小檗碱通过下调METTL3表达抑制肾癌细胞侵袭和迁移的机制
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篇名: 小檗碱通过下调METTL3表达抑制肾癌细胞侵袭和迁移的机制
TITLE: Mechanism of berberine inhibiting invasion and migration of renal carcinoma cells by down-regulating the expression of METTL3
摘要: 目的 探讨小檗碱(BER)对人肾癌细胞侵袭、迁移的抑制作用及可能机制。方法以人肾癌OSRC-2细胞为对象进行实验。采用alamarBlue法测定0(对照组)、25、50、75、100、125、150、175、200μmol/LBER作用24、48h后对OSRC-2细胞增殖的抑制作用。用0(对照组)、50、100μmol/LBER作用于细胞48h后,通过流式细胞术分析BER对细胞周期的影响;通过细胞划痕实验观察24、36h时各组细胞的迁移能力;通过Transwell实验观察作用24h时各组细胞的侵袭能力;并通过Westernblot法检测上述药物作用48h后细胞中甲基转移酶样蛋白3(METTL3)的蛋白表达,通过RNA甲基化定量试剂盒检测各组细胞内RNA的N6-甲基腺嘌呤(m6A)水平。结果与对照组比较,不同浓度BER均可显著升高OSRC-2细胞的增殖抑制率(P<0.01),并呈时间和浓度依赖性趋势;50、100μmol/LBER作用48h后可将细胞周期阻滞在G0/G1期(P<0.01);50、100μmol/LBER组细胞的迁移、侵袭能力均显著降低(P<0.05或P<0.01),细胞中METTL3蛋白的表达水平和RNA的m6A水平均显著降低(P<0.01)。结论BER可通过下调METTL3的表达,进而抑制m6A水平,从而抑制人肾癌细胞的侵袭、迁移。
ABSTRACT: OBJECTIVE To investigate the inhibitory effect of berberine (BER) on the invasion and migration of human renal carcinoma cells and its potential mechanism. METHODS Using human renal carcinoma OSRC-2 cell as object, alamarBlue assay was adopted to detect the inhibitory effects of 0 (control group), 25, 50, 75, 100, 125, 150, 175 and 200 μmol/L BER on the proliferation of OSRC-2 cell after treatment for 24 h and 48 h. After treated with 0(control group), 50, 100 μmol/L BER for 48 h, the effect of BER on cell cycle was analyzed by flow cytometry. The migration of OSRC-2 cells in 24 h and 36 h was observed by cell scratch test, and the invasion ability of OSRC-2 cells in 24 h was detected by Transwell assay. The protein expression of methyltransferase-like 3 (METTL3) was detected by Western blot after treatment for 48 h, and RNA methylation quantification kit was used to detect the levels of N6-methyladenosine (m6A) in OSRC-2 cells. RESULTS Compared with control group, BER at different concentrations could significantly decrease the survival rate of OSRC-2 cells (P<0.01), and showed a dose-dependent and time-dependent manner. After 48 h of BER treatment at 50, 100 μmol/L, the cell was arrested in G0/G1 phase (P<0.01). Compared with control group, the migration and invasion abilities of cells in 50, 100 μmol/L BER group were significantly decreased (P<0.05 or P<0.01); the protein expression of METTL3 and the level of m6A in RNA were significantly decreased (P<0.01). CONCLUSIONS BER can inhibit level of m6A by down-regulating the expression of METTL3, thereby inhibiting the invasion and metastasis of human renal carcinoma cells.
期刊: 2023年第34卷第15期
作者: 杨天宇;帅立雄;许竞泽;程馨阳;许志明;张永胜
AUTHORS: YANG Tianyu,SHUAI Lixiong,XU Jingze,CHENG Xinyang,XU Zhiming,ZHANG Yongsheng
关键字: 小檗碱;人肾癌OSRC-2细胞;迁移;侵袭;甲基转移酶样蛋白3;N6-甲基腺嘌呤
KEYWORDS: berberine; human renal carcinoma OSRC-2 cell; migration; invasion; methyltransferase-like 3; N6-
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