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phenylhydrazine/neoplasms
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Tumor induction with the N'-acetyl derivative of 4-hydroxymethyl-phenylhydrazine, a metabolite of agaritine of Agaricus bisporus.
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N'-Acetyl-4-(hydroxymethyl)phenylhydrazine was administered as a 0.0625% solution in drinking water continuously for the life span of Swiss mice, from 6 weeks of age. Compared to that in untreated controls, in treated animals the lung tumor incidence rose from 15 to 34% in females and 22 to 48% in
Coincident implantation, growth and interaction sites within the liver of cancer and reactive hematopoietic cells.
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We have examined the anatomical-functional sites within mouse liver where phenylhydrazine (PHZ)-induced hematopoietic foci, and M5076 reticulum cell sarcoma, B16F10 melanoma and Lewis lung-carcinoma cells specifically develop as colonies after intrasplenic injection. Cancer foci occurred
Tumorigenic effects of chronic administration of benzylhydrazine dihydrochloride and phenylhydrazine hydrochloride in Swiss mice.
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Separate solutions of 0.015% benzylhydrazine dihydrochloride and 0.01% phenylhydrazine hydrochloride were given continuously in the drinking water of 6- and 5-week-old randomly bred Swiss mice for the remainder of their life. The consumption of benzylhydrazine dihydrochloride significantly increased
Two forms of thymidine kinase in normal and tumor tissues of animals.
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The thymidine kinases extracted from the spleen of mice infected with Friend virus and from Yoshida sarcoma in rats were separated into two active peaks by diethylaminoethyl cellulose column chromatography, while those of normal tissues have been found to consist of only the first peak (P-1). The
Direct relationship between radiobiological hypoxia in tumors and monoclonal antibody detection of EF5 cellular adducts.
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While the potential importance of hypoxia in limiting the sensitivity of tumor cells to ionizing radiation has long been appreciated, methods for accurately quantifying the number of radiation-resistant hypoxic cells within tumors have been lacking. We have used the pentafluorinated derivative
Manipulations in the oxygen transport capacity of blood as a means of sensitizing tumors to radiation therapy.
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Tumor response to radiation is dependent not only on the quantity of hemoglobin (Hb) available for oxygen (O2) transport but also on the position of the Hb-O2 dissociation curve (Hb affinity). Previous studies have shown that administering agents which shift the Hb-O2 dissociation curve to the right
Toxicogenomics of Phenylhydrazine Induced Hematotoxicity and its Attenuation by Plumbagin from Plumbago zeylanica.
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BACKGROUND
High regenerative and proliferative capacity of blood and its components renders it to be at higher risk of adverse drug reactions (ADRs) which are manifested in several treatment regimens against various ailments such as cancers, viral diseases, and several metabolic
Comparative effect of melatonin and vitamin E on phenylhydrazine-induced toxicity in the spleen of Funambulus pennanti.
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Phenylhydrazine (PHZ) oxidation resulting in free iron release followed by free radical generation has increased frequency of cancer. This study aims towards the dose-dependent response of PHZ and the role of melatonin in comparison with vitamin E following PHZ-induced toxicity within the lymphoid
Carbidopa is an activator of aryl hydrocarbon receptor with potential for cancer therapy.
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Carbidopa is used with l-DOPA (l-3,4-dihydroxyphenylalanine) to treat Parkinson's disease (PD). PD patients exhibit lower incidence of most cancers including pancreatic cancer, but with the notable exception of melanoma. The decreased cancer incidence is not due to l-DOPA; however, the relevance of
Synthesis, antimicrobial and anti-cancer activities of some new N-ethyl, N-benzyl and N-benzoyl-3-indolyl heterocycles.
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A series of 1-(N-substituted-1H-indol-3-yl)-3-arylprop-2-ene-1-ones (2a, b-4a, b) were prepared and allowed to react with urea, thiourea or guanidine to give pyrimidine derivatives 5a, b-13a, b. Reaction of 2a, b-4a, b with ethyl acetoacetate in the presence of a base gave cyclohexanone derivatives
Agaritine purified from Agaricus blazei Murrill exerts anti-tumor activity against leukemic cells.
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BACKGROUND
Mushrooms of the genus Agaricus are a common folk remedy against carcinoma. The active ingredients, polysaccharides and protein-polysaccharide complexes containing beta-glucan, have been isolated and shown to have indirect tumor-suppressing activity via an immunological
Synthesis and in vitro anti-tumor activity of new oxadiazole thioglycosides.
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A facile, convenient and high yielding synthesis of novel thioglycosides incorporating 1,3,4-oxadiazole, triazole and or triazine moieties from readily available starting materials has been described. The key step of this protocol is the formation of 3-isobutyl-1-phenyl-1H-pyrazole-4-carbaldehyde
Mass spectrometric study of N-glycans from serum of woodchucks with liver cancer.
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Woodchucks have been a preferred lab animal model of chronic hepatitis B viral infection. The model recapitulates the disease progression of HBV infection to hepatocellular carcinoma (HCC) and has documented similarities in protein glycosylation with human HCC. This study examined N-glycans in serum
Expression of red cell membrane proteins in erythroid precursor cells.
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Specific antibodies to human glycophorin A and spectrin were used to study the expression of these membrane proteins in normal and pathologic human bone marrow. In immunofluorescence experiments spectrin and glycophorin A are found in 50-60% of the nucleated cells in normal bone marrow. These two
The mechanism of the inhibitory effect of polyamines on the induction of nitric oxide synthase: role of aldehyde metabolites.
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1. We have recently found that in the presence, but not in the absence, of foetal calf serum, spermine inhibits the production of nitric oxide (NO) in cultured J774.2 macrophages stimulated with bacterial endotoxin (lipopolysaccharide; LPS) or with gamma-interferon (IFN), showing that polyamines may
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