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Página 1 a partir de 606 resultados
Differentiation of human monocytes to monocyte-derived macrophages is associated with increased lipoprotein lipase-induced tumor necrosis factor-alpha expression and production: a process involving cell surface proteoglycans and protein kinase C.
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The aim of the present study was to (1) evaluate the responsiveness of human mononuclear cells to lipoprotein lipase (LPL), as assessed by tumor necrosis factor-alpha (TNFalpha) production, during the process of differentiation of monocytes to macrophages, and (2) determine the mechanisms by which
Role of insulin resistance in decreasing lipoprotein lipase activity in tumor-bearing rats.
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The role of insulin resistance in the tumor-induced decrease in tissue lipoprotein lipase (LPL) activity was studied in vivo and vitro in methylcholanthrene-induced sarcoma-bearing rats. Intraperitoneal (i.p.) injection of 2U of regular insulin resulted in high-adipose LPL activity in control rats
Stimulation of decreased lipoprotein lipase activity in the tumor-bearing state by the antihyperlipidemic drug bezafibrate.
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The activity of lipoprotein lipase (LPL), a key regulatory enzyme for triglyceride (TG) clearance from plasma, is reported to decrease as the tumor burden increases in tumor-bearing animals and patients with lung cancer; therefore, it is believed to play a key role in inducing cancer cachexia. We
Hepatic triacylglycerol lipase in circulating blood of normal and tumor-bearing mice and its hydrolysis of very-low-density lipoprotein and synthetic acylglycerols.
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A large amount of triacylglycerol lipase activity was present in the circulating blood of normal mice, and this activity decreased with development of Sarcoma 180 inoculated intraperitoneally. Triacylglycerol lipase in plasma of both normal and tumor-bearing mice was retained on the
Effect of tumor necrosis factor administration in vivo on lipoprotein lipase activity in various tissues of the rat.
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When added to murine adipocytes in culture, tumor necrosis factor (TNF) decreases the levels of lipoprotein lipase (LPL). Semb et al (1987. J. Biol Chem. 262: 8390-8394) have shown that administration of murine TNF to rats decreases lipoprotein lipase (LPL) in the epididymal fat pad with maximal
The influence of monoacylglycerol lipase inhibition upon the expression of epidermal growth factor receptor in human PC-3 prostate cancer cells.
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BACKGROUND
It has been reported that direct activation of the cannabinoid CB1 receptor in epidermal growth factor (EGR)-stimulated PC-3 prostate cancer cells results in an anti-proliferative effect accompanied by a down-regulation of EGF receptors (EGFR). In the present study, we investigated
Differential effects of lipoprotein lipase on tumor necrosis factor-alpha and interferon-gamma-mediated gene expression in human endothelial cells.
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Lipoprotein lipase (LPL) is a key enzyme in the hydrolysis of triglyceride-rich lipoproteins. In vascular diseases, such as atherosclerosis, inflammation plays an important role in the pathogenesis of the disease. We examined the role of LPL in modulating tumor necrosis factor-alpha (TNF-alpha)- and
Suppression of carcass weight loss in cachexia in rats bearing Leydig cell tumor by the novel compound NO-1886, a lipoprotein lipase activator.
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The Leydig cell tumor has been reported to produce tumor necrosis factor (TNF) and induce cachexia in rats. TNF is thought to reduce lipoprotein lipase (LPL) activity, decrease fat deposits, induce emaciation, and worsen cachexia. Therefore, we thought emaciation might be prevented and thus cachexia
Is bile salt-dependent lipase concentration in serum of any help in pancreatic cancer diagnosis?
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The diagnostic value of bile salt-dependent lipase for pancreatic diseases was tested in sera of 187 patients. Of these patients, 76 suffered from pancreatic carcinoma, 43 from nonmalignant liver diseases (cirrhosis and chronic hepatitis), 18 from acute pancreatitis, and 20 from chronic
Hyperlipasemia in 6 dogs with pancreatic or hepatic neoplasia: evidence for tumor lipase production.
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Amarked increase in serum pancreatic lipase (PL) activity with minimal concurrent increase in serum alpha-amylase activity was observed in 6 dogs with pancreatic or hepatic neoplasia. Serum PL activity ranged from 5410 U/L to 42,900 U/L, 11 to 93 times the upper reference limit for our laboratory.
Copy number variants and VNTR length polymorphisms of the carboxyl-ester lipase (CEL) gene as risk factors in pancreatic cancer.
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OBJECTIVE
We have recently described copy number variants (CNVs) of the human carboxyl-ester lipase (CEL) gene, including a recombined deletion allele (CEL-HYB) that is a genetic risk factor for chronic pancreatitis. Associations with pancreatic disease have also been reported for the variable
Recombinant human cachectin/tumor necrosis factor but not interleukin-1 alpha downregulates lipoprotein lipase gene expression at the transcriptional level in mouse 3T3-L1 adipocytes.
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Lipoprotein lipase (LPL) is synthesized primarily in muscle and adipose tissue and by hydrolyzing triglycerides in chylomicrons and very low density lipoprotein allows uptake of the resultant free fatty acids by these tissues. This report describes the cloning of the mouse LPL gene from which probes
Effect of intralipid infusion on serum high- and low-density lipoprotein cholesterol, lecithin:cholesterol acyltransferase, and lipoprotein lipase in tumor-bearing rats.
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We compared the effects of 0.45% normal saline (NS), 5% Intralipid (IL), and 16.7% glucose (Glu) infusions on total serum triglycerides and cholesterol, serum high-(HDL-c) and low-density lipoprotein cholesterol (LDL-c), and activity of serum lecithin:cholesterol acyltransferase (LCAT), and serum
Monoglyceride lipase mediates tumor-suppressive effects by promoting degradation of X-linked inhibitor of apoptosis protein.
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We have previously reported that Monoglyceride Lipase (MGL) expression is absent or reduced in various human malignancies and MGL-deficient mice develop tumors in multiple organs. Evidence also suggests MGL to be a tumor suppressor, however, the mechanisms underlying its tumor-suppressive actions
Small cell lung cancer with paraneoplastic lipase production.
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Kulchitsky cells represent the cells of origin of small cell lung cancer (SCLC). They display an antigenic makeup characteristic of both the neural crest and epithelium and have been shown to secrete both polypeptide hormones and enzymes. The coexistence of two or more (concomitant or sequential)
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