WO2006028162A1 - シグナルプローブポリマーの形成方法 - Google Patents
シグナルプローブポリマーの形成方法 Download PDFInfo
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- WO2006028162A1 WO2006028162A1 PCT/JP2005/016497 JP2005016497W WO2006028162A1 WO 2006028162 A1 WO2006028162 A1 WO 2006028162A1 JP 2005016497 W JP2005016497 W JP 2005016497W WO 2006028162 A1 WO2006028162 A1 WO 2006028162A1
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- probes
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/531—Production of immunochemical test materials
- G01N33/532—Production of labelled immunochemicals
-
- 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
- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
- C12N15/10—Processes for the isolation, preparation or purification of DNA or RNA
-
- 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
- C12Q1/6816—Hybridisation assays characterised by the detection means
- C12Q1/682—Signal amplification
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T436/00—Chemistry: analytical and immunological testing
- Y10T436/14—Heterocyclic carbon compound [i.e., O, S, N, Se, Te, as only ring hetero atom]
- Y10T436/142222—Hetero-O [e.g., ascorbic acid, etc.]
- Y10T436/143333—Saccharide [e.g., DNA, etc.]
Definitions
- the present invention relates to a method of sequentially reacting a plurality of types of oligonucleotides having mutually complementary base sequence regions to form an assembly (polymer) of probes, and detecting a test gene in a sample
- the present invention relates to a method for forming a signal probe polymer that can be used in the present invention, a polymer formed by the method, and a method for measuring a test gene.
- Non-patent Documents 1 and 2 As a method for detecting a trace amount of a gene in a sample, there is a Polymerase chain reaction method in which a gene is amplified using a nucleic acid synthase, and many improved gene detection methods have been reported. In addition, several methods have been reported for detecting genes by hybridizing oligonucleotides branched from single-stranded DNA (Non-patent Documents 1 and 2).
- Patent Documents 1 to 4 This method is a method in which a plurality of types of oligonucleotides (probes and! /, U) having mutually complementary base sequence regions are self-assembled to form an assembly (polymer) of the probes. Is applied to the detection of a test gene in a sample.
- the probe is used to bind the probe to the test gene by making one portion of the complementary base sequence region of the probe to be used a complementary base sequence to the test gene in the sample.
- This is a method for effectively detecting a test gene by forming a phenotype, which is referred to as a Noresa (PALSAR) method.
- PALSAR Noresa
- This pulsar method is roughly classified into three types depending on the type of probe used.
- the first type of probe is two oligonucleotides consisting of three complementary base sequence regions represented by the following chemical formula (1) and chemical formula (2) (referred to as probe 1 and probe 2), Regions X and X ', Y and Y, and ⁇ and Z' have complementary base sequences so that they can form complementary polymers and form a polymer represented by the following chemical formula (9).
- Yes Patent Documents 1 and 2, hereinafter referred to as Pulsar I).
- dimer probe 1 and dimer probe 2 there are two types of probes (referred to as dimer probe 1 and dimer probe 2) having complementary base sequence regions represented by the following chemical formula (3) and chemical formula (4).
- Regions ⁇ and A ': ⁇ and B', C and C ', D and D', ⁇ and E ', and F and F' hold complementary base sequences to form a complementary bond with each other to give the chemical formula (9 ) Can be formed (Patent Document 3, hereinafter referred to as Pulsar II).
- the third type of probe includes one dimer probe (referred to as dimer probe 3) represented by the following chemical formula (6) and two oligonucleotides (referred to as cross-linking probes) represented by the following chemical formula (7).
- regions A and A, B and B, C and C, D and D, and F and F hold complementary base sequences to form a complementary bond to each other in the chemical formula (10).
- the polymers shown can be formed (Patent Document 4, hereinafter referred to as Pulsar III).
- An example of a method for detecting a test gene in a sample using the pulsar method is, for example, when two types of probes are used, the sample is captured by reacting the sample with a capture oligonucleotide immobilized on a support. . At this time, the capture oligonucleotide has a base sequence region complementary to the test gene. Next, the base sequence of the gene (not the portion bound to the capture oligonucleotide) and one probe having a complementary base sequence region as one region are reacted to bind to the gene. Next, both genes having complementary binding ability are added to form a polymer, and the amount of the polymer is quantified to measure the gene.
- Patent Document 1 Patent No. 3,267,576
- Patent Document 2 International Publication No.01Z75157 Specification
- Patent Document 3 International Publication No. 02Z31192 Specification
- Patent Document 4 Japanese Unexamined Patent Application Publication No. 2002-355081
- Non-patent literature l Shchepinov et.al, Nuc. Acids Res. 1997, 25, 4447-4454
- Non-Patent Document 2 Stears et. Al, Physiol. Genomics, 2000, 3: 93-99 Disclosure of the invention
- An object of the present invention is to solve the above-mentioned problems of the pulsar method and form a polymer only on a test gene by controlling the formation of the polymer in the step of forming an assembly (polymer) of probes. It is to develop a technique to improve sensitivity and quantitativeness.
- the present invention relates to a method for forming a signal probe polymer capable of controlling the formation of a polymer and suppressing a non-specific reaction, a polymer formed by the method, and a test gene having excellent detection sensitivity and quantitativeness. It aims at providing the measuring method of. Means for solving the problem
- a polymer is formed by reacting a plurality of types of oligonucleotides (referred to as probes) having complementary base sequence regions and complementary binding capabilities to each other.
- the method is characterized in that after immobilizing at least one of the probes to a test gene, the plurality of types of probes are reacted one by one in order to form a polymer.
- the method for immobilizing the probe to the test gene is not particularly limited as long as one of the plurality of types of probes used for polymer formation and the test gene are directly or indirectly bound.
- the signal probe polymer refers to the assembly (polymer) formed by a plurality of types of probes, wherein the plurality of types of probes have three complementary base sequence regions X, Y, and Z force.
- a probe 1 having the structure of the following chemical formula (1) and a probe 2 having the structure of the following chemical formula (2) consisting of three complementary base sequence regions X ′, Y ′ and Z ′, It is preferable to react the probes 2 one by one in order to form a polymer.
- the plural types of probes are a dimer probe 1 having a structure of the following chemical formula (3) and a dimer probe 2 having a structure of the following chemical formula (4) or the following chemical formula (5). It is preferable to react the dimer probes 2 one by one in order to form a polymer.
- the plural types of probes are a dimer probe 3 having a structure of the following chemical formula (6) and two cross-linking probes having a structure of the following chemical formula (7) or the following chemical formula (8), the dimer probe It is preferable to form a polymer by sequentially reacting 3 and the cross-linking probe one by one.
- a and A ′, B and B ′, C and C ′, D and D ′, and F and F ′ each have complementary base sequences.
- the probe used for the polymer formation is labeled with a labeling substance.
- the labeling substance is a radioisotope, piotin, digoxigenin, fluorescence. More preferably, it is a substance, a luminescent substance or a pigment.
- the base sequence is the same as a part or all of one of the plurality of types of probes used for the polymer formation.
- an immobilization probe having a base sequence complementary to the test gene is immobilized on the test gene, and then the plurality of types of probes are reacted with the immobilized probe one by one in order. It is preferable to form.
- the plurality of types of probes are the probe 1 and the probe 2, and the fixation probe is the same base sequence as part or all of the probe 1 and a base sequence complementary to the test gene. It is preferable to have.
- the plurality of types of probes are the dimer probe 1 and the dimer probe 2, and the immobilization probe has the same base sequence and test gene as part or all of the dimer probe 1 or 2. It preferably has a complementary base sequence.
- the plurality of types of probes are the dimer probe 3 and the cross-linking probe, and the immobilization probe is complementary to the dimer probe 3 or a part or all of the cross-linking probe and the same base sequence and test gene. It preferably has a base sequence.
- the polymer of the present invention is characterized by being formed by the method for forming a signal probe polymer of the present invention.
- test gene measurement method of the present invention is characterized in that a test gene is measured by forming a polymer using the signal probe polymer formation method of the present invention and measuring the amount of the polymer formed. .
- the polymer formation and detection sensitivity are controlled by sequentially reacting the probes one by one.
- non-specific reactions can be suppressed to improve quantitativeness and reproducibility.
- Fig. 1 is a schematic diagram of a probe immobilized on a test gene.
- FIG. 2 is a schematic explanatory view showing an example of a method for forming a signal probe polymer of the present invention.
- FIG. 3 is a graph showing the results of Example 1.
- FIG. 4 is a schematic explanatory diagram showing two sets of dimers ⁇ and 13 used in Example 2.
- FIG. 5 is a schematic explanatory view showing a first reaction in the signal amplification reaction step of Example 2.
- FIG. 6 is a schematic explanatory diagram showing a second reaction in the signal amplification reaction step of Example 2.
- FIG. 7 is a schematic explanatory view showing a third reaction in the signal amplification reaction step of Example 2.
- FIG. 8 is a graph showing the results of Example 2.
- FIG. 9 is a schematic explanatory diagram showing one set of dimer ⁇ and one set of cross-linking probes used in Example 3.
- FIG. 10 is a schematic explanatory view showing a first reaction in the signal amplification reaction step of Example 3.
- FIG. 11 is a schematic explanatory diagram showing a second reaction in the signal amplification reaction step of Example 3.
- FIG. 12 is a schematic explanatory diagram showing a third reaction in the signal amplification reaction step of Example 3.
- FIG. 13 is a schematic explanatory diagram showing a fourth reaction in the signal amplification reaction step of Example 3.
- FIG. 14 is a graph showing the results of Example 3.
- the main purpose of the pulsar method is to measure a test gene in a sample.
- immobilized probe means a state in which one of the probes used is directly or indirectly bound to a test gene to be measured.
- the method for immobilizing the probe to the test gene is not particularly limited, but the base sequence complementary to the test gene and the same base sequence (or complementary base sequence) as part or all of one probe used for polymer formation It is preferable that the probe to be used for polymer formation is bound to the test gene via the immobilization probe using the immobilization probe, which is a probe having a structure.
- the site of the probe used for polymer formation having the same base sequence as that of the immobilization probe is not particularly limited, but it is preferable to select one or more regions in the entire region of the polymer formation probe. Also suitable crosslinking agents can be used.
- the immobilization probe can be designed such that a part of one of plural types of probes used for polymer formation has a base sequence complementary to the test gene, and the probe can be used as an immobilization probe. .
- a probe (assist probe) having both a base sequence complementary to the test gene and a base sequence complementary to the probe used for polymer formation may be used.
- the assist probe has the advantage that a plurality of genes can be detected at the same time using the same set of probes by preparing a plurality of assist probes with different parts complementary to the test gene. .
- FIG. 1 is a schematic explanatory diagram showing an example of a method for immobilizing a probe to a test gene using an immobilization probe.
- Test gene 10 (i) Test gene 10, (ii) capture oligonucleotide 12: an oligonucleotide complementary to a region on the test gene, preferably 15 bases or more, more preferably 20 bases or more,
- Immobilization probe 14 A probe having the same base sequence as the region on the test gene and the same base sequence as the first probe used for polymer formation, and the region complementary to the test gene is ( Unlike the region of ii), preferably the region adjacent to the region of (ii), preferably 15 bases or more, more preferably 20 bases or more.
- test gene 10 is bridged and (i i) the capture oligonucleotide 12 and (iii) the immobilization probe 14 are combined with each other.
- FIG. 1 shows a base sequence region T complementary to the test gene represented by the following formula (11) as an immobilization probe in a method using a pulsar I probe described later.
- the probe for immobilization is not limited to this.
- the probe used for immobilization of the probe used for polymer formation and the test gene may be used in combination of two or more, not just one.
- the first immobilization probe having the structure of the following formula (12) as in Examples 2 and 3 described later and the second immobilization probe having the structure of the following formula (13) are used. Can do.
- T is a region having a base sequence complementary to the test gene
- a 'and F are regions having the same base sequence as one region of the probe used for polymer formation, and G and G' are complementary base sequences.
- the operation can be performed simply by binding the capture oligonucleotide to a solid phase and immobilizing it, preferably by immobilizing it on a support 16 such as a bead.
- No. 1 and (iii) may be hybridized at the same time, and (i) and (ii) may be hybridized first and then (iii) may be hybridized. It is also allowed to hybridize (ii) after nodding. When (ii) is solid-phased, it is preferable to first (i) and (iii) and then (ii) to neutralize. In some cases, after hybridizing the three kinds of oligonucleotides, (ii) the capture oligonucleotide and (m) the immobilization probe are separately bound, preferably by a ligation reaction.
- the ability to use a plurality of types of probes for polymer formation in (2) is free to select which of the plurality of types of probes to be used for the initial immobilization of the test gene. It is not limited.
- a probe having the same base sequence as the immobilized probe is referred to as a first probe, and a probe having a base sequence region complementary to the first probe is referred to as a second probe.
- the material of the support for measuring the test gene is glass, plastic (for example, polystyrene, polyamide, polyethylene, polypropylene, etc.), metal, etc., and the shape of the support is cup type, flat plate, particle There is no particular limitation.
- a sample is a sample for measuring the presence or absence of a test gene, and means biological fluids such as blood, serum, and cerebrospinal fluid, biological tissues, microorganisms, cultures, and extracts thereof.
- the second probe is bound to the immobilized probe (having the same base sequence as the first probe), and the first probe and the second probe are sequentially reacted to form a polymer.
- the first probe and the second probe for example, the following (1) Pulsar I probe, (2) Pulsar II probe, and (3) Panoresa III probe are used.
- (1) .Pulsar I probe The nucleotides represented by the following chemical formula (1) and chemical formula (2) are used as the first probe and the second probe.
- X and X ′, Y and Y ′, and Z and Z ′ each have complementary base sequences, and the arrows indicate the 5 ′ to 3 ′ direction of nucleotides.
- the dimer probe represented by the following chemical formula (3) and chemical formula (4) is used as the first probe and the second probe.
- Each dimer probe is prepared by subjecting the nucleotides of chemical formula (14) and chemical formula (15) to hybridization.
- a and A ′, B and B ′, C and C ′, D and D ′, E and E ′, and F and F ′ have complementary base sequences, respectively, and the arrow indicates the 5 ′ force of the nucleotide. Means 3 'direction.
- dimer probe a dimer probe having the structure of the following chemical formula (5) may be used instead of the dimer probe having the structure of the chemical formula (4).
- a dimer probe represented by the following chemical formula (6) and a cross-linking probe that is two oligonucleotides represented by the following chemical formula (7) are used as the first probe and the second probe.
- the dimer probe is prepared by applying and nucleotideizing the nucleotide of the chemical formula (14). Where A and A, B and B ', C and C', D and D 'and F and F' have complementary base sequences to each other, and the arrows mean the 5 'to 3' direction of the nucleotide. To do.
- nucleotides having the structure of the following chemical formula (8) may be used instead of the nucleotide having the structure of the chemical formula (7).
- Patent Document 2 it is possible to form a polymer at several or five positions in the complementary base sequence region (Patent Document 2), and two types of dimer probes are used. If the positional relationship of the sequence regions is devised, a wider variety of dimer probes can be used (Patent Document 3). As described above, in addition to the probes described above, other types of probes can be used by devising the arrangement of the complementary base sequence region, so that a self-assembled polymer can be formed. Are included in the present invention.
- each complementary base sequence region of the probe is at least 5 bases, preferably at least 8 bases, more preferably 10 bases to 100 bases, and further preferably 15-30 bases. It is a base. In addition, it is desirable that the length of the complementary base sequence region in each probe is the same.
- FIG. 2 shows an example of a method for forming the signal probe polymer of the present invention.
- Fig. 2 shows an example using a pulser I probe (first probe 22, second probe 24), and 20 shows a probe for immobilization immobilized on a support with a capture oligonucleotide and a test gene.
- FIG. 2 shows that a capture oligonucleotide bound to piotin 30 and a support bound to avidin 32 are used, and the capture oligonucleotide is bound by binding of piotin 30 and avidin 32.
- An example is shown in which the nucleotide is fixed to a support.
- the second probe is then reacted. And wash.
- the polymer can be formed by sequentially repeating the first probe and the second probe in the following order. For example, as shown in FIG. 2, a first probe reaction vessel 26 containing the first probe 22, a washing vessel, and a second probe reaction vessel 28 containing the second probe 24 are prepared and used for the test gene and the immobilization reagent.
- the method is not particularly limited. According to the method of the present invention, each probe reaction solution can be reused. Further, depending on the method, the cleaning operation can be omitted.
- the reaction solution for carrying out the hybridization reaction is an almost neutral buffer solution containing an appropriate sodium salt, a blocking agent, and a high lysis reaction. It may contain additives to promote it.
- these reagents those described in the book of Sambrook et al. (Molecular cloning 3rd ed, 2001) can be used.
- the temperature at which the polymer is formed is not particularly limited as long as it is a temperature at which each constituent probe can hybridize, and is usually in the range of 40 to 90 ° C, preferably in the range of 45 to 65 ° C. Can be implemented.
- the amount of polymer formed can be measured by fluorescence by binding an intercalating dye such as ethidium bumbamide, oligo green or SYBR to the polymer.
- the probe used may be combined with a labeling substance such as a light emitting substance such as a radioactive isotope or an atheridine ester, a coloring substance, a fluorescent substance, an enzyme, piotin, digoxigenin, or the like.
- the labeling substance to be bound is not particularly limited as long as it does not affect the formation of the polymer.
- the measurement is a method corresponding to the labeling substance, and if it is a radioactive isotope, the radioactivity is measured, In the case of a luminescent substance, the emitted light is measured by a colorimetric material, in the case of a colorimetric substance, by the colorimetric method, in the case of a fluorescent substance by the fluorescence, and in the case of an enzyme by the enzyme activity, respectively.
- a suspension of Staphylococcus aureus cultured in tryptic soger for 18 hours in physiological saline was used as a culture broth. This was diluted with physiological saline to a predetermined number of bacteria, and lysed according to the method of Birnboim et al. (H.C. Birnboim et al Nuc Acids Res 1979 7 1513-15 23) was used in the following examples.
- a predetermined number of bacteria was calculated from the number of viable bacteria obtained by preparing a dilution series of a culture stock solution and culturing with tryptic soger.
- "(1)" was shown as a control when the same reaction was performed using physiological saline instead of the diluted bacterial solution.
- a first hybridization solution was prepared so as to have the following composition.
- capture oligonucleotide 1 and immobilization probe 1 were designed as follows to capture Staphylococcus aureus 23s rRNA (based on GENBANK accession number NC 003923.1 GI: 21281729).
- Nucleotide sequence of capture oligonucleotide 1 (3 'terminal thiotin label) (SEQ ID NO: 1)
- Probe 1 having the following base sequence and digoxigenin as a pair of probes for Norther I were prepared, respectively.
- Probe 1 base sequence (SEQ ID NO: 3)
- Probe 2 base sequence (5 'terminal digoxigenin label) (SEQ ID NO: 4)
- Hybridization solution A and neutralization solution B were prepared to have the following compositions.
- Probe X (SEQ ID NO: 4) containing lOpmolZ ⁇ L, 6 X SSC, 0.3% sodium dodecyl sulfate, 5% polyethylene glycol # 20000 solution.
- Probe 1 (SEQ ID NO: 3) containing lOpmolZ ⁇ L, 6 X SSC, 0.3% sodium dodecyl sulfate, 5% polyethylene glycol # 20000 solution.
- the hybridization solution A containing the probe 2 was placed in a test tube containing the magnetic beads at 200 / z L and heated at 45 ° C for 5 minutes (see FIG. 2 (b)). ;)). Thereafter, only the magnetic beads were collected with a magnet, and the hybridization solution A was recovered from the test tube. After that, 200 L of the hybridization solution B containing probe-1 in a test tube was heated at 45 ° C. for 5 minutes (see FIG. 2 (c)). The magnetic beads were collected and the hybridization solution B was collected in the test tube (first time). In this example, the set of the reaction with the hybridization solution A and the reaction with the hybridization solution B was counted as one cycle of signal amplification.
- the collected hybridization solution A was added to the test tube containing the magnetic beads and heated at 45 ° C for 5 minutes (see (d) of Fig. 2). Thereafter, the magnetic beads were collected and the hybridization solution A was collected from the test tube. Thereafter, the collected hybridization solution B was put in a test tube and heated at 45 ° C. for 5 minutes (see (e) of FIG. 2). The magnetic beads were collected and the hybridization solution B was recovered from the test tube (second time).
- the base sequence of the primer for cDNA synthesis is as follows.
- the master mixture was added to 2 ⁇ L of the prepared cDN A solution, 0.2 L of 5U / ⁇ LAmpliTaq (manufactured by Applied Biosystems) and 0.2 ⁇ L of sterilized distilled water to a total volume of 50 ⁇ L. Amplification was performed under the cycle conditions shown in Table 1 below.
- the target DNA amplified by the above PCR is about 270 base pairs.
- the ciMaster mixture ⁇ ma Maxim Biotech's Virus, Hepatitis type virus 5 UTR, Primer set kit (Cat.No .: SP-10275) is included in the kit according to the instruction manual attached to the kit. This refers to the one prepared by adding 250 ⁇ L of pre-mixed primers to 750 ⁇ L of Optimized PCR Buf fer.
- the target clone obtained by the above-mentioned cloning is treated with ampicillin at 100 ⁇ gZmL. After culturing at 37 ° C. for 12 hours with 5 mL of 2 ⁇ YT medium containing, plasmid clones were obtained using QIAprep Spin Miniprep Kit (Qiagen). Furthermore, the sequence of the insert was confirmed with DNA Sequencer 3130 manufactured by Applied Biosystems. The sequence of HCV5'UTR whose sequence was confirmed is shown below.
- TE 10 mM Tris-HCl, ImM EDTA, pH 8.0
- lO ⁇ LmM LiCU 300 L of ethanol 100 / z L was prepared and placed at 80 ° C for 30 minutes.
- the cRNA was collected as a precipitate by centrifugation at 4 ° C, 15000 rpm for 10 minutes.
- the precipitate was washed with 500 / z L of 70% ethanol, dried, and dissolved in 10 / z L of TE (pH 8.0). The concentration was determined from the absorbance at 260 nm.
- Probes having the following base sequences were prepared for preparation of two sets of dimers (X and 13 [reference numeral 40 in FIG. 4 (a) and reference numeral 41 in FIG. 4 (b)] for Pulsar II, respectively.
- Base sequence (SEQ ID NO: 7) of probe 1 for dimer formation (symbol 42 in Fig. 4) (5, terminal digoxigenin labeling) 5'- DIG- A region (CAGTACAAGCACGATCTCTG) ⁇ B region (ATTTGCCAGGACTGC GTTTC) ⁇ C region (GACTGGTCTAGTCTGAAC) -3 '
- Nucleotide sequence of probe 4 for dimer formation (symbol 48 in FIG. 4) (SEQ ID NO: 10) (5 ′ end digoxigenin labeling)
- a [4 X SSC, 0.1% sodium dodecyl sodium sulfate] solution containing 0.1 ⁇ L of the dimer a solution per 200 ⁇ L of the solution was prepared and used as an hybridization solution A. Also, a hybridization solution was prepared in the same manner except that the dimer ⁇ solution was used instead of the dimer ⁇ solution.
- the capture oligonucleotide 12 was designed as follows so as to capture the prepared cRNA as the target gene. In order to fix the dimer string to the target gene Further, the following fixing rod probes 2 and 3 were prepared.
- Nucleotide sequence of capture oligonucleotide 2 (symbol 50 in Fig. 5) (SEQ ID NO: 1 1) (5 'terminal piotin label)
- Nucleotide sequence of fixed probe 2 (symbol 52 in FIG. 5) (SEQ ID NO: 12)
- Base sequence of immobilization probe 3 (symbol 54 in FIG. 5) (SEQ ID NO: 13)
- a first hybridization solution was prepared so as to have the following composition.
- the avidinized magnetic beads (DYNAL, Dynabeads M-280 Streptoavidin, 6-7 X 10 6 beads) were added to the test tube after the calorie temperature, and stirred at room temperature for 30 minutes. RKVSD manufactured by Appropriate Technical Resources was used for stirring. The magnetic beads were collected with a magnet, and the solution after the reaction was excluded.
- FIG. 6 is a schematic explanatory diagram of this second reaction.
- reference numeral 51 denotes a magnetic bead as a support. That Thereafter, only the magnetic beads were collected with a magnet, and the hybridization solution A was recovered from the test tube. Thereafter, 200 ⁇ L of the hybridization solution containing dimer ⁇ was added to a test tube and heated at 45 ° C. for 10 minutes (third reaction).
- FIG. 7 is a schematic explanatory diagram of this third reaction. The magnetic beads were collected and the hybridization solution B was recovered from the test tube (first time). In this example, the set of the reaction with the hybridization solution A and the reaction with the hybridization solution B was defined as one cycle of signal amplification.
- the collected hybridization solution A was added to the test tube containing the magnetic beads and heated at 45 ° C for 10 minutes. The magnetic beads were then collected and the hybridization solution A was recovered from the test tube. Thereafter, the collected hybridization solution B was placed in a test tube and heated at 45 ° C. for 10 minutes. The magnetic beads were collected and the hybridization solution B was collected in the test tube (second time).
- magnetic beads were prepared only once and up to the second. Each magnetic bead was collected and finally washed twice with 200 L of wash solution A [50 mM Tris-HCl (pH 7.6), 0.3 M NaCl, 0.1% Triton X-100].
- a probe having the following base sequence was prepared for the preparation of a pair of dimers ⁇ [reference numeral 60 in FIG. 9 (a)] and a pair of cross-linked probes [FIG. 9 (b)] for Pulsar III.
- a [4 ⁇ SSC, 0.1% sodium dodecyl sulfate] solution containing 5 ⁇ L of the dimer y solution per 200 ⁇ L of the solution was prepared and used as an hybridization solution A. Further, a hybridization solution B was prepared so as to have the following composition.
- a solution having the following composition was used as the first hybridization solution.
- the capture oligonucleotide 2 and the immobilization probe 2 are the same as in Example 2.
- the base sequence of the immobilization probe 4 (symbol 70 in FIG. 10) is as follows. 5 -G, region (GCCTGACATTGGTTATCGCA) ⁇ C, region (GTTCTCAGACTAGACCA GTC) -3 '(SEQ ID NO: 18)
- Example 2 100 L of sterile distilled water containing cRNAlOng prepared in the same manner as in Example 2 was used as a sample. In a test tube, add 100 L of the first hybridization solution containing the sample, capture oligonucleotide 2 and immobilization probe 2 and 4, and heat at 45 ° C for 1 hour.
- First reaction 10 to 13 are schematic explanatory diagrams of the signal amplification reaction process of Example 3, and FIG. 10 is a schematic explanatory diagram of the first reaction.
- FIG. 11 is a schematic explanatory diagram of this second reaction. Thereafter, only the magnetic beads were collected with a magnet and the hybridization solution A was collected in a test tube. Thereafter, 200 ⁇ L of the hybridization solution B containing crosslinking probes 1 and 2 in a test tube was added and heated at 45 ° C. for 10 minutes (the third reaction).
- FIG. 12 is a schematic explanatory diagram of this third reaction. The magnetic beads were collected and High Pre-Dilution Solution B was collected from the test tube (first time). In this example, the set of the reaction with the hybridization solution A and the reaction with the hybridization solution B was defined as one cycle of signal amplification.
- FIG. 13 is a schematic explanatory diagram of this fourth reaction. Thereafter, the magnetic beads were collected and the hybridization solution A was recovered from the test tube. Thereafter, the collected hybridization solution B was added to a test tube and heated at 45 ° C. for 10 minutes. The magnetic beads were collected and the hybridization solution B was collected by the test tube force (second time).
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EP05778605A EP1793004B1 (en) | 2004-09-08 | 2005-09-08 | Method of forming signal probe polymer |
US11/659,660 US7867708B2 (en) | 2004-09-08 | 2005-09-08 | Method of forming signal probe-polymer |
JP2006535810A JPWO2006028162A1 (ja) | 2004-09-08 | 2005-09-08 | シグナルプローブポリマーの形成方法 |
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JP2008064475A (ja) * | 2006-09-04 | 2008-03-21 | Osaka Univ | 標的物質の高感度検出方法、検出用キットおよび検出装置 |
WO2009022682A1 (ja) | 2007-08-14 | 2009-02-19 | Eisai R & D Management Co., Ltd. | 標的物質の検出方法 |
WO2009022683A1 (ja) | 2007-08-14 | 2009-02-19 | Eisai R & D Management Co., Ltd. | 標的物質の検出方法 |
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US8450058B2 (en) | 2007-08-14 | 2013-05-28 | Eisai R&D Management Co., Ltd. | Method of detecting target substance |
JP5289314B2 (ja) * | 2007-08-14 | 2013-09-11 | エーザイ・アール・アンド・ディー・マネジメント株式会社 | 標的物質の検出方法 |
JP5289315B2 (ja) * | 2007-08-14 | 2013-09-11 | エーザイ・アール・アンド・ディー・マネジメント株式会社 | 標的物質の検出方法 |
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DE602005020319D1 (de) | 2010-05-12 |
EP1793004A4 (en) | 2008-01-23 |
ATE462802T1 (de) | 2010-04-15 |
JPWO2006028162A1 (ja) | 2008-05-08 |
EP1793004A1 (en) | 2007-06-06 |
US7867708B2 (en) | 2011-01-11 |
US20080199968A1 (en) | 2008-08-21 |
EP1793004B1 (en) | 2010-03-31 |
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