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- W2943477488 abstract "We have recently shown in rats that adolescent cocaine exposure induces prolonged modifications on synapses in medial prefrontal cortex (mPFC), which might contribute to long-term behavioral outcomes in adulthood. In this study, we further investigated the molecular mechanisms underlying adolescent cocaine exposure-related psychiatric problems in adulthood, especially focusing on the alterations of GABAergic transmission in prelimbic cortex (PrL), 1 subregion of mPFC. Consistent with a previous study, adolescent cocaine-exposed mice exhibited enhanced anxiety-like behaviors in their adulthood. In the same mice models, depression-like behaviors increased as well, but the conditioned place preference formed normally. In parallel, activities of pyramidal neurons at layer V of PrL were reduced after adolescent cocaine exposure, accompanied by an increase in the percentage of symmetric synapses in PrL of adult mice. Additionally, miniature inhibitory postsynaptic currents rather than miniature excitatory postsynaptic currents were increased on these pyramidal neurons, and increased levels of GABA were found in adult PrL. The molecules in the GABAergic system in adult PrL were also changed by adolescent cocaine use, as indicated by increased glutamate decarboxylase 67kDa, GAB AA-αl, and decreased GABA transporter 1. In the same mice, some regulators to GABAergic transmission such as neuregulin l/ErbB4 signals were heightened as well. Collectively, these findings revealed that adolescent cocaine exposure results in permanent enhancement of GABAergic transmission on pyramidal neurons in PrL, which subsequently attenuate the activities of these neurons and ultimately contributes to the development of psychiatric disorders in later life.—Shi, P., Nie, J., Liu, H., Li, Y., Lu, X., Shen, X., Ge, F., Yuan, T.-F., Guan, X. Adolescent cocaine exposure enhances the GABAergic transmission in the prelimbic cortex of adult mice. FASEB J. 33, 8614–8622 (2019). www.fasebj.org" @default.
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- W2943477488 date "2019-04-29" @default.
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- W2943477488 title "Adolescent cocaine exposure enhances the GABAergic transmission in the prelimbic cortex of adult mice" @default.
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- W2943477488 doi "https://doi.org/10.1096/fj.201802192rr" @default.
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