CD Markers

Topic Completed: 1 January 2011

Minor changes: 2 October 2020

Copyright: 2002-2021,, Inc.

PubMed Search: CD39 [title]

Nat Pernick, M.D.
Page views in 2020: 172
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Cite this page: Pernick N. CD39. website. Accessed January 15th, 2021.
Definition / general
  • Endothelial ATPase that blocks platelet activation
  • Also called ectonucleoside triphosphate diphosphohydrolase (NTPDase-1)
  • Plasma membrane-bound enzyme that hydrolyzes extracellular ATP and ADP to AMP (Platelets 2005;16:159), and acts as important inhibitor of platelet activation by blocking platelet aggregation responses to ADP
  • Also degrades the extracellular ATP released during tissue injury, which otherwise would trigger inflammation
  • Highly expressed on regulatory Foxp3(+) CD4 T cells
  • May have a therapeutic anti-thrombotic effect (Semin Thromb Hemost 2005;31:234)
  • Its biochemical activity is lost at sites of acute vascular injury, such as in ischemia reperfusion and immune graft rejection (Blood Cells Mol Dis 2006;36:217)
  • Also regulates vascular and immune cell adhesion and signaling events pivotal in inflammation (Biochem J 2006;396:23)
Clinical features
Uses by pathologists
  • No significant clinical use by pathologists
Microscopic (histologic) images

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Donor liver

Positive staining - normal
Additional references
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