Zobrazeno 1 - 10
of 100
pro vyhledávání: '"J. Schuppler"'
Publikováno v:
Toxicologic pathology. 10(2)
Putative preneoplastic foci (islands) of altered hepatocytes were induced by single doses of initiating hepatocarcinogens and identified by various histochemical and morphological markers. DNA synthesis, measured by 3H-thymidine and autoradiography,
Publikováno v:
Toxicology and applied pharmacology. 106(3)
The benzofurane derivative benzbromarone (BBR) previously has led to liver tumor formation after long-term treatment of rats, but no indications of genotoxicity were detected. The present studies were designed to elucidate the mechanism(s) possibly i
Publikováno v:
Carcinogenesis. 5:453-458
Numerous drugs, hormones and environmental pollutants induce liver growth by hypertrophy and/or hyperplasia, and promote preferential growth of putative preneoplastic foci in the liver. In the present study the regression of hyperplasia after cessati
Publikováno v:
Research in Experimental Medicine. 165:271-284
In rats a chronic uremic syndrome was induced by 5/6 resection and subsequent irradiation of the kidneys. After 5 weeks 45Ca and 89Sr were injected simultaneously, and the different metabolic handling of the two elements was determined applying an op
Autor:
M J, Mihatsch, H U, Zollinger, F, Gudat, J, Schuppler, U N, Riede, G, Thiel, F, Brunner, F, Enderlin
Publikováno v:
Pathobiology. 43:219-223
Publikováno v:
Toxicologic Pathology. 10:132-143
In standard two year tumorigenicity studies some gestagens, alone or in combination with an estrogen have been shown to produce proliferative liver lesions (PLL) in rats. Estrogens in general have not produced PLLs; for ethinyl estradiol the situatio
Autor:
W. Parzefall, Marianne Kallenbach, Anneliese Gerhardt, R. Schulte-Hermann, J. Schuppler, Verena Hoffman
Publikováno v:
Chemico-Biological Interactions. 31:287-300
Treatment of female Wistar rats with cyproterone acetate (CPA) leads to considerable enlargement of the liver. The organ content of water, dry mass, protein, RNA, and DNA increased in parallel with the enlargement; only lipid accumulation showed a sl
Publikováno v:
Carcinogenesis. 5:149-153
Putative preneoplastic foci of rat liver, so far believed to be deficient in monooxygenases, are shown to contain a cytochrome P450 isoenzyme inducible by phenobarbital. The isoenzyme is also present and appears catalytically active in liver tumors o
Autor:
I. Timmermann-Trosiener, Wilfried Bursch, H. Berger, J. Schuppler, G. Ohde, Rolf Schulte-Hermann
Publikováno v:
Environmental Health Perspectives
A number of different compounds, including phenobarbital, hypolipidemic drugs such as clofibrate and nafenopin, the sex steroids progesterone, cyproterone acetate, estradiol and mestranol, chlorinated hydrocarbons such as DDT, hexachlorocyclohexane,
Autor:
J. Schuppler
Publikováno v:
Protoplasma. 68:457-470
Die Injektion von3H-Thymidin und von Kontrollsubstanzen in bebrutete Huhnereier wurde in bezug auf Lokalisation und Zeit untersucht. Die Absterberate der Embryonen wird bei Injektion von3H-Thymidin in das Amnion am starksten erhoht, geringer bei Appl