Increased soluble form of P-selectin in patients with unstable angina

Circulation
H IkedaT Imaizumi

Abstract

P-selectin in platelets and endothelial cells mediates adhesive interaction with leukocytes to form thrombi. The purpose of the present study was to investigate the plasma levels of P-selectin in patients with unstable angina and in those with stable effort angina of different pathophysiologies. Plasma P-selectin levels were determined by a monoclonal antibody-based enzyme immunoassay on plasma samples taken from 12 patients with unstable angina, 11 patients with stable effort angina, and 15 healthy volunteers. Patients with unstable angina had angina at rest associated with ECG changes. In patients with unstable angina, plasma P-selectin levels within 1 hour (361 +/- 90 ng/mL) and at 3 hours (282 +/- 56 ng/mL) after angina were significantly (P < .05) higher than those in volunteers (177 +/- 31 ng/mL). Plasma P-selectin levels at 5 hours after attack (242 +/- 46 ng/mL) did not differ from those in volunteers. Although patients with stable effort angina developed angina with ST-segment depressions by treadmill exercise, their plasma P-selectin levels did not change (before, 178 +/- 45; immediately after, 186 +/- 36; and 1 hour after the exercise, 179 +/- 34 ng/mL). Plasma P-selectin levels after angina increased significantly i...Continue Reading

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