Regulation of inflammatory processes by caspases

Area of Science:

• Molecular biology
• Immunology
• Cell biology

Background:

• Mammalian caspases are cysteine proteases historically classified as inflammatory or apoptotic.
• This distinction is challenged by emerging evidence from preclinical models.
• Caspases play multifaceted roles beyond their traditional classifications.

Purpose of the Study:

• To re-evaluate the functional classification of mammalian caspases.
• To explore the molecular mechanisms by which caspases regulate inflammation.
• To highlight the role of apoptotic caspases in suppressing inflammatory responses.

Main Methods:

• Review of preclinical models and existing literature.
• Analysis of molecular pathways involving caspases in cell death and inflammation.
• Discussion of evolutionary roles of caspases.

Main Results:

• Apoptotic caspases are not essential for initiating apoptosis but modulate its presentation.
• Most mammalian caspases act as regulators of inflammatory processes.
• Apoptotic caspases can suppress inflammation to maintain homeostasis.

Conclusions:

• The traditional separation of caspases into inflammatory and apoptotic families is an oversimplification.
• Caspases, particularly apoptotic ones, are crucial in regulating inflammatory responses.
• Understanding these roles is vital for maintaining organismal homeostasis.