Angiopoietin-1 therapy enhances fibrosis and inflammation following folic acid-induced acute renal injury

Kidney Int. 2008 Aug;74(3):300-9. doi: 10.1038/ki.2008.179. Epub 2008 May 14.


The loss of interstitial capillaries is a feature of several experimental models of renal disease and this contributes to secondary kidney injury. Angiopoietin-1 is a secreted growth factor which binds to Tie-2 present on endothelia to enhance cell survival thereby stabilizing capillary architecture in-vitro. Previous studies showed that angiopoietin-1 prevented renal capillary and interstitial lesions following experimental ureteric obstruction. We tested here the effect of angiopoietin-1 treatment on capillary loss and associated tubulointerstitial damage known to follow recovery from folic acid-induced tubular necrosis and acute renal injury. We found that delivery of angiopoietin-1 by adenoviral vectors stabilized peritubular capillaries in folic acid nephropathy but this was accompanied by profibrotic and inflammatory effects. These results suggest that the use of endothelial growth factor therapy for kidney disease may have varying outcomes that depend on the disease model tested.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adenoviridae / genetics
  • Angiopoietin-1 / administration & dosage
  • Angiopoietin-1 / adverse effects*
  • Angiopoietin-1 / therapeutic use
  • Animals
  • Disease Models, Animal
  • Fibrosis / chemically induced*
  • Folic Acid / adverse effects
  • Genetic Vectors
  • Inflammation / chemically induced*
  • Kidney Diseases / chemically induced
  • Kidney Diseases / drug therapy
  • Kidney Diseases / pathology
  • Kidney Tubular Necrosis, Acute / chemically induced
  • Kidney Tubular Necrosis, Acute / drug therapy*
  • Kidney Tubular Necrosis, Acute / pathology
  • Kidney Tubules / drug effects
  • Kidney Tubules / pathology
  • Male
  • Mice
  • Mice, Inbred C57BL
  • Renal Circulation / drug effects


  • Angiopoietin-1
  • Folic Acid