with a linker functions as a c-Met protein agonist.
- the first invention relates to a peptide complex containing peptide A that binds to c-Met protein.
- Peptide A has the amino acid sequence X 1 -X 2 -X 3 -VSX 4 -DX 5 -DX 6 -PRWX 7 -MeC (SEQ ID NO: 1) or a peptide that binds to the c-Met protein consisting of an amino acid sequence in which 1 to 3 amino acids are substituted, deleted, added or inserted in the amino acid sequence set forth in SEQ ID NO:1.
- X 1 is an amino acid that may be N-alkylated.
- X2 is any amino acid .
- X3 is any amino acid.
- X4 is a hydrophobic amino acid that may be N-alkylated.
- X5 is any amino acid.
- X6 is an amino acid or S having an optionally substituted alkyl chain in its side chain.
- X7 is any amino acid.
- a complex containing a novel peptide that binds to the c-Met protein can be provided.
- a novel peptide conjugate having c-Met agonist activity can be provided.
- a medium for cell or tissue culture as a substitute for growth factors added when culturing cells or tissues used in regenerative medicine, containing a novel peptide complex having c-Met agonist activity A composition can be provided. It can also be used, for example, as an organ-protecting agent during organ transplantation and as a regeneration-promoting agent.
- novel c-Met protein agonists and pharmaceutical compositions containing such c-Met protein agonists can be provided. This is useful, for example, as a therapeutic agent for diseases resulting in decreased expression of hepatocyte growth factor (HGF).
- HGF hepatocyte growth factor
- a pharmaceutical composition containing a novel c-Met protein agonist that promotes cell proliferation can be provided.
- FIG. 1 shows the results of c-Met agonist activity measurement by phospho-c-Met Alpha LISA assay using the peptide conjugate of the present invention and human HGF.
- the black square is a c-Met agonist active peptide conjugate (conjugate of peptide (SEQ ID NO: 34) and linker (SEQ ID NO: 37) (GFs_c-Met-00014336-PEG13 dimer; conjugate No. 49 in Table 4) and X indicates human HGF.
- the horizontal axis is the concentration (nM) of the peptide complex or human HGF, and the vertical axis is the activation signal when the maximum value of the activation signal induced by human HGF is set to 100. indicates the relative value of FIG.
- FIG. 2 shows the results of c-Met agonist activity measurement by HUVEC cell proliferation evaluation using the peptide complex of the present invention and human HGF.
- the black square is a c-Met agonist active peptide conjugate (conjugate of peptide (SEQ ID NO: 34) and linker (SEQ ID NO: 37) (GFs_c-Met-00014336-PEG13 dimer; conjugate No. 49 in Table 4) and X indicates human HGF.
- the horizontal axis is the concentration (nM) of the peptide complex or human HGF, and the vertical axis is the activation signal when the maximum value of the activation signal induced by human HGF is set to 100. indicates the relative value of FIG.
- FIG. 3 shows the results after 3 days in a tube formation evaluation test of human proximal renal tubular epithelial cells using the peptide complex of the present invention, human HGF and human epidermal growth factor (EGF).
- FIG. 4 shows the results of tube formation evaluation test of human proximal renal tubular epithelial cells after 8 days using the peptide complex of the present invention, human HGF and human epidermal growth factor (EGF).
- black arrows indicate tube formation with branching.
- FIG. 5 shows the results of human Phospho-RTK array assay evaluation using the peptide complex of the present invention and human HGF.
- FIG. 5(1) shows the array map
- FIG. 5(2) shows the evaluation results.
- black squares indicate wells on which antibody against HGFR was immobilized.
- the first invention relates to a peptide complex containing peptide A that binds to c-Met protein.
- the c-Met protein is a hepatocyte growth factor (HGF) receptor and has tyrosine kinase activity.
- the c-Met protein is a transmembrane receptor composed of ⁇ and ⁇ subunits linked by disulfide bonds.
- the c-Met protein is dimerized in vivo by binding to HGF, followed by autophosphorylation and activation of various signal transductions. As a result, activation of signal transduction of the MAPK pathway and Akt pathway promotes cell proliferation, while inhibiting the induction of apoptosis in cells.
- the c-Met protein is also called c-Met, MET or HGFR.
- GenBank accession number for human c-Met protein is NP_000236 and the GenBank accession number for mouse c-Met protein is NP_032617.
- Hepatocyte growth factor is a multifunctional cytokine that functions as a growth factor for a wide range of tissues and cell types. A heavy chain with a molecular weight of about 60,000 and a light chain with a molecular weight of about 35,000 are disulfide-bonded. It has a heterodimeric structure. HGF is known to promote the proliferation of epithelial cells, endothelial cells and mesenchymal cells, and also has actions such as morphogenesis induction, cell motility enhancement, anti-apoptosis and angiogenesis.
- GenBank accession number for human HGF is NP_000592 and the GenBank accession number for mouse HGF is NP_001276387. Human HGF is preferred, and HGF refers to human HGF unless otherwise specified in this specification.
- Binding to c-Met protein means that a peptide or peptide conjugate binds to c-Met protein. Whether it binds to c-Met protein can be measured by known methods for measuring intermolecular binding, such as surface plasmon resonance (SPR) assay, Scatchard analysis and/or radioimmunoassay (RIA). , enzyme immunoassays (EIA) and competitive binding assays such as sandwich competition assays, and different variants thereof known per se in the art. be. For example, evaluation by surface plasmon resonance (SPR) spectroscopy described in Japanese Patent No. 6426103 (Patent Document 2) is preferable.
- SPR surface plasmon resonance
- RIA radioimmunoassay
- a compound having c-Met agonist activity exhibits c-Met agonist activity by binding to c-Met protein. It is possible to indirectly assess whether the peptide or complex binds to the c-Met protein.
- a complex is said to bind to c-Met protein if part or all of the complex can bind to c-Met protein.
- the portion of peptide A in the complex may be the site that binds to the c-Met protein, and other portions contained in the complex may also c- It may bind to the Met protein.
- c-Met Agonist Activity refers to an activity that binds to c-Met protein and exhibits effects similar to those of HGF. Whether a peptide or peptide complex has c-Met agonist activity can be measured by a known method, for example, as shown in the Examples, phospho-c-Met AlphaLISA assay, HUVEC cell proliferation Tests and the like can be used to assess c-Met agonist activity. Also, the ELISA method described in Japanese Patent No. 6426103 (Patent Document 2) can be used to evaluate the phosphorylation ability of c-Met.
- peptide conjugates having c-Met agonist activity Fatty liver, acute renal failure, chronic renal failure, diabetic nephropathy, acute pneumonia, pulmonary fibrosis, vascular disorder, myocardial infarction, dilated cardiomyopathy, skin ulcer, cerebral infarction, arteriosclerosis obliterans, gastric ulcer and muscle atrophy Lateral sclerosis, etc., can be used to treat these diseases.
- Peptide conjugates are peptide conjugates containing peptide A that bind c-Met protein.
- This peptide complex contains one or more peptides A.
- the peptide conjugate contains two peptides A.
- Examples of peptide complexes containing one peptide A include, but are not limited to, peptide A and a substance (payload) to be delivered to the c-Met protein, such as a known pharmaceutical composition. and a peptide complex containing peptide A and a marker composition such as a fluorescent protein.
- the ability of peptide A to bind to c-Met protein is used to deliver the pharmaceutical composition to c-Met to the c-Met protein. becomes possible.
- the substance to be delivered to the c-Met protein is not particularly limited, and may be any substance desired by those skilled in the art. Examples of such substances include, but are not limited to: Compounds: Not only low-molecular-weight compounds and middle-molecular-weight compounds, but also any compound that can be introduced by the cell cytosis mechanism can be used. Examples include known low-molecular-weight drugs.
- Peptide may be a peptide that binds to a target in the body and exhibits some effect, eg, a cyclic peptide.
- RI Any compound that can be labeled with a radioisotope, such as a low-molecular-weight compound, a middle-molecular-weight compound, or an antibody labeled with a radioisotope. Examples include compounds for PET examinations.
- Protein Any protein, such as an antibody or an enzyme, that exhibits a useful function in the body can be used. Examples include enzymes used in enzyme replacement therapy.
- Nucleic acid DNA, RNA, etc., as long as they contain a base sequence. Examples include nucleic acid medicines.
- DDS can be DDS molecules such as liposomes and micelles. The DDS molecule may further contain a compound such as a drug inside. and composites thereof listed above.
- a peptide conjugate is a peptide conjugate comprising (1) a first peptide, (2) a second peptide, and (3) a linker connecting the first and second peptides.
- This peptide complex may be a peptide complex consisting only of (1) a first peptide, (2) a second peptide, and (3) a linker connecting the first peptide and the second peptide. .
- at least one of the first peptide and the second peptide is peptide A.
- the first peptide and the second peptide may be the same or different, but peptide A is preferred. That is, peptide complexes may be heterodimers or homodimers.
- a heterodimer is a peptide in which the first peptide and the second peptide are different (eg, peptide A with a different amino acid sequence).
- a homodimer is peptide A in which the first and second peptides are the same.
- Preferred peptide conjugates are homodimers.
- first peptide and the second peptide are the same peptide A, and that the C-terminals of the first peptide and the second peptide are linked to a linker to form a peptide complex.
- first peptide and the second peptide are cyclic peptides.
- Peptide A This specification describes Peptide A as well as complexes containing Peptide A.
- Peptide A is (1) From the amino acid sequence described in X 1 -X 2 -X 3 -VSX 4 -DX 5 -DX 6 -PRWX 7 -MeC (SEQ ID NO: 1) or (2) 1 to 3 (1, 2 or 3) amino acids in the amino acid sequence shown in SEQ ID NO: 1 are substituted, deleted, added Or a peptide that binds to the c-Met protein consisting of the inserted amino acid sequence. Also in this peptide (2), the 4th V, 5th S, 7th D, 9th D, 11th P, 12th R, 13th W, and 15 in SEQ ID NO: 1 Those in which the th MeC is maintained are preferred.
- X 1 is an amino acid which may be N-alkylated, preferably A which may be N-methylated or F which may be N-methylated. A more preferred X 1 is MeF (N-methylated F).
- X2 is any amino acid , preferably a hydrophilic amino acid, an aliphatic/branched chain amino acid or an aromatic amino acid, more preferably V, T, E, Q or W. The most preferred X2 is T.
- X3 is any amino acid , a hydrophilic amino acid, an aliphatic amino acid or an aromatic amino acid, more preferably A, R, Y or D. The most preferred X3 is A.
- X 4 is a hydrophobic amino acid which may be N-alkylated, preferably a hydrophobic amino acid which may be N-methylated, more preferably F or N- which may be N-methylated It is L which may be methylated. Most preferred X4 is MeF (N-methylated F).
- X5 is any amino acid, preferably a hydrophilic amino acid, an aliphatic/branched chain amino acid or P, more preferably D, E, S, P or V. The most preferred X5 is E.
- X 6 is an amino acid or S having an optionally substituted alkyl chain in its side chain, preferably (S)-2-aminoheptanoic acid (Ahp), R,L-norleucine (Nle), (S )-2,7-diaminoheptanoic acid (Hty), or S.
- a more preferred X6 is Ahp .
- X7 is any amino acid, preferably a hydrophilic or aliphatic amino acid, more preferably S, A, L- ⁇ -aminobutanoic acid (Abu), D, Q, or V; The most preferred X7 is S.
- amino acid that may be N-alkylated refers to an amino acid having an alkyl group on the nitrogen that forms a peptide bond, or an amino acid having no alkyl group.
- N-alkylamino acids include, for example, N-butylamino acids, N-ethylamino acids, N-methylamino acids and the like.
- optionally N-methylated indicates inclusion of N-methylated amino acids. For example, optionally N-methylated A indicates alanine (A) or N-methylalanine (MeA).
- amino acids having an optionally substituted alkyl chain on the side chain refer to amino acids having an alkyl chain on the side chain, such as amino acids belonging to the aliphatic amino acid group, and functional It is an amino acid with a substituted group, preferably an amino acid having 5 or more C atoms in the alkyl group.
- amino acids having an alkyl chain on the side chain such as amino acids belonging to the aliphatic amino acid group, and functional It is an amino acid with a substituted group, preferably an amino acid having 5 or more C atoms in the alkyl group.
- Ahp, Nle, Hty, etc. are included.
- Preferred examples of peptide A are (1) A peptide consisting of the amino acid sequence set forth in MeF-TAVS-MeF-DED-Ahp-PRWS-MeC (SEQ ID NO: 34), or (2) A peptide having an amino acid sequence in which 1 to 3 amino acids are substituted, deleted, added or inserted in the amino acid sequence shown in SEQ ID NO: 34, and which binds to the c-Met protein.
- Conservative amino acid substitutions are preferably made when one, two or three amino acid residues are substituted, deleted, added or inserted from a particular sequence.
- a "conservative amino acid substitution” means a substitution with a functionally equivalent or similar amino acid.
- Conservative amino acid substitutions in a peptide result in static changes in the amino acid sequence of the peptide. For example, one or more amino acids with similar polarity act functionally equivalently, resulting in a static change in the amino acid sequence of such peptides.
- substitutions within a group can be considered conservative in structure and function.
- cysteine residues can have a less polar, oxidized (disulfide) form compared to the reduced (thiol) form.
- the long aliphatic portion of the arginine side chain may constitute structurally and functionally important features.
- side chains containing aromatic rings can contribute to ion-aromatic or cation-pi interactions. In such cases, substitution of amino acids having these side chains with those belonging to the acidic or non-polar groups may be structurally and functionally conservative.
- Residues such as proline, glycine and cysteine can have a direct effect on backbone conformation and often cannot be substituted without structural distortion.
- Conservative amino acid substitutions are specific substitutions based on side chain similarity, as shown below (Lenininger, Biochemistry, 2nd Revised Edition, 1975, pp. 73-75: L. Lehninger, Biochemistry, 2nd edition , pp 73-75, Worth Publisher, New York (1975)) and typical permutations.
- conservative amino acid substitution is preferably substitution with an amino acid belonging to the same group to which a certain amino acid belongs, for example, in a group in which natural amino acids are divided based on the properties of their common side chains as follows.
- Hydrophobic (also referred to as non-polar) amino acids amino acids that exhibit hydrophobicity (non-polarity), such as alanine (also referred to as “Ala” or simply “A”), glycine (also referred to as “Gly” or simply “G”) , valine (also referred to as “Val” or simply “V”), leucine (also referred to as “Leu” or simply “L”), isoleucine (also referred to as “Ile” or simply “I”), proline (also referred to as “Pro” or simply “P”), phenylalanine (also referred to as “Phe” or simply “F”), tryptophan (also referred to as “Trp” or simply “W”), tyrosine (also referred
- Hydrophobic amino acids can be further classified into the following groups.
- Aliphatic Amino Acid An amino acid having a fatty acid or hydrogen in its side chain, including Ala, Gly, Val, Ile and Leu.
- Aliphatic/branched chain amino acids Amino acids having branched fatty acids in their side chains, including Val, Ile, and Leu.
- Aromatic amino acid An amino acid having an aromatic ring in its side chain, including Trp, Tyr, and Phe.
- Hydrophilic (also referred to as polar) amino acids amino acids that exhibit hydrophilicity (polarity), such as serine (also referred to as “Ser” or simply “S”), threonine (also referred to as “Thr” or simply “T”), cysteine (also referred to as “Cys” or simply “C”), asparagine (also referred to as “Asn” or simply “N”), glutamine (also referred to as “Gln” or simply “Q”), aspartic acid (“Asp” or simply “ D”), glutamic acid (also referred to as “Glu” or simply “E”), lysine (also referred to as “Lys” or simply “K”), arginine (also referred to as “Arg” or simply “R” ), histidine (also abbreviated as “His” or simply “H”).
- polarity such as serine (also referred to as “Ser” or simply “S”), threonine (also referred
- Hydrophilic amino acids can be further classified into the following groups. Acidic amino acid: an amino acid with an acidic side chain, including Asp, Glu, Basic amino acid: an amino acid having a basic side chain, including Lys, Arg, and His. Neutral amino acid: Amino acids whose side chains are neutral, including Ser, Thr, Asn, Gln and Cys. In addition, Gly and Pro can be classified as "amino acids that affect the direction of the main chain", and amino acids containing sulfur molecules in side chains, Cys and Met, can be classified as "sulfur-containing amino acids”.
- amino acid includes not only natural amino acids but also non-natural amino acids.
- Non-natural amino acids include, for example, N-alkylamino acids obtained by N-alkylating the above-described natural amino acids, lower branched or unbranched nitrogens forming peptide bonds (e.g., C1-C5, preferably , C1-C3, more preferably those modified with an alkyl group of C1).
- the N-alkylamino acid is preferably N-ethylamino acid, N-butylamino acid or N-methylamino acid, more preferably N-methylamino acid.
- non-natural amino acids include D-type amino acids (also referred to as D-amino acids), ⁇ -amino acids, ⁇ -amino acids, amino acid mutants, chemically modified amino acids such as amino acid derivatives, and in vivo amino acids such as norleucine and ornithine. Amino acids that are not protein building blocks are included.
- amino acids in which a functional group is further added to the side chain of a natural amino acid or substituted with another functional group e.g., amino acids with substitutions or additions in the side chain arylene group, alkylene group, etc., side chain arylene group, amino acids with an increased number of carbon atoms in an alkylene group or an alkyl group, amino acids with substituted aromatic rings in side chains, heterocyclic or condensed amino acids, etc.
- A4p is alanine with a piperidyl group added to its side chain, and due to the addition of the piperidyl group, it exhibits basic polarity, unlike alanine belonging to the non-polar amino acid group. That is, the aforementioned grouping of naturally occurring amino acids based on their common side chain properties can include unnatural amino acids with similar side chain properties.
- N-methylarginine (MeR) which is an N-methylated amino acid of arginine belonging to basic amino acids, is a non-natural amino acid, but it exhibits basicity, so it can be classified as a basic amino acid.
- MeR N-methylarginine
- non-natural amino acids that exhibit similar side chain properties to certain amino acids can also be included as targets for conservative amino acid substitutions.
- Non-naturally occurring amino acids include, without limitation, N-methyl amino acids, Ahp, Nle, Hty, Abu, and the like.
- Ahp, Nle, Abu and Hty can be divided into hydrophobic amino acids
- Ahp, Nle and Abu into aliphatic amino acids
- Hty into aromatic amino acids.
- N-methyl amino acids can be classified as N-alkyl amino acids or according to the nature of the side chain of the original non-N-methylated amino acids.
- peptide A is preferably a peptide consisting of the amino acid sequence set forth in any one of SEQ ID NOs: 2 to 34.
- a peptide consisting of the amino acid sequence set forth in SEQ ID NO:34 is preferred.
- Peptide A is preferably a cyclic peptide.
- a peptide refers to a structure in which a plurality of amino acids are continuous, and includes polypeptides and proteins in its meaning.
- amino acids include not only naturally occurring amino acids (natural amino acids) but also non-naturally occurring amino acids (non-natural amino acids).
- the peptide of the present invention includes a peptide in which a cyclic portion is formed by cyclization after synthesis, a peptide obtained by further chemically modifying the peptide, and a complex of a peptide and a substance bound to the peptide. .
- amino acids may be modified for cyclization of the peptide.
- Peptides also include peptides containing such partially modified amino acids.
- An example of modification for cyclization is the addition of a chloroacetyl group to an amino acid located at the N-terminus, which binds to a cysteine residue in the peptide and cyclizes it.
- Peptides containing various (natural/unnatural) amino acids to which chloroacetyl groups have been added are also included in the peptides of the present application.
- a cyclic peptide is a peptide in which two amino acids are bonded and all or part of it is cyclic.
- peptides in which amino acids in a peptide form a crosslinked structure those in which a cyclic structure is formed by lactam ring formation or macrocyclization reaction, and those having a lasso peptide-like structure are also included. That is, in the present application, the cyclic peptide may have a linear portion as long as a portion thereof forms a cyclic structure.
- Peptides generally have poor metabolic stability in vivo, and their large size makes it difficult to permeate cell membranes.
- a method of cyclizing a peptide has been taken to address such a problem. Cyclization of peptides improves protease resistance, improves metabolic stability, and restricts conformational changes, suggesting that rigidity increases and membrane permeability and affinity with target proteins increase. It has been.
- Cyclization of peptides can be performed according to known methods.
- a peptide may be designed to contain two or more cysteine residues so that it can form a cyclic structure through disulfide bonds after translation.
- a peptide having a chloroacetyl group at the N-terminus was synthesized by genetic code reprogramming technology, Cyclization can also be achieved by placing a cysteine residue in the peptide.
- cyclization of the peptide through a thioether bond results in spontaneous post-translational nucleophilic attack of the mercapto group on the chloroacetyl group, resulting in cyclization of the peptide through a thioether bond.
- Other combinations of amino acids that combine to form a ring may be placed within the peptide and circularized by genetic code reprogramming techniques.
- the peptide may be cyclized by synthesizing a cycloamide at the N-terminus, placing L-2-aminoadipic acid residues in the peptide and linking between them.
- any known cyclization method can be used without particular limitation.
- Peptide length of peptide A is not particularly limited, but total amino acid residues (if the substance bound to the peptide or the linker that binds the substance and the peptide contains amino acids, amino acids are not included), but preferably within 20 residues.
- the number of amino acids is 6 or more, 7 or more, 8 or more, 9 or more, 10 or more, 11 or more, preferably 19 or less, 18 or less, 17 or less, 16 or less, 15 or less.
- nucleic Acid Encoding Peptide A This specification also describes nucleic acid encoding peptide A (c-Met protein binding peptide).
- nucleic acid may be naturally occurring or non-naturally occurring and includes, but is not limited to, DNA, RNA, and chimeras thereof.
- Linker The type and length of the linker used in the peptide conjugate are not particularly limited as long as the peptide conjugate can bind to the c-Met protein.
- linkers include amino acid linkers (peptide linkers), chemical linkers, fatty acid linkers, nucleic acid linkers, sugar chain linkers, etc.
- they may be complexes such as chemical linkers and peptide linkers.
- Chemical linkers include, for example, PEG (Polyethyleneglycol) linkers.
- the linker may also be a fatty acid linker containing divalent chemical moieties derived from fatty acids.
- Amino acid (peptide) linkers are linkers comprising at least one arbitrary amino acid, such as the sequence [Gly-Gly-Gly-Gly-Ser]n, as described in US Pat. No. 7,271,149. (where n is 1, 2, 3, 4, 5 or 6) or using a serine-rich peptide linker as described in US Pat. No. 5,525,491. be able to.
- These linkers can be bound to the c-Met protein-binding peptide by a known method or a method analogous thereto.
- a linker can be attached to the c-Met protein-binding peptide by attaching the linker to the terminal Cys residue of the c-Met protein-binding peptide.
- a linker can also be attached to amino acids other than the C-terminus of the c-Met protein-binding peptide.
- a preferred example of a linker is a PEG linker.
- a PEG linker is a linker comprising polyethylene glycol (PEG) or polyethylene glycol (PEG) derivatives.
- PEG linkers may include amino acids.
- the PEG linker preferably contains 8 or more PEG molecular units.
- Specific examples of linkers are (1) a linker having a sequence set forth in any of SEQ ID NOS: 35-41, or (2) 1-3 amino acids in a sequence set forth in any of SEQ ID NOS: 35-41. (Amino acids are not particularly limited as long as they can be used as linkers, but for example, S, G and K and any one or more of those amino acids) are replaced, deleted, added or inserted from the sequence It is a linker.
- Peptide A, linkers and peptide complexes can be prepared by known methods (eg, Japanese Patent No. 6426103 (Patent Document 2)) or by appropriately modifying known methods.
- c-Met Protein Agonists The peptide conjugates described above have HGF-like functions through promoting autophosphorylation through multimerization of the c-Met protein. Therefore, the peptide conjugate described above is useful as a c-Met agonist (agonist) or a pharmaceutical composition containing a c-Met protein agonist.
- compositions comprising a peptide conjugate as described above and a pharmaceutically acceptable carrier.
- pharmaceutical compositions containing c-Met protein agonists are used for ischemic heart disease, acute hepatitis, fulminant hepatitis, liver cirrhosis, biliary atresia, fatty liver, acute renal failure, chronic renal failure, diabetes mellitus.
- nephropathy selected from the group consisting of nephropathy, acute pneumonia, pulmonary fibrosis, vascular disorder, myocardial infarction, dilated cardiomyopathy, skin ulcer, cerebral infarction, arteriosclerosis obliterans, gastric ulcer and amyotrophic lateral sclerosis Used for treatment or prevention of disease.
- the pharmaceutical composition according to the present invention contains the peptide complex according to the present invention as an active ingredient. Since it has HGF-like functions, it is useful for cell growth promotion, cell migration promotion, apoptosis suppression, morphogenesis induction, angiogenesis, regeneration and protection of tissues and organs, and as a therapeutic or preventive agent for diseases related to these. Used.
- Such diseases include, for example, acute hepatitis, fulminant hepatitis, liver cirrhosis, biliary atresia, fatty liver, acute renal failure, chronic renal failure, diabetic nephropathy, acute pneumonia, pulmonary fibrosis, vascular disorders, myocardial infarction, dilatation
- diseases include, but are not limited to, type cardiomyopathy, skin ulcers, cerebral infarction, arteriosclerosis obliterans, gastric ulcers, and amyotrophic lateral sclerosis.
- the dosage form of the pharmaceutical composition is not particularly limited, and may be oral administration or parenteral administration.
- Parenteral administration includes, for example, injection administration such as intramuscular injection, intravenous injection, and subcutaneous injection, transdermal administration, and transmucosal administration (nasal, oral, ocular, pulmonary, vaginal, and rectal). administration and the like.
- Peptides in pharmaceutical compositions can be modified in various ways in view of their susceptibility to metabolism and excretion. For example, polyethylene glycol (PEG) or sugar chains can be added to polypeptides to prolong blood residence time and reduce antigenicity.
- PEG polyethylene glycol
- sugar chains can be added to polypeptides to prolong blood residence time and reduce antigenicity.
- biodegradable polymer compounds such as polylactic acid glycol (PLGA), porous hydroxyapatite, liposomes, surface-modified liposomes, emulsions prepared with unsaturated fatty acids, nanoparticles, nanospheres, etc. are used as sustained-release bases. , and may be used to encapsulate the polypeptide.
- PLGA polylactic acid glycol
- porous hydroxyapatite porous hydroxyapatite
- liposomes liposomes
- surface-modified liposomes emulsions prepared with unsaturated fatty acids, nanoparticles, nanospheres, etc.
- emulsions prepared with unsaturated fatty acids nanoparticles, nanospheres, etc.
- emulsions prepared with unsaturated fatty acids nanoparticles, nanospheres, etc.
- emulsions prepared with unsaturated fatty acids nanoparticles, nanospheres, etc.
- the pharmaceutical composition may use the active ingredient as it is, or may be formulated by adding pharmaceutically acceptable carriers, excipients, additives and the like.
- Dosage forms include liquids (e.g., injections), dispersions, suspensions, tablets, pills, powders, suppositories, powders, fine granules, granules, capsules, syrups, troches, Examples include inhalants, ointments, eye drops, nose drops, ear drops, poultices, and the like.
- excipients for example, excipients, binders, disintegrants, lubricants, solubilizers, solubilizers, coloring agents, flavoring agents, stabilizers, emulsifiers, absorption enhancers, surfactants, pH adjustment Agents, preservatives, antioxidants, etc. can be used as appropriate and can be carried out in a conventional manner.
- ingredients used for formulation include purified water, saline, phosphate buffer, dextrose, glycerol, pharmaceutically acceptable organic solvents such as ethanol, animal and vegetable oils, lactose, mannitol, glucose, sorbitol, and crystalline cellulose.
- Surfactants such as polyoxyethylene lauryl ethers, sodium lauryl sulfate and saponin; bile salts such as glycocholic acid, deoxycholic acid and taurocholic acid; Chelating agents such as salicylic acids; fatty acids such as caproic acid, capric acid, lauric acid, oleic acid, linoleic acid, mixed micelles; enamine derivatives, N-acyl collagen peptides, N-acyl amino acids, cyclodextrins, chitosans, A nitric oxide donor or the like may also be used.
- Pills or tablets can also be coated with sugar-coated, gastric-soluble, or enteric-coated substances.
- Injections can contain distilled water for injection, physiological saline, propylene glycol, polyethylene glycol, vegetable oils, alcohols and the like.
- wetting agents, emulsifiers, dispersants, stabilizers, solubilizers, solubilizers, preservatives and the like can be added.
- composition of the present invention may be administered in combination with other drugs or therapeutic methods useful for the above diseases.
- the dosage may vary depending on symptoms, patient age, Depending on gender, body weight, sensitivity difference, dosing method, dosing interval, type of active ingredient, type of formulation, but not particularly limited, for example, 30 ⁇ g to 1000 mg, 100 ⁇ g to 500 mg, 100 ⁇ g to 100 mg once or divided into several times can be administered as In the case of administration by injection, 1 ⁇ g/kg to 3000 ⁇ g/kg or 3 ⁇ g/kg to 1000 ⁇ g/kg may be administered once or in several divided doses, depending on the body weight of the patient.
- mammals e.g., humans, mice, rats, guinea pigs, rabbits, dogs, horses, monkeys, pigs, sheep, etc.
- the dosage may vary depending on symptoms, patient age, Depending on gender, body weight, sensitivity difference, dosing method, dosing interval, type of active ingredient, type of formulation, but not particularly limited, for example, 30 ⁇ g to 1000 mg, 100 ⁇ g to 500 mg, 100 ⁇ g to 100
- This specification also provides methods of treatment of the various diseases described above comprising administering to a subject (eg, mammal or patient) an effective amount of the peptide conjugate, or an effective amount of the pharmaceutical composition.
- a subject eg, mammal or patient
- an effective amount of the peptide conjugate or an effective amount of the pharmaceutical composition.
- This specification also describes the use of peptide A or the above-described peptide conjugate in the manufacture of the above-described pharmaceutical composition, and the method of manufacturing the above-described pharmaceutical composition using peptide A or the above-described peptide conjugate. Describe.
- This specification also provides culture medium additives containing the above-described peptide conjugates and culture medium containing the peptide conjugates.
- This culture medium additive is used for culturing mammalian-derived cells or tissues.
- cells to be cultured include, but are not limited to, somatic cells, germ cells, and pluripotent stem cells, which are cells that have the ability to differentiate into all tissues and cells that make up the living body. be done.
- Pluripotent stem cells include, for example, ES cells, spermatogonial stem cells, pluripotent germ stem cells, embryonic germ cells, iPS cells, cultured fibroblasts, and cells derived from bone marrow stem cells.
- tissue to be cultured include tissues differentiated from cells and tissues removed from the body.
- this culture medium additive can be used to protect regenerated tissues and organs for organ transplantation.
- Cells or tissues are preferably derived from primates such as humans, monkeys and chimpanzees, more preferably from humans.
- the medium is not particularly limited as long as it is a medium for culturing cells or tissues, but a medium to which human HGF is added is preferred. It may be a serum medium, preferably a serum-free medium or a low-serum medium.
- the culture medium additive may be in the form of a solution or in the form of a dry solid (eg solid, powder, etc.). When it is in the form of a solution, it may be used as a culture medium as it is, or it may be diluted with a solvent and, if necessary, added with the additives described above, and used as a culture medium.
- Solvents used for dilution include, for example, water, buffer solutions, physiological saline, media used for various cell and tissue cultures, etc., and these can be used alone or in combination of two or more. good too.
- the culture medium additive is in the form of a dry solid, for example, it is dissolved in a solvent such as water, buffer solution, physiological saline, and medium used for various cell and tissue cultures, and if necessary, the above-mentioned You may use what added the additive as a culture medium.
- the content of the peptide complex of the present invention in the medium for culturing cells or tissues or in the medium for cells obtained therefrom can be arbitrarily set by those skilled in the art depending on the cells or tissues to be cultured.
- the final concentration is about 0.01 to about 10000 nmol / L, preferably about 0.1 to about 1000 nmol / L, more preferably about 0.5 to about 1000 nmol / L, more preferably from about 1 to about 100 nmol/L.
- DDS Carrier Peptide A described above has the property of binding to c-Met protein. For this reason, peptide A or a peptide conjugate containing peptide A can be used as a DDS carrier (drug delivery carrier) or a drug delivery conjugate by binding to a known substance to be delivered to c-Met protein, such as a drug. Function. This specification also discloses such DDS carriers and drug delivery complexes. Peptide A or a peptide complex can be bound to a drug using a known method.
- ⁇ as Angstroms (unit); BSA as bovine serum albumin; DMSO as dimethylsulfoxide; DMF as dimethylformamide; DIPEA or DIEA as N,N-diisopropylethylamine; DODT as 3,6-dioxa-1,8-octane-dithiol; DMEM as Dulbecco's Modified Eagle Medium EC50 as 50% effective concentration; EGF as Epidermal Growth Factor; Fmoc as 9-fluorenylmethyloxycarbonyl; FBS as fetal bovine serum; Fmoc-Lys(Fmoc)-OH as N 2 ,N 6 -bis(((9H-fluoren-9-yl)methoxy)carbonyl)-L-lysine; g as gram (unit); HATU as O-(7-azabenzotriazol-1-yl)-N,N,N',N'-tetramethylur
- Fmoc-Trp(Boc)-OH Fmoc-Thr(tBu)-OH; Fmoc-N-Me-Gly-OH; Fmoc-Asp(OtBu)-OH; Fmoc-N-Me-Phe-OH; -OH; Fmoc-N-Me-Ala-OH; Fmoc-His(Trt)-OH; Fmoc-Tyr(tBu)-OH; Fmoc-Val-OH; Fmoc-HydPro(tBu)-OH; Trt)-OH; Fmoc-Lys(Mtt)-OH; Fmoc-Ser(tBu)-OH; Fmoc-N-Me-Ser(tBu)-OH.
- ESI-MS (+) in mass spectrometry, with the molecular weight calculated considering the amino acids used according to the target sequence and the building blocks used as necessary.
- ESI-MS(+) indicates electrospray ionization mass spectrometry performed in positive ion mode. Detected masses were reported in "m/z” unit notation. Compounds with a molecular weight of approximately greater than 1000 were frequently detected as divalent ions or trivalent ions.
- reaction was carried out using Fmoc-AA/HATU/DIPEA (8.4 equivalents/7.8 equivalents/16.8 equivalents) per equivalent of resin.
- Fmoc was removed by reacting with a 20% piperidine in DMF solution at 25° C. for 5 minutes, after removing the solution, adding a 20% piperidine in DMF solution again and reacting for 15 minutes.
- Introduction of the chloroacetyl group was carried out by removing the Fmoc group of the ⁇ -amino group of the solid-phase resin holding the Fmoc-protected peptide obtained in the previous step by the method described above, followed by addition of 0.3M chloroacetic acid in DMF.
- reaction solution was recovered by filtration through a frit.
- the solid-phase resin remaining in the reaction vessel was shaken again with the cutting cocktail, and the solution component was recovered from the frit and mixed with the above filtrate.
- this filtrate was added to a mixed solvent of excess diethyl ether/hexane (1/1) cooled to 0° C., a cloudy precipitate was formed.
- the mixture was centrifuged (8500 rpm, 0° C., 30 seconds) and the solution decanted.
- the resulting solid was washed again with a small amount of diethyl ether/hexane cooled to 0° C. and dried under reduced pressure.
- the resulting solid was used for the next cyclization reaction.
- the cyclization reaction of the peptide was carried out by dissolving the peptide in DMSO so that the final concentration of the peptide was 2.5 mM based on the number of moles of the solid phase resin, adding 10 equivalents of triethylamine, and shaking at 25° C. for 16 hours.
- the resulting reaction solution was concentrated under reduced pressure using EZ-2 Elite.
- the resulting mixture was subjected to solid phase extraction using Gilson ASPEC® C18 cartridges.
- the resulting extract was concentrated under reduced pressure using EZ-2 Elite. Analyzed by LC-MS, the mass spectrum of the desired product was observed as one of the main peaks.
- a DMF solution (10 equivalents), a DMF solution of 0.49 M HATU (9.8 equivalents), and a DMF solution of 0.5 M DIPEA (10 equivalents) were added to the solid-phase resin and shaken at room temperature for 30 minutes.
- Deprotection of the side chain and cleavage from the solid-phase resin were carried out by the following method. First, the resin obtained after the chloroacetyl group-introducing step was washed with DMF five times and methylene chloride three times, and then dried under reduced pressure. Subsequently, reactant cocktail-A (a mixture of TFA/H 2 O/TIS/DODT at a volume ratio of 92.5:2.5:2.5:2.5) was added to the reaction vessel containing the solid phase resin.
- reactant cocktail-A a mixture of TFA/H 2 O/TIS/DODT at a volume ratio of 92.5:2.5:2.5:2.5
- the cyclization reaction of the peptide was carried out by dissolving the peptide in DMSO/acetonitrile/water (18/1/1) so that the final concentration of the peptide was 1 mM based on the number of moles of the solid-phase resin. °C for 15 hours.
- the resulting reaction solution was concentrated under reduced pressure using EZ-2 Elite.
- the purity of the target product was calculated from the area ratio of the LC/MS (UV wavelength 225 nm) chromatogram under the following analysis conditions and was 59.97%.
- c-Met activation ability c-Met agonist activity of the peptide conjugate of the present invention
- Phosphorylation of Met was verified.
- Human A431 cells were cultured in DMEM containing 10% FBS (Gibco), high glucose, GlutaMAX (registered trademark) Supplement, pyruvate (Thermo Fisher Scientific). The cells were detached using Accutase (Innovative cell technologies), seeded in a 96-well plate at 10,000 cells per well, and cultured overnight.
- the assay was performed according to the protocol of the kit, and SpectraMax (registered trademark) Paradigm (registered trademark) multimode microplate reader (Molecular Devices Japan) was used for signal detection.
- the obtained signals were analyzed with GraphPad Prism (MDF). Taking the maximum value of the signal induced by HGF as 100%, 2 indicates activation of 50% or more, and 2 indicates activation of 50% or less. was described as 1.
- Table 3 shows the results.
- Activity measurement was performed using a monomeric peptide in the same manner, but c-Met agonist activity was not shown.
- the C50 value was calculated with GraphPad Prism as the concentration of peptide exhibiting 50% activity of the signal induced by HGF. Table 4 shows the results.
- the EC50 value of HGF as a control was 0.66 nM. Furthermore, a graph of the c-Met agonist activity of the peptide (SEQ ID NO: 34) and linker (SEQ ID NO: 37) conjugate (GFs_c-Met-00014336-PEG13 dimer; conjugate No. 49 in Table 4) is shown in FIG. Indicated. The EC50 of the peptide conjugate was 0.72 nM, showing almost the same c-Met agonistic activity as HGF. These results indicated that the peptide complex of the present invention certainly has c-Met agonist activity.
- HUVEC human umbilical vein endothelial cells
- HuMedia-EG2 HuMedia-EG2
- Cells were detached using Accutase (Innovative Cell Technologies), resuspended in Medium without serum or growth factors (Cell Systems) containing 5% FBS (MBL), and plated in 96 wells with 10,000 cells per well. Plates were inoculated and cultured overnight.
- the obtained signal values were analyzed with GraphPad Prism to calculate EC50.
- a graph of the activity obtained is shown in FIG.
- the EC50 of HGF was 0.37 nM
- the EC50 of the peptide complex was 0.55 nM, indicating that the peptide complex of the present invention exhibited almost the same c-Met agonist activity as HGF.
- the resin obtained after the chloroacetyl group-introducing step was washed with DMF five times and methylene chloride three times, and then dried under reduced pressure.
- reactant cocktail-A a mixture of TFA/H 2 O/TIS/DODT at a volume ratio of 92.5:2.5:2.5:2.5
- the reaction solution was recovered by filtration through a frit.
- the solid-phase resin remaining in the reaction vessel was shaken again with the cutting cocktail, and the solution component was recovered from the frit and mixed with the above filtrate.
- the filtrate was added to excess diethyl ether/hexane (1/1) mixed solvent cooled to 0° C. to form a cloudy precipitate, the mixture was centrifuged (9000 rpm, 2 minutes), and the solution was decanted. The obtained solid was washed again with a small amount of diethyl ether/hexane cooled to 0° C. and then dried under reduced pressure. The resulting solid was used for the next cyclization reaction.
- the peptide cyclization reaction was carried out by dissolving the peptide in DMSO/acetonitrile/water (18/1/1) so that the final concentration of the peptide was 2.5 mM based on the number of moles of the solid-phase resin, and then adding 10 equivalents of triethylamine. and shaken at 25° C. for 4 hours. The resulting reaction solution was concentrated under reduced pressure using EZ-2 Elite.
- the purity of the target product was calculated from the area ratio of the LC/MS (UV wavelength 225 nm) chromatogram under the following analysis conditions and was 96.90%.
- GFs_c-Met-00014234 (8.0 mg, 3.51 ⁇ mol) was dissolved in DMF (0.2 mL), DIPEA (2.3 ⁇ L, 13 ⁇ mol) in DMF solution (23 ⁇ L) and bis(2,5-dioxopyrrolidine-1 -yl) (3,6,9,12,15,18,21,24,27,30,33-undecaoxapentatriacontane-1,35-diyl) biscarbonate (1.38 mg, 1.67 ⁇ mol) of DMF solution (14 ⁇ L) was added, and the mixture was stirred at 25° C. for 16 hours.
- the purity of the target product was calculated from the area ratio of the LC/MS (UV wavelength 225 nm) chromatogram under the following analysis conditions and was 96.42%.
- the cyclic peptide (GFs_c-Met-00014234) (8.0 mg, 3.51 ⁇ mol) synthesized in Example 6-1 was dissolved in DMF (0.25 mL), and a DMF solution (20 ⁇ L) of triethylamine (2.0 ⁇ L, 14 mmol) ) and bis(2,5-dioxopyrrolidin-1-yl) 4,7,10,13,16,19,22,25,28,31,34,37,40,43,46,49,52-
- a DMF solution (18 ⁇ L) of heptadecaoxapentententacontanedioate (1.75 mg, 1.65 ⁇ mol) was added and stirred at 25° C. for 16 hours.
- the purity of the target product was calculated from the area ratio of the LC/MS (UV wavelength 225 nm) chromatogram under the following analysis conditions and was 94.19%.
- GFs_c-Met-00014234 (8.0 mg, 3.51 ⁇ mol) was dissolved in DMF (0.25 mL), triethylamine (2.0 ⁇ L, 14 ⁇ mol) in DMF (20 ⁇ L) and bis(2,5-dioxopyrrolidine-1). -yl) 4,7,10,13,16,19,22,25,28-nonoxahentriacontanedioate (1.17 mg, 1.65 ⁇ mol) in DMF (12 ⁇ L) was added and the mixture was heated at 25° C. for 16 hours. Stirred.
- the purity of the target product was calculated from the area ratio of the LC/MS (UV wavelength 225 nm) chromatogram under the following analysis conditions and was 94.56%.
- RPTEC Human proximal renal tubular epithelial cells
- REBM Renal Epithelial Cell Basal Medium
- FBS 2.4 mM L-Alanyl-L-Glutamine + 10 nM Triiodothyronine + 10 ng /mL rh EGF + 100 ng/mL Hydrocortisone Hemisuccinate + 5 ⁇ g/mL rh Insulin + 1 ⁇ M Epinephrine + 5 ug/mL Transferrin) (ATCC).
- FIG. 3 shows the results after 3 days, where a is MOCK (no addition), b is 1.6 nM EGF, c is 2 nM HGF, and d is 2 nM peptide complex (peptide complex No. 49 in Table 4).
- FIG. 4 shows the results after 8 days. 34) and linker (SEQ ID NO: 37) conjugate (GFs_c-Met-00014336-PEG13 dimer; peptide conjugate No. 49 in Table 4) added in wells.
- linker SEQ ID NO: 37
- GFs_c-Met-00014336-PEG13 dimer peptide conjugate No. 49 in Table 4
- FIG. 4f showed that not only tube formation but also branch formation was promoted. Since tube formation requires multifunctional actions such as cell proliferation, migration, and collagen degradation, the peptide complex of the present invention was shown to have physiological activity similar to that of HGF.
- Human Phospho-RTK Array Assay A431 cells were cultured in DMEM containing 10% FBS (Gibco), high glucose, GlutaMAX (registered trademark) Supplement, pyruvate (Thermo Fisher Scientific). The cells were detached using Accutase (registered trademark) (Innovative cell technologies), seeded in a 6-well plate at 1,000,000 cells per well, and cultured overnight. For starvation the following day, the assay medium was replaced with an assay medium (DMEM containing 0.1% BSA (Sigma), high glucose, GlutaMAX (registered trademark) Supplement, pyruvate (Thermo Fisher Scientific)) and cultured overnight. .
- FBS Gibco
- GlutaMAX registered trademark
- pyruvate Thermo Fisher Scientific
- This invention can be used in the pharmaceutical industry and the biotechnology industry.
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Abstract
Description
これら再生医療や研究においては,目的となる細胞を効率的に培養し増殖させる工程が重要となる。
幹細胞をはじめヒト細胞の培養において培地成分は重要な役割を果たしているが,特にその中でも成長因子(GFと称することもある)は最も重要な要素のひとつである。しかし,成長因子は一般的に非常に高価であり,かつ,例えば幹細胞を用いた研究においては未分化状態の細胞を維持するなどのために多量が必要となる。
また,成長因子の一つ肝細胞増殖因子(HGF:hepatocyte growth factor receptor)とその受容体であるc-Met(c-Met又はMetと称することもある)は,医薬品のターゲットとしても研究が進んでいる。
c-Metは1回膜貫通型の受容体型チロシンキナーゼで,リガンドであるHGFがc-METに結合すると,c-METは二量体化し活性化される。c-Metの活性化は胚発生,器官形成,創傷治癒に必須であることが知られており,例えばHGFと受容体c-Metの結合は,関連するシグナル伝達経路を活性化し,特異的に内皮細胞の増殖及び機能を促進・維持し,血管新生を促進し,さらに血管新生から側副循環を形成することが知られている。そのため,c-Metの活性化作用を有する化合物が求められており,研究が進んでいる。
そのような中,特許文献1では,c-Metアゴニスト活性を有する抗体が報告されている。また,非特許文献1では,現在までに開発が進んでいるHGFの代替物が報告されている。
また近年,低分子や抗体等の高分子に変わる中分子化合物として,ペプチド,特に環状ペプチドの医薬組成物等としての利用が注目されている。例えば,特許文献2及び非特許文献2には,c-Metタンパク質アゴニストとして利用可能なペプチド複合体が記載されている。当該c-Metタンパク質アゴニストとして利用可能なペプチド複合体は,細胞の増殖や遊走を促進させることが知られており,この細胞増殖作用を用いて医薬品や細胞培養時の培地組成物など,様々な用途への応用が期待されている。例えば,再生医療に用いられる細胞や組織の培養時に添加する成長因子代替物,臓器移植時の臓器保護剤,再生促進剤,及び肝細胞増殖因子の発現低下を来す疾患のための治療薬としての有用性が挙げられる。
ペプチドAは,X1-X2-X3-V-S-X4-D-X5-D-X6-P-R-W-X7-MeC(配列番号1)に記載のアミノ酸配列からなるペプチドであるか,又は配列番号1に記載のアミノ酸配列において1~3個のアミノ酸が,置換,欠失,付加又は挿入されたアミノ酸配列からなるc-Metタンパク質と結合するペプチドである。
X1は,N-アルキル化されてもよいアミノ酸である。
X2は,任意のアミノ酸である。
X3は,任意のアミノ酸である。
X4は,N-アルキル化されてもよい疎水性アミノ酸である。
X5は,任意のアミノ酸である。
X6は,置換を有してもよいアルキル鎖を側鎖に有するアミノ酸又はSである。
X7は,任意のアミノ酸である。
c-Metタンパク質は,肝細胞増殖因子(HGF)受容体であり,チロシンキナーゼ活性を有する。c-Metタンパク質は,ジスルフィド結合で結合したαサブユニット及びβサブユニットで構成される膜貫通型受容体である。c-Metタンパク質は,生体内で,HGFが結合することにより二量体化され,続いて自己リン酸化が起こり,各種のシグナル伝達が活性化される。その結果,MAPK経路やAkt経路のシグナル伝達が活性化されることにより,細胞増殖が促進される一方で,細胞のアポトーシス誘導が阻害される。この機能を亢進させて細胞の増殖や遊走を促進させることができれば,再生医療に用いられる細胞製剤などの製造や,肝硬変などの難治性臓器疾患の治癒を促進できる可能性がある。
c-Metタンパク質は,c-Met,MET又はHGFRともよばれる。ヒトのc-Metタンパク質のGenBankアクセッション番号はNP_000236であり,マウスのc-Metタンパク質のGenBankアクセッション番号はNP_032617である。
肝細胞増殖因子(HGF)は,多機能サイトカインとして,広範な組織および細胞種に対する増殖因子として機能する因子であり,分子量約6万の重鎖と約3.5万の軽鎖がジスルフィド結合したヘテロダイマー構造を有する。HGFは上皮系細胞,内皮細胞や間葉系細胞の増殖を促進することが知られており,他にも形態形成誘導,細胞運動性亢進,抗アポトーシスや血管新生作用などの働きを有する。ヒトのHGFのGenBankアクセッション番号はNP_000592であり,マウスのHGFのGenBankアクセッション番号はNP_001276387である。ヒトHGFであることが好ましく,本明細書において特記しない限りHGFはヒトHGFを示す。
c-Metタンパク質と結合するとは,ペプチド又はペプチド複合体が,c-Metタンパク質と結合することを意味する。c-Metタンパク質と結合するか否かは,公知の分子間結合を測定する方法によって測定することができ,例えば,表面プラズモン共鳴(SPR)アッセイ,スキャチャード解析ならびに/または放射免疫アッセイ(RIA),酵素免疫アッセイ(EIA)およびサンドイッチ競合アッセイなどの競合結合アッセイ,ならびに当技術分野でそれ自体公知であるその異なるバリアントを含む,それ自体公知である任意の適切な様式で決定することが可能である。好ましくは,例えば,特許第6426103号公報(特許文献2)に記載された表面プラズモン共鳴(SPR)分光による評価である。また,c-Metアゴニスト活性を有する化合物は,c-Metタンパク質と結合することでc-Metアゴニスト活性を示すため,c-Metアゴニスト活性を評価すること,すなわちc-Metアゴニスト活性の有無により,当該ペプチド又は複合体が,c-Metタンパク質と結合したか否かを間接的に評価することが可能である。なお,複合体においては,当該複合体の一部又は全部がc-Metタンパク質に結合可能であれば当該複合体はc-Metタンパク質と結合するという。例えば,当該複合体がペプチドAを含む場合においては,当該複合体におけるペプチドAの部分が,c-Metタンパク質と結合する部位であってもよく,当該複合体に含まれる他の部分もc-Metタンパク質に結合してもよい。
c-Metアゴニスト活性とは,c-Metタンパク質と結合し,HGFが有する活性と類似の影響を示す活性をいう。ペプチド又はペプチド複合体がc-Metアゴニスト活性を有するか否かは,公知の方法によって測定することができ,例えば,実施例に示されるように,ホスホ-c-Met AlphaLISAアッセイや,HUVEC細胞増殖試験などを用いて,c-Metアゴニスト活性を評価できる。また,特許第6426103号公報(特許文献2)に記載されたELISA法を用いて,c-Metのリン酸化能を評価することもできる。
c-Metアゴニスト活性を有するペプチド複合体が治癒できる疾病の例は,虚血性心疾患,急性肝炎,劇症肝炎,肝硬変,胆道閉鎖症,脂肪肝,急性腎不全,慢性腎不全,糖尿病性腎症,急性肺炎,肺線維症,血管障害,心筋梗塞,拡張型心筋症,皮膚潰瘍,脳梗塞,閉塞性動脈硬化症,胃潰瘍及び筋萎縮性側索硬化症などであり,それら疾病の治療に使用できる。
ペプチド複合体は,c-Metタンパク質と結合するペプチドAを含むペプチド複合体である。このペプチド複合体は,ペプチドAを1つ又は2つ以上含む。ペプチド複合体は,ペプチドAを2つ含むものが好ましい。また,ペプチドAを1つ含むペプチド複合体の例は,限定されるものでは無いが,例えば,ペプチドAと,c-Metタンパク質に送達したい物質(ペイロード),例えば公知の医薬組成物等とを含むペプチド複合体や,ペプチドAと蛍光タンパク質などのマーカーとなる組成物を含むペプチド複合体である。公知の医薬組成物とペプチドAとの複合体の場合は,ペプチドAのc-Metタンパク質への結合能を利用して,c-Metに送達したい医薬組成物をc-Metタンパク質に送達することが可能となる。
c-Metタンパク質に送達したい物質としては特に限定はなく,当業者の希望する何らの物質であってよい。該物質の例としては,限られないが,以下が挙げられる:
化合物:低分子化合物,中分子化合物だけではなく,細胞のサイトーシス機構で導入可能な化合物であれば何でもよい。例えば公知の低分子薬剤が挙げられる。
ペプチド:体内の標的に結合して何らかの効果を示すペプチドであってよく,例えば環状ペプチドであってよい。
RI:放射性同位元素でラベルした低分子,中分子化合物や抗体等,放射性同位元素でラベルできる化合物であれば何でもよい。例えば,PET検査用の化合物が挙げられる。
タンパク質:抗体,酵素等の,体内にて有用な機能を示すタンパク質であれば何でもよい。例えば,酵素補充療法に用いられる酵素が挙げられる。
核酸:DNA,RNA等,塩基配列を含むものであれば何でもよい。例えば,核酸医薬品が挙げられる。
DDS:リポソームやミセルなどのDDS分子であってよい。当該DDS分子には内部にさらに医薬品などの化合物が含まれていてもよい。
及び,上記に挙げたそれらの複合体であってよい。
このペプチド複合体は,(1)第1のペプチドと,(2)第2のペプチドと,(3)第1のペプチド及び第2のペプチドをつなぐリンカーのみからなるペプチド複合体であってもよい。
このペプチド複合体は,第1のペプチド及び第2のペプチドの少なくとも一方は,ペプチドAである。
第1のペプチド及び第2のペプチドは,同一でも異なってもよいが,ペプチドAであることが好ましい。
つまり,ペプチド複合体は,ヘテロダイマーであってもホモダイマーであってもよい。ヘテロダイマーは,第1のペプチド及び第2のペプチドが,異なるペプチド(例えばアミノ酸配列の異なるペプチドA)である。ホモダイマーは,第1のペプチド及び第2のペプチドが,同じペプチドAである。好ましいペプチド複合体は,ホモダイマーである。
この明細書は,ペプチドAを含む複合体のみならずペプチドAも記載する。
ペプチドAは,
(1)X1-X2-X3-V-S-X4-D-X5-D-X6-P-R-W-X7-MeC(配列番号1)に記載のアミノ酸配列からなるc-Metタンパク質と結合するペプチドであるか,又は
(2)配列番号1に記載のアミノ酸配列において1~3個(1個,2個又は3個)のアミノ酸が,置換,欠失,付加又は挿入されたアミノ酸配列からなるc-Metタンパク質と結合するペプチドである。この(2)のペプチドにおいても,配列番号1における4番目のV,5番目のS,7番目のD,9番目のD,11番目のP,12番目のR,13番目のW,及び15番目のMeCが維持されているものが好ましい。
X2は,任意のアミノ酸であり,好ましくは親水性アミノ酸,脂肪族・分岐鎖アミノ酸又は芳香族アミノ酸であり,さらに好ましくはV,T,E,Q,又はWである。最も好ましいX2は,Tである。
X3は,任意のアミノ酸であり,親水性アミノ酸,脂肪族アミノ酸又は芳香族アミノ酸であり,さらに好ましくはA,R,Y,又はDである。最も好ましいX3は,Aである。
X4は,N-アルキル化されてもよい疎水性アミノ酸であり,好ましくはN-メチル化されてもよい疎水性アミノ酸であり,さらに好ましくはN-メチル化されていてもよいF又はN-メチル化されてもよいLである。最も好ましいX4は,MeF(N-メチル化されたF)である。
X5は,任意のアミノ酸であり,好ましくは親水性アミノ酸,脂肪族・分岐鎖アミノ酸又はPであり,さらに好ましくはD,E,S,P又はVである。最も好ましいX5は,Eである。
X6は,置換を有してもよいアルキル鎖を側鎖に有するアミノ酸又はSであり,好ましくは(S)-2-アミノヘプタン酸(Ahp),R,L-ノルロイシン(Nle), (S)-2,7-ジアミノヘプタン酸(Hty),又はSである。さらに好ましいX6は,Ahpである。
X7は,任意のアミノ酸であり,好ましくは親水性アミノ酸又は脂肪族アミノ酸であり,さらに好ましくはS,A,L-α-アミノブタン酸(Abu),D,Q,又はVである。最も好ましいX7は,Sである。
(1)MeF-T-A-V-S-MeF-D-E-D-Ahp-P-R-W-S-MeC(配列番号34)に記載のアミノ酸配列からなるペプチドであるか,又は
(2)配列番号34に記載のアミノ酸配列において1~3個のアミノ酸が,置換,欠失,付加又は挿入されたアミノ酸配列からなり,c-Metタンパク質と結合するペプチドである。
特定の配列から,1個,2個又は3個のアミノ酸残基が置換,欠失,付加又は挿入される場合,保存的アミノ酸置換がなされることが好ましい。「保存的アミノ酸置換(conservative amino acid substitution)」とは,機能的に等価または類似のアミノ酸との置換を意味する。ペプチドにおける保存的アミノ酸置換は,該ペプチドのアミノ酸配列に静的変化をもたらす。例えば,同様の極性を有する一つまたは二つ以上のアミノ酸は機能的に等価に作用し,かかるペプチドのアミノ酸配列に静的変化をもたらす。一般に,あるグループ内の置換は構造および機能について保存的であると考えることができる。しかしながら,当業者には自明であるように,特定のアミノ酸残基が果たす役割は当該アミノ酸を含む分子の三次元構造における意味合いにおいて決定され得る。例えば,システイン残基は,還元型の(チオール)フォームと比較してより極性の低い,酸化型の(ジスルフィド)フォームをとることができる。アルギニン側鎖の長い脂肪族の部分は構造的および機能的に重要な特徴を構成し得る。また,芳香環を含む側鎖(トリプトファン,チロシン,フェニルアラニン)はイオン-芳香族相互作用または陽イオン-pi相互作用に寄与し得る。かかる場合において,これらの側鎖を有するアミノ酸を,酸性または非極性グループに属するアミノ酸と置換しても,構造的および機能的には保存的であり得る。プロリン,グリシン,システイン(ジスルフィド・フォーム)等の残基は主鎖の立体構造に直接的な効果を与える可能性があり,しばしば構造的ゆがみなしに置換することはできない。
保存的アミノ酸置換は,以下に示すとおり,側鎖の類似性に基づく特異的置換(レーニンジャ,生化学,改訂第2版,1975年刊行,73乃至75頁:L. Lehninger, Biochemistry, 2nd edition, pp73~75, Worth Publisher, New York (1975))および典型的置換を含む。
疎水性(非極性とも言う)アミノ酸:疎水性(非極性)を示すアミノ酸であって,アラニン(「Ala」または単に「A」とも記す),グリシン(「Gly」または単に「G」とも記す),バリン(「Val」または単に「V」とも記す),ロイシン(「Leu」または単に「L」とも記す),イソロイシン(「Ile」または単に「I」とも記す),プロリン(「Pro」または単に「P」とも記す),フェニルアラニン(「Phe」または単に「F」とも記す),トリプトファン(「Trp」または単に「W」とも記す),チロシン(「Tyr」または単に「Y」とも記す),メチオニン(「Met」または単に「M」とも記す)を含む。
なお,疎水性アミノ酸はさらに以下のグループに分けることもできる。
脂肪族アミノ酸:側鎖に脂肪酸又は水素を有するアミノ酸であって,Ala,Gly,Val,Ile,Leuを含む。
脂肪族・分岐鎖アミノ酸:側鎖に分岐型脂肪酸を有するアミノ酸であって,Val,Ile,Leuを含む。
芳香族アミノ酸:側鎖に芳香環を有するアミノ酸であって,Trp,Tyr,Pheを含む。親水性(極性とも言う)アミノ酸:親水性(極性)を示すアミノ酸であって,セリン(「Ser」または単に「S」とも記す),スレオニン(「Thr」または単に「T」とも記す),システイン(「Cys」または単に「C」とも記す),アスパラギン(「Asn」または単に「N」とも記す),グルタミン(「Gln」または単に「Q」とも記す),アスパラギン酸(「Asp」または単に「D」とも記す),グルタミン酸(「Glu」または単に「E」とも記す),リジン(リシンとも記する。「Lys」または単に「K」とも記す),アルギニン(「Arg」または単に「R」とも記す),ヒスチジン(「His」または単に「H」とも記す)を含む。
なお,親水性アミノ酸はさらに以下のグループに分けることもできる。
酸性アミノ酸:側鎖が酸性を示すアミノ酸であって,Asp,Gluを含む,
塩基性アミノ酸:側鎖が塩基性を示すアミノ酸であって,Lys,Arg,Hisを含む。
中性アミノ酸:側鎖が中性を示すアミノ酸であって,Ser,Thr,Asn,Gln,Cysを含む。
また,Gly及びProについては,「主鎖の方角に影響を与えるアミノ酸」に分けることもでき,側鎖に硫黄分子を含むアミノ酸,Cys及びMetは,「含硫アミノ酸」に分けることもできる。
なお,天然のアミノ酸の側鎖に官能基等の構造が付加または置換等されることで,天然のアミノ酸とは異なる性質を付与することができる。例えば,A4pは側鎖にピペリジル基が付加されたアラニンであるが,当該ピペリジル基が付加されたことで,非極性アミノ酸グループに属するアラニンとは異なり,塩基性という極性を示す。
すなわち,天然のアミノ酸をその共通する側鎖の性質に基づいて分けた,前述のグループに,同様の側鎖の性質を有する非天然アミノ酸を含めることが出来る。例えば,塩基性アミノ酸に属するアルギニンのN-メチル化アミノ酸であるN-メチルアルギニン(MeR)は,非天然アミノ酸であるが,塩基性を示すため,塩基性アミノ酸に分類することができる。このように,あるアミノ酸と同様の側鎖の性質を示す非天然アミノ酸についても,保存的アミノ酸置換の対象として含むことができる。
非限定的に,非天然のアミノ酸には,N-メチルアミノ酸,Ahp,Nle,Hty,Abu等を含む。例えば,Ahp,Nle,Abu,Htyは疎水性アミノ酸に分けることができ,さらに,Ahp,Nle,Abuは脂肪族アミノ酸,Htyは芳香族アミノ酸に分けることもできる。なお,N-メチルアミノ酸については,N-アルキルアミノ酸として分類することもでき,N-メチル化されていない元のアミノ酸の側鎖の性質に従い分類することもできる。
ペプチドとは,アミノ酸が複数連続した構造をいい,ポリペプチド,たんぱく質をもその意味に包含する。なお,本願においてアミノ酸とは,天然に存在するアミノ酸(天然アミノ酸)だけではなく,天然に存在しないアミノ酸(非天然アミノ酸)をも包含する。
また,本願においては,合成後環状化により環状部が形成されたペプチド,当該ペプチドをさらに化学修飾して得られるペプチド,ペプチドとペプチドに結合した物質の複合体も,本発明のペプチドに含まれる。
ペプチドAのペプチド長(アミド結合の数)は特に限定されないが,総アミノ酸残基(ペプチドに結合した物質又は当該物質とペプチドを結合するリンカーがアミノ酸を含む場合は,それらのアミノ酸は含めない)が,20残基以内が好ましい。好ましくはアミノ酸が6以上,7以上,8以上,9以上,10以上,11以上であり,好ましくはアミノ酸が19以下,18以下,17以下,16以下,15以下である。
この明細書は,ペプチドA(c-Metタンパク質結合ペプチド)をコードする核酸をも記載する。 本明細書において「核酸」は,天然であっても非天然であってもよく,DNA,RNA,及びこれらのキメラを含むが,これらに限定されない。
ペプチド複合体に用いられるリンカーは,ペプチド複合体がc-Metタンパク質と結合できる限り,その種類や長さは特に限定されない。リンカーの例は,アミノ酸リンカー(ペプチドリンカー),化学リンカー,脂肪酸リンカー,核酸リンカー,糖鎖リンカーなどがあり,例えば化学リンカーとペプチドリンカーなどの複合体であってもよい。化学リンカーとしては,例えば,PEG(Polyethyleneglycol)リンカーが挙げられる。また,リンカーは,脂肪酸から誘導される二価化学部分を含む脂肪酸リンカーでもよい。アミノ酸(ペプチド)リンカーは,少なくとも1個の任意のアミノ酸を含むリンカーであり,例えば,米国特許第7,271,149号に記載のような,配列[Gly-Gly-Gly-Gly-Ser]n(式中,nは1,2,3,4,5または6である)を有するペプチドなどのグリシン-リッチペプチドや,米国特許第5,525,491号に記載のセリン-リッチペプチドリンカーを用いることができる。それらリンカーは,公知の方法又はそれに準ずる方法でc-Metタンパク質結合ペプチドに結合させることができる。例えば,c-Metタンパク質結合ペプチドの末端のCys残基にリンカーを結合させることで,リンカーをc-Metタンパク質結合ペプチドに結合させることができる。また,c-Metタンパク質結合ペプチドのC末端以外に含まれるアミノ酸にリンカーを結合させることもできる。
上記したペプチド複合体は,c-Metタンパク質の多量体化により自己リン酸化を促進することを通じて,HGF様の機能を有する。よって,上記したペプチド複合体は,c-Metアゴニスト(作動薬)や,c-Metタンパク質アゴニストを含む医薬組成物として有用である。
この明細書は,上記したペプチド複合体と薬学的に許容される担体とを含む,医薬組成物をも提供する。上記したペプチド複合体のうち,c-Metタンパク質アゴニストを含む医薬組成物は,虚血性心疾患,急性肝炎,劇症肝炎,肝硬変,胆道閉鎖症,脂肪肝,急性腎不全,慢性腎不全,糖尿病性腎症,急性肺炎,肺線維症,血管障害,心筋梗塞,拡張型心筋症,皮膚潰瘍,脳梗塞,閉塞性動脈硬化症,胃潰瘍及び筋萎縮性側索硬化症からなる群より選択される疾患の治療又は予防に用いられる。
医薬組成物中のペプチドは,代謝及び排泄されやすい性質に鑑みて,各種の修飾を行うことができる。例えば,ポリペプチドにポリエチレングリコール(PEG)や糖鎖を付加して血中滞留時間を長くし,抗原性を低下させることができる。また,ポリ乳酸・グリコール(PLGA)などの生体内分解性の高分子化合,多孔性ヒドロキシアパタイト,リポソーム,表面修飾リポソーム,不飽和脂肪酸で調製したエマルジョン,ナノパーティクル,ナノスフェア等を徐放化基剤として用い,これにポリペプチドを内包させてもよい。経皮投与する場合,弱い電流を皮膚表面に流して角質層を透過させることもできる(イオントフォレシス法)。
製剤化は,例えば,賦形剤,結合剤,崩壊剤,滑沢剤,溶解剤,溶解補助剤,着色剤,矯味矯臭剤,安定化剤,乳化剤,吸収促進剤,界面活性剤,pH調整剤,防腐剤,抗酸化剤などを適宜使用し,常法により行うことができる。
この明細書は,対象(例えば哺乳類や患者)に,有効量のペプチド複合体,又は有効量の医薬組成物を投与する工程を含む,上記した各種疾患の治療方法をも提供する。また,この明細書は,上記した医薬組成物の製造における,ペプチドA,又は上記したペプチド複合体の使用や,ペプチドA,又は上記したペプチド複合体を用いる上記した医薬組成物の製造方法をも記載する。
この明細書は,上記したペプチド複合体を含む培養用培地添加物や,ペプチド複合体を含む培養用培地をも提供する。この培養用培地添加物は,哺乳類由来の細胞又は組織を培養するために用いられる。培養する細胞の例としては,これに限定されるものでは無いが,体細胞,生殖細胞や,生体を構成する全ての組織や細胞へ分化し得る能力を有する細胞である多能性幹細胞が挙げられる。多能性幹細胞としては,例えば,ES細胞,精子幹細胞,多能性生殖幹細胞,胚性生殖細胞,iPS細胞,培養線維芽細胞又は骨髄幹細胞由来の細胞が挙げられる。また,それら幹細胞と体細胞との融合細胞であってもよく,ストレスや細胞刺激によって誘導・選抜される多能性幹細胞や,体細胞の核を核移植することによって作成された初期胚を培養することによって樹立した多能性幹細胞であってもよい。また,培養する組織の例としては,細胞から分化された組織や,身体から取り出された組織が挙げられる。例えば,この培養用培地添加物は,再生した組織や臓器移植のための臓器の保護等に使用することが可能である。
細胞又は組織は,ヒト,サル,チンパンジー等の霊長目由来の細胞又は組織であることが好ましく,より好ましくはヒト由来である。
培養用培地添加物は,溶液の形態であっても,乾燥した固体(例えば,固形状,粉末状等)の形態であってもよい。溶液の形態である場合には,そのまま培養用の培地として用いてもよいし,溶媒で希釈し,必要に応じて上述した添加剤を加えたものを,培養用の培地として用いてもよい。希釈する際に用いる溶媒としては,例えば,水,緩衝液,生理食塩水,各種細胞や組織培養に用いられる培地等が挙げられ,これらは単独で用いても,2種以上を組み合わせて用いてもよい。
培養用培地添加物が乾燥した固体の形態である場合には,例えば,水,緩衝液,生理食塩水,各種細胞や組織培養に用いられる培地等の溶媒に溶解し,必要に応じて上述した添加剤を加えたものを,培養用の培地として用いてもよい。
細胞又は組織を培養するための培地中,又はこれから得られた細胞用の培地中の本発明のペプチド複合体の含有量は,培養する細胞または組織によって当業者が任意に設定することができるが,例えば,組成物全量又は培地全量に対して,最終濃度として,約0.01~約10000nmol/L,好ましくは約0.1~約1000nmol/L,より好ましくは約0.5~約1000nmol/L,更に好ましくは約1~約100nmol/Lであり得る。
上記したペプチドAは,c-Metタンパク質と結合する性質を有する。このため,ペプチドAやペプチドAを含むペプチド複合体は,公知のc-Metタンパク質へ送達したい物質,例えば薬剤と結合することで,DDSキャリア(薬剤送達用担体)や,薬剤送達用複合体として機能する。この明細書は,そのようなDDSキャリアや薬剤送達用複合体をも開示する。ペプチドAやペプチド複合体と,薬剤とは,公知の方法を用いて,結合させることができる。
オングストローム(単位)としてÅ;
ウシ血清アルブミンとしてBSA;
ジメチルスルホキシドとしてDMSO;
ジメチルホルムアミドとしてDMF;
N,N-ジイソプロピルエチルアミンとしてDIPEAもしくはDIEA;
3,6-ジオキサー1,8-オクタン-ジチオールとしてDODT;
ダルベッコ改変イーグル培地としてDMEM
50%効果濃度としてEC50;
上皮成長因子(Epidermal Growth Factor)としてEGF;
9-フルオレニルメチルオキシカルボニルとしてFmoc;
ウシ胎児血清としてFBS;
N2,N6-ビス(((9H-フルオレン-9-イル)メトキシ)カルボニル)-L-リジンとしてFmoc-Lys(Fmoc)-OH;
グラム(単位)としてg;
O-(7-アザベンゾトリアゾールー1-イル)-N,N,N’,N’-テトラメチルウロニウムヘキサフルオロりん酸塩としてHATU;
HGF受容体としてHGFR;
液体クロマトグラフィー質量分析計としてLC-MSもしくはLC/MS;
ミリリットル(単位)としてmL;モーラー(単位)としてM;マイクロリットル;
(単位)としてμL;
ミリモーラー(単位)としてmM;
ミリグラム(単位)としてmg;
アセトニトリルとしてMeCN;
分(単位)としてmin;
ミリメートル(単位)としてmm;
ナノメートル(単位)としてnm;
腎上皮細胞用基本培地(Renal Epithelial Cell Basal Medium)としてREBM;
回転毎分(単位)としてrpm;
トリフルオロ酢酸としてTFA;
トリイソプロピルシランとしてTIS
MeF N-メチル-L-フェニルアラニン
MeA N-メチル-L-アラニン
Ahp (S)-2-アミノヘプタン酸
Nle L-ノルロイシン
Hty (S)-2-アミノ―4-(4-ヒドロキシフェニル)ブタン酸
Abu (S)-2アミノブタン酸
MeC N-メチル-L-システイン
PEG4c 1-アミノ-3,6,9,12-テトラオキサ-15-ペンタデカン酸
PEG8c 1-アミノ-3,6,9,12-テトラオキサペンタデカン-15-オイック酸
PEG12c 1-アミノ-3,6,9,12,15,18,21,24,27,30,33,36-ドデカオキサノナトリアコンタン-39-オイック酸
cPEG1c 3,3‘-オキシジプロピオン酸
cPEG9c 4,7,10,13,16,19,22,25,28-ノナオキサヘントリアコンタンジオイック酸
cPEG17c 4,7,10,13,16,19,22,25,28,31,34,37,40,43,46,49,52-ヘプタデカオキサペンタペンタコンタンジオイック酸
OCOPEG13OCO 3,6,9,12,15,18,21,24,27,30,33-ウンデカオキサペンタトリアコンタン-1,35-ジイルビス(炭酸水素塩)
以下の実施例における化学合成において使用された全ての原料、ビルディングブロック、試薬、酸、塩基、固相樹脂、溶媒は、市販品をそのまま用いたか、もしくは当業者にて有機化学的手法を用いて合成できるものである。なお、保護基を含むアミノ酸は特記が無い限り市販品をそのまま用いた。
固相樹脂におけるペプチド鎖の伸長は、それぞれの実施例に記載された樹脂を出発原料とし、通常用いられるペプチドカップリング反応条件とFmoc除去反応条件を用いて行った。反応はペプチド自動合成機であるBiotage社のSiro Iを使用し、製造元のマニュアルに従い行った。使用される一般的なアミノ酸を下記に列挙し、側鎖保護基はカッコ内に示した。
Fmoc-Trp(Boc)-OH;Fmoc-Thr(tBu)-OH;Fmoc-N-Me-Gly-OH;Fmoc-Asp(OtBu)-OH;Fmoc-N-Me-Phe-OH;Fmoc-Ala-OH;Fmoc-N-Me-Ala-OH;Fmoc-His(Trt)-OH;Fmoc-Tyr(tBu)-OH;Fmoc-Val-OH;Fmoc-HydPro(tBu)-OH;Fmoc-Cys(Trt)-OH;Fmoc-Lys(Mtt)-OH;Fmoc-Ser(tBu)-OH;Fmoc-N-Me-Ser(tBu)-OH。
得られた粗精製ペプチドの精製方法として、Waters社AutoPurification System-SQD2 single quadruple mass spectrometerで逆相分取HPLCを使用し、目的物由来のm/zイオンをモニタリングしながら溶出した。ESI-positiveのスキャンモードで得られるマススペクトルと目的物の分子式より計算される多価イオンを含むマススペクトルが使用した質量分析器の誤差範囲で一致しているのを確認した。なお、使用したカラムを含む精製条件はそれぞれの実施例に示した。
化学合成されたペプチドの構造決定は、目的配列に従って用いたアミノ酸と必要に応じて用いたビルディングブロックを考慮し計算された分子量を、質量スペクトル分析法におけるESI-MS(+)により確認した。なお、”ESI-MS(+)”とは、正イオンモードで実施したエレクトロスプレーイオン化質量スペクトル分析法を示す。検出された質量は“m/z”単位表記によって報告された。なお、分子量がおおよそ1000より大きい化合物は、2価イオンまたは3価イオンとして高頻度で検出された。
c-Metアゴニストペプチドは、Recombinant Human HGF R/c-MET Fc Chimera His-tag Protein (R&D systems社)をターゲットとし、国際公開WO2014/119600号、国際公開 WO2012/033154号、又は国際公開 WO2007/066627号に記載されているスクリーニング方法で、同定した。当該ペプチドが実際にc-Metアゴニスト活性を持つかどうかを確認する目的で、それらのペプチドを化学合成した。なお、ペプチド2つがリンカーで結合した、ホモダイマーの形(ペプチド複合体)で合成した。合成したペプチド複合体に含まれるペプチド部分のアミノ酸配列を、表1に示し、リンカー配列を表2に示す。また、合成したペプチド複合体(ペプチドとリンカーの組合せ)については表3及び4に示す。
[実施例3-1]
表3に記載のペプチド複合体については、他に合成実施例が無い限り、以下に記載のペプチド複合体と同様に合成した。なお、表3におけるESI-MS(m/z)は、ESI-MS(+)観測値を示し、[M+XH]X+は、その場合におけるプロトン付加数を(M+XH)X+として示したときのXの値を示す。
GFs_c-Met_0012_7複合体(GFs_c-Met_0012_7-PEG12c-Kダイマー:表3におけるペプチド複合体No.8)の合成
得られた混合物をギルソン社のASPEC(登録商標) C18カートリッジを用いて固相抽出した。得られた抽出液をEZ-2 Eliteを用いて減圧濃縮した。
LC-MSで分析し、目的物のマススペクトルは主たるピークの一つに観測された。
分析条件:保持時間=1.73分;カラム:Kinetex(登録商標) EVO C18 1.7 μm 2.1 x 50mm, 100Å;移動相:A = 0.025% TFA in H2O、B = 0.025% TFA in MeCN;温度:60 ℃;グラジエント(% B conc):2.10分間かけて5-95%、その後0.75分間かけて 95-95%;流量:0.6mL/min
ESI-MS(+) 観測値m/z= 1725.0(M+3H)3+ 理論値m/z=5170.91
表4に記載のペプチド複合体については、他に合成実施例が無い限り、以下に記載のペプチド複合体と同様に合成した。なお、表4におけるESI-MS(m/z)は、ESI-MS(+)観測値を示し、[M+XH]X+は、その場合におけるプロトン付加数を(M+XH)X+として示したときのXの値を示す。
GFs_c-Met-0012複合体(GFs_c-Met-0012-PEG12ダイマー;表4におけるペプチド複合体No.17)の合成
得られた混合物は以下の条件を用いて精製した(カラム:Waters XSelect(登録商標) C18 19 x 150mm;移動相:A = 0.1% TFA in H2O,B = 0.1% TFA in MeCN;温度:40 ℃;グラジエント(%B conc):3分間かけて13-38%,その後8分間かけて38-43%,その後1分間かけて43-60%;流量:17mL/min。
目的物の純度は以下の分析条件のLC/MS(UV波長225nm)クロマトグラムの面積比から算出し59.97%であった。
ESI-MS(+) 観測値m/z= 1300.6 (M+4H)4+ 理論値m/z=5196.56
本発明のペプチド複合体のc-Metの活性化能(c-Metアゴニスト活性)を評価する為に、c-Metのリン酸化を検証した。
ヒト細胞であるA431細胞を10% FBS(Gibco社)を含むDMEM, high glucose, GlutaMAX(登録商標) Supplement, pyruvate(サーモフィッシャーサイエンティフィック社)で培養した。Accutase(Innovative cell technologies社)を用いて細胞を剥離後、1ウェルあたり10000細胞となるように96穴プレートに播種し、一晩培養した。翌日スタベーションの為0.1% BSA (シグマアルドリッチ社)を含むDMEM, high glucose, GlutaMAX(登録商標) Supplement, pyruvate(サーモフィッシャーサイエンティフィック社)に交換し更に一晩培養した。その後、実施例3で合成したペプチド複合体、又はコントロールとしてRecombinant Human HGF Protein (R&D systems社)を加え、15分刺激後、AlphaLISA(登録商標) SureFire(登録商標) UltraTM Phospho-c-Met (Tyr1234/1235) キット(パーキンエルマー社)に付属するLysis Bufferで細胞を溶解した。アッセイはキットのプロトコールに沿って実施し、シグナルの検出にはSpectraMax(登録商標) Paradigm(登録商標) multimode microplate reader(モレキュラーデバイスジャパン社)を使用した。
得られたシグナルをGraphPad Prism(エムデーエフ社)で解析し、HGFで誘導されるシグナルの最大値を100%として、50%以上の活性化を示すものを2、50%以下の活性化を示すものを1として記載した。その結果を表3に示す。なお、同様にモノマーのペプチドを用いて活性測定を行ったが、c-Metアゴニスト活性は示さなかった。
また、同様にして、C50の値をHGFで誘導されるシグナルの50%の活性を示すペプチドの濃度としてGraphPad Prismで算出した。その結果を表4に示す。なお、本アッセイにおいて、コントロールであるHGFの EC50の値は0.66nMであった。
さらに、ペプチド(配列番号34)とリンカー(配列番号37)の複合体(GFs_c-Met-00014336-PEG13ダイマー;表4における複合体No.49)について、c-Metアゴニスト活性のグラフを図1に示した。当該ペプチド複合体のEC50は0.72 nMであり、HGFとほぼ変わらないc-Metアゴニスト活性を示した。
これらの結果より、本発明のペプチド複合体は、確かにc-Metアゴニスト活性を有することが示された。
本発明のペプチド複合体の生物活性を評価する為に細胞増殖誘導活性を検証した。
正常ヒトさい帯静脈血管内皮細胞(HUVEC)をHuMedia-EG2(クラボウ社)を使用して培養した。 Accutase(Innovative cell technologies社)を用いて細胞を剥離後 5% FBS (MBL社)を含むMedium without serum or growth factors(Cell systems社)に再懸濁し、1ウェルあたり10000細胞となるように96穴プレートに播種し、一晩培養した。翌日、実施例2で合成したペプチド(配列番号34)とリンカー(配列番号37)の複合体(GFs_c-Met-00014336-PEG13ダイマー;表4におけるペプチド複合体No.49)、又はコントロールとしてRecombinant Human HGF Protein(R&D systems社)を加え更に2日間培養した。その後培地を除き、CellTiter-Glo(登録商標) Luminescent Cell Viability Assay試薬(プロメガ社)を用い付属のプロトコールに沿って細胞数を定量した。検出にはSpectraMax(登録商標) Paradigm(登録商標) multimode microplate reader(Molecular Devices社)を使用した。
得られたシグナル値をGraphPad Prismで解析しEC50を算出した。得られた活性のグラフを図2に示した。結果として、HGFのEC50は0.37 nM、当該ペプチド複合体のEC50は0.55 nMと、本発明のペプチド複合体はHGFとほぼ変わらないc-Metアゴニスト活性を示した。
この結果より、本発明のペプチド複合体は、ヒト細胞の増殖を誘導する活性を有することが示された。
[実施例6-1]
表1におけるSEQ ID No.34に記載のアミノ酸配列を有する環状ペプチドの合成
得られた粗生成物は以下の条件を用いて精製し
た(カラム:Waters Xbridge(登録商標) C18 5μm 50 x 150mm;移動相:A = 0.1% TFA in H2O,B = 0.1% TFA in MeCN;温度:40 ℃;グラジエント(%B conc):3分間かけて5-30%,その後8分間かけて30-35%,その後1分間かけて35-60%;流量:120mL/min。
目的物の純度は以下の分析条件のLC/MS(UV波長225nm)クロマトグラムの面積比から算出し96.90%であった。
分析条件:保持時間=3.84分;カラム:Kinetex(登録商標) EVO C18 2.6μm 2.1 x 150mm, 100Å;移動相:A = 0.025% TFA in H2O,B = 0.025% TFA in MeCN;温度:60 ℃;グラジエント(%B conc):7.15分間かけて20-60%,その後0.30分間かけて 60-95%,その後1.55分間かけて95-95%;流量:0.5mL/min
ESI-MS(+) 観測値m/z= 1027.7(M+2H)2+
得られた環状ペプチドを、ペプチド複合体の合成に用いた。
GFs_c-Met-00014336(GFs_c-Met-00014336-PEG13ダイマー;表4におけるペプチド複合体No.49)の合成
得られた混合物は以下の条件を用いて精製した(カラム:Waters XSelect(登録商標) C18 19 x 150mm;移動相:A = 0.1% TFA in H2O,B = 0.1% TFA in MeCN;温度:40 ℃;グラジエント(%B conc):3分間かけて13-38%,その後8分間かけて38-43%,その後1分間かけて43-60%;流量:17mL/min。
目的物の純度は以下の分析条件のLC/MS(UV波長225 nm)クロマトグラムの面積比から算出し96.42%であった。
分析条件:保持時間=5.07分;カラム:Kinetex(登録商標) EVO C18 2.6 μm 2.1 x 150mm, 100Å;移動相:A = 0.025% TFA in H2O,B = 0.025% TFA in MeCN;温度:60 ℃;グラジエント(%B conc):7.15分間かけて20-60%,その後0.30分間かけて 60-95%,その後1.55分間かけて95-95%;流量:0.5mL/min
ESI-MS(+) 観測値m/z= 1177.2(M+4H)4+ 理論値m/z=4703.25
GFs_c-Met-00014305(GFs_c-Met-00014305-PEG17ダイマー;表4におけるペプチド複合体No.50)の合成
得られた混合物は以下の条件を用いて精製した(カラム:Waters XSelect(登録商標) C18 5 μm 19 x 150mm;移動相:A = 0.1% TFA in H2O,B = 0.1% TFA in MeCN;温度:40 ℃;グラジエント(%B conc):3分間かけて12-37%,その後8分間かけて37-42%,その後1分間かけて42-60%;流量:17mL/min。
目的物の純度は以下の分析条件のLC/MS(UV波長225 nm)クロマトグラムの面積比から算出し94.19%であった。
分析条件:保持時間=5.92分;カラム:Kinetex(登録商標) EVO C18 2.6 μm 2.1 x 150mm, 100Å;移動相:A = 0.025% TFA in H2O,B = 0.025% TFA in MeCN;温度:60 ℃;グラジエント(%B conc):7.15分間かけて20-60%,その後0.30分間かけて 60-95%,その後1.55分間かけて95-95%;流量:0.5mL/min
ESI-MS(+) 観測値m/z= 1235.3 (M+4H)4+ 理論値m/z=4935.41
GFs_c-Met-00014318(GFs_c-Met-00014318-PEG9ダイマー;表4におけるペプチド複合体No.51)の合成
得られた混合物は以下の条件を用いて精製した(カラム:Waters XSelect(登録商標) C18 19 x 150mm;移動相:A = 0.1% TFA in H2O,B = 0.1% TFA in MeCN;温度:40 ℃;グラジエント(%B conc):3分間かけて11-36%,その後8分間かけて36-41%,その後1分間かけて41-60%;流量:17mL/min。
目的物の純度は以下の分析条件のLC/MS(UV波長225 nm)クロマトグラムの面積比から算出し94.56%であった。
分析条件:保持時間=5.03分;カラム:Kinetex(登録商標) EVO C18 2.6 μm 2.1 x 150mm, 100Å;移動相:A = 0.025% TFA in H2O,B = 0.025% TFA in MeCN;温度:60 ℃;グラジエント(%B conc):7.15分間かけて20-60%,その後0.30分間かけて 60-95%,その後1.55分間かけて95-95%;流量:0.5mL/min
ESI-MS(+) 観測値m/z= 1147.1(M+4H)4+ 理論値m/z=4582.2
ヒト近位尿細管上皮細胞(RPTEC)を 増殖培地(Renal Epithelial Cell Basal Medium (REBM) + 0.5% FBS + 2.4 mM L-Alanyl-L-Glutamine + 10 nM Triiodothyronine + 10 ng/mL rh EGF + 100 ng/mL Hydrocortisone Hemisuccinate + 5 μg/mL rh Insulin + 1 μM Epinephrine + 5 ug/mL Transferrin)(ATCC)で培養した。Trypsin-EDTAを用いて細胞を剥離し、アッセイ培地(REBM + 0.5% FBS + 2.4 mM L-Alanyl-L-Glutamine + 10 nM Triiodothyronine + 100 ng/mL Hydrocortisone Hemisuccinate + 1 μM Epinephrine + 5 μg/mL Transferrin + 1.8 mM CaCl2)に再懸濁した。
氷上においたCellmatrix(登録商標) Type I-A (新田ゼラチン社)と 濃縮培養液 (新田ゼラチン社)と再構成用緩衝液(新田ゼラチン社)を説明書に従って混合したものにRPTECを再懸濁し、1ウェルあたり200000細胞となるように48ウェルプレートに300 uLずつ分注した。CO2インキュベーター内 (37℃、5% CO2)にて60分間静置することで上記懸濁液をゲル化させた。
アッセイ培地にHGFを2nM、EGFを1.6nM、もしくは実施例2で合成したペプチド(配列番号34)とリンカー(配列番号37)の複合体(GFs_c-Met-00014336-PEG13ダイマー;表4におけるペプチド複合体No.49)を0.08,0.4,2, 10nMとなるように加え、前述のとおりゲル化させた懸濁液が添加されている48ウェルプレートの各ウェルに400 μLずつ添加した。CO2インキュベーター中(37℃、5% CO2)にて静置し、3日毎に培地を交換し培養開始から3日後及び8日後に位相差顕微鏡を用いて管腔形成の有無を観察し評価した。
その結果を図3及び図4に示す。なお、図3は3日後の結果であり、aはMOCK(無添加)、bは1.6nM EGF、cは2nM HGF、dは2nMのペプチド複合体(表4におけるペプチド複合体No.49)を添加したウェルの観察結果である。また、図4 は8日後の結果であり、aは MOCK(無添加)、bは2nM HGF、cは0.08nM、dは0.4nM、eは2nM、fは10nMの濃度で実施例2で合成したペプチド(配列番号34)とリンカー(配列番号37)の複合体(GFs_c-Met-00014336-PEG13ダイマー;表4におけるペプチド複合体No.49)を添加したウェルの観察結果である。
この結果より、本発明のペプチド複合体はHGFと同じく管腔形成を促進することが示された。また、図4fより、管腔形成だけではなく分岐形成も促進されることが示された。管腔形成は細胞の増殖、遊走及びコラーゲン分解等の多機能作用が必要であるため、本発明のペプチド複合体はHGFと同様の生理活性を有することが示された。
A431細胞を10% FBS (Gibco社)を含むDMEM, high glucose, GlutaMAX(登録商標) Supplement, pyruvate(サーモフィッシャーサイエンティフィック社)で培養した。Accutase(登録商標)(Innovative cell technologies社)を用いて細胞を剥離後、1ウェルあたり1000000細胞となるように6ウェルプレートに播種し、一晩培養した。
翌日スタベーションの為、アッセイ培地(0.1% BSA (Sigma社)を含むDMEM, high glucose, GlutaMAX(登録商標) Supplement, pyruvate(サーモフィッシャーサイエンティフィック社))に交換し更に一晩培養した。その後7.8nMのRecombinant Human HGF Protein (R&D systems社)、もしくは2nMの実施例2で合成したペプチド(配列番号34)とリンカー(配列番号36)の複合体(GFs_c-Met-00014336-PEG9ダイマー;表4におけるペプチド複合体No.51)を加え、10分刺激後Proteome Profiler Human Phospho-RTK Array Kit (R&D systems) に付属するLysis Bufferで細胞を溶解した。その後は当該キットのプロトコールに沿って実施し、WesternSure(登録商標) PREMIUM化学発光基質キット(LI-COR)化学発光シグナルはC-DiGit(登録商標)(スクラム社)を用いて検出した。
その結果を図5に示す。なお、図5(2)の aは無添加、bはHGF添加、及びcはペプチド複合体添加の結果であり、ペプチド複合体添加時及びHGF添加時において、HGF Rのみが特異的にリン酸化された。よって、本発明のペプチド複合体はHGFと同様の特異的リン酸化パターンを有することが示された。
Claims (16)
- c-Metタンパク質と結合するペプチドAを含むペプチド複合体であって,
前記ペプチドAは,
X1-X2-X3-V-S-X4-D-X5-D-X6-P-R-W-X7-MeC(配列番号1)に記載のアミノ酸配列からなるペプチドであるか,又は配列番号1に記載のアミノ酸配列において1~3個のアミノ酸が,置換,欠失,付加又は挿入されたアミノ酸配列からなり,
X1は,N-アルキル化されてもよいアミノ酸であり,
X2は,任意のアミノ酸であり,
X3は,任意のアミノ酸であり,
X4は,N-アルキル化されてもよい疎水性アミノ酸であり,
X5は,任意のアミノ酸であり,
X6は,置換を有してもよいアルキル鎖を側鎖に有するアミノ酸又はSであり,
X7は,任意のアミノ酸である,
ペプチド複合体。 - 請求項1に記載のペプチド複合体であって,
X1は,N-メチル化されてもよいA又はN-メチル化されてもよいFであり,
X2は,親水性アミノ酸,脂肪族・分岐鎖アミノ酸又は芳香族アミノ酸であり,
X3は,親水性アミノ酸,脂肪族アミノ酸又は芳香族アミノ酸であり,
X4は,N-メチル化されてもよい疎水性アミノ酸であり,
X5は,親水性アミノ酸,脂肪族・分岐鎖アミノ酸又はPであり,
X7は,親水性アミノ酸又は脂肪族アミノ酸である,
ペプチド複合体。 - 請求項1に記載のペプチド複合体であって,
X1は,N-メチル化されてもよいA又はN-メチル化されてもよいFであり,
X2は,V,T,E,Q,又はWであり,
X3は,A,R,Y,又はDであり,
X4は,メチル化されてもよいF又はメチル化されてもよいLであり,
X5は,D,E,S,P又はVであり,
X6は,(S)-2-アミノヘプタン酸(Ahp),R,L-ノルロイシン(Nle), (S)-2,7-ジアミノヘプタン酸(Hty),又はSであり,
X7は,S,A,L-α-アミノブタン酸(Abu),D,Q,又はVである,
ペプチド複合体。 - 請求項1に記載のペプチド複合体であって,
前記ペプチド複合体は,
第1のペプチドと,
第2のペプチドと,
第1のペプチド及び第2のペプチドをつなぐリンカーからなり,
第1のペプチド及び第2のペプチドの少なくとも一方は,前記ペプチドAである,ペプチド複合体。 - 請求項4に記載のペプチド複合体であって,
第1のペプチド及び第2のペプチドは,同一でも異なってもよく,前記ペプチドAである,ペプチド複合体。 - 請求項5に記載のペプチド複合体であって,
前記ペプチドAは,
MeF-T-A-V-S-MeF-D-E-D-Ahp-P-R-W-S-MeC(配列番号34)に記載のアミノ酸配列からなるペプチドであるか,又は配列番号34に記載のアミノ酸配列において1~3個のアミノ酸が,置換,欠失,付加又は挿入されたアミノ酸配列からなり,c-Metタンパク質と結合するペプチドである,ペプチド複合体。 - 請求項6に記載のペプチド複合体であって,前記ペプチドAは,環状ペプチドである,ペプチド複合体。
- 請求項7に記載のペプチド複合体であって,第1のペプチド及び第2のペプチドは,同一のペプチドAであり,第1のペプチド及び第2のペプチドのC末端が前記リンカーと結合した,ペプチド複合体。
- 請求項8に記載のペプチド複合体であって,前記ペプチドAは,配列番号2~配列番号34のいずれかに記載のアミノ酸配列からなるペプチドである,ペプチド複合体。
- 請求項9に記載のペプチド複合体であって,前記リンカーは,PEGリンカーである,ペプチド複合体。
- 請求項9に記載のペプチド複合体であって,前記リンカーは,配列番号35~41のいずれかに記載の配列を有するか,配列番号35~41のいずれかに記載の配列において1~3個のアミノ酸が,置換,欠失,付加又は挿入された配列からなるリンカーである,ペプチド複合体。
- 請求項11に記載のペプチド複合体を含む,c-Metタンパク質アゴニスト。
- 請求項5~12のいずれか1項に記載のペプチド複合体と薬学的に許容される担体とを含む,医薬組成物。
- 請求項13に記載の医薬組成物であって,
虚血性心疾患,急性肝炎,劇症肝炎,肝硬変,胆道閉鎖症,脂肪肝,急性腎不全,慢性腎不全,糖尿病性腎症,急性肺炎,肺線維症,血管障害,心筋梗塞,拡張型心筋症,皮膚潰瘍,脳梗塞,閉塞性動脈硬化症,胃潰瘍及び筋萎縮性側索硬化症からなる群より選択される疾患の治療又は予防に用いられる,医薬組成物。 - 請求項1~11のいずれか1項に記載のペプチド複合体を含む培養用培地添加物。
- 請求項15に記載の培養用培地添加物であって,ヒト由来の細胞又は組織を培養するために用いられる培養用培地添加物。
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP22775545.1A EP4317190A4 (en) | 2021-03-22 | 2022-03-22 | C-MET-PROTEIN-BINDING PEPTIDE COMPLEX |
| KR1020237036141A KR20230159872A (ko) | 2021-03-22 | 2022-03-22 | c-Met 단백질-결합 펩타이드 복합체 |
| US18/283,209 US20250326865A1 (en) | 2021-03-22 | 2022-03-22 | C-met protein-binding peptide complex |
| IL305967A IL305967A (en) | 2021-03-22 | 2022-03-22 | Peptide complex binds C-mat proteins |
| AU2022243260A AU2022243260A1 (en) | 2021-03-22 | 2022-03-22 | C-met protein-binding peptide complex |
| JP2023509171A JPWO2022202761A1 (ja) | 2021-03-22 | 2022-03-22 | |
| CA3213849A CA3213849A1 (en) | 2021-03-22 | 2022-03-22 | C-met protein-binding peptide complex |
| CN202280023381.8A CN117083304A (zh) | 2021-03-22 | 2022-03-22 | c-Met蛋白结合肽复合物 |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021047949 | 2021-03-22 | ||
| JP2021-047949 | 2021-03-22 |
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| WO2022202761A1 true WO2022202761A1 (ja) | 2022-09-29 |
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| PCT/JP2022/013001 Ceased WO2022202761A1 (ja) | 2021-03-22 | 2022-03-22 | c-Metタンパク質結合ペプチド複合体 |
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| Country | Link |
|---|---|
| US (1) | US20250326865A1 (ja) |
| EP (1) | EP4317190A4 (ja) |
| JP (1) | JPWO2022202761A1 (ja) |
| KR (1) | KR20230159872A (ja) |
| CN (1) | CN117083304A (ja) |
| AU (1) | AU2022243260A1 (ja) |
| CA (1) | CA3213849A1 (ja) |
| IL (1) | IL305967A (ja) |
| TW (2) | TW202305012A (ja) |
| WO (1) | WO2022202761A1 (ja) |
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2022
- 2022-03-21 TW TW111110401A patent/TW202305012A/zh unknown
- 2022-03-21 TW TW113143662A patent/TW202509086A/zh unknown
- 2022-03-22 IL IL305967A patent/IL305967A/en unknown
- 2022-03-22 CN CN202280023381.8A patent/CN117083304A/zh active Pending
- 2022-03-22 JP JP2023509171A patent/JPWO2022202761A1/ja active Pending
- 2022-03-22 AU AU2022243260A patent/AU2022243260A1/en active Pending
- 2022-03-22 US US18/283,209 patent/US20250326865A1/en active Pending
- 2022-03-22 CA CA3213849A patent/CA3213849A1/en active Pending
- 2022-03-22 KR KR1020237036141A patent/KR20230159872A/ko active Pending
- 2022-03-22 WO PCT/JP2022/013001 patent/WO2022202761A1/ja not_active Ceased
- 2022-03-22 EP EP22775545.1A patent/EP4317190A4/en active Pending
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Also Published As
| Publication number | Publication date |
|---|---|
| TW202305012A (zh) | 2023-02-01 |
| IL305967A (en) | 2023-11-01 |
| JPWO2022202761A1 (ja) | 2022-09-29 |
| EP4317190A1 (en) | 2024-02-07 |
| CN117083304A (zh) | 2023-11-17 |
| CA3213849A1 (en) | 2022-09-29 |
| EP4317190A4 (en) | 2025-01-29 |
| US20250326865A1 (en) | 2025-10-23 |
| AU2022243260A1 (en) | 2023-09-28 |
| KR20230159872A (ko) | 2023-11-22 |
| TW202509086A (zh) | 2025-03-01 |
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