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Blood, 1 January 2006, Vol. 107, No. 1, pp. 39-45.
Prepublished online as a Blood First Edition Paper on September 8, 2005; DOI 10.1182/blood-2005-06-2305.
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Submitted June 9, 2005
Accepted August 4, 2005
XPD Lys751gln polymorphism: Etiology and outcome of childhood acute myeloid leukemia. A children's oncology group report
Parinda A Mehta*, Todd A Alonzo, Robert B Gerbing, James S Elliott, Tiffany A Wilke, Rebekah J Kennedy, Julie A Ross, John P Perentesis, Beverly J Lange, and Stella M Davies
Division of Hematology/Oncology, Department of Pediatrics, University of Cincinnati College of Medicine, and Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
University of Southern California Keck School of Medicine, Los Angeles, CA, USA
Children's Oncology Group, Arcadia, CA, USA
Department of Pediatrics, University of Minnesota Cancer Center, Minneapolis, MN, USA
Department of Pediatrics, The Children's Hospital of Philadelphia, Philadelphia, PA, USA
* Corresponding author; email: parinda.mehta{at}cchmc.org.
Genetic polymorphisms result in inter-individual variation in DNA repair capacity, and may in part, account for susceptibility of a cell to genotoxic agents, and to malignancy. Polymorphisms in XPD, a member of the nucleotide excision repair pathway, have been associated with development of treatment-related AML and with poor outcome of AML in elderly patients. We hypothesized that XPD Lys751Gln polymorphism may play a role in causation of AML in children and, as shown in adults, may affect the outcome of childhood AML therapy. 456 children treated for de novo AML were genotyped at XPD exon 23. Genotype frequencies in cases were compared with normal control frequencies and patient outcomes were analyzed according to genotype. Gene frequencies in AML patients and normal controls were similar. There were no significant differences in overall survival (p= 0.82), event-free survival (p= 0.78), treatment-related mortality, (p= 0.43) or relapse rate (RR) (p= 0.92) between patients with XPD751AA vs. 751AC vs. 751CC genotypes, in contrast to reports in adult AML. These data, representing the only data in pediatric AML, suggest that XPD genotype does not affect the etiology or outcome of childhood AML.

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