Parvalbumin interneurons mediate neuronal circuitry-neurogenesis coupling in the adult hippocampus

This study shows that neural progenitor cells in the adult hippocampus of mice receive immature GABAergic synaptic inputs from parvalbumin (PV)-expressing interneurons, and uses optogenetic stimulation to demonstrate local PV interneuron activation via GABA signaling promotes survival and maturation of newborn neurons.