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Deciphering Platelets: Are They Cells or an Evolved Form of Extracellular Vesicles?

Eric Boilard1, Dylan Burger2, Edit Buzas3,4,5

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Platelets, essential for vascular integrity, are anucleate fragments from megakaryocytes. This review explores whether platelets are unconventional cells or a novel type of extracellular vesicle, aiming to clarify their classification for advanced research.

Keywords:
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Area of Science:

  • Hematology
  • Cell Biology
  • Biophysics

Background:

  • Platelets are crucial for hemostasis and vascular integrity.
  • Megakaryocytes produce anucleate platelets, which lack genomic DNA but contain RNA and organelles.
  • The classification of platelets remains debated, with terms like cell fragments or anucleated cells used.

Purpose of the Study:

  • To explore viewpoints on whether platelets should be classified as unconventional cells or a type of extracellular vesicle.
  • To facilitate a clearer definition and classification of platelets.
  • To advance platelet research through improved conceptual integration.

Main Methods:

  • Literature review and conceptual analysis.
  • Comparison of platelet characteristics with definitions of cells and extracellular vesicles.
  • Exploration of existing scientific viewpoints and terminology.

Main Results:

  • Platelets share characteristics with both conventional cells and extracellular vesicles.
  • The anucleate nature and origin from megakaryocytes present unique classification challenges.
  • Existing terminology does not fully capture the complex nature of platelets.

Conclusions:

  • Re-evaluating platelet classification as either unconventional cells or extracellular vesicles is necessary.
  • A precise definition will enhance understanding and research in platelet biology.
  • This conceptual clarification is vital for advancing the field of platelet research.