, Volume 90, Issue 8, pp 939-946
Date: 18 Feb 2011

Differential expression of JAK2 and Src kinase genes in response to hydroxyurea treatment in polycythemia vera and essential thrombocythemia

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This study investigates the differential gene expression profile of JAK2V617F-positive myeloproliferative neoplasm (MPN) patients, with and without response to hydroxyurea (HU) treatment. Twenty-one polycythemia vera, 28 essential thrombocythemia, eight secondary erythrocytosis, and 30 controls were studied. Thirty-four genes were overexpressed in patients who did not respond to HU. Of these, some participate in proliferative pathways: MAPK, AKT, Src kinase (SFK), and JAK2 pathway. JAK2 allele burden was similar between groups of responders and nonresponder. A molecular fingerprint distinguishes JAK2V617F-positive MPN patients without response to HU treatment, with overexpression of JAK2, MAPK14, PIK3CA, and SFK genes.