Chromosome aberrations evaluated by comparative genomic hybridization in B-cell chronic lymphocytic leukemia: Correlation with CD38 expression

Laura Ottaggio, Silvia Viaggi, Annalisa Zunino, Simona Zupo, Edoardo Rossi, Mauro Spriano, Angelo Abbondandolo, Manlio Ferrarini

Research output: Contribution to journalArticle

Abstract

Background and Objectives. B-cell chronic lymphocytic leukemia (B-CLL) results from the accumulation of monoclonal CD5+ B cells. Despite its homogeneity at cellular level, B-CLL is clinically heterogeneous. Clinical studies indicate that CD38+ B-CLL are characterized by a more aggressive clinical course than are CD38- B-CLL. On the basis of these studies and considering the established correlation between specific chromosome aberrations and the clinical course of B-CLL, it is possible that CD38+ B-CLL cases are also characterized by specific subsets of chromosomal alterations. Design and Methods. Comparative genomic hybridization (CGH) was performed on purified B-cells from peripheral blood of 52 patients with B-CLL in order to detect chromosome imbalance. The immunophenotype of the patients, including CD38 expression, was also determined by flow cytometry. The results of CGH experiments were then compared with CD38 expression. Results. We found a clear correlation between the presence of chromosomal imbalances and CD38 expression: 13/16 CD38+ cases had chromosome imbalances, most of them (12/13) correlated with a poor prognosis. Among the CD38- B-CLL patients, only 8/36 displayed chromosome imbalances; the only three cases with loss in 13q as a single aberration, considered a good prognostic marker, were in this group. Moreover, we found that cytogenetic alterations were also more complex in the CD38+ B-CLL subset, since 9/10 with two or more aberrations were in the CD38+ group. Interpretation and Conclusions. Collectively, the data reinforce the value of CD38 as a prognostic factor and indicate that genotypic/phenotypic features distinguish B-CLL subsets.

Original languageEnglish
Pages (from-to)769-777
Number of pages9
JournalHaematologica
Volume88
Issue number7
Publication statusPublished - Jul 1 2003

    Fingerprint

Keywords

  • B-CLL
  • CD38
  • Chromosome aberrations
  • Immunophenotype
  • Molecular cytogenetics

ASJC Scopus subject areas

  • Hematology

Cite this

Ottaggio, L., Viaggi, S., Zunino, A., Zupo, S., Rossi, E., Spriano, M., Abbondandolo, A., & Ferrarini, M. (2003). Chromosome aberrations evaluated by comparative genomic hybridization in B-cell chronic lymphocytic leukemia: Correlation with CD38 expression. Haematologica, 88(7), 769-777.