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Creator:: Larkin, Andrew, Siddens, Lisbeth K., Krueger, Sharon K., Williams, David E., and Baird, William M.
Abstract:: Epidermal RNA samples from FVB/N mice treated with PAH standards and environmental PAH mixtures were harvested and purified using Trizol extraction and RNeasy mini prep kit purification. Epidermal RNA integrity was low (RIN mean 3.5), indicating significant RNA degradation and the need to modify handling, collection, and processing of skin...
Resource Type:: Research Paper
Full Text:: . Williamsb, William M. Bairdb,* a Department of Bioresource Research, Oregon State University, Corvallis

Creator:: Larkin, Andrew, Siddens, Lisbeth K., Krueger, Sharon K., Tilton, Susan C., Waters, Katrina M., Williams, David E., and Baird, William M.
Abstract:: Polycyclic aromatic hydrocarbons (PAHs) are present in the environment as complex mixtures with components that have diverse carcinogenic potencies and mostly unknown interactive effects. Non-additive PAH interactions have been observed in regulation of cytochrome P450 (CYP) gene expression in the CYP1 family. To better understand and predict biological effects of...
Resource Type:: Article
Full Text:: . Waters c,e, David E. Williams a,c,d,f,⁎, William M. Baird a,c,f a Department of Environmental and

Creator:: Tilton, Susan C., Siddens, Lisbeth K., Krueger, Sharon K., Larkin, Andrew J., Löhr, Christiane V., Williams, David E., Baird, William M., and Waters, Katrina M.
Abstract:: We have previously shown that relative potency factors and DNA adduct measurements are inadequate for predicting carcinogenicity of certain polycyclic aromatic hydrocarbons (PAHs) and PAH mixtures, particularly those that function through alternate pathways or exhibit greater promotional activity compared to benzo[a]pyrene (BaP). Therefore, we developed a pathway based approach for...
Resource Type:: Article
Full Text:: Christiane V. Löhr § , David E. Williams* ,†,‡ , William M. Baird* ,†, , Katrina M. Waters* ,¶ 4 5

Creator:: Shorey, Lyndsey, Castro, David J., Baird, William, Siddens, Beth, Lohr, Christiane, Matzke, Melissa, Waters, Katrina M., Corley, Richard A., and Williams, David E.
Abstract:: Dibenzo[def,p]chrysene (DBC) is a transplacental carcinogen in mice (15 mg/kg; gestation day (GD) 17). To mimic residual exposure throughout pregnancy, dams received 4 smaller doses of DBC (3.75 mg/kg) on GD 5, 9, 13 and 17. This regimen alleviated the previously established carcinogenic responses in the thymus, lung, and liver....
Resource Type:: Article
Full Text:: . Castro1,3, William Baird1,4,5, Beth Siddens1,4,5, Christiane Löhr4,5,6, Melissa Matzke7, Katrina M

Creator:: Siddens, Lisbeth K., Bunde, Kristi L., Harper, Tod A., McQuistan, Tammie J., Löhr, Christiane V., Bramer, Lisa M., Waters, Katrina M., Tilton, Susan C., Krueger, Sharon K., Williams, David E., and Baird, William M.
Abstract:: FVB/N mice wild-type, heterozygous or null for Cyp 1b1 were used in a two-stage skin tumor study comparing PAH, benzo[a]pyrene (BaP), dibenzo[def,p]chrysene (DBC), and coal tar extract (CTE, SRM 1597a). Following 20 weeks of promotion with TPA the Cyp 1b1 null mice, initiated with DBC, exhibited reductions in incidence, multiplicity,...
Resource Type:: Article
Full Text:: , David E. Williams a,b,c,d,⁎, William M. Baird a,b,d a Department of Environmental and Molecular

Creator:: Siddens, Lisbeth K., Larkin, Andrew, Krueger, Sharon K., Bradfield, Christopher A., Waters, Katrina M., Tilton, Susan C., Pereira, Cliff B., Lohr, Christiane V., Arlt, Volker M., Phillips, David H., Williams, David E., and Baird, William M.
Abstract:: The polycyclic aromatic hydrocarbon (PAH), benzo[a]pyrene (BaP), was compared to dibenzo[def,p]chrysene (DBC) and combinations of three environmental PAH mixtures (coal tar, diesel particulate and cigarette smoke condensate) using a two stage, FVB/N mouse skin tumor model. DBC (4 nmol) was most potent, reaching 100% tumor incidence with a shorter latency...
Resource Type:: Article
Full Text:: i, David E. Williams a,b,c,g,⁎, William M. Baird a,b,g a Department of Environmental and Molecular

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