putrescine/sarcoma

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Ukurasa 1 kutoka 32 matokeo

Reversal of doxorubicin, etoposide, vinblastine, and taxol resistance in multidrug resistant human sarcoma cells by a polymer of spermine.

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Ingia / Ingia

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

Prevention of 3,4-benzopyrene carcinogenesis in presence of putrescine.

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Ingia / Ingia

The 3,4-Benzopyrene (3,4-BP) carcinogenesis can be postponed or even completely inhibited in the presence of Putrescine (P). A single s.c. injection of 2.52 mg 3,4-BP in 0.5 ml tricaprylin on female mice (NMRI-strains, 4--5 weeks old, 20--25 g of body weight) induced locally malignant tumors

Effects on tumor induction, growth, metastasis and histology of concurrent administration of putrescine and its metabolizing inhibitor alpha-difluoromethylornithine in nickel tumorigenesis in soft tissue.

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Ingia / Ingia

The effects of putrescine and the inhibitor of its biosynthesis alpha-difluoromethylornithine (DFMO) on nickel tumorigenesis in soft tissue was studied. Three groups of female F-344 rats were injected i.m. with 10 mg of nickel subsulfide (NiSS) in the right hind leg, after which one group was

Causal relationship between a tumour growth and the changes in histamine metabolism in tissues of sarcoma-bearing rat.

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Ingia / Ingia

The relationship between malignancy and histamine metabolism in the liver and the small intestine has been examined in sarcoma-bearing Wistar rats two weeks after subcutaneous implantation of a transplantable methylcholanthrene sarcoma Sa1828 and on the 3, 7 and 14th days after tumour extirpation.

Enhancing effect of polyamines on yield of film sarcoma.

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Ingia / Ingia

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

Specific increase in polyamine levels in chick embryo cells transformed by Rous sarcoma virus.

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Ingia / Ingia

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.

Effect of 5'-deoxy-5'-isobutylthioadenosine on putrescine uptake and polyamine biosynthesis by chick embryo fibroblasts.

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Ingia / Ingia

The effect of 5'-deoxy-5'-S-isobutylthioadenosine (SIBA) on polyamine biosynthesis has been studied by using cultured chick embryo fibroblasts. It has been shown that the drug inhibits the uptake of [14C]putrescine and its conversion into labelled spermidine or spermine. The inhibitory effect is

[Polyamine content in tissues of 7,12-dimethyl-benz(a)anthracene-induced sarcoma and liver of tumor-carrying rats].

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Ingia / Ingia

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

Formation of acetylpolyamines and putrescine from spermidine by normal and transformed chick embryo fibroblasts.

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Ingia / Ingia

Polyamine uptake and metabolism were studied in cultures of normal and Rous sarcoma virus-transformed chick embryo fibroblasts. The uptake of radioactive putrescine and spermidine by the transformed cells was faster than that of the normal controls. The amount of radioactive putrescine and

Formation of cadaverine as an effect of alpha-difluoromethylornithine on chick embryo fibroblasts transformed by rous sarcoma virus.

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Ingia / Ingia

Chick embryo fibroblasts grew normally in the presence of 1 X 10(-3) to 10 X 10(-3) M alpha-difluoromethylornithine (DFMO). This drug did not interfere with protein and DNA synthesis of normal fibroblasts and of cells transformed by Rous sarcoma virus. The morphological appearance of normal and

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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Ingia / Ingia

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

Ornithine decarboxylase induction during B1 progression of normal and Rous sarcoma virus-transformed cells.

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Ingia / Ingia

Ornithine decarboxylase (ODC) induction during G1 phase of the cell cycle was compared in Rat-1 fibroblasts and in Rat-1 fibroblasts transformed by the B77 wild-type Rous sarcoma virus (RSV) and by the thermosensitive mutant LA24/RSV. In Rat-1 cells, maximal enzyme activity detectable at mid G1

Temperature-dependent and transformation-associated changes in polyamine metabolism in normal and Rous sarcoma virus-infected chick embryo fibroblasts.

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Ingia / Ingia

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

Polyamine levels in sarcoma-bearing rats in relation to growth and necrosis of the tumour cells.

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Ingia / Ingia

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

Diamine oxidase and polyamine oxidase activities in normal and transformed cells.

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Ingia / Ingia

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

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