Precision medicine approaches to lung adenocarcinoma with concomitant MET and HER2 amplification.

Abstract:

BACKGROUND:Patient-derived xenograft (PDX) models are important tools in precision medicine and for the development of targeted therapies to treat cancer patients. This study aimed to evaluate our precision medicine strategy that integrates genomic profiling and preclinical drug-screening platforms, in order to personalize cancer treatments using PDX models. METHODS:We performed array-comparative genomic hybridization, microarray, and targeted next-generation sequencing analyses, in order to determine the oncogenic driver mutations. PDX cells were obtained from PDXs and subsequently screened in vitro with 17 targeted agents. RESULTS:PDX tumors recapitulated the histopathologic and genetic features of the patient tumors. Among the samples from lung cancer patients that were molecularly-profiled, copy number analysis identified unique focal MET amplification in one sample, 033 T, without RTK/RAS/RAF oncogene mutations. Although HER2 amplification in 033 T was not detected in the cancer panel, the selection of HER2-amplified clones was found in PDXs and PDX cells. Additionally, MET and HER2 overexpression were found in patient tumors, PDXs, and PDX cells. Crizotinib or EGFR tyrosine kinase inhibitor treatments significantly inhibited cell growth and impaired tumor sphere formation in 033 T PDX cells. CONCLUSIONS:We established PDX cell models using surgical samples from lung cancer patients, and investigated their preclinical and clinical implications for personalized targeted therapy. Additionally, we suggest that MET and EGFR inhibitor-based therapy can be used to treat MET and HER2-overexpressing lung cancers, without receptor tyrosine kinase /RAS/RAF pathway alterations.

journal_name

BMC Cancer

journal_title

BMC cancer

authors

Oh DY,Jung K,Song JY,Kim S,Shin S,Kwon YJ,Oh E,Park WY,Song SY,Choi YL

doi

10.1186/s12885-017-3525-9

subject

Has Abstract

pub_date

2017-08-10 00:00:00

pages

535

issue

1

issn

1471-2407

pii

10.1186/s12885-017-3525-9

journal_volume

17

pub_type

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