Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Donald M. Sells"'
Autor:
Donald M. Sells, Abraham Nyska, Katsuhiko Yoshizawa, Amy E. Brix, Micheal P. Jokinen, Michael E. Wyde, Nigel J. Walker, Grace E. Kissling
Publikováno v:
Toxicologic Pathology. 38:1037-1050
2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) and structurally-similar dioxin-like compounds affect thyroid function and morphology and thyroid hormone metabolism in animals and humans. The National Toxicology Program conducted eight 2-year gavage studi
Autor:
Abraham Nyska, Grace E. Kissling, Micheal P. Jokinen, Katsuhiko Yoshizawa, Denis P. Orzech, Donald M. Sells, Nigel J. Walker, Michael E. Wyde, Amy E. Brix
Publikováno v:
Toxicologic Pathology. 37:921-937
Results from previously published animal studies suggest that prenatal and postnatal exposure to dioxin and dioxin-like compounds (DLCs) may profoundly affect the reproductive system of both sexes via endocrine disruption. In the present work, we eva
Autor:
Joseph K. Haseman, Donald M. Sells, Abraham Nyska, Micheal Easterling, Ming Yin, Nigel J. Walker, Christopher J. Portier, James R. Hailey, Michael E. Wyde, Michael P. Jokinen, Amy E. Brix, Patrick W. Crockett, John R. Bucher
Publikováno v:
Environmental Health Perspectives
Use of the dioxin toxic equivalency factor (TEF) approach in human risk assessments assumes that the combined effects of dioxin-like compounds in a mixture can be predicted based on a potency-adjusted dose-additive combination of constituents of the
Autor:
Abraham Nyska, Donald M. Sells, Micheal P. Jokinen, Denise Orzech, Nigel J. Walker, Tiwanda Marsh, Michael E. Wyde, Amy E. Brix, Katsuhiko Yoshizawa, Joseph K. Haseman
Publikováno v:
Toxicological Sciences. 83:64-77
We evaluated gingival toxicities induced by chronic exposure of female Harlan Sprague-Dawley rats to dioxin and dioxin-like compounds (DLCs) and compared them to similarly induced oral lesions reported in the literature. This investigation represents
Publikováno v:
Toxicologic Pathology. 32:333-337
To test the dioxin toxic equivalency factor methodology, the National Toxicology Program conducted a series of 2-year rat bioassays of dioxin-like compounds. Following gavage exposure of female Harlan Sprague—Dawley rats to 2,3',4,4',5-pentachlorob
Autor:
Abraham Nyska, Joseph K. Haseman, Nigel J. Walker, Amy E. Brix, Donald M. Sells, Micheal P. Jokinen
Publikováno v:
Cardiovascular Toxicology
The effects of chronic exposure to dioxin (2,3,7,8,-tetrachlorodibenzo-p-dioxin [TCDD]) and a dioxin-like compound (3,3′,4,4′,5-pentachlorobiphenyl [PCB126]) on the cardiovascular system were evaluated in female Harlan Sprague-Dawley rats as part
Publikováno v:
Toxicologic Pathology. 23:518-526
Primary benign and malignant vascular neoplasms occurred spontaneously in 8 of 710 male (1.1%) and 4 of 710 female (0.6%) CrI:CD®Br strain Sprague-Dawley rats employed in two 2-yr oncogenicity studies (1,400) and as controls in a 1-yr toxicity study
Publikováno v:
Toxicologic Pathology. 20:327-340
A total of 93 tumors of the epidermis, its appendages, and dermis were observed in 1,433 (717 males, 716 females) rats employed in oncogenicity studies over a 2-yr period. Mammary gland neoplasms will be reported separately. Fifty-seven (61.3%) were
Publikováno v:
Toxicologic Pathology. 20:253-259
Spontaneous primary epithelial neoplasms of the intestinal tract occurred in 6/682 (0.9%) male and 1/694 (0.1%) female Sprague-Dawley rats. Six of 7 neoplasms were adenocarcinomas, and 1 of 7 was an adenoma. Metastasis to the liver or lung occurred i
Publikováno v:
Toxicologic Pathology. 20:125-130
Primary neoplasms of the kidneys occurred in 11/682 male (1.6%) and 2/694 female (0.3%) Crl:CD®Br strain Sprague-Dawley rats. Eight of 13 neoplasms were of mesenchymal origin and 5 of 13 were epithelial. Five neoplasms were lipoma (3) or liposarcoma