Hormonal
Palmitate (a saturated free fatty acid) induces oxidative stress and endoplasmic reticulum (ER) calcium depletion, triggering a vicious cycle of mitochondrial dysfunction and apoptosis that leads to pancreatic beta-cell failure and insulin resistance.
High levels of saturated fats (specifically palmitate) in the blood can overwhelm cellular machinery, causing stress that damages insulin-producing cells and reduces insulin sensitivity. This risk is heightened in people with existing insulin resistance. However, not all fats behave this way; unsaturated fats (like oleate) can mitigate this damage. Managing saturated fat intake and maintaining a healthy weight to lower circulating free fatty acids are key strategies to prevent this cellular stress cycle.
This vicious cycle of lipotoxicity occurs in multiple tissues, resulting in β-cell failure and insulin resistance in target tissues, and further aggravates diabetic complications.
Why this rating
The paper is a comprehensive review citing numerous primary studies across multiple cell types and animal models, though it lacks a single large-scale human clinical trial.
Source
Oxidative stress and calcium dysregulation by palmitate in type 2 diabetes
Luong Dai Ly et al. · Experimental & Molecular Medicine · 2017
DOI 10.1038/emm.2016.157
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