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Recent reports state that C-type lectin-like molecule-1 (CLL-1) in acute myeloid leukemia (AML) is expressed primarily on myeloid cells, but there is still no investigation about its prognostic significance on leukemic blast compartment. Hence, this study aimed to evaluate the prognostic value of CLL-1 in 123 patients with de novo CD34 + Non-M3 AML. Multiparameter flow cytometry was used to assess the expression of CLL-1 on immature compartment in AML and control groups. We found that CLL-1 expression level on blast compartment was closely linked to clinical characteristics, treatment response, and survival outcome of patients. Decreased expression of CLL-1 was observed on immature compartment from AML patients as compared with controls (62.6% vs. 86.5%, P &lt; 0.05). Logistic model exhibited that CLL-1 low independently predicted low complete remission rate with an odds ratio of 4.57 (2.53-6.61, P &lt; 0.05). Additionally, CLL-1 expression level at diagnosis was inversely correlated to the residual blast cells (residual leukemia cell) after induction chemotherapy (r = -0.423, P &lt; 0.05). Furthermore, multivariate Cox regression model demonstrated that CLL-1 low was still an independent adverse predictor (P &lt; 0.05 for event-free survival, P &lt; 0.05 for overall survival). Notably, CLL-1 low was able to discriminate poor survival patients from intermediate- and favorable-risk groups. Taken together, CLL-1 is a novel prognostic predictor that could be exploited to supplement the current AML prognostic risk stratification system, and potentially optimize the clinical management of AML.

Low CLL-1 Expression Is a Novel Adverse Predictor in 123 Patients with De Novo CD34+ Acute Myeloid Leukemia

Low CLL-1 Expression Is a Novel Adverse Predictor in 123 Patients with De Novo CD34⁺ Acute Myeloid Leukemia