Hippocampal subfield transcriptome analysis in schizophrenia psychosis.

Molecular Psychiatry
Jessica Marie PerezCarol A Tamminga

Abstract

We have previously demonstrated functional and molecular changes in hippocampal subfields in individuals with schizophrenia (SZ) psychosis associated with hippocampal excitability. In this study, we use RNA-seq and assess global transcriptome changes in the hippocampal subfields, DG, CA3, and CA1 from individuals with SZ psychosis and controls to elucidate subfield-relevant molecular changes. We also examine changes in gene expression due to antipsychotic medication in the hippocampal subfields from our SZ ON- and OFF-antipsychotic medication cohort. We identify unique subfield-specific molecular profiles in schizophrenia postmortem samples compared with controls, implicating astrocytes in DG, immune mechanisms in CA3, and synaptic scaling in CA1. We show a unique pattern of subfield-specific effects by antipsychotic medication on gene expression levels with scant overlap of genes differentially expressed by SZ disease effect versus medication effect. These hippocampal subfield changes serve to confirm and extend our previous model of SZ and can explain the lack of full efficacy of conventional antipsychotic medication on SZ symptomatology. With future characterization using single-cell studies, the identified distinct molecula...Continue Reading

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Citations

Sep 23, 2020·NPJ Schizophrenia·Mohamed A SherifWilliam W Lytton
Mar 23, 2021·European Archives of Psychiatry and Clinical Neuroscience·Giuliana S ZuccoliDaniel Martins-de-Souza

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