title: Physiological functions of CLC Cl- channels gleaned from human genetic disease and mouse models.
abstract: The CLC gene family encodes nine different Cl() channels in mammals. These channels perform their functions in the plasma membrane or in intracellular organelles such as vesicles of the endosomal/lysosomal pathway or in synaptic vesicles. The elucidation of their cellular roles and their importance for the organism were greatly facilitated by mouse models and by human diseases caused by mutations in their respective genes. Human mutations in CLC channels are known to cause diseases as diverse as myotonia (muscle stiffness), Bartter syndrome (renal salt loss) with or without deafness, Dent's disease (proteinuria and kidney stones), osteopetrosis and neurodegeneration, and possibly epilepsy. Mouse models revealed blindness and infertility as further consequences of CLC gene disruptions. These phenotypes firmly established the roles CLC channels play in stabilizing the plasma membrane voltage in muscle and possibly in neurons, in the transport of salt and fluid across epithelia, in the acidification of endosomes and synaptic vesicles, and in the degradation of bone by osteoclasts.
authors.affiliation: Zentrum für Molekulare Neurobiologie Hamburg (ZMNH), Universität Hamburg, Falkenried 94, D-20251 Hamburg, Germany. Jentsch@zmnh.uni-hamburg.de
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: Jentsch
authors.forename: Mallorie
authors.initials: M
authors.lastname: Poët
authors.forename: Jens C
authors.initials: JC
authors.lastname: Fuhrmann
authors.forename: Anselm A
authors.initials: AA
authors.lastname: Zdebik
mesh_terms: D000818:Animals; D018118:Chloride Channels / Q000235:genetics* / Q000378:metabolism*; D004195:Disease Models, Animal; D030342:Genetic Diseases, Inborn / Q000235:genetics*; D006801:Humans; D051379:Mice; D005810:Multigene Family
chemical_list: D018118:Chloride Channels