Platelet-released phospholipids link haemostasis and angiogenesis

Denis English, Joe GN Garcia, D. N. Brindley

Research output: Contribution to journalArticle

126 Citations (Scopus)

Abstract

Considerable attention has focused on identifying mediators of neovascularization at sites of growth and abnormal tissue development. By contrast, mediators of angiogenesis at sites of injury and wound repair are not well defined but factors generated during blood coagulation (haemostasis) are attractive candidates. In addition to proteins generated, activated and released during the activation of clotting cascades, platelet-derived lipid mediators are now known to play a key role in many aspects of the angiogenic response. The first indication of lipid mediator involvement in angiogenesis was the discovery that lysophosphatidate (LPA), phosphatidic acid (PA) and sphingosine 1-phosphate (SPP) are high affinity agonists for G-protein coupled EDG (endothelial differentiation gene) receptors. The prototype for this family, EDG-1, was cloned from genes expressed when endothelial cells were activated to assume an angiogenic phenotype in vitro. The subsequent finding that SPP is a high affinity ligand for EDG-1 led Spiegel, Hla and associates (Lee et al., Science 1998;279:1552-1555) to hypothesize that platelet-released phospholipids play an important role in angiogenesis. These investigators and others demonstrated that SPP, LPA and phosphatidate (PA) induce many important endothelial cell responses associated with angiogenesis, including liberation of endothelial cells from established monolayers, chemotactic migration, proliferation, adherens junction assembly and morphogenesis into capillary-like structures. Although these studies indicated the potential involvement of platelet-derived phospholipids in angiogenesis, their physiological importance was not established. However, recent work demonstrates that >80% of the potent endothelial cell chemoattractive activity generated in human serum during clotting - an activity necessary for optimal angiogenesis - results from platelet-derived SPP. Other factors released from platelets during clotting, including LPA and PA, exert profound effects on endothelial cells that contribute unique aspects to the angiogenic response. These combined studies establish that SPP and other platelet-derived lipid mediators provide a novel link between haemostasis and angiogenesis.

Original languageEnglish (US)
Pages (from-to)588-599
Number of pages12
JournalCardiovascular Research
Volume49
Issue number3
DOIs
StatePublished - Feb 16 2001
Externally publishedYes

Fingerprint

Hemostasis
Phospholipids
Blood Platelets
Endothelial Cells
Phosphatidic Acids
Lipids
Genes
Physiologic Neovascularization
Adherens Junctions
Blood Coagulation
Morphogenesis
GTP-Binding Proteins
Research Personnel
sphingosine 1-phosphate
Ligands
Phenotype
Wounds and Injuries
Growth
Serum
Proteins

Keywords

  • Angiogenesis
  • Endothelial receptors
  • Hemostasis
  • Platelets

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

Cite this

Platelet-released phospholipids link haemostasis and angiogenesis. / English, Denis; Garcia, Joe GN; Brindley, D. N.

In: Cardiovascular Research, Vol. 49, No. 3, 16.02.2001, p. 588-599.

Research output: Contribution to journalArticle

English, Denis ; Garcia, Joe GN ; Brindley, D. N. / Platelet-released phospholipids link haemostasis and angiogenesis. In: Cardiovascular Research. 2001 ; Vol. 49, No. 3. pp. 588-599.
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