Primer set, kit and detection method for rapid detection of carbapenemase genes

A carbapenemase and primer set technology, applied in biochemical equipment and methods, recombinant DNA technology, resistance to vector-borne diseases, etc., can solve the problem of not detecting genes at the same time, and shorten the detection time and save the detection. Cost and effect of fully closed reaction process

Pending Publication Date: 2020-07-24
GENERAL HOSPITAL OF NUCLEAR IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, there is no kit for the direct detection of carbapenemase using molecular beacon t

Method used

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  • Primer set, kit and detection method for rapid detection of carbapenemase genes
  • Primer set, kit and detection method for rapid detection of carbapenemase genes
  • Primer set, kit and detection method for rapid detection of carbapenemase genes

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0047] Example 1

[0048] Composition and detection method of a kit for rapid detection of carbapenemase gene

[0049] 1. The composition of the kit

[0050] (1) Primer set: Amplification primer pairs and molecular beacon probes for detecting Enterobacter carbapenemase resistance genes KPC, NDM, OXA48, VIM and IMP;

[0051] Among them, the primer set of KPC gene is:

[0052] KPC-F (SEQ ID NO:1): CAGCTCATTCAAGGGCTTTC;

[0053] KPC-R (SEQ ID NO: 2): CGTCATGCCTGTTGTCAGAT;

[0054] Molecular beacon probe KPC-probe (SEQ ID NO: 3): cgcgaACACACCCATCCGTTACGGCA tcgcg;

[0055] The primer set of NDM gene is:

[0056] NDM-F (SEQ ID NO: 4): ATATCACGTTGGGATCGAC;

[0057] NDM-R (SEQ ID NO: 5): TAGTGCTCAGTGTCGGCATC;

[0058] Molecular beacon probe NDM-probe (SEQ ID NO: 6): cgcgaGCCTGATCAAGGACAGCAAGG tcgcg;

[0059] The primer set of OXA48 gene is:

[0060] OXA48-F (SEQ ID NO: 7): GTGGCATCGATTATCGGAAT;

[0061] OXA48-R (SEQ ID NO: 8): AGAGCACAACTACGCCCTGT;

[0062] Molecular beacon probe OXA48-probe (SEQ ID NO: ...

Example Embodiment

[0081] Example 2

[0082] Method for rapidly detecting carbapenemase gene using the kit described in Example 1

[0083] 1. Sample

[0084] The CRE strain of Klebsiella pneumoniae ST11 was isolated from random collection of clinical samples, and then the isolated CRE strains were cultured at 37°C for 24 hours, and then the DNA was extracted using the method described in Example 1. The specific primers of the Enterobacter carbapenemase resistance genes KPC, NDM, OXA48, VIM and IMP were screened by PCR and sequenced to identify the corresponding positive samples, and then a single carbapenemase resistance gene KPC, DNA samples of NDM, OXA48, VIM and IMP were mixed to produce DNA samples containing five common enterobacteria carbapenemase resistance genes KPC, NDM, OXA48, VIM and IMP. The clinical sample used in this embodiment is a blood sample, but it is not limited to this. In addition, respiratory tract samples such as urine and sputum containing the CRE strain of Klebsiella pneumo...

Example Embodiment

[0089] Example 3

[0090] Sensitivity analysis of constant temperature amplification melting curve detection kit for CRE strains isolated from clinical samples based on molecular beacon technology

[0091] 1. Method

[0092] Sample processing: The CRE strain of Klebsiella pneumoniae ST11 isolated from clinical samples is adjusted to 1.8×10 with normal saline 8 CFU / mL, then perform a gradient dilution (dilute by 100μL bacterial solution + 900μL physiological saline), then centrifuge at 10000rpm, discard the supernatant, and then break it on a shaker for 10 minutes, take 300μL of the supernatant and add To the 96 deep well plate, extract the DNA on the nucleic acid extractor to 1.5×10 7 CFU / mL-1.5×10 2 DNA extracted from CFU / mL bacterial solution was used as a template, and each concentration gradient was 5μL for amplification.

[0093] 2. Use the detection method described in Example 1 for detection. After the reaction is completed, observe the melting curve peak Tm value, analyze the...

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Abstract

The invention discloses a primer set, kit and detection method for rapid detection of carbapenemase genes. The primer set includes amplification primer pairs and molecular beacon probes for detectingenterobacter carbapenemase drug resistance genes KPC, NDM, OXA48, VIM and IMP, and nucleotide sequences are as shown in SEQ ID NO: 1-SEQ ID NO: 15. The kit disclosed in the invention only needs one sample addition, one reaction tube and one reaction system to complete the detection of the five common carbapenemase drug resistance genes of enterobacter within 2 h, has the advantages such as rapidity, high-efficiency and accuracy, greatly shortens detection time, saves detection cost, and improves detection efficiency. Moreover, compared with the existing probe method multiple PCR, the kit reduces primer design and interference between primers, and thereby can reduce the occurrence of false positives/false negatives.

Description

technical field [0001] The invention relates to the technical field of nucleic acid detection, in particular to a primer set, a kit and a detection method for rapidly detecting carbapenemase genes. Background technique [0002] Bacterial drug resistance has become a global concern, and infection caused by drug-resistant bacteria has become a new challenge for clinical anti-infective treatment and a major threat to human health and life. Enterobacteriaceae bacteria are widely distributed and closely related to humans, and Enterobacteriaceae are important nosocomial infection bacteria. Carbapenem antibiotics are the main antibiotics for the treatment of Enterobacteriaceae infection. The extensive use of the drug, carbapenem-resistant Enterobacteriaceae (Carbapenem resistant Enterobacteriaceae, CRE) appeared clinically. At present, the common carbapenemase resistance genes in clinic mainly include KPC, NDM, OXA48, VIM and IMP. Although there are related kits for the detection...

Claims

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Application Information

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IPC IPC(8): C12Q1/689C12Q1/6851C12N15/11
CPCC12Q1/689C12Q1/6851C12Q2600/106C12Q2600/16C12Q2531/113C12Q2537/143C12Q2563/107Y02A50/30
Inventor 杜鸿张海方张碧颖朱志宸闻奕丞
Owner GENERAL HOSPITAL OF NUCLEAR IND
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