A G-protein-coupled receptor for leukotriene B4 that mediates chemotaxis

DOI PDF Web Site Web Site PubMed 研究データあり 被引用文献114件

書誌事項

公開日
1997-06
権利情報
  • http://www.springer.com/tdm
DOI
  • 10.1038/42506
公開者
Springer Science and Business Media LLC

この論文をさがす

説明

Leukotriene B4 (LTB4) is a potent chemoattractant that is primarily involved in inflammation, immune responses and host defence against infection. LTB4 activates inflammatory cells by binding to its cell-surface receptor (BLTR). LTB4 can also bind and activate the intranudear transcription factor PPAR alpha, resulting in the activation of genes that terminate inflammatory processes. Here we report the cloning of the complementary DNA encoding a cell-surface LTB4 receptor that is highly expressed in human leukocytes. Using a subtraction strategy, we isolated two cDNA clones (HL-1 and HL-5) from retinoic acid-differentiated HL-60 cells. These two clones contain identical open reading frames encoding a protein of 352 amino acids and predicted to contain seven membrane-spanning domains, but different 5'-untranslated regions. Membrane fractions of Cos-7 cells transfected with an expression construct containing the open reading frame of HL-5 showed specific LTB4 binding, with a K(d) (0.154nM) comparable to that observed in retinoic acid-differentiated HL-60 cells. In CHO cells stably expressing this receptor, LTB4 induced increases in intracellular calcium, D-myo-inositol-1,4,5-triphosphate (InsP3) accumulation, and inhibition of adenylyl cyclase. Furthermore, CHO cells expressing exogenous BLTR showed marked chemotactic responses towards low concentrations of LTB4 in a pertussis-toxin-sensitive manner. Our findings, together with previous reports, show that LTB4 is a unique lipid mediator that interacts with both cell-surface and nuclear receptors.

収録刊行物

  • Nature

    Nature 387 (6633), 620-624, 1997-06

    Springer Science and Business Media LLC

被引用文献 (114)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ