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Extracellular matrix metabolism in diabetic nephropathy
Roger M Mason1, Nadia Abdel Wahab
1Cell and Molecular Biology Section, Division of Biomedical Sciences, Faculty of Medicine, Imperial College London, Exhibition Road, London SW7 2AZ, UK. roger.mason@imperial.ac.uk
Journal of the American Society of Nephrology : JASN
|April 23, 2003
Summary
Diabetic nephropathy involves excessive protein buildup in kidneys, driven by altered glucose metabolism and advanced glycation end products. These factors generate reactive oxygen species (ROS), impacting gene expression and kidney damage.
Area of Science:
- Nephrology
- Diabetology
- Molecular Biology
Background:
- Diabetic nephropathy is marked by extracellular matrix (ECM) protein accumulation in kidney glomeruli and tubules.
- This review focuses on the molecular mechanisms driving ECM deposition in diabetic kidney disease.
Purpose of the Study:
- To summarize key changes in glomerular mesangium and basement membrane protein composition.
- To explore the role of glucose metabolism and advanced glycation end products (AGEs) in initiating these changes.
- To discuss the involvement of reactive oxygen species (ROS) and downstream signaling in disease pathogenesis.
Main Methods:
- Review of existing literature on diabetic nephropathy.
- Analysis of molecular pathways linking glucose metabolism, AGEs, and ROS.
- Examination of gene expression changes related to ECM proteins and proteases.
Main Results:
- Altered glucose metabolism and AGE formation are identified as primary triggers in the mesangium.
- Both processes generate significant amounts of ROS.
- ROS activate intracellular signaling pathways, leading to redox-sensitive transcription factor activation.
Conclusions:
- Changes in gene expression of ECM proteins and their turnover systems are driven by ROS-mediated signaling.
- Understanding these pathways is crucial for developing targeted therapies for diabetic nephropathy.
- This review highlights the central role of oxidative stress in the progression of diabetic kidney disease.