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The molecular regulation of programmed necrotic cell injury

David Moquin1, Francis Ka-Ming Chan

  • 1Department of Pathology, Immunology and Virology Program, University of Massachusetts Medical School, 55 Lake Avenue North, Worcester, MA 01655, USA.

Trends in Biochemical Sciences
|March 30, 2010
PubMed

Insights

Necrosis, an inflammatory cell death, involves distinct molecular pathways from apoptosis. Receptor-interacting protein (RIP) kinases are crucial for programmed necrosis, regulated by caspases, ubiquitylation, and phosphorylation.

Area of Science:

  • Cell Biology
  • Immunology
  • Molecular Biology

Background:

  • Cell death regulation is vital for metazoan development and function.
  • Necrosis, unlike apoptosis, is inflammatory and may aid antiviral immunity.
  • TNF superfamily receptors can trigger both apoptosis and necrosis.

Purpose of the Study:

  • To review the molecular mechanisms distinguishing programmed necrosis from apoptosis.
  • To highlight the role of receptor-interacting protein (RIP) kinases in necrosis.
  • To discuss the interplay between apoptosis and necrosis, focusing on regulatory factors.

Main Methods:

  • Review of existing literature on programmed necrosis and apoptosis.
  • Analysis of biochemical pathways involved in TNF-like cytokine signaling.
  • Focus on the roles of caspases, ubiquitylation, and phosphorylation.

Main Results:

  • Necrotic cell injury is characterized by swelling and plasma membrane rupture.
  • Programmed necrosis requires distinct biochemical components compared to apoptosis.
  • RIP kinases are essential for programmed necrotic cell death induction.

Conclusions:

  • Programmed necrosis is a regulated process with unique molecular requirements.
  • Caspases, protein ubiquitylation, and phosphorylation are key regulators of necrosis.
  • Understanding necrosis pathways is crucial for comprehending immune responses and development.

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