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Records 51 to 75 of 3150

Simulating patterns of life: More representative time-activity patterns that account for context
(JOURNAL) [Published : Jan 16, 2023]
Background: Complex contributions of environment to health are intimately connected to human behavior. Modeling of human behaviors helps inform important policy decisions related to critical environmental and public health challenges. There are many approaches to human behavior m...
EPA Children's Environmental Health Research Centers
(PRESENTATION) [Presented : Mar 20, 2024]
This is a short presentation to the Subcommittee on Chemical Exposures of the President's Task Force on Environmental Health Risks and Safety Risks to Children. The presentation briefly touches on the STAR program history of ORD funding for Children's Centers, and discusses our c...
Evaluating two analysis methods for the microelectrode array network formation assay
(PRESENTATION) [Presented : Mar 14, 2024]
Background: In vitro new approach methods (NAMs) have been developed for evaluating developmental neurotoxicity (DNT) potential. One such DNT NAM, the Network Formation Assay (NFA), uses a twelve-day exposure model to measure neuronal network activity changes in primary rat corti...
Exploring maternal and developmental toxicity of PFO4DA and PFO5DoA using hepatic transcriptomics and serum metabolomics presentation
(PRESENTATION) [Presented : Mar 22, 2024]
These data were recently presented at SOT 2024 as a poster, and this sub-product will present the same data and analyses in a presentation at a local society meeting of endocrine disrupting chemicals NC (EDC-NC). Sprague-Dawley rat dams were exposed via oral gavage from GD18-22 t...
US EPA’s Report on the Environment (ROE)--Overview and Website demonstration
(PRESENTATION) [Presented : Apr 04, 2024]
EPA’s Report on the Environment (ROE) brings together the most reliable and readily available indicators to create a comprehensive view of the nation’s environmental and human health status and trends. The indicators provide an objective basis for Agency decision maki...
High-throughput Identification of Androgen Disrupting ToxCast Chemicals and CYP450 Metabolites
(PRESENTATION) [Presented : Mar 14, 2024]
Background and Purpose The identification of chemicals with the potential to disrupt androgen signaling is a key component of the EPA’s Endocrine Disruption Screening Program (EDSP). EPA researchers have worked to devise in vitro assays and computational models to serve as ...
Residential greenness, asthma, and lung function among children at high risk of allergic sensitization: a prospective cohort study
(JOURNAL) [Published : May 12, 2022]
Background: While benefits of greenness to health have been reported, findings specific to child respiratory health are inconsistent. Methods: We utilized a prospective birth cohort followed from birth to age 7 years (n = 617). Residential surrounding greenness was quan...
Alunite Supergroup Mineral Formation in Soil Decreases Lead and Arsenic Bioavailability: A Path Towards Concomitant Remediation
(PRESENTATION) [Presented : Mar 21, 2024]
Lead (Pb) and arsenic (As) contamination of soils is widespread in the United States and is an important source of exposure in young children. Early life exposure to metal(loid) contaminants has serious and long-lasting effects on health, making mitigation a critical public healt...
A Unified Probabilistic Framework for Dose-Response Assessment of Human Health Effects
(JOURNAL) [Published : Dec 01, 2015]
Background.  When chemical health hazards have been identified, probabilistic dose–response assessment (“hazard characterization”) quantifies uncertainty and/or variability in toxicity as a function of human exposure. Existing probabilistic approaches diffe...
Suspect Screening Analysis of Pooled Human Serum Samples Using GC × GC/TOF-MS
(JOURNAL) [Published : Jan 30, 2024]
Humans interact with thousands of chemicals. This study aims to identify substances of emerging concern and in need of human health risk evaluations. Sixteen pooled human serum samples were constructed from 25 individual samples each from the National Institute of Environmental H...
Advancing the Use and Acceptance of the Human Thyroid Microtissue Assay
(PRESENTATION) [Presented : Mar 14, 2024]
This is a presentation abstract for proposed session, ID 141, Advances in New Approach Methods for Thyroid Toxicity Testing, for the SOT 2024 Annual Meeting.  Abstract: There is significant regulatory need to evaluate chemicals that may disrupt the thyroid endocrine system. ...
Microglial Dynamics, Blood-Brain Barrier Morphogenesis, and Developmental Toxicity: a brief review and computational model
(JOURNAL) [Published : Dec 01, 2023]
Morphogenesis of the blood-brain barrier (BBB) is a complex process linked to neovascularization of the embryonic neural tube. This selective transport interface forms between vascular-neural compartments during organogenesis and dysregulation has be...
A tool to assess risk of bias in non-randomized follow-up studies of exposure effects (ROBINS-E)
(JOURNAL) [Published : Mar 24, 2024]
Background: Observational epidemiologic studies provide critical data for the evaluation of the potential effects of environmental, occupational and behavioural exposures on human health. Systematic reviews of these studies play a key role in informing policy and practice. System...
Supporting FAIR Chemical Assessments
(PRESENTATION) [Presented : Mar 27, 2022]
To make a dataset FAIR, it is imperative that data sets are internally consistent, nonredundant, unambiguous, and accessible. An example of making FAIR data is provided by the US EPA Integrated Risk Information System (IRIS) Program’s inclusion of the Environmental Health V...
Comparing rat and rabbit embryo-fetal developmental toxicity data for 379 pharmaceuticals: on systemic dose and developmental effects
(JOURNAL) [Published : May 01, 2017]
A database of embryo-fetal developmental toxicity (EFDT) studies of 379 pharmaceutical compounds in rat and rabbit was analyzed for species differences based on toxicokinetic parameters of area under the curve (AUC) and maximum concentration (Cmax) at the developmental adverse ef...
Evaluation of Estrogenic Effects of PFAS in Rats in the Rodent Uterotrophic Assay
(PRESENTATION) [Presented : Mar 22, 2023]
Per and polyfluoroalkyl substances (PFAS) are a large class of fluorinated organic chemicals of interest to regulatory agencies due to their prevalence and persistence in the environment. Multiple PFAS have been identified as endocrine disrupting chemicals due to estrogen recepto...
Metabolomic and multi-tissue transcriptomic analysis reveals complex phenotypic interactions of eight-week social isolation and acute ozone exposure in rats
(PRESENTATION) [Presented : Mar 22, 2022]
Socially isolated individuals and communities often face psychosocial stressors in combination with exposure to high levels of air pollutants. Social isolation (SI) has been considered a risk factor for neuropsychiatric conditions and is also linked to increased metabolic disorde...
Developmental toxicity of emerging perfluoroalkyl ether carboxylic acids of varying chain length: PFMOAA, PFO4DA and PFO5DoA
(PRESENTATION) [Presented : Jun 26, 2022]
Multiple per- and polyfluoroalkyl ether acids have recently been detected in drinking water and/or human serum, but there is a paucity of data on potential toxicity despite known exposure.  Perfluoro-2-methoxyacetic acid (PFMOAA) is a short chain ether carboxylate (3 carbons...
Deiodinase metabolism of thyroid hormones as measured by LC-MS/MS is altered by exposure to iopanoic acid in a rodent model
(PRESENTATION) [Presented : Mar 12, 2024]
Thyroid hormones (TH) are highly iodinated molecules that regulate many aspects of mammalian physiology and are essential for normal growth and development. Deiodinases (DIO) are a family of three metabolizing enzymes (DIO1, DIO2, DIO3) by activating or deactivating TH action. Th...
Geographic and demographic variability in serum PFAS concentrations for pregnant women in the United States
(JOURNAL) [Published : Jan 25, 2023]
BACKGROUND. While major pathways of human PFAS exposure are thought to be drinking water and diet, other pathways and sources have also been shown to contribute to a person’s cumulative exposure. However, the degree of contribution of these other sources to PFAS body burdens is s...
Maternal, fetal, and neonatal toxicity of the long-chain, multi-ether PFAS PFO5DoA in the Sprague-Dawley rat
(PRESENTATION) [Presented : Mar 13, 2024]
Abstract reduced to fit RAPID character limits - full abstract attached Background and Purpose Recent human and ecological biomonitoring studies in the US and China have identified novel perfluoroalkyl carboxylic acids with ether linkages between each fluorinated carbon in a homo...
Proteome profiling of rat brain cerebellum during the early postnatal brain development
(PRESENTATION) [Presented : Mar 12, 2024]
Background and Purpose: During the sensitive perinatal period, environmental stressors are a threat to brain development. We applied proteomics to investigate the protein changes occurring during the early postnatal rat cerebellum development. Methods: High-resolution mass spect...
Dose addition-based approaches accurately predict maternal and neonatal effects in Sprague-Dawley rats from three different PFAS mixtures studies
(PRESENTATION) [Presented : Mar 22, 2023]
Due to the pervasive detection of multiple PFAS in human and environmental matrices, many health-based agencies are employing or pursuing cumulative assessment and regulatory approaches.  However, the literature is lacking mammalian in vivo studies that test additivity by co...
Early Gestational Ozone Exposure Impairs Lung Vascular and Alveolar Development in Peri-adolescent Female Rats: Potential Linkage to Later Life Lung Disease
(PRESENTATION) [Presented : Feb 20, 2024]
RATIONALE  Air pollution exposure in pregnancy may affect fetal growth, and fetal growth restriction (FGR) is associ­ated with lung im­pairment that can persist into adulthood. Associated diseases include asthma, pulmonary hypertension (PH), and chronic obstructive p...
Pathway analysis of developmental rat cerebellar and cortical proteomes following perinatal agonism of GABA-gated chloride channels
(PRESENTATION) [Presented : Mar 13, 2024]
The period of neurodevelopment is vulnerable to various insults, including those produced by environmental compounds. We have previously observed behavioral alterations (uncoordinated hindlimb gait, decreased startle response, altered motor activity ontogeny) following perinatal ...