文章基本信息

标题：Effects of Long-Term DHA Supplementation and Physical Exercise on Non-Alcoholic Fatty Liver Development in Obese Aged Female Mice
本地全文：下载
作者：Jinchunzi Yang ; Neira Sáinz ; Elisa Félix-Soriano 等
期刊名称：Nutrients
电子版ISSN：2072-6643
出版年度：2021
卷号：13
期号：2
页码：501
DOI：10.3390/nu13020501
出版社：MDPI Publishing
摘要：Obesity and aging are associated to non-alcoholic fatty liver disease (NAFLD) development. Here, we investigate whether long-term feeding with a docosahexaenoic acid (DHA)-enriched diet and aerobic exercise, alone or in combination, are effective in ameliorating NAFLD in aged obese mice. Two-month-old female C57BL/6J mice received control or high fat diet (HFD) for 4 months. Then, the diet-induced obese (DIO) mice were distributed into four groups: DIO, DIO DHA (15% dietary lipids replaced by a DHA-rich concentrate), DIO EX (treadmill running), and DIO DHA EX up to 18 months. The DHA-rich diet reduced liver steatosis in DIO mice, decreasing lipogenic genes (Dgat2, Scd1, Srebp1c), and upregulated lipid catabolism genes (Hsl/Acox) expression. A similar pattern was observed in the DIO EX group. The combination of DHA exercise potentiated an increase in Cpt1a and Ppara genes, and AMPK activation, key regulators of fatty acid oxidation. Exercise, alone or in combination with DHA, significantly reversed the induction of proinflammatory genes (Mcp1, Il6, Tnfα, Tlr4) in DIO mice. DHA supplementation was effective in preventing the alterations induced by the HFD in endoplasmic reticulum stress-related genes (Ern1/Xbp1) and autophagy markers (LC3II/I ratio, p62, Atg7). In summary, long-term DHA supplementation and/or exercise could be helpful to delay NAFLD progression during aging in obesity.
关键词：obesity; aging; non-alcoholic fatty liver; omega-3 fatty acids; exercise; lipogenesis; fatty acid oxidation; inflammation; ER stress; autophagy obesity ; aging ; non-alcoholic fatty liver ; omega-3 fatty acids ; exercise ; lipogenesis ; fatty acid oxidation ; inflammation ; ER stress ; autophagy