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中国临床药理学与治疗学 ›› 2011, Vol. 16 ›› Issue (11): 1222-1226.

• 基础研究 • 上一篇    下一篇

PTPeta介导生长抑素对SMMC7721生长抑制作用的实验研究

许小兵, 张晓华, 杨妙芳, 吴晓尉, 李敏利, 朱人敏   

  1. 南京军区南京总医院消化内科干部病区,南京 210002,江苏
  • 收稿日期:2011-08-16 修回日期:2011-10-18 出版日期:2011-11-26 发布日期:2011-11-29
  • 通讯作者: 朱人敏,男,医学博士,博士生导师,主任医师,从事消化内科学研究。
  • 作者简介:许小兵,男,医学硕士,主治医师,从事消化内科研究。Tel: 15867878506 E-mail: 43933111@qq.com
  • 基金资助:
    南京军区南京总医院科研基金资助项目 (2010Q005)

Phosphotyrosine phosphatase eta mediates somatostatin's inhibition of hepatocellular carcinoma cell proliferation

XU Xiao-bing, ZHANG Xiao-hua, YANG Miao-fang, WU Xiao-wei, LI Min-li, ZHU Ren- min   

  1. Department of Gastroenterology, Nanjing General Hospital of Nanjing Military Command, Nanjing 210002,Jiangsu,China
  • Received:2011-08-16 Revised:2011-10-18 Online:2011-11-26 Published:2011-11-29

摘要: 目的: 采用生长抑素抑制人肝细胞肝癌细胞株SMMC7721增殖,检测细胞中蛋白酪氨酸磷酸酶eta(PTPeta)的表达情况,观察使用正钒酸钠抑制PTPeta活性后肿瘤细胞增殖变化。方法: 应用免疫荧光/RT-PCR法检测SMMC7721细胞中PTPeta的表达;RT-PCR、MTT法检测生长抑素作用后及正钒酸钠抑制PTPeta活性后,PTPeta的表达变化及肿瘤细胞增殖变化。结果: SMMC7721细胞中PTPeta表达为阳性,并定位于细胞壁;生长抑素作用后SMMC7721细胞内PTPeta表达增加,细胞增殖受抑,正钒酸钠可取消这一作用。结论: PTPeta在SMMC7721细胞中表达,并介导生长抑素对SMMC7721细胞生长抑制作用。

关键词: 蛋白酪氨酸磷酸酶eta, 肿瘤, 肝细胞肝癌, 生长抑素

Abstract: AIM: To investigate the expression of protein tyrosine phosphatase eta (PTPeta) in hepatocellular carcinoma SMMC7721 cells and to explore its influence on the anti-proliferation effect of somatostatin on hepatocellular carcinoma cells.METHODS: The mRNA and protein expression of PTPeta in hepatocellular carcinoma cell line SMMC7721 cells were detected using RT-PCR and immunofluorescence. The alteration of expression after administration of octreotide was measured by PT-PCR. The effect of octreotide on proliferation of SMMC7721 cells with or without vanadate which was the inhibitor of PTPeta was evaluated by MTT.RESULTS: Immunofluorescence study revealed a mainly membrane distribution of PTPeta in SMMC7721 cells, RT-PCR study found the expression of PTPeta mRNA increased after administration of somatostatin. MTT study showed that somatostatin's anti-proliferation effect on hepatocellular carcinoma cells was antagonized by vanadate.CONCLUSION: PTPeta is expressed in hepatocellular carcinoma cells, its expression is increased after administration of somatostatin, PTPeta mediated somatostatin's anti-proliferation effect on SMMC7721 cells.

Key words: PTPeta, Liver carcinoma, Hepatocellular carcinoma, Somatostatin

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