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Remission maintenance in acute myeloid leukemia: impact of functional histamine H-2 receptors expressed by leukemic cells

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Author

  • Johan Aurelius
  • Anna Martner
  • Mats Brune
  • Lars Palmqvist
  • Markus Hansson
  • Kristoffer Hellstrand
  • Fredrik B. Thoren

Summary, in English

Post-consolidation immunotherapy with histamine dihydrochloride and interleukin-2 has been shown to improve leukemia-free survival in acute myeloid leukemia in a phase III trial. For this study, treatment efficacy was determined among 145 trial patients with morphological forms of acute myeloid leukemia as defined by the French-American-British classification. Leukemia-free survival was strongly improved in M4/M5 (myelomonocytic/monocytic) leukemia but not in M2 (myeloblastic) leukemia. We also analyzed histamine H-2 receptor expression by leukemic cells recovered from 26 newly diagnosed patients. H-2 receptors were typically absent from M2 cells but frequently expressed by M4/M5 cells. M4/M5 cells, but not M2 cells, produced reactive oxygen species that triggered apoptosis in adjacent natural killer cells. These events were significantly inhibited by histamine dihydrochloride. Our data demonstrate the presence of functional histamine H2 receptors on human AML cells and suggest that expression of these receptors by leukemic cells may impact on the effectiveness of histamine-based immunotherapy.

Publishing year

2012

Language

English

Pages

1904-1908

Publication/Series

Haematologica

Volume

97

Issue

12

Document type

Journal article

Publisher

Ferrata Storti Foundation

Topic

  • Hematology

Keywords

  • acute myeloid leukemia
  • remission maintenance
  • histamine H-2 receptors

Status

Published

ISBN/ISSN/Other

  • ISSN: 1592-8721