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J. Neurosci. 29, 7966-7977 (2009)
Survival and integration of new neurons in the hippocampal circuit are rate-limiting steps in adult hippocampal neurogenesis. Neuronal network activity is a major regulator of these processes, yet little is known about the respective downstream signaling pathways. Here, we investigate the role of cAMP response element-binding protein (CREB) signaling in adult hippocampal neurogenesis. CREB is activated in new granule neurons during a distinct developmental period. Loss of CREB function in a cell-autonomous manner impairs dendritic development, decreases the expression of the neurogenic transcription factor NeuroD and of the neuronal microtubule-associated protein, doublecortin (DCX), and compromises the survival of newborn neurons. In addition, GABA-mediated excitation regulates CREB activation at early developmental stages. Importantly, developmental defects after loss of GABA-mediated excitation can be compensated by enhanced CREB signaling. These results indicate that CREB signaling is a central pathway in adult hippocampal neurogenesis, regulating the development and survival of new hippocampal neurons downstream of GABA-mediated excitation.
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Publication type Article: Journal article
Document type Scientific Article
Keywords dentate gyrus; in-vivo; transcription factors; newborn neurons; granule cells; morphological maturation; mouse hippocampus; creb gene; neurogenesis; differentiation
ISSN (print) / ISBN 0270-6474
Journal Journal of Neuroscience
Quellenangaben Volume: 29, Issue: 25, Pages: 7966-7977
Publisher Society for Neuroscience
Reviewing status Peer reviewed
Institute(s) Institute of Developmental Genetics (IDG)