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Chemokine stimulation of human periphereal blood T lymphocytes induces rapid dephosphorylation of ERMs which facilitates loss of microvilli and polarization

Lymphocyte microvilli mediate initial rolling-adhesion along endothelium but are lost during transmigration from circulation to tissue. However, the mechanism for resorption of lymphocyte microvilli remains unexplored. We show that chemokine...

Authors: Brown MJ, Nijhara R, Hallam JA, Gignac M, Yamada KM, Erlandsen SL, Delon J, Kruhlak M and Shaw S

Histamine enhances TGF-beta1-mediated suppression of TH2 responses

Susceptibility of T cells to TGF-beta1 produced by regulatory T cells has an important impact on the induction and maintenance of peripheral tolerance and therefore on the development of autoimmunity, cancer, and allergy. Histamine not only mediates...

Authors: Kunzmann S, Mantel PY, Wohlfahrt JG, Akdis CA, Blaser K and Schmidt-Weber CB

High-resolution multicolor imaging of dynamic signaling complexes in T cells stimulated by planar substrates

The dynamic visualization of developing immunological synapses has been hindered by the difficulty of imaging the contact between the T cell and the antigen-presenting cell (APC). Here, we describe a technique in which T cell responses are...

Authors: Bunnell SC, Barr VA, Fuller CL and Samelson LE

SARA and Hgs attenuate susceptibility to TGF-beta1-mediated T cell supression

Transforming growth factor-beta1 (TGF-beta1) is a pluripotent cytokine that controls peripheral T cell tolerance mainly in mucosal immunity. It is secreted by regulatory T cells (Tr /Th3) but also by other immununologically active cells. Smad anchor...

Authors: Kunzmann S, Wohlfahrt JG, Itoh S, Asao H, Komada M, Akdis CA, Blaser K and Schmidt-Weber CB

T cell receptor ligation induces the formation of dynamically regulated signaling assemblies.

Tcell antigen receptor (TCR) ligation initiates tyrosine kinase activation, signaling complex assembly, and immune synapse formation. Here, we studied the kinetics and mechanics of signaling complex formation in live Jurkat leukemic T cells using...

Authors: Bunnell SC, Hong DI, Kardon JR, Yamazaki T, McGlade CJ, Barr VA and Samelson LE

IL-10-inducible Bcl-3 negatively regulates LPS-induced TNF-alpha production in macrophages

Interleukin-10 (IL-10) plays an important role in prevention of chronic inflammation in vivo. However, the molecular mechanism by which IL-10 exerts its anti-inflammatory response is poorly understood. Here, we performed a microarray analysis and...

Authors: Kuwata H, Watanabe Y, Miyoshi H, Yamamoto M, Kaisho T, Takeda K and Akira S

Identification of an angiogenic factor that when mutated causes susceptibility to Klippel-Trenaunay syndrome

Angiogenic factors are critical to the initiation of angiogenesis and maintenance of the vascular network. Here we use human genetics as an approach to identify an angiogenic factor, VG5Q, and further define two genetic defects of VG5Q in patients...

Authors: Tian XL, Kadaba R, You SA, Liu M, Timur AA, Yang L, Chen Q, Szafranski P, Rao S, Wu L, Housman DE,...

Determinants of Notch-3 receptor expression and signaling in vascular smooth muscle cells. Implications in cell-cycle regulation

The Notch family of receptors and ligands plays an important role in cell fate determination, vasculogenesis, and organogenesis. Mutations of the Notch-3 receptor result in an arteriopathy that predisposes to early-onset stroke. However, the...

Authors: Campos AH, Wang W, Pollmann MJ and Gibbons GH

Nucleoporation of dendritic cells: efficient gene transfer by electroporation into human monocyte-derived dendritic cells

Dendritic cells (DCs) are ideal accessory cells in the developing field of gene therapy. Although viral transfection of DCs has become widespread, non-viral transfection of DCs has shown disappointing results. Recently, a new technique for...

Authors: Lenz P, Bacot SM, Frazier-Jessen MR and Feldman GM

HSP27 inhibits release of mitochondrial protein Smac in multiple myeloma cells and confers dexamethasone resistance

Smac, second mitochondria-derived activator of caspases, promotes apoptosis via activation of caspases. Heat shock protein 27 (Hsp27) negatively regulates another mitochondrial protein, cytochrome c, during apoptosis; however, the role of Hsp27 in...

Authors: Chauhan D, Li G, Hideshima T, Podar K, Mitsiades C, Midsiades N, Catley L, Tai YT, Hayashi T,...

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