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

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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.

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Acknowledgments

This work was kindly supported by the National Natural Science Foundation of China (nos. 30872790, 30901631, 81171226, and 81100846) and the Scientific and Technological Department of Hunan Province (2011FJ3163). We are most grateful to Dr. Lixin Zhang (Department of Ophthalmology, Xiangya Hospital, China), Dr. Zeng Lei (Department of Spinal Surgery, Xiangya Hospital, China), and Yasmin Majeed, Central South University, for their kind help during the preparation of this work.

Conflict of Interest

None of the authors have any conflict of interest to disclose.

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Authors and Affiliations

  1. Department of Pediatrics, Xiangya Hospital of Central South University, No. 87 Xiangya Road, Changsha, Hunan, 410008, China

    Muhammad Usman Ashhab, Ahmed Omran, Huimin Kong, Na Gan, Fang He, Jing Peng & Fei Yin

  2. Department of Pediatrics and Neonatology, Suez Canal University, Ismailia, 41522, Egypt

    Ahmed Omran

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  1. Muhammad Usman Ashhab
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  2. Ahmed Omran
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  7. Fei Yin
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Correspondence to Fei Yin.

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Ashhab, M.U., Omran, A., Kong, H. et al. Expressions of Tumor Necrosis Factor Alpha and MicroRNA-155 in Immature Rat Model of Status Epilepticus and Children with Mesial Temporal Lobe Epilepsy. J Mol Neurosci 51, 950–958 (2013). https://doi.org/10.1007/s12031-013-0013-9

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