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DOI: 10.1055/s-2007-961816
© Georg Thieme Verlag KG Stuttgart · New York
The Non-neuronal Cholinergic System of Human Skin
Publication History
received 22. 12. 2005
accepted 16. 3. 2006
Publication Date:
27 February 2007 (online)
Abstract
In human skin both resident and transiently residing cells are part of the extra- or non-neuronal cholinergic system, creating a highly complex and interconnected cosmos in which acetylcholine (ACh) and choline are the natural ligands of nicotinic and muscarinic receptors with regulatory function in both physiology and pathophysiology. ACh is produced in keratinocytes, endothelial cells and most notably in immune competent cells invading the skin at sites of inflammation. The cholinergic system is involved in basic functions of the skin through autocrine, paracrine, and endocrine mechanisms, like keratinocyte proliferation, differentiation, adhesion and migration, epidermal barrier formation, pigment-, sweat- and sebum production, blood circulation, angiogenesis, and a variety of immune reactions. The pathophysiological consequences of this complex cholinergic “concert” are only beginning to be understood. The present review aims at providing insight into basic mechanisms of this highly complex system.
Keywords
acetylcholine - choline - endocrine - immune system - angiogenesis
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Correspondence
H. Kurzen
Department of Dermatology·Venereology and Allergology·University Medical Center Mannheim
Ruprecht-Karls University of Heidelberg
Theodor-Kutzer-Ufer 1-3
68135 Mannheim
Germany
Phone: +49/621/383 22 80
Fax: +49/621/383 38 15
Email: Hjalmar.Kurzen@haut.ma.uni-heidelberg.de
Email: Hjalmar.Kurzen@nexgo.de