Acta Veterinaria et Zootechnica Sinica ›› 2024, Vol. 55 ›› Issue (12): 5825-5838.doi: 10.11843/j.issn.0366-6964.2024.12.044

• Clinical Veterinary Medicine • Previous Articles     Next Articles

Effects of Modified Zhizhu Powder on Intestinal Mucosal Barrier and Antioxidant Capacity of Weaned Rabbits

JIN Ruwen1,2(), WANG Yingjie1(), JIANG Quanxing1(), LIU Tianqiang3, DENG Yang4, LUO Jie5, ZHAO Ling1, YE Gang1, SHI Fei1, LI Yinglun1, TANG Huaqiao1,*()   

  1. 1. College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, China
    2. Sichuan Chuanlong Dongke Pharmaceutical Co., Ltd., Chengdu 611230, China
    3. Tongwei Agricultural Development Co., Ltd., Chengdu 610041, China
    4. Chengdu Animal Genetic Resources Protection Center, Chengdu 610081, China
    5. Tongren Polytechnic College, Tongren 554300, China
  • Received:2023-03-02 Online:2024-12-23 Published:2024-12-27
  • Contact: TANG Huaqiao E-mail:jingruwen123@163.com;1764720963@qq.com;jiangquanxing27@163.com;turtletang@163.com

Abstract:

The study aimed to investigate the effects of Modified Zhizhu Powder on the ileal intestinal mucosal barrier of weaned rabbits, with the goal of providing new ideas for the prevention and treatment of diarrhea diseases in weaned rabbits. Ninety 35-day-old New Zealand white rabbits, with similar body weights, were randomly divided into 5 groups, based on the principle of 50/50 male and female. Rabbits in control group were fed a basal diet, Enrofloxacin group, low-dose group, medium-dose group and high-dose group were fed the basal diet supplemented with 0.2% Enrofloxacin powder and 0.1%, 0.3% and 0.5% Modified Zhizhu Powder, respectively. The pre-test lasted for 7 days, and the formal test lasted for 14 days. The integrity of the intestinal barrier and its antioxidant capacity were measured after the experiment. The results showed that adding Modified Zhizhu Powder could significantly reduce the intestinal pathological tissue score (P < 0.05). Compared with the blank group, the other treatment groups all significantly increased the relative expression level of ZO2 (zonula occludens protein 2) mRNA in the ileum (P < 0.001). The high-dose group significantly increased the mRNA levels of Occludin, claudin, ZO1 (zonula occludens protein 1), ZO2, andJAM2 (junctional adhesion molecule 2) (P < 0.001). Modified Zhizhu Powder significantly increased the expression of MUC2 (Mucin 2) protein in the ileum (P < 0.05) and the high-dose group significantly reduced MPO (myeloperoxidase) activity (P < 0.01). Modified Zhizhu Powder high-doce group could significantly enhance the secretion of sIgA, reduce the levels of pro-inflammatory cytokinesIL-1β, IL-2, IL-6, andTNF-α, and increase the levels of anti-inflammatory cytokinesIL-10 andTGF-β. Modified Zhizhu Powder could also improve the activity of antioxidant enzymes (SOD, GSH, T-AOC, CAT). In conclusion, the Modified Zhizhu Powder could effectively improve the morphology and structure of the ileum of weaned rabbits, strengthen the tight connection between intestinal cells, maintain the permeability of intestinal mucosa, reduce the inflammatory response of the intestinal tract, enhance the function of the intestinal mucosal barrier, and play an antioxidant role, which can have a positive effect on the use of substitute antibodies.

Key words: weaning diarrhea of young rabbits, Modified Zhizhu Powder, intestinal mucosal barrier, inflammatory response, antioxidation

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