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• 基础研究 • 上一篇    下一篇

DHEA抑制大鼠转移性Morris肝癌的实验研究

姜艳芳1, 谭 岩1, 赵平伟2, 刘力华1, 方艳秋1, 段秀梅1, 松崎静司3   

  1. 1. 吉林大学第一医院中心研究室, 吉林 长春130021;2.吉林大学第四医院肝胆外科,吉林 长春130011;3.日本筑波大学胃肠肝病科,茨城县,筑波305-8575
  • 收稿日期:2004-03-29 修回日期:1900-01-01 出版日期:2004-11-28 发布日期:2004-11-28

Experimental study on inhibitory effects of DHEAon transplanted Morris hepatomas in rats

JIANG Yan-fang1, TAN Yan1, ZHAO Ping-wei2, LIU Li-hua1,FANG Yan-qiu1, DUAN Xiu-mei1, YASUSHI Matsuzaki3   

  1. 1. Department of Central Laboratory, First Hospital, Jilin University, Changchun 130021, China;2. Departmentof Hepatobiliary Surgery, Fouth Hospital, Jilin University, Changchun 130011, China;3. Department of Gastroen-terology and Hepatology,Institute of Clinical Medicine, University of Tsukuba,Tsukuba, Ibaraki 305-8575, Japan
  • Received:2004-03-29 Revised:1900-01-01 Online:2004-11-28 Published:2004-11-28

摘要: 目的:探讨去氢表雄酮(DHEA)的体内抗癌作用及其机制。 方法:Buffalo大鼠21只随机分为空白对照组(n=5);肿瘤对照组(把Morris肝细胞瘤移植到大鼠的两肋皮下,建立Morris 肝细胞瘤移植的Buffalo大鼠的体内模型),喂养基础饲料(n=6)、DHEA肿瘤组(建立Morris肝细胞瘤移植模型后,在喂养的基础饲料中添加DHEA)(n=6)和去氢表雄酮硫酸酯(DHEA-s)肿瘤组(建立Morris肝细胞瘤移植模型后,在喂养的基础饲料中添加DHEA-s)(n=4)。分别喂养4周后,应用流式细胞术检测大鼠的免疫功能,应用磁场型高分解能质量分析仪(GC/MS)方法测定大鼠体内类固醇的含量,采用免疫组化方法染色检测磷酸化的磷酸酶和张力蛋白同源物基因(PTEN)蛋白表达,同时测定其对大鼠的毒副作用。 结果:DHEA肿瘤组的瘤重量[(8.31±0.61)g]较肿瘤对照组[(14.57±0.56)g]显著减小,抑制率达到43%。免疫组织化学染色显示DHEA肿瘤组的磷酸化PTEN蛋白表达量增加,同时提高了CD3、CD4阳性细胞百分率及CD4+/CD8+比值,与肿瘤对照组相比差异有显著性(P<0.05)。DHEA肿瘤组的胆固醇、甘油三脂及高密度脂蛋白的含量与空白对照组相比差异无显著性,未见其有毒副作用。 结论:DHEA对肿瘤具有明显的抑制作用,此作用是通过提高PTEN的蛋白表达和免疫功能来完成的。

关键词: 肝肿瘤, 基因, 肿瘤抑制, 磷酸酶和张力蛋白同源物基因

Abstract: Objective To investigate the inhibitory effects of dehydroepaimdrosterone (DHEA) on the growth of transplanted Morris hepatomas(7288CTC) in vivo in rats and its mechanism. Methods 21 Buffalo rats were randomly devided into 4 groups, including one blank control (n=5), one group for tumor-bearing control (n=6), and 2 experimental groups with DHEA (n=6) or DHEA-s (n=4). DHEA or DHEA-s was fed to the rats for 4 weeks immediately after Morris hepatomas (7288CTC) was implanted in both flanks. Phenotypes of the spleen lymphocytes were examined by flow cytometry, PTEN expression in tumor cells was detected with specific MoAb in immunohistochemistry. The steroid contents in rat sera were determined by GC-MS. Results Tumor weight of DHEA treated group was less than those of controls (P<0.05), the inhibitory rate was 43%. The positive rate of PTEN protein in DHEA tumor group was higher than those in the controls. The percentage of CD3+ and CD4+ T cells in the spleens of DHEA-feeding rats increased significantly compared with the control group (P<0.05). There was not significant difference of serum steroid,TG and HDL levels between DHEA treated group and the control group. Conclusion The DHEA can inhibit tumor by increasing the PTEN protein expression and immune function.

Key words: liver neoplasms, genes, tumor suppressor, phosphatase and tensin homologue deleted from chromosome ten

中图分类号: 

  • R979.1