Journal
POULTRY SCIENCE
Volume 100, Issue 12, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.psj.2021.101498
Keywords
melanocyte; avian; mucosal immunity; infectious bursa disease virus
Categories
Funding
- Chinese University Scientific Fund [2018QC205]
- National Natural Science Foundation of China [31872316]
- Animal Husbandry Science and Technology and Improved Breeding Promotion Capacity Construction Project of Jinan Innovation Zone [20201028]
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Melanocytes in black-boned chickens are widely distributed in their inner organs and play important innate immune roles during virus infection. Genes related to the TLR signaling pathway were highly detected during infectious bursal disease virus infection, indicating the involvement of melanocytes in the immune response against the virus.
In black-boned chicken, melanocytes are widely distributed in their inner organs. However, the roles of these cells are not fully elucidated. In this study, we used 3-wk-old female Silky Fowl to investigate the functions of melanocytes under infection with infectious bursal disease virus (IBDV). We found the melanocytes in the bursa of Fabricius involved in IBDV infection shown as abundant melanin were transported into the nodule and lamina propria where obvious apoptotic cells and higher expression of BAX were detected. Genes related to the toll-like receptor (TLR) signaling pathway were highly detected by quantitative PCR, including TLR1, TLR3, TLR4, TLR15, myeloid differential protein-88, interferon-alpha, and interferon-beta. We then isolated and infected primary melanocytes with IBDV in vitro and found that higher expressions of immune genes were detected at 24 and 48 h after infection; the upregulated innate and adaptive immune genes were involved in the pathogenesis of IBDV infection, including TLR3, TLR7, interleukin 15 (IL15), IL18, IL1rap, CD7, BG2, ERAP1, and SLA2. These changes in gene expression were highly associated with microtubule-based movement, antigen processing and presentation, defense against viruses, and innate immune responses. Our results indicated that the widely distributed melanocytes in Silky Fowl could migrate to play important innate immune roles during virus infection.
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