Université de Fribourg

Enhanced passive Ca²⁺ reabsorption and reduced Mg²⁺ channel abundance explains thiazide-induced hypocalciuria and hypomagnesemia

Nijenhuis, Tom ; Vallon, Volker ; Kemp van der, Annemiete W.C.M. ; Loffing, Johannes ; Hoenderop, Joost G.J. ; Bindels, René J.M.

In: The Journal of Clinical Investigation, 2005, vol. 115(6), p. 1651

Thiazide diuretics enhance renal Na⁺ excretion by blocking the Na⁺-Cl⁻ cotransporter (NCC), and mutations in NCC result in Gitelman syndrome. The mechanisms underlying the accompanying hypocalciuria and hypomagnesemia remain debated. Here, we show that enhanced passive Ca²⁺ transport in the proximal tubule rather than active Ca²⁺ transport in distal convolution explains...