CerS6-Derived Sphingolipids Interact with Mff and Promote Mitochondrial Fragmentation in Obesity
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View abstract on PubMed
Summary
This summary is machine-generated.Ceramide synthase 6 (CerS6) produces C16:0 sphingolipids that bind mitochondrial fission factor (Mff), linking obesity and insulin resistance. Inhibiting this CerS6-Mff interaction may treat metabolic diseases.
Area Of Science
- Biochemistry
- Cell Biology
- Metabolic Diseases
Background
- Ectopic lipid deposition and altered mitochondrial dynamics are linked to obesity and insulin resistance.
- The precise molecular mechanisms connecting these processes remain incompletely understood.
Purpose Of The Study
- To elucidate the role of ceramide synthases (CerS) in sphingolipid metabolism and mitochondrial function.
- To identify the specific C16:0 sphingolipids and their interacting partners involved in metabolic regulation.
- To investigate the CerS6-Mff interaction as a potential therapeutic target for obesity and insulin resistance.
Main Methods
- Utilized genetic ablation of CerS5 and CerS6 in mouse models.
- Investigated protein-sphingolipid interactions using biochemical assays.
- Assessed mitochondrial morphology and function in vitro and in vivo.
- Analyzed genetic interactions between CerS6 and Mff in models of obesity and insulin resistance.
Main Results
- CerS6, but not CerS5, deficiency protected against obesity and insulin resistance.
- CerS6-derived C16:0 sphingolipids specifically bind the mitochondrial fission factor (Mff).
- Combined CerS6 and Mff deficiency ameliorated obesity-induced mitochondrial fragmentation and insulin resistance.
Conclusions
- Sphingolipid signaling exhibits enzyme-specific regulation, with CerS6 playing a critical role in metabolic homeostasis.
- A direct mechanistic link exists between hepatic lipid accumulation, mitochondrial fragmentation, and insulin resistance via the CerS6-derived sphingolipid-Mff pathway.
- Targeting the CerS6-derived sphingolipid/Mff interaction presents a promising therapeutic strategy for metabolic diseases.
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