Cited by 336Toxic Organic Pollutants ImpactEnvironmental Toxicology and EcotoxicologyEffects and risks of endocrine disrupting chemicals

Stepping Backward to Improve Assessment of PCB Congener Toxicities

Open access
Hansen, Larry G.·1998·Environmental Health Perspectives

Abstract

Polychlorinated biphenyls (PCBs) are ubiquitous global contaminants that have been intensively investigated for three decades.They are broad-acting toxicants occurring in complex mixtures and accurate risk assessment has proven to be elusive.Focusing on a limited set of end points and emphasizing a fixed set of congeners have led to more streamlined data sets that are meant to expedite hazard characterization and risk assessment for the most potent congeners-aryl hydrocarbon receptor (AhR) agonists.Unfortunately, this has made it impossible to confirm or deny significant contributions from the more prevalent components of the mixtures.PCBs may be only coincidentally present, rather than causal, in some diseases.Still, attempts to determine associations with incomplete residue data may lead to erroneous conclusions and make accurate risk assessment even more elusive.Responses not mediated through the AhR are presented and emphasize large data gaps.Dissimilar analytical reports emphasize that selection of analytes is not consistent.Collectively, these data confirm that AhR-focused objectives unintentionally created the impression that nonplanar PCBs have little if any potential for hazards to humans and wildlife.Near steady-state exposure of healthy adults are probably of minor consequence except for emerging correlations with non-Hodgkin's lymphoma; however, pulses of exposure to more labile mixtures may contribute to developmental effects without leaving a residue record.More broadly based criteria are suggested and harmonization of data collection and presentation are desirable.A more comprehensive list of PCB congeners is proposed that would provide more adequate data upon which to base associations with adverse outcomes.-

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Crossref · 10.2307/3433919

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  • The composition or congener profile of the PCB exposure is an important determinant of the outcome on the methylome.

    “While there were significant differences in age, geographical location, and lifetime exposure levels to different PCBs between these study populations, these studies raise the possibility that the composition or congener profile of the PCB exposure is an important determinant of the outcome on the methylome [ 114 ].”

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Authors
Hansen, L. G.
Venue
Environmental Health Perspectives
Publisher
JSTOR
Published
1998-02
Volume
106
Issue
suppl 1
Pages
171
ISSN
0091-6765 (ISSN-L)
OpenAlex
W2073813648
Cited by
336
References
175
Citations by year
2026: 1 · 2025: 3 · 2024: 2 · 2023: 5 · 2022: 5 · 2021: 3 · 2020: 10 · 2019: 4 · 2018: 8 · 2017: 7 · 2016: 5 · 2015: 10 · 2014: 16 · 2013: 17 · 2012: 11
FWCI
3.32
Type
journal article
Language
en
Open access
Licence
public-domain
Locations
  • Environmental Health Perspectives (publishedVersion, public-domain)
  • Environmental Health Perspectives (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Toxic Organic Pollutants Impact
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Environmental Toxicology and Ecotoxicology
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Effects and risks of endocrine disrupting chemicals
Keywords
polychlorinated biphenyls, PCB congeners, risk assessment, aryl hydrocarbon receptor agonists, PCB mixtures, hazard characterization, non-Hodgkin lymphoma, early life exposure, data harmonization
MeSH terms
Animals, Body Burden, Cytochrome P-450 Enzyme System, Enzyme Induction, Humans, Polychlorinated Biphenyls, Thyroid Hormones, Receptors, Aryl Hydrocarbon, Risk Assessment

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