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A Zebrafish Model of Diabetes Mellitus and Metabolic Memory
Published on: February 28, 2013
Targeting Select Cellular Stress Pathways to Prevent Hyperglycemia-Related Complications: Shifting the Paradigm
1Department of Medicine, University of Florida College of Medicine, 653-1 West Eighth Street, Jacksonville, FL, 32209, USA. arshag.mooradian@jax.ufl.edu.
Abstract:
Despite the advances made in preventing complications of diabetes, there is still substantial residual risk. Hence the need for developing new therapeutic agents that target the various facets of the pathogenesis of complications in people with diabetes. Traditionally four general biochemical pathways had been recognized as major contributors to glucotoxicity. These include the polyol pathway, the protein kinase C (PKC) pathway, glycosylation pathway, and oxidative stress. The latter has been proposed as a common impetus of the other pathways of glucotoxicity. More recently, the cross talk between oxidative stress and other recognized cellular stresses such as endoplasmic reticulum (ER), inflammatory, and mitochondrial stresses has emerged as an important additional mechanism of glucotoxicity. The observation that targeting oxidative stress with antioxidants has been associated with unfavorable clinical outcomes and the recognition that in cell cultures antioxidants may aggravate ER stress, suggests that selective targeting of individual cellular stresses may not be sufficient for preventing glucotoxicity. Future efforts should focus on developing therapeutic agents that can ameliorate cellular stress globally by simultaneously targeting the oxidative, ER, mitochondrial, and inflammatory stresses.
Insights
New diabetes therapies should target multiple cellular stresses, not just oxidative stress. Addressing oxidative, ER, mitochondrial, and inflammatory stresses simultaneously offers a more effective approach to preventing diabetic complications.
Area of Science:
- Biochemistry
- Cellular Biology
- Diabetology
Background:
- Despite advances, diabetes complications pose significant risks.
- Glucotoxicity involves polyol, protein kinase C (PKC), glycosylation, and oxidative stress pathways.
- Emerging research highlights crosstalk between oxidative stress and ER, inflammatory, and mitochondrial stresses.
Purpose of the Study:
- To review the multifaceted pathogenesis of diabetic complications.
- To evaluate the limitations of targeting individual stress pathways.
- To propose a novel therapeutic strategy for diabetic complications.
Main Methods:
- Literature review of biochemical pathways contributing to glucotoxicity.
- Analysis of the role of cellular stress crosstalk in diabetes.
- Evaluation of antioxidant therapy outcomes in diabetic research.
Main Results:
- Oxidative stress is a central but not sole contributor to glucotoxicity.
- Targeting only oxidative stress with antioxidants has yielded unfavorable clinical outcomes.
- Antioxidants may exacerbate endoplasmic reticulum (ER) stress in certain contexts.
Conclusions:
- Selective targeting of individual cellular stresses is insufficient for preventing diabetic complications.
- Future therapeutic agents should aim to globally ameliorate cellular stress.
- Simultaneous targeting of oxidative, ER, mitochondrial, and inflammatory stresses is a promising strategy.
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