Restoring Synaptic Balance in Schizophrenia: Insights from a thalamo-cortical conductance-based model

The dysconnectivity hypothesis of schizophrenia suggests that atypical, aberrant neural communication underlies the disorder’s diverse symptoms. Building on this framework, our study introduces a novel approach to understanding schizophrenia and exploring potential ways to adjust neural activity through synaptic restoration. Using a combination of magnetoencephalography data and dynamic causal modeling, we identified specific synaptic disturbances in schizophrenia patients, including increased NMDA receptor-mediated excitation in superficial pyramidal neurons and reduced GABA-B receptor-mediated inhibition between interneurons and pyramidal cells. These findings reveal a critical imbalance in excitation and inhibition within thalamo-cortical circuits, manifesting as altered gamma and alpha oscillations. The cornerstone of our research is an in silico synaptic restoration analysis, which demonstrates that targeted modifications to AMPA, NMDA, GABA-A, and GABA-B receptor-mediated connections can recalibrate altered neural activity in schizophrenia, aligning it with healthy control patterns. This restoration approach not only highlights the complex nature of synaptic dysfunction in the disorder but also identifies specific pathways as potential therapeutic targets, offering new avenues for investigating schizophrenia’s diverse symptomatology.