Proteolytic control of regulated necrosis.

Area of Science:

• Cellular Biology
• Biochemistry
• Molecular Medicine

Background:

• Proteases are fundamental regulators of cellular processes, including apoptosis (programmed cell death).
• The role of proteolysis in non-apoptotic cell death, termed regulated necrosis (RN), has been historically unclear.
• Recent discoveries highlight the significance of proteolysis in various RN pathways.

Purpose of the Study:

• To review recent groundbreaking discoveries concerning proteolysis in regulated necrosis.
• To provide an overview of proteolysis' role in known forms of RN.
• To focus on the regulation of necroptosis and pyroptosis by deubiquitinases and caspases.

Main Methods:

• Literature review of recent discoveries in proteolysis and regulated necrosis.
• Synthesis of information on the mechanisms of necroptosis and pyroptosis.
• Analysis of the regulatory roles of deubiquitinases and caspases in RN.

Main Results:

• Proteolysis is a critical mechanism in both the initiation and execution of apoptosis via caspases.
• Emerging evidence confirms the substantial impact of proteolysis on regulated necrosis pathways.
• Specific focus on necroptosis and pyroptosis reveals complex regulation involving deubiquitinases and both apoptotic and inflammatory caspases.

Conclusions:

• Proteolysis is a central regulatory event across diverse cell death modalities, including regulated necrosis.
• Understanding proteolysis in RN pathways like necroptosis and pyroptosis is crucial for pathophysiology.
• Further research into caspase and deubiquitinase roles in RN will illuminate therapeutic strategies.