Triclosan (TCS), an antimicrobial chemical with potential endocrine-disrupting properties, may pose a risk to early embryonic development and cellular homeostasis during adulthood. Here, we show that TCS induces toxicity in both the nematode C. elegans and human mesenchymal stem cells (hMSCs) by disrupting the SKN-1/Nrf2-mediated oxidative stress response. Specifically, TCS exposure affected C. elegans survival and hMSC proliferation in a dose-dependent manner. Cellular analysis showed that TCS inhibited the nuclear localization of SKN-1/Nrf2 and the expression of its target genes, which were associated with oxidative stress response. Notably, TCS-induced toxicity was significantly reduced by either antioxidant treatment or constitutive SKN-1/Nrf2 activation. As Nrf2 is strongly associated with aging and chemoresistance, these findings will provide a novel approach to the identification of therapeutic targets and disease treatment.
Bibliographical noteFunding Information:
We thank the members of the Lee laboratory, Jiwoo Lee and Jiah Lee (St. Peter Catholic School, Greenville, NC), and Dr. Lim (ECU), for helpful advice and discussion during this work. This work was supported in part by the Ministry of Health & Welfare, Republic of Korea (Grant No. HI14C2000) to J.W.L., NIH grants GM062891 and AG54215 to TKB, a Diabetes Research Center award (P30DK036836) to the Joslin Diabetes Center, as well as the Brody Brother’s Grant (BBE 213152), Brody Seed/Bridge Grant, and NIH (1R15GM112174-01A1) to M-H.L. Some strains were provided by the CGC, which is funded by NIH Office of Research Infrastructure Programs (P40 OD010440).
© 2017 The Author(s).
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