| First Author | Sun N | Year | 2025 |
| Journal | Nat Commun | Volume | 16 |
| Issue | 1 | Pages | 5465 |
| PubMed ID | 40593619 | Mgi Jnum | J:369104 |
| Mgi Id | MGI:8218669 | Doi | 10.1038/s41467-025-60670-z |
| Citation | Sun N, et al. (2025) Mitophagy mitigates mitochondrial fatty acid beta-oxidation deficient cardiomyopathy. Nat Commun 16(1):5465 |
| abstractText | The healthy heart relies on mitochondrial fatty acid beta-oxidation (FAO) to sustain its high energy demands. FAO deficiencies can cause muscle weakness, cardiomyopathy, and, in severe cases, neonatal/infantile mortality. Although FAO deficits are thought to induce mitochondrial stress and activate mitophagy, a quality control mechanism that eliminates damaged mitochondria, the mechanistic link in the heart remains unclear. Here we show that mitophagy is unexpectedly suppressed in FAO-deficient hearts despite pronounced mitochondrial stress, using a cardiomyocyte-specific carnitine palmitoyltransferase 2 (CPT2) knockout model. Multi-omics profiling reveals impaired PINK1/Parkin signaling and dysregulation of PARL, a mitochondrial protease essential for PINK1 processing. Strikingly, deletion of USP30, a mitochondrial deubiquitinase that antagonizes PINK1/Parkin function, restores mitophagy, improves cardiac function, and significantly extends survival in FAO-deficient animals. These findings redefine the mitophagy response in FAO-deficient hearts and establish USP30 as a promising therapeutic target for metabolic cardiomyopathies and broader heart failure characterized by impaired FAO. |
