WO2023282164A1 - プローブ、プローブセット、及び哺乳動物の核酸検出キット - Google Patents
プローブ、プローブセット、及び哺乳動物の核酸検出キット Download PDFInfo
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- 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
- C12Q1/6813—Hybridisation assays
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- 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
- C12Q1/6876—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes
- C12Q1/6888—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes for detection or identification of organisms
Definitions
- the present invention relates to probes, probe sets, and mammalian nucleic acid detection kits. This application claims priority based on Japanese Patent Application No. 2021-113260 filed in Japan on July 8, 2021, the content of which is incorporated herein.
- Fluorescence In Situ Hybridization which is one of the methods of transcriptome analysis, can detect the expression distribution and expression level of specific nucleic acids in tissues and cells by fluorescence.
- the seqFISH (Sequential Fluorescence In Situ Hybridization) method is a technique that can directly identify many RNA transcripts within a single cell while maintaining spatial localization.
- transcripts are first labeled with fluorescent probes by successive rounds of hybridization to read the sequential barcode of each transcript, and then the sequential barcodes are decoded to identify the transcripts present in a single cell. to uniquely identify the RNA transcript (see, for example, Patent Document 1, etc.).
- the limit of optical resolution and the density of transcripts in a single cell are problems.
- the seqFISH+ method which can image the mRNA of 10,000 genes in a single cell with high precision and sub-diffraction limit resolution using a standard confocal microscope. have been developed (see, for example, Non-Patent Document 1).
- Non-Patent Document 1 When detecting mammalian nucleic acids by the FISH method described in Patent Document 1, Non-Patent Document 1, etc., it is necessary to develop a probe consisting of a sequence that does not exist in the mammalian genome. Designing such probes is extremely difficult, and only about several dozen types of probes have been released to the public at present. Therefore, the number of simultaneously detectable genes is limited to about 20-30.
- the present invention has been made in view of the above circumstances, and provides a probe consisting of a nucleotide sequence that does not exist in mammalian genomes.
- the present invention includes the following aspects. (1) consisting of a nucleotide sequence that does not hybridize to mammalian nucleic acids under stringent conditions; A probe consisting of a sequence containing the base sequence represented by any one of SEQ ID NOS: 1-673. (2) The probe according to (1), wherein the mammal is one or more animals selected from the group consisting of humans and mice. (3) the mammal is one or more animals selected from the group consisting of humans, mice, zebrafish, Xenopus laevis, and rats, SEQ.
- one or more detection probes comprising the probe according to (4); one or more capture probes having a sequence A complementary to at least a portion of said detection probe and a sequence B complementary to at least a portion of a mammalian target nucleic acid; with When two or more of the detection probes are provided, the two or more detection probes do not hybridize to each other under stringent conditions, and A mammalian nucleic acid detection kit, wherein when two or more of the capture probes are provided, the two or more of the capture probes do not hybridize to each other under stringent conditions.
- the probe of the above aspect it is possible to provide a probe consisting of a nucleotide sequence that does not exist in mammalian genomes.
- FIG. 10 is a fluorescent image of mRNA in mouse ES cells visualized by smFISH using three types of probes in Example 2.
- FIG. 10 is a fluorescent image of mRNA in mouse ES cells visualized by smFISH using three types of probes in Example 2.
- the probe of this embodiment consists of a nucleotide sequence that does not hybridize to mammalian nucleic acids under stringent conditions, and comprises a nucleotide sequence represented by any one of SEQ ID NOS: 1-673.
- the inventors screened probes consisting of base sequences that do not exist in the entire genome sequences of mammals (especially humans and mice) from a probe library designed by an original algorithm to obtain the present invention. was completed.
- the nucleotide sequences represented by SEQ ID NOs: 1 to 673 consist of 15 bases each, and are nucleotide sequences that do not exist in the whole genome sequences of human and mouse, and have been discovered by the inventor for the first time.
- Probe means a molecule or molecular complex used to detect nucleic acids. Since the probe of the present embodiment comprises a base sequence that does not hybridize with mammalian nucleic acids under stringent conditions, it binds to the capture probe when detecting mammalian nucleic acids, as described later, and It is suitably used as a detection probe for detecting animal nucleic acids. That is, a probe consisting of a sequence containing the nucleotide sequence represented by any one of SEQ ID NOs: 1 to 673 is preferably used as a detection probe for detecting human or mouse nucleic acids.
- Under stringent conditions refers to conditions under which specific hybrids are formed and non-specific hybrids are not formed.
- stringent conditions more specifically, for example, 5 ⁇ SSC (composition of 20 ⁇ SSC: 3M sodium chloride, 0.3M citric acid solution, pH 7.0), 0.1% by weight N-lauroylsarcosine , 0.02% by weight SDS, 2% by weight blocking reagent for nucleic acid hybridization, and 50% formamide in a hybridization buffer at 55°C or higher and 70°C or lower for several hours to overnight. and hybridizing conditions.
- the washing buffer used for washing after incubation is preferably 0.1% by weight SDS-containing 1 ⁇ SSC solution, more preferably 0.1% by weight SDS-containing 0.1 ⁇ SSC solution.
- the nucleic acid that constitutes the probe of the present embodiment can have a length of, for example, 10 to 50 bases, preferably 10 to 30 bases.
- the nucleic acid that constitutes the probe of this embodiment may further contain other sequences in addition to the base sequences represented by any of SEQ ID NOS: 1-673, and is represented by any of SEQ ID NOS: 1-673. It is preferable to consist only of the base sequence of
- Nucleic acid means a polymeric organic compound in which nitrogen-containing bases derived from purines or pyrimidines, sugars and phosphoric acids are regularly bound, and includes nucleic acid analogs and the like.
- the nucleic acid that constitutes the probe of this embodiment may be DNA or RNA.
- the probe of the present embodiment is not limited to those made of natural nucleic acids, and artificial nucleic acids such as BNA, ethylene-crosslinked nucleic acid (ENA), peptide nucleic acid (PNA), glycol nucleic acid (GNA), and threose nucleic acid (TNA). It may also contain nucleic acids.
- the probe of this embodiment may further have a labeling substance. That is, the probe of this embodiment consists of a nucleotide sequence that does not hybridize to mammalian nucleic acids under stringent conditions, and comprises a sequence that includes the nucleotide sequence represented by any one of SEQ ID NOs: 1 to 673; and a labeling substance.
- Labeling substance means a substance that directly or indirectly generates a detectable signal by chemical or physical means.
- labeling substances include enzyme labels such as peroxidase (eg, horseradish peroxidase) and alkaline phosphatase; carboxyfluorescein (FAM), 6-carboxy-4',5'-dichloro2',7'-dimethoxyfluorescein (JOE ), fluorescein isothiocyanate (FITC), tetrachlorofluorescein (TET), 5′-hexachloro-fluorescein-CE phosphoramidite (HEX), fluorescent labels such as Cy3, Cy5, Alexa488, Alexa555, Alexa568, Alexa647; electrochemiluminescent labels such as ruthenium complexes; metal nanoparticles and the like, but are not limited thereto.
- Preferred labeling substances include fluorescent labels (fluorochromes).
- the labeling substance is bound directly or indirectly via a linker or the like to the 5'-end or 3'-end of the nucleic acid in the probe.
- linker is meant a linking moiety that links two substances or a molecule that is used to link two substances.
- the probe set of this embodiment comprises two or more of the probes described above, and the two or more of said probes do not hybridize to each other under stringent conditions.
- two or more of the probes do not hybridize to each other under stringent conditions, so that multiple target nucleic acids can be detected simultaneously with high accuracy.
- the probe set of this embodiment comprises 2 or more, preferably 10 or more, more preferably 50 or more, still more preferably 100 or more, particularly preferably 200 or more, and most preferably 240 or more of the probes described above.
- the probe set of the present embodiment includes more types of probes than the above lower limit, more mammalian nucleic acids can be detected at the same time.
- 240 or more probes as described above are provided, simultaneous detection of total mRNA of a specific mammal (particularly human or mouse) by smFISH becomes possible.
- the probes when the probes have labeling substances, it is preferable that two or more of the probes have labeling substances different from each other.
- the mammalian nucleic acid detection kit of the present embodiment (hereinafter sometimes simply referred to as the "nucleic acid detection kit of the present embodiment") comprises one or more detection probes and one or more capture probes.
- a detection probe consists of a probe with a labeling substance as described above. That is, the detection probe comprises a nucleotide sequence that does not hybridize to mammalian nucleic acids under stringent conditions, and comprises a nucleic acid comprising a nucleotide sequence represented by any one of SEQ ID NOs: 1 to 673, and a labeling substance.
- labeling substances include those exemplified in the above "probe", and among them, fluorescent labeling (fluorochrome) is preferable.
- the two or more types of detection probes when two or more types of detection probes are provided, the two or more types of detection probes preferably have different labeling substances.
- the capture probe has a sequence A complementary to at least a portion of said detection probe and a sequence B complementary to at least a portion of a mammalian target nucleic acid.
- the two or more types of the detection probes do not hybridize to each other under stringent conditions
- the two or more types of the capture probes are provided, the two or more types of the capture probes are The probes do not hybridize to each other under stringent conditions. Thereby, a plurality of target nucleic acids can be detected simultaneously with high accuracy.
- the target nucleic acid is not particularly limited as long as it is derived from mammals, and may be DNA or RNA.
- Mammals include, but are not limited to, humans, chimpanzees and other primates; dogs, cats, rabbits, horses, sheep, goats, cows, pigs, rats (including nude rats), mice (nude mice and skid mice), livestock animals such as hamsters and guinea pigs, pet animals and laboratory animals, etc., but are not limited thereto.
- a human or a mouse is preferable as a mammal from which the target nucleic acid is derived.
- sequence A consists of a sequence complementary to at least part of the detection probe.
- the capture probe, having sequence A, can hybridize with the detection probe under stringent conditions to detect the target nucleic acid.
- the sequence A preferably consists of a sequence complementary to a sequence having a length of about 10 to 50 consecutive bases among the nucleic acids constituting the detection probe.
- the nucleic acids constituting it is particularly preferable that it consists of a sequence complementary to the base sequence represented by any one of SEQ ID NOs: 1 to 673.
- the length of sequence A can be, for example, 10 to 50 bases, preferably 10 to 30 bases.
- sequence B is a sequence complementary to at least part of the mammalian target nucleic acid. Having the sequence B, the capture probe can hybridize with the target nucleic acid under stringent conditions to capture the target nucleic acid.
- the length of sequence B can be, for example, 10 bases or more and 2000 bases or less, and can be 50 bases or more and 1500 bases or less.
- the nucleic acid that constitutes the capture probe may be DNA or RNA.
- capture probes are not limited to natural nucleic acids, and include artificial nucleic acids such as BNA, ethylene-bridged nucleic acid (ENA), peptide nucleic acid (PNA), glycol nucleic acid (GNA), and threose nucleic acid (TNA). It's okay.
- the nucleic acid detection kit of this embodiment may contain other elements in addition to the detection probe and the capture probe.
- Other components include, for example, detection reagents for labeled substances, sample preparation reagents, diluents, buffers (washing buffers, etc.), instructions for use, and the like.
- the nucleic acid detection kit of this embodiment can be used in a method for simultaneously detecting multiple nucleic acids in mammals. Specifically, it can be used for transcriptome analysis by various ISH methods such as seqFISH, and detection of structural changes in the genome.
- a method for simultaneously detecting a plurality of mammalian nucleic acids is a method using the nucleic acid detection kit, contacting two or more of said capture probes with a mammalian cell or tissue; After removing the unhybridized capture probes by washing, contacting two or more of the detection probes with mammalian cells or tissues; After removing the unhybridized detection probe by washing, detecting the detection probe; including.
- the capture probes and detection probes are diluted in various known buffers and added to mammalian cells or tissues.
- the mammalian cell or tissue may be any cell or tissue derived from the mammals described above, and in the case of mammals including humans, it can be performed in vitro. can be performed in vivo. That is, target cells or tissues may be immobilized, cultured, or functioning in vivo.
- Contact between the capture probes and mammalian cells or tissues is carried out by incubating at 30° C. or higher and 45° C. or lower (preferably about 37° C.) for 24 hours or longer and 60 hours or shorter (preferably 36 hours or longer and 48 hours or shorter). can be done.
- Contact between the detection probe and mammalian cells or tissues can be carried out by incubating at 30°C or higher and 45°C or lower (preferably about 42°C) for 10 hours or more and 24 hours or less (preferably about 16 hours).
- the capture probe and detection probe are washed once or more using a known washing buffer.
- a detection method for the detection probe can be appropriately selected according to the type of labeling substance contained in the detection probe. Specifically, for example, when the labeling substance is a fluorescent substance, a method of detection using a confocal microscope may be used. Therefore, according to the method of simultaneously detecting a plurality of mammalian nucleic acids of the present embodiment, a large number of various mammalian nucleic acids can be detected simultaneously.
- Example 1 (Preparation of probe) The inventor prepared a probe library consisting of random base sequences designed by an original algorithm. Next, for the base sequence of each probe in the prepared probe library, the sequence identity with the whole genome sequence of human and mouse is determined by Web version BLAST (human, mouse) using Genomic + transcript databases, and Refseq transcript data is used as an index. Bowtie2 (human, mouse, zebrafish, Xenopus laevis, and rat) was used to screen probes consisting of nucleotide sequences not present in the entire genome sequences of human, mouse, zebrafish, Xenopus, and rat.
- SEQ ID NOs: 673 types of probes consisting of base sequences represented by SEQ ID NOs: 1 to 673 were obtained as probes consisting of base sequences that do not exist in the entire human and mouse genome sequences.
- Example 2 (Visualization test of mRNA in mouse ES cells by smFISH method using three types of probes)
- a visualization test of mRNA in mouse ES cells was performed. As fluorescent substances, Alexa647 was bound to ReadOut-12, Cy3B was bound to ReadOut-85, and Alexa488 was bound to ReadOut-170.
- the procedure of the smFISH method was performed by a known method. Specifically, first, mouse ES cells were previously cultured on a slide glass, and the cells were fixed with 4 v/v% paraformaldehyde at room temperature for 10 minutes. The samples were then added with 70% ethanol and incubated for 1 hour. After that, probes shown in Tables 2-1 to 4-2 below targeting Dnmt3b mRNA, Adgrg6 mRNA, and Vgf mRNA were added to the sample as capture probes, and incubated at 37°C for 36 hours or more and 48 hours or less. and hybridized.
- the probe of this embodiment consists of a base sequence that does not exist in the genome of mammals, and can be used to simultaneously detect a large number of various mammalian nucleic acids.
Abstract
Description
本願は、2021年7月8日に、日本に出願された特願2021-113260号に基づき優先権を主張し、その内容をここに援用する。
(1) 哺乳動物の核酸とストリンジェントな条件下でハイブリダイズしない塩基配列からなり、
配列番号1~673のいずれかに表される塩基配列を含む配列からなる、プローブ。
(2) 前記哺乳動物がヒト及びマウスからなる群より選ばれる1種以上の動物である、(1)に記載のプローブ。
(3) 前記哺乳動物が、ヒト、マウス、ゼブラフィッシュ、アフリカツメガエル、及びラットからなる群より選ばれる1種以上の動物であって、
配列番号6、22、31、42、43、54、61、71、86~88、91、109、114、118、125、128、134、140、141、146、149、151、157、167、201、213、214、218、220、221、228、230、234、241、242、248、253、283、289、294、298、303、305、310、327、349、363、365、375、378、385、394、400、406、412、416、418、420、421、430、431、439、475、501、523、532、548、557、563、585、589、593、608、620、631、642、646のいずれかに表される塩基配列を含む配列からなる、(1)又は(2)に記載のプローブ。
(4) 標識物質を更に有する、(1)~(3)のいずれか一つに記載のプローブ。
(5) 2種以上の、(1)~(4)のいずれか一つに記載のプローブを備え、
2種以上の前記プローブは互いにストリンジェントな条件下でハイブリダイズしない、プローブセット。
(6) (4)に記載のプローブからなる検出プローブを1種以上と、
前記検出プローブの少なくとも一部と相補的な配列Aと、哺乳動物の標的核酸の少なくとも一部と相補的な配列Bと、を有する捕捉プローブを1種以上と、
を備え、
前記検出プローブを2種以上備える場合に、2種以上の前記検出プローブは互いにストリンジェントな条件下でハイブリダイズせず、且つ、
前記捕捉プローブを2種以上備える場合に、2種以上の前記捕捉プローブは互いにストリンジェントな条件下でハイブリダイズしない、哺乳動物の核酸検出キット。
(7) (6)に記載の哺乳動物の核酸検出キットを用いる、哺乳動物の複数の核酸を同時に検出する方法であって、
2種以上の前記捕捉プローブを哺乳動物の細胞又は組織と接触させることと、
洗浄によりハイブリダイズしていない前記捕捉プローブを除去した後、2種以上の前記検出プローブを哺乳動物の細胞又は組織と接触させることと、
洗浄によりハイブリダイズしていない前記検出プローブを除去した後、前記検出プローブを検出することと、
を含む、方法。
本実施形態のプローブは、哺乳動物の核酸とストリンジェントな条件下でハイブリダイズしない塩基配列からなり、配列番号1~673のいずれかに表される塩基配列を含む配列からなる。
本実施形態のプローブを構成する核酸は、DNAであってもよく、RNAであってもよい。また、本実施形態のプローブは、天然核酸からなるものに限定されず、BNA、エチレン-架橋化核酸(ENA)、ペプチド核酸(PNA)、グリコール核酸(GNA)、トレオース核酸(TNA)等の人工核酸を含んでもよい。
「リンカー」とは、2つの物質を連結する連結部分、又は2つの物質を連結するために用いられる分子を意味する。
本実施形態のプローブセットは、2種以上の、上述したプローブを備え、2種以上の前記プローブは互いにストリンジェントな条件下でハイブリダイズしない。
本実施形態の哺乳動物の核酸検出キット(以下、単に「本実施形態の核酸検出キット」と称する場合がある)は、検出プローブを1種以上と、捕捉プローブを1種以上と、を備える。
標識物質としては、上記「プローブ」において例示されたものが挙げられるが、中でも、蛍光標識(蛍光色素)が好ましい。
捕捉プローブにおいて、配列Aは、検出プローブの少なくとも一部と相補的な配列からなる。捕捉プローブは、配列Aを有することで検出プローブとストリンジェントな条件下でハイブリダイズして、標的核酸を検出することができる。
本実施形態の核酸検出キットは、上記検出プローブ及び上記捕捉プローブに加えて、他の要素を含んでいてもよい。他の要素としては、例えば、標識物質の検出試薬、試料調製試薬、希釈液、バッファー類(洗浄バッファー等)、使用説明書等が挙げられる。
2種以上の前記捕捉プローブを哺乳動物の細胞又は組織と接触させることと、
洗浄によりハイブリダイズしていない前記捕捉プローブを除去した後、2種以上の前記検出プローブを哺乳動物の細胞又は組織と接触させることと、
洗浄によりハイブリダイズしていない前記検出プローブを除去した後、前記検出プローブを検出することと、
を含む。
よって、本実施形態の哺乳動物の複数の核酸を同時に検出する方法によれば、哺乳動物の各種核酸を同時に多数検出することができる。
(プローブの作製)
発明者は、独自のアルゴリズムで設計したランダムな塩基配列からなるプローブライブラリを作製した。次いで、作製したプローブライブラリの各プローブの塩基配列について、ヒト及びマウスの全ゲノム配列との配列同一性をGenomic+transcript databasesを用いたWeb版BLAST(ヒト、マウス)、及び、Refseq transcript dataをindexに用いたBowtie2(ヒト、マウス、ゼブラフィッシュ、アフリカツメガエル、及びラット)により解析し、ヒト、マウス、ゼブラフィッシュ、アフリカツメガエル、及びラットの全ゲノム配列に存在しない塩基配列からなるプローブをスクリーニングした。
これらプローブのうち、配列番号6、22、31、42、43、54、61、71、86~88、91、109、114、118、125、128、134、140、141、146、149、151、157、167、201、213、214、218、220、221、228、230、234、241、242、248、253、283、289、294、298、303、305、310、327、349、363、365、375、378、385、394、400、406、412、416、418、420、421、430、431、439、475、501、523、532、548、557、563、585、589、593、608、620、631、642、及び646に表される塩基配列からなる、78種類のプローブはヒト及びマウスに加えて、ゼブラフィッシュ、アフリカツメガエル、及びラットの全ゲノム配列にも存在しないプローブであった。
(3種のプローブを用いたsmFISH法によるマウスES細胞内のmRNAの可視化試験)
次いで、上記実施例1で得られたプローブの内、以下の表1に示す3種類のプローブを検出プローブとして用いて、マウスES細胞内のmRNAの可視化試験を行った。蛍光物質として、ReadOut-12にはAlexa647を、ReadOut-85にはCy3Bを、ReadOut-170にはAlexa488を、それぞれ結合させたものを準備した。
Claims (7)
- 哺乳動物の核酸とストリンジェントな条件下でハイブリダイズしない塩基配列からなり、
配列番号1~673のいずれかに表される塩基配列を含む配列からなる、プローブ。 - 前記哺乳動物がヒト及びマウスからなる群より選ばれる1種以上の動物である、請求項1に記載のプローブ。
- 前記哺乳動物が、ヒト、マウス、ゼブラフィッシュ、アフリカツメガエル、及びラットからなる群より選ばれる1種以上の動物であって、
配列番号6、22、31、42、43、54、61、71、86~88、91、109、114、118、125、128、134、140、141、146、149、151、157、167、201、213、214、218、220、221、228、230、234、241、242、248、253、283、289、294、298、303、305、310、327、349、363、365、375、378、385、394、400、406、412、416、418、420、421、430、431、439、475、501、523、532、548、557、563、585、589、593、608、620、631、642、646のいずれかに表される塩基配列を含む配列からなる、請求項1又は2に記載のプローブ。 - 標識物質を更に有する、請求項1又は2に記載のプローブ。
- 2種以上の、請求項1又は2に記載のプローブを備え、
2種以上の前記プローブは互いにストリンジェントな条件下でハイブリダイズしない、プローブセット。 - 請求項4に記載のプローブからなる検出プローブを1種以上と、
前記検出プローブの少なくとも一部と相補的な配列Aと、哺乳動物の標的核酸の少なくとも一部と相補的な配列Bと、を有する捕捉プローブを1種以上と、
を備え、
前記検出プローブを2種以上備える場合に、2種以上の前記検出プローブは互いにストリンジェントな条件下でハイブリダイズせず、且つ、
前記捕捉プローブを2種以上備える場合に、2種以上の前記捕捉プローブは互いにストリンジェントな条件下でハイブリダイズしない、哺乳動物の核酸検出キット。 - 請求項6に記載の哺乳動物の核酸検出キットを用いる、哺乳動物の複数の核酸を同時に検出する方法であって、
2種以上の前記捕捉プローブを哺乳動物の細胞又は組織と接触させることと、
洗浄によりハイブリダイズしていない前記捕捉プローブを除去した後、2種以上の前記検出プローブを哺乳動物の細胞又は組織と接触させることと、
洗浄によりハイブリダイズしていない前記検出プローブを除去した後、前記検出プローブを検出することと、
を含む、方法。
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