Kit and method for multiple detection of ROS1 fusion gene mutation
A multiplex detection and kit technology, applied in the fields of biotechnology and tumor diagnosis, can solve the problems of cumbersome operations, sequence splicing burden, and insufficient high-throughput sequencing methods.
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Embodiment 1
[0111] The invention provides a method, primers, probes and kits for multiple gene fusion detection of lung cancer. The specific implementation steps are as follows:
[0112] (1) Extraction of nucleic acid templates from samples to be tested
[0113] Sun Yat-sen University Daan Gene Co., Ltd. nucleic acid extraction or purification reagent (Yue Sui Ji Bei 20170666), nucleic acid extraction was performed according to the kit instructions. The nucleic acid after tissue sample extraction is diluted to a concentration of 2-100ng / μL, and the purity should meet A 260 / A 280 The ratio ranges between 1.7-2.3. The template can be used directly for subsequent experiments or stored at -80°C for future use, avoiding repeated freezing and thawing.
[0114] (2) Sample addition
[0115] Take 3 μL of the RNase system and add it to the PCR reaction tube. Centrifuge briefly for 15s.
[0116] Take 5 μL of the negative quality control product, the sample nucleic acid template prepared in s...
Embodiment 2
[0132] Embodiment 2 Sensitivity and accuracy detection
[0133] The sensitivity reference product with a total nucleic acid concentration of 100ng / μL is composed of the detection gene locus plasmid or cell line, and the nucleic acid of the wild-type cell line is mixed in a certain proportion, and the 100ng / μL mixture contains 10 copies / μL of the fusion gene.
[0134] (1) Sample addition
[0135] Take 3 μL of the RNase system and add it to the PCR reaction tube. Centrifuge briefly for 15s.
[0136] Take 5 μL negative quality control substance, sensitivity reference substance (100 ng / μL total nucleic acid contains 10 copies / μL fusion gene), positive quality control substance, and add them to the reaction tube in sequence according to Table 5. Close the cap of the PCR reaction tube tightly, mix well, and centrifuge briefly for 10s.
[0137] For each sensitivity reference product, 5 repeated experiments.
[0138] (2) Real-time fluorescent PCR amplification:
[0139] Set the r...
Embodiment 3
[0147] Embodiment 3 clinical sample detection
[0148] Extraction of test sample nucleic acid:
[0149] (1) Extraction of nucleic acid templates from clinical samples to be tested
[0150] Collect 100 cases of clinically negative samples, the known SLC34A2-ROS1 (SLC34A2 Exon4; ROS1 Exon32), SLC34A2-ROS1 (SLC34A2 Exon4; ROS1 Exon34), SDC4-ROS1 (SDC4 Exon2; ROS1 Exon32), EZR-ROS1 (EZR Exon10; ROS1 Exon34), CD74-ROS1 (CD74 Exon6; ROS1 Exon32), CD74-ROS1 (CD74 Exon6; ROS1 Exon34) mutation clinical samples were randomly mixed in, Sun Yat-sen University Daan Gene Co., Ltd. nucleic acid extraction or purification reagents (tissue samples You can use Yuesui Machinery No. 20170666) to extract nucleic acid according to the kit instructions. The nucleic acid after tissue sample extraction is diluted to a concentration of 2-100ng / μL, and the purity should meet A 260 / A 280 The ratio ranges between 1.7-2.3. The template can be used directly for subsequent experiments or stored at -80°C...
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