title: Plasma levels of JAK2 mRNA in patients with chronic myeloproliferative diseases with and without V617F mutation: implications for prognosis and disease biology.
abstract: The association of V617F JAK2 expression levels with disease behavior has not been studied in patients with nonchronic myelogenous leukemia (CML) myeloproliferative disease (MPD). We found plasma levels of total JAK2 mRNA to be higher in patients with non-CML MPD (n=175) than in CML patients (n=45) and normal controls (n=58) (each P<0.001). Overall survival was studied in 68 patients and showed positive correlation with levels of total and mutant JAK2 mRNA in patients with the V617F mutation, but not those without the mutation. These findings suggest that total JAK2 expression levels play a role in the biology of the disease in V617F-positive patients, and a therapy aiming at downmodulating the expression of the total JAK2 mRNA should be considered. In conclusion, we studied JAK2 total and V6217F mutant mRNA levels in plasma. We show high levels of JAK2 expression in MPD patients and these levels correlate with survival.
authors.affiliation: Haematopathology Department, Quest Diagnostics Nichols Institute, San Juan Capistrano, CA 92675, USA.
authors.forename: W
authors.initials: W
authors.lastname: Ma
authors.forename: H
authors.initials: H
authors.lastname: Kantarjian
authors.forename: X
authors.initials: X
authors.lastname: Zhang
authors.forename: C-H
authors.initials: CH
authors.lastname: Yeh
authors.forename: Z J
authors.initials: ZJ
authors.lastname: Zhang
authors.forename: S
authors.initials: S
authors.lastname: Verstovsek
authors.forename: S
authors.initials: S
authors.lastname: O'Brien
authors.forename: F
authors.initials: F
authors.lastname: Giles
authors.forename: M
authors.initials: M
authors.lastname: Albitar
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D018572:Disease-Free Survival; D005260:Female; D006801:Humans; D053614:Janus Kinase 2 / Q000097:blood* / Q000235:genetics / Q000378:metabolism; D008297:Male; D008875:Middle Aged; D009154:Mutation / Q000235:genetics*; D009196:Myeloproliferative Disorders / Q000097:blood* / Q000175:diagnosis / Q000235:genetics; D011379:Prognosis; D012333:RNA, Messenger / Q000097:blood
chemical_list: D012333:RNA, Messenger; D053614:Janus Kinase 2