Journal article

Rb intrinsically promotes erythropoiesis by coupling cell cycle exit with mitochondrial biogenesis

Vijay G Sankaran, Stuart H Orkin, Carl R Walkley

Genes & Development | COLD SPRING HARBOR LAB PRESS, PUBLICATIONS DEPT | Published : 2008

Abstract

Regulation of the cell cycle is intimately linked to erythroid differentiation, yet how these processes are coupled is not well understood. To gain insight into this coordinate regulation, we examined the role that the retinoblastoma protein (Rb), a central regulator of the cell cycle, plays in erythropoiesis. We found that Rb serves a cell-intrinsic role and its absence causes ineffective erythropoiesis, with a differentiation block at the transition from early to late erythroblasts. Unexpectedly, in addition to a failure to properly exit the cell cycle, mitochondrial biogenesis fails to be up-regulated concomitantly, contributing to this differentiation block. The link between erythropoies..

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