Critical review of styrene genotoxicity focused on the mutagenicity/clastogenicity literature and using current organization of economic cooperation and development guidance

Environmental and Molecular Mutagenesis
M M MooreTamara House-Knight

Abstract

Styrene is an important high production volume chemical used to manufacture polymeric products. In 2018, International Agency for Research on Cancer classified styrene as probably carcinogenic to humans; National Toxicology Program lists styrene as reasonably anticipated to be a human carcinogen. The genotoxicity literature for styrene and its primary metabolite, styrene 7,8-oxide (SO), begins in the 1970s. Organization of Economic Cooperation and Development (OECD) recently updated most genotoxicity test guidelines, making substantial new recommendations for assay conduct and data evaluation for the standard mutagenicity/clastogenicity assays. Thus, a critical review of the in vitro and in vivo rodent mutagenicity/clastogenicity studies for styrene and SO, based on the latest OECD recommendations, is timely. This critical review considered whether a study was optimally designed, conducted, and interpreted and provides a critical assessment of the evidence for the mutagenicity/clastogenicity of styrene/SO. Information on the ability of styrene/SO to induce other types of genotoxicity endpoints is summarized but not critically reviewed. We conclude that when styrene is metabolized to SO, it can form DNA adducts, and positive in ...Continue Reading

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Citations

Jul 10, 2019·Journal of Toxicology and Environmental Health. Part B, Critical Reviews·M I BantonS S Sarang
Oct 7, 2020·Critical Reviews in Toxicology·Robyn L PrueittJulie E Goodman
Feb 9, 2021·Mutation Research. Genetic Toxicology and Environmental Mutagenesis·James J Collins, Martha Moore
Nov 20, 2020·Nutrients·Morteza SarparastKin Sing Stephen Lee
Nov 3, 2020·EFSA Journal·UNKNOWN EFSA Panel on Food Contact Materials, Enzymes and Processing Aids (CEP)Gilles Rivière

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Methods Mentioned

BETA
Assay
flow cytometry

Software Mentioned

Comet Assay IV

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