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4541 results sorted by

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

Biochemical and functional characterization of Rab27a mutations occurring in Griscelli syndrome patients

Rab27a is a member of the Rab family of small GTPase proteins, and thus far is the first member to be associated with a human disease (ie, the Griscelli syndrome type 2). Mutations in the Rab27a gene cause pigment as well as cytotoxic granule...
Authors: Menasche G, Feldmann J, Houdusse A, Desaymard C, Fischer, Goud B and de Saint Basile G

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

Memory and flexibility of cytokine gene expression as separable properties of human TH1 and TH2 lymphocytes

CD4+ T cell priming under T helper type I (T(H)1) or T(H)2 conditions gives rise to polarized cytokine gene expression. We found that in these conditions human naive T cells acquired stable histone hyperacetylation at either the Ifng or Il4 promoter....
Authors: Messi M, Giacchetto I, Nagata K, Lanzavecchia A, Natoli G and Sallusto F

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

Analysis of intracellular storage and regulated secretion of three von Willebrands disease-causing variants of von Willebrand factor

The rapid exocytosis of von Willebrand factor (VWF) in response to vascular injury can be attributed to the fact that VWF is stored in the Weibel-Palade bodies (WPBs) of endothelial cells. We describe a system for examining the ability of VWF to...
Authors: Michaux G, Hewlett LJ, Messenger SL, Goodeve AC, Peake IR, Daly ME and Cutler DF

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,...

HAX-1, identified by differential display reverse transcription polyerase chain reaction, is overexpressed in lesional psoriasis

Psoriasis is a chronic inflammatory disease characterized by epidermal hyperplasia and an inflammatory infiltrate. The normal differentiation from basal to granular keratinocytes with subsequent apoptosis and cornification is disturbed in the...
Authors: Mirmohammadsadegh A, Tartler U, Michel G, Baer A, Walz M, Wolf R, Ruzicka T and Hengge UR

JNK-dependent release of mitochondrial protein, SMAC during apoptosis in multiple myeloma (MM) cells

Smac, second mitochondria-derived activator of caspases, promotes apoptosis via activation of caspases. Previous studies have shown that c-Jun NH(2)-terminal kinase (JNK) is involved in regulating another mitochondrial protein, cytochrome c during...
Authors: Chauhan D, Li G, Hideshima T, Podar K, Mitsiades C, Midsiades N, Munshi N, Kharbanda S and Anderson...

Lymphotoxin and lipopolysaccharide induce NF-kappaB-p52 generation by a co-translational mechanism

The 'classical' NF-kappaB activation pathway proceeds via IkappaB kinase (IKK)-beta/gamma-mediated phosphorylation, induced ubiquitination and the degradation of small IkappaBs. An alternative, NF-kappaB-inducing kinase and IKK-alpha-dependent...
Authors: Mordmüller B, Krappmann D, Esen M, Wegener E and Scheidereit C
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