Add time:08/14/2019 Source:sciencedirect.com
[Objective]Di(2-ethylhexyl) phthalate (DEHP), a widely used plasticizer, may act as an endocrine disruptor and cause developmental toxicity. Differentiated human embryonic stem cells (hESCs) were used to investigate the underlying mechanism of the embryotoxicity induced by DEHP.[Materials and Methods] H9-hESCs were treated with DEHP at different concentrations for 10 days, and the cytotoxicity of DEHP on cell proliferation was determined using a cell-microelectronic sensing technique (Real-Time Cellular Analysis: RTCA). Based on the 50% inhibitory proliferation concentration (IC50), differentiated H9-hESCs were treated with DEHP at 0, 50, 100, and 200 μg/ml for 120 h, followed by measurement of its toxic effects on the transcriptome by mRNA microarray and QuantiGene Plex (QGP). Proteins were detected by the iTRAQ-based proteomics method and the proteins related to the PPARγ/PTEN/Akt pathways were measured by western blotting. The progression of the cell cycle and apoptosis were characterized using flow cytometry (FCM). In other experiments, hESCs were pre-treated with GW9662 (20 μM), a specific PPARγ inhibitor, for 30 min, followed by exposure to GW9662 (20 μM) and DEHP (200 μg/ml) for 120 h to observe the underlying mechanism of DEHP's embryotoxicity.
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