Soluble P-selectin assay: importance of correct anticoagulant choice

TY - JOUR

T1 - Soluble P-selectin assay

T2 - importance of correct anticoagulant choice

AU - Kirk, G.

AU - McLaren, M.

AU - Belch, J. F.

PY - 1997

Y1 - 1997

N2 - P-selectin is stored preformed in the alpha-granules of platelets. Previous studies show ß-thromboglobulin, also stored in alpha-granules can be readily released from platelets during the processing of whole blood. This artefactual release was rectified by using combination of various anti-platelet and anticoagulant compounds placed in the collecting tube. We investigated the levels of sP-selectin from 40 volunteers, comparing two anticoagulants, tri-sodium citrate, CTAD (a mixture of sodium citrate and citric acid, theophylline, adenosine and dipyridamole) plus iloprost and serum. Iloprost, a stable prostacyclin analogue, is a potent anti-platelet agent. We found significantly lower levels of sP-selectin (P<0.0001, paired t-test) measured from blood collected into CTAD and iloprost compared to levels measured from either citrated plasma or serum. We suggest that plasma levels obtained from the blood collected into a CTAD tube containing iloprost are likely to more accurately reflect the true levels of circulating sP-selectin than those obtained when test-tube activation of platelets is allowed to continue in vitro.

AB - P-selectin is stored preformed in the alpha-granules of platelets. Previous studies show ß-thromboglobulin, also stored in alpha-granules can be readily released from platelets during the processing of whole blood. This artefactual release was rectified by using combination of various anti-platelet and anticoagulant compounds placed in the collecting tube. We investigated the levels of sP-selectin from 40 volunteers, comparing two anticoagulants, tri-sodium citrate, CTAD (a mixture of sodium citrate and citric acid, theophylline, adenosine and dipyridamole) plus iloprost and serum. Iloprost, a stable prostacyclin analogue, is a potent anti-platelet agent. We found significantly lower levels of sP-selectin (P<0.0001, paired t-test) measured from blood collected into CTAD and iloprost compared to levels measured from either citrated plasma or serum. We suggest that plasma levels obtained from the blood collected into a CTAD tube containing iloprost are likely to more accurately reflect the true levels of circulating sP-selectin than those obtained when test-tube activation of platelets is allowed to continue in vitro.

U2 - 10.1080/09537109709169332

DO - 10.1080/09537109709169332

M3 - Article

C2 - 20297938

SN - 0953-7104

VL - 8

SP - 159

EP - 162

JO - Platelets

JF - Platelets

IS - 2-3

ER -