Background and Objective. Shear-stress is considered to be the first event of platelet aggregation in vivo and platelet adhesion may be enhanced under pathologic conditions (e.g. arterial occlusion). Design and Methods. We wanted to test the effect of adenosine derivatives on platelet aggregation induced by shear-stress. By increasing platelet cAMP adenosine derivatives inhibit platelet activation. This in turn leads to P-selectin (CD62P) exposure, which is known to play a fundamental role in the binding of platelets to leukocytes. This gives rise to thrembus formation. Results. The levels of cAMP (pmol/mL) prior to and after treating blood with the following compounds were respectively: PGE1 4.67±0.29, 9.33±0.58; SP64 5.2±0.34, 6.83±0.52; 2-Cl-adenosine 5.83± 0.58, 7.45±0.55; NECA 7.00±2.29, 8.00±1.76. Interpretation and Conclusions. High shear rate was studied using a filteraggregometer which could be a good test for analyzing what happens under physiologic conditions compared to other systems in which platelet aggregation only occurs after adding aggregating agents (Born aggregometer).
|Number of pages||5|
|Publication status||Published - Aug 1999|
- Adenosine derivatives
- Cyclic adenosine monophosphate
- Von Willebrand's factor
ASJC Scopus subject areas