JAK2 mutation status, hemostatic risk factors and thrombophilic factors in essential thrombocythemia (ET) patients

• Main Authors: Anna Dmoszyńska, Martyna Kandefer-Szerszeń, Anna M. Kowalska, Tomasz Gromek, Adam Walter-Croneck, Katarzyna Wejksza, Sylwia Chocholska, Ksenia Bykowska, Aleksandra Nowaczyńska, Bożena Sokołowska
• Format: Article
• Language: English
• Published: Via Medica 2011-07-01
• Series: Folia Histochemica et Cytobiologica
• Subjects: JAK2 mutation; ET; thrombophilic factors
• Online Access: http://czasopisma.viamedica.pl/fhc/article/view/4123
• ISSN: 0239-8508; 1897-5631

The recently discovered JAK2 V617F point mutation, found in 50–60% of ET patients, has been reported to be associated with a higher risk of thrombotic events. In this study, we explored if JAK2 V617F mutation, or coexisting thrombophilic and hemostatic risk factors, contributed to these complications. We examined 32 patients with ET, and looked for pathogenetic JAK2 V617F mutation and prothrombotic genes mutations: factor V Leiden, prothrombin and MTHFR. We also evaluated plasma levels of fibrinogen, factors VIII and XII, AT, protein C, protein S and serum level of homocysteine. Urokinase concentration was assessed in patients’ plasma as well as platelet lysates. There was no difference in the number of thrombotic complications between ET patients with and without JAK2 mutation. However, we found a number of thrombophilic and hemostatic risk factors that could contribute to thrombotic complications in ET patients. (Folia Histochemica et Cytobiologica 2011; Vol. 49, No. 2, pp. 267–271)