Hemopoietic cell expression of the chemokine decoy receptor D6 is dynamic and regulated by GATA1

McKimmie, C. S. et al. (2008) Hemopoietic cell expression of the chemokine decoy receptor D6 is dynamic and regulated by GATA1. Journal of Immunology, 181(5), pp. 3353-3363. (doi: 10.4049/jimmunol.181.11.8170-a) (PMID:19039854)

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Publisher's URL: http://www.jimmunol.org/content/181/5/3353


D6 scavenges inflammatory chemokines and is essential for the regulation of inflammatory and immune responses. Mechanisms explaining the cellular basis for D6 function have been based on D6 expression by lymphatic endothelial cells. In this study, we demonstrate that functional D6 is also expressed by murine and human hemopoietic cells and that this expression can be regulated by pro- and anti-inflammatory agents. D6 expression was highest in B cells and dendritic cells (DCs). In myeloid cells, LPS down-regulated expression, while TGF-β up-regulated expression. Activation of T cells with anti-CD3 and soluble CD28 up-regulated mRNA expression 20-fold, while maturation of human macrophage and megakaryocyte precursors also up-regulated D6 expression. Competition assays demonstrated that chemokine uptake was D6 dependent in human leukocytes, whereas mouse D6-null cells failed to uptake and clear inflammatory chemokines. Furthermore, we present evidence indicating that D6 expression is GATA1 dependent, thus explaining D6 expression in myeloid progenitor cells, mast cells, megakaryocytes, and DCs. We propose a model for D6 function in which leukocytes, within inflamed sites, activate D6 expression and thus trigger resolution of inflammatory responses. Our data on D6 expression by circulating DCs and B cells also suggest alternative roles for D6, perhaps in the coordination of innate and adaptive immune responses. These data therefore alter our models of in vivo D6 function and suggest possible discrete, and novel, roles for D6 on lymphatic endothelial cells and leukocytes.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Liew, Prof Foo and McInnes, Professor Iain and Connell, Dr Lesley and Fraser, Dr Alasdair and Halsey, Professor Chris and Nibbs, Professor Rob and Kurowska-Stolarska, Professor Mariola and Hansell, Dr Chris and McKimmie, Dr Clive and Graham, Professor Gerard
Authors: McKimmie, C. S., Fraser, A. R., Hansell, C., Gutierrez, L., Philipsen, S., Connell, L., Rot, A., Kurowska-Stolarska, M., Carreno, P., Pruenster, M., Chu, C.-C., Lombardi, G., Halsey, C., McInnes, I. B., Liew, F. Y., Nibbs, R. J., and Graham, G. J.
College/School:College of Medical Veterinary and Life Sciences > School of Infection & Immunity
Journal Name:Journal of Immunology
Publisher:American Association of Immunologists
ISSN (Online):1048-3233
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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
380241Toll-like receptors on T cellsFoo LiewMedical Research Council (MRC)G9818261Infection Immunity and Inflammation Medicine
486461The role of IL-35 in infection and inflammationFoo LiewMedical Research Council (MRC)G0801198III -IMMUNOLOGY