Autophagy, apoptosis, and mitochondria: molecular integration and physiological relevance in skeletal muscle

Area of Science:

• Cellular Biology
• Molecular Biology
• Physiology

Background:

• Apoptosis and autophagy are fundamental cellular processes responding to stress and death signals.
• Both pathways are vital, as evidenced by lethality in gene-knockout models.
• Significant overlap exists in signaling pathways and effector outcomes between apoptosis and autophagy.

Purpose of the Study:

• To explore the intertwined roles of apoptosis and autophagy in cellular stress and death.
• To highlight the unique functions of these processes in skeletal muscle during disease and atrophy.
• To underscore the potential for pharmacological manipulation of these pathways for therapeutic benefit.

Main Methods:

• Review of existing literature on apoptosis and autophagy signaling.
• Analysis of genetic models demonstrating the importance of these pathways.
• Examination of cellular and physiological consequences of pathway dysfunction.

Main Results:

• Apoptosis and autophagy share common triggers and downstream effects, indicating functional redundancy.
• Dysregulation of these pathways contributes to various pathologies.
• Skeletal muscle exhibits unique roles for apoptosis and autophagy in disease and atrophy contexts.

Conclusions:

• The interplay between apoptosis and autophagy is critical for maintaining cellular homeostasis.
• Understanding these complex interactions is key to addressing diseases associated with skeletal muscle dysfunction.
• Targeting apoptosis and autophagy presents a promising avenue for novel therapeutic strategies in human health.