Elodie Ehret, Yannick Jäger, Chloé Sergi, Anne-Marie Mérillat, Thibaud Peyrollaz, Deepika Anand, Qing Wang, Fréderique Ino, Marc Maillard, Stephan Kellenberger, Ivan Gautschi, Roman Szabo, Thomas H Bugge, Lotte K Vogel, Edith Hummler, Simona Frateschi
The serine protease prostasin (CAP1/Prss8, channel-activating protease-1) is a confirmed in vitro and in vivo activator of the epithelial sodium channel ENaC. To test whether proteolytic activity or CAP1/Prss8 abundance itself are required for ENaC activation in the kidney, we studied animals either hetero- or homozygous mutant at serine 238 (S238A; Prss8cat/+ and Prss8cat/cat ), and renal tubule-specific CAP1/Prss8 knockout (Prss8PaxLC1 ) mice. When exposed to varying Na+ -containing diets, no changes in Na+ and K+ handling and only minor changes in the expression of Na+ and K+ transporting protein were found in both models...
June 16, 2022: International Journal of Molecular Sciences