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Regulation of antidepressant activity by cAMP response element binding proteins

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Abstract

Depression is a clinically and biologically heterogeneous disease that is one of the most prevalent and costly psychiatric disorders. It is theleading cause of disability regarding job performance and burden on family members in the United States and worldwide. (1). Although the therapeutic efficacy of antidepressant drugs has been recognized for years, the exact molecular mechanisms of action remain elusive, making the systematic approach to the development of new drugs difficult. The acute increases in levels of monoamines brought about by various classes of antidepressants cannot account for the requirement of repeated, chronic administration for up to 2–6 wk before treatment benefits become evident. Furthermore, despite their efficacy, current antidepressant drugs improve symptoms in only 60% of patients treated (2). The development of new and better therapies depends on a thorough understanding of the neurobiology of depression and the molecular mechanisms underlying antidepressant drug action. Early studies focusing on alterations in the levels of receptors and second messengers helped define the important signaling pathways initiated by these drugs, whereas recent molecular studies suggested that long-term adaptations in cellular signaling mechanisms may be required for the onset and/or maintenance of antidepressant effects. Attention has now focused on downstream targets of Ca++ and cyclic adenosine monophosphate (cAMP) in the cell, such as the activation of transcription factors. This article discusses the transcription factor cAMP response element binding protein and a related protein, cyclic AMP response element modulator, and their role as molecular mediators of antidepressant action.

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  1. Departments of Pharmacology and Center for Neurobiology and Behavior, University of Pennsylvania, Philadelphia, Pennsylvania

    Alana C. Conti & Julie A. Blendy

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Conti, A.C., Blendy, J.A. Regulation of antidepressant activity by cAMP response element binding proteins. Mol Neurobiol 30, 143–155 (2004). https://doi.org/10.1385/MN:30:2:143

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