Hormonal
Pancreatic beta cells are uniquely susceptible to oxidative stress and hypoxia-induced dysfunction because they express unusually low levels of antioxidant defense enzymes (such as catalase) while maintaining high metabolic activity and ROS production.
Beta cells are naturally vulnerable to damage from high blood sugar and fat levels because they lack strong internal antioxidant defenses. This vulnerability is a key reason why Type 2 Diabetes develops when metabolic demands are high. While oxidative stress contributes to this damage, simply taking antioxidant supplements has not been proven to prevent or treat diabetes in humans. The primary focus should remain on managing the root causes: reducing nutrient oversupply through diet and lifestyle changes to lower the metabolic load on beta cells.
enzymes involved in antioxidant defense are present at unusually low levels (103) or encoded by disallowed genes (152) in beta cells. As discussed below, this imbalance may render beta cells highly susceptible for damage induced by either oxidative stress or oxygen deprivation.
Why this rating
The paper is a comprehensive review citing multiple GWAS studies, animal models, and human islet data.
Source
The Role of Oxidative Stress and Hypoxia in Pancreatic Beta-Cell Dysfunction in Diabetes Mellitus
Philipp A. Gerber et al. · Antioxidants and Redox Signaling · 2016
DOI 10.1089/ars.2016.6755
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