Abstract
Dibutyl phthalate (DBP), a persistent environmental pollutant, can induce neural tube abnormal development in animals. The possible effects of DBP exposure on human neural tube defects (NTDs) remain elusive. In this study, the distribution of DBP in the body fluid of human NTDs was detected by GC-MS. Then, chick embryos were used to investigate the effects of DBP on early embryonic development. Oxidative stress indicators in chick embryos and the body fluid of human NTDs were detected by ELISA. The cell apoptosis and total reactive oxygen species (ROS) level in chick embryos were detected by whole-mount TUNEL and oxidized DCFDA, respectively. The study found that the detection ratio of positive DBP and its metabolites in maternal urine was higher in the NTD population than that in normal controls. 8-hydroxy-2 deoxyguanosine (8-OHDG) and malondialdehyde (MDA) were evidently upregulated and superoxide dismutase (SOD) was observably downregulated in amniotic fluid and urine. Animal experiments indicated that DBP treatment induced developmental toxicity in chick embryos by enhancing the levels of oxidative stress and cell apoptosis. MDA was increased and SOD was decreased in DBP-treated embryos. Interestingly, the supplement of high-dose choline (100 μg/μL), not folic acid, could partially restore the teratogenic effects of DBP. Our data collectively suggest that the incidence of NTDs is closely associated with DBP exposure. This study may provide new insight for NTD prevention.
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Funding
This work was financially supported by grants from The National Key Research and Development Program of China (2016YFC1000307), CAMS Innovation Fund for Medical Sciences (CIFMS, 2018-I2M-1-004), and the Open Grant from Chongqing Key Laboratory of Birth Defects and Reproductive Health (No. 1111).
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Highlights
• The incidence of NTDs is closely associated with DBP exposure
• DBP exposure disturbs neural tube development by strengthening oxidative stress
• The supplementary of high dose choline could partially restore the teratogenic effects of DBP
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Wang, R., Sun, DG., Song, G. et al. Choline, not folate, can attenuate the teratogenic effects ofdibutyl phthalate (DBP) during early chick embryo development. Environ Sci Pollut Res 26, 29763–29779 (2019). https://doi.org/10.1007/s11356-019-06087-w
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DOI: https://doi.org/10.1007/s11356-019-06087-w