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10.1038/s41598-019-55995-x

http://scihub22266oqcxt.onion/10.1038/s41598-019-55995-x
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suck abstract from ncbi


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pmid31863073      Sci+Rep 2019 ; 9 (1): 19540
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  • Deletion of the serine protease CAP2/Tmprss4 leads to dysregulated renal water handling upon dietary potassium depletion #MMPMID31863073
  • Keppner A; Maric D; Sergi C; Ansermet C; De Bellis D; Kratschmar DV; Canonica J; Klusonova P; Fenton RA; Odermatt A; Crambert G; Hoogewijs D; Hummler E
  • Sci Rep 2019[Dec]; 9 (1): 19540 PMID31863073show ga
  • The kidney needs to adapt daily to variable dietary K(+) contents via various mechanisms including diuretic, acid-base and hormonal changes that are still not fully understood. In this study, we demonstrate that following a K(+)-deficient diet in wildtype mice, the serine protease CAP2/Tmprss4 is upregulated in connecting tubule and cortical collecting duct and also localizes to the medulla and transitional epithelium of the papilla and minor calyx. Male CAP2/Tmprss4 knockout mice display altered water handling and urine osmolality, enhanced vasopressin response leading to upregulated adenylate cyclase 6 expression and cAMP overproduction, and subsequently greater aquaporin 2 (AQP2) and Na(+)-K(+)-2Cl(-) cotransporter 2 (NKCC2) expression following K(+)-deficient diet. Urinary acidification coincides with significantly increased H(+),K(+)-ATPase type 2 (HKA2) mRNA and protein expression, and decreased calcium and phosphate excretion. This is accompanied by increased glucocorticoid receptor (GR) protein levels and reduced 11beta-hydroxysteroid dehydrogenase 2 activity in knockout mice. Strikingly, genetic nephron-specific deletion of GR leads to the mirrored phenotype of CAP2/Tmprss4 knockouts, including increased water intake and urine output, urinary alkalinisation, downregulation of HKA2, AQP2 and NKCC2. Collectively, our data unveil a novel role of the serine protease CAP2/Tmprss4 and GR on renal water handling upon dietary K(+) depletion.
  • |11-beta-Hydroxysteroid Dehydrogenase Type 2/genetics/*metabolism[MESH]
  • |Adaptor Proteins, Signal Transducing/genetics/*metabolism[MESH]
  • |Animals[MESH]
  • |Aquaporin 2/*metabolism[MESH]
  • |Blotting, Western[MESH]
  • |Electrophoresis, Polyacrylamide Gel[MESH]
  • |Enzyme-Linked Immunosorbent Assay[MESH]
  • |Kidney/metabolism[MESH]
  • |Male[MESH]
  • |Membrane Proteins/genetics/metabolism[MESH]
  • |Mice[MESH]
  • |Potassium, Dietary/metabolism[MESH]
  • |Receptors, Glucocorticoid/metabolism[MESH]
  • |Reverse Transcriptase Polymerase Chain Reaction[MESH]
  • |Serine Endopeptidases/genetics/metabolism[MESH]


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