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CD58 Expression Decreases as Nonmalignant B Cells Mature in Bone Marrow and Is Frequently Overexpressed in Adult and Pediatric Precursor B-Cell Acute Lymphoblastic Leukemia

Ronald V. Lee MD, Raul C. Braylan MD, Lisa M. Rimsza MD
DOI: http://dx.doi.org/10.1309/X5VV6FKJQ6MUBLPX 119-124 First published online: 1 January 2005

Abstract

We used flow cytometry to determine the CD58 expression on nonmalignant B cells at different stages of maturation in the bone marrow and compared it with that of blasts in adult and pediatric precursor B-cell acute lymphoblastic leukemia (B-ALL). The mean fluorescence intensity (MFI) of CD58 expression decreased significantly as nonmalignant B cells differentiated in the bone marrow from an early to a mature stage. Few nonneoplastic B cells at a mid or mature stage of development expressed CD58 MFI values comparable to those seen in leukemic cases. Early-stage nonneoplastic B-cell precursors expressed relatively higher CD58 levels, which frequently overlapped with the variable level of CD58 expression observed among leukemic blasts. As a group, however, the malignant precursor B-ALL cells showed significantly higher expression of CD58 than nonmalignant B-cell populations at any maturational stage. These findings support the potential usefulness of CD58 expression in the diagnosis and monitoring of precursor B-ALL, but only when blasts express high levels of CD58.

Key Words:
  • CD58
  • LFA-3
  • CD2 ligand
  • Precursor B cell
  • Hematogones
  • Acute lymphoblastic leukemia