Lymphotoxin β expression is high in chronic lymphocytic leukemia but low in small lymphocytic lymphoma: A quantitative real-time reverse transcriptase polymerase chain reaction analysis

Bálint Nagy, Anna Ferrer, Marcelo L. Larramendy, Sara Galimberti, Yan Aalto, Silvia Casas, Juhani Vilpo, Tapani Ruutu, Kim Vettenranta, Kaarle Franssila, Sakari Knuutila

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Background and Objectives. The lymphotoxin β (LTB) gene, localized to the major histocompatibility complex region on chromosome 6p21.3, has an important role in the formation of germinal center reactions and regulation of immune response and apoptosis. Our aim was to determine LTB gene expression in different hematologic neoplasias. Design and Methods. We determined the expression of LTB using quantitative real-time reverse transcriptase polymerase chain reaction (RT-PCR) on a series of RNA samples from CD3+ T cells and CD19+ B cells isolated from peripheral blood (n=7); CD19+ B cells isolated from lymph nodes (n=11) and from patients with acute lymphoblastic leukemia (ALL; n=16), acute myeloid leukemia (AML; n=43), chronic myeloid leukemia (CML; n=12), mantle cell lymphoma (MCL; n=19), chronic lymphocytic leukemia (CLL; n=32) and small lymphocytic lymphoma (SLL; n=22). Results. The expression level of LTB in CD3+ T cells and CD19+ B cells isolated from blood was ten to forty times lower than that in normal CD19+ B cells isolated from lymph nodes. In malignant myeloid cells the expression levels were very low, whereas in malignant lymphoid cells the expression was higher than in myeloid cells, being highest in MCL and CLL (20.2±14.0 ng/μL and 81.0±116.3 ng/μL) and low in SLL (4.5±3.6 ng/μL; p=0.001). We did not find correlations between LTB expression and hematoclinical parameters (risk groups, immunophenotypes and overall survival). Interpretation and Conclusions. A distinct difference in expression of LTB in CLL and SLL indicates that these morphologically similar B-cell malignancies are molecularly different. Further studies are needed to investigate the prognostic value of LTB and any role that LTB may have in determining whether the malignant B cells manifest a leukemia or lymphoma.

Original languageEnglish
Pages (from-to)654-658
Number of pages5
JournalHaematologica
Volume88
Issue number6
Publication statusPublished - Jun 1 2003

Keywords

  • Gene expression
  • Hematologic neoplasia
  • Lymphotoxin β

ASJC Scopus subject areas

  • Hematology

Fingerprint Dive into the research topics of 'Lymphotoxin β expression is high in chronic lymphocytic leukemia but low in small lymphocytic lymphoma: A quantitative real-time reverse transcriptase polymerase chain reaction analysis'. Together they form a unique fingerprint.

  • Cite this

    Nagy, B., Ferrer, A., Larramendy, M. L., Galimberti, S., Aalto, Y., Casas, S., Vilpo, J., Ruutu, T., Vettenranta, K., Franssila, K., & Knuutila, S. (2003). Lymphotoxin β expression is high in chronic lymphocytic leukemia but low in small lymphocytic lymphoma: A quantitative real-time reverse transcriptase polymerase chain reaction analysis. Haematologica, 88(6), 654-658.