title: K(+) channels and cell cycle progression in tumor cells.
abstract: K(+) ions play a major role in many cellular processes. The deregulation of K(+) signaling is associated with a variety of diseases such as hypertension, atherosclerosis, or diabetes. K(+) ions are important for setting the membrane potential, the driving force for Ca(2+) influx, and regulate volume of growing cells. Moreover, it is increasingly recognized that K(+) channels control cell proliferation through a novel signaling mechanisms triggered and modulated independently of ion fluxes. In cancer, aberrant expression, regulation and/or sublocalization of K(+) channels can alter the downstream signals that converge on the cell cycle machinery. Various K(+) channels are involved in cell cycle progression and are needed only at particular stages of the cell cycle. Consistent with this idea, the expression of Eag1 and HERG channels fluctuate along the cell cycle. Despite of acquired knowledge, our understanding of K(+) channels functioning in cancer cells requires further studies. These include identifying the molecular mechanisms controlling the cell cycle machinery. By understanding how K(+) channels regulate cell cycle progression in cancer cells, we will gain insights into how cancer cells subvert the need for K(+) signal and its downstream targets to proliferate.
authors: Laboratory of Cellular and Molecular Physiology EA4667, SFR CAP-SANTE FED 4231, UFR Sciences, University of Picardie Jules Verne Amiens, France.
authors: Halima
authors: H
authors: Ouadid-Ahidouch
authors: Ahmed
authors: A
authors: Ahidouch
keywords: CDK; K+ channels; calcium; cell cycle; cyclins; membrane potential; tumor cell; volume control
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