[Study on effects of microRNA-21 antisense oligonucleotide in vivo and in vitro on bionomics of human cervical squamous carcinoma cell lines SiHa].

Abstract To explore the effect of microRNA-21 (miR-21) antisense oligonucleotide on the biological characteristics of human cervical squamous carcinoma cell lines SiHa in vivo and in vitro. Specific phosphorothioate antisense oligodeoxynucleotides targeting miR-21 were synthesized and transfected into cervical cancer cells in vitro. Expression of miR-21 in SiHa after transfection was detected by real-time RT-PCR. The cell proliferation was evaluated by MTT assay and colony formation experiment. The cell apoptosis was analyzed by annexin V-FITC/PI analysis. The inhibitory effect of miR-21 antisense oligonucleotide on tumor growth was evaluated by tumor growth curves and immunohistochemistry (MaxVision method). H-E staining was used to document morphological changes and fluorometric TUNEL assay was to detect the apoptotic activity. After the transfection of antisense miR-21, the expression of miR-21 decreased along with an obvious growth inhibition, compared with that of the control groups (P