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arabinogalactan/nekrose
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Induction of interleukin-1beta, tumour necrosis factor-alpha and apoptosis in mouse organs by amphotericin B is neutralized by conjugation with arabinogalactan.
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OBJECTIVE
To investigate the possibilities that: (i) organ toxicity of amphotericin B-deoxycholate (AMB-DOC) is related to induction of interleukin-1beta (IL-1beta), tumour necrosis factor-alpha (TNF-alpha) and apoptosis in target organs; and (ii) the reduced toxicity resulting from the conjugation
Immunomodulating activity of arabinogalactan and fucoidan in vitro.
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Many polysaccharides obtained from natural sources are considered to be biological response modifiers and have been shown to enhance various immune responses. Here, we investigated the immunomodulating effects of arabinogalactan (AG) and fucoidan (FU) in vitro. Mouse spleen lymphocytes became
Natural killer cell-mediated cytotoxicity is increased by a type II arabinogalactan from Anoectochilus formosanus.
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This study investigated the effects of a type II arabinogalactan from Anoectochilus formosanus (AGAF) on natural killer (NK) cell-mediated cytotoxicity and the possible underlying mechanisms. This study reported that sustained exposure to AGAF increased NK-92MI cell-mediated cytotoxicity in a time-
Mechanism of stimulation of human natural killer cytotoxicity by arabinogalactan from Larix occidentalis.
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Cultures of human peripheral blood mononuclear cells (PBMC) as well as cultures of preseparated peripheral non-adherent cells (PNAC) and monocytes showed enhancement of natural killer (NK) cytotoxicity against K562 tumor cells when pretreated with arabinogalactan from Larix occidentalis for 48-72 h.
Structural elucidation and bioactivities of a novel arabinogalactan from Coreopsis tinctoria.
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Coreopsis tinctoria is being widely cultivated in Xinjiang of China, whose consumption is known to prevent diabetes and neurodegenerative diseases. To elucidate the bioactive ingredients responsible for these benefits, the alkaline soluble crude polysaccharide (CTB) was isolated from C. tinctoria.
Arabinogalactan proteins contribute to the immunostimulatory properties of New Zealand honeys.
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BACKGROUND
Factors in honey that improve wound healing are poorly understood, but are thought to include lipopolysaccharide (LPS), apalbumin-1 and -2, and a 5.8 kDa component that stimulate cytokine release from macrophages.
OBJECTIVE
To characterize the ability of New Zealand honeys to elicit the
Macrophage activation by the polysaccharide arabinogalactan isolated from plant cell cultures of Echinacea purpurea.
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In this study, acidic arabinogalactan, a highly purified polysaccharide from plant cell cultures of Echinacea purpurea, with a molecular weight of 75,000, was effective in activating macrophages to cytotoxicity against tumor cells and micro-organisms (Leishmania enriettii). Furthermore, this
Arabinogalactans from Mimosa tenuiflora (Willd.) Poiret bark as active principles for wound-healing properties: specific enhancement of dermal fibroblast activity and minor influence on HaCaT keratinocytes.
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BACKGROUND
Aqueous extracts from the bark of Mimosa tenuiflora (Willd.) Poirett (Mimosaceae), tradionally known as "tepescohuite", are widely used for wound-healing and burns in middle and South America. No pharmacological data are available on the influence of aqueous extracts and high molecular
Identification of the mycobacterial subcomponents involved in the release of tumor necrosis factor-related apoptosis-inducing ligand from human neutrophils.
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Intravesical administration of Mycobacterium bovis bacillus Calmette-Guérin (BCG) continues to be a successful immunotherapy for superficial bladder cancer. Recently, workers in our laboratory observed expression of tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) on neutrophils in
The effect of amphotericin b derivatives on Leishmania and immune functions.
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The effects of a water-soluble amphotericin B (AmB)-arabinogalactan (AG) conjugate on several immune functions were investigated. The experiments measured the effects of AmB-AG on (1) release of tumor necrosis factor-alpha (TNF-alpha), nitric oxide (NO), and interferon-gamma (IFN-gamma) from
A Polysaccharide Isolated from Codonopsis pilosula with Immunomodulation Effects Both In Vitro and In Vivo.
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In this study, an acidic polysaccharide from Codonopsis pilosula Nannf. var. modesta (Nannf.) L. T. Shen (WCP-I) and its main fragment, WCP-Ia, obtained after pectinase digestion, were structurally elucidated and found to consist of a rhamnogalacturonan I (RG-I) region containing both
Structural and immunological feature of rhamnogalacturonan I-rich polysaccharide from Korean persimmon vinegar.
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The crude polysaccharide (KPV-0) isolated from Korean persimmon vinegar was fractionated using gel filtration chromatography to enhance the immunostimulatory activity and to identify the structural features of active fraction. Among three fractions, KPV-I obtained in a void volume, demonstrated the
Induction of hepatic Ito cell nitric oxide production after acute endotoxemia.
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Nitric oxide is a highly reactive mediator released in the liver by hepatocytes, Kupffer cells and endothelial cells during endotoxin-induced inflammation. In this study we determined whether Ito cells also produce nitric oxide after exposure to endotoxin. For induction of endotoxemia, rats were
Immunomodulatory and hemagglutinating activities of acidic polysaccharides isolated from Combretum racemosum.
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Extracts of leaves of different species of the genus Combretum have been used historically to treat a variety of medicinal problems. However, little is known about the active components conferring therapeutic properties to these extracts. In the present studies, we evaluated biochemical properties
Immunomodulatory activity of polysaccharides isolated from Alchornea cordifolia.
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BACKGROUND
Extracts of leaves from different species of the genus Alchornea have been used for centuries to treat a variety of medicinal problems in tropical Africa. However, little is known about the high-molecular weight active components conferring therapeutic properties to these
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