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Side 1 fra 868 resultater
Causal relationship between a tumour growth and the changes in histamine metabolism in tissues of sarcoma-bearing rat.
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The relationship between malignancy and histamine metabolism in the liver and the small intestine has been examined in sarcoma-bearing Wistar rats two weeks after subcutaneous implantation of a transplantable methylcholanthrene sarcoma Sa1828 and on the 3, 7 and 14th days after tumour extirpation.
Altered response to histamine in brain tumor vessels: the selective increase of regional cerebral blood flow in transplanted rat brain tumor.
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The authors studied the effect of intracarotid administration of histamine on the regional cerebral blood flow (rCBF) in transplanted rat C6 glioma by the hydrogen clearance method. Histamine infusion at doses of 1 and 10 micrograms/kg/min produced an increase of rCBF in the tumor (24.6% +/- 16.4%,
Decreases in histamine forming enzyme activity of non-metastasizing fibrosarcomas in hamsters with progressive tumor growth.
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A marked and progressive decrease in the activity of the histamine forming enzyme, histidine decarboxylase (HDC), of tumors was found to be associated with the progressive growth of SV-40 virus induced and transplanted syngeneic non-metastasizing fibrosarcomas in inbred LSH Syrian hamsters.
The inhibition of histamine uptake and metabolism by burimamide in the guinea-pig atrium and in mouse neoplastic mast cells, in vitro.
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Burimamide, an H(2)-receptor blocking agent, has been shown capable of blocking the uptake and metabolism of [(14)C]-histamine, both in the guinea-pig isolated atrium and in murine neoplastic mast cells. This occurs even at concentrations far below the dose range capable of blocking the positive
Stimulation of in vivo tumor growth and phorbol ester-induced inflammation by N,N-diethyl-2-[4-(phenylmethyl)phenoxy] ethanamine HCl, a potent ligand for intracellular histamine receptors.
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We have implicated histamine as a mediator of proliferation through its binding to novel intracellular receptors (HIC), closely associated with antiestrogen binding sites (AEBS) in microsomes and nuclei. N,N-diethyl-2-[4-(phenylmethyl)phenoxy]ethanamine HCl (DPPE), is a potent ligand for AEBS/HIC.
Interferon and antiallergic drug regulation of histamine and tumor necrosis factor-alpha in rat mast cell subsets.
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We have further characterized the heterogeneity of mast cells (MCs) by comparing the ability of rat peritoneal MCs (PMCs) and intestinal mucosal MCs (IMMCs) to produce tumor necrosis factor (TNF)-alpha and by investigating its regulation by interferon (IFN) and the antiallergic drugs nedocromil
Histamine receptor antagonists, cyclooxygenase blockade, and tumor necrosis factor during acute septic insult.
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Tumor necrosis factor (TNF) may be a major endogenous mediator of sepsis-induced acute organ injury. We proposed that treatment of septic pigs with the combined agents ibuprofen, a cyclooxygenase inhibitor, and histamine receptor antagonists, cimetidine (H2 antagonist) and diphenhydramine (H1
Interaction of histamine H1-and H2-receptor antagonists with histamine uptake and metabolism by guinea-pig isolated atrium and mouse neoplastic mast cells cells in vitro.
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1. Burimamide, metiamide, chlorpheniramine, triprolidine and cocaine, were tested as inhibitors of histamine uptake and metabolism in the guinea-pig atrium and in mouse neoplastic mast cells. 2. Cocaine did not affect the uptake and metabolism of histamine, either in the atrium or in the mast cells.
Dendrogenin A arises from cholesterol and histamine metabolism and shows cell differentiation and anti-tumour properties.
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We previously synthesized dendrogenin A and hypothesized that it could be a natural metabolite occurring in mammals. Here we explore this hypothesis and report the discovery of dendrogenin A in mammalian tissues and normal cells as an enzymatic product of the conjugation of 5,6α-epoxy-cholesterol
Histamine antagonizes tumor necrosis factor (TNF) signaling by stimulating TNF receptor shedding from the cell surface and Golgi storage pool.
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Tumor necrosis factor (TNF) activates pro-inflammatory functions of vascular endothelial cells (EC) through binding to receptor type 1 (TNFR1) molecules expressed on the cell surface. The majority of TNFR1 molecules are localized to the Golgi apparatus. Soluble forms of TNFR1 (as well as of TNFR2)
Distinct characteristics of signal transduction events by histamine-releasing factor/translationally controlled tumor protein (HRF/TCTP)-induced priming and activation of human basophils.
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We previously identified a negative correlation between histamine release to histamine releasing factor/translationally controlled tumor protein (HRF/TCTP) and protein levels of the Src homology 2 domain-containing inositol 5' phosphatase (SHIP) in basophils. We have also demonstrated that HRF/TCTP
Lipid-bound sialic acid, prostaglandin E and histamine in head and neck cancer.
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Blood concentration of lipid-bound sialic acid (LBSA), prostaglandin E (PGE) and histamine were determined in 37 patients with carcinoma of hypopharynx and larynx (supraglottic and glottic), in 12 non-cancer patients and in 10 healthy subjects. The concentration of LBSA was significantly increased
Histamine-2-receptor antagonists and gastric cancer: update and note on latency and covariates.
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The relationship between treatment with histamine-2 (H2)-receptor antagonists (cimetidine and ranitidine) and subsequent risk of gastric cancer was analyzed with data of a case-control study conducted in northern Italy between 1983 and 1991 on 628 incident cases of gastric cancer and 1776 control
Effects of ibrutinib on proliferation and histamine release in canine neoplastic mast cells.
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The Bruton's tyrosine kinase (BTK) inhibitor ibrutinib is effective in the treatment of human chronic lymphocytic leukaemia and mantle cell lymphoma. Recent data have shown that ibrutinib also blocks IgE-dependent activation and histamine release in human basophils (BAs) and mast cells (MCs). The
Influence of histamine and serotonin antagonists on the growth of xenografted human colorectal tumors.
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Four lines of human colorectal cancer were established and serially propagated as subcutaneous xenographs in immunosuppressed inbred CBA/Lac mice. Established xenografts were then used to investigate the influence of a serotonin antagonist (BW 501c) and a histamine H2 receptor antagonists
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