Journal
EXPERT OPINION ON THERAPEUTIC TARGETS
Volume 7, Issue 3, Pages 441-451Publisher
ASHLEY PUBLICATIONS LTD
DOI: 10.1517/14728222.7.3.441
Keywords
adenylyl cyclase (AC); cAMP; forskolin; isoform-specific; P-site inhibitor
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Funding
- NHLBI NIH HHS [HL59729, HL59139] Funding Source: Medline
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Adenylyl cyclase (AC) is a target enzyme of multiple G-protein-coupled receptors (GPCRs). In the past decade, the cloning, structure and biochemical properties of nine AC isoforms were reported, and each isoform of AC shows distinct patterns of tissue distribution and biochemical/pharmacological properties. In addition to the conventional regulators of this enzyme, such as calmodulin (CaM) or PKC, novel regulators, for example, caveolin, have been identified. Most importantly, these regulators work on AC in an isoform-dependent manner. Recent studies have demonstrated that certain classic AC inhibitors, i.e., P-site inhibitors, show an isoform-dependent inhibition of AC. The side chain modifications of forskolin, a diterpene extract from Coleus forskolii, markedly enhance its isoform selectivity. When taken together, these findings suggest that it is feasible to develop new pharmacotherapeutic agents that target AC isoforms to regulate various neurohormonal signals in a highly tissue-/organ-specific manner.
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