Endocrine Abstracts

The pocket protein family members, pRb, p107 and p130, are negative regulators of the cell cycle. But, while the role of pRB as a tumor suppressor has been extensively established, genetic inactivation of p107 or p130 is uncommon in tumors. Previous studies have shown that p130 cooperates with the CDK inhibitor p27Kip1 restricting proliferation of mouse intermediate lobe pituitary cells. Accordingly double knockout mice show higher incidence of pituitary tumors than single KO ...