Cortical regulation of neurogenesis and cell proliferation in the ventral subventricular zone

Abstract

Neurogenesis and differentiation of neural stem cells (NSCs) are controlled by cell-intrinsic molecular pathways that interact with extrinsic signaling cues. In this study, we identify a circuit that regulates neurogenesis and cell proliferation in the lateral ventricle-subventricular zone (LV-SVZ). Our results demonstrate that direct glutamatergic projections from the anterior cingulate cortex (ACC), as well as inhibitory projections from calretinin⁺ local interneurons, modulate the activity of cholinergic neurons in the subependymal zone (subep-ChAT⁺). Furthermore, in vivo optogenetic stimulation and inhibition of the ACC-subep-ChAT⁺ circuit are sufficient to control neurogenesis in the ventral SVZ. Both subep-ChAT⁺ and local calretinin⁺ neurons play critical roles in regulating ventral SVZ neurogenesis and LV-SVZ cell proliferation.

Keywords: CP: Neuroscience; anterior cingulate; calretinin; frontal cortex; neural stem cells proliferation; postnatal neurogenesis; subep-ChAT(+); subventricular zone.