Silencing microRNA-134 produces neuroprotective and prolonged seizure-suppressive effects.
Silencing microRNA-134 produces neuroprotective and prolonged seizure-suppressive effects.
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DOI:
10.1038/nm.2834
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发表时间:
2012-07
期刊:
影响因子:
82.9
通讯作者:
Henshall, David C.
中科院分区:
文献类型:
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作者:
Jimenez-Mateos, Eva M.;Engel, Tobias;Merino-Serrais, Paula;McKiernan, Ross C.;Tanaka, Katsuhiro;Mouri, Genshin;Sano, Takanori;O'Tuathaigh, Colm;Waddington, John L.;Prenter, Suzanne;Delanty, Norman;Farrell, Michael A.;O'Brien, Donncha F.;Conroy, Ronan M.;Stallings, Raymond L.;DeFelipe, Javier;Henshall, David C.
Temporal lobe epilepsy is a common, chronic neurologic disorder characterized by recurrent spontaneous seizures. MicroRNAs (miRNAs) are small, non-coding RNAs that regulate post-transcriptional expression of protein-coding mRNAs, which may have important roles in the pathogenesis of neurologic disorders. In models of prolonged, injurious seizures (status epilepticus) and in experimental and human epilepsy, we found up-regulation of miR-134, a brain-specific, activity-regulated miRNA implicated in the control of dendritic spine morphology. Silencing of miR-134 expression in vivo using antagomirs reduced hippocampal CA3 pyramidal neuron dendrite spine density by 21%, and rendered mice refractory to seizures and hippocampal injury caused by status epilepticus. Depletion of miR-134 after status epilepticus reduced the later occurrence of spontaneous seizures by over 90% and mitigated attendant pathologic features of temporal lobe epilepsy. Thus, silencing miR-134 exerts prolonged seizure suppressant and neuroprotective actions; whether these represent anticonvulsant or truly antiepileptogenic effects requires additional experimentation.
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