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RARβ沉默对4-氨基-2-三氟甲基苯基维甲酸酯抗SGC-7901细胞增殖作用的影响 被引量:1

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摘要 目的制备并筛选有效沉默SGC-7901细胞维甲酸受体β(RARβ)基因的最佳siRNA序列,观察RARβ靶向沉默对4-氨基-2-三氟甲基苯基维甲酸酯(ATPR)抑制SGC-7901细胞增殖作用的影响。方法针对人RARβ全序列设计合成3条siRNA,以lipofectamine 2000(Lipo)为载体转染至SGC-7901细胞。转染后24、48 h应用RT-PCR和Western blot技术分别检测SGC-7901细胞内RARβ的mRNA和蛋白表达。选用最佳siRNA序列靶向沉默SGC-7901细胞RARβ后6 h加入AT-PR(终浓度为10-5mol.L-1),72 h后MTT法检测细胞增殖,流式细胞仪测定细胞周期动力学,分光光度法检测细胞裂解液中碱性磷酸酶(ALP)和乳酸脱氢酶(LDH)活力的变化。结果靶向沉默SGC-7901细胞中RARβ基因的最佳序列为siRNA-RARβ-homo-466且在浓度为100 pm.L-1、与Lipo的比例为1∶0.05时沉默效果最佳。与未沉默的ATPR给药组比较,RARβ-homo-466序列转染沉默后ATPR(10-5mol.L-1)给药组SGC-7901细胞增殖活性升高,G0/G1期细胞减少,S期细胞增多(P<0.01),ALP和LDH活力显著增强(P<0.05)。结论 siRNA-RARβ-homo-466可有效沉默RARβ基因的表达;RARβ沉默后,对ATPR敏感的SGC-7901细胞表现出ATPR抗性,提示RARβ可能是介导ATPR作用于SGC-7901细胞的主要环节。
出处 《安徽医药》 CAS 2012年第8期1066-1069,共4页 Anhui Medical and Pharmaceutical Journal
基金 "重大新药创制"科技重大专项(No 2011ZX09401)
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