Abstract
Correlation of p16 and cyclin D1 expression with the incidence and prognosis of cardiac carcinoma was investigated. Thirty-six patients with cardiac carcinoma treated in The Second Affiliated Hospital of Zhengzhou University were selected. After the radical operation of cardiac carcinoma, carcinoma tissues were taken, and the corresponding para-carcinoma tissues were used as controls. p16 and cyclin D1 messenger ribonucleic acid (mRNA) and protein expression in cardiac carcinoma tissues and para-carcinoma tissues were detected via quantitative polymerase chain reaction (qPCR) and western blot analysis. The survival time and pathological conditions of patients with cardiac carcinoma were recorded in detail, and correlation of p16 and cyclin D1 with incidence and prognosis of cardiac carcinoma was studied. In cardiac carcinoma tissues, the p16 mRNA and protein expression levels were significantly lower than those in para-carcinoma tissues (P<0.01), but the cyclin D1 mRNA and protein expression levels were significantly higher than those in para-carcinoma tissues (P<0.01). The expression of p16 and cyclin D1 protein had correlation with the tumor size, lymph node metastasis and tumor-node-metastasis stage of cardiac carcinoma (P<0.01). There was a negative correlation between expression of p16 and cyclin D1 in cardiac carcinoma (P<0.01). According to Kaplan-Meier survival analysis, the survival rate of patients with high expression of p16 was obviously higher than that of patients with low expression of p16 (P<0.01), while the survival rate of patients with high expression of cyclin D1 was obviously lower than that of patients with low expression of cyclin D1 (P<0.01). Both p16 and cyclin D1 are closely related to the incidence and prognosis of cardiac carcinoma, which may become indexes for the incidence and prognosis of cardiac carcinoma.