Journal of Veterinary Clinics (한국임상수의학회지)

The Korean Society of Veterinary Clinics (한국임상수의학회)
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Effect of trans-10, cis-12 Conjugated Linoleic Acid on Production of Prostaglandin E2, Cyclooxygenase-2 and 5-lipoxygenase in Lipopolysaccharide-Stimulated Porcine Peripheral Blood Mononuclear Cells

  • Seo, Hae-Ryun (Department of Veterinary Medicine, Veterinary Medical Center and College of Veterinary Medicine, Chungbuk National University) ;
  • Ahn, Changhwan (Department of Veterinary Medicine, Veterinary Medical Center and College of Veterinary Medicine, Chungbuk National University) ;
  • Kang, Byeong-Teck (Department of Veterinary Medicine, Veterinary Medical Center and College of Veterinary Medicine, Chungbuk National University) ;
  • Kang, Ji-Houn (Department of Veterinary Medicine, Veterinary Medical Center and College of Veterinary Medicine, Chungbuk National University) ;
  • Jeung, Eui-Bae (Department of Veterinary Medicine, Veterinary Medical Center and College of Veterinary Medicine, Chungbuk National University) ;
  • Yang, Mhan-Pyo (Department of Veterinary Medicine, Veterinary Medical Center and College of Veterinary Medicine, Chungbuk National University)
  • Received : 2016.07.09
  • Accepted : 2016.08.16
  • Published : 2016.08.31
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Abstract

The objective of this study was to examine the effect of trans-10, cis-12 conjugated linoleic acid (t10c12-CLA) on the expression of cyclooxygenase-2 (COX-2) and 5-lipoxygenase (5-LOX) pathway in lipopolysaccharide (LPS)-stimulated porcine peripheral blood mononuclear cells (PBMCs). t10c12-CLA was treated with different concentrations in culture medium of LPS$na{\ddot{i}}ve$ and LPS-stimulated PBMCs. The mRNA expressions of prostaglandin $E_2$ ($PGE_2$)-synthase, COX-2 and 5-LOX were measured using quantitative real-time PCR. In addition, the production levels of $PGE_2$ and 5-LOX in culture supernatant from PBMCs with or without LPS were assessed by ELISA. In LPS$na{\ddot{i}}ve$ PBMCs, treatment of t10c12-CLA significantly (p < 0.05) increased the mRNA expressions of PGE2 synthase and 5-LOX compared to vehicle control. Expression of COX-2 mRNA did not show significant difference compared to vehicle control by t10c12-CLA treatment in LPS$na{\ddot{i}}ve$ PBMCs. However, the addition of LPS in PBMCs markedly (p < 0.05) increased the mRNA expression of COX-2, $PGE_2$ synthase and 5-LOX, and also significantly (p < 0.05) enhanced the production of $PGE_2$ and 5-LOX relative to LPS$na{\ddot{i}}ve$ PBMCs, respectively. However, the addition of t10c12-CLA significantly (p < 0.01) suppressed the LPS-induced excessive expression of COX-2, $PGE_2$ synthase, and 5-LOX compared to those of PBMCs treated with LPS alone. The production levels of $PGE_2$ and 5-LOX in culture supernatant from LPS-stimulated PBMCs were also significantly (p < 0.05) inhibited by the treatment of t10c12-CLA compared to LPS alone. These results suggested that t10c12-CLA has an anti-inflammatory effect via dual inhibition of COX-2 and 5-LOX with gene expression and production level in LPS-stimulated porcine PBMCs. Therefore, it was thought that t10c12-CLA can attenuate the inflammatory response by down-regulation of eicosanoids production.

Keywords

References

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