Insulin-like growth factor reduced against decabromodiphenyl ether-209–induced neurodevelopmental toxicity in vivo and in vitro. (December 2021)

• Record Type: Journal Article
• Authors: Yang, Yuanxiang; He, Qianyun; Zhang, Zhengyu; Qi, Chunli; Ding, Lina; Yuan, Tingting; Chen, Yanhong; Li, Zhihua
• Is Part Of: Human & experimental toxicology. Volume 40(2021)Supplement 12
• Page Start: S475
• Page End: S486
• Publication Date: 2021-12
• Subjects: insulin-like growth factor-1 -- decabromodiphenyl ether -- neurotoxicity -- hippocampal neural cells; Toxicology -- Periodicals; 615.9
• DOI: 10.1177/09603271211045959
• Languages: English
• ISSNs: 0960-3271

Abstract

Objective: How to reduce the neurodevelopmental toxicity of decabromodiphenyl ether( PBDE-209) remains unclear. This study investigated neurodevelopmental toxicity of PBDE-209 and the protective effects of insulin-like growth factor-1 (IGF-1) Methods: Pregnant Sprague–Dawley rats were treated with PBDE-209 and IGF-1, and the offspring were subjected to the Morris Water Maze test. Hippocampal neurons were cultured with PBDE-209 and IGF-1 or the PI3K inhibitor or MEK inhibitor for cell viability, apoptosis, immunofluorescence, and Western blot assays. Results: Prenatal PBDE-209 exposure impaired the learning and memory ability of rats by delaying the mean latency to the platform compared, whereas prenatal treatment with IGF-1 treatment improved the learning and memory ability. In vitro, treatment of primary cultured hippocampal neural stem cells (H-NSCs) with PBDE-209 reduced cell proliferation and differentiation, but induced apoptosis. In contrast, IGF-1 treatment antagonized the cytotoxic effects of PBDE-209 in H-NSCs in vitro. At the gene level, IGF-1 inhibition of PBDE-209–induced cell cytotoxicity was through the activation of the PI3K/AKT and MEK/ERK signaling pathways in vitro because the effect of IGF-1 was blocked by the AKT inhibitor LY294002 and the ERK1/2 inhibitor PD98059. Conclusion: Prenatal PBDE-209 exposure impaired the learning and memory ability of rats, whereas IGF-1 treatment was able to inhibit the neurodevelopmental toxicity of PBDE-209 by activation of the PI3K/AKT and ERK1/2 cell pathways.