WO2016204212A1 - ポリスルフィド化合物の臭いの抑制剤 - Google Patents
ポリスルフィド化合物の臭いの抑制剤 Download PDFInfo
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- WO2016204212A1 WO2016204212A1 PCT/JP2016/067895 JP2016067895W WO2016204212A1 WO 2016204212 A1 WO2016204212 A1 WO 2016204212A1 JP 2016067895 W JP2016067895 W JP 2016067895W WO 2016204212 A1 WO2016204212 A1 WO 2016204212A1
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/06—Ethers; Acetals; Ketals; Ortho-esters
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L9/00—Disinfection, sterilisation or deodorisation of air
- A61L9/01—Deodorant compositions
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/01—Hydrocarbons
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/07—Aldehydes; Ketones
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/10—Esters; Ether-esters
- C08K5/101—Esters; Ether-esters of monocarboxylic acids
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
- A61K31/47—Quinolines; Isoquinolines
- A61K31/473—Quinolines; Isoquinolines ortho- or peri-condensed with carbocyclic ring systems, e.g. acridines, phenanthridines
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/02—Odour removal or prevention of malodour
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/007—Fragrance additive
Definitions
- the present invention relates to an odor inhibitor for polysulfide compounds.
- Volatile sulfur compounds generated from wastes such as drain outlets and garbage are malodorous components that make people uncomfortable even at low concentrations. These volatile sulfur compounds are produced by degradation of sulfur-containing amino acids such as cysteine and methionine contained in sewage and wastes or proteins containing them by the action of metabolic enzymes such as methionine lyase and cysteine lyase in bacteria. appear.
- methyl mercaptan is produced from methionine by the action of methionine lyase
- hydrogen sulfide is produced from cysteine by the action of cysteine lyase.
- polysulfide compounds such as dimethyl disulfide and dimethyl trisulfide are generated enzymatically or oxidatively from methyl mercaptan and hydrogen sulfide, which also cause bad odor.
- Patent Document 1 discloses that a fragrance component is added as a deodorant or fragrance to a composition for cleaning, sterilizing, antifouling, and deodorizing a drain outlet or the like.
- Patent Document 2 the action of an enzyme that generates methyl mercaptan from methionine or an enzyme that generates hydrogen sulfide from cysteine is inhibited by a specific fragrance component and is caused by a volatile sulfur compound generated from a waste or a drain outlet. It is disclosed to suppress malodors.
- the organic sulfide oxide is selected from monoesters, diesters, and / or triesters, alcohols, aldehydes, ketones, and terpenes in order to prevent odors of organic sulfide oxides (such as DMSO).
- organic sulfide oxides such as DMSO.
- the addition of an odor masking agent comprising at least one compound is described.
- the smell is bound to the olfactory receptor on the olfactory nerve cell located in the olfactory epithelium in the upper nasal cavity, and the response of the receptor is transmitted to the central nervous system. It is recognized by. In the case of humans, it is reported that there are about 400 olfactory receptors, and the genes encoding them are about 2% of all human genes. In general, olfactory receptors and odor molecules are associated with each other in a plurality of combinations. That is, each olfactory receptor receives a plurality of odor molecules with similar structures with different affinities, while each odorant receptor is received by a plurality of olfactory receptors. Furthermore, it has been reported that an odor molecule that activates one olfactory receptor acts as an antagonist that inhibits activation of another olfactory receptor. The combination of these multiple olfactory receptor responses has led to the recognition of individual odors.
- Patent Documents 4 to 5 disclose searching for substances that suppress malodor such as hexanoic acid and skatole, using as an index the activity of olfactory receptors that specifically respond to those malodorous substances.
- Patent Document 6 discloses searching for a substance that suppresses sweat odor by using the activity of an olfactory receptor responding to a specific carboxylic acid as an index.
- Patent Document 7 discloses a method for identifying a drug that regulates the function of a polypeptide by measuring the activity of the polypeptide encoding an olfactory receptor in the presence of isovaleric acid or its equivalent.
- Patent Document 8 discloses a method of screening a library of chemical substances for compounds related to olfactory sense by identifying a compound that specifically binds to a polypeptide encoding an olfactory receptor.
- Patent Document 1 JP-A-2006-206882 (Patent Document 2) JP-A-2010-004971 (Patent Document 3) JP-A-5575241 (Patent Document 4) JP-A-2012-050411 (Patent Document 5) ) JP 2012-249614 A (Patent Literature 6) US Patent Publication No. 2013/0336910 (Patent Literature 7) International Publication No. 2006/094704 (Patent Literature 8) Japanese Patent Publication No. 2004-504010
- the present invention provides at least one selected from the group consisting of butyl 2-methylbutanoate, ⁇ -terpinene, dipentene, cis-4-heptenal, 1,4-cineole, trimethylhexyl aldehyde, and (+)-limonene oxide.
- An inhibitor of a odor of a polysulfide compound comprising one kind as an active ingredient wherein the polysulfide compound is represented by the following formula (I): R 1- [S] n -R 2 (I) (In the formula, R 1 and R 2 are the same or different and each represents a linear or branched alkyl or alkenyl group having 1 to 6 carbon atoms, and n represents an integer of 2 to 5)
- A Response to dimethyl disulfide
- B Response to dimethyl trisulfide
- Wastes such as drain outlets and garbage generate various volatile sulfur compounds due to bacterial decay and cause bad odor.
- One of the main causative substances of the malodor is polysulfide compounds such as dimethyl disulfide and dimethyl trisulfide. Therefore, control of the odor of these polysulfide compounds is required.
- the present inventor has found that a substance that suppresses the response of the olfactory receptor OR4S2 that specifically responds to the polysulfide compound can suppress the odor of the polysulfide compound by olfactory receptor antagonism.
- the odor of polysulfide compounds such as dimethyl disulfide and dimethyl trisulfide can be selectively deodorized by olfactory receptor antagonism.
- “inhibition of odor by olfactory receptor antagonism” means that by applying both the target odor molecule and another molecule, the other molecule inhibits the receptor response to the target odor molecule. As a result, it is a means for suppressing the odor recognized by the individual. Suppression of odor by olfactory receptor antagonism is distinguished from means for concealing the target odor by the fragrance of a fragrance, such as deodorization by a fragrance, even if the means uses other molecules.
- An example of odor suppression by olfactory receptor antagonism is the case of using a substance that inhibits the response of olfactory receptors such as an antagonist (antagonist). If a substance that inhibits the response is applied to the receptor of the odor molecule that brings about a specific odor, the response of the receptor to the odor molecule is suppressed, so the odor finally perceived by the individual is suppressed. Can do.
- olfactory receptor polypeptide refers to an olfactory receptor or a polypeptide having a function equivalent thereto, and a polypeptide having a function equivalent to an olfactory receptor is similar to an olfactory receptor.
- a function that increases the amount of intracellular cAMP by activating adenylate cyclase in combination with intracellular G ⁇ s, which can be expressed on the cell membrane and activated by binding of odor molecules (Nat. Neurosci., 2004, 5: 263-278).
- nucleotide sequence and amino acid sequence identity is calculated by the Lippman-Pearson method (Lipman-Pearson method; Science, 1985, 227: 1435-41). Specifically, using the homology analysis (Search homology) program of genetic information software Genetyx-Win (Ver. 5.1.1; software development), perform analysis with unit size to compare (ktup) as 2. Is calculated by
- “at least 80% identity” with respect to nucleotide and amino acid sequences refers to 80% or more, preferably 85% or more, more preferably 90% or more, even more preferably 95% or more, and even more preferably It means 98% or more, preferably 99% or more identity.
- polysulfide compound for which the odor is suppressed by the present invention is a compound represented by the following formula (I).
- the “polysulfide compound” of interest is sometimes referred to as “polysulfide compound of formula (I)” or simply “compound of formula (I)”.
- R 1 and R 2 are the same or different and each represents a linear or branched alkyl or alkenyl group having 1 to 6 carbon atoms.
- Examples of the linear or branched alkyl group having 1 to 6 carbon atoms include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, pentyl, isopentyl, tert-pentyl, and Hexyl is mentioned.
- Examples of the straight-chain or branched alkenyl group having 1 to 6 carbon atoms include vinyl, propenyl, allyl, butenyl, and methylbutenyl.
- R 1 and R 2 are the same or different and each represents a linear or branched alkyl or alkenyl group having 1 to 4 carbon atoms, and the linear or branched chain having 1 to 4 carbon atoms
- alkyl or alkenyl groups include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, vinyl, propenyl, allyl, and butenyl.
- R 1 and R 2 are the same or different and are methyl, ethyl, propyl or isopropyl, and more preferably R 1 and R 2 are methyl.
- n represents an integer of 2 to 5, preferably 2 or 3.
- the polysulfide compound of the formula (I) is a volatile substance having a structure represented by the formula (I). More preferred examples of the polysulfide compound of the formula (I) include dimethyl disulfide (DMDS) and dimethyl trisulfide (DMTS).
- DMDS dimethyl disulfide
- DMTS dimethyl trisulfide
- the “odor of the polysulfide compound” suppressed by the present invention is an odor produced by the polysulfide compound of the formula (I) described above, and preferably an odor produced by DMDS or DMTS.
- the “odor of a polysulfide compound” suppressed by the present invention may be a malodor emitted from spoiled garbage, sewage, or a drain.
- the polysulfide compound of the formula (I) was recognized mainly by OR4S2 (GI: 116517324: SEQ ID NO: 1) in the olfactory receptor. Therefore, it was considered that a substance that suppresses the response of the olfactory receptor OR4S2 can selectively suppress the odor of the polysulfide compound of the formula (I) based on the olfactory receptor antagonism.
- the present inventors searched for an antagonist substance that suppresses the response of OR4S2 to the compound of formula (I). As a result, it was found that the searched substance actually has an action of suppressing the odor of the polysulfide compound of formula (I) and can be used for the suppression of the odor of the polysulfide compound of formula (I). .
- an OR4S2 antagonist that suppresses the response of the olfactory receptor OR4S2 can be used for suppressing the odor of the polysulfide compound of formula (I).
- An OR4S antagonist suppresses the response of OR4S2 to a polysulfide compound of formula (I) by olfactory receptor antagonism, thereby causing a change in odor recognition by an individual compound of formula (I), resulting in the expression of the formula (I) The odor of the compound can be suppressed.
- OR4S2 antagonists examples include compounds described in Table A below.
- an olfactory receptor polypeptide having a function equivalent to that of OR4S2 comprises an amino acid sequence having at least 80% identity with the amino acid sequence represented by SEQ ID NO: 1, and a polysulfide of formula (I) It refers to olfactory receptor polypeptides having responsiveness to compounds, preferably DMDS and DMTS.
- the compounds described in Table A have been known as fragrance materials, but have not been known to have a function as an OR4S2 antagonist or a function of selectively suppressing the odor of the compound of formula (I).
- any of the compounds listed in Table A can be purchased commercially. For example, it can be obtained from Sigma-Aldrich, Tokyo Kasei Kogyo, etc.
- the present invention provides an odor suppressor for a polysulfide compound of formula (I) comprising an OR4S2 antagonist as an active ingredient.
- the odor inhibitor of the polysulfide compound of the present invention is a substance that can act as an antagonist of OR4S2.
- the OR4S2 antagonist be applied as an active ingredient for the suppression of the odor of the polysulfide compound of formula (I) to any substance for which the suppression of the odor of the compound of formula (I) is desired? Or in any environment where suppression of the odor of the compound of formula (I) is desired.
- the OR4S2 antagonist may be added to a substance containing or possibly containing the compound of formula (I) as an active ingredient for the suppression of the odor of the polysulfide compound of formula (I).
- the OR4S2 antagonist can be used for the preparation of a odor inhibitor of the polysulfide compound of formula (I).
- the odor inhibitor of the compound of formula (I) is a composition, and the OR4S2 antagonist is contained in the composition as an active ingredient for suppressing the odor of the compound of formula (I).
- the odor suppressor of the compound of formula (I) may consist essentially of the OR4S2 antagonist.
- the OR4S2 antagonist used in the present invention is at least one selected from the group consisting of the compounds described in Table A.
- the OR4S2 antagonist used in the present invention is any one of the compounds listed in Table A, or any combination of two or more.
- the odor suppressor of the polysulfide compound of formula (I) provided by the present invention is generally added to other deodorant component, deodorant component or fragrance component, or deodorant or deodorant together with the OR4S2 antagonist.
- Any component may be appropriately contained depending on the purpose. Examples of such other components include a fragrance component that can be contained in a composition for cleaning, sterilizing, antifouling, and deodorizing a drain outlet described in Patent Document 1, and a waste described in Patent Document 2.
- Perfume that can be included in the malodor generation inhibitor for water use or drain outlet, but is not limited thereto.
- the present invention provides a method for suppressing the odor of a polysulfide compound of formula (I) comprising the step of coexisting a polysulfide compound of formula (I) and an OR4S2 antagonist.
- the coexisting step in the method of the present invention comprises an individual, preferably an olfactory receptor, in the presence of the polysulfide compound of formula (I), which needs to suppress the odor of the compound of formula (I).
- the applied antagonist acts on the OR4S2 of the individual and suppresses the response of the OR4S2 to the compound of formula (I).
- the odor of the compound of formula (I) is suppressed by olfactory receptor antagonism.
- the coexisting step in the method of the invention comprises an individual in need of inhibition of the odor of the polysulfide compound of formula (I), preferably the odor of the compound of formula (I) by olfactory receptor antagonism
- Application of the OR4S2 antagonist to an individual in need of inhibition and exposing the individual to which the OR4S2 antagonist has been applied to the compound of formula (I).
- the pre-applied antagonist acts on the individual's OR4S2 and suppresses the response of the OR4S2 to the later exposed compound of formula (I).
- the odor of the compound of formula (I) is suppressed by olfactory receptor antagonism.
- the OR4S2 antagonist is carried by an individual in need of suppression of the odor of the polysulfide compound of formula (I). This applies the OR4S2 antagonist to the individual. Even when an individual to which the OR4S2 antagonist is applied is exposed to the compound of formula (I), OR4S2 shows a low response to the polysulfide compound, and as a result, the odor of the compound of formula (I) is suppressed.
- the OR4S2 antagonist is placed in an environment where a polysulfide compound of formula (I) is present or possible.
- the OR4S2 antagonist is applied to individuals who need to suppress the odor of the polysulfide compound of formula (I) in the environment.
- OR4S2 shows a low response to the polysulfide compound, and as a result, the odor of the compound of formula (I) is suppressed.
- the OR4S2 antagonist is added to a substance that contains or may contain a polysulfide compound of formula (I).
- a composition of a substance containing or possibly containing the polysulfide compound of formula (I) and the OR4S2 antagonist is prepared, the composition suppressing the odor of the compound of formula (I) Applies to individuals who need it. Even when the composition emits the odor of the compound of formula (I), the OR4S2 antagonist suppresses the response of OR4S2, and as a result, the odor of the compound of formula (I) is suppressed.
- the OR4S2 antagonist applied to the method of the present invention is at least one selected from the group consisting of the compounds described in Table A.
- a composition containing, as an active ingredient, at least one selected from the group consisting of the compounds described in Table A described above is applied as the OR4S2 antagonist.
- the subject is not particularly limited as long as it is a mammal, but is preferably a human.
- a person who handles garbage at home or workplace a person who engages in cleaning or collecting work of garbage , Persons engaged in inspection, cleaning or construction of drainage pipes and sewage treatment facilities.
- a polysulfide compound odor inhibitor comprising an olfactory receptor OR4S2 antagonist as an active ingredient.
- a method for suppressing the odor of a polysulfide compound comprising applying an olfactory receptor OR4S2 antagonist to an individual who needs to suppress the odor of a polysulfide compound.
- the polysulfide compound is represented by the following formula (I): R 1- [S] n -R 2 (I) (In the formula, R 1 and R 2 are the same or different and each represents a linear or branched alkyl or alkenyl group having 1 to 6 carbon atoms, and n represents an integer of 2 to 5) It is a compound represented by these.
- R 1 and R 2 are Preferably, they are the same or different and each represents a linear or branched alkyl or alkenyl group having 1 to 4 carbon atoms, More preferably, it is the same or different and represents methyl, ethyl, propyl or isopropyl, More preferably, R 1 and R 2 represent methyl.
- n is preferably 2 or 3.
- the polysulfide compound is dimethyl disulfide or dimethyl trisulfide.
- the odor of the polysulfide compound is a malodor generated from spoiled garbage, sewage, or a drain.
- the OR4S2 antagonist is butyl 2-methylbutanoate, ⁇ -terpinene, dipentene, cis-4-heptenal, 1,4-cineole, It is at least one selected from the group consisting of trimethylhexyl aldehyde and (+)-limonene oxide.
- At least one selected from the group consisting of butyl 2-methylbutanoate, ⁇ -terpinene, dipentene, cis-4-heptenal, 1,4-cineole, trimethylhexylaldehyde and (+)-limonene oxide An antagonist to an olfactory receptor polypeptide having a function equivalent to OR4S2.
- OR4S2 is an olfactory receptor polypeptide consisting of the amino acid sequence represented by SEQ ID NO: 1, and preferably the olfactory receptor polypeptide having a function equivalent to OR4S2 is the amino acid sequence represented by SEQ ID NO: 1
- R 1 and R 2 are Preferably, they are the same or different and each represents a linear or branched alkyl or alkenyl group having 1 to 4 carbon atoms, More preferably, it is the same or different and represents methyl, ethyl, propyl or isopropyl, More preferably, R 1 and R 2 represent methyl.
- n is preferably 2 or 3.
- the polysulfide compound is dimethyl disulfide or dimethyl trisulfide.
- Example 1 Identification of Olfactory Receptor Responsive to Polysulfide Compound (1) Cloning of Human Olfactory Receptor Gene Human olfactory receptor is a human genomic DNA female (G1521: Promega) based on sequence information registered in GenBank. Cloning was performed by PCR using a template. Each gene amplified by the PCR method is incorporated into a pENTR vector (Invitrogen) according to the manual, and NotI and AscI prepared downstream of the Flag-Rho tag sequence on the pME18S vector using the NotI and AscI sites present on the pENTR vector. Recomposed to the site.
- pENTR vector Invitrogen
- RTP1S-human RTP1S vector A vector expressing a protein receptor-transporting protein (RTP) that promotes cell membrane expression of an olfactory receptor polypeptide was prepared. Specifically, a gene encoding human RTP1S (GI: 50234917) was incorporated into the EcoRI and XhoI sites of the pME18S vector.
- RTP protein receptor-transporting protein
- HEK293 cells expressing any one of human olfactory receptors were prepared.
- a reaction solution having the composition shown in Table 2 was prepared and allowed to stand in a clean bench for 15 minutes, and then added to each well of a 96-well plate (BD).
- HEK293 cells (3 ⁇ 10 5 cells / cm 2 ) were seeded in 90 ⁇ L each well, and cultured for 24 hours in an incubator maintained at 37 ° C. and 5% CO 2 .
- cells (Mock) under conditions that do not express olfactory receptors were also prepared and used in the experiment.
- Luciferase assay The olfactory receptor expressed in HEK293 cells is coupled with intracellular G ⁇ s to activate adenylate cyclase, thereby increasing the amount of intracellular cAMP.
- a luciferase reporter gene assay was used to monitor the increase in intracellular cAMP level as a luminescence value derived from the firefly luciferase gene (fluc2P-CRE-hygro).
- a renilla luciferase gene fused with the CMV promoter downstream was simultaneously introduced, and used as an internal standard for correcting errors in gene transfer efficiency and cell number.
- the medium was removed from the culture prepared in (3) above, and 75 ⁇ L of a solution containing a polysulfide compound prepared in DMEM (Nacalai) was added.
- the polysulfide compound was dimethyl disulfide (DMDS) or dimethyl trisulfide (DMTS) 100 ⁇ M.
- the cells were cultured for 3 hours in a CO 2 incubator to fully express the luciferase gene in the cells.
- the luciferase activity was measured using a Dual-Glo TM luciferase assay system (Promega) according to the operation manual of the product.
- a value fLuc / hRluc obtained by dividing the luminescence value derived from firefly luciferase by the luminescence value derived from Renilla luciferase was calculated.
- a value obtained by dividing fLuc / hRluc derived from firefly luciferase induced by polysulfide compound stimulation by fLuc / hRluc in cells not stimulated with polysulfide compound was calculated as a fold increase and used as an index of response intensity.
- OR4S2 exhibits a specific response to both DMDS and DMTS (FIG. 1). ).
- the response of OR4S2 to DMDS and DMTS was concentration dependent (FIG. 2).
- OR4S2 did not respond to 3 mM methyl mercaptan, which is also a volatile sulfur compound (FIG. 3). Therefore, OR4S2 is a polysulfide compound receptor having responsiveness to polysulfide compounds.
- OR4S2 is a novel polysulfide compound receptor that has not been found to respond to polysulfide compounds.
- Example 2 Search for OR4S2 Antagonist HEK293 cells in which OR4S2 (SEQ ID NO: 1) was expressed were prepared by the same procedure as in Examples 1 (1) to (3). According to the procedure of Example 1 (4), the response (fLuc / hRluc value) of the olfactory receptor to DMDS in the presence and absence of the test substance was measured by luciferase reporter gene assay.
- fLuc / hRluc value (X ′) for DMTS single stimulation divided by fLuc / hRluc value (Y) of cells not subjected to DMTS stimulation (X ′ / Y) is DMTS response value (Fold). (increase).
- the fLuc / hRluc value (Z ′) induced by co-stimulation of DMTS and the test substance was similarly compared with the fLuc / hRluc value (Y ) To calculate (Z ′ / Y) and set it as “Fold increment”.
- the addition concentration of DMTS to the culture was 300 ⁇ M, and the addition concentration of the test substance was 100 ⁇ M.
- Trimethylhexyl aldehyde (THA), cis-4-heptenal, 1,4-cineole, (+)-limonene oxide, ⁇ -terpinene, butyl 2-methylbutanoate, and dipentene are all DMDS responses of OR4S2 in a concentration-dependent manner
- Trimethylhexylaldehyde (THA), cis-4-heptenal, 1,4-cineol, (+)-limonene oxide, ⁇ -terpinene, and butyl 2-methylbutanoate all suppressed the DMTS response of OR4S2.
- Example 3 Suppressing Odor of Polysulfide Compound by OR4S2 Antagonist Suppression of Odor of Polysulfide Compound by Trimethylhexylaldehyde, (THA), cis-4-heptenal, and 1,4-cineole, which are OR4S2 Antagonists Identified in Example 2 The effect was confirmed by a sensory test.
- DMDS For DMDS, THA, cis-4-heptenal, or 1,4-cineole, a 0.1% (v / v) solution of mineral oil was prepared.
- DMTS a 0.01% (v / v) solution of mineral oil was prepared. Place two cotton balls in a 20 mL glass bottle (Marem, No. 6), one cotton ball with 30 ⁇ L of DMDS or DMTS solution, and the other cotton ball with a solution of any of the three OR4S2 antagonists. 30 ⁇ L was impregnated. The glass bottle containing the cotton ball was covered and allowed to stand at 37 ° C. for 1 hour, and then used as a test sample for a sensory test. A glass bottle containing only a cotton ball containing a solution of DMDS or DMTS as a reference sample and a glass bottle containing only a cotton ball containing mineral oil (Vehicle) as a target sample were prepared.
- the sensory test was performed in a single blind manner by 10 evaluators for DMDS and 11 evaluators for DMTS. The test was started from 14:00 after 1 and a half hours had passed since the meal. In order to prevent the spread of odors, the test was basically performed near the draft. In order to eliminate the effect of adaptation to the odor of the polysulfide compound, the perceived intensity of DMDS or DMTS odor was appropriately checked during the test, and a break was taken if necessary. The evaluators were divided into two groups, one group in the order THA, cis-4-heptenal, then 1,4-cineole, the other group 1,4-cineole, cis-4-heptenal, then THA.
- the DMDS or DMTS odor suppression effect was evaluated.
- the test sample was replaced with a new one after evaluation by three evaluators.
- each evaluator has the following five levels of criteria: “DMDS (or DMTS) odor is 1: unknown, 2: perceptible, 3: easy to understand, 4: feel strong, 5: endurable “I feel so strong” that the DMDS (or DMTS) odor intensity of DMDS (or DMTS) alone is 3, and the DMDS (or DMTS) odor intensity of each test sample in increments of 1.0 to 0.5.
- the evaluation was made in nine stages up to zero. The average value of the evaluation results by each evaluator was obtained.
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Abstract
Description
(特許文献2)特開2010-004971号公報
(特許文献3)特許第5575241号公報
(特許文献4)特開2012-050411号公報
(特許文献5)特開2012-249614号公報
(特許文献6)米国特許公開第2013/0336910号
(特許文献7)国際公開公報第2006/094704号
(特許文献8)特表2004-504010号公報
R1-[S]n-R2 (I)
(式中、R1とR2は、同一又は異なって、炭素数1~6の直鎖又は分枝鎖のアルキル又はアルケニル基を示し、nは2~5の整数を示す)
で表される、ポリスルフィド化合物の臭いの抑制剤を提供する。
2-メチルブタン酸ブチル(2-Methyl butyl n-butyrate、又はButyl 2-methylbutanoate)
α-テルピネン(alpha-Terpinene、又はp-Mentha-1,3-diene)
ジペンテン(Dipentene)
cis-4-ヘプテナール(Cis-4-Heptenal、又は(Z)-Hept-4-enal)
1,4-シネオール(1,4-Cineole)
トリメチルヘキシルアルデヒド(Trimethylhexyl aldehyde、又は3,5,5-Trimethylhexanal)
(+)-リモネンオキシド((+)-Limonene oxide)
R1-[S]n-R2 (I)
(式中、R1とR2は、同一又は異なって、炭素数1~6の直鎖又は分枝鎖のアルキル又はアルケニル基を示し、nは2~5の整数を示す)
で表される化合物である。
好ましくは、同一又は異なって、炭素数1~4の直鎖又は分枝鎖のアルキル又はアルケニル基を示し、
より好ましくは、同一又は異なって、メチル、エチル、プロピル又はイソプロピルを示し、
さらに好ましくは、R1とR2はメチルを示す。
好ましくは、OR4S2が、配列番号1で示されるアミノ酸配列からなる嗅覚受容体ポリペプチドであり、かつ
好ましくは、OR4S2と同等な機能を有する嗅覚受容体ポリペプチドが、配列番号1で示されるアミノ酸配列と少なくとも80%の同一性を有するアミノ酸配列からなり、かつ下記式(I)で表されるポリスルフィド化合物に対する応答性を有する嗅覚受容体ポリペプチドである、
R1-[S]n-R2 (I)
(式中、R1とR2は、同一又は異なって、炭素数1~6の直鎖又は分枝鎖のアルキル又はアルケニル基を示し、nは2~5の整数を示す)。
好ましくは、同一又は異なって、炭素数1~4の直鎖又は分枝鎖のアルキル又はアルケニル基を示し、
より好ましくは、同一又は異なって、メチル、エチル、プロピル又はイソプロピルを示し、
さらに好ましくは、R1とR2はメチルを示す。
(1)ヒト嗅覚受容体遺伝子のクローニング
ヒト嗅覚受容体はGenBankに登録されている配列情報を基に、human genomic DNA female(G1521:Promega)を鋳型としたPCR法によりクローニングした。PCR法により増幅した各遺伝子をpENTRベクター(Invitrogen)にマニュアルに従って組み込み、pENTRベクター上に存在するNotI、AscIサイトを利用して、pME18Sベクター上のFlag-Rhoタグ配列の下流に作製したNotI、AscIサイトへと組換えた。
嗅覚受容体ポリペプチドの細胞膜発現を促進するタンパク質receptor-transporting protein(RTP)を発現するベクターを調製した。具体的には、ヒトRTP1S(GI:50234917)をコードする遺伝子を、pME18SベクターのEcoRI、XhoIサイトへ組み込んだ。
ヒト嗅覚受容体のいずれか1種を発現させたHEK293細胞を作製した。表2に示す組成の反応液を調製しクリーンベンチ内で15分静置した後、96ウェルプレート(BD)の各ウェルに添加した。次いで、HEK293細胞(3×105細胞/cm2)を90μLずつ各ウェルに播種し、37℃、5%CO2を保持したインキュベータ内で24時間培養した。対照として用いるために、嗅覚受容体を発現させない条件の細胞(Mock)も用意し、同様に実験に用いた。
HEK293細胞に発現させた嗅覚受容体は、細胞内在性のGαsと共役しアデニル酸シクラーゼを活性化することで、細胞内cAMP量を増加させる。本研究での匂い応答測定には、細胞内cAMP量の増加をホタルルシフェラーゼ遺伝子(fluc2P-CRE-hygro)由来の発光値としてモニターするルシフェラーゼレポータージーンアッセイを用いた。また、CMVプロモータ下流にウミシイタケルシフェラーゼ遺伝子を融合させたもの(hRluc-CMV)を同時に遺伝子導入し、遺伝子導入効率や細胞数の誤差を補正する内部標準として用いた。
428種類の嗅覚受容体についてDMDS又はDMTSに対する応答を測定した結果、嗅覚受容体OR4S2が、DMDS及びDMTSの両方に対して特異的な応答を示すことが明らかになった(図1)。OR4S2のDMDS及びDMTSに対する応答は濃度依存的であった(図2)。一方で、OR4S2は、同じく揮発性硫黄化合物であるメチルメルカプタン3mMに対しては応答しなかった(図3)。したがって、OR4S2は、ポリスルフィド化合物に対して応答性をもつポリスルフィド化合物受容体である。またOR4S2は、これまでポリスルフィド化合物に応答することが見出されていない、新規のポリスルフィド化合物受容体である。
実施例1(1)~(3)と同様の手順で、OR4S2(配列番号1)を発現させたHEK293細胞を作製した。実施例1(4)の手順に従って、ルシフェラーゼレポータージーンアッセイにより、試験物質存在下及び非存在下での嗅覚受容体のDMDSに対する応答(fLuc/hRluc値)を測定した。DMDS単独刺激により誘導されたfLuc/hRluc値(X)、DMDS刺激を行わなかった細胞でのfLuc/hRluc値(Y)、DMDSと試験物質との共刺激により誘導されたfLuc/hRluc値(Z)を求め、以下の計算式により、試験物質存在下での受容体のDMDS応答強度(Response(%))を求めた。
Response(%)=(Z-Y)/(X-Y)×100
独立した実験を3回行い、各回の実験の平均値を求めた。培養物へのDMDSの添加濃度は1mMとし、試験物質の添加濃度は0~3000μMの範囲で変更した。
実施例2で同定したOR4S2アンタゴニストであるトリメチルヘキシルアルデヒド、(THA)、cis-4-ヘプテナール、及び1,4-シネオールによるポリスルフィド化合物の臭いの抑制効果を、官能試験により確認した。
試験サンプルの臭い評価では、各評価者に、次の5段階の基準「DMDS(又はDMTS)の臭いが、1:わからない、2:感知できる、3:楽にわかる、4:強く感じる、5:耐えられないほど強く感じる」を設定し、DMDS(又はDMTS)単独での臭い強度を3としたときの各試験サンプルのDMDS(又はDMTS)臭の強度を1.0から0.5刻みで5.0までの9段階で評価させた。各評価者による評価結果の平均値を求めた。
Claims (3)
- 前記R1とR2が、同一又は異なって、炭素数1~4の直鎖又は分枝鎖のアルキル又はアルケニル基であり、nは2又は3である、請求項1記載のポリスルフィド化合物の臭いの抑制剤。
- 前記ポリスルフィド化合物がジメチルジスルフィド又はジメチルトリスルフィドである、請求項1又は2記載のスルフィド化合物の臭いの抑制剤。
Priority Applications (4)
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| BR112017027361-6A BR112017027361A2 (ja) | 2015-06-17 | 2016-06-16 | The stinking thing depressant of a polysulfide compound |
| US15/737,210 US10619027B2 (en) | 2015-06-17 | 2016-06-16 | Agent for suppressing odors of polysulfide compounds |
| EP16811686.1A EP3311807B1 (en) | 2015-06-17 | 2016-06-16 | Agent for suppressing odors of polysulfide compounds |
| CN201680034708.6A CN108271352B (zh) | 2015-06-17 | 2016-06-16 | 多硫化物的臭味的抑制剂 |
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| JP2015121917 | 2015-06-17 | ||
| JP2015-121917 | 2015-06-17 | ||
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| JP2016116226A JP6371336B2 (ja) | 2015-06-17 | 2016-06-10 | ポリスルフィド化合物の臭いの抑制剤 |
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| EP3311807B1 (en) | 2022-03-09 |
| EP3311807A1 (en) | 2018-04-25 |
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