Stranica 1 iz 19 rezultatima
Mice sarcoma S180 cell membranes, [r-32 P]ATP and plant polysaccharides (PPS, ASPS, TF and lentinan) were incubated together for 5 min at 30 degrees C. Phosphatidylinositides were isolated and subjected to scintillation fluid counting. The results showed that PPS and ASPS, especially the latter,
The effect of lentinan on retardation and regression of transplanted tumors was analysed in allogeneic and syngeneic tumor-host systems. The effect of lentinan treatment was most variable in random-bred Swiss albino mice bearing sarcoma 180. With inbred host strains, it was most effective in A/PH
The antitumor effect of lentinan in syngeneic and autochthonous tumor-host systems and its suppressive effect on 3-methylcholanthrene (MC)-induced carcinogenesis were confirmed using DBA/2 and SWM/Ms hosts. The regressive activity of lentinan against the solid form of Sarcoma 180 was the most
Apparent reduction of leukocyte counts was observed in mice irradiated with 1,500 approximately 3,000 rads of X-ray on the left hind leg. This reduction of leukocyte counts was completely protected by the pre-treatment with lentinan before X-ray irradiation. Suppressive effect of X-ray on the
The cellular site of immunosuppression in Ehrlich tumor-bearing mice was analysed with particular reference to the T- and B-cell activities. The B-cell activity as measured by the anti-dinitrophenyl (DNP) antibody responses to DNP-thymus-independent carriers (TID) was not impaired in tumor-bearing
Lentinan, an antitumor polysaccharide from Lentinus edodes, was degraded to seven fractions by treatment with formic acid. The low molecular-weight fractions (I and II) showed no antitumor activity against sarcoma-180 solid-type tumor and the absorption maximum of Congo Red did not shift in their
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
The antitumor activity of a combination of an antitumor polysaccharide, lentinan (a beta 1-3 glucan with beta 1-6 branches), and interleukin-2 (IL-2) was evaluated against established MBL-2 lymphoma and S908.D2 sarcoma at i.d. sites. Treatment of the MBL-2-tumor-bearing BDF1 mice with lentinan and
Serum X-prolyl dipeptidyl-aminopeptidase activity which had been shown to be depressed in cancer patients was clearly reduced in mice with Ehrlich carcinoma and Sarcoma 180, and slightly reduced in mice with methylcholanthrene-induced sarcomas. The reduced enzyme activity was completely reversed
A (1-->3)-beta-D-glucan having (1-->6) branching (L-FV-IB) from Lentinus edodes in water was degraded into seven fractions of different molecular weights by ultrasonic irradiation, and each was further fractionated into three parts, by precipitation from water into acetone at room temperature. The
The antitumor effect of reserve polysaccharide, paramylon, from Euglena gracilis on the transplantable sarcoma-180 was examined in mice. This polysaccharide had an effect similar to that of lentinan. Paramylon, in a dose of 1 mug/g body weight, injected intraperitoneally 24 hr after tumor
Five fractions of lentinan, a beta-(1-->3)-D-glucan bearing beta-(1-->6)-d-glucopyranosyl branches, were treated with chlorosulfonic acid for 90 min at 60 degrees C in pyridine medium to synthesize water-soluble sulfated derivatives having the substitution degree of 1.44-1.76. The (13)C NMR spectra
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
The four kinds of plant polysaccharides, i.e., pachyman polysaccharides (PPS), Acanthopanax senticosus polysaccharides (ASPS), polysaccharides of tremella fuciformis (TF) and lentinan, have obviously inhibitory action against the animal tumor growth and have been applied to the treatment of cancer.
To determine whether resistance to chemoimmunotherapy is acquired during therapy, we investigated the effects of chemotherapeutic agents and anti-tumour polysaccharide, lentinan, on the progression of Rous sarcoma virus-induced S908.D2 fibrosarcomas. The chemoimmunotherapy was effective against the