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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Leukocyte immunoglobulin-like receptors: novel innate receptors for human basophil activation and inhibition.

Basophils, recruited from the blood to tissues, have been implicated by their presence in diverse allergic disorders including bronchial asthma, allergic rhinitis, and cutaneous contact hypersensitivity. We hypothesized that like other leukocytes involved in inflammatory responses, basophils would express members of the leukocyte immunoglobulin-like receptor (LIR) family of immuno-regulatory molecules on their cell surface. We identified LIR7, an activating member coupled to the common Fc receptor gamma chain, and LIR3, an inhibitory member containing cytoplasmic immunoreceptor tyrosine-based inhibitory motifs, on these cells from human peripheral blood. Cross-linking of LIR7 resulted in the concentration-dependent net release of histamine (29.8 +/- 10.8%) and cysteinyl leukotrienes (cysLTs) (31.4 +/- 8.7 ng/10(6) basophils) that were maximal at 30 minutes, and of interleukin-4 (IL-4) (410.2 +/- 61.6 pg/10(6) basophils) that was maximal at 4 hours and comparable with the response initiated by cross-linking of the high-affinity receptor for immunoglobulin E (FcepsilonRI). Coligation of LIR3 to LIR7 or to FcepsilonRI by means of a second monoclonal antibody significantly inhibited net histamine release, cysLT production, and IL-4 generation. That LIR3 is profoundly counter-regulatory for both adaptive and innate receptors suggests a broad role in containment of the inflammatory response.[1]

References

  1. Leukocyte immunoglobulin-like receptors: novel innate receptors for human basophil activation and inhibition. Sloane, D.E., Tedla, N., Awoniyi, M., Macglashan, D.W., Borges, L., Austen, K.F., Arm, J.P. Blood (2004) [Pubmed]
 
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