Genetic selection for resistance to mycoplasmal pneumonia of swine (MPS) in the Landrace line influences the expression of soluble factors in blood after MPS vaccine sensitization

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

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

We recently developed a Landrace line that is resistant to mycoplasmal pneumonia of swine (MPS) infection by genetic selection for five generations, and we reported that the immunophenotype of this line is different from that of the non-selected line in terms of changes in peripheral blood leukocyte population after MPS vaccination. This study followed up previous findings demonstrating changes in soluble factors in blood, namely, hormones, Mycoplasma hyopneumoniae-specific immunoglobulin G (IgG), and cytokines. These two lines were injected with MPS vaccine on days -7 and 0 after blood sampling on those days, and blood samples were collected on days -14, -7, 0, 2, 7 and 14. We found changes in the levels of many hormones and cytokines in both lines. However, we found that only growth hormone (GH) and interferon (IFN)-γ levels were statistically different between these two lines. GH concentration was reduced (day 0) and IFN-γ concentration was increased (day 14) in the MPS-selected line compared with the non-selected line, despite unchanged IFN-γ messenger RNA expression in blood cells. Although detailed mechanisms underlying these phenotypes remain unsolved, these traits would be useful to improve MPS resistance in pig production and provide an insight into MPS infection.

Original languageEnglish
Pages (from-to)365-373
Number of pages9
JournalAnimal Science Journal
Volume85
Issue number4
DOIs
Publication statusPublished - 2014 Apr

Keywords

  • Disease resistance
  • Immunity
  • Landrace pigs
  • Mycoplasmal pneumonia

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)

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