Effect of long-chain non-coding RNA AP000344. 3 on the proliferation and invasion of human bladder cancer cells and its mechanism / 临床与实验病理学杂志

ABSTRACT

Purpose To investigate the effect of specific long-chain non-coding RNA AP000344. 3 on the proliferation and invasion of bladder cancer cells and its mechanism. Methods qRT-PCR was used to detect the expression of AP000344. 3 in bladder cancer cells and normal bladder epithelial cells. The cancer cells with the lowest expression rate were selected for subsequent experiments. The AP000344. 3 plasmid or the negative control plasmid was transferred into bladder cancer cells by Lipofectamine 2000, and the transfection efficiency of AP000344. 3 was detected by qRT-PCR. Cell proliferation activity was measured by MTT method,and cell invasion ability was detected by Transwell assay. Bioinformatics was used to predict downstream miRNA and downstream genes of AP000344. 3. qRT-PCR and Western blot were used to detect the expression of downstream genes. Results The expression of AP000344. 3 in bladder cancer cells was significantly lower than that in normal bladder epithelial cells (P < 0. 01) ,and the expression of AP000344. 3 was the lowest in BIU87 cells (P < 0. 01) . The expression of AP000344. 3 in BIU87 cells was up-regulated at 48 h after transfection with AP000344. 3 (P < 0. 01) . The proliferation activity of BIU87 cells was decreased (P < 0. 05) ,and the cell invasion ability was decreased (P < 0. 05) . AP000344. 3 can target and bind to miR-135a-5p,and miR-135a-5p to human chemokine-like factor superfamily member 3 (CMTM3) . After up-regulation of AP000344. 3,miR-135a-5p expression was down-regulated (P < 0. 01) ,and CMTM3 was up-regulated in mRNA and protein expression (P < 0. 01) . Conclusion AP000344. 3 is significantly down-regulated in bladder cancer cells,and up-regulation of AP000344. 3 can inhibit the proliferation and invasion of bladder cancer cells. The mechanism may be to inhibit the expression of miR-135a-5p and up-regulate the expression of CMTM3 protein,providing a theoretical basis for finding new therapeutic targets for bladder cancer.