磷酸化Akt和PTEN在非小细胞肺癌组织中的表达及其相关性

目的:探讨磷酸化Akt(p-Akt)与PTEN表达在非小细胞肺癌(NSCLC)侵袭、转移中的作用及其相关关系。方法:应用免疫组织化学SP法检测20例正常肺组织和102例非小细胞肺癌癌组织中p-Akt和PTEN蛋白的表达。结果:正常肺组织p-Akt为阴性表达,而PTEN为阳性表达;非小细胞肺癌癌组织中p-Akt表达的阳性率为41.2%(42/102),PTEN失表达率为46.1%(47/102)。p-Akt阳性表达和PTEN的失表达与肿瘤组织分化程度、临床分期以及有无淋巴结和远处转移相关。p-Akt和PTEN表达呈显著负相关(Phi r=-0.425,P<0.001)。结论:p-Akt过表达伴随着PTEN表达缺失,两者与NSCLC侵袭、转移有关。

Correlation between Akt phosphorylation and loss of PTEN protein expression in non-small-cell lung cancer

Purpose:To clarify roles of overexpression of phosphorylated Akt(p-Akt) and loss of phosphatase and tensin homologue deleted on chromosome 10(PTEN) expression in biological behavior of non-small-cell lung cancer(NSCLC). Methods:Immunohistochemical staining was used to determine the expression of p-Akt and PTEN in 20 cases of normal lung tissues and 102 patients with NSCLC.Results:Negative p-Akt expression and positive PTEN expression were found in normal lung tissues, while the positive incidences of p-Akt expresssion and loss of incidences of PTEN expresssion in NSCLC were 41.2% (42/102) and 46.1% (47/102)respectivtly.The overexpression of p-Akt and loss of PTEN expression were correlated to degree of differention of cancer, metastasis(including lymph node), and clinical stages. A significant negative correlation was observed between expression of p-Akt and PTEN(Phi r=-0.425,P<0.001).Conclusions:The present study demonstrates overexpression of p-Akt accompanied by the loss of PTEN in clinical specimes of NSCLC. Both p-Akt and PTEN are concerned with invasion and metastasis of NSCLC.