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Página 1 desde 366 resultados
Recombinant human tumour necrosis factor increases cytosolic free calcium in murine fibroblasts and stimulates inositol phosphate formation in L-M and arachidonic acid release in 3T3 cells.
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Stimulation of murine L-M and 3T3 fibroblasts with human recombinant tumour necrosis factor (rTNF) resulted in an increase in the cytosolic free Ca2+ concentration ([Ca2+]i). In 3T3 cells rTNF also induced release and metabolization of arachidonic acid, whereas in L-M cells rTNF provoked rapid
Tumor necrosis factor alpha decreases inositol phosphate formation and phosphatidylinositol-bisphosphate (PIP2) synthesis in rat cardiomyocytes.
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Treatment of neonatal rat cardiomyocytes for 72 h in the presence of tumor necrosis factor alpha (TNF alpha) (10 U/ml) lead to a decrease in basal and alpha 1-adrenoceptor-induced formation of the calcium-mobilizing second messenger inositol trisphosphate (IP3) and its metabolites, IP2 and IP1, by
Antibodies against phosphatidylinositol and inositol monophosphate specifically inhibit tumour necrosis factor induction by malaria exoantigens.
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The active component of the exoantigens of malarial parasites which stimulates macrophages to secrete tumour necrosis factor (TNF) has been shown to depend upon a phospholipid, the activity of which was blocked by phosphatidylinositol (PI) and inositol monophosphate (IMP) in competitive inhibition
Opposing effects of tumour necrosis factor alpha and hyperosmolarity on Na+/myo-inositol co-transporter mRNA levels and myo-inositol accumulation by 3T3-L1 adipocytes.
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Tumour necrosis factor alpha (TNF-alpha) regulates the transport of myo-inositol in 3T3-L1 adipocytes. Treating 3T3-L1 adipocytes with TNF-alpha decreases Na+/myo-inositol co-transporter (SMIT) mRNA levels and myo-inositol accumulation in a concentration-and time-dependent manner. TNF-alpha
Tumor necrosis factor-alpha-mediated regulation of the inositol 1,4,5-trisphosphate receptor promoter.
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Tumor necrosis factor-alpha (TNF-alpha), a proinflammatory cytokine, has been implicated as a central mediator in multiple homeostatic and pathologic processes. Signaling cascades downstream of its cellular cognate receptors, as well as the resultant transcriptional responses have received intense
[Tumor necrosis factor-alpha enhances type I inositol 1, 4, 5-triphosphate receptor expression in rat glomerular afferent arterioles smooth muscle cells].
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OBJECTIVE
To study the effect of tumor necrosis factor-alpha (TNF-alpha) on type I inositol 1, 4, 5-triphosphate receptor (IP(3) R) expression in rat glomerular afferent arterioles smooth muscle cells (RASMC).
METHODS
Isolation and culture of RASMC and detection of type I IP(3) R protein and type I
Inositol lipid metabolism in vasopressin stimulated hepatocytes from rats infused with tumor necrosis factor.
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We studied the effect of i.v. infusion of human recombinant tumor necrosis factor alpha (rHuTNF alpha, Cetus, 15 micrograms/100 g bw over 3 h) on vasopressin (VP)-stimulated 32P-inositol lipid turnover and the release of 3H-inositol phosphates in isolated rat hepatocytes. The early VP-induced
Increased levels of inositol hexakisphosphate (InsP6) protect HEK293 cells from tumor necrosis factor (alpha)- and Fas-induced apoptosis.
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The overexpression of inositol 1,3,4-trisphosphate 5/6-kinase has recently been shown to protect HEK293 cells from tumor necrosis factor alpha (TNF(alpha))-induced apoptosis. This overexpression leads to an increase in the levels of both inositol 1,3,4,5,6-pentakisphosphate (InsP5) and inositol
Inositol 1,3,4-trisphosphate 5/6-kinase inhibits tumor necrosis factor-induced apoptosis.
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Tumor necrosis factor receptor 1 (TNF-R1) signaling elicits a wide range of biological responses, including inflammation, proliferation, differentiation, and apoptosis. TNF-R1 activates both caspase-mediated apoptosis and NF-kappaB transcription of anti-apoptotic factors. We now report a link
Tumor necrosis factor-alpha potentiates intraneuronal Ca2+ signaling via regulation of the inositol 1,4,5-trisphosphate receptor.
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Inflammatory events have long been implicated in initiating and/or propagating the pathophysiology associated with a number of neurological diseases. In addition, defects in Ca2+-handling processes, which shape membrane potential, influence gene transcription, and affect neuronal spiking patterns,
Enhancement of tumor necrosis factor cytotoxicity by lithium chloride is associated with increased inositol phosphate accumulation.
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We have previously reported that LiCl increases considerably the cytotoxic activity of TNF towards some transformed cell lines such as L929. Here we show that treatment of these cell lines with the combination of TNF and LiCl leads to the prolonged accumulation of inositol monophosphate, inositol
B-cell activating factor-receptor specific activation of tumor necrosis factor receptor associated factor 6 and the phosphatidyl inositol 3-kinase pathway in lymphoma B cells.
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B-cell activating factor-receptor (BAFF-R) is the primary BAFF receptor that is responsible for promoting B-cell development and survival. Malignant B-cells exploit the BAFF/BAFF-R system, and high serum BAFF levels or genetic alterations in BAFF receptors have been found in B-cell cancers. BAFF
Priming of human neutrophil superoxide generation by tumour necrosis factor-alpha is signalled by enhanced phosphatidylinositol 3,4,5-trisphosphate but not inositol 1,4,5-trisphosphate accumulation.
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In human neutrophils, significant agonist-stimulated superoxide anion (O2-) release is observed only after exposure to a priming agent such as TNFalpha. We have investigated the potential for TNFalpha to modulate N-formyl-Met-Leu-Phe (fMLP)-triggered Ins(1,4,5)P3 and PtdIns(3,4,5)P3 accumulation.
The phosphatidyl-myo-inositol anchor of the lipoarabinomannans from Mycobacterium bovis bacillus Calmette Guérin. Heterogeneity, structure, and role in the regulation of cytokine secretion.
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Lipoarabinomannans are major mycobacterial antigens capable of modulating the host immune response; however, the molecular basis underlying the diversity of their immunological properties remain an open question. In this study a new extraction and purification approach was successfully applied to
Involvement of X-box binding protein 1 and reactive oxygen species pathways in the pathogenesis of tumour necrosis factor receptor-associated periodic syndrome.
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OBJECTIVE
To investigate convergence of endoplasmic reticulum stress pathways and enhanced reactive oxygen species (ROS) production, due to intracellular retention of mutant tumour necrosis factor receptor 1 (TNFR1), as a disease mechanism in TNFR-associated periodic syndrome
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