Flow cytometric analysis of lymphoid enhancer-binding factor 1 in diagnosis of chronic lymphocytic leukemia/small lymphocytic lymphoma

Catalina Amador-Ortiz, Charles L. Goolsby, Loann C. Peterson, Kristy L. Wolniak, Janet L. McLaughlin, Juehua Gao, Yi Hua Chen*

*Corresponding author for this work

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

Objectives: Nuclear overexpression of lymphoid enhancerbinding factor 1 (LEF1) assessed by immunohistochemistry has been shown to be highly associated with chronic lymphocytic leukemia/small lymphocytic lymphoma (CLL/SLL) among small B-cell lymphomas. The purpose of this study was to evaluate the utility of flow cytometric analysis of LEF1 in the diagnosis of CLL/SLL. Methods: Normal peripheral blood was used to validate the test. Flow cytometric analysis of LEF1 was performed in 64 patient samples qualitatively and quantitatively by comparing the staining intensity and the ratios of the median fluorescence intensities (MFIs) of LEF1 in B cells of interest to the internal reference cell populations. The results were correlated with the pathologic diagnosis. Results: Proper sample processing ensured sufficient separation of positive LEF1 staining in T cells from negative staining in normal B and natural killer (NK) cells. Qualitative analysis of patient samples showed that all 25 cases of CLL/SLL but none of the other small B-cell lymphomas were positive for LEF1. Using a B/NK MFI ratio of 1.5 and B/T MFI ratio of 0.45 separated CLL/SLL cases from non-CLL lymphomas. Conclusions: Flow cytometric analysis of LEF1 is sufficient to differentiate CLL/SLL from other small B-cell lymphomas and may serve as a useful tool in the diagnosis of CLL/SLL.

Original languageEnglish (US)
Pages (from-to)214-222
Number of pages9
JournalAmerican journal of clinical pathology
Volume143
Issue number2
DOIs
StatePublished - Feb 1 2015

Keywords

  • Chronic lymphocytic leukemia/small lymphocytic lymphoma (CLL/SLL)
  • Flow cytometry
  • LEF1

ASJC Scopus subject areas

  • Pathology and Forensic Medicine

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