Amelia Stanco, Ramón Pla, Daniel Vogt, Yiran Chen, Shyamali Mandal, Jamie Walker, Robert F Hunt, Susan Lindtner, Carolyn A Erdman, Andrew A Pieper, Steven P Hamilton, Duan Xu, Scott C Baraban, John L R Rubenstein
Little is known about genetic mechanisms that regulate the ratio of cortical excitatory and inhibitory neurons. We show that NPAS1 and NPAS3 transcription factors (TFs) are expressed in progenitor domains of the mouse basal ganglia (subpallium, MGE, and CGE). NPAS1(-/-) mutants had increased proliferation, ERK signaling, and expression of Arx in the MGE and CGE. NPAS1(-/-) mutants also had increased neocortical inhibition (sIPSC and mIPSC) and generated an excess of somatostatin(+) (SST) (MGE-derived) and vasoactive intestinal polypeptide(+) (VIP) (CGE-derived) neocortical interneurons, but had a normal density of parvalbumin(+) (PV) (MGE-derived) interneurons...
December 3, 2014: Neuron