Cited by 190Microplastics and Plastic PollutionEnvironmental Toxicology and EcotoxicologyPharmaceutical and Antibiotic Environmental Impacts

Assessment of microplastic-sorbed contaminant bioavailability through analysis of biomarker gene expression in larval zebrafish

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Sleight, Victoria A., Bakir, Adil, Thompson, Richard C., Henry, Theodore B.·2017·Marine Pollution Bulletin

Abstract

Microplastics (MPs) are prevalent in marine ecosystems. Because toxicants (termed here “co-contaminants”) can sorb to MPs, there is potential for MPs to alter co-contaminant bioavailability. Our objective was to demonstrate sorption of two co-contaminants with different physicochemistries [phenanthrene (Phe), log10Kow = 4.57; and 17α-ethinylestradiol (EE2), log10Kow = 3.67] to MPs; and assess whether co-contaminant bioavailability was increased after MP settlement. Bioavailability was indicated by gene expression in larval zebrafish. Both Phe and EE2 sorbed to MPs, which reduced bioavailability by a maximum of 33% and 48% respectively. Sorption occurred, but was not consistent with predictions based on co-contaminant physicochemistry (Phe having higher log10Kow was expected to have higher sorption). Contaminated MPs settled to the bottom of the exposures did not lead to increased bioavailability of Phe or EE2. Phe was 48% more bioavailable than predicted by a linear sorption model, organism-based measurements therefore contribute unique insight into MP co-contaminant bioavailability.

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Authors
Sleight, V. A., Bakir, A., Thompson, R. C., & Henry, T. B.
Affiliations
  • British Antarctic Survey (GB)
  • University of Portsmouth (GB)
  • University of Plymouth (GB)
Corresponding author
Sleight, Victoria A.
Venue
Marine Pollution Bulletin
Publisher
Elsevier BV
Published
2017-03
Volume
116
Issue
1-2
Pages
291-297
ISSN
0025-326X (ISSN-L)
OpenAlex
W2579412410
Cited by
190
References
49
Citations by year
2026: 7 · 2025: 7 · 2024: 13 · 2023: 26 · 2022: 34 · 2021: 32 · 2020: 32 · 2019: 21 · 2018: 15 · 2017: 3
FWCI
8.74
Type
journal article
Language
en
Open access
Locations
  • Marine Pollution Bulletin (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • NERC Open Research Archive (Natural Environment Research Council) (acceptedVersion)
  • Aberdeen University Research Archive (Aberdeen University) (submittedVersion)
  • PEARL (University of Plymouth) (submittedVersion)
Funders
Natural Environment Research Council (NE/N006526/1, bas0100036)
Topics
  • Physical Sciences › Environmental Science › Pollution › Microplastics and Plastic Pollution
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Environmental Toxicology and Ecotoxicology
  • Physical Sciences › Environmental Science › Pollution › Pharmaceutical and Antibiotic Environmental Impacts
Keywords
microplastics, co-contaminants, contaminant sorption, bioavailability, phenanthrene, ethinyl estradiol, zebrafish larvae, gene expression biomarkers, octanol-water partition coefficient, marine pollution
MeSH terms
Animals, Biological Availability, Ethinyl Estradiol, Larva, Phenanthrenes, Plastics, Water Pollutants, Chemical, Zebrafish, Biomarkers, Gene Expression

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