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      Resetting of renal tissular renin-angiotensin and bradykinin-kallikrein systems after unilateral kidney denervation in rats.

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          Abstract

          The renal tissular renin-angiotensin and bradykinin-kallikrein systems control kidney function together with the renal sympathetic innervation but their interaction is still unclear. To further elucidate this relationship, we investigated these systems in rats 6 days after left kidney denervation (DNX, n = 8) compared to sham-operated controls (CTR, n = 8). Plasma renin concentration was unchanged in DNX vs. CTR (p = NS). Kidney bradykinin (BK) and angiotensin (Ang) I and II concentrations decreased bilaterally in DNX vs. CTR rats (~20 to 40%, p < 0.05) together with Ang IV and V concentrations that were extremely low (p = NS). Renin, Ang III and dopamine concentrations decreased by ~25 to 50% and norepinephrine concentrations by 99% in DNX kidneys (p < 0.05) but were unaltered in opposite kidneys. Ang II/I and KA were comparable in DNX, contralateral and CTR kidneys. Ang III/II increased in right vs. DNX or CTR kidneys (40-50%, p < 0.05). Ang II was mainly located in tubular epithelium by immunocytological staining and its cellular distribution was unaffected by DNX. Moreover, the angiotensinergic and catecholaminergic innervation of right kidneys was unchanged vs. CTR. We found an important dependency of tissular Ang and BK levels on the renal innervation that may contribute to the resetting of kidney function after DNX. The DNX-induced peptide changes were not readily explained by kidney KA, renin or plasma Ang I generation. However, tissular peptide metabolism and compartmentalization may have played a central role. The mechanisms behind the concentration changes remain unclear and deserve further clarification.

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          Author and article information

          Journal
          Histochem. Cell Biol.
          Histochemistry and cell biology
          Springer Nature
          1432-119X
          0948-6143
          May 2017
          : 147
          : 5
          Affiliations
          [1 ] Institute for Cell Biology, University of Bern, Bern, Switzerland. juergen.bohlender@bluewin.ch.
          [2 ] Department of Nephrology, Hypertension and Clinical Pharmacology, Inselspital, Bern University Hospital, University of Bern, Freiburgstr. 4, 3010, Bern, Switzerland. juergen.bohlender@bluewin.ch.
          [3 ] Department of Medicine, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne, Switzerland.
          [4 ] Department of Urology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.
          [5 ] Service of Biomedicine, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne, Switzerland.
          [6 ] Institute for Cell Biology, University of Bern, Bern, Switzerland.
          Article
          10.1007/s00418-017-1543-y
          10.1007/s00418-017-1543-y
          28220244
          60f6467e-4449-4dcf-ba2f-d1265c6fdb12
          History

          Angiotensin,Bradykinin,Denervation,Kidney,Sympathetic
          Angiotensin, Bradykinin, Denervation, Kidney, Sympathetic

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