title: Workshop overview: arsenic research and risk assessment.
abstract: The chronic exposure of humans through consumption of high levels of inorganic arsenic (iAs)-contaminated drinking water is associated with skin lesions, peripheral vascular disease, hypertension, and cancers. Additionally, humans are exposed to organic arsenicals when used as pesticides and herbicides (e.g., monomethylarsonic acid, dimethylarsinic acid (DMA(V)) also known as cacodylic acid). Extensive research has been conducted to characterize the adverse health effects that result from exposure to iAs and its metabolites to describe the biological pathway(s) that lead to adverse health effects. To further this effort, on May 31, 2006, the United States Environmental Protection Agency (USEPA) sponsored a meeting entitled "Workshop on Arsenic Research and Risk Assessment". The invited participants from government agencies, academia, independent research organizations and consultants were asked to present their current research. The overall focus of these research efforts has been to determine the potential human health risks due to environmental exposures to arsenicals. Pursuant in these efforts is the elucidation of a mode of action for arsenicals. This paper provides a brief overview of the workshop goals, regulatory context for arsenical research, mode of action (MOA) analysis in human health risk assessment, and the application of MOA analysis for iAs and DMA(V). Subsequent papers within this issue will present the research discussed at the workshop, ensuing discussions, and conclusions of the workshop.
authors.affiliation: Integrated Risk Information System Program, National Center for Environmental Assessment, MC: B-243 01, Office of Research and Development, United States Environmental Protection Agency, Research Triangle Park, NC 27711, USA. sams.reeder@epa.gov
authors.forename: Reeder
authors.initials: R
authors.lastname: Sams
authors.forename: Douglas C
authors.initials: DC
authors.lastname: Wolf
authors.forename: Santhini
authors.initials: S
authors.lastname: Ramasamy
authors.forename: Ed
authors.initials: E
authors.lastname: Ohanian
authors.forename: Jonathan
authors.initials: J
authors.lastname: Chen
authors.forename: Anna
authors.initials: A
authors.lastname: Lowit
mesh_terms: D001151:Arsenic / Q000032:analysis / Q000378:metabolism / Q000633:toxicity*; D020261:Arsenic Poisoning / Q000453:epidemiology*; D001152:Arsenicals / Q000032:analysis / Q000737:chemistry; D006801:Humans; D009369:Neoplasms / Q000473:pathology; D018570:Risk Assessment; D014881:Water Supply
chemical_list: D001152:Arsenicals; D001151:Arsenic