Molecules and Cells

  • 제23권1호
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  • Pages.57-63
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  • 2007
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  • 1016-8478(pISSN)
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  • 0219-1032(eISSN)
한국분자세포생물학회 (Korean Society for Molecular and Cellular Biology)
권호 표지

Leukotriene Synthesis in Response to A23187 Is Inhibited by Methyl-β-Cyclodextrin in RBL-2H3 Cells

  • You, Hye Jin (School of Life Sciences and Biotechnology, Korea University) ;
  • Seo, Ji-Min (School of Life Sciences and Biotechnology, Korea University) ;
  • Moon, Ji-Young (School of Life Sciences and Biotechnology, Korea University) ;
  • Han, Sung-Sik (School of Life Sciences and Biotechnology, Korea University) ;
  • Ko, Young-Gyu (School of Life Sciences and Biotechnology, Korea University) ;
  • Kim, Jae-Hong (School of Life Sciences and Biotechnology, Korea University)
  • 투고 : 2006.10.23
  • 심사 : 2006.12.27
  • 발행 : 2007.02.28
⟨ 이전 논문 다음 논문 ⟩

초록

Leukotrienes (LTs) are produced by several biosynthetic enzymes including cytosolic phospholipase $A_2$ ($cPLA_2$), 5-lipoxygenase (5-LO), and 5-lipoxygenase activating protein (FLAP) in the perinuclear area. In the present study, we showed that pretreatment with methyl-${\beta}$-cyclodextrin (MβCD), a cholesterol-depleting agent, dramatically reduced the synthesis of LTs in response to A23187 in mast cells. A23187-induced LT synthesis was inhibited by pretreatment with M${\beta}$CD, and this effect was reversed when cholesterol was added. In an approach to identifying the $M{\beta}CD$-sensitive protein(s), we observed that FLAP co-localized with flotillin-1, a lipid raft marker protein, in the lipid raft-rich low-density region of sucrose gradients. In addition, electron microscopic analysis revealed that FLAP co-localized with flotillin-1. Together, these results suggest that FLAP is present in cholesterol-rich lipid raft-like domains and that its localization in these domains is critical for LT synthesis.

키워드

과제정보

연구 과제 주관 기관 : Korea Science and Engineering Foundation (KOSEF), Ministry of Health & Welfare

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