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Asian-Australas J Anim Sci > Accepted Articles
DOI: https://doi.org/10.5713/ajas.18.0414    [Accepted] Published online October 26, 2018.
Effects of coated cysteamine hydrochloride on muscle fiber characteristics and amino acid composition of finishing pigs
Miaomiao Bai1,2, Hongnan Liu1,3,4,*, Kang Xu1,3,4, Rong Yu3, Abimbola Oladele Oso5, Jinping Deng2, Yulong Yin1,2,3,4,*
1Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central, Ministry of Agriculture, Hunan Provincial Engineering Research Center for Healthy Breeding of Livestock and Poultry, Key Laboratory of Agro-ecological Processes in Subtropical Region, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China
2College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, China
3Hangzhou King Techina Technology Company Academician Expert Workstation, Hangzhou King Techina Technology Co., Ltd., Hangzhou 311107, China
4Hunan Co-Innovation Center of Animal Production Safety, CICAPS, Changsha, Hunan, China
5Department of Animal Nutrition, College of Animal Science and Livestock Production, Federal University of Agriculture, Abeokuta PMB 2240, Nigeria
Correspondence:  Hongnan Liu,Email: liuhn@isa.ac.cn
Yulong Yin,Email: yinyulong@isa.ac.cn
Received: 1 June 2018   • Revised: 15 August 2018   • Accepted: 28 September 2018
This experiment was designed to determine the effects of coated cysteamine hydrochloride (CC) on muscle fiber characteristics, amino acid composition and transporters gene expression in the <i>longissimus dorsi muscle</i> (LDM) of finishing pigs.
Two hundred and sixteen Duroc/Landrace/Yorkshire cross-bred male finishing pigs were fed with a corn-soybean basal diet supplemented with 0, 70 and 140 mg/kg cysteamine. Each group contained eight replicates of nine pigs per replicate. After 29 days, one pig was randomly selected from each replicate and slaughtered. Blood and <i>LDM</i> samples were collected and analyzed.
The results showed that supplemental dietary CC increased (P < 0.05) the muscle fiber density. And CC supplementation also up-regulated (P < 0.05) the expression of MyHC1 and MyHC2x mRNA levels, and down-regulated (P < 0.05) MyHC2b expression in the <i>LDM</i>. Additionally, supplemental dietary CC reduced (P < 0.05) the concentration of total cholesterol in the plasma and enhanced (P < 0.05) the concentrations of essential amino acid and total amino acid in the <i>LDM</i>. The relative expression levels of CAT2, b0,+AT, and y+LAT1 were up-regulated (P < 0.05) in the <i>LDM</i> when pigs were fed with the dietary CC of 70 mg/kg.
Cysteamine supplementation could increase fiber density and distribution of fiber types. It also improved the deposition of protein in the <i>LDM</i> by up-regulated the expression of amino acid transporters.
Keywords: Coated Cysteamine Hydrochloride; Finishing Pigs; Muscle Fiber; Amino Acids

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