子宫颈微偏腺癌的蛋白表达

目的 探讨对诊断子宫颈微偏腺癌(MDA)有价值的指标.方法 应用免疫组织化学EnYisionTM二步法检测9例MDA中CEA、Ki-67、p16、MUC6、MUCSAC、ER、PR、α-SMA的表达情况.另选12例正常子宫颈腺组织及21例其他类型腺癌组织作对照.结果 MDA中CEA、MUC6、α-SMA的阳性表达(表达率分别为66.67%、77.78%、88.89%)显著高于正常子宫颈腺体(0、8.33%、0),MDA中平均Ki-67标记指数(21.03±5.46)亦显著高于对照组(0.12±0.08),而ER、PR的阳性表达前者低于后者,差异均具有统计学意义(P＜0.05);p16、MUC5AC的阳性表达在对照组与MDA组之间差异无统计学意义(P＞0.1).MDA中MUC6蛋白的阳性表达率(77.78%)高于其他类型腺癌(14.29%),而p16蛋白的阳性表达率(11.11%)低于其他类型腺癌(71.43%),二者差异均具有统计学意义(P＜0.01);CEA、Ki-67、MUC5AC、ER、PR、α-SMA蛋白的阳性表达在两组之间差异无统计学意义(P＞0.05).结论 CEA、Ki-67、MUC6、α-SMA蛋白的阳性表达可能有助于MDA的诊断,腺上皮细胞ER、PR的阴性表达亦支持MDA.p16蛋白的过表达可能参与了部分普通型子宫颈腺癌的发生、发展,但在MDA中可能不起重要作用.

Expression of protein in cervical minimal deviation adenocarcinoma

Objective To study the valuable index for the diagnosis of cervical minimal deviation adenocarcinoma(MDA).Methods Immunohistochemical EnVisionTM two-step method was used to evaluate the expression of CEA,Ki-67,p16,MUC6,MUC5AC,ER,PR,α-SMA in 9 samples of MDA.12 normal cervical gland tissues and 21 other types of cervical adenocarcinomas were as controls. Results The expression of CEA,MUC6,α-SMA protein in MDA(positive ratio orderly 66.67%,77.78%,88.89%)was higher than that of normal cervical gland(0,8.33%).The average Ki-67 labeling index in MDA(21.03±5.46)was also higher than that of the normal group(0.12±0.08).But as to the expression of ER and PR,the former was lower than the latter.All the differences had statistical significance (P<0.05).The expression of p16,MUC5AC had no statistical significance between the two groups(P＞0.1).The ratio of positive expression of MUC6 protein in MDA(77.78%)was higher than that of the other types of adenocarcinomas(14.29%),with the expression of p16(11.11%)lower than the latter(71.43%).All the differences had statistical significance(P＜0.01).The expression of CEA,Ki-67,MUC5AC,ER,PR,α-SMA had no statistical significance between the two groups(P＞0.05).Conclusion Immunohistochemical positive detection of CEA,Ki-67,MUC6,α-SMA perhaps make for the diagnosis of cervical MDA.The absence of ER,PR of gland cells also support MDA.Overexpression of p16 may play an impo~ant role on the occurrence and the development of some usual adenocarcinoma of cervix,but perhaps not in MDA.