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Pagina 1 a partire dal 303 risultati
Critical role of the carboxyl terminus of proline-rich tyrosine kinase (Pyk2) in the activation of human neutrophils by tumor necrosis factor: separation of signals for the respiratory burst and degranulation.
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Transduction of Tat-tagged fusion proteins confirmed a hypothesis based on pharmacologic inhibitors (Fuortes, M., M. Melchior, H. Han, G.J. Lyon, and C. Nathan. 1999. J. Clin. Invest. 104:327-335) that proline-rich tyrosine kinase (Pyk2) plays a critical role in the activation of adherent human
Stimulatory effect of ovine colostrinine (a proline-rich polypeptide) on interferons and tumor necrosis factor production by murine resident peritoneal cells.
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We describe effects of ovine colostrinine (proline-rich polypeptide--PRP) isolated from ovine colostrum and nonapeptide fragment of PRP on interferon (IFN) and tumor necrosis factor (TNF) production by murine resident peritoneal cells (RPC). The cells from several mouse strains have been found to
Tumor necrosis factor-alpha mediates pancreatitis responses in acinar cells via protein kinase C and proline-rich tyrosine kinase 2.
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OBJECTIVE
Although tumor necrosis factor alpha is implicated as an important mediator of the inflammatory response in acute pancreatitis, its role in other pathologic features of the disease remains unknown. We investigated the role for tumor necrosis factor alpha in cytoskeletal responses and the
Antagonistic regulation of a proline-rich transcription factor by transforming growth factor beta and tumor necrosis factor alpha.
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Transforming growth factor beta (TGF-beta) and tumor necrosis factor alpha (TNF-alpha) often exhibit antagonistic actions on the regulation of various activities such as immune responses, cell growth, and gene expression. However, the molecular mechanisms involved in the mutually opposing effects of
Early inflammatory reactions in atherosclerosis are induced by proline-rich tyrosine kinase/reactive oxygen species-mediated release of tumor necrosis factor-alpha and subsequent activation of the p21Cip1/Ets-1/p300 system.
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OBJECTIVE
Reactive oxygen species (ROS) are involved in the initial process of atherosclerosis, whereas it remains to be determined how atherogenic stimulus causes ROS-mediated proinflammatory reactions. Here, we focused on proline-rich tyrosine kinase (PYK2)-mediated ROS generation and examined how
RNA sequencing and pathway analysis identify tumor necrosis factor alpha driven small proline-rich protein dysregulation in chronic rhinosinusitis.
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BACKGROUND
Chronic rhinosinusitis (CRS) is a heterogeneous inflammatory disorder in which many pathways contribute to end-organ disease. Small proline-rich proteins (SPRR) are polypeptides that have recently been shown to contribute to epithelial biomechanical properties relevant in T-helper type 2
Effect of proline rich polypeptide from ovine colostrum on virus replication in human placenta and amniotic membrane at term; possible role of endogenous tumour necrosis factor alpha.
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Freshly prepared organ cultures of human placentae and amniotic membranes at term show different sensitivity to vesicular stomatitis virus (VSV) infection. In six of 16 amniotic membranes and seven of 17 placentae VSV replicated to relatively high titres (10(3)-10(6)TCID(50)/ml). The others were
Monocytic U937 adhesion, tumor necrosis factor-alpha and interleukin-1 beta expression in response to gelatin-based networks grafted with arginine-glycine-aspartic acid and proline-histidine-serine-arginine-asparagine oligopeptides.
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In this study we synthesized gelatin-based, tissue-engineering, interpenetrating network (IPN) scaffolds immobilized with fibronectin (FN)-derived peptides to assess monocyte-biomaterial interaction. Human promonocytic U937 cells were seeded onto peptide-grafted IPN or tissue-culture polystyrene
Genetic deletion of glycogen synthase kinase-3beta abrogates activation of IkappaBalpha kinase, JNK, Akt, and p44/p42 MAPK but potentiates apoptosis induced by tumor necrosis factor.
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Glycogen synthase kinase (GSK)-3beta is a constitutively active, proline-directed serine/threonine kinase that controls growth modulation and tumorigenesis through multiple intracellular signaling pathways. How GSK-3beta regulates signaling pathways induced by cytokines such as tumor necrosis factor
Comparative effects of tumour necrosis factor-alpha (cachectin), interleukin-1-beta and tumour growth on amino acid metabolism in the rat in vivo. Absorption and tissue uptake of alpha-amino[1-14C]isobutyrate.
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The effects of acute administration of either tumour necrosis factor-alpha (cachectin) (TNF) or interleukin-1-beta (IL-1), or of tumour growth (Walker-256 carcinosarcoma), on blood amino acid concentrations and tissue alpha-amino[1-14C]isobutyrate (AIB) uptake in virgin and lactating rats were
Tumor necrosis factors alpha and beta can stimulate bone resorption in cultured mouse calvariae by a prostaglandin-independent mechanism.
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Human recombinant tumor necrosis factors alpha and beta (TNF-alpha and TNF-beta), at and above 1 ng/ml (approximately equal to 70 pM), caused a dose- and time-dependent enhancement of 45Ca release from neonatal mouse calvarial bones in vitro. In addition, TNF-alpha and TNF-beta (3-100 ng/ml) caused
The tetrapeptide acetyl-serine-aspartyl-lysine-proline improves skin flap survival and accelerates wound healing.
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The tetrapeptide acetyl-serine-aspartyl-lysine-proline (AcSDKP) has recently been recognized as a potent angiogenic factor. Given the importance of vascular blood supply in the process of tissue repair we have investigated the ability of AcSDKP to contribute to the repair of cutaneous injuries by
Diverse effects of mycobacterial proline-proline-glutamic acid proteins upon interaction with host macrophages.
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The proline-proline-glutamic acid (PPE) family proteins are abundant only in pathogenic Mycobacteria, but their general functions are far from unveiled. To investigate their roles in how Mycobacterium tuberculosis (Mtb) resists killing by the host, 25 PPE recombinant Mycobacterium smegmatis strains
Nuclear factor-kappaB is a critical mediator of Ste20-like proline-/alanine-rich kinase regulation in intestinal inflammation.
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Inflammatory bowel disease (IBD) is thought to result from commensal flora, aberrant cellular stress, and genetic factors. Here we show that the expression of colonic Ste20-like proline-/alanine-rich kinase (SPAK) that lacks a PAPA box and an F-alpha helix loop is increased in patients with IBD. The
Proline/arginine-rich end leucine-rich repeat protein converts stem cells to ligament tissue and Zn(II) influences its nuclear expression.
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Our objective was to facilitate ligament tissue reconstruction by characterizing the mechanism of expression of ligament tissue. To accomplish this, we searched for proteins specific to the tissue and introduced them into mesenchymal stem cells. In the two-dimensional phosphorescent gel
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