Parathyroid hormone-related protein promotes inflammation in the kidney with an obstructed ureter

Kidney International
David RámilaPedro Esbrit

Abstract

Parathyroid hormone-related protein (PTHrP) promotes fibrogenesis in the acutely damaged kidney. Considering the relation between fibrosis and inflammation, we studied transgenic mice that overexpress PTHrP in the proximal tubule. When unilateral ureteric obstruction was induced in these transgenic mice, we found that they had more renal tubulointerstitial damage, leukocyte influx, and expression of proinflammatory factors than their control littermates. Reversal of PTHrP constitutive overexpression in these transgenic mice or treatment of control mice with the PTHrP antagonist (7-34) decreased this inflammatory response. Losartan, which abolished obstruction-induced endogenous PTHrP upregulation, also decreased the latter response but less effectively in transgenic mice. The PTHrP fragment (1-36) induced nuclear factor-kappaB (NF-kappaB) activation and proinflammatory cytokine overexpression in mouse cortical tubule cells in culture as well as migration of the macrophage cell line Raw 264.7. All these effects were decreased by PTHrP (7-34) and NF-kappaB or extracellular signal-regulated kinase (ERK) activation inhibitors. Our findings suggest a critical role of PTHrP in the renal inflammatory process that results from ureteral...Continue Reading

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Citations

Nov 4, 2008·International Urology and Nephrology·Francisco C Perez-MartinezRobert M Levin
Mar 5, 2010·Nephrology, Dialysis, Transplantation : Official Publication of the European Dialysis and Transplant Association - European Renal Association·Montserrat RomeroRicardo J Bosch
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Dec 17, 2011·Revista española de geriatría y gerontología·Sergio Portal-NúñezPedro Esbrit
Nov 6, 2010·Journal of Biomedicine & Biotechnology·Ricardo J BoschPedro Esbrit
Jun 23, 2015·Cancers·Miriam Falzon, Vandanajay Bhatia
Jul 19, 2014·American Journal of Physiology. Gastrointestinal and Liver Physiology·Vandanajay BhatiaMiriam Falzon
Nov 17, 2017·American Journal of Physiology. Cell Physiology·Mazène HochaneMariette Barthelmebs

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