Regulating eEF2 and eEF2K in skeletal muscle by exercise

Area of Science:

• Exercise Physiology
• Molecular Biology
• Skeletal Muscle Biology

Background:

• Skeletal muscle adapts to exercise by increasing muscle protein synthesis (MPS).
• Translation elongation is a critical, yet understudied, rate-limiting step in MPS.
• Elongation factors are regulated by cellular energy status and physiological stimuli like exercise.

Purpose of the Study:

• To review the effects of exercise training on the skeletal muscle translation elongation pathway.
• To elucidate the molecular factors regulating translation elongation in response to exercise.
• To discuss the influence of exercise mode and volume on this pathway.

Main Methods:

• Literature review focusing on molecular mechanisms and signaling pathways.
• Analysis of experimental data on translation elongation during and after exercise.
• Synthesis of current understanding regarding exercise and MPS regulation.

Main Results:

• Exercise training influences the translation elongation pathway through various signaling cascades.
• Key molecular factors including Ca2+, AMPK, PKA, mTORC1/P70S6K, MAPKs, and myostatin are implicated.
• Exercise modulates the regulation of translation elongation, impacting overall MPS.

Conclusions:

• Exercise training plays a significant role in modulating the translation elongation pathway in skeletal muscle.
• A deeper understanding of these mechanisms enhances knowledge of exercise-induced muscle adaptation.
• Further research into translation elongation offers insights into optimizing MPS through exercise interventions.