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The nuclear chloride ion channel NCC27 is involved in regulation of the cell cycle

Abstract

NCC27 is a nuclear chloride ion channel, identified in the PMA-activated U937 human monocyte cell line. NCC27 mRNA is expressed in virtually all cells and tissues and the gene encoding NCC27 is also highly conserved. Because of these factors, we have examined the hypothesis that NCC27 is involved in cell cycle regulation. Electrophysiological studies in Chinese hamster ovary (CHO-K1) cells indicated that NCC27 chloride conductance varied according to the stage of the cell cycle, being expressed only on the plasma membrane of cells in G2/M phase. We also demonstrate that Cl- ion channel blockers known to block NCC27 led to arrest of CHO-K1 cells in the G2/M stage of the cell cycle, the same stage at which this ion channel is selectively expressed on the plasma membrane. These data strongly support the hypothesis that NCC27 is involved, in some as yet undetermined manner, in regulation of the cell cycle.

Type Journal
ISBN 0022-3751 (Print)
Authors Valenzuela, S. M.;Mazzanti, M.;Tonini, R.;Qiu, M. R.;Warton, K.;Musgrove, E. A.;Campbell, T. J.;Breit, S. N. :
Publisher Name J PHYSIOL-LONDON
Published Date 2000-01-01 00:00:00
Published Volume 529 Pt 3
Published Pages 541-52
URL http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=11195932
Status Published In-print