Circadian time- and sleep-dependent modulation of cortical parvalbumin-positive inhibitory neurons

ABSTRACT: Parvalbumin-positive neurons (PVs) are the main class of inhibitory neurons in the mammalian central nervous system. By examining diurnal changes in synaptic and neuronal activity of PVs in the supragranular layer of the mouse primary visual cortex (V1), we found that both PV input and output are modulated in a time- and sleep-dependent manner throughout the 24-hour day. We first show that PV-evoked inhibition is stronger by the end of the light cycle (ZT12) relative to the end of the dark cycle (ZT0), which is in line with the lower inhibitory input of PV neurons at ZT12 than at ZT0. Interestingly, PV inhibitory and excitatory synaptic transmission slowly oscillate in opposite directions during the light/dark cycle. Whereas excitatory synapses are predominantly regulated by experience, in

SUBMITTER: Dr. Fang-Jiao Zong 

PROVIDER: S-SCDT-10_15252-EMBJ_2022111304 | biostudies-other |

REPOSITORIES: biostudies-other