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4535 results sorted by

Forced expression of the Fc Receptor gamma-chain renders human T cells hyperresponsive to TCR/CD3 stimulation

High level expression of Fc epsilon RI gamma chain replaces the deficient TCR zeta-chain and contributes to altered TCR/CD3-mediated signaling abnormalities in T cells of patients with systemic lupus erythematosus. Increased responsiveness to Ag has...
Authors: Nambiar MP, Fisher CU, Kumar A, Tsokos CG, Warke VG and Tsokos GC

Characterization of a nuclear export signal within the human T cell leukemia virus type I transactivator protein Tax

Human T cell leukemia virus type I (HTLV-I) is the etiologic agent of adult T cell leukemia and HTLV-I-associated myelopathy/tropical spastic paraparesis. The HTLV-I transactivator protein Tax plays an integral role in the etiology of adult T cell...
Authors: Alefantis T, Barmak K, Harhaj E, Grant C and Wigdahl B

c-Myc degradation induced by DNA damage results in apoptosis of CHO cells

Although tripchlorolide (TC), a compound purified from a Chinese herb Tripterygium Wilfordii Hook, has been demonstrated to be a potent antitumor agent, its mechanisms of action are unknown. The present study shows that TC induces apoptosis of...
Authors: Jiang MR, Li YC, Yang Y and Wu JR

ERK 1/2 and JNKs-dependent synthesis of IL-6 and IL-8 by fibroblast-like synoviocytes stimulated with protein I/II, a modulin from oral streptococci, requires FAK

Protein I/II, a pathogen-associated molecular pattern from oral streptococci, is a potent inducer of interleukin-6 (IL-6) and IL-8 synthesis and release from fibroblast-like synoviocytes (FLSs), cells that are critically involved in joint...
Authors: Neff L, Zeisel M, Druet V, Takeda K, Klein JP, Sibilia J and Wachsmann D

Dynamic redistribution of raft domains as an organizing platform for signaling during cell chemotaxis

Spatially restricted activation of signaling molecules governs critical aspects of cell migration; the mechanism by which this is achieved nonetheless remains unknown. Using time-lapse confocal microscopy, we analyzed dynamic redistribution of lipid...
Authors: Gomez-Mouton C, Lacalle RA, Mira E, Jimenez-Baranda S, Barber DF, Carrera AC, Martinez-A. C and...

Epstein-Barr virus LMP1 blocks p16INK4a-RB pathway by promoting nuclear export of E2F4/5

The p16INK4a-RB pathway plays a critical role in preventing inappropriate cell proliferation and is often targeted by viral oncoproteins during immortalization. Latent membrane protein 1 (LMP1) of Epstein-Barr virus (EBV) is often present in...
Authors: Ohtani N, Brennan P, Gaubatz S, Sanij E, Hertzog P, Wolvetang E, Ghysdael J, Rowe M and Hara E

Effect of dicarbonyl modification of fibronectin on retinal capillary pericytes

PURPOSE: To determine effects of alpha-dicarbonyl modification of an extracellular matrix protein on retinal capillary pericyte attachment and viability. METHODS: Primary cultures of bovine retinal pericytes (BRPs) were seeded on either normal...
Authors: Liu B, Bhat M, Padival AK, Smith DG and Nagaraj RH

A serine protease inhibitor prevents endoplasmic reticulum stress-induced cleavage but not transport of the membrane-bound transcription factor ATF6

Mammalian cells express several transcription factors embedded in the endoplasmic reticulum (ER) as transmembrane proteins that are activated by proteolysis, and two types of these proteins have been extensively investigated. One type comprises the...
Authors: Okada T, Haze K, Nadanaka S, Yoshida H, Seidah NG, Hirano Y, Sato R, Negishi M and Mori K

Characterization and analysis of the proximal Janus Kinase 3 promoter

Janus kinase 3 (Jak3) is a nonreceptor tyrosine kinase essential for signaling via cytokine receptors that comprise the common gamma-chain (gammac), i.e., the receptors for IL-2, IL-4, IL-7, IL-9, IL-15, and IL-21. Jak3 is preferentially expressed in...
Authors: Aringer M, Hofmann S, Frucht DM, Chen M, Centola M, Morinobu A, Visconti R, Kastner DL, Smolen JS...

Caspase-3 has a nonapoptotic function in erythroid maturation

Caspase-3 plays a central role in apoptosis. It is also activated in normal erythropoiesis, with its activity peaking early during development (erythroid colony-forming unit [CFU-E] stage). In the present study, we have reduced the expression and...
Authors: Carlile GW, Smith DH, Wiedmann M.
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