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Diabetes-induced apoptosis in rat kidney
1Department of Biological Chemistry and Genetics, University of Texas Medical Branch, Galveston 77555-0647, USA.
Biochemical and Molecular Medicine
|June 1, 1997
Summary
Increased oxidative stress in diabetic rat kidneys leads to significant apoptosis, a key factor in the development of diabetic nephropathy. This study highlights the role of oxidative stress in kidney cell death.
Area of Science:
- Nephrology
- Molecular Biology
- Biochemistry
Background:
- Diabetic nephropathy is a significant complication of diabetes.
- The precise mechanisms underlying diabetic nephropathy remain incompletely understood.
- Oxidative stress is implicated in the pathogenesis of diabetic complications.
Purpose of the Study:
- To investigate the occurrence of apoptosis in the kidneys of diabetic rats.
- To determine the relationship between oxidative stress and apoptosis in diabetic nephropathy.
Main Methods:
- Oxidative stress was quantified using thiobarbituric acid reactive substances (TBARS) assay.
- Apoptosis was assessed via DNA fragmentation using enzyme-linked immunoassay and in situ end labeling (Apoptag).
Main Results:
- TBARS levels were significantly elevated in diabetic rat kidneys compared to controls (3.83 vs. 2.00 mumol/mg protein, P < 0.05).
- DNA fragmentation increased approximately fourfold in diabetic kidneys.
- Apoptag labeling revealed significant apoptosis in diabetic kidneys, unlike in control kidneys.
Conclusions:
- Increased oxidative stress in diabetic kidneys is associated with elevated apoptosis.
- Apoptosis induced by oxidative stress may contribute to the development of diabetic nephropathy.