Annals of Hematology

, Volume 84, Issue 6, pp 368–375

Microsatellite instability is not an uncommon finding in adult de novo acute myeloid leukemia

  • Josep F. Nomdedéu
  • Granada Perea
  • Camino Estivill
  • Adriana Lasa
  • Maria J. Carnicer
  • Salut Brunet
  • Anna Aventín
  • Jorge Sierra
Original Article

DOI: 10.1007/s00277-005-1035-3

Cite this article as:
Nomdedéu, J.F., Perea, G., Estivill, C. et al. Ann Hematol (2005) 84: 368. doi:10.1007/s00277-005-1035-3

Abstract

To investigate the biologic relevance of microsatellite instability (MSI) in de novo acute myeloid leukemia (AML), 102 consecutive adult patients were analyzed by using a panel of seven microsatellites (BAT25, BAT26, D13S1267, D13S174, D2S123, D5S346 and Mdf15). Frame-shift mutations in the repetitive sequences in the coding region of MSH3, MSH6, BAX, TGFBRII and IGFRII were also investigated by using a fluorescent PCR-based assay. Methylation-specific PCR was used to determine the methylation status of hMLH1 in MSI+ cases. MSH3, MSH6 and MLH1 expression was also analyzed in 68 cases by means of real-time quantitative PCR. MSI was detected in 20 cases: 14 cases had MSI-high (instability of at least two microsatellite markers) and 6 cases corresponded to MSI-low (a single polymorphic marker with instability). Six MSI+ cases showed an associated MLL rearrangement (p=0.002). No single case showed a mutation in the repetitive sequences of the MSH3, MSH6, BAX, TGFBRII and IGFRII genes. Most samples displayed low mRNA levels of the repair genes. hMLH1 promoter was hypermethylated in five MSI+ cases. Overall survival analysis revealed no adverse effect of MSI positivity. These results suggest that MSI may be a common biologic finding in de novo AML.

Keywords

LeukemiaMicrosatellite instabilityCancer genetics

Copyright information

© Springer-Verlag 2005

Authors and Affiliations

  • Josep F. Nomdedéu
    • 1
  • Granada Perea
    • 1
  • Camino Estivill
    • 1
  • Adriana Lasa
    • 1
  • Maria J. Carnicer
    • 1
  • Salut Brunet
    • 1
  • Anna Aventín
    • 1
  • Jorge Sierra
    • 1
  1. 1.Department of Hematology, Hospital de la Santa Creu i Sant PauUniversitat Autònoma de BarcelonaBarcelonaSpain