WO2012145861A1 - 核酸液相提取及检测方法 - Google Patents
核酸液相提取及检测方法 Download PDFInfo
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- WO2012145861A1 WO2012145861A1 PCT/CN2011/000746 CN2011000746W WO2012145861A1 WO 2012145861 A1 WO2012145861 A1 WO 2012145861A1 CN 2011000746 W CN2011000746 W CN 2011000746W WO 2012145861 A1 WO2012145861 A1 WO 2012145861A1
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- Prior art keywords
- nucleic acid
- sample
- biological sample
- kpa
- biological
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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
- C12Q1/6806—Preparing nucleic acids for analysis, e.g. for polymerase chain reaction [PCR] assay
Definitions
- the present invention relates to the extraction and detection of nucleic acids, and more particularly to a method for the release and detection of nucleic acids from a liquid phase in a biological sample using high pressure heating. Background technique
- the role of genetic testing in modern clinical medicine is increasingly important.
- the first step in genetic testing is to extract nucleic acids from fixed or unfixed biological samples.
- cells or tissues are usually digested with an enzyme, and then extracted with an organic solvent, and the separated nucleic acid is precipitated by alcohol or isopropanol, collected, and concentrated in water.
- the entire process takes 2-3 days.
- paraffin-embedded tissues require multiple steps such as decarburization of diphenylbenzene and long-term digestion of high-concentration proteases. The disadvantages of low-aging are more prominent.
- nucleic acid extraction technology With the rising status of genetic testing, nucleic acid extraction technology has not been synchronized with innovations and breakthroughs in comparison with emerging new methods and technologies for gene detection. The availability of qualified nucleic acid samples has become the key to the success of genetic testing. In particular, it is highly dependent on genotyping analysis or diagnosis of paraffin-embedded tissues. Summary of the invention
- the present invention provides a method for extracting a nucleic acid analyte solution from a biological sample, comprising the steps of: placing the biological sample in a heating vessel; optionally, adding a dissolution medium to the biological sample; High pressure heating; optionally, centrifuging the biological sample; and obtaining a liquid comprising the nucleic acid analyte.
- the method of the invention is particularly useful for extracting nucleic acids from formalin-fixed paraffin-embedded tissues.
- the method performs dewaxing of paraffin-embedded tissues, decomposes tissue cells, de-crosslinks, etc., by one-step high-pressure heating, until the liquid phase releases nucleic acids.
- the invention also provides a method of detecting a nucleic acid analyte in a biological sample, comprising obtaining a solution of the nucleic acid analyte according to the method of the invention, and The nucleic acid analyte is detected, preferably by polymerase chain reaction (PCR).
- PCR polymerase chain reaction
- the method of the invention is simple to operate (for example, the currently used nucleic acid extraction kit requires more than 20 steps), the speed is fast, the cost is low, special equipment and reagents are not needed, the simple operation method is easy to grasp, and the preparation of the nucleic acid solution is greatly improved. And the efficiency of detection.
- Figure 1A shows the 12-codon point mutation (G12S) of K-ras exon 2, 5' ⁇ 3';
- Figure 1 B shows the reverse sequencing results of the same specimen (3, ⁇ 5, ).
- the arrow indicates the mutation site.
- Figure 2 shows the normal sequence of the 12, 13 codons of human colorectal cancer K-ms exon 2.
- Figure 3 shows the results of fluorescent PCR of Candida albicans.
- the ordinate is the amount of fluorescence
- the abscissa is the number of PCR cycles, and the two curves are positive.
- Figure 4 shows the results of electrophoresis of human serum HBV virus 575, 241, 192 bp HBV specific fragments.
- Figure 5 shows an electropherogram showing: [1] paraffin-embedded tissue of human gastrointestinal stromal tumor; [2] paraffin-embedded tissue of human colorectal cancer; [3] lOObp marker; [4] fresh Sickle adenocarcinoma tissue;
- Figure 6 shows a comparison of saturated steam temperature versus pressure.
- the invention provides a method for extracting a nucleic acid analyte solution from a biological sample, comprising the steps of: placing the biological sample in a heating vessel; optionally, adding a dissolution medium to the biological sample; The sample is subjected to high pressure heating; optionally, the biological sample is centrifuged; and a liquid containing the nucleic acid analyte is obtained.
- the nucleic acid analyte solution can generally be used directly for subsequent detection, such as PCR. This greatly simplifies the steps of nucleic acid extraction.
- nucleic acid analyte refers to a target nucleic acid molecule to be analyzed, including DNA and RNA.
- the nucleic acid to be analyzed in the sample is a housekeeping gene, the amount of nucleic acid in the obtained solution is also high due to the large number of copies, which facilitates subsequent PCR detection.
- the nucleic acid solution can be obtained by the method of the present invention and further concentrated, for example, by concentration on a chromatography column to increase the nucleic acid concentration.
- optionalal as used herein means “optional” or “non-essential”. "Optionally, centrifuging the sample” means that the centrifugation may or may not be performed, which may be selected by those skilled in the art depending on the circumstances.
- high pressure refers to a higher pressure than standard atmospheric pressure.
- the sea level pressure is one atmosphere, which is equivalent to approximately 101.3 kPa.
- the "high pressure" in the present invention can be achieved by a high-pressure apparatus commonly used in the art, such as a pressure cooker, an electric pressure cooker, a high pressure steam sterilizer, and the like.
- the most commonly used high pressure equipment is steam heating equipment. It is well known in the art that the temperature at high pressure heating is generally higher than the temperature at atmospheric pressure. There are various methods in the art for estimating the correspondence between pressure and temperature during high pressure heating (see, for example, the "Saturation Steam Temperature vs. Pressure Comparison Table" shown in Figure 6). The approximate temperature at the time of high pressure heating can be roughly estimated from these methods. For example, when the pressure of a steam pressure cooker is 250 kPa, the temperature is about 127 °C.
- the "high pressure" in the present invention is usually above 105 kPa, for example, 1 10 kPa and 1 15 kPa.
- the upper limit of the pressure of a commonly used steam pressure cooker is about 350 kPa.
- the "high pressure" employed in the process of the invention may be between 105 and 350 kPa, such as from 1 to 10 kPa, especially from 1 to 15 kPa, preferably from 120 to 200 kPa.
- Different biological samples have different tolerances to temperature and pressure.
- Those skilled in the art can optimize the most suitable high pressure temperature and time by routine experiment according to the nature of the sample to be tested. For example, when the sample is easily broken (e.g., a tumor or a virus sample), the heating pressure and time can be appropriately lowered; when the biological sample is difficult to be broken (e.g., Candida albicans), the heating pressure and time can be appropriately increased.
- the heating time can be in the range of 5-210 minutes, for example 10-90 minutes, and the most common heating time is 20-60 minutes.
- a longer heating time e.g., 4 hours, may be employed.
- typical heating conditions can be: Pressure 140-170 kPa for 25-45 minutes.
- typical heating conditions can be: Pressure 140-170 kPa, maintained for 45-60 minutes.
- biological sample refers to a sample of a biological material to be tested containing nucleic acid, including biological samples from animals, plants, microorganisms or humans.
- Biological samples can be fresh, frozen or fixed in various samples, such as human tissue biopsy samples, tumor samples, Formalin-fixed paraffin-embedded tissue samples, as well as microbial samples of bacteria, fungi, viruses, mycoplasma, etc.
- Common fresh biological samples include: biological fluid samples such as blood, serum, tissue fluid, urine, stool, sputum, cerebrospinal fluid, saliva, tears, nipple aspirate, and cultured cells; tumor samples, such as from a subject Remove the diseased tissue and so on.
- a typical immobilized biological sample is a 10% formalin fixed paraffin embedded tissue.
- the method of the invention is particularly suitable for paraffin-embedded tissue samples, including longer-term retention wax blocks and sections.
- the sample When the biological sample is heated, the sample can be placed in a heating container.
- heating vessels include centrifuge tubes and test tubes, such as capped centrifuge tubes having a capacity of 1.5 mL or 10 mL, preferably with holes in the tube cap to prevent gas expansion during high pressure heating and collapse of the tube cap. It is also possible to place the sample in a conical flask or flask in a gauze seal, or in a gas permeable container.
- an optional dissolution medium can be added to the biological sample, as appropriate.
- a 0.1 M NaOH solution such as 200 ⁇ M or lml may be added to completely immerse the sample in the liquid prior to heating the paraffin-embedded tissue sections.
- Commonly used dissolution media include water, DEPC treated water, physiological saline, alkaline solutions, buffers, and the like.
- Commonly used buffers include Tris-HCl buffer, phosphate buffer, acetic acid-sodium acetate buffer, glycine-hydrochloric acid buffer, disodium hydrogen phosphate-sodium citrate buffer solution, and citric acid-sodium citrate buffer solution. . It will be understood by those skilled in the art that when the biological sample itself already contains a large amount of liquid (e.g., cerebrospinal fluid), no additional dissolution medium may be added.
- the sample can optionally be centrifuged to obtain a supernatant.
- Nucleic acids are usually dissolved in the supernatant and can be used directly in subsequent operations, such as PCR.
- the centrifugation step is not required and that centrifugation may not be necessary when the nucleic acid solution is not centrifuged for subsequent experiments (e.g., PCR).
- the method comprises the following steps: Optionally, the tube of the centrifuge tube is covered; the paraffin-embedded tissue section (for example, 1-2 pieces) is placed in a centrifuge tube, and pure water or An alkaline solution (such as a NaOH solution) is used to immerse the sample in the liquid; the sample is heated at a pressure of 140-200 kPa for 25-45 minutes; and the sample is centrifuged to obtain a supernatant. This supernatant can be used directly for subsequent PCR reactions.
- An alkaline solution such as a NaOH solution
- Another aspect of the invention provides a method of detecting a nucleic acid analyte in a biological sample comprising obtaining a solution of the nucleic acid analyte according to the method described above, and detecting the nucleic acid analyte.
- the detection is carried out by polymerase chain reaction (PCR).
- PCR polymerase chain reaction
- High pressure High pressure heating 30-45 minutes (Liren brand electric pressure cooker, model DYG-5B, working pressure 140-170 kPa, pressure limiting pressure 200 kPa.
- PCR Immediately after the high pressure is completed (13,000 rpm, 5 minutes), no need to cool. Take the supernatant 1-2 ⁇ 1 (or 1 : 10 diluted supernatant 1-2 ⁇ 1) and perform PCR according to the reagent instructions.
- Electrophoresis Electrophoresis detection of PCR products. If the amount of the product is too small, nested PCR can be performed.
- test results show that the nucleic acid samples obtained from paraffin-embedded tissue samples can meet the requirements of direct sequencing of PCR products by high-pressure heating method.
- Example 2 Human colorectal cancer (laser microdissected tumor cells) K-ras exon2 gene detection
- Example 2 A few microscopically cut paraffin sections of tumor cells were taken, and the procedure of Example 1 was carried out (e.g., few cells were used to reduce the amount of solution), and the supernatant was taken for PCR.
- the sequencing results of the PCR products are shown in Figure 2.
- the results of _h indicate that the high-pressure heating method of the present invention is suitable for obtaining a reliable nucleic acid for genotyping analysis and diagnosis from a small amount of cells. Increasing the success rate of genotyping and diagnosis of microscopic cells or tissues (such as fine needle ablation of tumor tissue) is of great significance for patients with tumors who have lost their chance of surgery.
- Example 3 Paraffin-embedded tissue Mycobacterium tuberculosis nucleic acid amplification assay
- a human lesion swab suspected of Candida albicans infection was eluted in a 200 ⁇ l 0.1 M NaOH (pH l l) solution, and the operation was carried out in substantially the same manner as in Example 1, wherein the heating time was 35-50 minutes.
- the supernatant is used for fluorescent PCR (increasing the fluorescent probe in the PCR master mix). The results are shown in Figure 3.
- Candida albicans is a family of fungi that is several to several times larger than bacteria.
- the cell wall is very thick, and the general method is difficult to lyse coating during the experiment, thus affecting the sensitivity of PCR.
- the infection of fungi has increased significantly, which is related to the abuse of antibiotics causing dysbacteriosis and the application of hormones and anticancer drugs leading to low immunity.
- Pathogenic fungi contain many types, and their resistance is different. It is more accurate to distinguish fungal types from gene sequences.
- the serum of 5 ⁇ l HBV patient was mixed with 200 ⁇ l of 0.1 M NaOH (pH 1 1) solution, and the same procedure as in Example 1 was carried out, wherein the heating time was 25-40 minutes, and the supernatant was taken for PCR.
- the electrophoresis results are shown in Figure 4.
- Example 6 Detection of rtiRNA in fresh tissue, paraffin-embedded tissue, and cultured cells
- Heating time 30-45 minutes working pressure is 140-170 kPa, pressure limiting pressure is 200 kPa.
- Reverse transcription (When extracting RNA, it is necessary to apply high pressure and prepare reverse transcription premix in advance.) When the high pressure is over, after centrifugation, open the tube cap and rapidly reverse the 2-5 ⁇ 1 supernatant. To prevent rapid degradation of RNA.
- Reverse transcription master mix IX reverse transcription buffer, 0.2 mM dNTPs, 0 ⁇ g of the primer (or 0. 2 ⁇ specific primer), 50 U M-mLV reverse transcriptase, 0.01 M DTT, plus DEPC water to 20 ⁇ l.
- PCR After reverse transcription (transient centrifugation), take supernatant 1-5 ⁇ 1 and add to PCR premix (containing lXPCRbuffer, 0.2mMdNTPs, 0.4-0.5 ⁇ specific primer, add water to 25-50 ⁇ 1.) : 94 ° C 1 minute 30 seconds, (94 ° C 30 seconds 55 ° C 30 seconds 72 ° C 20 seconds, 30-35 cycles) 72 ° C 2 minutes.
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Description
Claims
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2834113A CA2834113C (en) | 2011-04-27 | 2011-04-27 | Methods of nucleic acid liquid-phase extraction and detection |
| PCT/CN2011/000746 WO2012145861A1 (zh) | 2011-04-27 | 2011-04-27 | 核酸液相提取及检测方法 |
| CN201180049214.2A CN103492567A (zh) | 2011-04-27 | 2011-04-27 | 核酸液相提取及检测方法 |
| JP2014506706A JP2014512190A (ja) | 2011-04-27 | 2011-04-27 | 核酸の液相抽出方法とその検出方法 |
| CN201910524277.7A CN110257477A (zh) | 2011-04-27 | 2011-04-27 | 核酸液相提取及检测方法 |
| DE112011105191.3T DE112011105191B4 (de) | 2011-04-27 | 2011-04-27 | Verfahren zur Flüssigphasen-Extraktion und zum Nachweis von Nukleinsäuren |
| US14/113,244 US9487820B2 (en) | 2011-04-27 | 2011-04-27 | Methods of nucleic acid liquid-phase extraction and detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2011/000746 WO2012145861A1 (zh) | 2011-04-27 | 2011-04-27 | 核酸液相提取及检测方法 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2012145861A1 true WO2012145861A1 (zh) | 2012-11-01 |
Family
ID=47071532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2011/000746 Ceased WO2012145861A1 (zh) | 2011-04-27 | 2011-04-27 | 核酸液相提取及检测方法 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US9487820B2 (zh) |
| JP (1) | JP2014512190A (zh) |
| CN (2) | CN110257477A (zh) |
| CA (1) | CA2834113C (zh) |
| DE (1) | DE112011105191B4 (zh) |
| WO (1) | WO2012145861A1 (zh) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112805388A (zh) * | 2018-10-09 | 2021-05-14 | 公益财团法人筑波医疗中心 | 微生物的检测方法 |
| WO2022158402A1 (ja) * | 2021-01-25 | 2022-07-28 | 横河電機株式会社 | 核酸配列計測方法 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05192147A (ja) * | 1991-11-15 | 1993-08-03 | Kirin Bibaretsuji Kk | Dna塩基配列の特定方法 |
| US6111096A (en) * | 1997-10-31 | 2000-08-29 | Bbi Bioseq, Inc. | Nucleic acid isolation and purification |
| DE60328523D1 (de) * | 2002-12-17 | 2009-09-03 | Arkray Inc | Mikroorganismus- oder zellsammelverfahren und für das verfahren verwendetes mikroorganismus- oder zellensammelgerät |
| JP2009125033A (ja) * | 2007-11-27 | 2009-06-11 | Konica Minolta Medical & Graphic Inc | 核酸単離方法、核酸抽出装置、及びそれらを用いた細胞種の同定方法及び遺伝子検出方法 |
| JP2010158190A (ja) * | 2009-01-07 | 2010-07-22 | Hitachi High-Technologies Corp | 核酸回収方法及び核酸回収装置 |
| JP5624487B2 (ja) * | 2011-01-31 | 2014-11-12 | 横河電機株式会社 | 核酸抽出方法 |
-
2011
- 2011-04-27 CN CN201910524277.7A patent/CN110257477A/zh active Pending
- 2011-04-27 JP JP2014506706A patent/JP2014512190A/ja active Pending
- 2011-04-27 DE DE112011105191.3T patent/DE112011105191B4/de active Active
- 2011-04-27 WO PCT/CN2011/000746 patent/WO2012145861A1/zh not_active Ceased
- 2011-04-27 CA CA2834113A patent/CA2834113C/en active Active
- 2011-04-27 CN CN201180049214.2A patent/CN103492567A/zh active Pending
- 2011-04-27 US US14/113,244 patent/US9487820B2/en active Active
Non-Patent Citations (3)
| Title |
|---|
| SHI SR ET AL.: "DNA extraction from archival formalin-fixed, paraffin-embedded tissue sections based on the antigen retrieval principle: heating under the influence of PH.", J HISTOCHEM CYTOCHEM., vol. 50, no. 8, August 2002 (2002-08-01), pages 1005 - 1011 * |
| TIAN, ZIQIANG ET AL.: "Comparison of three methods of DNA extraction from formaldehyde-fixed, paraffin-embedded tissues.", BASIC MEDICAL SCIENCES AND CLINICS., vol. 24, no. 3, 2004, pages 335 - 338 * |
| WANG, ZHONGFA.: "Development and application of an ultra-fast DNA extraction method of pathogenic microorganism.", CHINESE JOURNAL OF HEALTH LABORATORY TECHNOLOGY., vol. 19, no. 9, September 2009 (2009-09-01), pages 1979 - 1981 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US9487820B2 (en) | 2016-11-08 |
| DE112011105191T5 (de) | 2014-02-13 |
| CN103492567A (zh) | 2014-01-01 |
| US20140087388A1 (en) | 2014-03-27 |
| CA2834113C (en) | 2017-11-21 |
| CN110257477A (zh) | 2019-09-20 |
| CA2834113A1 (en) | 2012-11-01 |
| DE112011105191B4 (de) | 2016-04-07 |
| JP2014512190A (ja) | 2014-05-22 |
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