Mitochondrial Tumor Suppressor 1A Attenuates Myocardial Infarction Injury by Maintaining the Coupling Between Mitochondria and Endoplasmic Reticulum
Authors' conclusion
Our study demonstrates that Mtus1A is crucial for modulating MI-induced cardiac remodeling by preserving ER-mitochondria communication and ameliorating mitochondrial function in cardiomyocytes.
Study context
- Population
- Mouse myocardial infarction (MI) model (left coronary artery ligation), neonatal rat ventricular myocytes under oxygen glucose deprivation, human cardiomyocytes
Main finding
As reported in the abstract
- Mtus1 expression significantly downregulated in human cardiomyocytes under ischaemia
- Mtus1A expression reduced in mouse LV after MI
- Cardiac-specific Mtus1-knockout mice: worsened cardiac dysfunction after MI
- Mtus1A partially localises to MAMs, modulates MAMs coupling and preserves mitochondrial function
- Mtus1A acts as scaffold maintaining IP3R1-Grp75-VDAC1 complex via amino acid sequence 189-219
- Mtus1A stabilised by K6-linked ubiquitination through E3 ligase Fbxo7
- Mtus1A overexpression mitigated MI-induced cardiac dysfunction and remodelling by maintaining MAMs integrity
Original publication
Mitochondrial Tumor Suppressor 1A Attenuates Myocardial Infarction Injury by Maintaining the Coupling Between Mitochondria and Endoplasmic Reticulum. Circulation. Published 30 June 2025. doi:10.
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