A thirty-five nucleotides BCR-ABL1 insertion mutation of controversial significance confers resistance to imatinib in a patient with chronic myeloid leukemia (CML)

Exp Mol Pathol. 2015 Aug;99(1):16-8. doi: 10.1016/j.yexmp.2015.04.007. Epub 2015 Apr 22.

Abstract

Tyrosine kinase inhibitors (TKI) have improved the management of patients with chronic myeloid leukemia (CML). However, a significant proportion of patients does not achieve the optimal response or are resistant to TKI. ABL1 kinase domain mutations have been extensively implicated in the pathogenesis of TKI resistance. Although deletion or insertion of nucleotides in BCR-ABL1 has rarely been described, we identified a CML patient with an already described 35 nucleotides insertion (BCR-ABL1(35INS)) of controversial significance, that confers resistance to imatinib but sensitivity to dasatinib.

Keywords: BCR-ABL1; CML; Insertion; Mutation; Resistance; TKI.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Base Sequence
  • Benzamides / therapeutic use*
  • Dasatinib
  • Drug Resistance, Neoplasm / genetics*
  • Exons
  • Female
  • Fusion Proteins, bcr-abl / genetics*
  • Humans
  • Imatinib Mesylate
  • Leukemia, Myelogenous, Chronic, BCR-ABL Positive / genetics*
  • Molecular Sequence Data
  • Mutagenesis, Insertional*
  • Nucleotides / chemistry*
  • Piperazines / therapeutic use*
  • Pyrimidines / therapeutic use*
  • RNA, Messenger / genetics
  • RNA, Messenger / metabolism
  • Sequence Analysis, DNA
  • Thiazoles / therapeutic use

Substances

  • BCR-ABL1 fusion protein, human
  • Benzamides
  • Nucleotides
  • Piperazines
  • Pyrimidines
  • RNA, Messenger
  • Thiazoles
  • Imatinib Mesylate
  • Fusion Proteins, bcr-abl
  • Dasatinib