The tyrphostin B42 inhibits cell proliferation and HER-2 autophosphorylation in cervical carcinoma cell lines.

The HER family receptors have an important role controlling cell growth and differentiation. Although the activity of the HER-2 receptor is strictly controlled in normal cells, its overexpression plays a pivotal role in transformation and tumorigenesis. Constitutive phosphorylation of HER-2 protein has been implicated in conferring uncontrolled growth to mammary cancer cells, and to a lesser extent, with adenocarcinoma of uterus, cervix, fallopian tube, and endometrium.