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Page 1 de 53 résultats
Enhancing effect of polyamines on yield of film sarcoma.
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The salts of the natural polyamines, protamine sulphate, clupeine sulphate, spermidine phosphate, putrescine dihydrochloride and spermine diphosphate, and of the synthetic poly-L-lysine hydrobromide (mol. wt 85 k) and poly-L-arginine hydrochloride (mol. wt 50 k) were tested for their effect on film
[Polyamines in malignant lymphoma of the skin and in Kaposi's sarcoma].
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High-pressure liquid chromatography was used to detect polyamines, the markers of lymphoproliferative diseases of the skin and of Kaposi's sarcoma. The urine polyamine detection may become one of the diagnostic tests in these conditions, but its findings should be confirmed by clinical and
[The effectiveness of treating patients with malignant skin lymphoma and Kaposi's sarcoma studied via polyamines].
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Lymphoproliferative diseases of the skin and Kaposi's sarcoma were found to involve high excretion of polyamines. Therapy with reaferon combined with prospidine and indomethacin improved the clinical course of the process and was associated with a decrease of polyamine excretion. Measurement of the
Specific increase in polyamine levels in chick embryo cells transformed by Rous sarcoma virus.
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Chick embryo fibroblasts and chorioallantoic membranes of chick embryos infected with oncogenic or nononcogenic viruses were analyzed for polyamines. Nononcogenic viruses (influenze, Newcastle disease, or vaccinia virus) had no effect on the polyamine content of chorioallantoic membranes.
[Polyamine content in tissues of 7,12-dimethyl-benz(a)anthracene-induced sarcoma and liver of tumor-carrying rats].
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Putrescine in determinable amounts is contained in the tumour tissue, in the liver tissue of normal animals it was not detected by the applied method. The spermidine content in the tumour is also considerably higher, it is 15.-3 times as high as that in the normal liver both per 1 g of fresh tissue
Effect of DL-alpha-hydrazino-delta-aminovaleric acid, an inhibitor of ornithine decarboxylase, on polyamine metabolism and growth of mouse sarcoma-180.
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DL-alpha-Hydrazino-delta-aminovaleric acid (DL-HAVA) is a potent and fairly specific inhibitor of ornithine decarboxylase (EC 4.1.1.17). Its effect on polyamine metabolism and cell proliferation was investigated in sarcoma-180, inoculated into the axillary region of mice. In the tumor tissues, the
Temperature-dependent and transformation-associated changes in polyamine metabolism in normal and Rous sarcoma virus-infected chick embryo fibroblasts.
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Tertiary cultures of chick embryo fibroblasts infected and transformed by the wild-type Rous sarcoma virus, when actively growing at 35 degrees C, had higher putrescine levels than the respective uninfected cells. Transformed cells also had much higher specific activity of ornithine decarboxylase
Effects of in vitro polyamine treatment on LDH isoenzyme patterns in Yoshida sarcoma cells and in former macrophages.
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LDH isoenzyme shifts are frequently observed in several malignant neoplasm when compared with the corresponding normal tissues. In the present work, we studied LDH isoenzyme behaviour both in Yoshida cells and in founder macrophages, before and after polyamine treatment. The choice of polyamine was
Polyamine levels in sarcoma-bearing rats in relation to growth and necrosis of the tumour cells.
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Putrescine (PU), spermidine (SPD) and spermine (SPM) levels in blood serum of MC Sa 1828 P-bearing rats have been studied in relation to tumour weight and the histological picture. A statistically significant increase of PU and SPD was found in the course of tumour development. Decrease in the level
Polyamines and tumor cells: effect of transformation of chick embryo fibroblasts by Rous sarcoma virus on polyamine levels.
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The effect of antibodies anti-polyamine on the growth of sarcoma T.R.V.L. 53886 in mice.
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Reversal of doxorubicin, etoposide, vinblastine, and taxol resistance in multidrug resistant human sarcoma cells by a polymer of spermine.
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We have previously described the synthesis of a cytotoxic polymeric conjugate of spermine (Poly-SPM) which is able to inhibit the transport of polyamines (spermine, spermidine, and putrescine) into normal and malignant cells. Recent studies examining the toxicity of Poly-SPM in parental and
Cell proliferative modulation of MCG 101 sarcoma from mice exposed to hyperbaric oxygenation.
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Tumor cell kinetics were studied in C57 Bl/J mice with a transplantable sarcoma, MCG 101, exposed to hyperbaric oxygen (HBO2), 2.8 atm abs, 2 hours daily for 9 days or until spontaneous death. The isoenzymatic pattern of lactate dehydrogenase (LDH) confirmed that there was a significant shift toward
Diamine oxidase and polyamine oxidase activities in normal and transformed cells.
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1. The activity of diamine oxidase (EC 1.4.3.6) in normal rat kidney cells and in normal rat kidney cells transformed by avian sarcoma virus (B77 strain) growing in tissue culture varies with the stage of growth. There is an initial stimulation of activity by 24h after seeding, followed by a steep
Red blood cell polyamine levels and host toxicity during continuous alpha-difluoromethylornithine infusion.
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The dose effects of continuous alpha-difluoromethylornithine (DFMO) infusion on red blood cell (RBC) polyamine levels, host toxicity and tumor growth were determined. Male rats with and without a transplantable methylcholanthrene-induced sarcoma received intravenously either 0.45% NaCl or DFMO at
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