Primer, probe and assay kit for detecting v-ros avian UR2 sarcoma viral oncogene homolog 1 (ROS1) gene fusion mutation
A detection kit, the technology of the kit, which is applied in the determination/inspection of microorganisms, biochemical equipment and methods, DNA/RNA fragments, etc., can solve the problem of no ROS1 fusion gene mutation, unsatisfactory direct sequencing method, and low direct sequencing sensitivity and other problems, to achieve the effects of cheap detection, fast detection, and wide clinical application.
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Embodiment 1
[0064] Using the system of the present invention to detect plasmids, experimental plasmid templates (containing ROS1 fusion), the method of utilizing the above-mentioned fluorescent PCR to detect ROS1 gene fusion mutations is as follows:
[0065] (1) Plasmid treatment and extraction:
[0066] Plasmids were extracted using a plasmid extraction kit from TIANGEN (HighPure Plasmid Kit, DP116), and the specific extraction steps were performed according to the instructions of the kit. The extracted DNA was dissolved in Tris-HCl (10mmol / L, PH8.0), and the quality of the extraction was detected by a UV spectrophotometer to determine its concentration, and then the DNA concentration was adjusted to 2ng / μL was used as a PCR template, and 5 μL was used for PCR reaction amplification.
[0067] (2) Establish a PCR amplification reaction system:
[0068] Use the cDNA template obtained above as a template for real-time fluorescent PCR amplification, and perform PCR amplification according ...
Embodiment 2
[0078] Using the present invention to detect clinical paraffin-embedded tissue samples of lung cancer, 4 cases of ROS1 fusion positive and 11 cases of ROS1 wild-type samples determined by direct sequencing method were taken, and the ROS1 of 15 cases of clinical samples were detected by using the specific primer and probe fluorescent PCR system of the present invention The fusion gene mutation steps are as follows:
[0079] (1) Sample processing and RNA extraction:
[0080] (a) Take each of the above lung cancer samples, add 1ml of xylene, mix well, centrifuge at 14000RPM for 2min at room temperature, discard the supernatant, add 1ml of absolute ethanol to the pellet, shake and mix (remove xylene), 14000RPM at room temperature Centrifuge for 2 minutes to discard the supernatant, open the cap of the centrifuge tube, and dry at 37°C;
[0081] (b) Add 150 μl Buffer PKD and 10 μl proteinase K to the centrifuge tube, shake and mix, incubate at 56°C for 15 minutes, and incubate at 8...
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