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Role of reactive oxygen species in the pathogenesis of diabetic nephropathy

Hunjoo Ha1, In-A Hwang, Jong Hee Park

  • 1College of Pharmacy and Division of Life & Pharmaceutical Sciences, Graduate School, Ewha Woman's University, Seoul, Republic of Korea.

Diabetes Research and Clinical Practice
|October 11, 2008
PubMed

Insights

Reactive oxygen species (ROS) contribute to diabetic complications by damaging cells and amplifying harmful signals. Strategies to control blood sugar and reduce ROS may prevent kidney disease in diabetes.

Area of Science:

  • Biochemistry
  • Cell Biology
  • Nephrology

Background:

  • Reactive oxygen species (ROS) are increasingly implicated in the pathogenesis of diabetic complications.
  • Diabetes is characterized by increased oxidative stress and overproduction of ROS, primarily due to hyperglycemia.
  • Vascular cells, including renal cells, generate ROS under hyperglycemic conditions.

Purpose of the Study:

  • To elucidate the role of ROS in hyperglycemia-induced renal cell dysfunction and diabetic nephropathy.
  • To explore the mechanisms by which ROS contribute to the progression of kidney disease in diabetes.
  • To evaluate potential therapeutic strategies targeting ROS for the prevention of diabetic nephropathy.

Main Methods:

  • Investigated ROS generation in renal cells under hyperglycemic conditions.
  • Examined the involvement of NADPH oxidase and mitochondrial electron transport chain in ROS production.
  • Analyzed the signaling pathways activated by ROS, including transcription factors and profibrotic gene expression.
  • Evaluated the effects of glycemic control, angiotensin II inhibition, and antioxidants on diabetic nephropathy development.

Main Results:

  • Hyperglycemia leads to increased ROS production in renal cells via NADPH oxidase and mitochondrial pathways.
  • ROS act as signaling molecules, activating cascades that promote profibrotic gene expression in the kidney.
  • ROS can amplify their own signaling, exacerbating cellular damage.
  • Intensive glycemic control and angiotensin II inhibition mitigate ROS overproduction and delay diabetic nephropathy.
  • Antioxidant therapies show potential in preventing or delaying the onset of diabetic nephropathy.

Conclusions:

  • ROS play a critical role in the development and progression of diabetic nephropathy.
  • Targeting ROS production and enhancing ROS removal are promising therapeutic strategies for diabetic kidney disease.
  • Combined approaches to manage hyperglycemia and oxidative stress may effectively prevent diabetic nephropathy.

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