Mixed
Co-treatment with omega-3 polyunsaturated fatty acids (EPA, DPA, or DHA) mitigates palmitate-induced lipotoxicity in skeletal muscle cells, preserving cell viability, preventing apoptosis, and maintaining mitochondrial membrane integrity.
In a cellular context, high levels of saturated fats (like palmitate) can damage muscle cells, causing them to die and stop growing. Omega-3 fatty acids (EPA, DHA, DPA) can protect these cells from this damage. Specifically, DPA was found to fully preserve cell viability and mitochondrial integrity, while EPA and DHA offered partial protection. This suggests that adequate omega-3 intake may help counteract some negative effects of high saturated fat diets on muscle health at a cellular level.
These findings demonstrate the n-3 PUFAs EPA, DPA and DHA elicit similar protective effects against PAL-induced impairments in muscle cell viability and differentiation. Mechanistically, the protective effects of DPA against PAL lipotoxicity are attributable in part to its ability to maintain mitochondrial respiratory capacity via mitigating PAL-induced loss of mitochondrial membrane integrity.
Why this rating
High-quality in vitro experimental design with multiple biological replicates and mechanistic assays, but limited to cell culture (C2C12 myoblasts) and not human subjects.
Source
Omega-3 Polyunsaturated Fatty Acids Mitigate Palmitate-Induced Impairments in Skeletal Muscle Cell Viability and Differentiation
Bill Tachtsis et al. · Frontiers in Physiology · 2020
DOI 10.3389/fphys.2020.00563
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