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Updated: Jan 28, 2026
Primary Culture of Mouse Dopaminergic Neurons
Published on: September 8, 2014
Down-Regulation of m6A mRNA Methylation Is Involved in Dopaminergic Neuronal Death
Xuechai Chen1, Chunyu Yu1, Minjun Guo1
1College of Life Science and Bioengineering , Beijing University of Technology , 100 Pingleyuan , Chaoyang District, Beijing 100122 , China.
Abstract:
N6-Methyladenosine (m6A) is the most prevalent internal modification that occurs in the mRNA of eukaryotes and plays a vital role in the post-transcriptional regulation. Recent studies highlighted the biological significance of m6A modification in the nervous system, and its dysregulation has been shown to be related to degenerative and neurodevelopmental diseases. Parkinson's disease (PD) is a common age-related neurological disorder with its pathogenesis still not fully elucidated. Reports have shown that epigenetic mechanisms including DNA methylation and histone acetylation, which alter gene expression, are associated with PD. In this study, we found that global m6A modification of mRNAs is down-regulated in 6-OHDA-induced PC12 cells and the striatum of PD rat brain. To further explore the relationship between m6A mRNA methylation and molecular mechanism of PD, we decreased m6A in dopaminergic cells by overexpressing a nucleic acid demethylase, FTO, or by m6A inhibitor. The results showed that m6A reduction could induce the expression of N-methyl-d-aspartate (NMDA) receptor 1, and elevate oxidative stress and Ca2+ influx, resulting in dopaminergic neuron apoptosis. Collectively, m6A modification may play a vital role in the death of dopaminergic neuron, which provides a novel view of mRNA methylation to understand the epigenetic regulation of Parkinson's disease.
Insights
N6-Methyladenosine (m6A) mRNA modification is reduced in Parkinson's disease models. Lowering m6A levels promotes dopaminergic neuron death via NMDA receptor 1, oxidative stress, and calcium influx.
Area of Science:
- Epigenetics
- Neuroscience
- Molecular Biology
Background:
- N6-Methyladenosine (m6A) is a prevalent mRNA modification crucial for post-transcriptional regulation.
- m6A dysregulation is implicated in neurodegenerative and neurodevelopmental diseases.
- Epigenetic alterations, including DNA methylation and histone acetylation, are linked to Parkinson's disease (PD) pathogenesis.
Purpose of the Study:
- To investigate the role of m6A mRNA modification in Parkinson's disease.
- To explore the molecular mechanisms underlying dopaminergic neuron loss in PD related to m6A.
- To determine if m6A reduction impacts dopaminergic neuron survival.
Main Methods:
- Assessed global m6A levels in 6-OHDA-induced PC12 cells and PD rat striatum.
- Manipulated m6A levels in dopaminergic cells using FTO overexpression and m6A inhibitors.
- Evaluated the effects of m6A reduction on NMDA receptor 1 expression, oxidative stress, Ca2+ influx, and apoptosis.
Main Results:
- Global m6A mRNA modification was down-regulated in PD models (PC12 cells and rat brains).
- Reduced m6A levels led to increased expression of N-methyl-d-aspartate (NMDA) receptor 1.
- Decreased m6A induced oxidative stress and Ca2+ influx, ultimately causing dopaminergic neuron apoptosis.
Conclusions:
- m6A mRNA modification plays a significant role in dopaminergic neuron death.
- m6A reduction contributes to PD pathogenesis through NMDA receptor 1 pathway.
- This study offers a novel perspective on mRNA methylation in the epigenetic regulation of Parkinson's disease.
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