Zobrazeno 1 - 10
of 106
pro vyhledávání: '"Shozo Takayama"'
Publikováno v:
Proceedings of the Japan Academy. Series B, Physical and Biological Sciences
This review covers chemical carcinogenesis studies in nonhuman primates performed by the National Cancer Institute, USA, to provide hitherto unavailable information on their susceptibility to compounds producing carcinogenic effects in rodents. From
Publikováno v:
Journal of Veterinary Epidemiology. 6:19-23
平成13年4月, A農場 (酪農, 飼養頭数: 220頭; 長野県) で, 流産した牛1頭にネオスポラ抗体が確認されたため, 浸潤状況と損失を分析し, 対策を検討した。その結果, 搾乳牛130頭を調査し, 陽性
Autor:
S. L. Johansson, M. Tsutsumi, Unnur P. Thorgeirsson, A. G. Renwick, Dalgard Dw, Shozo Takayama, S. M. Sieber
Publikováno v:
Toxicological Sciences. 53:33-39
Twenty-one monkeys (cynomolgus, rhesus, African green) were fed cyclamate (100 mg/kg and 500 mg/kg) in the diet five times per week from a few days after birth and continuing for up to 24 years. Malignant tumors were diagnosed in three 24-year-old cy
Publikováno v:
Journal of Cancer Research and Clinical Oncology. 125:219-225
Because of reports on tumorigenic activity in different animal species exposed to DDT a decision was made in 1969 to evaluate the long-term effects of DDT on 24 cynomolgus and rhesus monkeys. DDT (20 mg/kg) was given in the diet for 130 months, follo
Autor:
Susan M. Sieber, Unnur P. Thorgeirsson, Samuel M. Cohen, Steven H. Eklund, Dan W. Dalgard, Richard H. Adamson, Lora L. Arnold, Shozo Takayama, M. Cano
Publikováno v:
JNCI: Journal of the National Cancer Institute. 90:19-25
Background: It was observed in the early 1970s that saccharin produced bladder cancer in rats. However, it has been unclear whether sodium saccharin when consumed by humans poses a substantial carcinogenic hazard. Numerous epidemiologic studies have
Publikováno v:
Carcinogenesis. 1(2)
The binding of benzo(a)pyrene (BP) to DNA in the presence of liver microsomal preparations from 3-methylcholanthrene-treated rats was increased 28.5% (P < 0.001) by addition of UDP-glucuronic acid to the incubation mixture at a 100 microM concentrati
Autor:
Amit Ghoshal, Elizabeth G. Snyderwine, Karl-Heinz Preisegger, Snorri S. Thorgeirsson, Shozo Takayama
Publikováno v:
Carcinogenesis. 15:2429-2433
2-Amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PhIP), a carcinogen found in cooked meat, was determined to be a mammary carcinogen in female Sprague-Dawley rats on a high fat diet. Forty-three-day-old female Sprague-Dawley rats received 10 doses of
Publikováno v:
Mutation Research/Genetic Toxicology. 259:399-410
Mutagenic heterocyclic amines in cooked foods were carcinogenic to mice, rats and/or monkeys, when they were given orally continuously. The most common target organ was the liver, but in CDF1 mice lung tumors, forestomach tumors, lymphomas/leukemias,
Autor:
Hiroko Ohgaki, Takashi Sugimura, Shozo Takayama, Zoltan Szentirmay, Keiichi Maruyama, Hiroyasu Esumi
Publikováno v:
Japanese Journal of Cancer Research : Gann
A signet ring cell carcinoma in the gastric antrum of a Cynomolgus monkey induced by N‐ethyl‐N′‐nitro‐N‐nitrosoguanidine was sequentially studied by endoscopy, biopsy, and autopsy. The carcinoma was first detected on the angulus of the st
Autor:
Dan W. Dalgard, Richard H. Adamson, Unnur P. Thorgeirsson, Snorri S. Thorgeirsson, Elizabeth G. Snyderwine, Takashi Sugimura, Shozo Takayama, Jeanette Reeves
Publikováno v:
Japanese Journal of Cancer Research : Gann
The carcinogenic potential of 2‐amino‐3‐methylimidazo[4,5f]quinoline (IQ) was evaluated in cynomolgus monkeys. Monkeys received IQ, beginning at the age of one year, at doses of 10 or 20 mg/kg by gavage. Thus far, IQ has induced hepatocellular