Sensory Integration in Mouse Insular Cortex Reflects GABA Circuit Maturation

Nadine Gogolla, Anne E. Takesian, Guoping Feng, Michela Fagiolini, Takao K. Hensch
2014 Neuron  
Insular cortex (IC) contributes to a variety of complex brain functions, such as communication, social behavior, and self-awareness through the integration of sensory, emotional, and cognitive content. How the IC acquires its integrative properties remains unexplored. We compared the emergence of multisensory integration (MSI) in the IC of behaviorally distinct mouse strains. While adult C57BL/6 mice exhibited robust MSI, this capacity was impaired in the inbred BTBR T+tf/J mouse model of
more » ... thic autism. The deficit reflected weakened g-aminobutyric acid (GABA) circuits and compromised postnatal pruning of cross-modal input. Transient pharmacological enhancement by diazepam in BTBR mice during an early sensitive period rescued inhibition and integration in the adult IC. Moreover, impaired MSI was common across three other monogenic models (GAD65, Shank3, and Mecp2 knockout mice) displaying behavioral phenotypes and parvalbumin-circuit abnormalities. Our findings offer developmental insight into a key neural circuit relevant to neuropsychiatric conditions like schizophrenia and autism. Neuron Sensory Integration in Mouse Insular Cortex Neuron 83, 894-905, August 20, 2014 ª2014 Elsevier Inc. 895
doi:10.1016/j.neuron.2014.06.033 pmid:25088363 pmcid:PMC4177076 fatcat:zd3k4ld3knandgktiozafnquom