• Title/Summary/Keyword: Biological science

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Erratum to: Identification of a New Agar-hydrolyzing Bacterium Vibrio sp. S4 from the Seawater of Jeju Island and the Biochemical Characterization of Thermostable Agarose (Erratum to: 제주도 연안 해양에서 분리한 한천분해 미생물 Vibrio sp. S4의 동정 및 내열성 agarase의 생화학적 특성)

Comparison of immunoadjuvant activities of four bursal peptides combined with H9N2 avian influenza virus vaccine

  • Zhang, Cong;Zhou, Jiangfei;Liu, Zhixin;Liu, Yongqing;Cai, Kairui;Shen, Tengfei;Liao, Chengshui;Wang, Chen
    • Journal of Veterinary Science
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    • v.19 no.6
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    • pp.817-826
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    • 2018

  • The bursa of Fabricius (BF) is a central humoral immune organ unique to birds. Four bursal peptides (BP-I, BP-II, BP-III, and BP-IV) have been isolated and identified from the BF. In this study, the immunoadjuvant activities of BPs I to IV were examined in mice immunized with H9N2 avian influenza virus (AIV) vaccine. The results suggested that BP-I effectively enhanced cell-mediated immune responses, increased the secretion of Th1 (interferon gamma)- and Th2 (interleukin-4)-type cytokines, and induced an improved cytotoxic T-lymphocyte (CTL) response to the H9N2 virus. BP-II mainly elevated specific antibody production, especially neutralizing antibodies, and increased Th1- and Th2-type cytokine secretion. BP-III had no significant effect on antibody production or cell-mediated immune responses compared to those in the control group. A strong immune response at both the humoral and cellular levels was induced by BP-IV. Furthermore, a virus challenge experiment followed by H&E staining revealed that BP-I and BP-II promoted removal of the virus and conferred protection in mouse lungs. BP-IV significantly reduced viral titers and histopathological changes and contributed to protection against H9N2 AIV challenge in mouse lungs. This study further elucidated the immunoadjuvant activities of BPs I to IV, providing a novel insight into immunoadjuvants for use in vaccine design.

  • https://doi.org/10.4142/jvs.2018.19.6.817 인용 KSCI