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https://doi.org/10.5713/ab.22.0261    [Accepted] Published online November 14, 2022.
Effects of essential oil coated with glycerol monolaurate on growth performance, intestinal morphology, and serum profiles in weaned piglets
Yanan Wang1  , Juntao Li1  , Huakai Wang1  , Yihai Mi1  , Yongqiang Xue2  , Jiaan Li2  , Yongxi Ma1,* 
1State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
2Biotechnology (Wuhan) Co., LTD., Wuhan 430073, China
Correspondence:  Yongxi Ma, Tel: +86-1062733588, Fax: +86-1061733688, Email: mayongxi2005@163.com
Received: 5 July 2022   • Revised: 4 August 2022   • Accepted: 30 October 2022
Abstract
Objective
This study aimed to investigate the effects of essential oil coated with glycerol monolaurate (GML) on the growth performance, intestinal morphology, and serum profiles of weaned piglets.
Methods
A total of 144 weaned piglets [Duroc × (Landrace × Yorkshire), average weight 8.07 ± 3.33 kg] were randomly assigned to three groups with six replicate pens and eight piglets per pen: (1) CON: a corn-soybean basal diet; (2) LEG: with 1,000 mg/kg essential oil coated with GML; and (3) HEG: with 2,000 mg/kg essential oil coated with GML.
Results
Results showed that average daily gain was increased (p < 0.05) linearly by essential oil coated with GML supplementation on day 14-28 and day 0 to 28 compared with the CON group. Dietary supplementation with HEG increased (p < 0.05) total antioxidant capacity and catalase activity on day 14, and immunoglobulin A (IgA) and IgM concentration on day 28 and tended to increase IgG on day 28. In addition, the crypt depth in the jejunum was reduced (p < 0.05), and villus height and villus height/crypt depth in the ileum were increased (p < 0.05) in the HEG group compared with the CON group. Moreover, lower (p < 0.05) concentrations of tumor necrosis factor-α, interferon-γ, interleukin-1β (IL-1β), IL-8, and IL-10 were observed in the jejunum of piglets supplemented with HEG compared with the CON group. In addition, dietary HEG tended to decrease IL-6 level in the jejunum of piglets compared with the CON group.
Conclusion
Dietary essential oil coated with GML can improve growth performance of weaned piglets. Moreover, supplementing 2,000 mg/kg essential oil coated with GML was demonstrated to improve antioxidant ability, and intestinal morphology, and reduce jejunal inflammatory factor levels.
Keywords: Antioxidant Capacity; Essential Oil; Glycerol Monolaurate; Immunity Function; Piglets


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