Cited by 317Platelet Disorders and TreatmentsChemokine receptors and signalingBlood Coagulation and Thrombosis Mechanisms

Platelet chemokines and chemokine receptors, linking hemostasis, inflammation, and host defense

GEAR, ADRIAN R.L., CAMERINI, DAVID·2003·Microcirculation

Abstract

Blood platelets play critical roles in hemostasis, providing rapid essential protection against bleeding and catalyzing the important slower formation of stable blood clots via the coagulation cascade. They are also involved in protection from infection by phagocytosis of pathogens and by secreting chemokines that attract leukocytes. Platelet function usually is activated by primary agonists such as adenosine diphosphate (ADP), thrombin, and collagen, whereas secondary agonists like adrenalin do not induce aggregation on their own but become highly effective in the presence of low levels of primary agonists. Current research has revealed that chemokines represent an important additional class of agonists capable of causing significant activation of platelet function. Early work on platelet alpha-granule proteins suggested that platelet factor 4, now known as CXCL4, modulated aggregation and secretion induced by low agonist levels. Subsequent reports revealed the presence in platelets of messenger RNA for several additional chemokines and chemokine receptors. Three chemokines in particular, CXCL12 (SDF-1), CCL17 (TARC), and CCL22 (MDC), recently have been shown to be strong and rapid activators of platelet aggregation and adhesion after their binding to platelet CXCR4 or CCR4, when acting in combination with low levels of primary agonists. CXCL12 can be secreted by endothelial cells and is present in atherosclerotic plaques, whereas CCL17 and CCL22 are secreted by monocytes and macrophages. Platelet activation leads to the release of alpha-granule chemokines, including CCL3 (MIP-1alpha), CCL5 (RANTES), CCL7 (MCP-3), CCL17, CXCL1 (growth-regulated oncogene-alpha), CXCL5 (ENA-78), and CXCL8 (IL-8), which attract leukocytes and further activate other platelets. These findings help to provide a direct linkage between hemostasis, infection, and inflammation and the development of atherosclerosis.

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Registry

Crossref · 10.1038/sj.mn.7800198

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  • Activated platelets can release PDGF, VEGF, and IL-8.

    “Consequent to vascular damage, activated platelets can also release an array of cellular growth factors and angiogenic factors such as PDGF and VEGF, as well as inflammatory mediators such as IL-8 [79,80,81].”

    From The Pathogenesis of Adenomyosis vis-à-vis Endometriosis (2020) · cites this paper as [80]

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Authors
GEAR, A. R. L., & CAMERINI, D.
Affiliations
University of Virginia (US)
Corresponding author
GEAR, ADRIAN R.L.
Venue
Microcirculation
Publisher
Wiley
Published
2003-07
Volume
10
Issue
3-4
Pages
335-350
ISSN
  • 1073-9688 (ISSN-L)
  • 1549-8719
OpenAlex
W2001798594
Cited by
317
References
161
Citations by year
2026: 4 · 2025: 4 · 2024: 10 · 2023: 4 · 2022: 10 · 2021: 13 · 2020: 13 · 2019: 7 · 2018: 10 · 2017: 13 · 2016: 17 · 2015: 28 · 2014: 18 · 2013: 6 · 2012: 21
FWCI
2.80
Type
journal article
Language
en
Open access
closed
Locations
  • Microcirculation (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (1r29ai039943-01a1)
  • National Institute of Allergy and Infectious Diseases (AI 39943)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK59004)
Topics
  • Health Sciences › Medicine › Hematology › Platelet Disorders and Treatments
  • Health Sciences › Medicine › Oncology › Chemokine receptors and signaling
  • Health Sciences › Medicine › Hematology › Blood Coagulation and Thrombosis Mechanisms
Keywords
chemokine receptors, platelet activation, platelet aggregation, hemostasis, inflammation, host defense, CXCL12, CCL17, CCL22, CXCR4, CCR4, alpha-granule proteins, atherosclerosis, leukocyte recruitment, platelet factor 4, CCL3, RANTES, CCL7, interleukin-8
MeSH terms
Blood Platelets, Hemostasis, Humans, Immunity, Inflammation, Chemokines, Receptors, Chemokine

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