胃腺癌组织中P21、HER2、EGFR表达临床病理关系探讨

目的 探讨P21、HER2、EGFR蛋白在胃腺癌组织中的表达特点及其临床病理关系.方法 应用免疫组织化学技术对65例胃腺癌病理切片进行P21、HER2和EGFR的联合检测,并结合检测结果进行统计学分析.结果 65例胃腺癌组织中P21、HER2、EGFR阳性表达率分别为56.9％（37/65）、43.1％（28/65）、30.8％（20/65）.经统计学分析,P21、HER2、EGFR蛋白的表达与胃腺癌组织的分化程度、浸润深度、是否有癌栓、淋巴结转移、远处转移和TNM分期密切相关（P＜0.05,P＜0.01）.与性别、年龄、肿瘤直径、肿瘤部位和组织学类型均无统计意义（P＞0.05）.P21表达与HER2、EGFR阳性表达,及HER2表达与EGFR阳性表达均有统计意义（P＜0.05）.结论 P21、HER2、EGFR的表达结果表明胃腺癌存在着多基因表达,这些基因可能共同参与了胃腺癌的发生和发展.三者的联合检测有助于判断胃腺癌的生物学行为和预后,也可为临床选择分子靶向药物治疗提供依据.

Clinicopathological study of P21, HER2, EGFR expression in gastric adenocarcinoma tissue

Objective To explore P21,HER2,EGFR protein expression in gastric adenocarcinoma tissue and their clinical pathological relationship.Methods Immunohistochemical technique was used in P21,HER2 and EGFR joint detection for 65 cases of gastric adenocarcinoma biopsy.The result was statistically analyzed.Results The positive expression rates of P21,HER2,EGFR were 56.9％ （37/65）,43.1％ （28/65）,30.8％ （20/65） respectively.Statistical analysis showed,P21,HER2,EGFR protein expression were related to gastric adenocarcinoma tissue differentiation,depth of invasion,with or without tumor thrombus,lymph node metastasis,distant metastasis and TNM stage （P ＜ 0.05 or P ＜ 0.01）,not related to gender,age,tumor size,tumor location and histological type （P ＞ 0.05）.P21 expression was related to HER2 and EGFR expression,and HER2 expression was related to EGFR expression （P ＜ 0.05）.Conclusions P21,HER2,EGFR expression results in gastric adenocarcinoma show the existence of multi-gene expression,these genes may be involved in the occurrence and development of gastric adenocarcinoma.The joint detection is helpful in determining the biological behavior and prognosis of gastric adenocarcinoma,and provides the basis for clinical molecular targeted therapy selection.