Abstract
The Musashi-2 gene (MSI2) is implicated in leukemogenesis, and high MSI2 expression has been associated with decreased survival in acute myeloid leukemia (AML) and acute lymphoid leukemia (ALL), suggesting its use as a new prognostic marker. We aimed to validate the prognostic significance of MSI2 in ALL. MSI2 expression was measured by real-time polymerase chain reaction in 140 adult B-ALL patients and compared to controls. MSI2 expression level in patients was significantly higher when compared to the control group (P = 0.001). High MSI2 expression did not correlate with the clinical characteristics of patients. However, patients with high MSI2 expression had significantly lower incidence of complete remission (CR) (P = 0.03), inferior overall survival (P = 0.018), and shorter disease-free survival (P = 0.001). Multivariate analysis revealed that high MSI2 expression was an independent prognostic factor for adult BCR-ABL1-negative B-ALL patients. These results confirm the association of MSI2 expression with outcome in adult B-ALL and demonstrate the utility of MSI2 as a clinical prognostic biomarker.
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