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Stranica 1 iz 18 rezultatima
Lentinan augments skin reaction induced by bradykinin: its correlation with vascular dilatation and hemorrhage responses and antitumor activities.
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The effects of lentinan, an antitumor polysaccharide, on vascular reactions against vasoactive mediators were investigated in murine systems. Lentinan augmented intradermal reactions against bradykinin. Induction of acute phase proteins (APP) and the vascular dilatation hemorrhage (VDH) reaction on
Genetic control of the expression of two biological activities of an antitumor polysaccharide, lentinan.
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In order to make clear whether the expression of biological activities and antitumor polysaccharides are under genetic control, the responses of mice to lentinan, a beta-1,6;1,3-glucan, in the induction of several acute phase proteins (APPs) and T-cell-mediated vascular dilation and hemorrhage (VDH)
Polygenic control of the expression of biological activities of an antitumor polysaccharide, lentinan.
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Genetic studies were carried out on two in vivo responses of lentinan, delayed type-acute phase responses (DT-APR) and vascular dilation and hemorrhage (VDH). Linkage analyses showed that DT-APR was controlled by two recessive genes, ltnr1 and ltnr2, which were mapped on chromosome 3 and 11,
[Subacute toxicity study of lentinan in rats. 5-week intravenous treatment (author's transl)].
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Male and female JCL : SD rats were treated intravenously with lentinan in 5% mannitol solution at dose levels of 0, 0.03, 3.0 and 30.0 mg/kg/day for 5 weeks. Rats receiving 0.3, 3.0 and 30.0 mg/kg/day showed reddening in ear, tail and scrotum and edema in legs and scrotum after day 3 of treatment.
[Intravenous chronic toxicity of lentinan in rats: 6-month treatment and 3-month recovery (author's transl)].
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Chronic toxicity of lentinan was studied in male and female JCL : SD rats. Lentinan was given intravenously into tail vein. Dosage levels employed were 0 (5% mannitol), 0.01, 0.1, 1 (with or without dextran), and 10 mg/kg/day for 6 months in a volume of 1 ml/100 g body weight. After 6 months, the
Macrophage-mediated acute-phase transport protein production induced by lentinan.
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A new bioactive factor capable of stimulating the production of acute-phase transport proteins, haptoglobin, hemopexin and ceruloplasmin, was found in mouse serum soon after the administration of lentinan, an immunomodulatory polysaccharide. This factor (APPIF) was produced by macrophages, and may
Antitumor and immunological activity of lentinan in comparison with LPS.
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Lentinan manifests marked antitumor and antimetastatic activity in numerous tumor/host systems, and prevents chemical and viral carcinogenesis. Modulation of immune or vascular functions by lentinan is involved in its antitumor effects. The impact of lentinan on the functions of macrophages is
[Antitumor effect of bacterial lipopolysaccharide (LPS) and a combination use of LPS and lentinan on C3H/He mice bearing MH-134 tumor].
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Using C3H/He mice a series of experiments was carried to study the antitumor effect of lipopolysaccharide (LPS) in combined use with Lentinan extracted from Cortinellus shiitake and its influence on cellular immunity as well as antitumor effect of tumor necrosis factor (TNF) prepared from LPS, and
T-cell mediated vascular dilatation and hemorrhage induced by antitumour polysaccharides.
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Antitumour polysaccharide lentinan, capable of potentiating T-cell dependent reactions and some other antitumour polysaccharides such as pachymaran, carboxymethyl-pachymaran and zymosan were found to induce vascular dilatation and hemorrhage(VDH) in CD-1 normal mice starting the following day after
Four dominant loci for the vascular responses by the antitumor polysaccharide, lentinan.
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Lentinan, beta-1,6;1,3-glucan, showing an antitumor effect against mouse solid type tumors, can induce marked vascular dilation and hemorrhage (VDH) in very localized areas such as the ears, feet, and tails of mice in the early stages after its administration (Maeda et al. 1984). VDH has been found
Effects of lentinan on colorectal carcinogenesis in mice with ulcerative colitis.
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Lentinan; i.e., polysaccharides extracted from a kind of black mushroom shiitake, has been clinically applied as an antitumor and antimetastatic drug, and has been reported to prevent both chemical and viral carcinogenesis. It is known that lentinan affects the tumorous vascular system resulting in
[Acute toxicity of lentinan in mice and rats (author's transl)].
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A new anti-tumor polysaccharide, lentinan (beta-1, 3 Glucan) was studied on the acute toxicities using both sexes of mice (ICR) and rats (CD) treated by intravenously (i.v.) intraperitoneally (i.p.), subcutaneously (s.c.) and orally (p.o). LD50 values in mg/kg body weight were essentially the same
Denaturation and renaturation of a beta-1,6;1,3-glucan, lentinan, associated with expression of T-cell-mediated responses.
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Correlation between the higher structure and biological functions of lentinan, a beta-1,6;1,3-glucan capable of potentiating T- and non-T-cell-mediated responses, were investigated by measurements of optical rotation and some biological responses. The addition of urea or dimethyl sulfoxide decreased
Antitumor effect of bacterial lipopolysaccharide (LPS) alone and in combination with lentinan on MH-134 tumors in C3H/He mice.
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Using C3H/He mice, the antitumor effect of lipopolysaccharide (LPS) alone and in combination with Lentinan extracted from Lentinus edodes was studied. The influence of LPS on cellular immunity and the antitumor effect of the tumor necrosis factor (TNF) were also examined. LPS, which was administered
[Definition of tumor-necrosis factor and its production mechanism].
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There is significant evidence that the macrophage plays a critical role in the host's defense against neoplasia. Tumor-necrosis factor was recognized by Carswell et al. during a study of the antitumor activity of serum from mice infected with BCG and subsequently injected with endotoxin. The same
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