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- W3217381687 abstract "Folic acid (FA) supplementation in early pregnancy is recommended to protect against birth defects. But excess FA has exhibited neurodevelopmental toxicity. We previously reported that the mice treated with 2.5-fold the dietary requirement of FA one week before mating and throughout pregnancy and lactation displayed abnormal behaviors in the offspring. Here we found the levels of non-phosphorylated β-catenin (active) were increased in the brains of weaning and adult FA-exposed offspring. Meanwhile, demethylation of protein phosphatase 2 A catalytic subunit (PP2Ac), which suppresses its enzyme activity in regulatory subunit dependent manner, was significantly inhibited. Among the upstream regulators of β-catenin, PI3K/Akt/GSK-3β but not Wnt signaling was stimulated in FA-exposed brains only at weaning. In mouse neuroblastoma N2a cells, knockdown of PP2Ac or leucine carboxyl methyltransferase-1 (LCMT-1), or overexpression of PP2Ac methylation-deficient mutant decreased β-catenin dephosphorylation. These results suggest that excess FA may activate β-catenin via suppressing PP2Ac demethylation, providing a novel mechanism for the influence of FA on neurodevelopment." @default.
- W3217381687 created "2021-12-06" @default.
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- W3217381687 date "2022-01-01" @default.
- W3217381687 modified "2023-09-26" @default.
- W3217381687 title "Excess folic acid supplementation before and during pregnancy and lactation activates β-catenin in the brain of male mouse offspring" @default.
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- W3217381687 doi "https://doi.org/10.1016/j.brainresbull.2021.11.008" @default.
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