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12 resultados
Determination of UDP-N-acetylglucosamine: beta-D-mannoside-1,4-N-acetylglucosaminyltransferase-III in patients sera with chronic hepatitis and liver cirrhosis using a monoclonal antibody.
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The glycoprotein UDP-N-acetylglucosamine: beta-D-mannoside-1,4-N-acetylglucosaminyltransferase-III (GnT-III) catalyzes the addition of N-acetylglucosamine via a beta-1, 4-linkage to the beta-linked mannose of the trimannosyl core of N-linked glycans. It has been reported that the expression of
Transfection of N-acetylglucosaminyltransferase III gene suppresses expression of hepatitis B virus in a human hepatoma cell line, HB611.
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beta-D-mannoside beta-1,4-N-acetylglucosaminyltransferase III (GnT-III) catalyzes the addition of N-acetylglucosamine in beta 1-4 linkage to the beta-linked mannose of the trimannosyl core of N-linked oligosaccharides and forms a bisecting GlcNAc structure. Although the biological meaning of the
Selective suppression of N-acetylglucosaminyltransferase III activity in a human hepatoblastoma cell line transfected with hepatitis B virus.
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UDP-N-acetylglucosamine: beta-D-mannoside beta-1,4-N-acetylglucosaminyl-transferase III (GnT-III) is a key enzyme in the branching of asparagine-linked oligosaccharides, which are present in surface membrane proteins of various tissues and in secretory glycoproteins. The activity of GnT-III was
Elevated expression of bisecting N-acetylglucosaminyltransferase-III gene in a human fetal hepatocyte cell line by hepatitis B virus.
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OBJECTIVE
UDP-N-acetylglucosamine: alpha-D-mannoside beta-1,4 N-acetylglucosaminyltransferase III (GnT-III) is a key enzyme in N-glycan biosynthesis. Human GnT-III enzyme activity was found to be elevated in the serum of patients with hepatomas and liver cirrhosis and in hepatocellular carcinoma
Inhibition of hepatitis C virus by the cyanobacterial protein Microcystis viridis lectin: mechanistic differences between the high-mannose specific lectins MVL, CV-N, and GNA.
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Plant or microbial lectins are known to exhibit potent antiviral activities against viruses with glycosylated surface proteins, yet the mechanism(s) by which these carbohydrate-binding proteins exert their antiviral activities is not fully understood. Hepatitis C virus (HCV) is known to possess
The hepatitis B virus X protein inhibits secretion of apolipoprotein B by enhancing the expression of N-acetylglucosaminyltransferase III.
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The X protein of hepatitis B virus (HBx) plays a major role on hepatocellular carcinoma (HCC). Apolipoprotein B (apoB) in the liver is an important glycoprotein for transportation of very low density lipoproteins and low density lipoproteins. Although lipid accumulation in the liver is known as one
Alteration in suppressor cell activity in chronic active hepatitis.
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We have studied peripheral blood mononuclear cells obtained from 24 patients with acute or chronic active hepatitis to determine if there was an abnormality in concanavalin A-induced suppressor cell activity compared to control subjects. Suppressor cells were generated by preincubation of the
A synthetic analogue of phosphatidylinositol mannoside is an efficient adjuvant.
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We recently described the synthesis of an ether linked analogue of phosphatidylinositol dimannoside (PIM(2)ME). In the current study, PIM(2)ME was found to significantly enhance the release of the key Th1 cytokine interleukin-12 (IL-12) by dendritic cells (DCs) of naive mice in vitro, but not
Enzyme-antibody conjugation by a heterobifunctional reagent and its application in enzyme-linked immunosorbent assay (ELISA) for the detection of hepatitis B surface antigen.
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The heterobifunctional reagent 3-(2-pyridyl-dithio)propionate (SPDP) was used to prepare defined conjugates composed of horseradish peroxidase (HRP) and goat anti-HBs IgG. The modification of HRP and IgG with SPDP was dependent on both the SPDP: protein molar ratio and the pH of the buffer.
Concanavalin A induces perforin-mediated but not Fas-mediated hepatic injury.
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Concanavalin A (Con A) induces T-cell-mediated hepatic injury in vivo, although Con A-stimulated lymphocytes are not cytotoxic to normal hepatocytes in vitro. This contradiction makes the mechanism of Con A-induced hepatitis elusive. In this study, we demonstrate that Con A but not tumor necrosis
Elevated expression of UDP-N-acetylglucosamine: alphamannoside beta1,6 N-acetylglucosaminyltransferase is an early event in hepatocarcinogenesis.
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Previous reports have suggested that changes in oligosaccharide structures, especially beta1-6 branching in N-glycans, which are biosynthesized by UDP-N-acetylglucosamine:alpha mannoside beta1,6 N-acetylglucosaminyltransferase (GnT-V), are linked to tumor metastasis and invasion. In the present
Liver membrane proteome glycosylation changes in mice bearing an extra-hepatic tumor.
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Cancer is well known to be associated with alterations in membrane protein glycosylation (Bird, N. C., Mangnall, D., and Majeed, A. W. (2006) Biology of colorectal liver metastases: A review. J. Surg. Oncol. 94, 68-80; Dimitroff, C. J., Pera, P., Dall'Olio, F., Matta, K. L., Chandrasekaran, E. V.,
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