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Bioinformatics Analysis of Microarray Profiling Identifies That the miR-203-3p Target Ppp2ca Aggravates Seizure

Lifang Zhang1, Yanran Li2, Xuexue Ye3

  • 1Department of Neurology, Changzhi People's Hospital, Changzhi Medical College, No. 161 East Jiefang Road, Changzhi, 046000, Shanxi, China. zhanglifang_phcmc@outlook.com.

Journal of Molecular Neuroscience : MN
|August 20, 2018
PubMed

Insights

This study identifies miR-203 and Ppp2ca as key genes in a mouse model of drug-induced epilepsy. Targeting Ppp2ca by miR-203 aggravates seizures, highlighting the mitogen-activated protein kinase (MAPK) pathway

Area of Science:

  • Neuroscience
  • Genetics
  • Molecular Biology

Background:

  • Epilepsy is a neurological disorder characterized by recurrent seizures.
  • Drug-induced epilepsy models are crucial for understanding seizure mechanisms.
  • Identifying key genes and pathways involved in epilepsy is essential for developing targeted therapies.

Purpose of the Study:

  • To identify key microRNA (miRNA) and messenger RNA (mRNA) genes and associated signaling pathways in a drug-induced epilepsy mouse model.
  • To elucidate the regulatory relationship between identified miRNAs and mRNAs.
  • To investigate the role of the mitogen-activated protein kinase (MAPK) signaling pathway in epilepsy.

Main Methods:

  • Microarray profiling of seizure samples from a drug-induced epilepsy mouse model.
  • Differential gene expression analysis using statistical software R.
  • Gene Set Enrichment Analysis (GSEA) for Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis.
  • Interaction analysis using Cytoscape and TargetScan7.1.
  • Dual-luciferase assay for miRNA-mRNA target validation.

Main Results:

  • Four differentially expressed miRNAs were identified in status epilepticus (SE) models.
  • Ppp2ca expression was downregulated in the MAPK signaling pathway in pilocarpine-induced SE mice.
  • The MAPK signaling pathway was upregulated in a kinase-induced SE model.
  • miR-203 was identified as a direct target of Ppp2ca in both humans and mice.
  • miR-203-3p targeting Ppp2ca was found to aggravate seizures in the SE mouse model.

Conclusions:

  • miR-203 and Ppp2ca are key regulatory players in drug-induced epilepsy.
  • The miR-203-Ppp2ca interaction within the MAPK pathway contributes to seizure exacerbation.
  • These findings offer potential therapeutic targets for epilepsy treatment.
Keywords:
EpilepsyMAPK signaling pathwayPpp2camiR-203-3p

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