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Effects of Fucoidan on Nitric Oxide Production and Activator Protein-1 Activation in Lipopolysaccharide-Stimulated Porcine Peripheral Blood Mononuclear Cells

LPS로 자극한 돼지 말초혈액 단핵구세포의 Nitric Oxide (NO) 생산 및 Activator Protein-1 (AP-1) 활성화에 있어 Fucoidan의 효과

  • Park, Jongchan (Department of Veterinary Medicine, College of Veterinary Medicine, Chungbuk National University) ;
  • Ahn, Changhwan (Department of Veterinary Medicine, College of Veterinary Medicine, Chungbuk National University) ;
  • Kang, Byeong-Teck (Department of Veterinary Medicine, College of Veterinary Medicine, Chungbuk National University) ;
  • Kang, Ji-Houn (Department of Veterinary Medicine, College of Veterinary Medicine, Chungbuk National University) ;
  • Jeung, Eui-Bae (Department of Veterinary Medicine, College of Veterinary Medicine, Chungbuk National University) ;
  • Yang, Mhan-Pyo (Department of Veterinary Medicine, College of Veterinary Medicine, Chungbuk National University)
  • Accepted : 2015.08.05
  • Published : 2015.08.31

Abstract

Fucoidan which is sulfated polysaccharide extracted from brown seaweed has a wide variety of internal biological activities. The objectives of this study were to examine the effect of fucoidan on nitric oxide (NO) production in lipopolysaccharide (LPS)-stimulated porcine peripheral blood mononuclear cells (PBMCs) and to investigate whether this effect is involved in the expression of inducible nitric oxide synthase (iNOS) and the activation of activator portein-1 (AP-1). The levels of NO production and AP-1 activity in the culture supernatants from porcine PBMCs were measured by the enzyme-linked immunosorbent assay and the levels of iNOS and AP-1 mRNA were determined by real time polymerase chain reaction. Fucoidan in LPS-naïve PBMCs has no effects on the production of NO and activity of AP-1. Expressions of iNOS and AP-1 mRNA in LPS-naïve PBMCs were also not affected by treatment of fucoidan. However, NO production, AP-1 activity and expressions of iNOS and AP-1 mRNA were dramatically increased in PBMCs stimulated with LPS. Enhancing effects of NO production and AP-1 activity in PBMCs induced by LPS were reduced by addition of fucoidan. Fucoidan also inhibited an increase in expressions of iNOS and AP-1 mRNA in LPS-stimulated PBMCs. These results suggested that fucoidan exerts anti-inflammatory effect by down-regulating production of NO via suppressing expression of iNOS and activity of AP-1 in LPS-stimulated porcine PBMCs.

Fucoidan은 갈조류로부터 추출되는 황산다당류로 다양한 생리학적 활성을 갖고 있다. 본 연구의 목적은 LPS로 자극한 돼지 말초혈액 단핵구세포(PBMCs)의 NO 생산에 있어 fucoidan의 효과를 검토하고, 이러한 효과가 iNOS의 발현과 AP-1의 활성화와 관련이 있는지를 조사하는데 있다. LPS 무처치 돼지 PBMCs에서 fucoidand의 처리는 NO 생산과 AP-1활성에 대해 효과를 보이지 않았다. 또한 iNOS와 AP-1의 mRNA 발현도 fucoidan 처치에 의해 영향을 받지 않았다. 그러나 LPS로 자극한 PBMCs에서는 NO 생산과 AP-1의 활성 그리고 iNOS와 AP-1의 mRNA 발현이 현저하게 증가하였다. 이와 같은 LPS에 의한 돼지 PBMCs의 NO 생산과 AP-1 활성증가는 fucoidan 첨가에 의해 감소되었다. 또한 fucoidan은 LPS에 의한 iNOS와 AP-1의 mRNA 발현증가도 억제시켰다. 이상의 결과는 fucoidan이 LPS 자극 돼지 PBMCs에서 iNOS 발현과 AP-1 활성의 억제와 함께 NO 생산을 하향 조절함으로써 항염증효과를 나타내는 것으로 사료되었다.

Keywords

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