STAT3 and uterine cervix neoplasm: The decrease in STAT3 in cervical tumor cells has a drastic effect and induces an increase in the expression of cell cycle control proteins such as p21, pRB, and p53, showing a decrease in cyclin D1 expression with an increase in the induction of apoptosis, which is produced by a decrease in proapoptotic proteins and an increase in the activation of effector caspases [121,126].