nitrosodimethylamine/سرطان

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Effects of a single dose of polychlorinated biphenyls to infant mice on N-nitrosodimethylamine-initiated lung and liver tumors.

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Polychlorinated biphenyls (PCBs) are widespread, chemically-stable environmental contaminants; some congeners are commonly found in human adipose tissue and breast milk. We investigated the effects of a single dose of one PCB mixture (Aroclor 1254) on tumors initiated by N-nitrosodimethylamine

[Development of renal tumors in rats on intermittently injected methylcholanthrene and nitrosodimethylamine].

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Experiments on 892 non-inbred male rats studied the development of renal tumors in the animals intermittently administered two substances different in the mechanism of carcinogenic action. Renal pre-injection of methylcholantherene (MC) in a small dose insufficient to induce renal tumors in the

Comparison of the tumorigenic potential of liver and kidney tumors induced by N-nitrosodimethylamine.

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The aim of the study was to determine the tumorigenic potential of two cell lines established from N-nitrosodimethylamine induced rat hepatocarcinoma (HeDe) and mesenchymal renal tumors (NeDe). The basis of the distinction is that human cancers are known to overexpress facilitative GLUT transporters

Geographic distribution of liver and stomach cancers in Thailand in relation to estimated dietary intake of nitrate, nitrite, and nitrosodimethylamine.

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It is our working hypothesis that the high rate of the liver and gastric cancers in North and Northeast Thailand is associated with increased daily dietary intake of nitrate, nitrite, and nitrosodimethylamine (NDMA). Samples of fresh and preserved Thai foods were systematically collected and

Dietary nitrosodimethylamine and the risk of lung cancer: a case-control study from Uruguay.

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Evidence from animal studies indicates that various N-nitroso compounds are carcinogenic. We investigated whether consumption of nitrosodimethylamine (NDMA) and foods and beverages containing NDMA are carcinogenic for the lung. In a hospital-based case-control study in Uruguay, dietary intake of

von Hippel-Lindau gene mutations in N-nitrosodimethylamine-induced rat renal epithelial tumors.

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BACKGROUND Mutations in the von Hippel-Lindau (VHL) gene are common in human clear cell kidney cancers. Carcinogens in cigarette smoke, especially nitrosamines, are known to induce kidney tumors of a variety of histologic types in rodents--but with no evidence of VHL mutations; however, none of

Comparison of transplacental and neonatal initiation of mouse lung and liver tumors by N-nitrosodimethylamine (NDMA) and 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) and promotability by a polychlorinated biphenyls mixture (Aroclor 1254).

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We have previously shown a positive tumor-promoting effect of a single dose of Aroclor 1254 on lung and liver tumors initiated neonatally in the mouse by N-nitrosodimethylamine (NDMA). In this study, we have confirmed and extended this observation with NDMA and the tobacco-specific nitrosamine,

Consumption of nitrate, nitrite, and nitrosodimethylamine and the risk of upper aerodigestive tract cancer.

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Evidence from animal studies indicates that various N-nitroso compounds are carcinogenic. We investigated whether consumption of foods and beverages containing nitrosodimethylamine, nitrites, and nitrates affected the risk of laryngeal, esophageal, and oral cancer. In a population-based case-control

Dose and time relationships for tumor induction in the liver and esophagus of 4080 inbred rats by chronic ingestion of N-nitrosodiethylamine or N-nitrosodimethylamine.

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A Weibull analysis is presented of the dose and time relationships for the effects on 4080 inbred rats of chronic ingestion in the drinking water of 16 different doses of N-nitrosodimethylamine (NDMA) or N-nitrosodiethylamine (NDEA). The sites chiefly affected were the liver (by both agents) and the

Role of DNA methylation in the activation of proto-oncogenes and the induction of pulmonary neoplasia by nitrosamines.

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The relationships between DNA methylation and repair induced by the tobacco-specific nitrosamine 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) to the activation of proto-oncogenes and the induction of pulmonary neoplasia by this carcinogen is described. The formation of the O6-methylguanine

[Inhibiting effect of the polyphenolic complex from Plantago major (plantastine) on the carcinogenic effect of endogenously synthesized nitrosodimethylamine].

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Amidopyrine administered in combination with sodium nitrite in the long-term experiment produces the toxic damage of the liver and tumors in rats in connection with endogenic synthesis of carcinogenic nitrosodimethylamine. The inclusion into the animal diet of the polyphenolic complex from Plantago

Red meat, dietary nitrosamines, and heme iron and risk of bladder cancer in the European Prospective Investigation into Cancer and Nutrition (EPIC).

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BACKGROUND Previous epidemiologic studies found inconsistent results for the association between red meat intake, nitrosamines [NDMA: N-nitrosodimethylamine, and ENOC (endogenous nitroso compounds)], and the risk of bladder cancer. We investigated the association between red meat consumption,

Suppression of in vivo clearance of N-nitrosodimethylamine in mice by cotreatment with ethanol.

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Oral cotreatment of mice with ethanol results in increased tumors in extrahepatic organs caused by some nitrosamines. This action, attributed in part to inhibition of hepatic first-pass carcinogen metabolism by ethanol, has possible relevance to the enhancing effect of alcoholic beverage consumption

Hyaluronic acid-tumor necrosis factor-related apoptosis-inducing ligand conjugate for targeted treatment of liver fibrosis.

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Liver fibrosis is a chronic liver disease caused by viral infection and/or metabolic, genetic and cholestatic disorders. The inhibition of hepatic stellate cell (HSC) activation and the selective apoptosis of activated HSCs can be a good strategy to treat liver fibrosis. The activated HSCs are known

Ki-ras mutations in spontaneous and chemically induced renal tumors of the rat.

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A high frequency of point mutations at codon 12 of the Ki-ras gene has previously been reported for rat kidney mesenchymal tumors induced by methylating N-nitroso compounds. In this study, we analyzed renal tumors with divergent histogenesis, i.e., mesenchymal tumors (sarcomas), cortical epithelial

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