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The two faces of reactive oxygen species (ROS) in adipocyte function and dysfunction
Biological Chemistry
|April 1, 2016
Summary
Maintaining a balance of reactive oxygen species (ROS) is crucial for white adipose tissue (WAT) function. Both excessive and insufficient ROS levels impair WAT, contributing to insulin resistance and metabolic dysfunction.
Area of Science:
- Endocrinology and Metabolism
- Cellular Physiology
- Nutritional Science
Background:
- White adipose tissue (WAT) regulates energy homeostasis through lipid storage and adipokine secretion.
- WAT dysfunction is linked to metabolic syndrome (MetS) and type 2 diabetes (T2D).
- The role of reactive oxygen species (ROS) in WAT dysfunction and T2D remains controversial, despite observed oxidative stress in T2D patients.
Purpose of the Study:
- To discuss the multifaceted contribution of ROS to adipocyte function and differentiation.
- To highlight the sources and nutritional modulators of ROS within adipocytes.
- To explore the signaling mechanisms by which ROS influence adipogenesis and mature fat cell function.
Main Methods:
- Literature review and conceptual synthesis.
- Discussion of existing animal and clinical data regarding ROS and T2D.
- Analysis of signaling pathways involved in adipocyte ROS production and function.
Main Results:
- ROS play a critical role in the signaling pathways governing adipocyte differentiation and function.
- Both increased and decreased ROS levels, including those from antioxidant over-supplementation, can lead to WAT dysfunction.
- A concept of ROS balance is proposed as essential for normal WAT physiology.
Conclusions:
- Normal WAT function requires a delicate balance of reactive oxygen species (ROS).
- Deviations from this ROS balance, whether excessive or deficient, contribute to WAT dysfunction and insulin resistance.
- Understanding ROS modulation is key for addressing metabolic disorders associated with adipose tissue.
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