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Title of Journal: Ecotoxicology

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Abbravation: Ecotoxicology

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Springer US

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DOI

10.1016/0550-3213(80)90031-0

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1573-3017

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Effect of chronic exposure to two components of Tr

Authors: Sol Jang Kyunghee Ji
Publish Date: 2015/08/20
Volume: 24, Issue: 9, Pages: 1906-1914
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Abstract

Tritan™ copolyester is a novel plastic form from Eastman Company utilizing three main monomers 14cyclohexanedimethanol CHDM dimethyl terephthalate DMT and 2244tetramethyl13cyclobutanediol Despite Tritan™ has been widely applied for plastic bottles the effects of longterm exposure to these compounds have seldom been investigated We investigated chronic effects and endocrine disruption potential of CHDM and terephthalic acid TPA main mammalian metabolite formed from DMT using crustacean Daphnia magna and Moina macrocopa and freshwater fish Oryzias latipes The effects on sex hormone balance and the associated mechanisms were also investigated by use of H295R cells In chronic toxicity test D magna showed significant decrease in reproduction number of young per female after exposure to 10 mg/L TPA In early life stage exposure using O latipes significant decrease of juvenile survival and weight were observed in fish exposed to 10 mg/L and ≥1 mg/L CHDM respectively Expressions of vtg2 mRNA in fish exposed to CHDM and those of cyp19b star cyp17 and cyp19a mRNAs in fish exposed to TPA were significantly upregulated The results of H295R cell assay also showed that both chemicals at high concentrations could alter sex hormone production in steroidogenic pathway The effective concentrations of the tested compounds were several orders of magnitude greater than the concentrations can be detected in ambient waters Further in vivo and in vitro studies will be needed to investigate the effect of copolymer on endocrine disruption

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