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作 者:顾金花[1] 陈玲[1] 陆培华[3] 陈敏斌[2]
机构地区:[1]江苏大学附属昆山医院检验中心,215300 [2]江苏大学附属昆山医院肿瘤科,215300 [3]南京医科大学附属无锡医院普外科
出 处:《肿瘤研究与临床》2012年第4期235-238,共4页Cancer Research and Clinic
基 金:国家自然科学基金(81108676、81101801);江苏省自然科学基金(BK2011374);昆山市科技计划(KS1132)
摘 要:目的研究多柔比星对乳腺癌MCF.7细胞增殖的影响,并探讨腺苷酸活化蛋白激酶(AMPK)在其中的作用。方法分别用AMPK激活剂AICAR、siRNA敲低AMPK表达(AMPKsiRNA)、AMPK抑制剂复合物C(AMPKi)联合多柔比星(DOX)对MCF-7细胞进行处理,在不同时间通过Westernblot方法检测AMPK、乙酰辅酶A羧化酶(ACC)、p38的活化,MTF检测细胞存活率间接反应细胞增殖。结果DOX可诱导MCF-7细胞AMPK的活化,AICAR单独或联合DOX可诱导AMPK的激活及增加MCF-7细胞增殖抑制率,AICAR+DOX组与DOX组细胞存活率分别为(17.74-1.6)%和(71.4±1.8)%(P〈0.001);AMPKi或AMPKsiRNA联合DOX后,P—AMPK及P—ACC表达明显下降,p38活化水平不受影响,MCF-7细胞增殖抑制率下降,AMPKi+DOX组与DOX组细胞存活率分别为(72.7±1.8)%和(96-3±1.7)%(P〈0.001),AMPKsiRNA+DOX组与错义siRNA+DOX组细胞存活率分别为(76.9±2.2)%和(95.9±1.8)%(P〈0.001)。结论AMPK介导DOX诱导的抗乳腺癌细胞增殖。Objective To investigate the mechanism of anti-breast cancer cell proliferation induced by doxorubicin (DOX). Methods AMP-Activated Protein Kinase (AMPK) activator AICAR, AMPK siRNA, AMPK inhibitor compound C (AMPKi) and doxorubiein treated MCF-7 cells at different time points; AMPK, acetyl CoA carboxylase (ACC), p38 activation were detected by Western blot. MTY was used as cell viability assay. Results Doxorubicin-induced activation of AMPK, AMPK agonist (AICAR)or in combination with doxorubicin activated AMPK and increased MCF-7 cell proliferation rate [the difference of cell viability between group AICAR±DOX(17.7±1.6 ) % and group DOX(71.4±1.8 ) % was significant(P〈0.001)]. After AMPKi or AMPK siRNA and doxorubicin combined administration, P-AMPK and P-ACC expression was significantly decreased, the level of p38 was not affected, and MCF-7 cell proliferation inhibition rate decreased [the cell viability of group AMPKi±DOX(72.7±1.8 ) % vs group DOX(96.3±1.7 ) %,P〈0.001;group AMPK siRNA ±DOX( 76.9±2.2 ) % vs group scramble siRNA±DOX(95.9±1.8) %,P〈0.001]. Conclusion AMPK is involved in doxorubicin-indueed anti-breast cancer cell proliferation.
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