title: Recombinant human granulocyte colony-stimulating factor (rhG-CSF) promotes in vitro platelet aggregation.
abstract: rhG-CSF is increasingly used for stimulation of granulopoiesis and stem cell mobilization in healthy donors for allogeneic stem cell transplantation. However, a possible association between thrombosis and rhG-CSF administration has been reported. For that reason, in this study, we investigated the effect of rhG-CSF on platelet aggregation in whole blood of 10 healthy volunteers. Three concentrations of rhG-CSF solution (1, 10 and 100 ng/ml) were prepared. Each concentration of rhG-CSF solution and a control diluent without rhG-CSF were incubated with whole blood. Incubation with rhG-CSF solutions would result in 0.1, 1.0 and 10 ng/ml rhG-CSF concentrations in the blood. After incubation, aggregation responses were evaluated with ADP (5 and 10 microM) and collagen (2 and 5 microg/ml) in whole blood. When compared to control, preincubation with all dilutions of rhG-CSF augmented aggregation of platelets induced by ADP and collagen in a statistically significant manner (p < 0.05 for all comparisons). There was also a relationship between rhG-CSF concentration (1, 10 and 100 ng/ml) and augmentation of platelet aggregation response (p < 0.0001 for 5-10 microM ADP; p < 0.0001 for 2-5 microg/ml collagen). In conclusion, this study with an in vitro model showed that rhG-CSF administration may lead to platelet hyperaggregability.
authors.affiliation: Department of Hematology, Gülhane Military Medical Academy, Ankara, Turkey. mkkaptan@hotmail.com
authors.forename: Kürsat
authors.initials: K
authors.lastname: Kaptan
authors.forename: Ahmet
authors.initials: A
authors.lastname: Ifran
authors.forename: Cengiz
authors.initials: C
authors.lastname: Beyan
authors.forename: Durdu
authors.initials: D
authors.lastname: Sertkaya
mesh_terms: D000244:Adenosine Diphosphate / Q000494:pharmacology; D000328:Adult; D002478:Cells, Cultured; D003094:Collagen / Q000494:pharmacology; D004305:Dose-Response Relationship, Drug; D016179:Granulocyte Colony-Stimulating Factor / Q000494:pharmacology*; D006801:Humans; D010974:Platelet Aggregation / Q000187:drug effects*; D011994:Recombinant Proteins
chemical_list: D011994:Recombinant Proteins; D016179:Granulocyte Colony-Stimulating Factor; D000244:Adenosine Diphosphate; D003094:Collagen