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4902 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

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

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

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,...

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...

Pericyte-specific expression of RGs5: implications for PDGF and EDG receptor signaling during vascular maturation

RGS proteins finely tune heterotrimeric G-protein signaling. Implying the need for such fine-tuning in the developing vascular system, in situ hybridization revealed a striking and extensive expression pattern of Rgs5 in the arterial walls of...
Authors: Cho H, Kozasa T, Bondjers C, Betsholtz C and Kehrl JH

Pleiotropic defects in lymphocyte activation caused by caspase-8 mutations lead to human immunodeficiency

Apoptosis is a form of programmed cell death that is controlled by aspartate-specific cysteine proteases called caspases. In the immune system, apoptosis counters the proliferation of lymphocytes to achieve a homeostatic balance, which allows potent...
Authors: Chun HJ, Zheng L, Ahmad M, Wang J, Speirs CK, Siegel RM, Dale JK, Puck J, Davis J, Hall CG,...
SST Peer Reviewed

RNA-transfected CD40-activated B cells induce functional T-cell responses against viral and tumor antigen targets: implications for pediatric immunotherapy

Vaccination with antigen-presenting cells (APCs) engineered to mimic mechanisms of immune stimulation represents a promising approach for cancer immunotherapy. Dendritic cell vaccines have entered phase 3 testing in adult malignancies, but such...
Authors: Coughlin CM, Vance BA, Grupp SA and Vonderheide RH
SST Peer Reviewed

Marlin-1 a novel RNA binding protein associates with GABA(subB) receptors

GABA(subB) receptors are heterodimeric G protein-coupled receptors that mediate slow synaptic inhibition in the CNS. While heterodimerization between GABA(subB) receptor GABA(subB)R1 and GABA(subB)R2 subunits is essential for functional expression,...
Authors: Couve A, Restituito S, Brandon JM, Charles KJ, Bawagan H, Freeman KB, Pangalos MN, Calver AR and...

CD154 transcriptional regulation in primary human CD4 T cells

CD154 (CD40-ligand) has a wide variety of pleiotropic effects throughout the immune system and is critical to both cellular and humoral immunity. Cell surface and soluble CD154 are primarily expressed by activated CD4 T cells. Expression of CD154 is...
Authors: Cron RQ
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