WO2015126078A1 - 핵산과 신호 프로브의 비대칭 등온증폭을 이용한 핵산의 검출방법 - Google Patents
핵산과 신호 프로브의 비대칭 등온증폭을 이용한 핵산의 검출방법 Download PDFInfo
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Definitions
- the present invention relates to an isothermal amplification method of a nucleic acid and a signal probe and a method for detecting a nucleic acid using an amplified signal probe, and more particularly, an external primer set, a DNA-RNA-DNA hybrid primer set, and a DNA-RNA-DNA hybrid signal.
- the present invention relates to a method for amplifying a target nucleic acid and a signal probe simultaneously using a probe and rapidly detecting the target nucleic acid. More specifically, the ratio of the forward DNA-RNA-DNA hybrid primers and the reverse DNA-RNA-DNA hybrid primers is asymmetrically amplified and asymmetrically amplified.
- the present invention relates to a method for detecting nucleic acid at an isothermal temperature by amplifying a signal using a DNA-RNA-DNA hybrid signal probe having a nucleotide sequence complementary to an excessively amplified DNA.
- Nucleic acid amplification is a very useful technique for detecting and analyzing small amounts of nucleic acids.
- the high sensitivity of nucleic acid amplification to target nucleic acids has led to advances in the isolation of genes and the detection of specific nucleic acids in forensic aspects for the diagnosis and analysis of infectious and hereditary diseases. Methods have been developed to perform highly sensitive diagnostic assays (Belkum, Current Opinion in Pharmacology, 3: 497, 2003).
- nucleic acid is due to the complementarity of the DNA strand and the ability of a single stranded nucleic acid to form a double stranded hybrid molecule in vitro , by which the specific nucleic acid can be detected in a sample (Barry et al ., Current Opinion in Biotechnology, 12: 21, 2001).
- Probes used for nucleic acid detection consist of specific sequences that can hybridize with target sequences present in nucleic acid samples.
- the probe is read by chemicals, immuno-chemicals, fluorescence or radioisotopes.
- the probe is configured to include a label or reporter molecule, such as biotin and dioxygenin, or a fluorescent material capable of reading DNA hybridization with a short fragment of nucleic acid having a complementary sequence to the target nucleic acid.
- nucleic acid detection method in particular, cannot detect short sequences on chromosomal DNA, has a low copy number, and has a limitation in solving limited copy numbers of modified alleles for wild-type genes.
- Other problems with nucleic acid detection methods relate to environmental conditions in vitro or in situ that limit the physical interaction of target sequences, chemicals, or probes with other molecules or structures.
- Methods for detecting target nucleic acids can be grouped into three categories: amplification of a target nucleic acid sequence, which is a method of amplifying target nucleic acids, amplification of a probe that amplifies the probe molecule itself, and a signal indicating each probe by a complex probe or a connecting probe. There is signal amplification that is increased by technology.
- PCR polymerase chain reaction
- a replica of each helix of is synthesized.
- a pre-programmed thermal cycling instrument is required.
- this method is expensive, relatively low in specificity, and has the disadvantage of extremely standardizing the performance steps in order to reproduce the results.
- LCR ligase chain reaction
- LCR Since LCR has a higher discriminatory power than the primer extension of a nucleic acid using a primer, it exhibits allele specificity higher than PCR in genotyping point mutation. LCR has the highest specificity among the nucleic acid amplification techniques developed so far, and since all identification mechanisms are optimized, it is the easiest method to perform, but it has the slowest reaction rate and requires a large number of modified probes. have.
- Strand displacement amplification is a method of amplifying a target nucleic acid sequence in a sample and its complementary helix by strand displacement through an endonuclease.
- This method comprises a mixture containing at least one nucleic acid polymerase, dNTPs comprising at least one substituted deoxynucleoside triphosphate (dNTP), and at least one primer complementary to the 3 'end of the target fragment.
- dNTPs comprising at least one substituted deoxynucleoside triphosphate (dNTP)
- dNTP substituted deoxynucleoside triphosphate
- Each primer has a sequence recognized by a restriction endonuclease at the 5 'end (Walker et al., Nucleic Acids Res., 20: 1691, 1992).
- the primers are stretched using RNA-DNA hybrid primers or RNA primers in a similar manner to the SDA method, and then the primers and template DNA are cleaved using an RNaseH enzyme that cleaves RNA primers that hybridize with the template DNA.
- Method of stretching new primer by substitution single primer isothermal amplification (SPIA) method using 5'-RNA-DNA-3 'primer (US Pat. No. 6,251,639), using 5'-DNA-RNA-3' primer Isothermal chimeric primer-initiated amplification of nucleic acid (ICAN) method (U.S. Patent Application 2005/0123950), Riboprimer method using RNA primer (U.S. Patent Application 2004/0180361), external primer and internal DNA-RNA-DNA hybrid primer Methods (US Pat. No. 5,824,517) and the like.
- SPIA single primer isothermal amplification
- ICAN Isothermal chimeric primer-initiated amplification of nucleic acid
- TMA Transcription mediated amplification
- the TMA method combines a mixture consisting essentially of the target nucleic acid with a promoter-primer, an oligonucleotide that is complementary to the 3 'end of the target sequence for hybridization with the 3' end of the target nucleic acid or a region adjacent thereto. It is characterized by.
- the promoter-primer also includes a promoter region sequence for an RNA polymerase located at the 5 'end of the complexing sequence. The promoter-primer and target sequence form a promoter-primer / target sequence hybrid so that the DNA is stretched.
- the 3 'end of the target sequence extends from a position close to the complex in which the promoter primer hybridizes between the complexing sequence and the target sequence.
- the promoter sequence acts as a template for the stretching process, producing the first DNA stretch product to form a double helix promoter sequence.
- the 3 'end of the promoter-primer can also be used as a primer for the second DNA extension process.
- a double-stranded nucleic acid complex is formed using a target sequence as a template.
- the complex is a DNA / RNA complex when the RNA target sequence is used, and a DNA / DNA complex when the DNA target sequence is used.
- an RNA polymerase that recognizes a promoter-promoter promoter to produce various RNA copies of the target sequence synthesizes RNA using the first DNA kidney product.
- Nucleic acid sequence-based amplification (NASBA) methods include the synthesis of single-stranded RNA, the synthesis of single-stranded DNA and the synthesis of double-stranded DNA (Compton, Nature , 350: 91, 1991).
- the single helix RNA is the first template for the first primer
- the single helix DNA is the second template for the second primer
- the double helix DNA is the third in synthesizing a copy for the first template. It becomes a template.
- thermocycling processes such as PCR require a thermocycling block to reach the "target" temperature of each cycle, and a delay time until the thermal block reaches the target temperature requires amplification.
- the disadvantage is that it requires a long time until.
- Isothermal target nucleic acid amplification methods such as SDA, NASBA, and TMA
- SDA SDA
- NASBA NASBA
- TMA isothermal target nucleic acid amplification method
- Nucleic acid amplification according to the SDA method is limited in its applicability because there must be a site for a defined restriction enzyme, and transcription-based amplification methods such as NASBA and TMA require binding of the polymerase promoter sequence and amplification products by primers. This process tends to result in non-specific amplification. Because of this drawback, the amplification mechanism of DNA targets by these transcription-based amplification methods is not well established.
- the current amplification method is another disadvantage is that the test sample may be contaminated by the amplification product of the prior amplification reaction, thereby resulting in non-target specific amplification of the sample.
- methods for detecting contamination of test solutions employing various means and physical means for decontaminating the test sample at the end of the amplification reaction or before initiation of amplification of the target nucleic acid have been developed. Make it.
- Another method for nucleic acid detection is to amplify a signal rather than amplifying a target nucleic acid or a probe.
- bDNA branched DNA
- Hybrid capture method using signal amplification has sensitivity similar to that of direct detection of target nucleic acid and amplification of target nucleic acid, and uses antibody or chemiluminescent material for signal detection.
- a method of amplifying a signal probe (cycling probe technology) amplification method uses a DNA-RNA-DNA hybrid signal probe having a nucleotide sequence complementary to the target nucleic acid, and when the target nucleic acid is hybridized with the target nucleic acid, the RNA portion of the hybrid signal probe is cleaved and cleaved by an RNaseH enzyme.
- a method that separates the target nucleic acid and another DNA-RNA-DNA hybrid signal probe hybridizes with the target nucleic acid to produce a cleaved probe, resulting in cyclic amplification of the signal probe.
- Probe detection method using fluorescent resonance energy transfer (FRET) that detects cleaved signal probes by labeling fluorescent material and fluorescent inhibitor at both ends of DNA-RNA-DNA
- FRET fluorescent resonance energy transfer
- the CPT method has a relatively low amplification efficiency of 10 2 to 10 4 , making it difficult to use for independent diagnosis, and by increasing the amount of a specific site of a target nucleic acid primarily by conventional nucleic acid amplification such as PCR, a signal probe is separately applied. Amplification is complicated to use and has a disadvantage of high cost.
- Asymmetric PCR is a derivative of PCR that selectively amplifies a single DNA only from a double-stranded DNA template and is useful for the synthesis of single-stranded DNA templates for sequencing sequences.
- asymmetric PCR methods are much more effective in detecting adenoviruses compared to symmetric PCR methods using molecular beacon probes. gave.
- Asymmetric PCR was also used for template synthesis of fluorescence resonance energy transfer (FRET) hybridization probes for single nucleotide polymorphism of the factor V gene.
- FRET fluorescence resonance energy transfer
- the asymmetric PCR method induces different concentrations of the forward and reverse primers so that the amount of the amplified product synthesized by the forward primer and the amplified product synthesized by the reverse primer is different. It provides a method for solving the problem of binding between amplification products.
- the excess primers induce linear amplification, increasing the PCR amplification efficiency. .
- asymmetric PCR has higher amplification efficiency than symmetric PCR, but the difference is not so great.
- the reason for this can be interpreted as the re-association of amplification products or amplification products and primers in PCR during denaturation of temperature.
- the asymmetric method is more effective than PCR.
- the asymmetric amplification method is very effective in the case of using a probe that binds to the amplification product synthesized by the forward or reverse primer.
- the binding between the amplification products synthesized by the forward and reverse primers and the competitive binding between the probe and the complementary amplification product and the probe occur.
- the length of the nucleotide sequence of the amplification product is longer than the length of the nucleotide sequence of the probe, the probability of signal generation due to the binding between the amplification products is much higher than the probability of signal generation by the binding of the amplification product and the brobe.
- the concentration of the probe is higher than that of the amplification product, but the binding between the amplification product and the probe is superior.
- the concentration of the amplification product is increased. Signaling by the coupling is reduced and signal generation is eventually stopped. Therefore, if an excessive amount of primers for synthesizing an amplification product that binds to the probe among the amplification products synthesized by the forward or reverse primers is induced, induction of binding between the amplification product having the nucleotide sequence complementary to the probe and the probe may result. Increasing the signal generation probability by the combination of probes ultimately become a more efficient amplification method.
- Nonspecific amplification is classified as a very serious problem that results in false positives, which makes the diagnosis less accurate. Therefore, most primers are designed using advanced technologies such as computer simulation using bioinformatics. However, computer simulations are not always consistent with actual experimental results, so even non-specific amplification of primers designed by bioinformatics techniques cannot be completely ruled out.
- the primer-dimer phenomenon amplification by binding between primers using excessive amounts in the amplification process, results in a decrease in the accuracy of nucleic acid amplification.
- the problem is very large in isothermal amplification using primers having a relatively long length compared to PCR primers.
- the inventor's prior patent is a symmetric isothermal amplification method for detecting target nucleic acids by isothermally amplifying nucleic acid and a signal probe simultaneously using the same amount of forward and reverse DNA-RNA-DNA hybrid primers.
- the prior art has a problem of a cumbersome method of adding an enzyme reaction mixture after denaturing the reaction mixture comprising a target DNA and a primer set for amplification.
- the present inventors have overcome the disadvantages described above, improve the detection sensitivity of the target nucleic acid to develop a method for accurately amplifying and detecting the amplified product at the same time as the target nucleic acid amplification, as a result, the base complementary to the target nucleic acid Using asymmetric methods to vary the ratio of the forward and reverse primers of a set of external primers with sequences and a set of DNA-RNA-DNA hybrid primers with partially complementary nucleotide sequences to target nucleic acids, The present invention has been accomplished by confirming that amplification can be more efficiently amplified than symmetrical methods and lower nonspecific amplification by binding between primers.
- the present inventors focus on the precedent of the LAMP method (Maruyama et al. Appl. Environ. By applying to the present invention to confirm that it can be easily and efficiently amplified without a separate denaturation process and completed the present invention.
- Another object of the present invention to provide a method for rapidly and accurately amplifying a target nucleic acid and a signal probe at isothermal. Another object of the present invention to provide a method for detecting a target nucleic acid, characterized in that the amplification of the target nucleic acid and the probe signal at an isothermal at the same time.
- the present invention provides a kit comprising: (i) a target DNA, (ii) an external primer set having a base sequence complementary to the target DNA, (iii) the target DNA and the 3 'terminal DNA portion are complementary and 5' A DNA-RNA-DNA hybrid primer set in which the terminal DNA-RNA portion has a non-complementary sequence, and (iv) a DNA-RNA- having a base sequence complementary to an amplification product produced by the hybrid primer set with the external primer set.
- a target comprising a step of adding an enzyme reaction mixture containing a DNA polymerase capable of chain substitution and an RNA degrading enzyme to a reaction mixture including a DNA hybrid signal probe, and then simultaneously amplifying the target DNA and the signal probe at an isothermal temperature.
- the ratio of the forward primer and the reverse primer of the DNA-RNA-DNA hybrid primer set used in the reaction mixture includes amplification of the single stranded nucleic acid asymmetrically using an excess in one side.
- the present invention has an effect of providing a method for rapidly and accurately amplifying a target nucleic acid at isothermal temperature and a method for detecting a nucleic acid simultaneously performing amplification of a target nucleic acid and amplification of a signal probe at an isothermal temperature.
- the target nucleic acid can be amplified quickly and accurately without the risk of contamination, and can be amplified at the same time. It is useful in the detection of genetic alterations, diagnosis of genetic diseases or diseases, diagnosis of gene expression, and various genome projects, which are useful for molecular biological research and disease diagnosis.
- the asymmetric isothermal amplification method improves sensitivity and specificity compared to the conventional symmetric isothermal amplification method, thereby enabling a more accurate diagnosis.
- Figure 1 schematically shows the isothermal amplification method of the target DNA according to the present invention.
- Figure 2 schematically shows an isothermal amplification method of the target DNA and the signal probe according to the present invention.
- Figure 3 schematically shows the difference between the symmetric isothermal amplification method and the asymmetric isothermal amplification method according to the present invention.
- Figure 4 shows the results of measuring the fluorescent signal (Delta Rn) generated by the symmetric isothermal amplification method and the asymmetric isothermal amplification method according to the present invention targeting the Mycobacterium tuberculosis with real-time fluorescence detection equipment.
- Figure 5 shows the results of measuring the fluorescence signal (Delta Rn) generated by the symmetric isothermal amplification method and the asymmetric isothermal amplification method according to the present invention targeting Chlamydia by real-time fluorescence detection equipment.
- Figure 6 shows the result of measuring the fluorescent signal (Delta Rn) generated by the symmetric isothermal amplification method and the asymmetric isothermal amplification method according to the present invention with a target of the bacterium by real-time fluorescence detection equipment.
- Figure 7 shows the results of measuring the fluorescent signal (Delta Rn) generated by the symmetric isothermal amplification method and the asymmetric isothermal amplification method according to the present invention to the Listeria bacteria by real-time fluorescence detection equipment.
- Figure 8 shows the results of measuring the fluorescence signal (Delta Rn) generated by the symmetric isothermal amplification method and the asymmetric isothermal amplification method according to the present invention targeting Salmonella with real-time fluorescence detection equipment.
- the present invention provides a kit comprising: (i) a target DNA, (ii) an external primer set having a base sequence complementary to the target DNA, (iii) a 3 'terminal DNA portion complementary to the target DNA and a 5' terminal DNA- DNA-RNA-DNA hybrid primer set in which the RNA portion has non-complementary sequences, and (iv) DNA-RNA-DNA hybrid signal having a nucleotide sequence complementary to the amplification product produced by the hybrid primer set with the external primer set.
- a kit comprising: (i) a target DNA, (ii) an external primer set having a base sequence complementary to the target DNA, (iii) a 3 'terminal DNA portion complementary to the target DNA and a 5' terminal DNA- DNA-RNA-DNA hybrid primer set in which the RNA portion has non-complementary sequences, and (iv) DNA-RNA-DNA hybrid signal having a nucleotide sequence complementary to the amplification product produced by the hybrid primer set with the external primer set.
- the ratio of the forward primer and the reverse primer of the DNA-RNA-DNA hybrid primer set used in the reaction mixture includes amplification of the single stranded nucleic acid asymmetrically using an excess in one side.
- isothermal amplification of the target DNA according to the present invention may be performed by the following procedure.
- an enzyme reaction solution containing a DNA polymerase and an RNA degrading enzyme is mixed with a mixture of a target DNA, an external primer set, a DNA-RNA-DNA hybrid primer set, and a DNA-RNA-DNA hybrid probe to be a template for amplification. Then amplify.
- the external primer set and the DNA-RNA-DNA hybrid primer set are annealed to the target DNA in the reaction solution.
- the outer primer set includes a sequence complementary to a sequence closer to both ends of the target DNA than the hybrid primer set
- the hybrid primer set includes a sequence closer to the center of the target DNA than the outer primer.
- the hybrid primers are annealed ahead of the DNA chain extension direction than the outer primers.
- the annealed external primers and hybrid primers are stretched by a DNA polymerase capable of chain substitution, and as the external primers are stretched along the target DNA, the stretched DNA chain is separated from the target DNA in the hybrid primer located in the forward direction of the extension direction. Chain substitution occurs as a result, and finally, a single-stranded DNA amplification product elongated in the hybrid primer and a double-stranded DNA amplification product elongated in the outer primer are obtained.
- External primers and hybrid primers are annealed using the single-stranded DNA which is the amplification product as a template.
- the annealed external primers and hybrid primers are stretched by DNA polymerase capable of chain substitution, and the DNA chains stretched from the hybrid primers located in the front of the stretch direction as the external primers are stretched along the single-stranded DNA are single-stranded DNA. Chain substitutions occur at and off, resulting in new single-stranded DNA amplification products stretched in hybrid primers and double-stranded DNA amplification products stretched in outer primers.
- DNA-RNA-DNA hybrid primers are annealed and stretched using the amplified single-stranded DNA as a template to obtain a double-stranded DNA amplification product including RNA.
- RNA portion of double-stranded DNA is degraded by RNase H, and single-stranded DNA is produced by elongation and chain substitution.
- the target DNA is amplified by repeating the process of annealing, stretching, chain substitution, and RNA cleavage of the primer using the single-stranded DNA as a template (FIG. 1).
- the amplification of the signal probe according to an embodiment of the present invention is performed simultaneously with the nucleic acid isothermal amplification.
- the DNA amplified through the isothermal amplification of the target DNA is annealed with the DNA-RNA-DNA hybrid signal probe to form an RNA / DNA hybrid double helix, the RNA portion of the DNA-RNA-DNA hybrid signal probe is activated by RNase H activity.
- the cleaved and cleaved signal probe is separated from the target DNA, the new DNA-RNA-DNA hybrid signal probe is coupled, and the cycle of cleavage and cleavage by RNase H is repeated, thereby amplifying the signal probe.
- the excess primer generates an amplification product in one direction and is amplified in excess.
- the asymmetric isothermal amplification method increases the amplification of the signal probe as compared to the symmetric isothermal amplification method.
- the length of the amplified product amplified by the primer is longer than the length of the probe, so in the symmetrical amplification method, the coupling between the amplification products is more likely than the coupling between the amplification product and the probe.
- the asymmetric isothermal amplification method is improved in sensitivity compared to the conventional symmetric isothermal amplification method.
- the asymmetric isothermal amplification method shows an improvement in specificity compared to the conventional symmetric isothermal amplification method.
- the external primer set used in the present invention may use any one selected from the group consisting of oligo DNA, oligo RNA, and hybrid oligo RNA / DNA, and is complementary to the target nucleic acid sequence and has 15 to 30 bases. It is preferable.
- the target DNA sequence complementary to the external primer is preferably a sequence adjacent to the target DNA sequence complementary to the hybrid primer (1 to 60bp difference), and the target DNA sequence complementary to the outer primer is a DNA sequence complementary to the hybrid primer. It is more preferred that the sequence is closer to the 3 'end of the target DNA sequence.
- the DNA-RNA-DNA hybrid primer set used in the present invention has a 5 'terminal DNA-RNA portion having a non-complementary base sequence with the target DNA sequence, and a 3' terminal DNA portion has a base sequence complementary to the target DNA. It features.
- the DNA-RNA-DNA hybrid primer is preferably composed of 32 to 66 bases, wherein the length of the DNA portion is each 15 to 30 bases, and the RNA portion is preferably 1 to 6 bases in length.
- the sequence of the target DNA complementary to the DNA-RNA-DNA hybrid primer includes a sequence located 3 'to the end of the sequence of the target DNA complementary to the external primer, the target DNA sequence complementary to the hybrid primer Is preferably a sequence adjacent to the target DNA sequence complementary to the external primer (1 to 60bp difference).
- the DNA polymerase used in the present invention is an enzyme capable of expanding a nucleic acid primer along a DNA template, and should be able to replace the nucleic acid strand from the polynucleotide to which the substituted strand is bound.
- DNA polymerase that can be used in the present invention is preferably a heat-resistant DNA polymerase, heat-resistant DNA polymerase Bst DNA polymerase, exo (-) vent DNA polymerase, exo (-) Deep vent DNA polymerase, exo (-) Pfu DNA polymerase, Bca DNA polymerase, pi 29 DNA polymerase, etc. can be illustrated.
- RNA degrading enzyme used in the present invention is specific for cleaving the RNA strand of the RNA / DNA hybrid, preferably does not degrade single-stranded RNA, and preferably RNase H is used.
- the DNA-RNA-DNA hybrid signal probe used in the present invention is an oligonucleotide having a nucleotide sequence complementary to a nucleic acid amplification product amplified by a primer used in excess of a forward or reverse primer in the DNA-RNA-DNA hybrid primer set.
- the 5 'end and 3' end of the DNA-RNA-DNA hybrid signal probe are composed of oligo DNA, and the middle part is composed of oligo RNA.
- the DNA-RNA-DNA hybrid signal probe is preferably composed of 18 to 38 bases, the DNA portion at the 5 'end and the third end is preferably composed of 8 to 16 bases, respectively, the middle RNA portion is 1 It is preferably composed of ⁇ 6 bases.
- the DNA-RNA-DNA hybrid signal probe may be characterized in that the terminal is labeled with a labeling substance, and the labeling substance may be a fluorescent substance, a fluorescent signal inhibitor, or the like.
- Concentration ratio of the forward primer and the reverse primer in the hybrid primer set used in the present invention may be used from 1: 5 to 1:20 or 5: 1 to 20: 1, more preferably 1:10 or 10: 1. Can be.
- the hybrid primer used in excess has a base sequence complementary to the hybrid probe.
- the isothermal amplification is preferably performed at a temperature at which the primer of the present invention and the template DNA can be annealed and do not substantially inhibit the activity of the enzyme used.
- the temperature at which the amplification reaction is performed is preferably 30 to 75 ° C, more preferably 37 to 70 ° C, and most preferably 50 to 65 ° C.
- the method for isothermal amplification of nucleic acids according to the present invention uses additional external primers, the specificity thereof is higher than that of the conventional method using a single RNA-DNA hybrid primer (US Pat. No. 6,251,639), and is substituted by an external primer. It is possible to dramatically improve the amplification efficiency by the internal primer prepared as a new template to amplify exponentially.
- RNA-DNA hybrid primer to use a separate blocker or template switch oligonucleotide (TSO) that blocks amplification to amplify a specific site when amplifying a target sequence
- TSO template switch oligonucleotide
- the present invention has the advantage of using a forward primer and a reverse primer pair to cleanly amplify only the desired site without using a separate blocker or template switch oligonucleotide.
- the amplified DNA can be amplified by repeating the cycle of DNA-RNA-DNA hybrid signal probe binding and separation, so that the nucleic acid amplification and signal probe amplification can be performed simultaneously in a single-tube.
- DNA-RNA-DNA hybrid primers US Pat. No. 5,824,517
- DNA-RNA-DNA hybrid signal probes which can simultaneously perform nucleic acid amplification and signal probe amplification.
- US Patent Application 2005/0214809 there is an advantage of simultaneously amplifying a nucleic acid and a signal probe.
- the isothermal amplification method of a nucleic acid according to the present invention is asymmetrically amplified in excess of asymmetric isothermal nucleic acid and signal probe amplification methods using the same amount of forward primers and reverse primers in an asymmetric excessive amount, which varies the ratio of the forward primers and the reverse primers.
- a signal probe having a complementary sequence can be annealed, thereby effectively amplifying the signal probe, thereby improving the sensitivity and specificity of nucleic acid detection.
- the present invention also provides a 5 'terminal DNA-RNA portion of the DNA-RNA-DNA hybrid primer to be used has a non-complementary sequence with the template, so that the RNA degradation enzyme in the conventional method using a single RNA-DNA hybrid primer There is an advantage that it is not necessary to consider the problem that occurs when the reaction activity is higher than the primer extension activity of the DNA polymerase.
- the template and the non-complementary RNA site act as a complementary template to the primer.
- Increasing the annealing temperature with the primer not only increases the amplification efficiency, but also prevents the formation of primer-dimer, thereby increasing the purity of the amplification product.
- the isothermal amplification method of nucleic acid of the present invention takes about 1 hour from DNA extraction to complete amplification of the sample, and if the extraction of the sample DNA takes about 40 minutes, the amplification reaction can be performed very quickly. There is this.
- the present invention provides a kit comprising: (i) a target DNA, (ii) an external primer set having a nucleotide sequence complementary to the target DNA, (iii) the target DNA and a 3 'terminal DNA portion are complementary and 5' terminal DNA- DNA-RNA-DNA hybrid primer set in which the RNA portion has non-complementary sequences, and (iv) DNA-RNA-DNA hybrid signal having a nucleotide sequence complementary to the amplification product produced by the hybrid primer set with the external primer set.
- Adding isoenzyme reaction mixture containing chain polymerizable DNA polymerase and RNA degrading enzyme to a reaction mixture including a probe, and then amplifying the target DNA and the signal probe at an isothermal temperature simultaneously.
- the ratio of the forward primer and the reverse primer in the hybrid primer set used in the reaction mixture includes amplification of the single stranded nucleic acid asymmetrically using an excess of one.
- the signal probe amplified by the method of the present invention can detect a fluorescent signal directly in the reaction tube without a separate post-processing process using a fluorescence detector.
- the DNA-RNA-DNA hybrid probe is labeled with a fluorescent material and a fluorescent signal suppressor at the ends thereof, and before the probe is cleaved, the fluorescent energy is transferred to the fluorescent signal inhibitor and the emission of the fluorescent signal is suppressed. It is a signal probe in the form of fluorescence resonance energy transfer (FRET) that does not occur after the probe is cut.
- FRET fluorescence resonance energy transfer
- the isothermal amplification method and nucleic acid detection method of a nucleic acid according to the present invention is a one-step nucleic acid and signal probe isothermal amplification that performs a reaction at a constant temperature.
- the target nucleic acid can be easily amplified, and by using two pairs of primer sets and probes in the amplification process, there is an advantage that it can amplify not only the target nucleic acid accurately but also the signal probe as compared to the conventional method.
- Asymmetric nucleic acid and signal probe methods that vary the ratio of forward hybrid primers and reverse hybrid primers in the process, which enhances annealing opportunities of amplified DNA templates and signal probes, resulting in improved sensitivity and specificity. .
- the isothermal amplification method and the nucleic acid detection method of the nucleic acid according to the present invention is made in one isothermal one-tube (one-tube), has the advantage that a large amount of processing for the real-time detection of the nucleic acid is possible. This advantage can minimize the risk of additional reactions due to contamination, which has limited the widespread use of amplifier technology.
- the outer primers (SEQ ID NO: 1 and SEQ ID NO: 2) were designed to include sequences complementary to the Mycobacterium tuberculosis IS6110 nucleotide sequence, and SEQ ID NO: 1 (forward, sense) and SEQ ID NO: 2 (reverse, anti-sense) are as follows. .
- DNA-RNA-DNA hybrid primers (SEQ ID NO: 3 and SEQ ID NO: 4) have a 5 'terminal oligo DNA-RNA portion having a non-complementary sequence to the Mycobacterium tuberculosis IS6110 sequence, and the 3' terminal oligo DNA portion is a Mycobacterium tuberculosis IS6110 base Designed to have a sequence complementary to the sequence, SEQ ID NO: 3 (forward, sense) and SEQ ID NO: 4 (reverse, anti-sense) are as follows (uploaded and the RNA portion is underlined).
- the DNA-RNA-DNA hybrid signal probe (SEQ ID NO: 5) for performing signal probe amplification has a nucleotide sequence complementary to the DNA amplified by the primer set above, and the 5 'end is FAM dye and the 3' end is Labeled with DABCYL quencher, SEQ ID NO: 5 (anti-sense) is as follows (uploaded and RNA portions are underlined).
- reaction mixture In order to amplify a target nucleic acid using the external primer set and the hybrid primer set, first, a reaction mixture and an enzyme mixture containing the external primer set and the hybrid primer set were prepared.
- the reaction mixture is 10 mM Tris-HCl pH 8.5 buffer, 10 mM (NH 4 ) 2 SO 4 , 10 mM MgSO 4 , 50 mM KCl, 1.6 mM dNTP (Fermentas), 1.6 mM DTT, 0.1 ⁇ g BSA, 0.6 mM spermine, 100 mM prepared by adding trehalose, 0.11 ⁇ M external primer set (IDT), 1.1 ⁇ M hybrid primer set (IDT) (2.2 ⁇ M forward hybrid primer (sense) and 0.22 ⁇ M reverse hybrid primer (anti-sense) for asymmetric isothermal amplification) It was.
- the enzyme mixture was prepared by adding 1 unit Bst polymerase (NEB), 6 units RNase H (Epicentre), 6 units
- the asymmetric isothermal amplification method showed better detection capability than the symmetric isothermal amplification method.
- Chlamydia trachomatis genomic DNA was used as the target DNA.
- genomic DNA was extracted from Chlamydia strain (ATCC Cat. No. VR-887) using G-spin TM Genomic DNA extraction Kit (iNtRON Biotechnology, Cat. No. 17121) and then amplified. Was carried out. Genomic DNA extraction was performed by centrifuging the microbial suspension at 13,000 rpm for 1 minute to remove the supernatant, gently mixing with 500 ⁇ l PBS (pH 7.2), centrifuging to remove the supernatant, and then adding RNase A and Proteinase K.
- the cell pellet was suspended by adding 300 ⁇ l of a -buffer solution and allowed to stand at 65 ° C. for 15 minutes. Next, 250 ⁇ l of Binding Buffer was added and mixed well, and DNA was bound to the spin column. 500 ml of washing buffer A was added and then removed by centrifugation at 13000 rpm for 1 minute, 500 ml of washing buffer B was added and centrifuged. The column was transferred to a 1.5ml microcentrifuge tube, 50 ⁇ l of eleution buffer was added, and centrifuged for 1 minute to obtain 15.8ng / ml genomic DNA. This was diluted to a certain amount and used as a template for the isothermal amplification reaction.
- the external primers (SEQ ID NO: 6 and SEQ ID NO: 7) are designed to include sequences complementary to the Chlamydia trachomatis cryptic plasmid DNA sequence, and SEQ ID NO: 6 (forward, sense) and SEQ ID NO: 7 (reverse, anti-sense) Same as
- DNA-RNA-DNA hybrid primers (SEQ ID NO: 8 and SEQ ID NO: 9) have 5 'terminal oligo DNA-RNA moieties that are non-complementary to Chlamydia trachomatis cryptic plasmid DNA, and 3' terminal oligo DNA moieties are Chlamydia trachomatis cryptic plasmid Designed to have a sequence complementary to the DNA base sequence, SEQ ID NO: 8 (forward, sense) and SEQ ID NO: 9 (reverse anti-sense) are as follows (uploaded and RNA parts are underlined).
- DNA-RNA-DNA hybrid signal probe (SEQ ID NO: 5) for performing signal probe amplification has a base sequence complementary to DNA amplified by the above primer set, 5 'end is FAM dye, and 3' end is Labeled with BHQ1 quencher, SEQ ID NO: 10 (sense) is as follows (uploaded and the RNA portion is underlined).
- SEQ ID NO: 10 5'-FAM-GGTAAAGCTC UGAUAU TTGAAGACTCT-BHQ1-3 '
- reaction mixture was 10 mM (NH 4 ) 2 SO 4 , 20 mM MgSO 4 , 10 mM KCl, 1 mM dNTP (Fermentas), 1 mM DTT, 0.1 ⁇ g BSA, 0.15 mM spermine, 20 mM trehalose, in a 5 mM Tris-HCl pH 8.5 buffer.
- the enzyme mixture was prepared by adding 3 units Bst polymerase (NEB), 8 units RNase H (Epicentre), 6 units RNase inhibitor (NEB), and 50 nM hybrid signal probe (IDT).
- the asymmetric isothermal amplification method showed better detection capability than the symmetric isothermal amplification method.
- Neisseria gonorrhoease genomic DNA was used as target DNA.
- genomic DNA was extracted from Gonococcus strain (ATCC Cat. No. 49226) using G-spin TM Genomic DNA extraction Kit (iNtRON Biotechnology, Cat. No. 17121) and then amplified. .
- Genomic DNA extraction was performed by centrifuging the microbial suspension at 13,000 rpm for 1 minute to remove the supernatant, gently mixing with 500 ⁇ l PBS (pH 7.2), centrifuging to remove the supernatant, and then adding RNase A and Proteinase K.
- the cell pellet was suspended by adding 300 ⁇ l of a -buffer solution and allowed to stand at 65 ° C.
- Binding Buffer 250 ⁇ l was added and mixed well, and DNA was bound to the spin column. After 500 ⁇ l of washing buffer A was added, it was removed by centrifugation at 13000 rpm for 1 minute, and 500 ⁇ l of washing buffer B was added and centrifuged. The column was transferred to a 1.5ml microcentrifuge tube, 50 ⁇ l of eleution buffer was added, and centrifuged for 1 minute to obtain 4.7ng / ml genomic DNA. This was diluted to a certain amount and used as a template for the isothermal amplification reaction.
- the external primers are designed to include sequences complementary to the Neisseria gonorrhoease opa gene DNA sequence, SEQ ID NO: 11 (forward, sense) and SEQ ID NO: 12 (reverse, anti-sense) Same as
- the DNA-RNA-DNA hybrid primers (SEQ ID NO: 13 and SEQ ID NO: 14) are designed to contain sequences that are non-complementary to the 5 'terminal oligo DNA-RNA portion of the Neisseria gonorrhoease opa gene DNA sequence, and the 3' terminal oligo DNA portion.
- Neisseria gonorrhoease opa gene was designed to include a sequence complementary to the DNA sequence, SEQ ID NO: 13 (forward, sense) and SEQ ID NO: 14 (reverse anti-sense) are as follows. (Uploaded and RNA parts are underlined)
- DNA-RNA-DNA hybrid signal probe (SEQ ID NO: 15) for performing signal probe amplification has a base sequence complementary to DNA amplified by the above primer set, 5 'end is FAM dye, and 3' end is Labeled with DABCYL quencher, SEQ ID NO: 15 (anti-sense) is as follows (uploaded and the RNA portion is underlined).
- reaction mixture In order to amplify a target nucleic acid using the external primer set and the hybrid primer set, first, a reaction mixture and an enzyme mixture containing the external primer set and the hybrid primer set were prepared.
- the reaction mixture was 10 mM Tris-HCl pH 8.5 buffer, 10 mM (NH 4 ) 2 SO 4 , 10 mM MgSO 4 , 10 mM KCl, 1.6 mM dNTP (Fermentas), 5 mM DTT, 0.1 ⁇ g BSA, 0.4 mM spermine, 20 mM trehalose , 0.1 ⁇ M external primer set (IDT), 1 ⁇ M hybrid primer set (IDT) (4.4 ⁇ M forward hybrid primer (sense) and 0.44 ⁇ M reverse hybrid primer (anti-sense) for asymmetric isothermal amplification) were added.
- the enzyme mixture was prepared by adding 5 units Bst polymerase (NEB), 5 units RNase H (Epicentre), 6 units RNase inhibitor (
- the asymmetric isothermal amplification method showed better detection capability than the symmetric isothermal amplification method.
- genomic DNA was extracted from Listeria strain (ATCC Cat. No. 35152) using G-spin TM Genomic DNA extraction Kit (iNtRON Biotechnology, Cat. No. 17121) and then amplified. It was. Genomic DNA extraction was performed by centrifuging the microbial suspension at 13,000 rpm for 1 minute to remove the supernatant, gently mixing with 500 ⁇ l PBS (pH 7.2), centrifuging to remove the supernatant, and then adding RNase A and Proteinase K. The cell pellet was suspended by adding 300 ⁇ l of a -buffer solution and allowed to stand at 65 ° C. for 15 minutes.
- Binding Buffer 250ml was added and mixed well, and DNA was bound to the spin column. After 500 ⁇ l of washing buffer A was added, it was removed by centrifugation at 13000 rpm for 1 minute, and 500 ⁇ l of washing buffer B was added and centrifuged. The column was transferred to a 1.5ml microcentrifuge tube, 50 ⁇ l of eleution buffer was added, and centrifuged for 1 minute to obtain 8.4ng / ml genomic DNA. This was diluted to a certain amount and used as a template for the isothermal amplification reaction.
- the external primers are designed to include sequences complementary to the Listeria monocytogene actA gene DNA sequence, SEQ ID NO: 16 (forward, sense) and SEQ ID NO: 17 (reverse, anti-sense) Same as
- DNA-RNA-DNA hybrid primers (SEQ ID NO: 18 and SEQ ID NO: 19) are designed to contain sequences that are 5 'terminal oligo DNA-RNA portions that are non-complementary to the Listeria monocytogene actA gene DNA sequence, and the 3' terminal oligo DNA portion was designed to include a sequence complementary to the Listeria monocytogene actA gene DNA sequence, SEQ ID NO: 18 (forward, sense) and SEQ ID NO: 19 (reverse anti-sense) are as follows. (Uploaded and RNA parts are underlined)
- DNA-RNA-DNA hybrid signal probe for performing signal probe amplification has a base sequence complementary to DNA amplified by the above primer set, 5 'end is FAM dye, and 3' end is Labeled with black hole quencher 1 (BHQ1), SEQ ID NO: 20 (anti-sense) is as follows (uploaded and the RNA portion is underlined).
- reaction mixture In order to amplify a target nucleic acid using the external primer set and the hybrid primer set, first, a reaction mixture and an enzyme mixture containing the external primer set and the hybrid primer set were prepared.
- the reaction mixture was 10 mM Tris-HCl (pH 8.5) buffer, 10 mM (NH 4 ) 2 SO 4 , 12 mM MgSO 4 , 10 mM KCl, 1.8 mM dNTP (Fermentas), 6 mM DTT, 0.1 ⁇ g BSA, 0.8 mM spermine, 0.1 ⁇ M Outer primer set (IDT), 1 ⁇ M hybrid primer set (IDT) (0.01 ⁇ M forward external primer (sense) for asymmetric isothermal amplification, 0.1 ⁇ M forward hybrid primer (sense) and 0.1 ⁇ M reverse external primer (anti-sense), Prepared by addition of 1 ⁇ M reverse hybrid primer (anti-sense).
- the enzyme mixture was prepared by adding 3 units Bst poly
- strains for measuring specificity are Staphylcoccus aureus: Korean collection type culture (KCTC) 1927, Salmonella enterica (KCTC 1925), enteritis Vibrio (Vibrio parahaemolyticus; ATCC 17802), and Bacillus cereus; ATCC 49953) Shigella flexneri (KCTC 2517) and E.
- the asymmetric isothermal amplification method showed that the specificity is superior to the symmetric isothermal amplification method.
- Salmonella enterica genomic DNA was used as the target DNA.
- genomic DNA was extracted from Salmonella strain (KCTC 1925) using G-spin TM Genomic DNA extraction Kit (iNtRON Biotechnology, Cat. No. 17121) and subjected to amplification reaction.
- Genomic DNA extraction was performed by centrifuging the microbial suspension at 13,000 rpm for 1 minute to remove the supernatant, gently mixing with 500 ⁇ l PBS (pH 7.2), centrifuging to remove the supernatant, and then adding RNase A and Proteinase K.
- the cell pellet was suspended by adding 300 ⁇ l of a -buffer solution and allowed to stand at 65 ° C. for 15 minutes.
- Binding Buffer 250 ⁇ l was added and mixed well, and DNA was bound to the spin column. After adding 500 ml of washing buffer A, the mixture was removed by centrifugation at 13000 rpm for 1 minute, 500 ⁇ l of washing buffer B was added thereto, and centrifuged. The column was transferred to a 1.5ml microcentrifuge tube, 50 ⁇ l of eleution buffer was added, and centrifuged for 1 minute to obtain 6.7ng / ml genomic DNA. This was diluted to a certain amount and used as a template for the isothermal amplification reaction.
- the external primers (SEQ ID NO: 16 and SEQ ID NO: 17) were designed to include sequences complementary to the Salmonella enterica invA gene DNA sequence, SEQ ID NO: 21 (forward, sense) and SEQ ID NO: 22 (reverse, anti-sense) Same as
- DNA-RNA-DNA hybrid primers (SEQ ID NO: 23 and SEQ ID NO: 24) are designed to include sequences that are 5 'terminal oligo DNA-RNA portions that are non-complementary to the Salmonella enterica invA gene DNA sequence, and that the 3' terminal oligo DNA portion is Was designed to include a sequence complementary to the Salmonella enterica invA gene DNA sequence, SEQ ID NO: 23 (forward, sense) and SEQ ID NO: 24 (reverse anti-sense) are as follows. (Uploaded and RNA parts are underlined)
- DNA-RNA-DNA hybrid signal probe for performing signal probe amplification has a base sequence complementary to DNA amplified by the above primer set, 5 'end is FAM dye, and 3' end is Labeled with black hole quencher 1 (BHQ1), SEQ ID NO: 25 (anti-sense) is as follows (uploaded and the RNA portion is underlined).
- reaction mixture In order to amplify a target nucleic acid using the external primer set and the hybrid primer set, first, a reaction mixture and an enzyme mixture containing the external primer set and the hybrid primer set were prepared.
- the reaction mixture is 10 mM Tris-HCl (pH 8.5) buffer, 10 mM (NH 4 ) 2 SO 4 , 12 mM MgSO 4 , 10 mM KCl, 1.8 mM dNTP (Fermentas), 6 mM DTT, 0.1 ⁇ g BSA, 0.75 mM spermine, 0.075 ⁇ M Outer primer set (IDT), hybrid primer set (IDT) of 1.125 ⁇ M (0.075 ⁇ M forward outer primer (sense) for asymmetric isothermal amplification, 2.25 ⁇ M forward hybrid primer (sense) and 0.075 ⁇ M reverse outer primer (anti-sense) , 0.225 ⁇ M reverse hybrid primer (anti-sense) was added.
- the enzyme mixture was prepared by adding 3
- strains for measuring specificity are Staphylcoccus aureus: Korean collection type culture (KCTC) 1927, Listeria monocytogene (ATCC 5152), Enteritis Vibrio (Vibrio parahaemolyticus; ATCC 17802), Bacillus (Bacillus) cereus; ATCC 49953) Shigella flexneri (KCTC 2517) and E.
- KCTC Korean collection type culture
- the asymmetric isothermal amplification method showed that the specificity is superior to the symmetric isothermal amplification method.
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Abstract
Description
Claims (16)
- 다음의 단계를 포함하는 표적 DNA의 등온 증폭방법:(i) 표적 DNA, (ii) 상기 표적 DNA와 상보적인 염기서열을 가지는 외부 프라이머 세트, (iii) 상기 표적 DNA와 3' 말단 DNA 부분이 상보적이고 5' 말단 DNA-RNA 부분이 비상보적인 염기서열을 가지는 DNA-RNA-DNA 혼성 프라이머 세트 및 (iv) 상기 DNA-RNA-DNA 혼성 프라이머 세트의 정방향 프라이머와 역방향 프라이머의 비율이 한 쪽을 과량으로 사용하여 비대칭적으로 핵산이 증폭되는 세트 및 (v) 상기 외부 프라이머 세트와 혼성 프라이머 세트에 의해 생성되는 증폭산물과 상보적인 염기서열을 가지는 DNA-RNA-DNA 혼성 신호 프로브를 포함하는 반응혼합물에 사슬치환이 가능한 DNA 중합효소, RNA 분해효소를 첨가한 다음, 상기 표적 DNA와 상기 신호 프로브를 등온에서 동시에 증폭시키는 단계를 포함하는 표적 DNA의 등온 증폭방법 및 상기 증폭된 신호 프로브를 이용하는 것을 특징으로 하는 표적 DNA의 검출방법.
- 제1항에 있어서, 상기 외부 프라이머 세트는 올리고 DNA, 올리고 RNA 및 혼성 올리고 RNA/DNA로 구성된 군에서 선택되는 어느 하나인 것을 특징으로 하는 방법.
- 제1항에 있어서, 상기 DNA-RNA-DNA 혼성 프라이머 세트는 5' 말단 DNA-RNA 부분이 표적 DNA 서열과 비상보적인 염기서열을 가지고, 3' 말단 DNA 부분이 표적 DNA와 상보적인 염기서열을 갖는 것을 특징으로 하는 방법.
- 제1항에 있어서, 상기 DNA-RNA-DNA 혼성 프로브는 상기 DNA-RNA-DNA 프라이머 세트 중 과량으로 사용되는 프라이머에 의해 증폭된 산물과 상보적인 염기서열을 갖는 것을 특징으로 하는 방법.
- 제4항에 있어서, 상기 정방향 프라이머와 역방향 프라이머의 비율은 1:5부터 1:20까지 혹은 그 반대로 구성되는 비율을 갖는 것을 특징으로 하는 방법.
- 제1항에 있어서, 상기 DNA-RNA-DNA 혼성 프로브는 상기 DNA-RNA-DNA 프라이머 세트 중 과량으로 사용되는 프라이머에 의해 증폭된 산물과 상보적인 염기서열을 갖는 것을 특징으로 하는 방법.
- 제1항에 있어서, 상기 DNA 중합효소는 내열성 DNA 중합효소인 것을 특징으로 하는 방법.
- 제7항에 있어서, 상기 내열성 DNA 중합효소는 Bst DNA 중합효소, exo(-) vent DNA 중합효소, exo(-) Deep vent DNA 중합효소, exo(-) Pfu DNA 중합효소, Bca DNA 중합효소 및 파이 29 DNA 중합효소로 구성된 군에서 선택된 어느 하나인 것을 특징으로 하는 방법.
- 제1항에 있어서, 상기 RNA 분해효소는 RNase H인 것을 특징으로 하는 방법.
- 제1항에 있어서, 상기 DNA-RNA-DNA 혼성 프라이머는 32~66 염기로 이루어진 것을 특징으로 하는 방법.
- 제10항에 있어서, 상기 DNA-RNA-DNA 혼성 프라이머는 DNA 부분의 길이가 각각 15~30 염기로 이루어지고, RNA 부분은 길이가 1~6 염기로 이루어진 것을 특징으로 하는 방법.
- 제1항에 있어서, 상기 DNA-RNA-DNA 혼성 신호 프로브는 18~38 염기로 이루어진 것을 특징으로 하는 방법.
- 제12항에 있어서, 상기 DNA-RNA-DNA 혼성 신호 프로브는 DNA 부분의 길이가 각각 8~16 염기로 이루어지고, RNA 부분은 길이가 1~6 염기로 이루어진 것을 특징으로 하는 방법.
- 제1항에 있어서, 상기 DNA-RNA-DNA 혼성 신호 프로브는 말단이 표지 물질로 표지되어 있는 것을 특징으로 하는 방법.
- 제14항에 있어서, 상기 표지 물질은 형광물질 (fluorescence)과 형광신호 억제물질 (quencher)로 구성된 군에서 선택되는 것을 특징으로 하는 방법.
- 제1항에 있어서, 상기 등온증폭은 30~75℃에서 수행하는 것을 특징으로 하는 방법.
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- 2015-02-02 WO PCT/KR2015/001070 patent/WO2015126078A1/ko active Application Filing
- 2015-02-02 EP EP15752094.1A patent/EP3081653A4/en not_active Withdrawn
- 2015-02-02 JP JP2016545825A patent/JP2017501737A/ja active Pending
- 2015-02-02 CN CN201580004417.8A patent/CN105960467A/zh active Pending
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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KR101901749B1 (ko) | 2016-02-15 | 2018-09-28 | 주식회사 누리바이오 | 실시간 핵산 또는 단백질 검출용 단일핵산 및 이를 이용한 검출 방법 |
US11578357B2 (en) | 2016-12-16 | 2023-02-14 | Agilent Technologies, Inc. | Modified multiplex and multistep amplification reactions and reagents therefor |
KR20190043687A (ko) * | 2017-10-19 | 2019-04-29 | 경상대학교산학협력단 | 분자비콘을 포함하는 비브리오균의 등온비색 검출용 조성물 및 이의 용도 |
KR101987388B1 (ko) | 2017-10-19 | 2019-06-12 | 경상대학교산학협력단 | 분자비콘을 포함하는 비브리오균의 등온비색 검출용 조성물 및 이의 용도 |
CN110373452A (zh) * | 2019-07-05 | 2019-10-25 | 四川省丹丹郫县豆瓣集团股份有限公司 | 用于郫县豆瓣的致病微生物快速筛查方法 |
Also Published As
Publication number | Publication date |
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US20160348159A1 (en) | 2016-12-01 |
KR101589483B1 (ko) | 2016-01-28 |
EP3081653A1 (en) | 2016-10-19 |
EP3081653A4 (en) | 2017-06-28 |
JP2017501737A (ja) | 2017-01-19 |
KR20150098928A (ko) | 2015-08-31 |
CN105960467A (zh) | 2016-09-21 |
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