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Primer group for amplifying pathogenic nucleic acid, construction method of pathogenic nucleic acid detection library and pathogenic detection method

A technology for amplifying primers and primer sets, which is applied in the field of pathogen detection, can solve problems such as expensive detection costs, complex operations, and insufficient detection throughput, and achieve the effects of reducing detection costs, simplifying technical processes, and improving detection throughput

Pending Publication Date: 2020-06-30
MGI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, Life provides a multiplex PCR amplification sequencing detection technology covering 12 bacteria and 18 drug-resistant genes. This technology has high detection sensitivity and is applicable to a wide range of sample types, but the detection cost is expensive
[0009] In summary, in the process of expanding the market for pathogenic microorganism typing detection, pathogenic microorganism identification and bacterial drug resistance monitoring, some of the existing technologies are expensive to detect and some are complicated to operate; and there are generally shortcomings such as insufficient detection throughput, which are not suitable for large-scale Crowd screening and testing are far from meeting the growing market testing needs

Method used

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  • Primer group for amplifying pathogenic nucleic acid, construction method of pathogenic nucleic acid detection library and pathogenic detection method
  • Primer group for amplifying pathogenic nucleic acid, construction method of pathogenic nucleic acid detection library and pathogenic detection method
  • Primer group for amplifying pathogenic nucleic acid, construction method of pathogenic nucleic acid detection library and pathogenic detection method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] Embodiment 1: the typing detection of pathogenic microorganism (HPV nucleic acid typing detection)

[0076] 1. Sample Preparation

[0077] Prepare 1000, 100, and 10 copies / microliter of national standard products for the L1 region of human papillomavirus nucleic acid, including HPV16, 18, 31, 33, 35, 39, 45, 51, 52, 56, 58, 59, 66, 68, 6, 11, 26, 53, 73, 82, and prepare 30 HPV clinical DNA samples with known HPV typing test results at the same time. A total of 90 cases of national standard products and HPV clinical DNA samples with different gradient concentrations.

[0078] 2. Multiplex PCR amplification

[0079] The prepared 90 samples and 6 blank controls were numbered sequentially, and 96 sets of forward primers and reverse primers with sample tag sequences were respectively amplified to obtain 96 multiplex PCR amplification products, such as image 3 shown.

[0080] It should be noted that different sample tag sequences are used for different DNA samples, and t...

Embodiment 2

[0117] Embodiment 2: the identification of pathogenic microorganism (HCV detects)

[0118] 1. Sample Preparation

[0119] Use the extraction reagent of the hepatitis C virus nucleic acid assay kit (PCR-fluorescent probe method) of Sun Yat-sen University Daan Gene Co., Ltd. to extract, according to the instructions provided by the manufacturer, from 48 cases of serum with known HCV detection results Template RNA was extracted from samples, and HCV clinical serum samples were provided by Tianjin Huada Clinical Inspection Center Co., Ltd.

[0120] 2. Reverse transcription reaction

[0121] The prepared 48 samples were numbered sequentially, and the cDNA of the samples was obtained by using the MMLV reverse transcriptase of Treasure Bioengineering (Dalian) Co., Ltd. and adding random primers (N8, see Table 13) for reverse transcription reaction.

[0122] The reverse transcription reaction system is 20 microliters, and its composition is shown in Table 11 below:

[0123] Table 1...

Embodiment 3

[0160] Embodiment 3: Bacterial drug resistance gene monitoring (Escherichia coli drug resistance gene detection)

[0161] 1. Sample Preparation

[0162] This implementation case uses mutant E. coli strains (ATCC43888) and wild-type E. coli strains (ATCC8739) from the China Food and Drug Control Institute, wherein the mutant E. coli strains include caiC807, flhA1281, hybA612, valS528, valS1317, valS1356, valS1368 , valS1389, yafE227, and yedK1323, a total of 10 mutation sites, were extracted using the nucleic acid purification kit produced by Huada Biotechnology (Wuhan) Co., Ltd., and operated in strict accordance with the instructions provided by the manufacturer. Use Qubit3.0 to measure the concentration of DNA samples, and then use TE buffer to dilute to 7000 and 5000 copies / microliter respectively. Then the mutant E. coli strain (ATCC43888) and the wild-type E. coli strain (ATCC8739) at the same concentration were respectively 1:0, 3:1, 1:1, 1:3, 1:9, 1:20, 1: 99. Mix at ...

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Abstract

The invention relates to a primer group for amplifying pathogenic nucleic acid, a construction method of a pathogenic nucleic acid detection library and a pathogenic detection method. The primer groupcomprises at least one pair of multiple amplification primers, and the multiple amplification primers comprise a forward primer and a reverse primer, wherein the structure of each of the forward primer and the reverse primer comprises a universal primer amplification structure sequence, a sample label sequence and a pathogenic nucleic acid specific binding sequence. The universal primer amplification structure sequence is used for amplifying a universal primer, the sample label sequence is used for identifying the source of a sample, and the pathogenic nucleic acid specific binding sequence is used for specifically binding the target region of a pathogenic nucleic acid. According to the invention, a multiple amplification technology is adopted to enrich a target gene sequence of the pathogenic nucleic acid; the source of the sample can be determined by connecting the sample label sequence with the sample; and meanwhile, library preparation by mixing a plurality of samples together isrealized to improve the detection flux.

Description

technical field [0001] The invention relates to the technical field of pathogen detection, in particular to a primer set for amplification of pathogenic nucleic acid, a method for constructing a pathogenic nucleic acid detection library, and a pathogen detection method. Background technique [0002] With the advancement of high-throughput sequencing technology, sequencing service objects and application segments continue to expand, and the market size of high-throughput sequencing continues to increase. High-throughput sequencing technology has entered into rapid development in the detection of pathogenic microorganism typing, pathogenic microorganism identification and bacterial drug resistance monitoring, and has broad application prospects. [0003] (1) Type detection of pathogenic microorganisms, such as human papillomavirus nucleic acid type detection. Cervical cancer is the second most common cancer in women worldwide, and its incidence is mainly related to the persis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12Q1/70C12Q1/689C12Q1/6895C12Q1/6869C12Q1/04C12N15/11C40B50/06
CPCC12Q1/701C12Q1/689C12Q1/6895C12Q1/6869C40B50/06C12Q2600/16C12Q2535/122C12Q2537/165
Inventor 邹婧欧日晶聂自豪万纯
Owner MGI TECH CO LTD
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