Down-Regulation of Basophil Function by Human CD200 and Human Herpesvirus-8 CD200

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Down-regulation of basophil function by human CD200 and human herpesvirus-8 CD200.

Human and rodent CD200 are recognized by the inhibitory CD200R, and these molecules play an important role in the regulation of the immune system. Several viruses, such as human herpesvirus-6 (HHV-6), HHV-7, and HHV-8, possess a CD200 homologue, suggesting that these viruses regulate the immune response via CD200R. In this study, we analyzed the effect of human CD200 and the viral CD200 homolog...

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Human herpesvirus 8 K14 protein mimics CD200 in down-regulating macrophage activation through CD200 receptor.

Many viral proteins limit host immune defenses, and their genes often originate from their hosts. CD200 (OX2) is a broadly distributed cell surface glycoprotein that interacts with a receptor on myeloid cells (CD200R) that is implicated in locally preventing macrophage activation. Distant, but recognizable, homologues of CD200 have been identified in many herpesviruses and poxviruses. Here, we ...

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Structures of CD200/CD200 Receptor Family and Implications for Topology, Regulation, and Evolution

CD200 is a widely distributed membrane glycoprotein that regulates myeloid cell activity through its interaction with an inhibitory receptor (CD200R). The interaction is of interest as a target for treating excessive inflammation and for treating leukemia. There are closely related proteins to CD200R that give activating signals making this a "paired receptor." We report X-ray crystallography s...

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Regulation of myeloid cell function through the CD200 receptor.

Myeloid cells play pivotal roles in chronic inflammatory diseases through their broad proinflammatory, destructive, and remodeling capacities. CD200 is widely expressed on a variety of cell types, while the recently identified CD200R is expressed on myeloid cells and T cells. CD200 deletion in vivo results in myeloid cell dysregulation and enhanced susceptibility to autoimmune inflammation, sug...

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CD200-expressing human basal cell carcinoma cells initiate tumor growth.

Smoothened antagonists directly target the genetic basis of human basal cell carcinoma (BCC), the most common of all cancers. These drugs inhibit BCC growth, but they are not curative. Although BCC cells are monomorphic, immunofluorescence microscopy reveals a complex hierarchical pattern of growth with inward differentiation along hair follicle lineages. Most BCC cells express the transcriptio...

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ژورنال

عنوان ژورنال: The Journal of Immunology

سال: 2005

ISSN: 0022-1767,1550-6606

DOI: 10.4049/jimmunol.175.7.4441