Real-time fluorescent nucleic acid isothermal amplification detection kit for treponema pallidum 16s RNA, and special primer and probe thereof
A technology for constant temperature amplification detection and Treponema pallidum, which is applied in the field of biomedical detection technology, can solve the problems of cross-contamination of samples in experimental environment, can not meet detection sensitivity, increase detection cost, etc., achieves reduction of infection risk, easy automation and detection. The effect of increased sensitivity
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Embodiment 1
[0054] Example 1: Design of special primers and probes for detection of Treponema pallidum 16s RNA by real-time fluorescent nucleic acid constant temperature amplification
[0055] According to the Treponema pallidum nucleic acid sequence published in the Genbank database, the present inventor selects and determines a highly conserved sequence on the Treponema pallidum 16s RNA that is quite different from other similar pathogens as the detection sequence (the nucleotide sequence corresponding to DNA is such as SEQ ID Shown in NO: 1), primers and probes were designed according to the principles of primers and probes design, so as to perform real-time fluorescent nucleic acid constant temperature amplification detection on Treponema pallidum.
[0056] This embodiment has designed multiple groups of primers and probes altogether, wherein selects following two groups of primers and probes (group 1 and group 2) to Treponema pallidum positive control (detailed below) and negative con...
Embodiment 2
[0076] Example 2: Real-time fluorescent nucleic acid constant temperature amplification detection kit for Treponema pallidum 16s RNA
[0077] The kit for detecting Treponema pallidum 16s RNA provided in this example is a kit for detecting Treponema pallidum 16s RNA based on the principle of RNA nucleic acid constant temperature synchronous amplification detection, and specifically includes the following components:
[0078] (1) Viral nucleic acid extraction solution: used to extract and purify the Treponema pallidum nucleic acid in the sample, which contains 250-800mM HEPES, 4-10% lithium dodecyl sulfate (LLS), and 1-50 μM specific capture probe (SEQ ID NO:2), 50-500mg / L magnetic beads, 25-150pmol / mL first primer (SEQ ID NO:3);
[0079] (2) Detection solution a: it contains 10-50mM Tris, 5-40mM KCl, 10-40mM MgCl 2 , 1-20mM NTP, 0.1-10mM dNTPs, 1-10% PVP40, 250-750pmol / mL of the second primer (SEQ ID NO:4);
[0080](3) Detection solution b: it contains 10-50mM Tris, 5-40mM KC...
Embodiment 3
[0087] Embodiment 3: Real-time fluorescence nucleic acid isothermal amplification method for detecting Treponema pallidum 16s RNA
[0088] The method of this embodiment detects Treponema pallidum 16s RNA based on the RNA constant temperature synchronous amplification detection principle, which uses the kit provided in the above-mentioned embodiment 2 to detect whether the sample contains Treponema pallidum nucleic acid, and the specific operation steps are:
[0089] 3.1. Sample preparation
[0090] Get 250 μ L Treponema pallidum 16s RNA positive control respectively (described in embodiment 1, concentration is 10 5 copies / mL), 250 μL of negative control and 250 μL of the sample to be tested were respectively placed in sample processing tubes for standby;
[0091] 3.2. Nucleic acid extraction
[0092] (1) Add 100 μL to 800 μL of viral nucleic acid extraction solution (HEPES 500 mM, LLS 8%, specific capture probe (SEQ ID NO: 2) 15 μM, magnetic beads 150 mg / L, first primer (SEQ...
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