Host-derived Bacillus antagonistic novel duck reovirus infection by regulating gut microbiota-mediated immune responses.

Autor: Li L; College of Veterinary Medicine, Hebei Agricultural University, NO.2596 Lekai South Street, Baoding, Hebei 071000, China; Veterinary Biological Technology Innovation Centre of Hebei Province, Baoding, Hebei 071000, China., Ji L; College of Veterinary Medicine, Hebei Agricultural University, NO.2596 Lekai South Street, Baoding, Hebei 071000, China; Veterinary Biological Technology Innovation Centre of Hebei Province, Baoding, Hebei 071000, China., Chen J; College of Veterinary Medicine, Hebei Agricultural University, NO.2596 Lekai South Street, Baoding, Hebei 071000, China; Veterinary Biological Technology Innovation Centre of Hebei Province, Baoding, Hebei 071000, China., Hou S; College of Veterinary Medicine, Hebei Agricultural University, NO.2596 Lekai South Street, Baoding, Hebei 071000, China; Veterinary Biological Technology Innovation Centre of Hebei Province, Baoding, Hebei 071000, China., Yang Y; College of Veterinary Medicine, Hebei Agricultural University, NO.2596 Lekai South Street, Baoding, Hebei 071000, China; Veterinary Biological Technology Innovation Centre of Hebei Province, Baoding, Hebei 071000, China., Wang W; College of Veterinary Medicine, Hebei Agricultural University, NO.2596 Lekai South Street, Baoding, Hebei 071000, China; Veterinary Biological Technology Innovation Centre of Hebei Province, Baoding, Hebei 071000, China., Lei B; College of Veterinary Medicine, Hebei Agricultural University, NO.2596 Lekai South Street, Baoding, Hebei 071000, China; Veterinary Biological Technology Innovation Centre of Hebei Province, Baoding, Hebei 071000, China., Zhang W; College of Veterinary Medicine, Hebei Agricultural University, NO.2596 Lekai South Street, Baoding, Hebei 071000, China; Veterinary Biological Technology Innovation Centre of Hebei Province, Baoding, Hebei 071000, China., Zhao K; College of Veterinary Medicine, Hebei Agricultural University, NO.2596 Lekai South Street, Baoding, Hebei 071000, China; Veterinary Biological Technology Innovation Centre of Hebei Province, Baoding, Hebei 071000, China., Zhao Z; Beijing Centrebio Biological Co., Ltd, Beijing 102629, China. Electronic address: zhaozhuo2008@163.com., Yuan W; College of Veterinary Medicine, Hebei Agricultural University, NO.2596 Lekai South Street, Baoding, Hebei 071000, China; Veterinary Biological Technology Innovation Centre of Hebei Province, Baoding, Hebei 071000, China. Electronic address: yuanwanzhe@126.com.
Jazyk: angličtina
Zdroj: Veterinary microbiology [Vet Microbiol] 2024 Dec 04; Vol. 300, pp. 110332. Date of Electronic Publication: 2024 Dec 04.
DOI: 10.1016/j.vetmic.2024.110332
Abstrakt: The Novel Duck Reovirus (NDRV) infection poses a significant health risk to ducks, primarily attributed to the absence of efficacious preventive measures. This research aimed to investigate whether the administration of isolated Bacillus could protect antagonistic NDRV infection in a Cherry Valley duck model. Four indigenous Bacillus strains from the feces of healthy ducks demonstrated promising biosafety profiles. One-day-old ducklings were inoculated intramuscularly with NDRV and subsequently subjected to a 28-day regimen of mixed Bacillus (Bac) treatment. The effects of Bac on pathological symptoms, immune response and intestinal flora were analyzed. The results showed that Bac significantly reduced weight loss, clinical symptoms, and viral loading. Moreover, Bac treatment significantly decreased neutrophils, monocytes proportion, the TNF-α, IL-1β and IL-6 expression, increased platelets, lymphocytes proportion, the IFN-β and IL-10 expression, and restored immune dysfunction. In addition, Bac has increased the relative abundance of Enterococcaceae, Lactobacillales, Bacilli, Ruminococcaceae, Clostridium and Phascolarctobacterium. Moreover, the metabolism of short-chain fatty acids (SCFAs) was further regulated, thereby enhancing the acetate content. The correlation analysis showed that a positive association between acetate levels and IFN-β expression, while a negative correlation was observed with viral loading. In conclusion, the results suggest that the anti-NDRV mechanism of Bac may involve the modulation of gut microbiota to elicit an immune response that inhibits viral infection. This study presents a novel approach for the prevention and treatment of NDRV, thereby establishing a theoretical foundation for the future development of probiotics in the prevention and treatment of NDRV.
Competing Interests: Declaration of Competing Interest The authors declare no conflict of interest.
(Copyright © 2024. Published by Elsevier B.V.)
Databáze: MEDLINE
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