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HSP90β在细胞中的表达水平与化疗敏感性的相关研究 被引量:1

Correlative Study on Intracellular Expression of HSP90β and Sensitivity of Chemotherapy
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摘要 目的了解胃癌细胞SGC7901及其耐药细胞SGC7901/VCR中HSP90β蛋白的表达,与化疗药物敏感性的关系及降低细胞HSP90β蛋白的表达是否影响化疗药物的敏感性。方法用免疫组化法检测胃癌细胞SGC7901及其耐药细胞SGC7901/VCR中HSP90β蛋白的表达。MTT法测定SGC7901、SGC7901/VCR细胞及其相应的HSP90β蛋白低表达细胞AH-SGC7901和AH-SGC7901/VCR对化疗药物的敏感性,流式细胞仪测定细胞内药物含量。结果SGC7901/VCR细胞HSP90β蛋白的表达高于SGC7901细胞。SGC7901/VCR细胞对ADM、VCR、MMC和CTX的IC50分别为0.398、1.25、0.199和3 981.07μg/ml。SGC7901对ADM、VCR、MMC及CTX的IC50分别为1.58×10-6、1.99×10-3、3.1×10-2及630μg/ml。SGC7901/VCR相对于SGC7901细胞对ADM、VCR、MMC和CTX的耐药指数分别为2.52×105、6.28×102、6.42和6.32。 Objective To evaluate the expression of HSP90β in SGC7901 of human gastric cancer cell line and in SGC7901/VCR of MDR-type human gastric cancer cell line and its correlation with drug sensitivity of tumor cells and to study whether decreasing the expression of HSP90β could influence the tumor cell sensitivity to chemotherapeutic agents. Methods Immunohistochemical method was used to evaluate the expression of HSP90β in SGC7901 and SGC7901/VCR cell lines. AH-SGC7901 and AH-SGC7901/VCR cells were their corresponding low HSP90β expression cell lines. MTT was used to evaluate their sensitivity to Adriamycin ADR vincrinstine VCR mitomycin MMC and cyclophos-phamide CTX and flow cytometry was used to determine intracellular drug concentration of these cells. Results The expression of HSP90β protein in SGC7901/VCR cell line was higher than that in SGC7901 lines. IC50 of SGC7901/VCR cell to ADR VCR MMC and CTX were 0.398 1.25 0.1999 and 3981.07μg/ml respectively and IC50 of SGC7901 cell to ADR VCR MMC and CTX were 1.58×10-6 1.99×10-3 3.1×10-2 and 630ug/ml respectively. Drug resistance index of SGC7901/VCR to ADR VCR MMC and CTX as compared with SGC7901 were 2.52×105 6.28×102 6.24and 6.32 respectively and sensitivity of AH-SGC7901 and AH-SGC7901/VCR cells to chemotherapeutic drugs was much increased. The sensitivity of AH-SGC7901 to ADR VCR and MMC increased 1010000 and 24.8 times respectively as compared with its parent cell lines and its sensitivity to CTX had no obvious change. The sensitivity of AH-SGC7901/VCR to ADRVCRMMC and CTX incresed 3.98 6.28 3.15 and 5.01 times respectively as compared with its parent cell line. The mean fluorescence intensity of ADR in AH-SGC7901 and AH-SGC7901/VCR cell was significantly increased P< 0.05. Conclusion The expression of HSP90β protein in SGC7901/VCR cell line was higher than that in SGC7901 cell lines. The sensitivity of AH-SGC7901 and AH-SGC7901/VCR cells to chemotherapeutic drugs was much increased and the drug sensitivity of AH-SGC7901 cell was increased more obviously than that of AH-SGC7901/VCR cell.
出处 《中国肿瘤临床》 CAS CSCD 北大核心 2000年第10期725-728,共4页 Chinese Journal of Clinical Oncology
基金 国家自然科学基金资助!(资助号39570806) 国家杰出青年资助!(资助号39625023)
关键词 多药耐药性 药敏试验 胃癌 HSP90β Multi-drug resistance HSP90β MTT FCM
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