Allglo probe-based detection method of anopheles sinensis knockdown resistance gene mutation site

The technology of a mutation site and detection method is applied in the detection of Anopheles sinensis knockdown resistance (kdr) gene mutation sites, and the field of fluorescence quantitative PCR detection of Anopheles sinensis knockdown resistance (kdr) gene mutation sites , which can solve the problems such as the need to improve the detection sensitivity and specificity, the complex synthesis of TaqMan probes, and the reduction of the test sensitivity and specificity, so as to reduce the background influence, improve the detection sensitivity and specificity, and improve the Tm value.

Inactive Publication Date: 2013-06-12
JIANGSU INST OF PARASITIC DISEASES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In 2011, Wu Song et al. reported the establishment of PCR detection method for knockdown resistance mutation of Anopheles sinensis (Wu Song, Ma Jian, Liu Qian et al. Establishment of PCR detection method for knockdown resistance mutation of Anopheles sinensis[J]. Journal of Comorbid Diseases, 2011, 27(11): 1008-1010); Chinese patents CN102373280A and CN102373282A respectively disclose a kind of Anopheles sinensis drug resistance AS-PCR detection kit and PCR-RFLP detection kit, but the above PCR method Need to open the cover to test the results, which is easy to cause cross-contamination and false positives. The result needs to be judged according to the strength of the electrophoresis band, which reduces the sensitivity and specificity of the test, and is easy to misjudgment and misjudgment. It is not conducive to the health of operators; Chinese patent CN102373281A discloses a TaqMan PCR detection kit for Anopheles sinensis drug resistance, but the synthesis of TaqMan probes is complicated and expensive, and it is necessary to use different TaqMan probe combinations in two tubes to perform fluorescence quantitative amplification respectively. The operation and detection procedures are cumbersome, and the detection sensitivity and specificity need to be improved; in addition, the above methods need to pre-extract Anopheles mosquito genome DNA as the amplification template, which is time-consuming, labor-intensive, low detection efficiency, and easy to contaminate
[0005] In the on-site vector monitoring, there is still a lack of high sensitivity and specificity, low cost, simple and fast detection method of kdr gene mutation of Anopheles sinensis and corresponding reagents and kits

Method used

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  • Allglo probe-based detection method of anopheles sinensis knockdown resistance gene mutation site
  • Allglo probe-based detection method of anopheles sinensis knockdown resistance gene mutation site
  • Allglo probe-based detection method of anopheles sinensis knockdown resistance gene mutation site

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Experimental program
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Embodiment 1

[0041] The design of embodiment 1 primer and probe

[0042] According to the Anopheles sinensis knockdown resistance (kdr) gene sequence (GenBank accession number GI84646709) and the L1014 site mutation, a pair of primers and three probes were designed with Primer Premier6.0: Primer 1 (upstream primer Primer-F ) and primer 2 (downstream primer Primer-R) nucleotide sequences are shown in SEQ ID NO: 1 and SEQ ID NO: 2, probe 1 (kdr-TTG), probe 2 (kdr-TTT) and probe 3 (kdr-TGT) nucleotide sequences are shown in SEQ ID NO: 3, SEQ ID NO: 4 and SEQ ID NO: 5. NEP gene markers, wherein the 7th base C and the 8th base T of the three probes are locked nucleotides. For the specific design regions of the above primers and probes, see figure 1 .

Embodiment 2

[0043] The design of embodiment 2 reaction system and condition

[0044] The invention adopts a triple probe detection method, that is, each reaction tube contains three probes kdr-TTG, kdr-TTT and kdr-TGT that can detect TTG, TTT and TGT.

[0045] Prepare the Allglo real-time fluorescent quantitative PCR reaction system: Roche Probe Master (2×) 5 μl, the final concentration of the upstream primer Primer-F and the downstream primer Primer-R is 500nM, the final concentration of the probes kdr-TTG, kdr-TTT and kdr-TGT is 400nM, Make up to 10 μl of sterilized water, one leg of Anopheles sinensis, and put it in LightCycler480 fluorescent quantitative eight-connected tube.

[0046] Determine the Allglo real-time fluorescent quantitative PCR reaction conditions: put the eight-tube tube in Roche Lightcycler480II for real-time fluorescent quantitative PCR amplification. The reaction conditions are set as follows: 95°C pre-denaturation for 5 minutes, 95°C denaturation for 15s, 60°C ann...

Embodiment 3

[0048] Embodiment 3 detection result judgment

[0049] Combined with the amplification curve to analyze and interpret the detection results.

[0050] Kdr genotype identification: identify specific genotypes based on the fluorescence quantitative amplification curves of different channels. When only the FAM channel has an amplification signal, the kdr gene does not contain a mutation site, and it is a TTG homozygous wild type; when only the VIC / HEX channel has an amplification signal, the kdr gene has a L1014F mutation site, which is a TTT homozygous mutation type; when only the CY5 channel has an amplification signal, the kdr gene has the L1014C mutation site, which is a TGT homozygous mutant type; when any two of the FAM, VIC / HEX and CY5 channels have amplification signals, the kdr gene is Mutants (wild mutant heterozygous or mutation heterozygous), that is, when both FAM and VIC / HEX channels have amplification signals, but CY5 channels have no amplification signals, the kdr...

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Abstract

The invention discloses an Allglo probe-based detection method of an anopheles sinensis knockdown resistance gene mutation site. A special primer provided by the invention consists of a primer 1 and a primer 2 shown in a SEQ ID No.1 and a SEQ ID No.2; a reagent consists of the special primer, a probe 1 (sequence SEQ ID No.3), a probe 2 (sequence SEQ ID No.4) and a probe 3 (sequence SEQ ID No.4); a reaction reagent consists of a reagent and an Allglo reaction buffer liquid; and a kit comprises the reaction reagent. The invention provides an efficient, rapid, simple and convenient anopheles sinensis kdr gene mutation site detecting method which is high in specificity and sensitivity, and according to the method, the anopheles sinensis kdr gene mutation type can be rapidly and accurately detected.

Description

technical field [0001] The invention belongs to the technical field of gene mutation detection, in particular to a detection method for anopheles sinensis knockdown resistance (kdr) gene mutation site, in particular to an Anopheles sinensis knockdown resistance (kdr) gene mutation site based on Allglo probe Fluorescent quantitative PCR detection method and kit. Background technique [0002] Anopheles sinensis is one of the main malaria vectors in my country. Recent reports indicate that the transmissibility of Anopheles sinensis in the central part of China has been greatly improved compared with the last century. Malaria outbreaks in central my country and the Huanghuai region are closely related. The use of insecticides to control Anopheles mosquitoes is a very important means of malaria prevention and control. Humans have used insecticides to control mosquitoes for more than 80 years. Since the early 1980s, pyrethroid insecticides have been used to treat mosquito nets and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12Q1/68C12N15/11
Inventor 曹俊白亮朱国鼎唐建霞周华云高琪
Owner JIANGSU INST OF PARASITIC DISEASES
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