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Updated: Jun 29, 2025

Isolation of Intermediate Filament Proteins from Multiple Mouse Tissues to Study Aging-associated Post-translational Modifications
Published on: May 18, 2017
METTL3-mediated m6A modification increases Hspa1a stability to inhibit osteoblast aging
Yaobin Wang1,2,3, Yi Chen1,2,3, Hefang Xiao1,2,3
1Department of Orthopaedics, Lanzhou University Second Hospital, Lanzhou, Gansu, 730030, China.
Methyltransferase-like 3 (METTL3) inhibits osteoblast aging, a key factor in senile osteoporosis. METTL3 stabilizes Hspa1a mRNA, offering a potential therapeutic target for osteoporosis.
Area of Science:
- Molecular Biology
- Cell Biology
- Gerontology
Background:
- Senile osteoporosis stems from osteoblast dysfunction, leading to decreased bone mass.
- The role of m6A modification in osteoporosis is increasingly recognized, particularly in bone marrow mesenchymal stem cell differentiation.
- The direct regulatory mechanism of m6A on osteoblasts remains largely unexplored.
Purpose of the Study:
- To investigate the direct regulatory mechanism of m6A modification on osteoblast aging.
- To elucidate the role of methyltransferase-like 3 (METTL3) in senile osteoporosis.
- To identify potential therapeutic targets for senile osteoporosis.
Main Methods:
- Overexpression of METTL3 in osteoblasts.
- Methylated RNA immunoprecipitation sequencing (MeRIP-seq) to identify m6A targets.
- Analysis of Hspa1a mRNA stability and its association with METTL3 and YTHDF2.
Main Results:
- Downregulation of m6A modification and METTL3 correlates with senile osteoporosis progression.
- METTL3 overexpression inhibits osteoblast aging.
- METTL3 upregulates Hspa1a mRNA stability via m6A modification, dependent on YTH N6-methyladenosine RNA binding protein 2 (YTHDF2), to inhibit osteoblast aging.
Conclusions:
- METTL3 plays a significant role in regulating osteoblast aging.
- METTL3-mediated stabilization of Hspa1a mRNA is a novel mechanism inhibiting osteoblast aging.
- METTL3 represents a potential therapeutic target for senile osteoporosis.
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