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  • Title: TRPM6 expression and cell proliferation are up-regulated by phosphorylation of ERK1/2 in renal epithelial cells.
    Author: Ikari A, Okude C, Sawada H, Yamazaki Y, Sugatani J, Miwa M.
    Journal: Biochem Biophys Res Commun; 2008 May 16; 369(4):1129-33. PubMed ID: 18339311.
    Abstract:
    Transient receptor potential melastatin 6 (TRPM6) is a magnesium channel and expressed in the intestine and renal distal tubules. Little is known about the regulatory mechanism of TRPM6 expression and the role of magnesium influx. EGF increased the phosphorylation of ERK1/2 and TRPM6 expression that were inhibited by U0126 in renal epithelial NRK-52E cells. Furthermore, EGF enhanced the influx of magnesium, whereas U0126 and TRPM6 siRNA inhibited it. EGF increased the proportion of cells in S phase, whereas U0126 and TRPM6 siRNA increased the proportion in G1 phase. The phosphorylation of ERK1/2 may up-regulate TRPM6 expression and magnesium influx, resulting in an increase in cell proliferation with a shift from G1 to S phase.
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