Dietary sodium acetate improves high-fat diet utilization through promoting differential nutrients metabolism between liver and muscle in Nile tilapia (Oreochromis niloticus)

尼罗罗非鱼 生物 内科学 内分泌学 俄勒冈 脂质代谢 胰岛素 医学 渔业
作者
Wenhao Zhou,Samwel Mchele Limbu,Ruixin Li,Yuan Luo,Jiong Ren,Fang Qiao,Mei‐Ling Zhang,Zhen‐Yu Du
出处
期刊:Aquaculture [Elsevier BV]
卷期号:565: 739142-739142 被引量:31
标识
DOI:10.1016/j.aquaculture.2022.739142
摘要

High-fat diet (HFD) often causes many negative effects and impairs fish growth. Short-chain fatty acids (SCFAs) such as acetates modify metabolic disorders and regulate body homeostasis. However, the effects of sodium acetate on alleviating HFD in fish is currently unknown. This study investigated the role of using dietary sodium acetate to alleviate adverse effects caused by HFD in fish. Three replicates (thirty fish each) of 4.8 ± 0.30 g Nile tilapia (Oreochromis niloticus) were fed with control diet (Con), high-fat diet (HFD) or HFD containing sodium acetate diet (HFD + NaAc) for eight weeks. After the feeding trial, Nile tilapia fed with HFD increased significantly tissue lipid deposition, reduced insulin sensitivity and suppressed glucose and lipid metabolism in both liver and muscle, accompanied with signs of metabolic disorders and liver damage. Moreover, HFD feeding inhibited muscle protein synthesis and impaired fish growth performance. However, the fish fed on HFD + NaAc improved significantly oxidative stress, inflammation, apoptosis and injury in liver compared to those fed on HFD. More importantly, dietary sodium acetate supplementation enhanced insulin sensitivity, promoted glucose catabolic utilization and protein synthesis in muscle through activation of insulin and mTOR signaling pathways, respectively, and markedly improved the growth performance. In contrast, dietary sodium acetate promoted hepatic pentose phosphate pathway, hepatic glycogen accumulation, and activated lipid catabolism to alleviate hepatic lipid deposition. Our study illustrates that sodium acetate alleviates differentially the adverse effects induced by feeding Nile tilapia with HFD in muscle and liver. SCFAs such as acetate may be used for improving HFD utilization in fish nutrition.
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