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- W4380576775 abstract "Abstract The proper development and function of telencephalic GABAergic interneurons is critical for maintaining the excitation and inhibition (E/I) balance in cortical circuits. Glutamate contributes to cortical interneuron (CIN) development via N -methyl- d -aspartate receptors (NMDARs). NMDAR activation requires the binding of a co-agonist, either glycine or d -serine. d -serine (co-agonist at many mature forebrain synapses) is racemized by the neuronal enzyme serine racemase (SR) from l -serine. We utilized constitutive SR knockout (SR −/− ) mice to investigate the effect of d -serine availability on the development of CINs and inhibitory synapses in the prelimbic cortex (PrL). We found that most immature Lhx6 + CINs expressed SR and the obligatory NMDAR subunit NR1. At embryonic day 15, SR −/− mice had an accumulation of GABA and increased mitotic proliferation in the ganglionic eminence and fewer Gad1 + (glutamic acid decarboxylase 67 kDa; GAD67) cells in the E18 neocortex. Lhx6 + cells develop into parvalbumin (PV+) and somatostatin (Sst+) CINs. In the PrL of postnatal day (PND) 16 SR −/− mice, there was a significant decrease in GAD67+ and PV+, but not SST + CIN density, which was associated with reduced inhibitory postsynaptic potentials in layer 2/3 pyramidal neurons. These results demonstrate that D-serine availability is essential for prenatal CIN development and postnatal cortical circuit maturation." @default.
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- W4380576775 date "2023-06-13" @default.
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- W4380576775 title "d-serine availability modulates prefrontal cortex inhibitory interneuron development and circuit maturation" @default.
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- W4380576775 doi "https://doi.org/10.1038/s41598-023-35615-5" @default.
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