Brady A, Gibson S, Rybicki L, Hsi E, Saunthararajah Y, Sekeres MA, Tiu R, Copelan E, Kalaycio M, Sobecks R, Bates J, Advani AS. Expression of phosphorylated signal transducer and activator of transcription 5 is associated with an increased risk of death in acute myeloid leukemia.
Eur J Haematol 2012;
89:288-93. [PMID:
22725130 DOI:
10.1111/j.1600-0609.2012.01825.x]
[Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/19/2012] [Indexed: 01/05/2023]
Abstract
BACKGROUND
Constitutive activation of STAT5 (by phosphorylation) has been identified in a number of malignancies, including acute myeloid leukemia (AML).
OBJECTIVES
We investigated whether the level of phosphorylated STAT5 (pSTAT5) expression correlates with clinical outcome in AML.
METHODS
Adult patients with newly diagnosed AML receiving induction chemotherapy and with an available diagnostic bone marrow were evaluated.
RESULTS
Forty-two percent of patients had pSTAT5 expression >0 on immunohistochemical analysis of fixed bone marrow core biopsies. In multivariable analyses, controlling for age, history of antecedent hematologic disorder, cytogenetic risk, and WBC at diagnosis, pSTAT5 expression was significantly associated with an increased risk of death (HR 1.96, 95% CI 1.19-3.23, P = 0.008) and of relapse after achieving complete remission (HR 2.31, 95% CI 1.16-4.63, P = 0.018).
CONCLUSIONS
Validation of pSTAT5's prognostic value requires additional study in a larger group of uniformly treated patients. However, our data suggests that targeting this signaling pathway in AML may improve the outcome of patients.
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