Caspases: a molecular switch node in the crosstalk between autophagy and apoptosis

Area of Science:

• Cell Biology
• Biochemistry
• Molecular Biology

Background:

• Autophagy and apoptosis are crucial catabolic processes for cellular and tissue homeostasis.
• Autophagy removes cellular waste, while apoptosis eliminates unwanted cells.
• These pathways are interconnected and influence cell fate.

Purpose of the Study:

• To provide an overview of caspases' role in the crosstalk between autophagy and apoptosis.
• To elucidate the functional relationship between these two cell death pathways.
• To highlight the importance of caspases in mediating autophagy-apoptosis interactions.

Main Methods:

• Review of existing literature on caspases, autophagy, and apoptosis.
• Analysis of molecular mechanisms governing the interplay between these processes.
• Discussion of caspase-mediated regulation of autophagy proteins and pathways.

Main Results:

• Caspases, the executioners of apoptosis, are central to the crosstalk between autophagy and apoptosis.
• Activated caspases can inhibit autophagy by degrading key autophagy proteins (e.g., Beclin-1, Atg5, Atg7).
• Caspases can also convert pro-autophagic proteins into pro-apoptotic factors, promoting cell death.

Conclusions:

• Caspases play a multifaceted role in regulating both autophagy and apoptosis.
• Deciphering caspase functions in this crosstalk is essential for understanding cell death.
• Defining these roles offers a framework for manipulating autophagy and apoptosis in therapeutic strategies.