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Deprecated: Implicit conversion from float 267.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Nat+Commun 2019 ; 10 (1): 5155 Nephropedia Template TP
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Elevated aldosterone and blood pressure in a mouse model of familial hyperaldosteronism with ClC-2 mutation #MMPMID31727896
Schewe J; Seidel E; Forslund S; Marko L; Peters J; Muller DN; Fahlke C; Stolting G; Scholl U
Nat Commun 2019[Nov]; 10 (1): 5155 PMID31727896show ga
Gain-of-function mutations in the chloride channel ClC-2 were recently described as a cause of familial hyperaldosteronism type II (FH-II). Here, we report the generation of a mouse model carrying a missense mutation homologous to the most common FH-II-associated CLCN2 mutation. In these Clcn2(R180Q/+) mice, adrenal morphology is normal, but Cyp11b2 expression and plasma aldosterone levels are elevated. Male Clcn2(R180Q/+) mice have increased aldosterone:renin ratios as well as elevated blood pressure levels. The counterpart knockout model (Clcn2(-/-)), in contrast, requires elevated renin levels to maintain normal aldosterone levels. Adrenal slices of Clcn2(R180Q/+) mice show increased calcium oscillatory activity. Together, our work provides a knockin mouse model with a mild form of primary aldosteronism, likely due to increased chloride efflux and depolarization. We demonstrate a role of ClC-2 in normal aldosterone production beyond the observed pathophysiology.