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Oxidative stress in diabetic nephropathy: basic and clinical information
1Hyonam Kidney Laboratory, Soon Chun Hyang University, 657 Hannam-dong, Yongsan-ku, Seoul 140-743, Korea.
Current Diabetes Reports
|March 20, 2003
Summary
Reactive oxygen species (ROS) are key intracellular messengers in diabetic nephropathy development. Understanding ROS signaling pathways in kidney cells is crucial for developing effective treatments for this condition.
Area of Science:
- Nephrology
- Cell Biology
- Biochemistry
Background:
- Oxidative stress is implicated in diabetic nephropathy pathogenesis.
- Intracellular signaling pathways regulated by reactive oxygen species (ROS) in this context remain unclear.
Purpose of the Study:
- To elucidate the role of ROS as intracellular messengers in high glucose-induced diabetic nephropathy.
- To define the signaling pathways activated by ROS in glomerular mesangial cells.
Main Methods:
- Investigated the effects of high glucose (HG) on ROS production in mesangial cells.
- Analyzed the upregulation of specific proteins (TGF-β1, PAI-1, ECM) and activation of signaling molecules (PKC, MAPKs, NF-κB, AP-1, Sp1) by ROS.
- Assessed the impact of antioxidants on mesangial cell activation and diabetic nephropathy features.
Main Results:
- High glucose directly and indirectly increases intracellular ROS.
- ROS mimic HG effects, upregulating TGF-β1, PAI-1, and ECM proteins, leading to mesangial expansion.
- ROS activate key signaling molecules and transcription factors, promoting gene transcription for cytokines, growth factors, and ECM proteins.
Conclusions:
- ROS act as integral glucose-signaling molecules in glomerular mesangial cells during diabetic nephropathy.
- ROS play a significant role in the pathogenesis of diabetic nephropathy.
- Further research into ROS downstream signaling is vital for developing targeted therapies for diabetic nephropathy.