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p-PKB和PTEN在子宫颈癌组织中的表达和意义 被引量:1

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摘要 目的探讨子宫颈癌组织中磷酸化蛋白激酶B(p—PKB)和与张力蛋白同源的第10染色体丢失的磷酸酶基因(phosphatase and tension homologuede leted on chromosome 10,PTEN)的关系。方法采用免疫组化SP法检测51例子宫颈癌组织.36例宫颈上皮内癌变(cervical intraepithelial neoplasiaCIN)组织和20例正常宫颈组织中p-PKB和PTEN蛋白的表达,并分析其与子宫颈癌临床病理因素的关系结果P—PKB在宫颈癌组织中的阳性表达率(74.5%)明显高于CIN组(52.8%)和正常宫颈组织组(15%)(P〈0.05),p—PKB蛋白的表达随宫颈癌分化程度下降,临床分期升高而升高(P〈0.05),在无淋巴结转移的宫颈癌中的表达明显低于有淋巴结转移者(P〈0.05)。PTEN蛋白在宫颈瘟组织中的阳性表达率(39.2%)明显低于CIN组(69.4%)和正常宫颈组织组(95.0%)(P〈0.05),PTEN蛋白的表达随宫颈癌分化程度下降.临床分期升高而下降(P〈0.05),在无淋巴结转移的宫颈癌中的表达明显高于有淋巴结转移者(P〈0.05)。子宫颈癌中p-PKB和PTEN蛋白的表达呈自相关(r=-0.238,P〈0.05),结论p—PKB蛋白在宫颈癌组织中过表达,PTEN蛋白在宫颈癌中表达明显降低,与p-PKB蛋白表达呈负相关.PTEN表达缺失可能使PI3K/AKT信号传导通路异常活化,活化的PKB即磷酸化PKB(p—PKB)可以抑制肿瘤细胞凋亡,使细胞异常增殖分化,从而促进宫颈癌的发生发展。
出处 《医学信息》 2011年第3期961-963,共3页 Journal of Medical Information
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