Effects of febrile seizures in mesial temporal lobe epilepsy with hippocampal sclerosis on gene expression using bioinfo
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Li et al. Acta Epileptologica (2020) 2:20 https://doi.org/10.1186/s42494-020-00027-9
RESEARCH
Open Access
Effects of febrile seizures in mesial temporal lobe epilepsy with hippocampal sclerosis on gene expression using bioinformatical analysis Yinchao Li, Chengzhe Wang, Peiling Wang, Xi Li and Liemin Zhou*
Abstract Background: To investigate the effect of long-term febrile convulsions on gene expression in mesial temporal lobe epilepsy with hippocampal sclerosis (MTLE-HS) and explore the molecular mechanism of MTLE-HS. Methods: Microarray data of MTLE-HS were obtained from the Gene Expression Omnibus database. Differentially expressed genes (DEGs) between MTLE-HS with and without febrile seizure history were screened by the GEO2R software. Pathway enrichment and gene ontology of the DEGs were analyzed using the DAVID online database and FunRich software. Protein–protein interaction (PPI) networks among DEGs were constructed using the STRING database and analyzed by Cytoscape. Results: A total of 515 DEGs were identified in MTLE-HS samples with a febrile seizure history compared to MTLEHS samples without febrile seizure, including 25 down-regulated and 490 up-regulated genes. These DEGs were expressed mostly in plasma membrane and synaptic vesicles. The major molecular functions of those genes were voltage-gated ion channel activity, extracellular ligand-gated ion channel activity and calcium ion binding. The DEGs were mainly involved in biological pathways of cell communication signal transduction and transport. Five genes (SNAP25, SLC32A1, SYN1, GRIN1, and GRIA1) were significantly expressed in the MTLE-HS with prolonged febrile seizures. Conclusion: The pathogenesis of MTLE-HS involves multiple genes, and prolonged febrile seizures could cause differential expression of genes. Thus, investigations of those genes may provide a new perspective into the mechanism of MTLE-HS. Keywords: Bioinformatical analysis, Febrile seizures, Epilepsy, Hippocampal sclerosis
Background Epilepsy is a disabling and frequent neurological disease that causes a significant burden on patients worldwide. Epilepsy is characterized by sudden attacks and recurrent seizures due to abnormal excessive neuronal discharges [1]. It can occur at any age and currently has affected about 70 million people worldwide [2]. * Correspondence: [email protected] The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen 518107, China
Temporal lobe epilepsy is a focal type of epilepsy characterized by recurrent lesions in the temporal lobe, most commonly occurring in the medial lobe. It is related with a variety of mental phenomena, including hallucinations, cognitive impairment and emotional experience. Mesial temporal lobe epilepsy with hippocampal sclerosis (MTLE-HS) is one of the common epilepsy syndromes worldwide, which commonly arises from longduration seizures, especially febrile status epilepticus, in the early life [3, 4]. Despite the great efforts to uncover the etiology, the underlying pathogenesis of MTLE-HS
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