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N6-甲基腺苷(m6A)失调导致颞叶癫痫的网络兴奋性。

N6-methyladenosine (m6A) dysregulation contributes to network excitability in temporal lobe epilepsy.

作者信息

Mathoux Justine, Wilson Marc-Michel, Srinivas Sujithra, Litovskich Gabrielle, Villalba Benito Leticia, Tran Cindy, Kesavan Jaideep, Harnett Aileen, Auer Theresa, Sanz-Rodriguez Amaya, Kh A E Alkhayyat Mohammad, Sullivan Mairéad, Liu Zining, Huang Yifan, Lacey Austin, Delanty Norman, Cryan Jane, Brett Francesca M, Farrell Michael A, O'Brien Donncha F, Casillas-Espinosa Pablo M, Jimenez-Mateos Eva M, Glennon Jeffrey C, Canavan Mary, Henshall David C, Brennan Gary P

机构信息

Department of Physiology and Medical Physics, RCSI University of Medicine and Health Sciences, Dublin, Ireland.

FutureNeuro Research Ireland Centre for Translational Brain Science, and.

出版信息

JCI Insight. 2025 Jul 22;10(14). doi: 10.1172/jci.insight.188612.


DOI:10.1172/jci.insight.188612
PMID:40693462
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12288969/
Abstract

Analogous to DNA methylation and protein phosphorylation, it is now well understood that RNA is also subject to extensive processing and modification. N6-methyladenosine (m6A) is the most abundant internal RNA modification and regulates RNA fate in several ways, including stability and translational efficiency. The role of m6A in both experimental and human epilepsy remains unknown. Here, we used transcriptome-wide m6A arrays to obtain a detailed analysis of the hippocampal m6A-ome from both mouse and human epilepsy samples. We combined this with human proteomic analyses and show that epileptic tissue displays disrupted metabolic and autophagic pathways that may be directly linked to m6A processing. Specifically, our results suggest that m6A levels inversely correlate with protein pathway activation. Finally, we show that elevated levels of m6A decrease seizure susceptibility and severity in mice. Together, our findings indicate that m6A represents an additional layer of gene regulation complexity in epilepsy and may contribute to the pathomechanisms that drive the development and maintenance of hyperexcitable brain networks.

摘要

与DNA甲基化和蛋白质磷酸化类似,现在人们已经充分认识到RNA也会经历广泛的加工和修饰。N6-甲基腺苷(m6A)是最丰富的内部RNA修饰,它通过多种方式调节RNA的命运,包括稳定性和翻译效率。m6A在实验性癫痫和人类癫痫中的作用仍然未知。在这里,我们使用全转录组m6A阵列对小鼠和人类癫痫样本的海马m6A组进行了详细分析。我们将此与人类蛋白质组学分析相结合,表明癫痫组织中代谢和自噬途径受到破坏,这可能与m6A加工直接相关。具体而言,我们的结果表明m6A水平与蛋白质途径激活呈负相关。最后,我们表明m6A水平升高会降低小鼠的癫痫易感性和严重程度。总之,我们的研究结果表明,m6A代表了癫痫中基因调控复杂性的一个额外层面,可能有助于驱动高兴奋性脑网络发展和维持的病理机制。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/86fe/12288969/9a4350908829/jciinsight-10-188612-g066.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/86fe/12288969/8d5d58f8eab3/jciinsight-10-188612-g058.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/86fe/12288969/55da09d90b70/jciinsight-10-188612-g059.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/86fe/12288969/00e62656a282/jciinsight-10-188612-g060.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/86fe/12288969/52adafc301da/jciinsight-10-188612-g061.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/86fe/12288969/a3deeebe04d9/jciinsight-10-188612-g062.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/86fe/12288969/b8a2511d23b3/jciinsight-10-188612-g063.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/86fe/12288969/5e9a443128b7/jciinsight-10-188612-g064.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/86fe/12288969/868acf140864/jciinsight-10-188612-g065.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/86fe/12288969/9a4350908829/jciinsight-10-188612-g066.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/86fe/12288969/8d5d58f8eab3/jciinsight-10-188612-g058.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/86fe/12288969/55da09d90b70/jciinsight-10-188612-g059.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/86fe/12288969/00e62656a282/jciinsight-10-188612-g060.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/86fe/12288969/52adafc301da/jciinsight-10-188612-g061.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/86fe/12288969/a3deeebe04d9/jciinsight-10-188612-g062.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/86fe/12288969/b8a2511d23b3/jciinsight-10-188612-g063.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/86fe/12288969/5e9a443128b7/jciinsight-10-188612-g064.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/86fe/12288969/868acf140864/jciinsight-10-188612-g065.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/86fe/12288969/9a4350908829/jciinsight-10-188612-g066.jpg

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[1]
N6-methyladenosine (m6A) dysregulation contributes to network excitability in temporal lobe epilepsy.

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本文引用的文献

[1]
Aberrant splicing in Huntington's disease accompanies disrupted TDP-43 activity and altered m6A RNA modification.

Nat Neurosci. 2025-2

[2]
The PRIDE database at 20 years: 2025 update.

Nucleic Acids Res. 2025-1-6

[3]
The m6A reader YTHDC2 promotes the pathophysiology of temporal lobe epilepsy by modulating SLC7A11-dependent glutamate dysregulation in astrocytes.

Theranostics. 2024

[4]
Single-cell discovery of mA RNA modifications in the hippocampus.

Genome Res. 2024-7-23

[5]
Identification of differential m6A RNA methylomes and ALKBH5 as a potential prevention target in the developmental neurotoxicity induced by multiple sevoflurane exposures.

FASEB J. 2024-7-31

[6]
Prediction of m6A and m5C at single-molecule resolution reveals a transcriptome-wide co-occurrence of RNA modifications.

Nat Commun. 2024-5-9

[7]
Integration of multi-omics summary data reveals the role of N6-methyladenosine in neuropsychiatric disorders.

Mol Psychiatry. 2024-10

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Insights into epileptogenesis from post-traumatic epilepsy.

Nat Rev Neurol. 2024-5

[9]
Understanding the redundant functions of the mA-binding YTHDF proteins.

RNA. 2024-4-16

[10]
m6A RNA methylation regulates mitochondrial function.

Hum Mol Genet. 2024-5-18

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