Induction of β-Cell Proliferation and Retinoblastoma Protein Phosphorylation in Rat and Human Islets Using Adenovirus-Mediated Transfer of Cyclin-Dependent Kinase-4 and Cyclin D1

Abstract excerpt

The major regulator of the gap-1/synthesis phase (G(1)/S) cell cycle checkpoint is the retinoblastoma protein (pRb), and this is regulated in part by the activities of cyclin-dependent kinase (cdk)-4 and the D cyclins. Surprisingly, given the potential importance of beta-cell replication for islet replacement therapy, pRb presence, phosphorylation status, and function have not been explored in beta-cells. Here,...

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