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January 1, 2002Thrombosis and Haemostasis

Platelet Aggregation and Activation under Complex Patterns of Shear Stress

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Key result

Exposing platelets to a high shear stress of 100 dyn/cm2 for 2.5 seconds followed by low shear induced aggregation with significantly less CD62P expression than ADP treatment.

Population

Platelets (in vitro model of arterial stenosis)

Comparison

Exposure to a shear profile containing both high… vs Platelets treated with ADP

Design

Preclinical

Authors

JZJian-Ning ZhangBaylor College of MedicineABAngela L. BergeronMichael E. DeBakey VA Medical CenterQYQinghua YuWeifang Medical University

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Overview

Questions prolonged high-shear in vitro platelet assays for arterial stenosis; leaves open the thrombotic contribution of post-stenotic low flow.

Structured PICO

P
Population
Platelets (in vitro model of arterial stenosis)
I
Intervention
Exposure to a shear profile containing both high (100 dyn/cm2 for 2.5 s) and low shear segments
C
Comparator
Platelets treated with ADP (for activation comparison)
O
Outcome
Platelet aggregation and activation (CD62P expression)surrogate

Post-stenosis low flow enhances shear-induced platelet aggregation, which appears to be a mechanical crosslinking process requiring minimal platelet activation.

Cite This Study

Zhang et al. (2002) studied this question. Complex pattern of shear stress (high shear followed by low shear) vs. ADP treatment was evaluated on Platelet aggregation and CD62P expression. Exposing platelets to a high shear stress of 100 dyn/cm2 for 2.5 seconds followed by low shear induced aggregation with significantly less CD62P expression than ADP treatment.

synapsesocial.com/papers/6a6d6a35f44fa9f079dbaaaehttps://doi.org/10.1055/s-0037-1613308
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1A Scaling Law for Wall Shear Rate Through an Arterial Stenosis1994 · 103 citations
  2. 2Enhanced Shear-Induced Platelet Aggregation in Acute Myocardial Infarction1999 · 108 citations
  3. 3Ristocetin-dependent, but not botrocetin-dependent, binding of von Willebrand factor to the platelet glycoprotein Ib-IX-V complex correlates with shear-dependent interactions2001 · 137 citations
  4. 4Shear-induced platelet aggregation can be mediated by vWF released from platelets, as well as by exogenous large or unusually large vWF multimers, requires adenosine diphosphate, and is resistant to aspirin1988 · 365 citations
  5. 5Shear-Induced Platelet Aggregation in Normal Subjects and Stroke Patients1995 · 109 citations