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CD34 expression on platelets.

Kristine Lewandowska1, David Kaplan, William Husel

  • 1Department of Pathology, Case Western Reserve University, Biomedical Research Building, Room 926, 10900 Euclid Avenue, Cleveland, OH 44106-4943, USA.

Platelets
|May 15, 2003
PubMed
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Human platelets express CD34, a molecule typically found on hematopoietic progenitor cells. Platelet activation significantly reduces surface CD34, impacting platelet function and cell determination.

Area of Science:

  • Hematology
  • Immunology
  • Cell Biology

Background:

  • CD34 is a well-established marker for hematopoietic progenitor cells.
  • The presence and function of CD34 on non-hematopoietic cells, like platelets, are less understood.

Purpose of the Study:

  • To investigate the expression of CD34 on human platelets.
  • To characterize the nature of CD34 expressed on platelets.
  • To determine the effect of platelet activation on CD34 expression.

Main Methods:

  • High-resolution immunophenotyping using flow cytometry and enzymatic amplification staining.
  • Assessment with five different monoclonal antibodies targeting CD34 epitopes.
  • Verification of expression using immunoblotting.

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Main Results:

  • Human platelets express CD34.
  • Platelet CD34 appears to be a unique glycoform.
  • Platelet activation leads to a significant decrease in surface CD34 expression.
  • CD34 expression on platelets was confirmed by immunoblotting.

Conclusions:

  • Platelets express a unique form of CD34.
  • CD34 expression on platelets has implications for platelet function.
  • Understanding platelet CD34 may aid in distinguishing them from hematopoietic progenitor cells.