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Epitranscriptomic m6A regulation following spinal cord injury
Lingyan Xing1, Yunyun Cai2, Tuo Yang3
1Key Laboratory of Neuroregeneration of Jiangsu and the Ministry of Education, Co-innovation Center of Neuroregeneration, Nantong University, Nantong, China.
Journal of Neuroscience Research
|December 3, 2020
Summary
RNA methylation, specifically N6-methyladenosine (m6A), is altered after spinal cord injury (SCI) in zebrafish. This epigenetic modification and the METTL3 enzyme are crucial for spinal cord regeneration and conserved in mice.
Area of Science:
- Neuroscience
- Epigenetics
- Regenerative Medicine
Background:
- RNA methylation plays roles in various biological processes.
- The specific involvement of RNA methylation in spinal cord regeneration remains unexplored.
- N6-methyladenosine (m6A) is a prevalent RNA modification.
Purpose of the Study:
- To investigate the role of RNA methylation, particularly m6A, in spinal cord regeneration.
- To determine if m6A profiling and methylase expression change after spinal cord injury (SCI).
- To explore the functional significance of m6A modifications and METTL3 in neural repair.
Main Methods:
- Analysis of m6A RNA methylation profiles in zebrafish after SCI.
- Quantification of Mettl3 (an m6A methylase) transcription levels.
- Examination of gene expression and methylation status of m6A-tagged genes.
- Investigation of METTL3 expression in a mouse SCI model, including astrocytes and neural stem cells.
Main Results:
- Spinal cord injury in zebrafish leads to altered m6A RNA methylation patterns.
- The transcription of the m6A methylase Mettl3 is significantly changed post-SCI.
- Many regeneration-associated genes show hypomethylation at m6A sites with concurrent upregulation of transcription.
- METTL3 expression is elevated in both zebrafish and mouse SCI models, notably in astrocytes and neural stem cells.
Conclusions:
- m6A RNA methylation is a dynamic and conserved process following spinal cord injury.
- METTL3 and m6A modifications are implicated in the mechanisms of spinal cord regeneration.
- These findings highlight a potential therapeutic target for enhancing neural repair after SCI.
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