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10.1038/ki.1997.141 http://scihub22266oqcxt.onion/10.1038/ki.1997.141 9083264!ä!9083264 Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 243.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 243.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 243.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534       Kidney+Int 1997 ; 51 (4): 1008-17 Nephropedia Template TP {{tp|p=9083264|t=1997. Cellular mechanisms of chlorothiazide and cellular potassium depletion on Mg2+ uptake in mouse distal convoluted tubule cells |pdf=|usr=}}{{9083264}} gab.com Text Cellular mechanisms of chlorothiazide and cellular potassium depletion on Mg2+ uptake in mouse distal convoluted tubule cells JO: Kidney Int http://www.kidney.de/pget.php?&tw=1&pmid=9083264 #FOAvip The use of the distally-acting diuretic, chlorothiazide, has been reported to have important effects on renal magnesium handling. The cellular mechanisms of chlorothiazide action on Mg2+ uptake was investigated in immortalized mouse distal convoluted tubule (MDCT) cells. Intracellular free Mg2+ concentration was determined by microfluorescence. Mg2+ transport was measured as a function of change in intracellular Mg2+ concentration with time following placement of Mg2+-depleted cells into a buffer containing 1.5 mM magnesium. The uptake rate of Mg2+ into Mg2+-depleted cells was 179 +/- 28 nM/second. Mg2+ uptake was dependent on the membrane voltage as membrane hyperpolarization enhanced uptake whereas depolarization diminished transport. Chlorothiazide increased Mg2+ uptake by 58%, from 179 +/- 28 to 283 +/- 23 nM/second. The ability of chlorothiazide to stimulate Mg2+ uptake in MDCT cells was concentration-dependent and related to the diuretic-induced hyperpolarization of the plasma membrane. These studies support the notion that acute chlorothiazide administration enhances renal magnesium conservation through its effects on Mg2+ transport within the distal convoluted tubule. Since chronic chlorothiazide administration may result in hypokalemia as well as hypomagnesemia, Mg2+ uptake was determined in potassium-depleted MDCT cells. Mg2+ uptake was diminished, 80 +/- 24 nM/second, in potassium depleted cells. Hyperpolarization of the plasma membrane with the cell permanent anion, SCN-, corrected Mg2+ uptake in potassium depleted cells suggesting that the basis for diminished uptake may, in part, be due to depolarization of the membrane voltage. In summary, acute chlorothiazide stimulates Mg2+ transport in MDCT cells. We postulate that chronic chlorothiazide use may lead to hypokalemia that in turn diminishes Mg2+ transport in the distal tubule resulting in urinary magnesium-wasting. Twit Text FOAVip Cellular mechanisms of chlorothiazide and cellular potassium depletion on Mg2+ uptake in mouse distal convoluted tubule cells ????Kidney Int http://www.kidney.de/pget.php?&tw=1&pmid=9083264 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=9083264 #FOAvip English Wikipedia <ref>{{Cite pmid|9083264}}</ref> Cellular mechanisms of chlorothiazide and cellular potassium depletion on Mg2+ uptake in mouse distal convoluted tubule cells #MMPMID9083264 Dai LJ; Friedman PA; Quamme GA Kidney Int 1997[Apr]; 51 (4): 1008-17 PMID9083264show ga The use of the distally-acting diuretic, chlorothiazide, has been reported to have important effects on renal magnesium handling. The cellular mechanisms of chlorothiazide action on Mg2+ uptake was investigated in immortalized mouse distal convoluted tubule (MDCT) cells. Intracellular free Mg2+ concentration was determined by microfluorescence. Mg2+ transport was measured as a function of change in intracellular Mg2+ concentration with time following placement of Mg2+-depleted cells into a buffer containing 1.5 mM magnesium. The uptake rate of Mg2+ into Mg2+-depleted cells was 179 +/- 28 nM/second. Mg2+ uptake was dependent on the membrane voltage as membrane hyperpolarization enhanced uptake whereas depolarization diminished transport. Chlorothiazide increased Mg2+ uptake by 58%, from 179 +/- 28 to 283 +/- 23 nM/second. The ability of chlorothiazide to stimulate Mg2+ uptake in MDCT cells was concentration-dependent and related to the diuretic-induced hyperpolarization of the plasma membrane. These studies support the notion that acute chlorothiazide administration enhances renal magnesium conservation through its effects on Mg2+ transport within the distal convoluted tubule. Since chronic chlorothiazide administration may result in hypokalemia as well as hypomagnesemia, Mg2+ uptake was determined in potassium-depleted MDCT cells. Mg2+ uptake was diminished, 80 +/- 24 nM/second, in potassium depleted cells. Hyperpolarization of the plasma membrane with the cell permanent anion, SCN-, corrected Mg2+ uptake in potassium depleted cells suggesting that the basis for diminished uptake may, in part, be due to depolarization of the membrane voltage. In summary, acute chlorothiazide stimulates Mg2+ transport in MDCT cells. We postulate that chronic chlorothiazide use may lead to hypokalemia that in turn diminishes Mg2+ transport in the distal tubule resulting in urinary magnesium-wasting. |Animals[MESH] |Cell Line[MESH] |Chlorothiazide/*pharmacology[MESH] |Diuretics[MESH] |Hypokalemia/chemically induced/metabolism[MESH] |Ion Transport/drug effects[MESH] |Kidney Tubules, Distal/cytology/*drug effects/*metabolism[MESH] |Kinetics[MESH] |Magnesium/*metabolism[MESH] |Membrane Potentials[MESH] |Mice[MESH] |Potassium/*metabolism[MESH]Cellular mechanisms of chlorothiazide and cellular potassium depletion(epmc).pdf DeepDyve Pubget Overpricing