沉默LncRNA HOXD-AS1调控miR-454-3p表达增加H460细胞放射敏感性

目的 探究LncRNA HOXD-AS1靶向调控miR-454-3p表达对肺癌H460细胞放射敏感性影响。方法 qRT-PCR检测HOXD-AS1、miR-454-3p表达量,流式细胞术检测细胞凋亡率,克隆实验检测细胞放射敏感性。蛋白印迹法检测细胞中Caspase-3、Cyclin D1、γ-H2AX的蛋白表达量。结果 照后细胞中HOXD-AS1表达升高(P<0.05),miR-454-3p表达降低(P<0.05)。沉默HOXD-AS1促进细胞凋亡、增加放射敏感性,促进Caspase-3、γ-H2AX蛋白表达,抑制Cyclin D1表达;HOXD-AS1可靶向结合miR-454-3p并可负向调控其表达。结论 沉默HOXD-AS1可靶向调控miR-454-3p促进肺癌细胞凋亡及抑制细胞存活进而提高放射敏感性。

Silencing LncRNA HOXD-AS1 enhances the radiosensitivity of H460 cells by regulating miR-454-3p expression

Objective To explore the effect of LncRNA HOXD-AS1 on the radiosensitivity of H460 cells by targeting the regulation of miR-454-3p expression. Methods H460 cells were irradiated with 0,2,4,6 and 8 Gy,and the expression levels of HOXD-AS1 and miR-454-3p were detected by qRT-PCR. Cell apoptosis rate were measured by flow cytometry experiments. Cell cloning experiments were used to detect cell radiosensitivity. The protein expression levels of Caspase-3,Cyclin D1 and γ-H2AX were detected by Western blot. Results The expression of HOXD-AS1 in H460 cells was significantly increased after X-ray irradiation (P<0.05),while the expression of miR-454-3p was significantly decreased (P<0.05). Silencing HOXD-AS1 significantly promoted apoptosis,increased radiosensitivity of lung cancer cells,promoted Caspase-3,γ-H2AX protein expression,and inhibited Cyclin D1 expression. HOXD-AS1 could target the expression of miR-454-3p. Conclusion Silencing HOXD-AS1 can promote the apoptosis of lung cancer cells and inhibit cell survival by targeting miR-454-3p to increase the radiosensitivity of lung cancer cells.