RESUMO
Objective To analyse the expression and significance of CD44 variant (CD44v17) in the process of cervical intraepithelial neoplasia (CIN) to cervical cancer,and to explore the relationship of CD44v17 with CIN and cervical cancer.Methods The expressions of CD44v17,matrix metalloproteinase 9 (MMP9) and Ki67 in normal cervical tissue,CIN Ⅰ,Ⅱ,Ⅲ and cervical carcinoma tissues were detected by real-time quantitative RCR.The expressions of CD44v17,MMP9 and Ki67 in human cervical cancer cell lines HeLa and SiHa after transfecting with CD44v17 siRNA were detected,as well.The tumor-bearing nude mice were treated with lentivirus particles of CD44v17,and the influence of CD44v17 siRNA on tumorigenicity in nude mice was analysed.Results The expression level of CD44v17 increased gradually from CIN Ⅰ,Ⅱ,Ⅲ to cervical carcinoma tissues.Compared with normal cervical tissue,the expression levels of CD44v1 7,MMP9 and Ki67 were significantly increased in CIN Ⅱ,Ⅲ and cervical carcinoma tissues (P＜0.05),while no significant difference was found between normal cervical tissue and CIN Ⅰ tissue (P＞0.05).The expression levels of MMP9 and Ki67 in human cervical cancer cell lines HeLa and SiHa were decreased significantly after transfecting with CD44v17 siRNA (P＜0.01).The tumor volume and weight were decreased by treatment with CD44v17 siRNA transfection (P＜0.01),and the tumorigenicity in nude mice was decreased.Conclusion CD44v17 may promote the development of CIN to cervical cancer.It is expected to be an indicator in predicting malignant potential of CIN.