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Sökning: WFRF:(Hausmann Ralf)

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  • Kuppe, Christoph, et al. (författare)
  • Inverse correlation between vascular endothelial growth factor back-filtration and capillary filtration pressures
  • 2018
  • Ingår i: Nephrology, Dialysis and Transplantation. - : OXFORD UNIV PRESS. - 0931-0509 .- 1460-2385. ; 33:9, s. 1514-1525
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Vascular endothelial growth factor A (VEGF) is an essential growth factor during glomerular development and postnatal homeostasis. VEGF is secreted in high amounts by podocytes into the primary urine, back-filtered across the glomerular capillary wall to act on endothelial cells. So far it has been assumed that VEGF back-filtration is driven at a constant rate exclusively by diffusion.Methods: In the present work, glomerular VEGF back-filtration was investigated in vivo using a novel extended model based on endothelial fenestrations as surrogate marker for local VEGF concentrations. Single nephron glomerular filtration rate (SNGFR) and/or local filtration flux were manipulated by partial renal mass ablation, tubular ablation, and in transgenic mouse models of systemic or podocytic VEGF overexpression or reduction.Results: Our study shows positive correlations between VEGF back-filtration and SNGFR as well as effective filtration rate under physiological conditions along individual glomerular capillaries in rodents and humans.Conclusion: Our results suggest that an additional force drives VEGF back-filtration, potentially regulated by SNGFR.
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