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Cerebrospinal fluid microRNAs are potential biomarkers of temporal lobe epilepsy and status epilepticus.

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posted on 22.11.2019, 16:52 by Rana Raoof, Eva M Jimenez-Mateos, Sebastian Bauer, Björn Tackenberg, Felix Rosenow, Johannes Lang, Müjgan Dogan Onugoren, Hajo Hamer, Tessa Huchtemann, Peter Körtvélyessy, Niamh M C Connolly, Shona Pfeiffer, Jochen H M Prehn, Donncha F O'Brien, David C Henshall, Catherine Mooney

There is a need for diagnostic biomarkers of epilepsy and status epilepticus to support clinical examination, electroencephalography and neuroimaging. Extracellular microRNAs may be potentially ideal biomarkers since some are expressed uniquely within specific brain regions and cell types. Cerebrospinal fluid offers a source of microRNA biomarkers with the advantage of being in close contact with the target tissue and sites of pathology. Here we profiled microRNA levels in cerebrospinal fluid from patients with temporal lobe epilepsy or status epilepticus, and compared findings to matched controls. Differential expression of 20 microRNAs was detected between patient groups and controls. A validation phase included an expanded cohort and samples from patients with other neurological diseases. This identified lower levels of miR-19b in temporal lobe epilepsy compared to controls, status epilepticus and other neurological diseases. Levels of miR-451a were higher in status epilepticus compared to other groups whereas miR-21-5p differed in status epilepticus compared to temporal lobe epilepsy but not to other neurological diseases. Targets of these microRNAs include proteins regulating neuronal death, tissue remodelling, gliosis and inflammation. The present study indicates cerebrospinal fluid contains microRNAs that can support differential diagnosis of temporal lobe epilepsy and status epilepticus from other neurological and non-neurological diseases.

Funding

European Union’s ‘Seventh Framework’ Programme (FP7) under Grant Agreement no. 602130. Science Foundation Ireland (SFI) grants SFI/13/IA/1891, SFI/14/ADV/RC2721, 13/SIRG/2114, SFI/12/COEN/18 and SFI/12/RC/2272, the Detlev-Wrobel-Fonds for Epilepsy Research Frankfurt and a fellowship from the Iraqi Ministry of Higher Education and Scientific Research.

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The original article is available at https://www.nature.com/

Published Citation

Raoof R, Jimenez-Mateos EM, Bauer S, Tackenberg B, Rosenow F, Lang J, Onugoren MD, Hamer H, Huchtemann T, Kortvelyessy P, Connolly NMC, Pfeiffer S, Prehn JHM, Farrell MA, O'Brien DF, Henshall DC, Mooney C. Cerebrospinal fluid microRNAs are potential biomarkers of temporal lobe epilepsy and status epilepticus. Scientific Reports. 2017; 7(1):3328

Publication Date

12/06/2017

Publisher

Nature Publishing Group

PubMed ID

28607431

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