Immunogenic properties of Landrace pigs selected for resistance to mycoplasma pneumonia of swine

Liushiqi Borjigin, Tomoyuki Shimazu, Yuki Katayama, Meihua Li, Takumi Satoh, Kouichi Watanabe, Haruki Kitazawa, Sang Gun Roh, Hisashi Aso, Kazuo Katoh, Takafumi Uchida, Yoshihito Suda, Akiko Sakuma, Mituru Nakajo, Keiichi Suzuki

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Mycoplasma pneumonia of swine (MPS) lung lesions and immunogenic properties were compared between a Landrace line that was genetically selected for reduced incidence of pulmonary MPS lesions, and a non-selected Landrace line. The MPS-selected Landrace line showed significantly lower degrees of pulmonary MPS lesions compared with the non-selected Landrace line. When changes in immunity before and after vaccination were compared, the percentage of B cells in the peripheral blood of the MPS-selected Landrace line was significantly lower than that of the non-selected line. Furthermore, the concentration of growth hormone and the mitogen activity of peripheral blood mononuclear cells in the MPS-selected Landrace line showed significantly (P<0.05) lower increases after vaccination than the non-selected line. Conversely, the concentration of peripheral blood interferon (IFN)-γ and salivary immunoglobulin A (IgA) after Mycoplasma hyopneumoniae vaccination was significantly higher in the MPS-selected Landrace line than in the non-selected line. Gene expression of toll-like receptor (TLR)2 and TLR4 was significantly higher in the MPS-selected Landrace line in immune tissues, with the exception of the hilar lymph nodes. The present results suggest that peripheral blood IFN-γ, salivary IgA TLR2, and TLR4 are important immunological factors influencing the development of MPS lesions.

Original languageEnglish
Pages (from-to)321-329
Number of pages9
JournalAnimal Science Journal
Volume87
Issue number3
DOIs
Publication statusPublished - 2016 Mar 1

Keywords

  • Disease resistance
  • Immunogenic properties
  • Mycoplasma pneumonia lesions
  • Pig

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)

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