Uridine Alleviates High-carbohydrate Diet-induced Metabolic Syndromes by Activating /AMPK Signaling Pathway and Promoting Glycogen Synthesis in Nile Tilapia ()

Overview

Journal Anim Nutr

Date 2023 May 30

PMID 37252330

Authors

Nan-Nan Zhou

Tong Wang

Yu-Xin Lin

Rong Xu

Hong-Xia Wu

Fei-Fei Ding

Fang Qiao

Zhen-Yu Du

Mei-Ling Zhang

Affiliations

Soon will be listed here.

Abstract

Carbohydrates have a protein sparing effect, but long-term feeding of a high-carbohydrate diet (HCD) leads to metabolic disorders due to the limited utilization efficiency of carbohydrates in fish. How to mitigate the negative effects induced by HCD is crucial for the rapid development of aquaculture. Uridine is a pyrimidine nucleoside that plays a vital role in regulating lipid and glucose metabolism, but whether uridine can alleviate metabolic syndromes induced by HCD remains unknown. In this study, a total of 480 Nile tilapia () (average initial weight 5.02 ± 0.03 g) were fed with 4 diets, including a control diet (CON), HCD, HCD + 500 mg/kg uridine (HCUL) and HCD + 5,000 mg/kg uridine (HCUH), for 8 weeks. The results showed that addition of uridine decreased hepatic lipid, serum glucose, triglyceride and cholesterol ( < 0.05). Further analysis indicated that higher concentration of uridine activated the sirtuin1 ()/adenosine 5-monophosphate-activated protein kinase (AMPK) signaling pathway to increase lipid catabolism and glycolysis while decreasing lipogenesis ( < 0.05). Besides, uridine increased the activity of glycogen synthesis-related enzymes ( < 0.05). This study suggested that uridine could alleviate HCD-induced metabolic syndrome by activating the /AMPK signaling pathway and promoting glycogen synthesis. This finding reveals the function of uridine in fish metabolism and facilitates the development of new additives in aquatic feeds.

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