Shh和Ptch在胆囊癌组织中的表达及其意义

目的 研究表明,Shh和Ptch是Hh传导通路的核心,消化系肿瘤中Hh通路的高度激活状态与消化系肿瘤的发生相关.本研究检测人胆囊腺癌标本中Shh和Ptch的表达,并探讨其意义.方法 采用免疫组化SP法对41例胆囊癌、21例胆囊腺瘤和20例正常胆囊组织中Shh和Ptch基因蛋白进行检测.结果 41例胆囊癌组织标本中Shh的阳性表达率为75.6%(31/41),Ptch的阳性表达率为78.0%(32/41).Shh和Ptch染色主要位于胆囊癌细胞的胞质和胞膜.20例正常胆囊组织中,Shh的阳性表达率为5%(1/20),Ptch的阳性表达率为10%(2/20).21例胆囊腺瘤组织中Shh的阳性表达率为4.7%(1/21),Ptch的阳性表达率为9.6%(2/21),各组间Shh和Ptch阳性表达率差异均有统计学意义(P＜0.001),而在不同性别、不同年龄组(年龄≥60岁及＜60岁)、不同病理组织学分级、Nevin不同分期、组织学不同分化程度、有无淋巴结或远处转移、有无伴发胆囊结石组间的Shh和Ptch阳性表达率表达差异均无统计学意义(P＞0.05).胆囊癌组织中Shh阳性表达率为75.6%与Ptch阳性表达率为78.0%之间存在显著正相关(r=0.72,P＜0.01).结论 原发性胆囊癌的发生可能与Hedgehog-Gli信号通路的异常活动密切相关.

Expression of Shh and Ptch gene in gallbladder carcinoma

Objective Shh and Ptch have been known to play critical roles in the hedgehog pathway and the hedgehog pathway activation occurs in the gastrointestinal cancers. This study was to detect the expression of Shh and Ptch in gallbladder carcinoma, and explore their correlation to gallbladder carcinoma. Methods The expression of Shh and Patch protein in 41 specimens of primary gallbladder carcinoma, 20 specimens of normal gallbladder and 21 specimens of adenoma tissue were assessed by immunohistochemistry.Results The positive expression rate of Shh and Ptch in gallbladder carcinoma was 75.6% (31/41) and 78.0% (32/40) respectively, in normal gallbladder mucous was 5% ( 1/20 ) and 5% ( 1/20 ) respectively,in gallbladder adenoma was 4.7% ( 1/21 ) and 9.6% (2/21) respectively, and there was significant differenee between the three groups in Shh and Patch expression values(P ＜0.001 ). However, there was no significant difference between age group, histological grade group, histologic type group, Nevin stage group,lymph node or distal organ metastasis group, and gallstone presence group in Shh and Ptch expression value (P ＞ 0.05, respectively). The expression of Shh was positively correlated to Ptch (r = 0.72, P ＜ 0.01 ).Conclusion These data support our hypothesis that Hh signaling is dysregulated in human gallbladder carcinognesis.