J Cancer 2021; 12(14):4257-4263. doi:10.7150/jca.53686

Research Paper

Galectin-9 and PSMB8 overexpression predict unfavorable prognosis in patients with AML

Yongping Zhang*, Song Xue*, Qi Hao, Fuhong Liu, Wenqiu Huang, Jingbo Wang

Department of Hematology, Aerospace Center Hospital, Peking University Aerospace School of Clinical Medicine, Beijing 100049, China.
*These authors contributed equally to this work.

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Zhang Y, Xue S, Hao Q, Liu F, Huang W, Wang J. Galectin-9 and PSMB8 overexpression predict unfavorable prognosis in patients with AML. J Cancer 2021; 12(14):4257-4263. doi:10.7150/jca.53686. Available from https://www.jcancer.org/v12p4257.htm

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Acute myeloid leukemia (AML) is a deadly heterogeneous hematologic malignancy. Despite the well-characterized genetic characteristics and new promising targeted therapies for AML, the clinical outcome remains suboptimal. Galectin-9 (Gal-9) is a good potential target due to its immunosuppressive capacity in inflammatory processes. In our study, we firstly performed a wide range of integrated bioinformatical approach to assess the importance of Gal-9 by analyzing the expression, potential function and prognostic impact in AML. The results indicated that Gal-9 is overexpressed in AML cells, especially when relapse after hematopoietic stem cell transplantation (HSCT) and predicts poor prognosis. Co-expression analysis showed Gal-9 has a strong positive correlation with proteasome subunit beta type-8 (PSMB8), which was also highly expressed in AML with poor prognosis, implying a synergy in cell survival, cell signaling and the development of AML. In summary, we have confirmed the overexpression of Gal-9 and its partner PSMB8 in AML and validated their importance as prognostic factors. We propose that Gal-9 and PSMB8 could be a promising molecular target for treatment of AML and may provide more combined treatment options, especially in patients with relapse after HSCT.

Keywords: acute myeloid leukemia (AML), Galectin-9 (Gal-9), bioinformatics analysis, proteasome subunit beta type-8 (PSMB8), biomarker, prognosis