Clinical impact of ABL1 kinase domain mutations and IKZF1 deletion in adults under age 60 with Philadelphia chromosome-positive (Ph+) acute lymphoblastic leukemia (ALL): molecular analysis of CALGB (Alliance) 10001 and 9665

Rebecca DeBoer, Gregory Koval, Flora Mulkey, Meir Wetzler, Steven Devine, Guido Marcucci, Richard M. Stone, Richard A. Larson, Clara D. Bloomfield, Susan Geyer, Charles G. Mullighan, Wendy Stock

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

Recent studies have identified oncogenic lesions in Philadelphia chromosome-positive (Ph+) acute lymphoblastic leukemia (ALL) and ABL1 kinase mutations that confer resistance to tyrosine kinase inhibitors. We sought to determine the prevalence and clinical impact of these lesions in patients on CALGB 10001, a previously reported Phase II study of imatinib, chemotherapy, and hematopoietic cell transplant in adult Ph + ALL. Of the 58 enrolled, 22 relapsed. By direct sequencing, an ABL1 kinase mutation known to induce imatinib resistance was present at relapse in 13 of 20. Using quantitative PCR assays, the mutations were detectable at diagnosis or early during treatment in most (62%) relapsed patients. Aberrations in IKZF1, CDKN2A/B, and PAX5 were assessed in 28 samples using SNP arrays and genomic DNA sequencing. Of these, 22 (79%) had IKZF1 deletion. The combination of IKZF1 deletion and p210 BCR-ABL1 (p < 0.0001), high white blood cell count (p = 0.021), and minimal residual disease (p = 0.013) were associated with worse disease-free survival.

Original languageEnglish (US)
Pages (from-to)2298-2306
Number of pages9
JournalLeukemia and Lymphoma
Volume57
Issue number10
DOIs
StatePublished - Oct 2 2016

Keywords

  • Drug resistance
  • lymphoid leukemia
  • prognostication
  • transcription factor changes

ASJC Scopus subject areas

  • Hematology
  • Oncology
  • Cancer Research

Fingerprint Dive into the research topics of 'Clinical impact of ABL1 kinase domain mutations and IKZF1 deletion in adults under age 60 with Philadelphia chromosome-positive (Ph+) acute lymphoblastic leukemia (ALL): molecular analysis of CALGB (Alliance) 10001 and 9665'. Together they form a unique fingerprint.

Cite this