G
George A. Parker
Researcher at Charles River Laboratories
Publications - 52
Citations - 1179
George A. Parker is an academic researcher from Charles River Laboratories. The author has contributed to research in topics: Acute Radiation Syndrome & Immune system. The author has an hindex of 19, co-authored 52 publications receiving 963 citations. Previous affiliations of George A. Parker include University of Maryland, Baltimore.
Papers
More filters
Journal ArticleDOI
Gestational and lactational exposure to potassium perfluorooctanesulfonate (K+PFOS) in rats: Toxicokinetics, thyroid hormone status, and related gene expression
Shu Ching Chang,David J. Ehresman,James A. Bjork,Kendall B. Wallace,George A. Parker,Donald G. Stump,John L. Butenhoff +6 more
TL;DR: As part of a developmental neurotoxicology study for which developmental endpoints, including those related to the developing nervous system, have been reported separately, groups of 25 pregnant Sprague Dawley rats were given daily oral doses of either vehicle control or potassium PFOS to establish the relationship between PFOS concentrations and study outcomes.
Journal ArticleDOI
Gestational and lactational exposure to potassium perfluorooctanesulfonate (K+PFOS) in rats: developmental neurotoxicity.
TL;DR: No significant effect was noted on maternal health or reproductive outcomes from dosing of maternal rats with K(+)PFOS throughout gestation, and mean serum concentrations of PFOS reported in a companion article for the 0.3mg/kg-d group maternal rats are several hundred times higher than those reported for females in the United States general population.
Journal ArticleDOI
Postnatal Ovary Development in the Rat Morphologic Study and Correlation of Morphology to Neuroendocrine Parameters
Catherine A. Picut,Darlene Dixon,Michelle L. Simons,Donald G. Stump,George A. Parker,Amera K. Remick +5 more
TL;DR: B baseline morphologic and endocrinologic information is provided to aid in identification and interpretation of xenobiotic effects in the ovary of the prepubertal rat.
Journal ArticleDOI
Postnatal Development of the Testis in the Rat: Morphologic Study and Correlation of Morphology to Neuroendocrine Parameters
Catherine A. Picut,Amera K. Remick,Eveline P. C. T. de Rijk,Michelle L. Simons,Donald G. Stump,George A. Parker +5 more
TL;DR: The presented baseline morphologic and endocrinologic information will help pathologists distinguish delayed development from xenobiotic effects, determine pathogenesis when confronted with nonspecific findings, and identify sensitive time points for targeted study design.
Journal ArticleDOI
Toxicological evaluation of ammonium perfluorobutyrate in rats: twenty-eight-day and ninety-day oral gavage studies
John L. Butenhoff,James A. Bjork,Shu Ching Chang,David J. Ehresman,George A. Parker,Kaberi P. Das,Christopher Lau,Paul H. Lieder,Francois van Otterdijk,Kendall B. Wallace +9 more
TL;DR: Results of RT-qPCR were consistent with increased transcriptional expression of the xenosensor nuclear receptors PPARα and CAR as well as the thyroid receptor, and decreased expression of Cyp1A1 (Ah receptor-regulated).