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"Recruitment signals" from apoptotic cells: invitation to a quiet meal

Kodi S Ravichandran1

  • 1Carter Immunology Center and the Department of Microbiology, University of Virginia, Charlottesville, VA 22908, USA. ravi@virginia.edu

Cell
|July 3, 2003
PubMed

Insights

Cellular engulfment machinery is conserved across species, from worms to mammals. Dying cells utilize recruitment and eat-me signals to attract phagocytes for efficient corpse clearance during apoptosis.

Area of Science:

  • Cell Biology
  • Developmental Biology
  • Immunology

Background:

  • Apoptotic cell clearance is crucial for tissue homeostasis and preventing inflammation.
  • A conserved engulfment machinery operates from invertebrates to mammals.
  • The precise mechanisms of phagocyte recruitment and recognition by dying cells are under investigation.

Purpose of the Study:

  • To investigate the conserved mechanisms of apoptotic cell engulfment.
  • To elucidate the role of cell death signals in phagocyte interaction.
  • To understand the coordination between apoptosis and corpse clearance.

Main Methods:

  • Comparative analysis of engulfment pathways across different species.
  • Molecular and genetic studies in model organisms.
  • Cell-based assays to study signal-mediated interactions.

Main Results:

  • Evidence for an evolutionarily conserved engulfment machinery.
  • Identification of recruitment and eat-me signals used by apoptotic cells.
  • Demonstration of tight linkage between apoptosis execution and corpse clearance.

Conclusions:

  • The engulfment of apoptotic cells is a fundamental biological process with conserved molecular underpinnings.
  • Dying cells actively signal for their own removal through specific molecular cues.
  • Efficient corpse clearance is tightly regulated and integrated with the apoptotic process.

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