Journal of Molecular Neuroscience

, Volume 51, Issue 3, pp 950–958 | Cite as

Expressions of Tumor Necrosis Factor Alpha and MicroRNA-155 in Immature Rat Model of Status Epilepticus and Children with Mesial Temporal Lobe Epilepsy

  • Muhammad Usman Ashhab
  • Ahmed Omran
  • Huimin Kong
  • Na Gan
  • Fang He
  • Jing Peng
  • Fei Yin
Article

Abstract

Recently, the role of inflammation has attracted great attention in the pathogenesis of mesial temporal lobe epilepsy (MTLE), and microRNAs start to emerge as promising new players in MTLE pathogenesis. In this study, we investigated the dynamic expression patterns of tumor necrosis factor alpha (TNF-α) and microRNA-155 (miR-155) in the hippocampi of an immature rat model of status epilepticus (SE) and children with MTLE. The expressions of TNF-α and miR-155 were significantly upregulated in the seizure-related acute and chronic stages of MTLE in the immature rat model and also in children with MTLE. Modulation of TNF-α expression, either by stimulation using myeloid-related protein (MRP8) or lipopolysaccharide or inhibition using lenalidomide on astrocytes, leads to similar dynamic changes in miR-155 expression. Our study is the first to focus on the dynamic expression pattern of miR-155 in the immature rat of SE lithium-pilocarpine model and children with MTLE and to detect their relationship at the astrocyte level. TNF-α and miR-155, having similar expression patterns in the three stages of MTLE development, and their relationship at the astrocyte level may suggest a direct interactive relationship during MTLE development. Therefore, modulation of the TNF-α/miR-155 axis may be a novel therapeutic target for the treatment of MTLE.

Keywords

TNF-α MiR-155 Neuro-inflammation Mesial temporal lobe epilepsy Astrocytes Developing brains 

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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • Muhammad Usman Ashhab
    • 1
  • Ahmed Omran
    • 1
    • 2
  • Huimin Kong
    • 1
  • Na Gan
    • 1
  • Fang He
    • 1
  • Jing Peng
    • 1
  • Fei Yin
    • 1
  1. 1.Department of PediatricsXiangya Hospital of Central South UniversityChangshaChina
  2. 2.Department of Pediatrics and NeonatologySuez Canal UniversityIsmailiaEgypt

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