Phosphotyrosine Signaling in Platelets: Lessons for Vascular Thrombosis

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Abstract:

Platelet activation is crucial for normal hemostasis to arrest bleeding following vascular injury. However, excessive platelet activation in narrowed atherosclerotic blood vessels that are subject to high shear forces may initiate the onset of arterial thrombosis. When platelets come into contact with, and adhere to collagen exposed by damaged endothelium, they undergo morphological and functional changes necessary to generate a platelet-rich thrombus. This process is complex and involves precise co-ordination of various signaling pathways which lead to firm platelet adhesion to sites of tissue damage, release of granule contents from activated platelets, platelet shape change, platelet aggregation and subsequent thrombus formation and consolidation. Induction of tyrosine phosphorylation of key signaling molecules has emerged as a critical event central to stimulatory signaling pathways that generate platelet activation, but is an essential component associated with regulatory pathways that limit the extent of platelet activation. Understanding mechanisms that regulate platelet activation may contribute to the development of novel therapeutics that control common vascular diseases such as myocardial infarction and ischaemic stroke.





Keywords: (SHP-1); Collagen Receptor; GPIb-IX-V; ITAM motifs; Signal transduction; Src-homology 2 domain containing phosphatase-1

Document Type: Research Article

DOI: http://dx.doi.org/10.2174/138945006778559265

Affiliations: NHMRC Senior Research Fellow, Kronheimer Building, Austin Research Institute, Austin Health,Studley Road, Heidelberg, Victoria 3084, Australia.

Publication date: October 1, 2006

More about this publication?
  • Current Drug Targets aims to cover the latest and most outstanding developments on the medicinal chemistry and pharmacology of molecular drug targets e.g. disease specific proteins, receptors, enzymes, genes. Each issue of the journal will be devoted to a single timely topic, with series of in-depth reviews, written by leaders in the field, covering a range of current topics on drug targets. These issues will be organized and led by a guest editor who is a recognized expert in the overall topic. As the discovery, identification, characterisation and validation of novel human drug targets for drug discovery continues to grow; this journal will be essential reading for all pharmaceutical scientists involved in drug discovery and development.
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