INVESTIGADORES
BELFORTE Juan Emilio
artículos
Título:
Early NMDA receptor ablation in interneurons causes an activity-dependent E/I imbalance in vivo in prefrontal cortex pyramidal neurons of a mouse model useful for the study of schizophrenia
Autor/es:
PAFUNDO, DIEGO ESTEBAN; PRETELL ANNAN, CARLOS A; FULGINITI N; BELFORTE JE
Revista:
SCHIZOPHRENIA BULLETIN
Editorial:
OXFORD UNIV PRESS
Referencias:
Lugar: Oxford; Año: 2021
ISSN:
0586-7614
Resumen:
Altered Excitatory/Inhibitory (E/I) balance of cortical synaptic inputs has been proposed as a central pathophysiological factor for psychiatric neurodevelopmental disorders including schizophrenia. However, direct measurement of E/I synaptic balance have not been assessed in vivo for any validated schizophrenia animal model. Using a mouse model useful for the study of schizophrenia we show that a selective ablation of NMDA receptors (NMDAr) in cortical and hippocampal interneurons during early postnatal development results in an E/I imbalance in vivo, with synaptic inputs to pyramidal neurons shifted towards excitation in the adult mutant medial prefrontal cortex (mPFC). Remarkably, this imbalance depends on the cortical state, only emerging when theta and gamma oscillations are predominant in the network. Additional brain slice recordings and subsequent 3D morphological reconstruction showed that E/I imbalance emerges after adolescence concomitantly with significant dendritic retraction and dendritic spine re-localization in pyramidal neurons. Therefore, early postnatal ablation of NMDAr in cortical and hippocampal interneurons developmentally impacts on E/I imbalance in vivo in an activity-dependent manner.