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Platelet intrinsic apoptosis.

Emma C Josefsson1

  • 1Sahlgrenska University Hospital, Department of Clinical Chemistry, Gothenburg, Sweden; The University of Gothenburg, Department of Laboratory Medicine, Institute of Biomedicine, Gothenburg, Sweden; The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade, VIC 3052, Australia; The University of Melbourne, Department of Medical Biology, 1G Royal Parade, VIC 3052, Australia.

Thrombosis Research
|February 4, 2023
PubMed
Summary
This summary is machine-generated.

Platelet lifespan is controlled by programmed cell death, known as intrinsic apoptosis, regulated by BCL-2 proteins. Understanding this process is key for maintaining functional platelets and improving storage conditions.

Keywords:
ApoptosisBCL-X(L)Cell deathLifespanMitochondriaPlatelet

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Area of Science:

  • Hematology
  • Cell Biology
  • Molecular Biology

Background:

  • Platelet lifespan is regulated by intrinsic apoptosis, a form of programmed cell death.
  • The BCL-2 protein family, including BCL-XL, BAK, and BAX, governs this process.
  • Maintaining a functional, haemostatically reactive platelet population relies on controlled platelet death.

Purpose of the Study:

  • To review the molecular regulation of intrinsic apoptosis in platelets.
  • To discuss conditions associated with increased platelet death.
  • To examine platelet storage ex vivo and methods for assessing platelet apoptosis.

Main Methods:

  • This review synthesizes current literature on platelet apoptosis.
  • It focuses on the molecular mechanisms involving BCL-2 family proteins.
  • The review also covers clinical conditions and experimental considerations.

Main Results:

  • Intrinsic apoptosis, mediated by BAK and BAX, restricts platelet lifespan.
  • BCL-XL acts as a prosurvival protein by inhibiting BAK and BAX.
  • Dysregulation of this pathway can impact platelet function and viability.

Conclusions:

  • Molecular regulation of intrinsic apoptosis is crucial for platelet homeostasis.
  • Understanding platelet death mechanisms is vital for managing conditions with altered platelet counts or function.
  • Further research into ex vivo platelet storage and apoptosis assessment is warranted.