Molecular alterations of the IDH1 gene in AML: a Children's Oncology Group and Southwest Oncology Group study

Leukemia. 2010 May;24(5):909-13. doi: 10.1038/leu.2010.56. Epub 2010 Apr 8.

Abstract

Recent whole-genome sequencing efforts led to the identification of IDH1(R132) mutations in acute myeloid leukemia (AML) patients. We studied the prevalence and clinical implications of IDH1 genomic alterations in pediatric and adult AML. Diagnostic DNA from 531 AML patients treated on Children's Oncology Group trial COG-AAML03P1 (N=257), and Southwest Oncology Group trials SWOG-9031, SWOG-9333 and SWOG-9500 (N=274), were tested for IDH1 mutations. Codon R132 mutations were absent in the pediatric cohort, but were found in 12 of 274 adult patients (4.4%, 95% CI 2.3-7.5). IDH1(R132) mutations occurred most commonly in patients with normal karyotype, and those with FLT3/ITD and NPMc mutations. Patients with IDH1(R132) mutations trended toward higher median diagnostic white blood cell counts (59.2 x 10(9) vs 29.1 x 10(9) per liter, P=0.19) than those without mutations, but the two groups did not differ significantly in age, bone marrow blast percentage, overall survival or relapse-free survival. Eleven patients (2.1%) harbored a novel V71I sequence alteration, which was found to be a germ-line polymorphism. IDH1 mutations were not detected in pediatric AML, and are uncommon in adult AML.

Publication types

  • Multicenter Study
  • Research Support, N.I.H., Extramural

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Aged, 80 and over
  • Biomarkers, Tumor / genetics*
  • Child
  • Child, Preschool
  • Codon / genetics*
  • Female
  • Genotype
  • Humans
  • Infant
  • Infant, Newborn
  • Isocitrate Dehydrogenase / genetics*
  • Karyotyping
  • Leukemia, Myeloid, Acute / genetics*
  • Leukemia, Myeloid, Acute / pathology
  • Male
  • Middle Aged
  • Mutation / genetics*
  • Nuclear Proteins / genetics
  • Prevalence
  • Prognosis
  • Tandem Repeat Sequences / genetics
  • Young Adult
  • fms-Like Tyrosine Kinase 3 / genetics

Substances

  • Biomarkers, Tumor
  • Codon
  • Nuclear Proteins
  • nucleophosmin
  • Isocitrate Dehydrogenase
  • IDH1 protein, human
  • FLT3 protein, human
  • fms-Like Tyrosine Kinase 3