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Cinnamaldehyde regulates H2 O 2 -induced skeletal muscle atrophy by ameliorating the proteolytic and antioxidant

Nirmaljeet Kaur1, Prachi Gupta1, Vikram Saini2

  • 1Skeletal Muscle Lab, University College, Kurukshetra University, Kurukshetra, India.

Journal of Cellular Physiology
|October 15, 2018
PubMed

Insights

Cinnamaldehyde (CNA) protects muscle cells from atrophy by managing reactive oxygen species (ROS) and inhibiting protein breakdown pathways. This study explores CNA

Area of Science:

  • Biochemistry
  • Cell Biology
  • Muscle Physiology

Background:

  • Skeletal muscle atrophy is linked to impaired protein metabolism, elevated reactive oxygen species (ROS), and compromised antioxidant defenses.
  • While cinnamaldehyde (CNA) is known for its antioxidant properties, its effects on skeletal muscle atrophy remain largely unexplored.

Purpose of the Study:

  • To investigate the impact of cinnamaldehyde (CNA) on C2C12 myotubes.
  • To determine if CNA can protect cultured muscle cells against hydrogen peroxide (H2O2)-induced atrophy.

Main Methods:

  • C2C12 myotubes were treated with H2O2 in the presence or absence of CNA.
  • Assessed morphological changes, biochemical markers (creatine kinase, lactate dehydrogenase, succinate dehydrogenase), muscle-specific proteins (myosin heavy chain-fast), and key proteolytic pathways (ubiquitin-proteasome, autophagy, cathepsin L, calpain, caspase).
  • Evaluated the activity of antioxidant defense enzymes (catalase, glutathione-S-transferase, glutathione-peroxidase, superoxide dismutase, glutathione reductase).

Main Results:

  • CNA demonstrated significant protective effects on myotube morphology, including length, diameter, and nuclei fusion index.
  • CNA preserved muscle-specific proteins and key biochemical markers of muscle health.
  • CNA pretreatment inhibited the activation of major proteolytic systems and prevented alterations in antioxidant enzyme activities, maintaining cellular redox balance.

Conclusions:

  • Cinnamaldehyde (CNA) effectively protects myotubes from H2O2-induced atrophy.
  • CNA functions by inhibiting proteolytic systems and preserving cellular redox balance, suggesting its therapeutic potential for muscle wasting conditions.
Keywords:
MuRF1/Atrogin1atrophycalpaincathepsincinnamaldehydeoxidative stress

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