The expression of miR-221 in cervical carcinoma and its relationship with HPV infection / 实用肿瘤学杂志

ABSTRACT

Objective The purpose of this study is to study the expression of miR -221 in cervical cancer tissues and its relationship with HPV infection .Methods HR-HPV infection was detected by HC2,and 30 cases of HR-HPV negative and 5 cases of HR-HPV positive cervical cancer tissues were collected .Mean-while,30 cases of normal cervical tissues in patients with benign disease were collected as control group .The ex-pression of miR -221was detected by RT -PCR,preliminarily investigating the relationship between miR -221 expression and the occurrence of cervical cancer and HPV infection .Through transfection of miR-221 and anti-miR-221 into HPV16-positive cervical carcinoma cell line Caski and HPV 16-negative cervical carcinoma cell line C33a,we observed the role of miR -221 on the migration and invasion of Caski cells and C 33a cells.Results Compared with normal cervical tissues , the expression of miR -221 in cervical cancer was significantly in-creased,the difference was statistically significant( P<0.01);and the expression of miR-221 was closely correl-ative to the patients with or without lymph node metastasis ,pathological grade and clinical stage ( P<0 .01 );the expression of miR-221 in HR-HPV positive cervical cancer tissues was higher than in HR -HPV negative cer-vical cancer tissues(P<0.01);transfection of miR -221 and anti-miR-221 could promote or downregulate C33 a and Caski cells migration and invasion ,and the changes between two groups had statistical significance ( P<0.05).Conclusion The increased expression of miR -221 in cervical cancer tissues is closely related to the oc-currence and development of cervical cancer and HPV infection .