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Dysregulation of NKD1 has been identified in several solid tumors. However, the status of NKD1 expression and its clinical implication in acute myeloid leukemia remain largely elusive. NKD1 transcript level in bone marrow mononuclear cells was detected by real-time quantitative polymerase chain reaction in 126 de novo acute myeloid leukemia patients and 30 controls. Clinical significance of NKD1 expression was obtained by the comparison between the patients with low and high NKD1 expression. NKD1 messenger RNA level was significantly decreased in acute myeloid leukemia patients compared with controls ( p = 0.019). There were no significant differences between patients with low and high NKD1 expression in sex, age, peripheral blood cells, bone marrow blasts, French–American–British/World Health Organization subtypes, and karyotypes/karyotypic classifications ( p &gt; 0.05). Although no significant difference was observed in complete remission rate between NKD1 low  and NKD1 high  patients ( p &gt; 0.05), Kaplan–Meier analysis revealed that NKD1 low  patients showed shorter overall survival time than NKD1 high  patients in whole-cohort acute myeloid leukemia, non-M3 acute myeloid leukemia, and cytogenetically normal acute myeloid leukemia ( p = 0.014, 0.063, and 0.020). Multivariate analyses disclosed the low NKD1 expression was an independent risk factor in cytogenetically normal acute myeloid leukemia patients (hazard ratio = 0.397, p = 0.017). Moreover, the prognostic value of NKD1 expression was confirmed by gene expression profile data in cytogenetically normal acute myeloid leukemia patients ( p = 0.028 and 0.011). NKD1 showed significantly increased level after induction chemotherapy achieved complete remission in follow-up paired acute myeloid leukemia patients ( p &lt; 0.001). These findings indicated that reduced NKD1 expression is associated with unfavorable clinical outcome in cytogenetically normal acute myeloid leukemia.

Low NKD1 expression predicts adverse prognosis in cytogenetically normal acute myeloid leukemia