Application of miRNA (micro-ribonucleic acid) composition to preparing non-small cell lung cancer resisting medicines
A composition and anti-tumor drug technology, applied in the field of genetic engineering, can solve problems such as low survival rate, easy drug resistance of patients, loss of surgery opportunities, etc., and achieve the effect of promoting normalization
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[0033] The preparation method of pre-miR-1: 1. The pre-miR-1 sequence (pUC57-Simple-pre-miR-1) was synthesized by Nanjing Kaiji Biotechnology Development Co., Ltd. The target vector pYr-mir30-shRNA-2 was purchased from Changsha Yingrun Biotechnology Co., Ltd.; 2. The pre-miR-1 fragment was cloned into the pYr-mir30-shRNA-2 vector; 3. The clone was confirmed by sequencing; 4. Plasmid extraction.
[0034] The preparation method of pre-miR-206 is the same as that of pre-miR-1.
[0035] anti-miR-31 is an artificially synthesized miR-31 repressor that inhibits the expression of endogenous mature miR-31), and pre-miR-1, pre- The co-transfection of miR-206 and anti-miR-31 into A549 and H460 cells simultaneously up-regulated the expression of miR-1, miR-206 and down-regulated the expression of miR31.
Embodiment 1
[0037] 1. Differential expression of miRNAs in non-small cell lung cancer tumor-associated fibroblasts and normal fibroblasts
[0038] (1): Gene chip detection of miRNA expression levels in tumor-associated fibroblasts (CAF) and paired normal fibroblasts (NF) of 3 patients with non-small cell lung cancer;
[0039] 1. Chip preparation and analysis: According to the requirements of LC Sciences in the United States, lung cancer cell samples were prepared, and the chip was prepared by LC Sciences, and SangermiRBaseV10.0 version completed the chip analysis.
[0040] 2. Chip results: the experimental data comes from LCSciences, and the results are as follows: figure 1 shown.
[0041] 3. Analysis of the results: Compared with NF, the down-regulation of miR-1 / miR-206 was the most obvious in CAF; the up-regulation of miR-31 was the most obvious.
[0042] (2) qRT-PCR analysis of the expression levels of miR-1, miR-206 and miR-31 in tumor-associated fibroblasts (CAF) and paired normal ...
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