目的: 探讨自噬特异性抑制剂3-甲基腺嘌呤(3-MA)联合组蛋白去乙酰化酶抑制剂曲古霉素A(TSA)对三阴性乳腺癌细胞MDA-MB-231生长的影响及其可能的分子机制.方法: MTT法检测TSA对MDA-MB-231细胞活力的抑制作用;划痕实验检测细胞迁移能力的变化;Western blot检测细胞自噬相关蛋白的变化;MTT法检测3-MA联合TSA对细胞活力的影响.结果: TSA可有效抑制乳腺癌MDA-MB-231细胞的生长,并呈剂量和时间依赖性;TSA抑制MDA-MB-231细胞的迁移能力,并诱导细胞发生自噬;3-MA可有效抑制TSA诱导的乳腺癌细胞自噬,并进一步抑制细胞活力,差异有统计学意义.结论: 3-MA可明显增加TSA对三阴性乳腺癌细胞MDA-MB-231的生长抑制作用.%AIM: To investigate the effect of 3-methyladenine (3-MA) combined with trichostatin A (TSA) on triple-negative breast cancer cells and the mechanism involved.METHODS: The viability of MDA-MB-231 cells was detected by MTT assay, the migration ability was determined by scratch assay, and the expression of autophagy-related proteins was detected by Western blot.RESULTS: TSA significantly inhibited the viability of MDA-MB-231 cells in a time-and dose-dependent manner.The results of scratch assay showed that TSA inhibited cell migration ability.Western blot data indicated that TSA resulted in a moderate increase in LC3-Ⅱ expression.Moreover, 3-MA inhibited cell autophagy induced by TSA, and combination of 3-MA and TSA further inhibited the viability of MDA-MB-231 cells.CONCLUSION: Combination of 3-MA and TSA may effectively inhibit the growth of triple-negative breast cancer cells.
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