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- W2004019931 abstract "Although Cadmium (Cd) is a well-known heavy metal pollutant and teratogen, the mechanism behind Cd-mediated teratogenicity remains unknown. Previously, we have reported of the protective role of Nitric oxide (NO), a key signaling molecule in the embryonic developmental process, against Thalidomide-induced teratogenicity. The objective of this study was to obtain a mechanistic in-sight of the antiteratogenic potential of NO against Cd-mediated teratogenicity. To achieve this goal, we first studied the effect of Cd on the vasculature of developing embryos and then we investigated whether Cd mediated its effects by interfering with the redox regulation of NO signaling in the early development milieu. We used a chick embryonic model to determine the time and dose-dependent effects of Cd and NO recovery against Cd assault. The effects of Cd and NO recovery were assessed using various angiogenic assays. Redox and NO levels were also measured. Results demonstrated that exposure to Cd at early stage of development caused multiple birth defects in the chick embryos. Exposure to Cd suppressed endogenous NO levels and cGMP signaling, inhibiting angioblast activation and subsequently impairing yolk sac vascular development. Furthermore, Cd-induced superoxide and lipid peroxidation mediated activation of proapoptotic markers p21 and p53 in the developing embryo. Cd also caused the down-regulation of FOXO1, and up-regulation of FOXO3a and Caspase 3-mediated apoptosis. Addition of exogenous NO through a NO donor was able to blunt Cd-mediated effects and restore normal vascular and embryonic development. In conclusion, Cd-mediated teratogenicity occurs as a result of impaired NO-cGMP signaling, increased oxidative stress, and the activation of apoptotic pathways. Subsequent addition of exogenous NO through NO donor negated Cd-mediated effects and protected the developing embryo." @default.
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- W2004019931 date "2014-12-08" @default.
- W2004019931 modified "2023-09-27" @default.
- W2004019931 title "Cadmium-Induced Embryopathy: Nitric Oxide Rescues Teratogenic Effects of Cadmium" @default.
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- W2004019931 doi "https://doi.org/10.1093/toxsci/kfu258" @default.
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- W2004019931 hasPublicationYear "2014" @default.
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