Acta Veterinaria et Zootechnica Sinica ›› 2021, Vol. 52 ›› Issue (12): 3512-3523.doi: 10.11843/j.issn.0366-6964.2021.012.018

• ANIMAL NUTRITION AND FEEDS • Previous Articles     Next Articles

Effects of Puerarin on Intestinal Barrier Function and Antioxidant Capacity of Broilers Fed with Oxidized Soybean Oil

YU Yingmei1,2, SHI Xuan1,2, OUYANG Jingxin1,2, LIU Sanfeng2, LI Guanhong1,2*   

  1. 1. Jiangxi Province Key Laboratory of Animal Nutrition/Jiangxi Province Key Innovation Center of Integration in Production and Education for High-quality and Safe Livestock and Poultry, Jiangxi Agricultural University, Nanchang 330045, China;
    2. College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China
  • Received:2021-05-04 Online:2021-12-25 Published:2021-12-22

Abstract: The experiment was conducted to investigate the effects of puerarin on mucosal morphology, mRNA expression of tight junction protein and antioxidant capacity of small intestine in yellow-feathered broilers fed oxidized soybean oil. The experiment was designed with 2×2 factors including oil quality (fresh soybean oil and oxidized soybean oil) and puerarin addition levels (0, 750 mg·kg-1). A total of 360 1-day-old healthy female yellow-feathered broilers were randomly divided into 4 treatment groups with 6 replicates per group and 15 chickens per replicate, which were fresh soybean oil diet group, fresh soybean oil + puerarin (750 mg·kg-1) diet group, oxidized soybean oil diet group and oxidized soybean oil + puerarin (750 mg·kg-1) diet group, respectively. At 28 and 56 days of age, one chicken per replicate was randomly selected, and the morphology of small intestinal mucosa, the mRNA expression of tight junction protein and antioxidant indices of small intestine mucosa were determined. The results showed that:1) Consumption of oxidized soybean oil significantly decreased villus height and villus height/crypt depth (V/C) in duodenum of 28-day-old broilers, V/C and mRNA expression levels of claudin-1 in ileum, villus height and V/C in three intestinal segments of 56-day-old broilers (P<0.05). Consumption of oxidized soybean oil significantly increased crypt depth of three intestinal segments at 56 days of age (P<0.05). Dietary supplementation of puerarin significantly increased villus height and V/C in jejunum and Zonula occluden1 (ZO-1) mRNA expression level in ileum of broilers at 28 days of age, and V/C in duodenum, jejunum and ileum and villus height in jejunum and ileum of broilers at 56 days of age (P<0.05), and significantly decreased crypt depth in three intestinal segments (P<0.05). 2) Oxidized soybean oil significantly increased the glutathione (GSH) content in duodenum and activity of glutathion peroxidase (GSH-Px)in jejunum at 28 days of age (P<0.05), and significantly decreased the GSH content, superoxide dismutase (SOD) activity and total antioxidant capacity (T-AOC) in ileum at 28 days of age (P<0.05). Dietary supplementation of puerarin significantly increased the activity of GSH-Px in duodenum of broilers at 28 days of age (P<0.05). Dietary oxidized soybean oil significantly decreased the activity of SOD and T-AOC in ileum at 56 days of age (P<0.05), dietary supplementation of puerarin significantly increased the activities of SOD in duodenum and ileum, and GSH-Px in ileum (P<0.05), and significantly decreased the content of GSH and the activity of SOD, T-AOC in jejunum and T-AOC in ileum (P<0.05) of broilers at 56 days of age. In conclusion, consumption of oxidized soybean oil damaged intestinal mucosal morphology and decreased the mRNA expression of tight junction protein and antioxidant capacity of small intestinal. Puerarin could increase the mRNA expression of tight junction protein in small intestinal mucosa of broilers, improve the morphological structure of intestinal mucosa under oxidative injury, increase the activity of antioxidant enzymes and enhance the antioxidant capacity of broilers.

Key words: puerarin, oxidized soybean oil, broilers, mucosal morphology, antioxidant capacity, tight junction protein

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