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Higher Level of Peripheral Blood CD34 Positive Cells Presented with Unfavorable Prognosis in Intermediate-Low Risk Acute Promyelocytic Leukemia

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Indian Journal of Hematology and Blood Transfusion Aims and scope Submit manuscript

Abstract

Our previous work has demonstrated that some acute promyelocytic leukemia (APL) patients had significantly elevated circulating CD34+ cell count (≥ 10 × 106/L), and these patients with higher CD34+ cell level usually presented with high-risk disease (WBC > 10,000/μL). The aim of this study was to investigate whether circulating CD34+ cell count is a prognostic marker in intermediate-low risk APL patients. In this study, 76 intermediate-low risk APL patients and 56 age-adjusted healthy volunteers were evaluated. Enumeration of CD34+ cells was investigated before the treatment. A cut-off value of 10 × 106/L CD34+ cells could just distinguish APL patients with adverse prognostic factors from others and may have the power to predict shorter progression-free survival (PFS) and poor prognosis. Higher count of CD34+ cells was usually associated with nonclassical chromosomal translocation, PML/RARα gene complex fusion, APL history, chemotherapy-related APL, disease progression, second tumor, extramedullary infiltration, FLT3-ITD positive mutation, atypical morphology, BM promyelocyte CD56/CD34 positive expression, myelofibrosis, PCR-positive PML/RARa gene fusion but FISH-negative, marrow necrosis and shorter PFS. Our results suggest that the level of CD34+ cells can be further the stratification of disease risk, a higher CD34+ cell count may be indicative of inferior survival and serve as an adverse biomarker for intermediate-low risk APL.

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Abbreviations

APL:

Acute promyelocytic leukemia

PFS:

Progression-free survival

OS:

Overall survival

ATRA:

All-transretinoic acid

CR:

Complete remission

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Correspondence to Hui Zeng.

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The study protocol received institutional review board approval and that the participants provided informed consent. All patient’s personal data have been secured.

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Cuiling Zhang and Haibo Dong are co-first author.

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Zhang, C., Dong, H., Lin, Y. et al. Higher Level of Peripheral Blood CD34 Positive Cells Presented with Unfavorable Prognosis in Intermediate-Low Risk Acute Promyelocytic Leukemia. Indian J Hematol Blood Transfus 36, 309–315 (2020). https://doi.org/10.1007/s12288-019-01232-4

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