title: Desmopressin antagonizes the in vitro platelet dysfunction induced by GPIIb/IIIa inhibitors and aspirin.
abstract: Whereas bleeding is the most frequent adverse event encountered in patients receiving glycoprotein (GP) IIb/IIIa inhibitors, there are currently no recommendations for how to treat such patients. The present study tested the hypothesis that infusion of desmopressin (DDAVP) reverses the in vitro platelet dysfunction induced by GPIIb/IIIa inhibitors (+l-aspirin). Study group 1 (10 healthy volunteers) received a DDAVP infusion to establish dose-response curves for the in vitro inhibition of platelet function by eptifibatide, abciximab, and tirofiban together with l-aspirin before and after DDAVP. In a randomized, double-blind, placebo-controlled, crossover study (group 2) volunteers received l-aspirin and a standard eptifibatide infusion. Thereafter, DDAVP or a physiologic saline infusion was given over 30 minutes. In group 1, all GPIIb/IIIa inhibitors prolonged collagen-epinephrine (CEPI) and collagen-adenosine diphosphate (CADP) closure times (CTs), measured with the platelet function analyzer 100 (PFA-100). DDAVP caused a shift in the concentration response curves to the right of all 3 GPIIb/IIIa inhibitors. In group 2, DDAVP accelerated the normalization of CADP-CT and CEPI-CT after the stop of eptifibatide infusion with a maximum effect at 1.5 hours to 2 hours. In contrast, CEPI-CT remained above normal in the placebo group for more than 4 hours. In conclusion, DDAVP accelerates normalization of the in vitro platelet dysfunction induced by GPIIb/IIIa inhibitors (+l-aspirin).
authors.affiliation: Department of Clinical Pharmacology, University of Vienna, Währinger Gürtel 18-20, A-1090 Vienna, Austria.
authors.forename: Rosemarie A
authors.initials: RA
authors.lastname: Reiter
authors.forename: Florian
authors.initials: F
authors.lastname: Mayr
authors.forename: Hannes
authors.initials: H
authors.lastname: Blazicek
authors.forename: Elisabeth
authors.initials: E
authors.lastname: Galehr
authors.forename: Petra
authors.initials: P
authors.lastname: Jilma-Stohlawetz
authors.forename: Hans
authors.initials: H
authors.lastname: Domanovits
authors.forename: Bernd
authors.initials: B
authors.lastname: Jilma
mesh_terms: D000077284:Abciximab; D000244:Adenosine Diphosphate / Q000494:pharmacology; D000328:Adult; D000911:Antibodies, Monoclonal / Q000494:pharmacology; D001241:Aspirin / Q000037:antagonists & inhibitors* / Q000494:pharmacology; D003094:Collagen / Q000494:pharmacology; D018592:Cross-Over Studies; D003894:Deamino Arginine Vasopressin / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D004311:Double-Blind Method; D004837:Epinephrine / Q000494:pharmacology; D000077542:Eptifibatide; D006801:Humans; D007140:Immunoglobulin Fab Fragments / Q000494:pharmacology; D008297:Male; D010455:Peptides / Q000494:pharmacology; D010974:Platelet Aggregation / Q000187:drug effects*; D010975:Platelet Aggregation Inhibitors / Q000494:pharmacology*; D019039:Platelet Glycoprotein GPIIb-IIIa Complex / Q000037:antagonists & inhibitors*; D000077466:Tirofiban; D014443:Tyrosine / Q000031:analogs & derivatives* / Q000494:pharmacology
chemical_list: D000911:Antibodies, Monoclonal; D007140:Immunoglobulin Fab Fragments; D010455:Peptides; D010975:Platelet Aggregation Inhibitors; D019039:Platelet Glycoprotein GPIIb-IIIa Complex; D014443:Tyrosine; D000244:Adenosine Diphosphate; D003094:Collagen; D003894:Deamino Arginine Vasopressin; D000077466:Tirofiban; D000077542:Eptifibatide; D001241:Aspirin; D000077284:Abciximab; D004837:Epinephrine