Soluble CD100 functions on human monocytes and immature dendritic cells require plexin C1 and plexin B1, respectively

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Soluble CD100 functions on human monocytes and immature dendritic cells require plexin C1 and plexin B1, respectively.

CD100 represents the first semaphorin described in the immune system. It is expressed as a 300-kDa homodimer at the surface of most hematopoietic cells, but is also found in a soluble form following a proteolytic cleavage upon cell activation. We herein established that soluble CD100 (sCD100) impaired the migration of human monocytes and immature dendritic cells (DCs), but not of mature DCs. Pe...

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CD100/Plexin-B1 interactions sustain proliferation and survival of normal and leukemic CD5+ B lymphocytes.

Growth and survival of chronic B-cell tumors are favored by the malignant cell's capacity to respond to selected microenvironmental stimuli provided by nontumoral bystander cells. To investigate which mechanisms operate in these crosstalks and whether they are malignancy-related or reproduce the mechanisms used by normal B cells we have studied the expression and functional role of semaphorin C...

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Dendritic cell function in mice lacking Plexin C1.

Semaphorins are secreted or transmembrane proteins that provide essential repulsive guidance cues to growing axons or endothelial cells through their receptors of the Plexin and Neuropilin family. Semaphorins and Plexins are also expressed in the immune system where their function remains elusive. In particular, Plexin C1 is expressed by mouse dendritic cells (DCs) and is the receptor for the p...

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Plexin-B2 and Plexin-D1 in Dendritic Cells: Expression and IL-12/IL-23p40 Production

Plexins are a family of genes (A,B,C, and D) that are expressed in many organ systems. Plexins expressed in the immune system have been implicated in cell movement and cell-cell interaction during the course of an immune response. In this study, the expression pattern of Plexin-B2 and Plexin-D1 in dendritic cells (DCs), which are central in immune activation, was investigated. Plexin-B2 and Ple...

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Analysis of the interaction of Plexin-B1 and Plexin-B2 with Rnd family proteins

The Rnd family of proteins, Rnd1, Rnd2 and Rnd3, are atypical Rho family GTPases, which bind to but do not hydrolyse GTP. They interact with plexins, which are receptors for semaphorins, and are hypothesised to regulate plexin signalling. We recently showed that each Rnd protein has a distinct profile of interaction with three plexins, Plexin-B1, Plexin-B2 and Plexin-B3, in mammalian cells, alt...

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ژورنال

عنوان ژورنال: International Immunology

سال: 2005

ISSN: 0953-8178,1460-2377

DOI: 10.1093/intimm/dxh224