Classifications

• • C—CHEMISTRY; METALLURGY
  • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
  • C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
  • C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
  • C12Q1/68—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving nucleic acids
  • C12Q1/6844—Nucleic acid amplification reactions
  • C12Q1/686—Polymerase chain reaction [PCR]
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
  • C08F130/00—Homopolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing phosphorus, selenium, tellurium or a metal
  • C08F130/02—Homopolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing phosphorus, selenium, tellurium or a metal containing phosphorus
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
  • C08F230/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing phosphorus, selenium, tellurium or a metal
  • C08F230/02—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing phosphorus, selenium, tellurium or a metal containing phosphorus
• • C—CHEMISTRY; METALLURGY
  • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
  • C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
  • C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
  • C12Q1/68—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving nucleic acids
  • C12Q1/6844—Nucleic acid amplification reactions
  • C12Q1/6851—Quantitative amplification
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07K—PEPTIDES
  • C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
  • C07K14/005—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from viruses
• • C—CHEMISTRY; METALLURGY
  • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
  • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
  • C12N2770/00—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA ssRNA viruses positive-sense
  • C12N2770/00011—Details
  • C12N2770/20011—Coronaviridae
  • C12N2770/20022—New viral proteins or individual genes, new structural or functional aspects of known viral proteins or genes

Definitions

• the present invention relates to compositions for nucleic acid amplification.
• the nucleic acid amplification method is a method of amplifying a target gene, and is a technology used in research in the field of molecular biology, clinical diagnostics, and forensics.
• a PCR (Polymerase Chain Reaction) method is known as a nucleic acid amplification method for amplifying a target gene. Since the PCR method can detect nucleic acids with high sensitivity, it is used for diagnosing infectious diseases, detecting viruses, and the like.
• Non-Patent Document 1 a two-step RT-PCR method that specifically detects two gene regions of the new coronavirus (2019-nCoV), open reading flame 1a (ORF1a) and spike (S), or TaqMan probe
• the novel coronavirus (2019-nCoV) is identified by genetic testing using a real-time one-step RT-PCR method.
• Bovine serum albumin BSA
• gelatin gelatin
• nonionic surfactants are known as stabilizers that improve the stability of the composition.
• the object of the present invention is to improve the storage stability of compositions used in nucleic acid amplification methods (eg, PCR method).
• the RNA virus-derived RNA is SARS-CoV-2-derived RNA.
• a primer is an oligonucleotide having a length of 10 to 40 bases.
• concentration of the primer is 0.01 to 10 ⁇ M.
• nucleic acid amplification methods including.
• nucleic acid amplification method according to [13] above, which is a real-time RT-PCR method using a 1-step RT-real-time PCR reagent.
• nucleic acid is RNA virus-derived RNA.
• composition for nucleic acid amplification with excellent storage stability can be obtained.
• composition for nucleic acid amplification provides a composition for nucleic acid amplification (hereinafter referred to as "the present (sometimes described as “the composition of the invention”).
• the polymer of the present invention may be used alone or in combination of two or more.
• “2-(meth)acryloyloxyethylphosphorylcholine” is sometimes referred to as “monomer (1)”
• “structural unit derived from monomer (1)” is referred to as “structural unit (1 )” may be described.
• 2-(meth)acryloyloxyethylphosphorylcholine basically means “2-acryloyloxyethylphosphorylcholine or 2-methacryloyloxyethylphosphorylcholine.
• 2-(meth)acryloyloxyethylphosphorylcholine means "2-acryloyloxyethylphosphorylcholine and/or 2-methacryloyloxyethylphosphorylcholine.
• structural unit derived from 2-(meth)acryloyloxyethylphosphorylcholine refers to a carbon-carbon double bond of a (meth)acryloyl group contained in 2-(meth)acryloyloxyethylphosphorylcholine. means a structural unit having a structure formed by Structural units derived from other monomers have the same meaning as above.
• a composition for nucleic acid amplification means a composition used for a nucleic acid amplification method.
• Nucleic acid amplification methods are not particularly limited, but for example, Polymerase Chain Reaction (PCR) method, Loop mediated isothermal Amplification (LAMP) method, Transcription Mediated Amplification (TMA) method, Isothermal and Chimeric primer-initiated Amplification of Nucleic acids (IICAN) method, Strand Displacement Amplification (SDA) method, Ligase Chain Reaction (LCR) method, Nucleic Acid Sequence-Based Amplification (NASBA) method, and the like.
• the nucleic acid amplification method is preferably PCR method.
• the nucleic acid amplification method is preferably the PCR method or the RT-PCR method (reverse transcription PCR method). That is, the compositions of the present invention are preferably used in PCR or RT-PCR methods.
• the PCR method or RT-PCR method is preferably a real-time PCR method or a real-time RT-PCR method, more preferably a real-time RT-PCR method using a one-step RT-real-time PCR reagent.
• the one-step RT-real-time PCR reagent means a reagent used for performing reverse transcription reaction and PCR reaction continuously or in parallel in one step and measuring the PCR product over time.
• the nucleic acid to be amplified is preferably RNA from an RNA virus, more preferably RNA from SARS-CoV-2.
• the polymer of the present invention is a homopolymer composed of structural units derived from 2-acryloyloxyethylphosphorylcholine, a homopolymer composed of structural units derived from 2-methacryloyloxyethylphosphorylcholine, or derived from 2-acryloyloxyethylphosphorylcholine. It may be a copolymer composed of a structural unit derived from 2-methacryloyloxyethylphosphorylcholine and a structural unit derived from 2-methacryloyloxyethylphosphorylcholine. The copolymer may be a random copolymer, a block copolymer, or a copolymer containing both random and block portions.
• the polymer of the present invention is preferably a homopolymer consisting of structural units derived from 2-(meth)acryloyloxyethylphosphorylcholine (i.e. , a homopolymer consisting of structural units derived from 2-acryloyloxyethylphosphorylcholine or a homopolymer consisting of structural units derived from 2-methacryloyloxyethylphosphorylcholine), more preferably derived from 2-methacryloyloxyethylphosphorylcholine It is a homopolymer consisting of structural units.
• 2-(meth)acryloyloxyethylphosphorylcholine i.e. , a homopolymer consisting of structural units derived from 2-acryloyloxyethylphosphorylcholine or a homopolymer consisting of structural units derived from 2-methacryloyloxyethylphosphorylcholine
• 2-methacryloyloxyethylphosphorylcholine i.e.
• the polymer of the present invention in addition to a structural unit (structural unit (1)) derived from 2-(meth)acryloyloxyethylphosphorylcholine (monomer (1)), is different from the monomer (1).
• a copolymer containing other structural units derived from the monomer may also be used.
• Other monomers may be used alone or in combination of two or more.
• the copolymer may be a random copolymer, a block copolymer, or a copolymer containing both random and block portions.
• structural units include, for example, a structural unit derived from an alkyl (meth) acrylate containing no hydroxy group (hereinafter sometimes referred to as “monomer (2)”) (hereinafter referred to as “structural unit (2) ”) can be mentioned.
• the alkyl of the alkyl (meth)acrylate may have a substituent other than a hydroxy group. Examples of the substituent include a halogen atom, an epoxy group, an alkoxy group such as a methoxy group, an aryl group such as a phenyl group, an aryloxy group such as a phenoxy group, and a heterocyclic group such as a tetrahydrofuranyl group.
• Monomer (2) may be used alone or in combination of two or more. That is, the polymer of the present invention may contain one or more structural units (2).
• Examples of the monomer (2) include methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, butyl (meth)acrylate, pentyl (meth)acrylate, hexyl (meth)acrylate, heptyl (meth)acrylate, ) acrylate, octyl (meth)acrylate, nonyl (meth)acrylate, decyl (meth)acrylate, undecyl (meth)acrylate, dodecyl (meth)acrylate, tridecyl (meth)acrylate, tetradecyl (meth)acrylate, pentadecyl (meth)acrylate , cetyl (meth)acrylate, heptadecyl (meth)acrylate, stearyl (meth)acrylate, benzyl (meth)acrylate, phenoxyethyl (meth)acrylate, tetrahydro
• Monomer (2) can use a commercial item.
• a total of 100 moles of the structural unit (1) and the structural unit (2) (that is, the The amount of the structural unit (1) (that is, the monomer (1) used in the polymerization) is preferably 5 to 95 per 100 moles of the total of the monomer (1) and the monomer (2).
• mol, more preferably 20 to 80 mol, more preferably 60 to 80 mol, and the amount of the structural unit (2) (that is, the monomer (2) used in the polymerization) is preferably 5 to 95 mol, More preferably 20 to 80 mol, still more preferably 20 to 40 mol.
• structural units include, for example, a structural unit derived from a hydroxy group-containing alkyl (meth)acrylate (hereinafter sometimes referred to as “monomer (3)”) (hereinafter referred to as “structural unit (3)” may be described).
• Monomer (3) may be used alone or in combination of two or more. That is, the polymer of the present invention may contain one or more structural units (3).
• the number of hydroxy groups in the monomer (3) is preferably 2 or more, more preferably 2-5.
• the monomer (3) include glycerin mono(meth)acrylate, threitol mono(meth)acrylate, erythritol mono(meth)acrylate, xylitol mono(meth)acrylate, arabitol mono(meth)acrylate, mannitol mono(meth)acrylate, (Meth)acrylate, galactitol mono(meth)acrylate, sorbitol mono(meth)acrylate and the like.
• glycerin mono(meth)acrylate is preferred, and glycerin monomethacrylate is more preferred.
• monomer (3) A commercially available product may be used as the monomer (3), or it may be produced by a known method.
• monomer (3) can be produced by an esterification reaction between (meth)acrylic acid or its derivative (eg, acid chloride) and a polyhydric alcohol having 3 or more hydroxy groups.
• the esterification reaction is well known, and a person skilled in the art can set the conditions appropriately and perform the reaction.
• a total of 100 moles of the structural unit (1) and the structural unit (3) (that is, the The amount of the structural unit (1) (that is, the monomer (1) used in the polymerization) is preferably 5 to 95 per 100 moles of the total of the monomer (1) and the monomer (3). mol, more preferably 20 to 80 mol, and the amount of the structural unit (3) (that is, the monomer (3) used in the polymerization) is preferably 5 to 95 mol, more preferably 20 to 80 mol. be.
• the polymer of the present invention contains the structural unit (1), the structural unit (2) and the structural unit (3), from the viewpoint of stabilization, the structural unit (1), the structural unit (2) and the structural unit (3) ) (i.e., total 100 mol of monomer (1), monomer (2) and monomer (3) used in polymerization), the amount of structural unit (1) (i.e.
• the monomer (1) used in the polymerization is preferably 5 to 90 mol, more preferably 10 to 80 mol, still more preferably 30 to 50 mol, and the amount of the structural unit (2) (that is, the polymerization
• the monomer (2) used in the above is preferably 5 to 90 mol, more preferably 10 to 80 mol, and still more preferably 30 to 50 mol, and the amount of the structural unit (3) (that is, used for polymerization
• the monomer (3)) is preferably 5 to 90 mol, more preferably 10 to 80 mol, still more preferably 10 to 40 mol.
• the polymer of the present invention is a monomer (hereinafter sometimes referred to as "monomer (4)") different from the above-described structural unit (1), structural unit (2) and structural unit (3). It may contain a structural unit derived from (hereinafter sometimes referred to as “structural unit (4)"). Monomer (4) may be used alone or in combination of two or more. That is, the polymer of the present invention may contain one or more structural units (4).
• Examples of the monomer (4) include alkenyl (meth)acrylates such as allyl (meth)acrylate; cycloalkyl (meth)acrylates such as cyclohexyl (meth)acrylate; (meth)acrylic acids such as isobornyl (meth)acrylate. and monoterpene alcohol; styrene-based monomers such as styrene, methylstyrene and chloromethylstyrene; vinyl ether-based monomers such as methyl vinyl ether and butyl vinyl ether; vinyl ester-based monomers such as vinyl acetate and vinyl propionate A body etc. are mentioned.
• alkenyl (meth)acrylates such as allyl (meth)acrylate
• cycloalkyl (meth)acrylates such as cyclohexyl (meth)acrylate
• (meth)acrylic acids such as isobornyl (meth)acrylate. and monoterpene alcohol
• the amount of the structural unit (4) in the polymer of the present invention is preferably 40 mol% or less, more preferably 20 mol% or less, relative to all structural units. More preferably, the polymer of the present invention does not contain the structural unit (4).
• the polymer of the present invention is preferably a homopolymer consisting of one type of structural unit (1), a copolymer consisting of a structural unit (1) and a structural unit (2), a structural unit (1), a structural unit ( 2) and at least one selected from the group consisting of a copolymer consisting of a structural unit (3), more preferably a homopolymer consisting of one structural unit (1), a structural unit (1) and a structural unit It is a copolymer consisting of (2), or a copolymer consisting of structural unit (1), structural unit (2) and structural unit (3).
• a homopolymer consisting of one type of structural unit (1) means a homopolymer in which all of its structural units (repeating units) consist of one type of structural unit (1).
• a copolymer consisting of a structural unit (1) and a structural unit (2) refers to a copolymer in which all of its structural units (repeating units) consist of a structural unit (1) and a structural unit (2).
• “Copolymer consisting of structural unit (1), structural unit (2) and structural unit (3)” means that all structural units (repeating units) are structural unit (1), structural unit (2 ) and the structural unit (3). Other similar expressions have similar meanings.
• the weight average molecular weight of the polymer of the present invention is not particularly limited, it is preferably 5,000 to 2,000,000, more preferably 10,000 to 1,500,000.
• the weight average molecular weight can be determined in terms of polyethylene glycol by gel filtration chromatography using EcoSEC system (manufactured by Tosoh Corporation) or the like.
• the copolymer of the present invention can be produced by a known method (eg, the method described in International Publication No. 2018/216628).
• the concentration of the polymer of the present invention in the composition for nucleic acid amplification is preferably 0.0001 w/v% or more, more preferably 0.0005 w/v% or more, still more preferably 0.0005 w/v% or more, from the viewpoint of stability.
• the concentration means the total concentration of the two or more polymers of the invention. Concentrations or amounts listed for other ingredients below also refer to the sum of the concentrations or amounts of two or more such ingredients when more than one such ingredient is used.
• Preferred examples of the polymer of the present invention include the following polymer (I) and polymer (II) of the present invention.
• the polymer (I) of the present invention is at least one selected from the group consisting of the following homopolymer (I-1), copolymer (I-2) and copolymer (I-3), Preferred are the following homopolymers (I-1), copolymers (I-2) or copolymers (I-3): 2-(meth) homopolymer (I-1) consisting of a structural unit (1) derived from acryloyloxyethylphosphorylcholine; a structural unit (1) derived from 2-(meth)acryloyloxyethylphosphorylcholine; Structural unit (2) derived from butyl (meth)acrylate, stearyl (meth)acrylate or benzyl (meth)acrylate, and structural unit (1) and structural unit (2) for a total of 100 mol Copolymer (I-2) in which the amount of unit (1) is 5 to 95 mol and the amount of structural unit (2) is 5 to 95 mol; and derived from 2-(
• the amount of the structural unit (1) in the copolymer (I-2) is 20 to 80 mol, and the amount of the structural unit (2) is 20 to 80 mol.
• the amount of the structural unit (1) in the copolymer (I-3) is 10 to 80 mol
• the amount of the structural unit (2) is 10 to 80 mol
• the amount of the structural unit (3) is preferably 10 to 80 mol.
• the amount of the structural unit in the copolymer (I-2) is based on the total amount of the structural unit (1) and the structural unit (2) of 100 mol
• the amount of the structural unit in the copolymer (I-3) is The standard amount of structural units is 100 mol in total of structural unit (1), structural unit (2) and structural unit (3).
• the amount of the structural unit (1) in the copolymer (I-2) is 60 to 80 mol, and the amount of the structural unit (2) is 20 to 40 mol.
• the amount of the structural unit (1) in the copolymer (I-3) is 30 to 50 mol
• the amount of the structural unit (2) is 30 to 50 mol
• the amount of the structural unit (3) is more preferably 10 to 40 mol.
• the amount of the structural unit in the copolymer (I-2) is based on the total amount of the structural unit (1) and the structural unit (2) of 100 mol
• the amount of the structural unit in the copolymer (I-3) is The standard amount of structural units is 100 mol in total of structural unit (1), structural unit (2) and structural unit (3).
• the polymer (II) of the present invention is at least one selected from the group consisting of the following homopolymer (II-1), copolymer (II-2) and copolymer (II-3), Preferred are the following homopolymer (II-1), copolymer (II-2) or copolymer (II-3): Homopolymer (II-1) consisting of a structural unit (1) derived from 2-methacryloyloxyethylphosphorylcholine; A structural unit (1) derived from 2-methacryloyloxyethylphosphorylcholine; and a structural unit (2) derived from butyl methacrylate, stearyl methacrylate or benzyl methacrylate, and the amount of the structural unit (1) is 20 per 100 moles in total of the structural unit (1) and the structural unit (2).
• a copolymer (II-2) having a molecular weight of ⁇ 80 mol and an amount of the structural unit (2) of 20 to 80 mol; and a structural unit (1) derived from 2-methacryloyloxyethylphosphorylcholine, A structural unit (2) derived from butyl methacrylate, stearyl methacrylate or benzyl methacrylate and a structural unit (3) derived from glycerin monomethacrylate, and structural unit (1), structural unit (2) and structural unit (3)
• the amount of structural unit (1) is 10 to 80 mol
• the amount of structural unit (2) is 10 to 80 mol
• the amount of structural unit (3) is 10 to 80 mol, relative to the total 100 mol of Copolymer (II-3) which is mol.
• the amount of the structural unit (1) in the copolymer (II-2) is 60 to 80 mol, and the amount of the structural unit (2) is 20 to 40 mol.
• the amount of the structural unit (1) in the copolymer (II-3) is 30 to 50 mol
• the amount of the structural unit (2) is 30 to 50 mol
• the amount of the structural unit (3) is preferably 10 to 40 mol.
• the amount of the structural unit in the copolymer (II-2) is based on the total amount of the structural unit (1) and the structural unit (2) of 100 mol, and the amount of the structural unit in the copolymer (II-3) is The standard amount of structural units is 100 mol in total of structural unit (1), structural unit (2) and structural unit (3).
• composition of the present invention can be prepared by dissolving the polymer in a solvent such as water, optionally together with other components used for nucleic acid amplification. That is, the composition of the present invention is preferably a composition comprising said polymer and water (and optionally other ingredients).
• nucleic acid amplification As other components used for nucleic acid amplification, known components used for known nucleic acid amplification typified by PCR can be used. Such components include, for example, pH buffers, metal salts, nucleic acid synthase, primers, dideoxynucleoside triphosphates (dNTPs), and the like. Any of the other components may be used alone or in combination of two or more.
• dNTPs dideoxynucleoside triphosphates
• pH buffer solutions examples include EDTA (ethylenediaminetetraacetic acid) solution, Tris-HCL (trishydroxymethylaminomethane-hydrochloric acid) solution, TAE (tris-acetic acid-EDTA) solution, and TE (tris-EDTA buffer) solution. be done.
• EDTA ethylenediaminetetraacetic acid
• Tris-HCL trishydroxymethylaminomethane-hydrochloric acid
• TAE tris-acetic acid-EDTA
• TE tris-EDTA buffer
• metal salts include magnesium chloride, manganese(II) acetate, sodium sulfate, sodium dodecylsulfate and the like.
• nucleic acid synthetase examples include DNA polymerase, RNA polymerase, reverse transcriptase and the like.
• primers include oligonucleotides with a length of 10 to 40 bases.
• the length of said oligonucleotide is preferably 15-30 bases, more preferably 17-25 bases.
• the oligonucleotides can be designed and prepared by known methods.
• the oligonucleotides may have fluorescent groups formed from fluorescein and the like.
• the primer concentration in the composition of the present invention is preferably 0.01-10 ⁇ M, more preferably 0.05-5.0 ⁇ M, still more preferably 0.1-3.0 ⁇ M.
• Dideoxynucleoside triphosphates include, for example, deoxyadenosine triphosphate (dATP), deoxyguanosine triphosphate (dGTP), deoxythymidine triphosphate (dTTP), and deoxycytidine triphosphate (dCTP). be done.
• dATP deoxyadenosine triphosphate
• dGTP deoxyguanosine triphosphate
• dTTP deoxythymidine triphosphate
• dCTP deoxycytidine triphosphate
• Still other ingredients include bovine serum albumin, dimethylsulfoxide, dimethylformamide, betaine, formamide, gelatin, glycerol, polyethylene glycol, spermidine, T4 Gane 32 protein, 4-(1,1,3,3-tetramethylbutyl) phenyl-polyethylene glycol, tert-octylphenoxypolyethoxyethanol, polyethylene glycol tert-octylphenyl ether, urea and the like.
• the present invention also provides a nucleic acid amplification method comprising mixing the composition of the present invention with a sample containing a nucleic acid to be amplified to prepare a reaction solution for nucleic acid amplification.
• the polymer of the present invention and the composition of the present invention in the nucleic acid amplification method of the present invention are as described above.
• the explanation of the nucleic acid amplification method is also as described above, unless otherwise specified.
• the sample used in the nucleic acid amplification method of the present invention contains nucleic acids to be amplified.
• the sample is preferably a sample solution containing water and nucleic acids to be amplified.
• a sample may contain one type of nucleic acid, or may contain two or more types of nucleic acid.
• the concentration of the nucleic acid in the sample is appropriately determined according to the purpose of nucleic acid amplification, but if the concentration can be adjusted, it is preferably 1 to 10 20 copies/ ⁇ L, more preferably 1 to 10 10 copies/ ⁇ L. , more preferably 1 to 10 5 copies/ ⁇ L, particularly preferably 1 to 500 copies/ ⁇ L, and most preferably 1 to 100 copies/ ⁇ L.
• the nucleic acid to be amplified is preferably RNA from an RNA virus, more preferably RNA from SARS-CoV-2.
• the amount of sample used is preferably a trace amount to 1 ⁇ L, more preferably 0.01 to 1 ⁇ L, more preferably 0.2 to 1 ⁇ L, per 1 ⁇ L of the composition of the present invention. 0.4 ⁇ L.
• the nucleic acid amplification method of the present invention is preferably a PCR method or an RT-PCR method, more preferably a real-time PCR method or a real-time RT-PCR method, and more preferably a one-step RT-real-time RT-PCR method using a real-time PCR reagent. PCR method.
• polymer 1 The weight average molecular weight of polymer 1 was 1,030,000 in terms of polyethylene glycol as measured by gel permeation chromatography (hereinafter sometimes abbreviated as "GPC") under the conditions described later.
• GPC gel permeation chromatography
• Examples 1 to 5 SARS-CoV-2 RT-qPCR Detection Kit (manufactured by FUJIFILM Wako Pure Chemical Industries, Ltd.) was used to prepare a solution before polymer addition (hereinafter "solution A") in the following amounts.
• solution A a solution before polymer addition
• Table 2 The composition of Solution A is as shown in Table 2 below.
• Example 1 2 ⁇ L of aqueous solutions of 0.5 w/v% polymers 1 to 5 were added to each well of solution A having the composition shown in Table 2, and 15 ⁇ L of the composition for nucleic acid amplification was added. (concentration of each polymer in the composition: 0.067 w/v%).
• a sample solution having a nucleic acid concentration of 10 copies/ ⁇ L was prepared using Positive Control RNA, N set No.2 (N2) attached to the kit.
• the resulting sample solution was added to the composition for nucleic acid amplification in an amount of 5 ⁇ L per well to prepare a PCR reaction solution (concentration of each polymer in the PCR reaction solution: 0.050 w/v%).
• PCR was performed using StepOnePlus TM Real-Time PCR System (manufactured by Applied Biosystems), which is a qPCR device, and fluorescence intensity at the endpoint of the PCR reaction solution was measured.
• the temperature program is as shown in Table 3 below.
• the fluorescence intensity of the endpoint of the PCR reaction solution was measured in the same manner as described above except that the sample solution was added to the composition for nucleic acid amplification. .
• the average value of the fluorescence intensity (3 measurements) obtained using the composition for nucleic acid amplification that was not incubated (hereinafter referred to as “average fluorescence intensity before incubation”) and the nucleic acid amplification that was incubated Using the average value of fluorescence intensity (measured three times) obtained using the composition (hereinafter referred to as “average value of fluorescence intensity after incubation”), the following formula:
• Comparative Example 1 In Comparative Example 1, except that a composition obtained by adding 2 ⁇ L of Distilled Water and Nuclease-free per well to Solution A having the composition shown in Table 2 was used as a composition for nucleic acid amplification. Fluorescence intensity ratios were calculated in the same manner as in 1-5. The results are listed in Table 4 below.
• Example 6 to 8 In Examples 6 to 8, 2 ⁇ L of 5 w/v% aqueous solutions of polymers 1 to 3 were added to each well of solution A having the composition shown in Table 2 to prepare 15 ⁇ L of a composition for nucleic acid amplification. Except for this, the fluorescence intensity ratio was calculated in the same manner as in Examples 1 to 5 (concentration of each polymer in the composition: 0.67 w/v%, concentration of each polymer in the PCR reaction solution: 0.67 w/v%). 50 w/v%). The results are listed in Table 5 below.
• Example 9 In Example 9, 2 ⁇ L of an aqueous solution of 0.5 w/v% polymer 1 was added to each well of solution A having the composition shown in Table 2 to prepare 15 ⁇ L of a composition for nucleic acid amplification (composition Concentration of polymer 1 in the product: 0.067 w/v%). This composition for nucleic acid amplification was incubated at 4° C. for 1 and 3 months to prepare a sample solution having a nucleic acid concentration of 40 copies/ ⁇ L. The intensity ratio and the fluorescence intensity ratio after 3 months of incubation were calculated (concentration of polymer 1 in PCR reaction solution: 0.050 w/v%). The results are listed in Table 6 below.
• Comparative Example 2 In Comparative Example 2, except that a composition obtained by adding 2 ⁇ L of Distilled Water and Nuclease-free per well to Solution A having the composition shown in Table 2 was used as a composition for nucleic acid amplification. 9, the fluorescence intensity ratio after one month of incubation and the fluorescence intensity ratio after three months of incubation were calculated. The results are listed in Table 6 below.
• composition of the present invention has excellent storage stability.
• the composition of the present invention can be suitably used in nucleic acid amplification methods (particularly PCR methods) for genetic testing, microbial testing, virus testing, and the like.

Landscapes

• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Zoology (AREA)
• Proteomics, Peptides & Aminoacids (AREA)
• Engineering & Computer Science (AREA)
• Wood Science & Technology (AREA)
• Polymers & Plastics (AREA)
• Medicinal Chemistry (AREA)
• Molecular Biology (AREA)
• General Engineering & Computer Science (AREA)
• Immunology (AREA)
• Biotechnology (AREA)
• Biophysics (AREA)
• Biochemistry (AREA)
• Bioinformatics & Cheminformatics (AREA)
• Microbiology (AREA)
• General Health & Medical Sciences (AREA)
• Genetics & Genomics (AREA)
• Analytical Chemistry (AREA)
• Physics & Mathematics (AREA)
• Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
• Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

ID=82654426

Family Applications (1)

Country Status (6)

Cited By (5)

Citations (2)

Family Cites Families (1)

• 2022
  • 2022-01-21 JP JP2022578314A patent/JPWO2022163507A1/ja active Pending
  • 2022-01-21 WO PCT/JP2022/002103 patent/WO2022163507A1/ja not_active Ceased
  • 2022-01-21 EP EP22745728.0A patent/EP4286533A4/en not_active Withdrawn
  • 2022-01-21 US US18/263,427 patent/US20240309131A1/en active Pending
  • 2022-01-21 KR KR1020237029064A patent/KR20230137403A/ko active Pending
  • 2022-01-21 CN CN202280011960.0A patent/CN116888275A/zh active Pending

Patent Citations (2)

Non-Patent Citations (3)

Also Published As

Similar Documents

Legal Events