Chaperone-mediated autophagy: Advances from bench to bedside

Area of Science:

• Cellular Biology
• Molecular Biology
• Biochemistry

Background:

• Proteostasis, the balance of protein synthesis and degradation, is vital for cell function.
• Lysosomes degrade cellular components via autophagy, with chaperone-mediated autophagy (CMA) selectively targeting proteins containing a KFERQ-like motif.
• Recent research has elucidated CMA regulation and its involvement in physiological and pathological processes.

Purpose of the Study:

• To summarize recent advances in chaperone-mediated autophagy (CMA) biology.
• To highlight the role of endoplasmic reticulum (ER) stress in modulating CMA.
• To discuss the implications of CMA in various diseases, particularly neurodegenerative disorders.

Main Methods:

• Review of recent scientific literature on CMA.
• Analysis of studies investigating CMA regulation by cellular stress pathways, including ER stress.
• Examination of research linking CMA substrates and function to disease pathogenesis.

Main Results:

• Significant progress has been made in understanding CMA regulation and its substrates.
• Emerging evidence demonstrates that ER stress can signal to and modulate CMA activity.
• CMA's role is increasingly associated with cellular processes, organelles, and diseases like neurodegeneration.

Conclusions:

• CMA is a crucial selective protein degradation pathway with expanding implications.
• ER stress represents a key regulatory input for CMA.
• Dysregulation of CMA is implicated in the pathology of several diseases, offering potential therapeutic targets.