2. Academic Validation
  3. Fucoxanthin rescues dexamethasone induced C2C12 myotubes atrophy

Fucoxanthin rescues dexamethasone induced C2C12 myotubes atrophy

  • Biomed Pharmacother. 2021 Jul;139:111590. doi: 10.1016/j.biopha.2021.111590.
Liao Zhiyin 1,  Chen Jinliang 2,  Chen Qiunan 3,  Yang Yunfei 4,  Xiao Qian 5
Affiliations

Affiliations

  • 1 Department of Geriatrics, the First Affiliated Hospital of Chongqing Medical University, China. Electronic address: [email protected].
  • 2 Department of Geriatrics, the First Affiliated Hospital of Chongqing Medical University, China. Electronic address: [email protected].
  • 3 Department of Geriatrics, the First Affiliated Hospital of Chongqing Medical University, China. Electronic address: [email protected].
  • 4 Department of Geriatrics, the First Affiliated Hospital of Chongqing Medical University, China. Electronic address: [email protected].
  • 5 Department of Geriatrics, the First Affiliated Hospital of Chongqing Medical University, China. Electronic address: [email protected].
PMID: 33865017 DOI: 10.1016/j.biopha.2021.111590
Abstract

Muscle atrophy and weakness are the adverse effects of long-term or high dose usage of glucocorticoids. In the present study, we explored the effects of fucoxanthin (10 μM) on dexamethasone (10 μM)-induced atrophy in C2C12 myotubes and investigated its underlying mechanisms. The diameter of myotubes was observed under a LIGHT microscope, and the expression of Myosin heavy chain (MyHC), proteolysis-related, autophagy-related, apoptosis-related, and mitochondria-related proteins was analyzed by western blots or immunoprecipitation. Fucoxanthin alleviates dexamethasone-induced muscle atrophy in C2C12 myotubes, indicated by increased myotubes diameter and expression of MyHC, decreased expression of muscle atrophy F-box (Atrogin-1) and muscle ring finger 1 (MuRF1). Through activating SIRT1, fucoxanthin inhibits forkhead box O (FoxO) transcriptional activity to reduce protein degradation, induces Autophagy to enhance degraded protein clearance, promotes mitochondrial function and diminishes Apoptosis. In conclusion, we identified fucoxanthin ameliorates dexamethasone induced C2C12 myotubes atrophy through SIRT1 activation.

Keywords

Atrophy; C2C12; Dexamethasone; Fucoxanthin; SIRT1.

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