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Salivary testosterone levels in preadolescent children
Background Saliva reflects the plasma free fraction of testosterone which is biologically active, and available for uptake by tissues. Testosterone concentration in saliva, though differing slightly from the concentration of unbound testosterone in serum, is in good correlation with the latter, indicating that salivary testosterone provides a reliable method for determination of serum free testosterone. The study aimed to investigate salivary testosterone levels and their changes in preadolescent children and to study sexual dimorphism. Methods Testosterone levels were determined in 203 healthy preadolescent children (77 girls and 126 boys) from saliva samples by radioimmunoassay. Sampling was performed once a year with respect to circadian and seasonal fluctuations of testosterone. Data were statistically analyzed by Statgraphic software. Results Mean salivary testosterone concentrations (± SD) were 0.038 ± 0.012 nmol/L and 0.046 ± 0.026 nmol/L for girls and boys, with the medians 0.035 nmol/L and 0.041 nmol/L, respectively. Statistical analysis did not prove changes in salivary testosterone concentrations in the preadolescent period of life, with an exception of the insignificant fall at the age of 7 years, and an insignificant rise at the age of 9 years in girls. Conclusions Generally it can be concluded that salivary testosterone levels in our prepubertal subjects remained stable. There was no significant increase of salivary testosterone levels from the age of 6 until the age of 9 in both sexes. Sexual dimorphism in salivary testosterone levels was proved with significantly higher (p = 0.009) salivary testosterone levels in boys than in girls.
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Establishing the “Biological Relevance” of Dipentyl Phthalate Reductions in Fetal Rat Testosterone Production and Plasma and Testis Testosterone Levels
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metadata sheet, data sheet for each table and figure in the published manuscript. This dataset is associated with the following publication: Gray , E., J. Furr , K. Tatum-Gibbs, C. Lambright , H. Sampson, B. Hannas, V. Wilson , A. Hotchkiss , and P. Foster. Establishing the Biological Relevance of Dipentyl Phthalate Reductions in Fetal Rat Testosterone Production and Plasma and Testis Testosterone Levels. TOXICOLOGICAL SCIENCES. Society of Toxicology, 149(1): 178-91, (2016).
biological relevance of reductions of testosterone production on the adverse effects of in utero phthalate combinations
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RAW DATA, SAS FILES AND DATA MEANS. This dataset is associated with the following publication: Howdeshell, K., C. Rider, V. Wilson , J. Furr , C. Lambright , and E. Gray. Dose addition models based on biologically-relevant reductions in fetal testosterone accurately predict postnatal reproductive tract alterations by a phthalate mixture in rats. TOXICOLOGICAL SCIENCES. Society of Toxicology, 148(2): 488-502, (2015).
genomic and endocrine effects of in utero p[hthalates
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effects of in utero phthalate and other chemical administration on male rat sexual differentiation: Non PPAR mediated AOP. This dataset is associated with the following publication: Gray, E., J. Conley, C. Lambright, N. Evans, J. Furr, V. Wilson, B. Hannas, P. Foster, and H. Sampson. Genomic and Hormonal Biomarkers of Phthalate-induced Male Rat Reproductive Developmental Toxicity: Part II A Targeted RT-qPCR Array Approach that Defines a Unique Adverse Outcome Pathway.. TOXICOLOGICAL SCIENCES. Society of Toxicology, RESTON, VA, 182(2): 195-214, (2021).
In vitro transcriptomic analyses reveal pathway perturbations, estrogenic activities, and potencies of data-poor BPA alternative chemicals
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GEOSite dataset for article 'In vitro transcriptomic analyses reveal pathway perturbations, estrogenic activities, and potencies of data-poor BPA alternative chemicals '. This dataset is associated with the following publication: Matteo, G., K. Leingartner, A. Rowan-Carroll, M. Meier, A. Williams, M. Beal, M. Gagne, R. Farmahin, S. Wickramasuriya, A.J. Reardon, T. Barton-Maclaren, J. Corton, C. Yauk, and E. Atlas. In vitro transcriptomic analyses reveal pathway perturbations, estrogenic activities, and potencies of data-poor BPA alternative chemicals. TOXICOLOGICAL SCIENCES. Society of Toxicology, RESTON, VA, 191(2): 266-275, (2023).
Raw data presented in manuscript "The Pollutant Perfluorohexane Sulfonate (PFHxS) Reduces Serum Thyroxine but Does Not Alter Thyroid Hormone Action in the Postnatal Rat Brain" by O'Shaughnessy et al. 2024.
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Raw data to accompanying manuscript "The Pollutant Perfluorohexane Sulfonate (PFHxS) Reduces Serum Thyroxine but Does Not Alter Thyroid Hormone Action in the Postnatal Rat Brain". This dataset is associated with the following publication: O'Shaughnessy, K., K. Bell, A. Sasser, M. Gilbert, C. Riutta, J. Ford, J. McCord, and C. Wood. The Pollutant Perfluorohexane Sulfonate (PFHxS) Reduces Serum Thyroxine but Does Not Alter Thyroid Hormone Action in the Postnatal Rat Brain. ENVIRONMENT INTERNATIONAL. Elsevier B.V., Amsterdam, NETHERLANDS, 190: 108838, (2024).
WF Sperm Data
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Data from manuscript Episodic Exposure to Eucalyptus Smoke during Sperm Maturation Impairs Sperm Motility in Long Evans Rats. This dataset is associated with the following publication: Klinefelter, G., J. Dye, L. Strader, H. Nguyen, M. Schladweiler, G. Palmer, M. Moore, P. Evansky, M. Higuchi, M. Monsees, I. George, M. Hays, J. Martin, N. Warren, W. Williams, B. Yoo, R. Grindstaff, W. Padgett, I. Gilmour, and C. Miller. Episodic exposure to eucalyptus smoke during sperm maturation impairs sperm motility in Long Evans rats.. ENVIRONMENTAL SCIENCE & TECHNOLOGY. American Chemical Society, Washington, DC, USA, 59(28): 14314–14323, (2025).
Systems Toxicology of Male Reproductive Development: Profiling 774 Chemicals for Molecular Targets and Adverse Outcomes
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Background: Trends in male reproductive health have been reported for increased rates of testicular germ cell tumors, low semen quality, cryptorchidism, and hypospadias, which have been associated with prenatal environmental chemical exposure based on human and animal studies. Objective: In the present study we aimed to identify significant correlations between environmental chemicals, molecular targets, and adverse outcomes across a broad chemical landscape with emphasis on developmental toxicity of the male reproductive system. Methods: We used U.S. EPA’s animal study database (ToxRefDB) and a comprehensive literature analysis to identify 774 chemicals that have been evaluated for adverse effects on male reproductive parameters, and then used U.S. EPA’s in vitro high-throughput screening (HTS) database (ToxCastDB) to profile their bioactivity across approximately 800 molecular and cellular features. Results: A phenotypic hierarchy of testicular atrophy, sperm effects, tumors, and malformations, a composite resembling the human testicular dysgenesis syndrome (TDS) hypothesis, was observed in 281 chemicals. A subset of 54 chemicals with male developmental consequences had in vitro bioactivity on molecular targets that could be condensed into 156 gene annotations in a bipartite network. Conclusion: Computational modeling of available in vivo and in vitro data for chemicals that produce adverse effects on male reproductive end points revealed a phenotypic hierarchy across animal studies consistent with the human TDS hypothesis. We confirmed the known role of estrogen and androgen signaling pathways in rodent TDS, and importantly, broadened the list of molecular targets to include retinoic acid signaling, vascular remodeling proteins, G-protein coupled receptors (GPCRs), and cytochrome P450s. This dataset is associated with the following publication: Leung , M., J. Phuong , N. Baker , N. Sipes , G. Klinefelter , M. Martin , K. McLaurin, W. Setzer , S. Darney , R. Judson , and T. Knudsen. (ENVIRONMENTAL HEALTH PERSPECTIVES) Systems Toxicology of Male Reproductive Development: Profiling 774 Chemicals for Molecular Targets and Adverse Outcomes. ENVIRONMENTAL HEALTH PERSPECTIVES. National Institute of Environmental Health Sciences (NIEHS), Research Triangle Park, NC, USA, 1-47, (2015).