热疗促进HSP70表达对免疫效应细胞杀伤肿瘤的影响  

Influence of HSP70 on combined method of hyperthermia and immunologic effector cells to treat cancer

作　　者：石永进[1] 虞积仁[1] 岑溪南[1] 朱强[1] 任汉云[1] 

机构地区：[1]北京大学第一医院血液内科,北京100034

出　　处：《北京大学学报（医学版）》2005年第2期175-178,共4页Journal of Peking University:Health Sciences

摘　　要：目的: 探讨热疗通过促进乳腺癌药物敏感细胞株与多药耐药细胞株表达热休克蛋白 (HSP)70,提高免疫效应细胞对靶细胞的杀伤活性。为开展基于热疗的细胞免疫治疗提供实验依据。方法: 采用IFNγ、CD3单抗、IL 1和IL 2等细胞因子诱导并扩增免疫效应细胞。分别给予乳腺癌药物敏感株MCF7和耐受株MCF7 /ADR非致死温度热冲击 42℃ 1h,继续培养 4h, 24h, 48h后收获细胞,用流式细胞术检测靶细胞上HSP70的表达。用四甲基偶氮唑蓝(MTT)法测定靶细胞增殖活性以及免疫效应细胞对靶细胞的杀伤活性。结果: HSP70在两种靶细胞上的表达有差异,加热前MCF7 /ADR细胞HSP70表达明显高于MCF7,加热后 4h,HSP70在MCF7 /ADR表达提高了 6倍,在MCF7表达提高了 22倍,超过了耐药株。药物敏感株MCF7增殖的热抑制率低于耐药株MCF7 /ADR。热冲击前免疫效应细胞对MCF7细胞的杀伤活性低于MCF7 /ADR细胞。热冲击后免疫效应细胞对MCF7的杀伤活性提高了 86. 23%,超过了对MCF7 /ADR的杀伤活性 (提高了 30. 32% )。结论: 热疗明显提高HSP70在乳腺癌药物敏感与耐受细胞系上的表达,增加了免疫效应细胞对这两种靶细胞的杀伤活性。HSP70在乳腺癌药物敏感与耐受细胞系上的差异性表达对免疫效应细胞的杀伤活性有影响。Objective: To investigate hyperthermia enhanced expression of heat shock protein70 (HSP70) in breast cancer drug sensitive cell line MCF7 and multi-drug resistant (MDR) cell line MCF7/ADR, so as to increase cytotoxic activity of immunologic effector cells against the target cells, and to provide an experimental basis for cell immunotherapy based on hyperthermia. Methods: The immunological effector cells were induced and expanded by cytokines. Breast cancer cell lines MCF7 and MCF7/ADR were treated at 42 ℃ for an hour. Then after being incubated for additional 4 hours, 24 hours and 48 hours, the cells were digested. Flow cytometry (FCM) was used to detect the expression of HSP70 on the target cells. MTT assay was employed to evaluate cell proliferation and the cytotoxic activity of immunologic effector cells against target cells. Results: The expressions of HSP70 in both the target cells had significant difference. The expression of HSP70 in MCF7/ADR cells was higher than in MCF7 cells before hyperthermia. After hyperthermia the expression of HSP70 increased by 6 folds in MCF7/ADR cells, and 22 folds in MCF7 cells and was higher than in MCF7/ADR cells at hour 4. The proliferation inhibition fraction of hyperthermia against MCF7 was significantly lower than that of MCF7/ADR. The cytotoxic activity of immunologic effector cells against MCF7 cells was lower than against MCF7/ADR cells before hyperthermia. After hyperthermia the cytotoxic activity of immunologic effector cells against MCF7 cells rose by 86.23%, and was higher than against MCF7/ADR cells (rose by 30.32%). Conclusion: The expression of HSP70 in breast cancer drug sensitive cell line MCF7 and MDR cell line MCF7/ADR were enhanced significantly by hyperthermia. Cytotoxic activity of immunologic effector cells against both the target cells were increased by hyperthermia. The differential expressions of HSP70 in breast cancer drug sensitive cell line MCF7 and MDR cell line MCF7/ADR affect the cytotoxic activity of immunologic effector cells.

关 键 词：免疫效应细胞 HSP70表达 MCF7/ADR细胞 热疗 杀伤肿瘤 多药耐药细胞株 流式细胞术检测 四甲基偶氮唑蓝 杀伤活性 药物敏感 细胞免疫治疗 细胞因子诱导 细胞增殖活性 MCF7增殖 MCF7细胞 热休克蛋白 靶细胞 CD3单抗 差异性表达 

分 类 号：R392.12[医药卫生—免疫学] R977.2[医药卫生—基础医学]