Hormonal
Nuclear translocation of Perilipin 5, triggered by catecholamine-induced PKA phosphorylation, integrates lipid droplet lipolysis with mitochondrial biogenesis by forming transcriptional complexes with PGC-1α and SIRT1 to promote fatty acid catabolism.
This research explains how your body coordinates fat burning with energy production during stress or fasting. When you engage in activities that trigger adrenaline (like exercise or fasting), your body doesn't just burn fat; it simultaneously builds the mitochondrial machinery to handle that fat. This suggests that combining metabolic stressors (like fasting with exercise) may optimize metabolic efficiency by leveraging this natural coordination mechanism.
We propose that Perilipin 5 is an important molecular link that couples the coordinated catecholamine activation of the PKA pathway and of lipid droplet lipolysis with transcriptional regulation to promote efficient fatty acid catabolism and prevent mitochondrial dysfunction.
Why this rating
High-quality in vitro and ex vivo mechanistic studies using multiple independent methods (co-IP, PLA, ChIP, qPCR, mutants), though lacking direct human clinical trials.
Source
Nuclear Perilipin 5 integrates lipid droplet lipolysis with PGC-1α/SIRT1-dependent transcriptional regulation of mitochondrial function
Violeta I. Gallardo-Montejano et al. · Nature Communications · 2016
DOI 10.1038/ncomms12723
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