Human Genetics

, Volume 108, Issue 4, pp 304–309

Mutation analysis of the origin recognition complex subunit 5 (ORC5L) gene in adult patients with myeloid leukemias exhibiting deletions of chromosome band 7q22

  • Stefan Fröhling
  • Kazuhiko Nakabayashi
  • Stephen Scherer
  • Hartmut Döhner
  • Konstanze Döhner
Original Investigation

DOI: 10.1007/s004390100498

Cite this article as:
Fröhling, S., Nakabayashi, K., Scherer, S. et al. Hum Genet (2001) 108: 304. doi:10.1007/s004390100498

Abstract.

The ORC5L gene encoding a subunit of the human origin recognition complex (ORC) maps to chromosome band 7q22, a region frequently deleted in adult acute myeloid leukemia (AML) and myelodysplastic syndrome (MDS). Because of its localization within a region that is commonly deleted in patients with myeloid malignancies and because of the implication of its protein product in cell cycle control (DNA replication) and regulation of gene expression (transcriptional silencing), ORC5L appeared to be a candidate tumor suppressor gene for myeloid disorders associated with 7q22 deletions. Polymerase chain reaction amplification and sequencing analysis of the coding region of the remaining ORC5L allele has not revealed any mutations in nine patients with AML or MDS exhibiting 7q22 deletions. Allelic expression analysis indicates that ORC5L is not imprinted. These data suggest that ORC5L does not function as a tumor suppressor in patients with myeloid neoplasms.

Copyright information

© Springer-Verlag 2001

Authors and Affiliations

  • Stefan Fröhling
    • 1
  • Kazuhiko Nakabayashi
    • 2
  • Stephen Scherer
    • 2
  • Hartmut Döhner
    • 1
  • Konstanze Döhner
    • 1
  1. 1.Abteilung Innere Medizin III, Medizinische Universitätsklinik und Poliklinik, Universität Ulm, Robert-Koch-Str. 8, 89081 Ulm, Germany
  2. 2.Department of Genetics, The Hospital for Sick Children, Toronto, Ontario, Canada