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Activation of cAMP-response-element-binding protein (CREB) after focal cerebral ischemia stimulates neurogenesis in the adult dentate gyrus

By Dong Ya Zhu, Lorraine Lau, Shu Hong Liu, Jian She Wei and You Ming Lu

Abstract

New neurons are generated in adult mammalians and may contribute to repairing the brain after injury. Here, we show that the number of new neurons in the dentate gyrus of adult rats increased in cerebral ischemic stroke and correlated with activation of the cAMP-response-element-binding protein (CREB). Inhibition of endogenous CREB by expression of a dominant-negative mutant of CREB (CREB-S133A or CREB-R287L) blocked ischemia-induced neurogenesis in the dentate gyrus of adult rats, whereas expression of constitutively active CREB, VP16-CREB, increased the number of new neurons. Thus, our findings provide roles and regulatory mechanisms for CREB in adult neurogenesis and possibly suggest a practical strategy for replacing dead neurons in brain injury

Topics: Biological Sciences
Publisher: National Academy of Sciences
Year: 2004
DOI identifier: 10.1073/pnas.0401063101
OAI identifier: oai:pubmedcentral.nih.gov:438997
Provided by: PubMed Central
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