Effects of dietary l‐theanine supplementation on pork quality and muscle fiber type transformation in finishing pigs

乳酸脱氢酶 肌肉纤维 茶氨酸 化学 食品科学 合成代谢 肌球蛋白 安普克 动物科学 纤维类型 蛋白激酶A 内分泌学 生物化学 生物 内科学 激酶 骨骼肌 医学 绿茶
作者
Hanna Dai,Xiaoling Chen,Daiwen Chen,Bing Yu,Jun He,Hong Chen,Hui Yan,Ping Zheng,Yuheng Luo,Zhiqing Huang
出处
期刊:Journal of the Science of Food and Agriculture [Wiley]
卷期号:103 (4): 2106-2115 被引量:4
标识
DOI:10.1002/jsfa.12368
摘要

This experiment aimed to investigate effects of dietary l-theanine supplementation on pork quality and muscle fiber type transformation in finishing pigs. In a 30-day experiment, 18 healthy Duroc × Landrace × Yorkshire (DLY) pigs with an average body weight of 86.03 ± 0.83 kg were randomly divided into three groups (a basal diet or a basal diet supplemented with 500 and 1000 ppm l-theanine, respectively), with six duplicates and one pig per replicate.The results showed that dietary 1000 ppm l-theanine supplementation significantly reduced (P < 0.05) b*24 h and drip loss. Dietary 1000 ppm l-theanine supplementation significantly increased (P < 0.05) slow myosin heavy chain (MyHC) protein expression and the percentage of slow-twitch fibers, as well as significantly decreased (P < 0.05) fast MyHC protein expression and the percentage of fast-twitch fibers, accompanied by an increase in succinate dehydrogenase (SDH) and malate dehydrogenase (MDH) activities and a decrease in lactate dehydrogenase (LDH) activity. In addition, the adenosine monophosphate (AMP)-activated protein kinase (AMPK) signaling pathway was activated by l-theanine.Together, this study demonstrated for the first time that dietary supplementation of 1000 ppm l-theanine can improve pork color and drip loss and promote muscle fiber type transformation from fast-twitch to slow-twitch in finishing pigs. © 2022 Society of Chemical Industry.
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