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Reactive oxygen species amplify glucose signalling in renal cells cultured under high glucose and in diabetic kidney
- Title
- Reactive oxygen species amplify glucose signalling in renal cells cultured under high glucose and in diabetic kidney
- Authors
- Ha H.; Lee H.B.
- Ewha Authors
- 하헌주
- SCOPUS Author ID
- 하헌주
- Issue Date
- 2005
- Journal Title
- Nephrology
- ISSN
- 1320-5358
- Citation
- Nephrology vol. 10, no. SUPPL. 2, pp. S7 - S10
- Indexed
- SCIE; SCOPUS
- Document Type
- Conference Paper
- Abstract
- Diabetic nephropathy is characterized by excessive accumulation of extracellular matrix (ECM) in the kidney. Reactive oxygen species (ROS) play a central role in the ECM synthesis and degradation in the glomeruli and tubulointerstitium leading to renal fibrosis. High glucose (HG) induces cellular ROS through protein kinase C (PKC)-dependent activation of NADPH oxidase and through mitochondrial metabolism. ROS thus generated activate signal transduction cascade (PKC, mitogen-activated protein kinases, and Janus kinase/signal transducers and activators of transcription) and transcription factors (nuclear factor-κB, activated protein-1, and specificity protein-1), up-regulate transforming growth factor-β1 (TGF-β1), angiotensin II (Ang II), monocyte chemoattractant protein-1 (MCP-1), and plasminogen activator inhibitor-1 (PAI-1) gene and protein expression, and promote formation of advanced glycation end-products (AGE). PKC, TGF-β1, Ang II, and AGE also induce cellular ROS and signal through ROS leading to enhanced ECM synthesis. NF-κB-MCP-1 pathway is activated by ROS and promotes monocyte recruitment and profibrotic process in the kidney. HG- and TGF-β1-induced PAI-1 up-regulation is mediated by ROS and contribute to ECM accumulation via suppression of plasmin ativity. TGF-β1-induced myofibroblast transformation of renal tubular epithelial cells (epithelial-mesenchymal transition) is also mediated by ROS and contribute to tubulointerstitial fibrosis. In summary, ROS transduce and amplify glucose signalling in renal cells under high glucose environment and play a critical role in excessive ECM deposition in the diabetic kidney. A better understanding of ROS production and removal will allow more effective therapeutic strategies in diabetic renal and other vascular complications. © 2005 Asian Pacific Society of Nephrology.
- DOI
- 10.1111/j.1440-1797.2005.00448.x
- Appears in Collections:
- 약학대학 > 약학과 > Journal papers
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