RegⅣ、EGFR、PI3K蛋白在胃腺癌中的表达及意义

摘要

目的：研究再生基因蛋白Ⅳ（ Regenerating gene typeⅣ，RegⅣ）、表皮生长因子受体（ Epider-mal growth factor receptor ，EGFR）及磷脂酰肌醇3-激酶（ Phosphatidylinositol -3-kinase，PI3K）蛋白在胃腺癌中的表达及临床意义。方法应用S-P免疫组化技术检测73例胃腺癌及其相应的癌旁正常组织中RegⅣ、EGFR和PI3K蛋白的表达情况。结果73例胃腺癌组织中RegⅣ、EGFR、PI3K蛋白的阳性表达率分别为50．7％（37/73）、56．2％（41/73）、69．9％（51/73）均高于癌旁正常组织20．5％（15/73）、19．2％（14/73）、21．9％（16/73），差异具有统计学意义（ P＜0．05）；RegⅣ的表达与肿瘤分化程度相关，差异有统计学意义（P＜0．05）；EGFR蛋白的表达与浸润深度、淋巴结转移、临床分期相关，差异有统计学意义（P＜0．05）；PI3K蛋白的表达与肿瘤分化程度、浸润深度、淋巴结转移、临床分期相关有统计学意义（P＜0．05）。 RegⅣ与EGFR、PI3K蛋白在胃腺癌组织中的表达呈正相关（r＝0．343、0．248，P＜0．05），EGFR与PI3K蛋白在胃腺癌组织中的表达呈正相关（ r＝0．384，P＜0．05）。结论 RegⅣ可能通过激活EGFR/PI3K/Akt信号通路在胃腺癌的发生发展中发挥重要作用。%Objective To investigate the expression and clinical significance of RegⅣand EGFR,PI3K proteins in gastric adenocarcinoma .Methods S-P immunohistochemistry was used to detect the expression of RegⅣand EGFR,PI3K proteins in pathological tissues of 73 cases with gastric adenocarcinoma and tumor -adja-cent normal gastric tissues .Results The positive expression rates of RegⅣand EGFR,PI3K proteins in 73 cases with gastric adenocarcinoma tissue were 50.7%(37/73),56.2%(41/73) and 69.9%(51/73) respectively, which were significantly different from the positive expression rates of tumor -adjacent normal gastric tissues ,be-ing 20.5%(15/73),19.2%(14/73),and 21.9%(16/73),respectively(P<0.05).The expression of RegⅣprotein was significantly correlated to differentiation degree ( P<0.05 ) and the expression of EGFR protein was significantly correlated to infiltrative depth,TNM stage,and lymph node metastasis(P<0.05).The expression of PI3K protein was significantly correlated to differentiation degree ,infiltrative depth,TNM stage and lymph node metastasis(P<0.05).There was positive correlation between the expressions of RegⅣ/EGFR,RegⅣ/PI3K and EGFR/PI3K proteins in gastric adenocarcinoma and the values of Spearman coefficient correlation were 0.325, 0.403 and 0.384,respectively(P<0.05).Conclusion RegⅣmay play an important role in gastric adenocarci-noma genesis and progression by activating EGFR /PI3K/Akt signaling pathway .