Blood Res.  2018 Sep;53(3):198-204. 10.5045/br.2018.53.3.198.

The prognostic impact of lymphocyte subsets in newly diagnosed acute myeloid leukemia

Affiliations
  • 1Department of Laboratory Medicine, Chungnam National University Hospital, Daejeon, Korea. jmkim@cnuh.co.kr
  • 2Department of Hemato-Oncology, Chungnam National University Hospital, Daejeon, Korea.

Abstract

BACKGROUND
Tumor-infiltrating lymphocytes, which form a part of the host immune system, affect the development and progression of cancer. This study investigated whether subsets of lymphocytes reflecting host-tumor immunologic interactions are related to the prognosis of patients with acute myeloid leukemia (AML).
METHODS
Lymphocyte subsets in the peripheral blood of 88 patients who were newly diagnosed with AML were analyzed by quantitative flow cytometry. The relationships of lymphocyte subsets with AML subtypes, genetic risk, and clinical courses were analyzed.
RESULTS
The percentages of T and NK cells differed between patients with acute promyelocytic leukemia (APL) and those with AML with myelodysplasia-related changes. In non-APL, a high proportion of NK cells (>16.6%) was associated with a higher rate of death before remission (P=0.0438), whereas a low proportion of NK cells (≤9.4%) was associated with higher rates of adverse genetic abnormalities (P=0.0244) and relapse (P=0.0567). A multivariate analysis showed that the lymphocyte subsets were not independent predictors of survival.
CONCLUSION
Lymphocyte subsets at diagnosis differ between patients with different specific subtypes of AML. A low proportion of NK cells is associated with adverse genetic abnormalities, whereas a high proportion is related to death before remission. However, the proportion of NK cells may not show independent correlations with survival.

Keyword

Acute myeloid leukemia; Lymphocyte subset; NK cells; Prognosis

MeSH Terms

Diagnosis
Flow Cytometry
Humans
Immune System
Killer Cells, Natural
Leukemia, Myeloid, Acute*
Leukemia, Promyelocytic, Acute
Lymphocyte Subsets*
Lymphocytes*
Lymphocytes, Tumor-Infiltrating
Multivariate Analysis
Prognosis
Recurrence

Figure

  • Fig. 1 Correlation between bone marrow blast percentage and NK cell percentage.

  • Fig. 2 Kaplan-Meier plots of disease free survival (A) and overall survival (B) in the subgroups according to the NK cell percentages.


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