GRP78表达下调可降低肺腺癌细胞对VP-16的耐药

被引:10
作者
姜莉 [1 ]
张黎川 [2 ]
王琪 [3 ]
王斯炎 [3 ]
机构
[1] 山西省人民医院呼吸内科
[2] 大连大学附属中山医院呼吸内科
[3] 大连医科大学附属二院呼吸内科
关键词
GRP78; BAPTA-AM; VP-16; 肺肿瘤; 耐药;
D O I
暂无
中图分类号
R734.2 [肺肿瘤];
学科分类号
100117 [系统生物医学];
摘要
背景与目的GRP78(Glucose-regu lated protein78)是GRPs家族的成员之一,其高表达与某些肿瘤细胞化疗耐药相关。本研究旨在探讨在BAPTA-AM作用下肺腺癌SPCA-1细胞GRP78表达水平的变化及GRP78表达下调与细胞对VP-16耐药的相关性。方法将SPCA-1细胞随机分为BAPTA-AM处理组、A23187处理组及对照组。采用RT-PCR和免疫荧光细胞化学方法分别检测各组细胞中GRP78在核酸和蛋白水平的表达。采用流式细胞仪测定细胞在化疗药物足叶乙甙(VP-16)作用下的细胞生存率。结果与对照组和A23187处理组相比,BAPTA-AM处理组细胞GRP78在核酸和蛋白水平的表达均明显降低,而其在VP-16作用下的细胞凋亡率则明显升高(细胞凋亡率:BAPTA-AM处理组为10.84±0.86;对照组为6.85±0.20;A23187处理组为4.95±0.19;P<0.01)。结论BAPTA-AM能够抑制SPCA-1细胞GRP78的表达,GRP78表达下调能够提高SPCA-1细胞对VP-16的敏感性。因此,采用化学药物或反义RNA等方法抑制GRP78的表达可能成为未来治疗肺癌的新手段。
引用
收藏
页码:1159 / 1163
页数:5
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