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Multiplicity of Ca2+ Messengers and Ca2+ Stores: A Perspective from Cyclic ADP-Ribose and NAADP

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It is generally believed that multiple Ca2+ stores are present in cells, a notion that has now been made substantive by the discovery of multiple Ca2+ mobilizing messengers. Cyclic ADP-ribose (cADPR) and nicotinic acid dinucleotide phosphate (NAADP) are two such messengers that are derived from NAD and NADP, respectively. A wide variety of cells, from plants to mammals, including human, have been shown to be responsive to these two novel Ca2+ messengers. Not only are their structures and mechanisms of action different, their targeted Ca2+ stores are also distinct and separable. This article explores the implications of the multiplicity of Ca2+ stores in cellular signaling. Special emphasis will be put on the recent progress in the understanding of the physiological functions of NAADP.
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Keywords: adp-ribosyl cyclase; cd38; cyclic adp-ribose (cadpr); mobilization; naadp

Document Type: Review Article

Affiliations: University of Minnesota,Department of Pharmacology. Minneapolis, MN 55455, USA.

Publication date: 01 May 2004

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  • Current Molecular Medicine is an interdisciplinary journal focused on providing the readership with current and comprehensive reviews on fundamental molecular mechanisms of disease pathogenesis, the development of molecular-diagnosis and/or novel approaches to rational treatment. The reviews should be of significant interest to basic researchers and clinical investigators in molecular medicine. Periodically the journal will invite guest editors to devote an issue on a basic research area that shows promise to advance our understanding of the molecular mechanism(s) of a disease or has potential for clinical applications.
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