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alpha glucan/nowotwór złośliwy
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Antitumor activity of orally administered maitake α-glucan by stimulating antitumor immune response in murine tumor.
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Maitake α-glucan, YM-2A, isolated from Grifola frondosa, has been characterized as a highly α-1,6-branched α-1,4 glucan. YM-2A has been shown to possess an anti-virus effect in mice; however, it does not directly inhibit growth of the virus in vitro, indicating that the anti-virus effect of YM-2A
Maturation of dendritic cells by maitake α-glucan enhances anti-cancer effect of dendritic cell vaccination.
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Dendritic cells (DCs) play a primary role in antigen presentation to CD4+ and CD8+ T cells and induce acquired immune response against cancer cells. Therefore, determining positive modulators of DC activation to improve therapeutic approaches for cancer immunotherapy is greatly
Effects of alpha-glucans from Agaricus bisporus on ex vivo cytokine production by LPS and PHA-stimulated PBMCs; a placebo-controlled study in slightly hypercholesterolemic subjects.
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BACKGROUND
Mushrooms are known for their immune modulating effect for which the polysaccharide fraction, mainly glucans, seem to be responsible. Fungal beta-glucans have been studied extensively, whereas little is known about mushroom alpha-glucans. We have earlier shown that the polysaccharide
Anti-tumor activity of an enzymatically synthesized alpha-1,6 branched alpha-1,4-glucan, glycogen.
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Oral administration of an enzymatically synthesized alpha-1,4:1,6-glycogen (ESG) at a dose of 50 mug/ml significantly prolonged the survival time of Meth A tumor-bearing mice. ESG also significantly stimulated macrophage-like cells (J774.1), leading to augmented production of nitric oxide (NO) and
Purification and partial characterization of an acidic α-glucan-protein complex from the fruiting body of Pleurotus sajor-caju and its effect on macrophage activation.
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The aim of this study was to purify an acidic α-glucan-protein complex from the fruiting bodies of Pleurotus sajor-caju by using the cell wall-degrading enzymes, xylanase and cellulase. The acidic glucan-protein complex was separated from a polysaccharide extract by using DEAE Toyopearl 650M
Mycotherapy of cancer: an update on cytotoxic and antitumor activities of mushrooms, bioactive principles and molecular mechanisms of their action.
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Mycotherapy is defined as the study of the use of extracts and compounds obtained from mushrooms as medicines or health-promoting agents. The present review updates the recent findings on anticancer/antitumor agents derived from mushroom extracts and their metabolites. The increasing number of
Analysis of effector T cells against the murine syngeneic tumor MethA in mice orally administered antitumor polysaccharide SPR-901.
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The growth of MethA tumor was significantly inhibited by oral administration of the alpha-glucan SPR-901 in BALB/c (+/+) mice but not in nude mice. Mice treated orally with SPR-901 exhibited an augmentation of antigen-specific resistance against rechallenge with the tumor cells. The
Revisiting the structure of the anti-neoplastic glucans of Mycobacterium bovis Bacille Calmette-Guerin. Structural analysis of the extracellular and boiling water extract-derived glucans of the vaccine substrains.
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The attenuated strain of Mycobacterium bovis Bacille Calmette-Guérin (BCG), used worldwide to prevent tuberculosis and leprosy, is also clinically used as an immunotherapeutic agent against superficial bladder cancer. An anti-tumor polysaccharide has been isolated from the boiling water extract of
Effect of beta- and alpha-glucans on immune modulating factors expression in enterocyte-like Caco-2 and goblet-like LS 174T cells.
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Glucans are complex polysaccharides consisting of repeated units of d-glucose linked by glycosidic bonds. The nutritional contribution in α-glucans is mainly given by starch and glycogen while in β-glucans by mushrooms, yeasts and whole grains, such as barley and spelt well represented in the
Cooperative role of T lymphocytes and macrophages in anti-tumor activity of mice pretreated with schizophyllan (SPG).
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Anti-tumor activity was studied in mice injected with Schizophyllan (SPG), a glucan produced by Schizophyllum commune Fries. SPG-injected mice rejected subcutaneously inoculated sarcoma-180 and the anti-tumor activity was shown to be mediated by host spleen and lymph node cells. The anti-tumor
Immunomodulation and anti-cancer activity of polysaccharide-protein complexes.
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In the last three decades, numerous polysaccharides and polysaccharide-protein complexes have been isolated from mushrooms and used as a source of therapeutic agents. The most promising biopharmacological activities of these biopolymers are their immunomodulation and anti-cancer effects. They are
Molecular mass and antitumor activities of sulfated derivatives of alpha-glucan from Poria cocos mycelia.
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Two kinds of water-insoluble (1-->3)-alpha-D-glucan samples, ab-PCM3-I and ac-PCM3-I, isolated from different Poria cocos mycelia were sulfated, to produce two series of water-soluble derivatives ab-PCM3-I-S1-S5 and ac-PCM3-I-S1-S5, respectively. The derivatives having different weight-average
Preparation of a glucan from the roots of Rubus crataegifolius Bge. and its immunological activity.
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A water-soluble glucan (RCP-1) was prepared from the roots of Rubus crataegifolius Bge. by extraction with hot-water, deproteination by Sevag reagent, alpha-amylase treatment and ultrafiltration. RCP-1 consisted of only glucose, and its molecular weight was determined to be approximately 7KD by high
Effect of a soluble alpha-D-glucan from the lichenized fungus Ramalina celastri on macrophage activity.
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An alpha-glucan from the lichen Ramalina celastri has previously been demonstrated to have cytotoxic effects against HeLa cells. This polysaccharide was studied using Sarcoma-180 cells as tumoral model, and its effects on peritoneal exudate cells, namely, hydrogen peroxide production, phagocytic
A Phase I study of the safety of the nutritional supplement, active hexose correlated compound, AHCC, in healthy volunteers.
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Active Hexose Correlated Compound (AHCC) is an extract of Lentinula edodes of the basidiomycete family of fungi rich in alpha glucans. AHCC has been used for many years as a dietary supplement to enhance the immune system and in clinical trials as an adjunctive treatment in Hepatocellular cancer.
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