α-Tocopherol modulates lipoprotein cytotoxicity in obstructive nephropathy
| Autor: | Richard J. Krieg, Edward P. Norkus, C C Schwartz, Nancy B. Kuemmerle, Pablo Saborio, James C.M. Chan |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Male
medicine.medical_specialty Cell Survival Kidney urologic and male genital diseases medicine.disease_cause Nephropathy Rats Sprague-Dawley Lipid peroxidation chemistry.chemical_compound Malondialdehyde Internal medicine medicine Animals Humans Vitamin E Cytotoxins urogenital system Cholesterol business.industry medicine.disease female genital diseases and pregnancy complications Glomerular Mesangium Rats Lipoproteins LDL Oxidative Stress Endocrinology medicine.anatomical_structure chemistry Nephrology Dietary Supplements Pediatrics Perinatology and Child Health lipids (amino acids peptides and proteins) Lipid Peroxidation business Oxidative stress Ureteral Obstruction Transforming growth factor Lipoprotein |
| Zdroj: | Pediatric Nephrology. 14:740-746 |
| ISSN: | 0931-041X |
| Popis: | Oxidative stress in unilateral ureteral obstruction (UUO) contributes to the development of glomerular and tubulointerstitial lesions. The present study investigated whether oxidized low-density lipoprotein (oLDL) contributes to the pathogenesis of kidney injury in UUO, and whether alpha-tocopherol modulates such cytotoxicity and promotes repair. Male Sprague-Dawley rats weighing 100-125 g were assigned to three groups of 6 animals each: (1) sham, regular chow; (2) UUO, regular chow; and (3) UUO, alpha-tocopherol supplementation. We found a significant increase in the level of oxidative stress in the UUO group as measured by malondialdehyde (MDA) content in both plasma and kidneys. The LDL isolated from this group was cytotoxic to rat mesangial cells. The level of oxidation and cytotoxicity was significantly reduced when animals were treated with alpha-tocopherol. Plasma cholesterol concentration, kidney MDA, and transforming growth factor beta1 mRNA expression were all significantly increased in the UUO animals, and partially reduced in alpha-tocopherol-treated animals. Our data suggest that oxidative modification of LDL is associated with the renal injury in UUO. Taken together, our data support the concept that alpha-tocopherol can modulate LDL oxidation and its cytotoxic effects on rat mesangial cells in vitro. |
| Databáze: | OpenAIRE |
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