Steglich, Anne and Kessel, Friederike and Hickmann, Linda and Gerlach, Michael and Lachmann, Peter and Gembardt, Florian and Lesche, Mathias and Dahl, Andreas and Federlein, Anna and Schweda, Frank and Hugo, Christian P. M. and Todorov, Vladimir T. (2019) Renin cells with defective Gs alpha/cAMP signaling contribute to renal endothelial damage. PFLUGERS ARCHIV-EUROPEAN JOURNAL OF PHYSIOLOGY, 471 (9). pp. 1205-1217. ISSN 0031-6768, 1432-2013
Full text not available from this repository. (Request a copy)Abstract
Synthesis of renin in renal renin-producing cells (RPCs) is controlled via the intracellular messenger cAMP. Interference with cAMP-mediated signaling by inducible knockout of Gs-alpha (Gs alpha) in RPCs of adult mice resulted in a complex adverse kidney phenotype. Therein, glomerular endothelial damage was most striking. In this study, we investigated whether Gs alpha knockout leads to a loss of RPCs, which itself may contribute to the endothelial injury. We compared the kidney phenotype of three RPC-specific conditional mouse lines during continuous induction of recombination. Mice expressing red fluorescent reporter protein tdTomato (tdT) in RPCs served as controls. tdT was also expressed in RPCs of the other two strains used, namely with RPC-specific Gs alpha knockout (Gs alpha mice) or with RPC-specific diphtheria toxin A expression (DTA mice, in which the RPCs should be diminished). Using immunohistological analysis, we found that RPCs decreased by 82% in the kidneys of Gs alpha mice as compared with controls. However, the number of tdT-positive cells was similar in the two strains, demonstrating that after Gs alpha knockout, the RPCs persist as renin-negative descendants. In contrast, both renin-positive and tdT-labeled cells decreased by 80% in DTA mice suggesting effective RPC ablation. Only Gs alpha mice displayed dysregulated endothelial cell marker expression indicating glomerular endothelial damage. In addition, a robust induction of genes involved in tissue remodelling with microvascular damage was identified in tdT-labeled RPCs isolated from Gs alpha mice. We concluded that Gs alpha/renin double-negative RPC progeny essentially contributes for the development of glomerular endothelial damage in our Gs alpha-deficient mice.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SMOOTH-MUSCLE-CELLS; VESICLE-ASSOCIATED PROTEIN-1; TGF-BETA; GLOMERULAR EXPRESSION; LINEAGE CELLS; KIDNEY; CAMP; TRANSCRIPTION; HOMEOSTASIS; PODOCYTES; RPCs; Endothelial damage; Gs-alpha; Diphtheria toxin A; Renin cell ablation |
| Subjects: | 500 Science > 570 Life sciences |
| Divisions: | Biology, Preclinical Medicine > Institut für Physiologie > Prof. Dr. Frank Schweda |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 31 Mar 2020 06:54 |
| Last Modified: | 31 Mar 2020 06:54 |
| URI: | https://pred.uni-regensburg.de/id/eprint/26371 |
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