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PTEN gene inhibits cell proliferation and increases sensitivity of chemotherapeutic drugs in esophageal squamous cell carcinoma

机译:PTEN基因抑制食管鳞状细胞癌的细胞增殖并提高化疗药物的敏感性

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The phosphatase and tensin homologue deleted from chromosome 10 (PTEN) is a lipid phosphatase with putative tumor suppressing abilities, which is frequently mutated in many cancers. In the present study, the mutated sites were investigated in PTEN gene from ESCC cell line EC9706 cells. In order to investigate the effects of the PTEN gene on the growth of ESCC cells, the two recombinant eukaryotic expression vectors pcDNA3. 1-wPTEN and pcDNA3.1-mPTEN were introduced into EC9706 cells. Besides, the relationship of PTEN status and the sensitivity of EC9706 cells to chemotherapy was determined in xenograft of nude mice. The results showed that the wild type PTEN gene inhibited obviously the proliferation of EC9706 cells, but the mutated PTEN gene not in vitro Furthermore, the wild type PTEN gene inhibited the growth of transplantable tumor and improved the sensitivity of cisplatin to EC9706 cells in vivo. These findings indicate that a tentative reason why ESCC with mutated or decreased expression of the PTEN gene possesses resistance to chemotherapeutic drugs.
机译:从第10号染色体(PTEN)缺失的磷酸酶和张力蛋白同源物是具有推定的肿瘤抑制能力的脂质磷酸酶,在许多癌症中经常发生突变。在本研究中,研究了来自ESCC细胞系EC9706细胞的PTEN基因中的突变位点。为了研究PTEN基因对ESCC细胞生长的影响,使用了两个重组真核表达载体pcDNA3。将1-wPTEN和pcDNA3.1-mPTEN导入EC9706细胞。此外,还确定了裸鼠异种移植物中PTEN状态与EC9706细胞对化疗敏感性的关系。结果表明,野生型PTEN基因明显抑制EC9706细胞的增殖,但不能体外突变PTEN基因。此外,野生型PTEN基因抑制了可移植肿瘤的生长,提高了顺铂对EC9706细胞的体内敏感性。这些发现表明,具有PTEN基因的突变或表达降低的ESCC对化学治疗药物具有抗性的暂时原因。

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