WO2001022089A1 - Sonde d'hybridation a reconnaissance automatique - Google Patents
Sonde d'hybridation a reconnaissance automatique Download PDFInfo
- Publication number
- WO2001022089A1 WO2001022089A1 PCT/JP2000/006524 JP0006524W WO0122089A1 WO 2001022089 A1 WO2001022089 A1 WO 2001022089A1 JP 0006524 W JP0006524 W JP 0006524W WO 0122089 A1 WO0122089 A1 WO 0122089A1
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- WIPO (PCT)
- Prior art keywords
- nucleic acid
- probe
- energy
- substance
- labeling substance
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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
- C12Q1/6816—Hybridisation assays characterised by the detection means
- C12Q1/6818—Hybridisation assays characterised by the detection means involving interaction of two or more labels, e.g. resonant energy transfer
Definitions
- the present invention relates to a self-recognizing probe used for nucleic acid detection, and more particularly, to a probe in which energy release (for example, fluorescence) from a labeling substance is controlled by an energy absorbing substance.
- energy release for example, fluorescence
- a method using a probe as a method for detecting a gene.
- a sample containing a nucleic acid to be detected is immobilized on a solid phase, and a nucleic acid to which a label complementary to the sample is introduced (hereinafter, a nucleic acid complementary to the nucleic acid to be detected is referred to as a probe) is hybridized.
- a probe a nucleic acid complementary to the nucleic acid to be detected.
- the presence or absence of the target nucleic acid in the sample is determined by detecting the labeled substance in the nucleic acid trapped in the solid phase after forming a double strand by washing the solid phase.
- the probe has an acridinium ester introduced therein, and when the probe forms a complementary chain, it is more resistant to hydrolysis by alcohol than when the probe does not form a complementary chain.
- hydrolysis is performed with alkali after hybridization, and the remaining acridinium ester that is not decomposed is detected by chemiluminescence.
- This method is excellent in that it does not require solid-liquid separation, and is widely used. However, it still requires treatment such as hydrolysis after hybridization, degrades acridinium ester at high temperature, and has only one-time chemiluminescence, which makes further application difficult.
- a typical method is to use two probes in which a label has been introduced near the 5 'end of one probe and another label has been introduced in the vicinity of the 3' end of the other probe.
- two types of labels can be accessed by hybridization only when a nucleic acid complementary to both probes is present, and the energy transfer that occurs between the two types of labels at that time is used.
- the fluorescence is quenched when the gene of interest is present, or the fluorescence of one label is absorbed by the other fluorescent substance to emit fluorescence. There is.
- TaqMan TM method Lik, KJ et. Al. PCR Methods Appl. 4, 357-362 (1995)
- Two fluorescent labels are introduced, and only when this oligonucleotide forms a complementary strand with a complementary sequence, it is degraded by the exonuclease activity of DNA polymerase in the 5 'to 3' direction.
- Still another method is the Molecular Beacon method (ramer F. R. et. Al. Nature Biotec hnology 49-53 (1988)).
- a fluorescent receptor and a donor are introduced into both ends of an oligonucleotide, and an extra sequence other than a sequence complementary to the target is added to both ends of the oligonucleotide.
- a hairpin is formed with extra sequences at both ends. That is, the two types of labels are located at a sufficiently close position due to the formation of the hair bin, and can cause energy transfer.
- this method utilizes the fact that the fluorescence of one fluorescent substance is absorbed by the other fluorescent substance when the target is not present, and such quenching does not occur when the target is present. .
- this oligonucleotide forms a double strand with another nucleic acid
- acridine intensifies in the double-stranded nucleic acid and transfers energy to fluorescein even when irradiated with light at 34 nm. It cannot be generated efficiently and therefore cannot detect the fluorescence from fluorescein.
- the fluorescent substance and the in-one-one-one-one-in-one were simultaneously introduced into the ends of the oligonucleotide.
- the second fluorescent substance is often excited to some extent by the light excited by the fluorescent substance, and thus the background is often high. In addition, it emits fluorescence when no complementary strand is present, and decreases in fluorescence when a complementary strand is present, so that it is not suitable for general diagnostic methods.
- An object of the present invention is to provide a probe for detecting a nucleic acid and a method for detecting a nucleic acid, which can perform gene detection in a short time and with high sensitivity by a simple operation that does not require a solid-liquid separation operation.
- Another object of the present invention is to provide a solid phase carrier for nucleic acid detection capable of detecting a target nucleic acid without labeling a sample.
- the probe according to the present invention is a probe consisting of a nucleic acid carrying a labeling substance that releases energy and an energy absorbing substance that can absorb the energy released from the labeling substance.
- the probe is characterized in that the energy transfer from the labeling substance to the energy absorbing substance is prevented by the hybridization.
- the method for detecting a nucleic acid according to the present invention comprises contacting the probe with a nucleic acid sample, and then measuring the energy released from the labeling substance.
- the solid phase carrier for nucleic acid detection according to the present invention has the probe immobilized thereon.
- FIG. 1 is a schematic diagram of a probe according to the present invention.
- Single Stranded indicates that the probe is not hybridized with the target nucleic acid.
- Double Stranded indicates that the probe has hybridized with the target nucleic acid.
- F indicates a labeling substance such as fluorescein
- P indicates a light absorbing substance such as pyrene.
- FIG. 2 is a diagram showing a specific structure of a modified portion of an oligonucleotide (EFN1-1F, EFN2-F) in which an amino group and fluorescein are immobilized.
- EFN 3— F and E FN4-F have the same structure as E FN 1-F and EFN 2-F except for the base (Fig. 3 shows oligonucleotides with immobilized pyrene and fluorescein (EFN1-FP and EFN2-FP) It is a figure which showed the specific structure of the modification part of EFN3-FP, EFN4-FP is the same structure as EFN1-FP and EFN2-FP except a base.
- the “labeling substance” may be any substance that becomes an excited state by receiving photochemically or chemically energy and emits energy when returning from the excited state to the original state.
- photochemically excited substances include fluorescent substances such as fluorescein and tetramethylrhodamine.
- photochemically excited substances include delayed fluorescent substances such as a lanthanide complex (eg, a palladium complex) (Hemmila, I. et. Al. Drug Discovery Today 2, 373-381 ( 1997)).
- Chemically excited substances include chemiluminescent substances such as luminol.
- energy includes light energy, heat energy, electromagnetic energy, and chemical energy.
- the term "energy absorbing substance” refers to a substance whose absorption of energy is prevented by hybridization between a probe and a complementary nucleic acid, and is preferably a light energy absorbing substance.
- the light energy absorbing substance include a substance that is capable of absorbing a double-stranded nucleic acid (intercalation) and a substance that specifically binds to a double-stranded nucleic acid.
- Light absorbing intercalates include acridine, anthracene, pyrene and their derivatives.
- Examples of the light-absorbing substance that selectively binds to the double-stranded nucleic acid include ethidium bromide and Hoechst33258.
- These energy-absorbing substances only need to have the ability to absorb the energy released from the labeling substance, and are capable of releasing the absorbed energy as light, for example, fluorescence, or as heat. May be.
- the combination of the labeling substance and the energy-absorbing substance used in the present invention is a labeling substance.
- a combination of fluorescein and birene, fluorescein and acridine, fluorescein and coumarin, tetramethyl mono-damine and pyrene can be mentioned.
- the labeling substance and the energy-absorbing substance are modified for nucleic acid synthesis, they can be directly introduced into a specific site of the oligonucleotide using an automatic synthesizer.
- those functional groups are introduced during the oligonucleotide synthesis using a nucleic acid synthesis reagent that introduces an amino group, a thiol group, etc., and then a functional group that reacts with the functional group is introduced.
- Labeling can be performed using the introduced label. Labels can be introduced using these reagents at the 5 'end or 3' end of the oligonucleotide, at the phosphate moiety, or at the base or sugar moiety at any position. . It can also be introduced between the diester phosphate linkages (Goodchild, J. Bioconhugate Chemistry 1, 165-187 (1990)).
- the method of adjusting the positional relationship between the two types of labels can be achieved by changing the introduced portion of the oligonucleotide, or by changing the structure or length of the spacer connecting the nucleic acid and the label. Can also be adjusted.
- the positional relationship of the label must be such that energy transfer from the label to the energy-absorbing substance can take place. Or, it must not be in a position that prevents binding.
- quenching of fluorescence by a nucleic acid base may be observed depending on the base sequence of the oligonucleotide. Needs to take that into account. However, this quenching phenomenon may be eliminated by forming a double strand.
- the probe according to the present invention can be composed of a nucleic acid having 4 bases or more, preferably 8 bases or more.
- nucleic acid includes not only DNA, RNA but also modified nucleic acids or those that form double strands with nucleic acids such as PNA (peptide nucleic acids).
- PNA peptide nucleic acids
- the light-absorbing substance introduced into the probe for example, a light-absorbing substance that specifically binds to a light-absorbing intercalate or double-stranded nucleic acid Interacts with the double-stranded nucleic acid, causing no quenching of the labeling substance introduced into the probe (see Figure 1).
- the probe does not hybridize to the sample or incompletely hybridizes to the sample, the light that specifically binds to the light-absorbing inducer or double-stranded nucleic acid introduced into the probe is used.
- the absorbing substance does not interact with the double-stranded nucleic acid, and quenching of the labeling substance introduced into the probe occurs (see FIG. 1).
- the presence of light emitted from the labeling substance indicates that the probe and the target nucleic acid have hybridized, and the absence of light emitted from the labeling substance indicates that the probe and the target nucleic acid have hybridized. Indicates that the target nucleic acid has not been hybridized.
- the probes according to the invention can also detect single salt tD mismatches. That is, even when the probe does not pair with the sample at one base, the structure of the double-stranded nucleic acid changes, and the energy-absorbing substance introduced into the probe, for example, a light-absorbing intercalator or two The light-absorbing substance that specifically binds to the strand nucleic acid does not interact with the double-stranded nucleic acid, and the quenching of the labeling substance introduced into the probe occurs.
- the energy release from the labeling substance is not prevented by the energy absorbing substance. Therefore, the complementary strand nucleic acid in the sample can be detected by bringing the probe into contact with the sample and measuring the energy release such as fluorescence from the labeling substance.
- the probe according to the present invention and the nucleic acid prepared from the sample are mixed in a solution containing an appropriate buffer solution, etc., and a hybridization operation is performed. By comparing with the above, it can be determined whether or not a sequence complementary to the probe exists in the sample.
- the method and conditions for hybridization may be in accordance with a general method (Keller, G.H. et al. DNA Probes Stockton Press (1993)). Detection after hybridization can be detected using a detection device corresponding to the label. For example, if the label is fluorescent, a fluorescence spectrophotometer can be used. However, if the number of specimens is large, it can be easily performed using a fluorescent microplate reader or the like. Further, as described later, in a hybridization with a probe fixed to a carrier such as a gene chip, the fluorescence on the carrier can be measured using a fluorescence scanner or the like.
- the sample nucleic acid may be either DNA or RNA, and may be extracted from any organism or may be in a crudely purified state.
- the gene may be amplified by a gene amplification method, for example, the PCR method, and then hybridized with the probe of the present invention.
- the temperature can be changed, many reaction vessels are provided, and the fluorescence
- a device that can measure pH ABSI PRISM TM 7700 Perkin-elmer, etc., it is also possible to perform hybridization and measurement continuously in one container.
- the probe of the present invention can be used not only for homogeneous hybridization in a solution but also in a state of being bound to a solid phase carrier.
- a method for preparing the probe of the present invention bound to a solid phase carrier a method of synthesizing an oligonucleotide on a solid phase used for detection and a method described in (Fodor, SPA et al. Science 251, 767-773 (1991)), There is a method of synthesizing an oligonucleotide into which an appropriate functional group is introduced, and then binding the oligonucleotide to a solid phase using the introduced functional group (Rasmussen, SR Anal. Biochem. 198, 138-142 (1991)).
- a microplate As the solid phase carrier, a microplate (Rasmussen, SR Anal. Biochem. 198, 138-142 (1991)) ⁇ slide glass (Fodor, SPA et al. Science 251, 767-773 (1991)) or There is an end of an optical fiber (Ferguson, JA Nature Biotechnolog 14, 1681-1684 (1996)).
- the solid phase carrier according to the present invention may be a gene chip.
- gene chip technology There are two main uses of gene chip technology, one for examining the expression level of RNA and the other for examining gene mutations (Lander, ES Nature Genetics supplement, 21, 3-4 (1999)).
- the probe of the present invention can be a powerful method in any case, but can be particularly effective in the former case.
- oligonucleotides, cDNA, etc. are immobilized on the chip (Duggan, DJ et. A. Nature Genetics supplement, 21, 10-14 (1999), Lipshutz, RJ Nature Genetics supp. lement, 21, 20-24 (1999)), it is necessary to label nucleic acids in a sample in order to detect hybridization.
- RNA is unstable, and the risk of degradation in various labeling reactions is extremely high.
- the probe of the present invention is immobilized on a chip, hybridization can be performed without performing labeling operation on mRNA extracted from a living body or the like. Can be detected. If such a method is used, gene expression analysis will be greatly simplified, and it will be possible to easily process a very large number of samples.
- Oligonucleotides were synthesized by the phosphoramidite method using an automatic nucleic acid synthesizer (DNA / NA synthesizer Model 392, PerkinElmer).
- the introduction of fluorescein was performed using fluorescein foam amidite (Glenlisach, Cat. No .: 10-1963).
- Pyrene was introduced by introducing an amino group using Unilink TM Amino Modifier (Clontech, Cat. No .: 5190-1), and then keeping it with 1-Dvrenebutanoic acid, succinimidyl ester, and selefuf. H. (Cat. No .: P-130).
- the unlabeled oligonucleotide was purchased from Amersham Pharmacia Biotech.
- Example 1 Synthesis of Oligonucleotide Introducing Fluorescein and Bilen
- the following oligonucleotides having an amino group and fluorescein introduced were synthesized using an automatic synthesizer.
- F indicates fluorescein.
- the specific structure of the modified moiety is as shown in FIG.
- the fluorescence spectrum of fluorescein was confirmed (excitation wavelength: 494 nm, maximum fluorescence wavelength: 517 nm).
- E FN 1 -F 5 'GCAACAGGC (NH 2 ) (F) CGACAACG (SEQ ID NO: 1)
- E FN 2 -F 5 'GCAACAGG (NH 2 ) C (F) CGACAACG (SEQ ID NO: 1)
- E FN 3 -F 5 'ACGC ACAAA (NH 2 ) (F) AC CAAGCA (SEQ ID NO: 2)
- EFN4-F 5 'ACGC AC AA (NH 2)
- Refining oligonucleotides (8 0 ig) in 1M NaHCOs (4 ⁇ L) pyrene active ester DM F solution (2 0 g / L, 20 // L), while handling H 2 0 (16 ⁇ L)
- the reaction was performed at 25 ° C for 14 hours. After the reaction, remove excess reagent by gel filtration (Sephdex G-50, 5 OmM TEAB buffer).
- oligonucleotides are shown below.
- P represents pyrene
- F represents fluorescein
- the structure of the modified moiety is as shown in FIG.
- the introduction of pyrene was confirmed by measuring the fluorescence spectrum (excitation wavelength: 341 nm, maximum fluorescence wavelength: 383 nm, 400 nm)
- E FN 2 -FP 5, GCAACAGG (P) C (F) CGACAACG (SEQ ID NO: 1)
- E FN 3 -FP 5 'ACGCACAAA (P) (F) AC CAAGCA (SEQ ID NO: 2)
- E FN4 -FP 5, ACGCACAA (P) A (F) AC C AAG CA (SEQ ID NO: 2)
- Example 2 Increase in fluorescence intensity by hybridization of fluorescein-pyrene-labeled oligonucleotides
- E C 1 5 'CGTTGTCGGCCTGTTGC (SEQ ID NO: 3)
- EC2 5 'TGCTTGGTTTTGTGCGT (SEQ ID NO: 4) Labeled oligonucleotide and unlabeled oligonucleotide were buffered as shown below (50 mM Tris-HCl pH 8.0, 5 mM EDTA, 250 mM Na The mixture was mixed with C 1, 50 ng / jcarrier DNA) to prepare a double-stranded solution and a control solution. The mixed solution was annealed from 94 ° C to 34 ° C for 5 hours.
- the fluorescence intensity may be increased by forming a double strand (No. 4 and No. 5). This is because the fluorescence of the fluorescein introduced into the oligonucleotide was released by the formation of a double-stranded structure that had been quenched by the interaction with the oligonucleotide. Such phenomena often depend on the sequence and are not seen in Nos. 7 to 12. On the other hand, in the case of introducing biylene, the fluorescence intensity increased only when the double strand was formed (Nos. 13 to 24, No. 4, No. 17, No. 21, No. 21). 24) This indicates that this probe increases the fluorescence intensity due to hybridization.
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Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU73207/00A AU780156B2 (en) | 1999-09-22 | 2000-09-22 | Hybridization self-recognition type probe |
EP00961205A EP1215498A4 (en) | 1999-09-22 | 2000-09-22 | HYBRIDIZING PROBE WITH AUTOMATIC RECOGNITION |
CA002385658A CA2385658A1 (en) | 1999-09-22 | 2000-09-22 | Hybridization self-recognition probe |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP26874599 | 1999-09-22 | ||
JP11/268745 | 1999-09-22 |
Publications (1)
Publication Number | Publication Date |
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WO2001022089A1 true WO2001022089A1 (fr) | 2001-03-29 |
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ID=17462758
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2000/006524 WO2001022089A1 (fr) | 1999-09-22 | 2000-09-22 | Sonde d'hybridation a reconnaissance automatique |
Country Status (4)
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EP (1) | EP1215498A4 (ja) |
AU (1) | AU780156B2 (ja) |
CA (1) | CA2385658A1 (ja) |
WO (1) | WO2001022089A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012147722A (ja) * | 2011-01-19 | 2012-08-09 | Toppan Printing Co Ltd | エネルギー移動を用いた蛍光物質による核酸検出法 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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EP1442142A4 (en) * | 2001-10-19 | 2006-11-15 | Proligo Llc | NUCLEIC ACID ESTERS AND METHOD FOR DETECTING AND QUANTIFYING NUCLEIC ACID ANALYSTS |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5998135A (en) * | 1989-02-24 | 1999-12-07 | Enzo Diagnostics, Inc. | Energy transfer hybridization assay using intercalators and lanthanide metals |
DE69132765T2 (de) * | 1990-12-24 | 2002-02-21 | Enzo Diagnostics, Inc. | Verfahren zum Nachweis eines Zielpolynukleotids in einer Probe unter Verwendung eines Reagenz, das den Hintergrund verringert, und eine dieses Reagenz enthaltende Zusammensetzung und Kit. |
US6077668A (en) * | 1993-04-15 | 2000-06-20 | University Of Rochester | Highly sensitive multimeric nucleic acid probes |
US5538848A (en) * | 1994-11-16 | 1996-07-23 | Applied Biosystems Division, Perkin-Elmer Corp. | Method for detecting nucleic acid amplification using self-quenching fluorescence probe |
ATE196322T1 (de) * | 1995-05-05 | 2000-09-15 | Perkin Elmer Corp | Methoden and reagentien fuer die kombination einer pcr-amplifizierung mit einem hybridisierungs-assay |
US5853990A (en) * | 1996-07-26 | 1998-12-29 | Edward E. Winger | Real time homogeneous nucleotide assay |
US5853992A (en) * | 1996-10-04 | 1998-12-29 | The Regents Of The University Of California | Cyanine dyes with high-absorbance cross section as donor chromophores in energy transfer labels |
-
2000
- 2000-09-22 CA CA002385658A patent/CA2385658A1/en not_active Abandoned
- 2000-09-22 WO PCT/JP2000/006524 patent/WO2001022089A1/ja not_active Application Discontinuation
- 2000-09-22 AU AU73207/00A patent/AU780156B2/en not_active Ceased
- 2000-09-22 EP EP00961205A patent/EP1215498A4/en not_active Withdrawn
Non-Patent Citations (2)
Title |
---|
K. SHINOZUKA: "A novel multifunctionally labeled DNA probe bearing an intercalator and a fluorphore", J. CHEM. SOC., CHEM. COMMUN., 1994, pages 1377 - 1378, XP002935102 * |
See also references of EP1215498A4 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012147722A (ja) * | 2011-01-19 | 2012-08-09 | Toppan Printing Co Ltd | エネルギー移動を用いた蛍光物質による核酸検出法 |
Also Published As
Publication number | Publication date |
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AU7320700A (en) | 2001-04-24 |
AU780156B2 (en) | 2005-03-03 |
EP1215498A1 (en) | 2002-06-19 |
EP1215498A4 (en) | 2005-04-20 |
CA2385658A1 (en) | 2001-03-29 |
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