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[The screening of potential biological markers of seizure onset zone in focal cortical dysplasia based on bioinformatics analysis].

Three patients diagnosed with focal cortical dysplasia (FCD) in the First Hospital of Peking University from September to November 2020 were recruited in the study. Based on stereotactic electroencephalogram (SEEG) or electrocorticogram (ECoG) analysis to localize the seizure onset zone (SOZ), RNA sequencing (RNA-seq) analysis was performed for the SOZ and para-SOZ tissue obtained from surgery. The differentially expressed genes between SOZ and para-SOZ samples were analyzed by performing Go (Gene ontology) analysis and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analysis."Extracellular matrix"was significantly enriched, which included collagen synthesis genes (e.g., COL1A1)."Ether lipid metabolism"was enriched in the KEGG pathway enrichment analysis. These differences could be the potential biological markers for SOZ localization.