Dietary n-3 polyunsaturated fatty acids intervention ameliorates cognitive dysfunction in db/db mice by mitigating cortical insulin resistance, mitochondrial dysfunction, and energy metabolism impairment

作者：Yü Liu, Xiaojun Ma, Jingjing Xu, Xixiang Wang, Lu Liu, Xiuwen Ren, Chi Zhang, Shaobo Zhou, Ying Wang, Xinjing Guo, Linhong Yuan · 发表于：Journal of Advanced Research · 年份：2025 · DOI：10.1016/j.jare.2025.06.044 · 被引用次数：8 · 研究领域：Fatty Acid Research and Health、Diet and metabolism studies、Nutritional Studies and Diet

INTRODUCTION: Cognitive dysfunction is a prevalent complication associated with Type 2 Diabetes Mellitus (T2DM). Cognitive dysfunction in patients with T2DM not only severely impacts their quality of life but also imposes a substantial burden on their families and society. Despite the increasing prevalence of T2DM and its associated cognitive dysfunction, the underlying mechanisms remain incompletely understood, and effective treatment strategies are still lacking. This creates an urgent need for in-depth research to clarify these mechanisms and develop novel therapeutic approaches. OBJECTIVES: This study aims to investigate the ameliorating effects of dietary n-3 polyunsaturated fatty acids (n-3 PUFA) on diabetes-related cognitive dysfunction and its underlying mechanisms. METHODS: In this study, we employed multiple mouse models of diabetes and cognitive impairment to explore the impact of disrupted glucose metabolism on central insulin signaling pathways and mitochondrial function. Furthermore, we treated db/db mice with n-3 PUFA-enriched diets and assessed the effects of n-3 PUFA on insulin signaling pathways, mitochondrial function, and cognitive function to elucidate the mechanisms by which n-3 PUFA mitigate diabetes-related cognitive dysfunction. The expression levels of target proteins and genes were detected using western blot, immunohistochemistry, and reverse transcription-polymerase chain reaction. Cognitive function was evaluated using the Morris water maze test,...