Reference Detail

Ref Type

Journal Article

PMID

(26849637)

Authors

Yoshimura Y, Kurasawa M, Yorozu K, Puig O, Bordogna W, Harada N

Title

Antitumor activity of alectinib, a selective ALK inhibitor, in an ALK-positive NSCLC cell line harboring G1269A mutation: Efficacy of alectinib against ALK G1269A mutated cells.

Journal	Vol	Issue	Date	Pages	Journal Short Title
Cancer chemotherapy and pharmacology	77	3	2016 Mar	623-8	Cancer Chemother Pharmacol

URL

Abstract Text

Alectinib is a highly selective next-generation anaplastic lymphoma kinase (ALK) inhibitor. Although alectinib shows inhibitory activity against various crizotinib-resistant ALK mutations in studies using cell-free kinase assays and Ba/F3 cell-based assays, it has not been tested for efficacy against non-small cell lung cancer (NSCLC) with the ALK mutations.We conducted in vitro and in vivo investigations into the antitumor activity of alectinib against an ALK-positive NSCLC cell line, SNU-2535, which harbors an ALK G1269A mutation. The clinical efficacy of alectinib against a NSCLC patient harboring ALK G1269A mutation was evaluated in the phase I part of the North American study.Alectinib exhibited antiproliferative activity against SNU-2535 cells in vitro with IC50 of 33.1 nM. Alectinib strongly inhibited phosphorylation of ALK and its downstream signaling molecules ERK1/2, AKT, and STAT3. In a mouse xenograft model, once-daily oral administration of alectinib for 21 days resulted in strong tumor regression. In addition, administration of alectinib for 100 days achieved continuous tumor regression without tumor regrowth in all mice. Notably, eradication of tumor cells was observed in half of the mice. In the clinical study, a patient with ALK G1269A mutation showed partial response to alectinib with a duration of response of 84 days.These results indicated that alectinib has potent antitumor activity against NSCLC cells harboring the crizotinib-resistant mutation ALK G1269A. It is expected that alectinib would provide a valuable therapeutic option for patients with NSCLC having not only native ALK but also crizotinib-resistant ALK mutations.

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Molecular Profile	Treatment Approach
EML4 - ALK ALK G1269A	Alectinib

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	lung non-small cell carcinoma	sensitive	Alectinib	Case Reports/Case Series	Actionable	In a clinical case study, a patient with EML4-ALK fusion positive non-small cell lung cancer with ALK G1269A had a partial response to Alecensa (alectinib) treatment (PMID: 26849637).	26849637
EML4 - ALK ALK G1269A	lung non-small cell carcinoma	sensitive	Alectinib	Preclinical - Cell line xenograft	Actionable	In a preclinical study, Alecensa (alectinib) inhibited proliferation of a Xalkori (crizotinib)-resistant human non-small cell lung cancer cell line harboring an EML-ALK fusion with ALK G1269A in culture and induced tumor regression in cell line xenograft models (PMID: 26849637, PMID: 23344087).	26849637 23344087