Drp1 controls complex II assembly and skeletal muscle metabolism by Sdhaf2 action on mitochondria.
Sci Adv
; 10(14): eadl0389, 2024 Apr 05.
Article
em En
| MEDLINE
| ID: mdl-38569044
ABSTRACT
The dynamin-related guanosine triphosphatase, Drp1 (encoded by Dnm1l), plays a central role in mitochondrial fission and is requisite for numerous cellular processes; however, its role in muscle metabolism remains unclear. Here, we show that, among human tissues, the highest number of gene correlations with DNM1L is in skeletal muscle. Knockdown of Drp1 (Drp1-KD) promoted mitochondrial hyperfusion in the muscle of male mice. Reduced fatty acid oxidation and impaired insulin action along with increased muscle succinate was observed in Drp1-KD muscle. Muscle Drp1-KD reduced complex II assembly and activity as a consequence of diminished mitochondrial translocation of succinate dehydrogenase assembly factor 2 (Sdhaf2). Restoration of Sdhaf2 normalized complex II activity, lipid oxidation, and insulin action in Drp1-KD myocytes. Drp1 is critical in maintaining mitochondrial complex II assembly, lipid oxidation, and insulin sensitivity, suggesting a mechanistic link between mitochondrial morphology and skeletal muscle metabolism, which is clinically relevant in combatting metabolic-related diseases.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Succinato Desidrogenase
/
Insulinas
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article