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机构地区:[1]武警广西总队医院药局,南宁市530003 [2]广西医科大学药学院
出 处:《天津医药》2012年第10期1022-1025,共4页Tianjin Medical Journal
基 金:国家自然科学基金资助项目(项目编号:30760310);广西地方性高发疾病防治研究重点实验室基金(项目编号:桂科能8042009-K6);广西科学基金(项目编号:桂科自0728113);广西中医药研究院中药质量标准研究重点实验室开放课题基金(项目编号:桂中重开0801)
摘 要:目的:在基因转录水平上探讨槲皮素逆转人肝癌多药耐药(MDR)的作用机制。方法:采用体外培养人肝癌耐5-氟尿嘧啶细胞Bel-FU,MTT法测定槲皮素的体外细胞毒性及浓度依赖的逆转耐药作用。实时定量PCR以及Westernblot检测槲皮素作用后细胞中基因mdr1、多药耐药相关蛋白(MRP)、谷胱甘肽-S-转移酶-π(GST-π)、拓扑异构酶Ⅱα(TopoⅡα)、H-ras和P-糖蛋白(P-gp)的表达变化。结果:槲皮素对Bel-FU细胞的IC10和IC50分别为58.2、193.9μmol/L。16.5、33.0、49.5μmol/L的槲皮素对Bel-FU的逆转耐药倍数分别为1.14、1.68、2.38倍;槲皮素可下调耐药细胞中基因mdr1、MRP、GST-π、H-ras表达(P<0.05),下调倍数分别为0.38、0.27、0.36、0.42,而对TopoⅡα无影响(P>0.05)。槲皮素可下调P-gp蛋白在耐药细胞中的表达量(P<0.05)。结论:槲皮素可下调耐药细胞中耐药相关基因的表达量,从而逆转人肝癌细胞的多药耐药性。Objective: To investigate the mechanism of the reverse effect of quercetin on muhidrug resistance (MDR) of human hepatocellular carcinoma (HCC) in the course of genetic transcription. Methods: Human hepatocellular carcinoma 5-FU resistant cell line Bel-FU was cultured in vitro. The cytotoxicity and dose-dependent reverse effect of quercetin were detected by MTT assay. The gene expression of mdrl, multidrug resistance associated protein (MRP), glutathione-S- transferase-π (GST-π), topoisomerase Ⅱ alpha (Topo Ⅱα), H-ras and P-glycoprotein (P-gp) were detected by real-time quantitative PCR and western-blot. Results: The 10% inhibitory concentration (IC10) and IC50 of quercetin were 58.2 μmol/ L and 193.9 μmol/L for Bel-FU cells respectively. Quercetin (16.5, 33.0 and 49.5 μmol/L) reversed MDR for Bel-FU was 1.14, 1.68 and 2.38 folds respectively. Quercetin down-regulated the gene expression of mdrl, MRP, GST-π and H-ras (P 〈 0.05), which were 0.38, 0.27, 0.36 and 0.42 folds respectively, but no effect on Topo Ⅱα (P 〈 0.05). P-gp expression was down-regulated in Bel-FU cells treated with Quercetin (P 〈 0.05). Conclusion: Quercetin can down-regulate the expression of related gene in resistant cell line and reverse the MDR of human HCC cells.
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