Title: Downregulation of volume-activated Cl- currents during muscle differentiation
Authors: Voets, Thomas ×
Wei, L
De Smet, Patrick
Van Driessche, Willy
Eggermont, Jan
Droogmans, Guillaume
Nilius, Bernd #
Issue Date: Feb-1997
Series Title: The American journal of physiology. vol:272 issue:2 Pt 1 pages:C667-74
Abstract: We have used the whole cell configuration of the patch-clamp technique to investigate volume-activated Cl- currents in BC3H1 and C2C12 cells, two mouse muscle cell lines that can be switched from a proliferating to a differentiated musclelike state. Reducing the extracellular osmolality by 40% evoked large Cl- currents in proliferating BC3H1 and C2C12 cells. These currents were outwardly rectifying and had an anion permeability sequence as follows: I- > Br- > Cl- >> gluconate. They were inhibited by >50% by flufenamic acid (500 microM), niflumic acid (500 microM), and 5-nitro-2-(3-phenylpropylamino)benzoic acid (100 microM) but were relatively insensitive to tamoxifen (100 microM). A reduction in the serum concentration in the culture medium induced growth arrest in both cell lines, and the cells started to differentiate into spindle-shaped nonfusing muscle cells (BC3H1) or myotubes (C2C12). This differentiation was accompanied by a drastic decrease in the magnitude of the volume-activated Cl- currents. The close correlation between volume-activated Cl- currents and cell proliferation suggests that these currents may be involved in cell proliferation.
ISSN: 0002-9513
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Physiology Section (-)
Department of Cellular and Molecular Medicine - miscellaneous
Laboratory of Ion Channel Research (VIB-KU Leuven Center for Brain & Disease Research)
Laboratory of Cellular Transport Systems
× corresponding author
# (joint) last author

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