北京市留学人员科技择优资助项目资助(北京市重大项目)(2008002)
This work was supported by a grant from The Scientific Research Foundation for Returned Overseas Chinese Scholars, Bureau of Human Resources and Social Security of Beijing, China(2008002)
探讨P16INK4a及Sonic hedgehog(Hh-Gli)信号通路蛋白在宫颈癌及癌前病变(CIN)中的表达相关性及其意义.采用Western-blot方法检测HPV16阳性及HPV18阳性宫颈癌细胞系P16INK4a及Hh-Gli信号通路蛋白Smo、Ptch及Gli表达.免疫组化检测组织芯片P16INK4a、Shh、Smo、Ptch及Gli表达,包括20例正常宫颈、18例癌旁组织、54例CIN及28例宫颈鳞癌组织.分析P16INK4a与Hh-Gli信号通路蛋白间表达相关性及与临床病理因素的关系.结果显示P16INK4a、Smo、Ptch及Gli蛋白在HPV16及HPV18阳性宫颈癌细胞系中表达无显著差异(P>0.05).P16INK4a、Shh、Smo、Ptch及Gli蛋白在宫颈癌中表达强度显著高于癌旁及正常组织(P<0.05),在CINⅠ与正常组织间差异不显著(P>0.05).P16INK4a、Shh、Smo及Gli蛋白,在CINⅠ、CINⅡ与CINⅢ之间均有显著性差异(P<0.05).相关分析显示,CINⅡ-CINⅢ中P16INK4a与Shh和Smo蛋白表达正相关,浸润癌中P16INK4a与Shh、Smo和Gli蛋白正相关.结论认为,P16INK4a及Hh-Gli信号通路异常激活与宫颈癌发生及演进密切相关,且二者间具有相关性.Hh-Gli信号通路的激活可能是Shh配体增高调控Smo高表达而上调Gli蛋白所致.
To investigate the expression and the relationship of P16INK4a and sonic hedgehog signal pathway in cervical squamous cell carcinoma and its precursor lesions. The expression of P16INK4a, Smo, Ptch and Gli in different HPV types positive cell lines were detected by Western-blot. A tissue microarray constructed with 20 normal cervical tissues and 100 uterine cervical cancers and related lesions (28 squamous cell carcinomas, 26 cervical intraepithelial neoplasia (CIN)Ⅲ, 16 CINⅡ, 12 CINⅠ, 18 tumor-adjacent tissue specimens) was immunohistochemically analyzed with anti- P16INK4a, Shh, Patched (Ptch), Smoothened (Smo), Gli antibodies. The correlation between their expressions was analyzed. There was no significant difference among different HPV type cell lines regarding the expression of P16INK4a and Shh, Ptch and Gli proteins(P>0.05). The expression of P16INK4a and the Hh-signaling molecules was greatly enhanced in cervical carcinoma tissues, compared with that in normal epithelium and tumor-adjacent tissues (P<0.05). There was no significant difference between CINⅠ and normal epithelium(P>0.05), whereas, in case of P16INK4a, Shh, Smo, and Gli, the differences among CINⅠ, CINⅡ and CINⅢ were significant (P<0.05). The expression of P16INK4a protein was significantly correlated with that of Shh, Smo and Gli protein in CINⅡ-CINⅢ and cervical carcinoma and was correlated with that of Shh, Smo only in carcinoma tissue. P16INK4a and the Hh-Gli signaling pathways were extensively activated in the development and evolution of cervical cancer, and the overexpression of P16INK4a was correlated with Hh-signaling pathways. The abnormal Hh-signaling pathways maybe much associated with Smo protein overexpression induced by Shh, which can upregulate the expression of Gli protein.
苗劲蔚,张永清,徐春玉,房纯,邓小虹.宫颈鳞癌演进过程P16INK4a及Hh-Gli信号通路相关蛋白表达及其相关性研究[J].生物化学与生物物理进展,2012,39(7):671-677
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