Reference Detail

Contact

Missing content? – Request curation!

Request curation for specific Genes, variants, or PubMed publications.

Have questions, comments or suggestions? - Let us know!

Email us at : ckbsupport@jax.org

Ref Type Journal Article
PMID (22235099)
Authors Doebele RC, Pilling AB, Aisner DL, Kutateladze TG, Le AT, Weickhardt AJ, Kondo KL, Linderman DJ, Heasley LE, Franklin WA, Varella-Garcia M, Camidge DR
Title Mechanisms of resistance to crizotinib in patients with ALK gene rearranged non-small cell lung cancer.
Journal Clinical cancer research : an official journal of the American Association for Cancer Research
Vol 18
Issue 5
Date 2012 Mar 01
URL
Abstract Text Patients with anaplastic lymphoma kinase (ALK) gene rearrangements often manifest dramatic responses to crizotinib, a small-molecule ALK inhibitor. Unfortunately, not every patient responds and acquired drug resistance inevitably develops in those who do respond. This study aimed to define molecular mechanisms of resistance to crizotinib in patients with ALK(+) non-small cell lung cancer (NSCLC).We analyzed tissue obtained from 14 patients with ALK(+) NSCLC showing evidence of radiologic progression while on crizotinib to define mechanisms of intrinsic and acquired resistance to crizotinib.Eleven patients had material evaluable for molecular analysis. Four patients (36%) developed secondary mutations in the tyrosine kinase domain of ALK. A novel mutation in the ALK domain, encoding a G1269A amino acid substitution that confers resistance to crizotinib in vitro, was identified in two of these cases. Two patients, one with a resistance mutation, exhibited new onset ALK copy number gain (CNG). One patient showed outgrowth of epidermal growth factor receptor (EGFR) mutant NSCLC without evidence of a persistent ALK gene rearrangement. Two patients exhibited a KRAS mutation, one of which occurred without evidence of a persisting ALK gene rearrangement. One patient showed the emergence of an ALK gene fusion-negative tumor compared with the baseline sample but with no identifiable alternate driver. Two patients retained ALK positivity with no identifiable resistance mechanism.Crizotinib resistance in ALK(+) NSCLC occurs through somatic kinase domain mutations, ALK gene fusion CNG, and emergence of separate oncogenic drivers.

Filtering

  • Case insensitive filtering will display rows where any text in any cell matches the filter term
  • Simple literal full or partial string matches
  • Separate multiple filter terms with a spaces, order doesn't matter (a b c and c b a are equivalent )
  • Filtering will only apply to rows that are already loaded on the page, filtering has no impact on query parameters
  • Use quotes to match a longer phrase which contains spaces "mtor c1483f"

Sorting

  • Generally, the default sort order for tables is set to be first column ascending, however, specific tables may set a different default sort order.
  • Click on any column header arrows to sort by that column
  • Hold down the Shift key and click multiple columns to sort by more than one column, be sure to set ascending or descending order for a given column, before moving on to the next column.

Molecular Profile Treatment Approach
Gene Name Source Synonyms Protein Domains Gene Description Gene Role
Therapy Name Drugs Efficacy Evidence Clinical Trials
Drug Name Trade Name Synonyms Drug Classes Drug Description
Gene Variant Impact Protein Effect Variant Description Associated with drug Resistance
Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
EML4 - ALK ALK G1269A Advanced Solid Tumor resistant Crizotinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing ALK G1269A in the context of EML4-ALK were resistant to Xalkori (crizotinib) in culture (PMID: 22235099). 22235099
EML4 - ALK ALK G1269A lung non-small cell carcinoma resistant Crizotinib Case Reports/Case Series Actionable In a clinical case study, a non-small cell lung carcinoma patient harboring EML4-ALK demonstrated stable disease when treated with Xalkori (crizotinib), but then progressed, and was found to harbor a secondary resistance mutation, ALK G1269A (PMID: 22235099). 22235099