Abstract:
:Cyclic adenosine monophosphate (cAMP) was the original "second messenger" to be discovered. Its formation is promoted by adenylyl cyclase activation after ligation of G protein-coupled receptors by ligands including hormones, autocoids, prostaglandins, and pharmacologic agents. Increases in intracellular cAMP generally suppress innate immune functions, including inflammatory mediator generation and the phagocytosis and killing of microbes. The importance of the host cAMP axis in regulating antimicrobial defense is underscored by the fact that microbes have evolved virulence-enhancing strategies that exploit it. Many clinical situations that predispose to infection are associated with increases in cAMP, and therapeutic strategies to interrupt cAMP generation or actions have immunostimulatory potential. This article reviews the anatomy of the cAMP axis, the mechanisms by which it controls phagocyte immune function, microbial strategies to dysregulate it, and its clinical relevance.
journal_name
Am J Respir Cell Mol Biolauthors
Serezani CH,Ballinger MN,Aronoff DM,Peters-Golden Mdoi
10.1165/rcmb.2008-0091TRsubject
Has Abstractpub_date
2008-08-01 00:00:00pages
127-32issue
2eissn
1044-1549issn
1535-4989pii
2008-0091TRjournal_volume
39pub_type
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