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aflatoxin b 1/krebs
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Carcinogenicity of aflatoxin B1 in rhesus monkeys: two additional cases of primary liver cancer.
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Three of 42 (7%) monkeys given aflatoxin B1 (AFB1) for longer than 2 years have developed primary malignant neoplasms of the liver. Liver biopsies performed at intervals during aflatoxin administration revealed that neoplasia was preceded by pathologic lesions of the liver, including toxic
Aflatoxin B1 and/or hepatitis B virus induced tumor spectrum in a genetically engineered hepatitis B virus expression and Trp53 haploinsufficient mouse model system for hepatocarcinogenesis.
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The authors investigated the spectrum of tumors and Trp53 mutations in genetically engineered models using the FVB/N mouse that expressed the hepatitis B virus genome and/or carried a Trp53 null and wildtype allele and/or were exposed to aflatoxin B1. Liver tumor incidence was increased when all
[Relationship between lung cancer and aflatoxin B1].
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The relationship between aflatoxins and liver cancer is well established. In addition the inhalation exposure to carcinogen aflatoxin B1 (AFB 1) is considerable. Genotoxic chemical is known to react with DNA either directly or after metabolic activation to form adducts, a step thought to be relevant
Protection against aflatoxin B1-induced hepatic toxicity as short-term screen of cancer chemopreventive dithiolethiones.
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Dithiolethiones are an important class of cancer chemopreventive agents. More than 50 new dithiolethione analogs were synthesized for structure-activity studies. Using selected dithiolethiones, studies were designed to measure protection against the hepatotoxicity of aflatoxin B1 (AFB1) and relate
Regulation of rat glutathione S-transferase A5 by cancer chemopreventive agents: mechanisms of inducible resistance to aflatoxin B1.
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The rat can be protected against aflatoxin B1 (AFB1) hepatocarcinogenesis by being fed on a diet containing the synthetic antioxidant ethoxyquin. Evidence suggests that chemoprotection against AFB1 is due to increased detoxification of the mycotoxin by one or more inducible drug-metabolising
Bacterial lipopolysaccharide enhances aflatoxin B1 hepatotoxicity in rats by a mechanism that depends on tumor necrosis factor alpha.
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Exposure to a nontoxic dose of bacterial endotoxin (lipopolysaccharide [LPS]) potentiates the hepatotoxicity of aflatoxin B(1) (AFB(1)). Because some of the pathophysiologic effects associated with LPS are mediated through tumor necrosis factor alpha (TNF-alpha), this study was conducted to explore
Risk assessment of aflatoxin-related liver cancer in Bangladesh.
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Aflatoxins are mycotoxins (fungal toxins) produced by Aspergillus species in variety of food commodities. Consumption of aflatoxin-contaminated food can cause adverse health effects, including liver cancer. Aflatoxin exposure is usually higher in hot and humid countries. Previous biomarker-based
Aflatoxin contamination of red chili pepper from Bolivia and Peru, countries with high gallbladder cancer incidence rates.
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Chilean red chili peppers contaminated with aflatoxins were reported in a previous study. If the development of gallbladder cancer (GBC) in Chile is associated with a high level of consumption of aflatoxin-contaminated red chili peppers, such peppers from other countries having a high GBC incidence
Cancer risk and occupational exposure to aflatoxins in Denmark.
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A study of cancer risk among male employees at 241 livestock feed processing companies in Denmark was conducted on the basis of a data linkage system for detailed investigation of occupational cancer providing employment histories back until 1964, established at the Danish Cancer Registry. Crops
Aflatoxin as a cause of primary liver-cell cancer in the United States: a probability study.
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Primary liver-cell cancer (PLC) mortality ratios, computed from death certificate records compiled by the National Center for Health Statistics, for the periods 1968-1971 and 1973-1976 were sorted by race, sex, urbanization, and region. From this sort, rural white males from the Southeast and the
Aflatoxin Exposure from Milk in Rural Kenya and the Contribution to the Risk of Liver Cancer.
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Milk is an important commodity in Kenya; the country has the largest dairy herd and highest per capita milk consumption in East Africa. As such, hazards in milk are of concern. Aflatoxin M1 (AFM1) is a toxic metabolite of aflatoxin B1 (AFB1) excreted in
Aflatoxin, Tobacco, Ammonia and the p53 Tumor-Suppressor Gene: Cancer's Missing Link?
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Aflatoxin, the fungal carcinogen first identified in 1960, is now recognized as the prototypical laboratory carcinogen. It causes mutations in the p53 tumor-suppressor gene as well as ras mutations, which are involved in the majority of human cancers. Aflatoxin has been shown to contaminate tobacco
Aflatoxin exposure measured by urinary excretion of aflatoxin B1-guanine adduct and hepatitis B virus infection in areas with different liver cancer incidence in Kenya.
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Two major etiological agents, hepatitis B virus and aflatoxin B1, are considered to be involved in the induction of liver cancer in Africa. In order to elucidate any synergistic effect of these two agents we conducted a study in various parts of Kenya with different liver cancer incidence in order
Molecular biomarkers for aflatoxins and their application to human cancer prevention.
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The rapidly expanding understanding of the progressive processes of carcinogenesis provides opportunities for the identification of molecular biological markers reflecting events from exposure through clinical disease. These molecular biological markers can be classified into categories of markers
Effect of subchronic aflatoxin exposure on growth and progression of Ehrlich's ascites tumor in mice.
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The present investigation was undertaken to assess whether aflatoxin B1 (AFB1) has any modulatory effect on the growth and progression of Ehrlich's ascites tumor (EAT) in mice or not. Male Swiss albino mice were treated with 0, 70, 350 and 700 micrograms AFB1/kg body weight in 0.2 ml corn oil on
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