Expression of p16 and Cyclin D_1 in uterine endometrial carcinomas and its significance
HE Shu Yun, XIN Xiao Yan, WANG Jian, GUO Hui Ling Department of Obstetrics and Gynecology, Xijing Hospital, Fourth Military Medical University, Xi'an 710033, China
AIM To study the expression and significance of p16 and Cyclin D 1 in human uterine endometrial carcinomas. METHODS The expression of p16 and Cyclin D 1 was exa mined in malignant, borderline and benign uterine endometrial tissues by immunohistochemistry SABC methods. Monoclonal antibodies against p16 and Cyclin D 1 were employed. RESULTS The positive rates of p16 expression among the malignant, borderline and benign tumors were 40%, 68% and 0 respectively. Significant difference was observed ( P 0.05) in malignant tumors. The expression of p16 was associated with pathological grades and no association was found with clinical phases. Cyclin D 1 expression was negative in benign tumors and the positive rates in malignant and borderline tumors were 53% and 21% respectively ( P 0.05). In uterine endometrial carcinomas, no association was found between clinical phases and pathological grades. CONCLUSION There is an overexpression of Cyclin D 1 and a lower expression of p16 in uterine endometrial carcinomas and the synergy of the expression of p16 and Cyclin D 1 may contribute to the development of uterine endometrial carcinomas.