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Mol Neurobiol. 2009 Aug;40(1):73-86. doi: 10.1007/s12035-009-8072-1. Epub 2009 May 13.

Inducible cAMP early repressor (ICER) and brain functions.

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  • 1Unit for Molecular Neurobiology of Learning and Memory, Okinawa Institute of Science and Technology, Uruma, Okinawa 904-2234, Japan.


The inducible cAMP early repressor (ICER) is an endogenous repressor of cAMP-responsive element (CRE)-mediated gene transcription and belongs to the CRE-binding protein (CREB)/CRE modulator (CREM)/activating transcription factor 1 (ATF-1) gene family. ICER plays an important role in regulating the neuroendocrine system and the circadian rhythm. Other aspects of ICER function have recently attracted heightened attention. Being a natural inducible CREB antagonist, and more broadly, an inducible repressor of CRE-mediated gene transcription, ICER regulates long-lasting plastic changes that occur in the brain in response to incoming stimulation. This review will bring together data on ICER and its functions in the brain, with a special emphasis on recent findings highlighting the involvement of ICER in the regulation of long-term plasticity underlying learning and memory.

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