Reference: Goh CJH, et al. (2022) Diethyl phthalate (DEP) perturbs nitrogen metabolism in Saccharomyces cerevisiae. Sci Rep 12(1):10237

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Abstract


Phthalates are ubiquitously used as plasticizers in various consumer care products. Diethyl phthalate (DEP), one of the main phthalates, elicits developmental and reproductive toxicities but the underlying mechanisms are not fully understood. Chemogenomic profiling of DEP in S. cerevisiae revealed that two transcription factors Stp1 and Dal81 involved in the Ssy1-Ptr5-Ssy5 (SPS) amino acid-sensing pathway provide resistance to DEP. Growth inhibition of yeast cells by DEP was stronger in poor nitrogen medium in comparison to nitrogen-rich medium. Addition of amino acids to nitrogen-poor medium suppressed DEP toxicity. Catabolism of amino acids via the Ehrlich pathway is required for suppressing DEP toxicity. Targeted metabolite analyses showed that DEP treatment alters the amino acid profile of yeast cells. We propose that DEP inhibits the growth of yeast cells by affecting nitrogen metabolism and discuss the implications of our findings on DEP-mediated toxic effects in humans.

Reference Type
Journal Article | Research Support, Non-U.S. Gov't
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Goh CJH, Cui L, Wong JH, Lewis J, Goh M, Kong KW, Yang LK, Alfatah M, Kanagasundaram Y, Hoon S, ... Show all
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