title: TRPV6 potentiates calcium-dependent cell proliferation.
abstract: The Ca(2+) homeostasis within cells controls a diversity of cellular processes including gene transcription, proliferation and apoptosis. Perturbance of Ca(2+) signaling may induce deregulation of cell proliferation and suppression of cell death providing the basis for cancer development. In human prostate cancer, a correlation between the mRNA expression of the Ca(2+) channel TRPV6 and the staging of the cancer has been described. We have analyzed the influence of TRPV6 on cell proliferation within HEK-293 cells. We show that TRPV6 increases cell proliferation of HEK-293 cells in a Ca(2+) dependent manner. The increased proliferation correlates with slightly increased intracellular Ca(2+) levels without interfering with the intrinsic Ca(2+) dependence of HEK-293 cell proliferation. Low doses of econazole inhibit both, TRPV6 dependent Ca(2+) signals and cell proliferation while BTP2, a potent inhibitor of Ca(2+) signals and cell proliferation in T-cells, neither influences TRPV6 dependent Ca(2+) signals nor cell proliferation of HEK-293 cells. Our data demonstrate that TRPV6 increases the rate of Ca(2+) dependent cell proliferation which is a prerequisite for its potential role in tumor progression.
authors.affiliation: Department of Physiology, University of the Saarland, Homburg, Germany. eva.schwarz@uniklinikum-saarland.de
authors.forename: Eva C
authors.initials: EC
authors.lastname: Schwarz
authors.forename: Ulrich
authors.initials: U
authors.lastname: Wissenbach
authors.forename: Barbara A
authors.initials: BA
authors.lastname: Niemeyer
authors.forename: Bettina
authors.initials: B
authors.lastname: Strauss
authors.forename: Stephan E
authors.initials: SE
authors.lastname: Philipp
authors.forename: Veit
authors.initials: V
authors.lastname: Flockerzi
authors.forename: Markus
authors.initials: M
authors.lastname: Hoth
mesh_terms: D000813:Anilides / Q000494:pharmacology; D015220:Calcium Channels / Q000235:genetics / Q000378:metabolism*; D020013:Calcium Signaling / Q000187:drug effects / Q000502:physiology*; D002460:Cell Line; D049109:Cell Proliferation / Q000187:drug effects; D002470:Cell Survival; D004464:Econazole / Q000494:pharmacology; D015870:Gene Expression; D006801:Humans; D008297:Male; D011471:Prostatic Neoplasms / Q000235:genetics / Q000378:metabolism; D011994:Recombinant Proteins / Q000235:genetics / Q000378:metabolism; D050916:TRPV Cation Channels / Q000235:genetics / Q000378:metabolism*; D013830:Thiadiazoles / Q000494:pharmacology; D014162:Transfection
chemical_list: C476308:4-methyl-4'-(3,5-bis(trifluoromethyl)-1H-pyrazol-1-yl)-1,2,3-thiadiazole-5-carboxanilide; D000813:Anilides; D015220:Calcium Channels; D011994:Recombinant Proteins; D050916:TRPV Cation Channels; C422827:TRPV6 protein, human; D013830:Thiadiazoles; D004464:Econazole