Increased response to arachidonic acid and U-46619 and resistance to inhibitory prostaglandins in patients with chronic myeloproliferative disorders.

Abstract:

:In patients with myeloproliferative disorders (MPD) a group of related diseases of the bone marrow stem cell and recurrent haemorrhagic and/or thrombotic complications, the production of aggregating prostaglandins (PGs) may be normal or slightly reduced, while PGI2 production is normal. However, MPD platelet sensitivity to antiaggregatory PGs is still unknown. We studied the potency of PGD2, PGI2 and PGE1 as inhibitors of platelet aggregation induced by threshold aggregating concentrations of arachidonic acid and U-46619-analogue of the cyclic endoperoxide PGH2 in 20 patients with MPD in comparison with healthy controls, with the aim of evaluating the sensitivity of MPD platelets to antiaggregatory PGs. In these patients platelet prostanoid metabolism was normal. However, the functional response of platelets to aggregating and antiaggregating prostanoids was shifted towards potentially increased platelet aggregation response. These findings could have a clinical relevance in view of the haemostatic and thrombotic complications so frequent in MPD.

journal_name

Thromb Haemost

authors

Cortelazzo S,Galli M,Castagna D,Viero P,de Gaetano G,Barbui T

subject

Has Abstract

pub_date

1988-02-25 00:00:00

pages

73-6

issue

1

eissn

0340-6245

issn

2567-689X

journal_volume

59

pub_type

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