Ang II induce kidney damage by recruiting inflammatory cells and up regulates PPAR gamma and Renin 1 gene: effect of β carotene on chronic renal damage

J Thromb Thrombolysis. 2013 Oct;36(3):277-85. doi: 10.1007/s11239-012-0835-2.

Abstract

Antioxidants are widely used for prevention of diseases associated with oxidative stress and ischemic disorder. We investigated the hypothesis of antioxidants (α-tocopherol and β-carotene) can suppress the renal disorder in apo E-/-mice. Renal damage induced by chronic infusion of Angiotensin II (Ang II) into 4 month old male apo E-/-mice. After that the mice were treated with diet enriched α tocopherol and β carotene (800 mg/kg) for 150 days. Ang II treated kidney showed polycystic appearance with accumulation of clear fluid and constriction of renal artery and renal vein was noticed. Vacuolar/cystic degeneration as well as inflammatory reactions was noticed in the tubules/glomerulus of Ang II treated mice. β carotene treated mice showed enormous numbers of regenerated tubules in the kidney and over expression of ICAM proteins in the regenerated tubules. CD 45.2, MAC 3 proteins were over expressed in the inflammatory cells infiltrated into the tubular region of Ang II treated kidney. Gene expression studies revealed up regulation of Renin 1 (Ren 1) and PPARγ genes in the kidney of Ang II treated animals, but the β carotene treatment controlled the expression of these genes in the regenerated kidneys. β carotene may have protective effective on chronic renal disorder. It may repress the inflammatory genes (Ren 1, PPARγ) to achieve the protective effect on Ang II induced renal damage.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Angiotensin II / adverse effects*
  • Angiotensin II / genetics
  • Angiotensin II / pharmacology
  • Animals
  • Apolipoproteins E / genetics
  • Apolipoproteins E / metabolism
  • Cell Movement / drug effects*
  • Female
  • Inflammation / chemically induced
  • Inflammation / genetics
  • Inflammation / metabolism
  • Inflammation / pathology
  • Kidney Glomerulus / injuries
  • Kidney Glomerulus / metabolism
  • Kidney Glomerulus / pathology
  • Kidney Tubules, Proximal / injuries
  • Kidney Tubules, Proximal / metabolism
  • Kidney Tubules, Proximal / pathology
  • Male
  • Mice
  • Mice, Knockout
  • PPAR gamma / genetics
  • PPAR gamma / metabolism*
  • Polycystic Kidney Diseases / chemically induced
  • Polycystic Kidney Diseases / genetics
  • Polycystic Kidney Diseases / metabolism
  • Polycystic Kidney Diseases / pathology
  • Renal Insufficiency, Chronic / chemically induced
  • Renal Insufficiency, Chronic / genetics
  • Renal Insufficiency, Chronic / metabolism*
  • Renal Insufficiency, Chronic / pathology
  • Renin / genetics
  • Renin / metabolism*
  • beta Carotene / pharmacology*

Substances

  • Apolipoproteins E
  • PPAR gamma
  • beta Carotene
  • Angiotensin II
  • Renin