@article{9d3151b9ee9a411c8642dd21c736b113,
title = "Aberrant FGFR signaling mediates resistance to CDK4/6 inhibitors in ER+ breast cancer",
abstract = "Using an ORF kinome screen in MCF-7 cells treated with the CDK4/6 inhibitor ribociclib plus fulvestrant, we identified FGFR1 as a mechanism of drug resistance. FGFR1-amplified/ER+ breast cancer cells and MCF-7 cells transduced with FGFR1 were resistant to fulvestrant ± ribociclib or palbociclib. This resistance was abrogated by treatment with the FGFR tyrosine kinase inhibitor (TKI) lucitanib. Addition of the FGFR TKI erdafitinib to palbociclib/fulvestrant induced complete responses of FGFR1-amplified/ER+ patient-derived-xenografts. Next generation sequencing of circulating tumor DNA (ctDNA) in 34 patients after progression on CDK4/6 inhibitors identified FGFR1/2 amplification or activating mutations in 14/34 (41%) post-progression specimens. Finally, ctDNA from patients enrolled in MONALEESA-2, the registration trial of ribociclib, showed that patients with FGFR1 amplification exhibited a shorter progression-free survival compared to patients with wild type FGFR1. Thus, we propose breast cancers with FGFR pathway alterations should be considered for trials using combinations of ER, CDK4/6 and FGFR antagonists.",
author = "Luigi Formisano and Yao Lu and Alberto Servetto and Hanker, {Ariella B.} and Jansen, {Valerie M.} and Bauer, {Joshua A.} and Sudhan, {Dhivya R.} and Guerrero-Zotano, {Angel L.} and Sarah Croessmann and Yan Guo and Ericsson, {Paula Gonzalez} and Lee, {Kyung min} and Nixon, {Mellissa J.} and Schwarz, {Luis J.} and Sanders, {Melinda E.} and Dugger, {Teresa C.} and Cruz, {Marcelo Rocha} and Amir Behdad and Massimo Cristofanilli and Aditya Bardia and Joyce O{\textquoteright}Shaughnessy and Nagy, {Rebecca J.} and Lanman, {Richard B.} and Nadia Solovieff and Wei He and Michelle Miller and Fei Su and Yu Shyr and Mayer, {Ingrid A.} and Balko, {Justin M.} and Arteaga, {Carlos L.}",
note = "Funding Information: This study was supported by NIH Breast SPORE grant P50 CA098131, Vanderbilt-Ingram Cancer Center Support grant P30 CA68485, Susan G. Komen for the Cure Breast Cancer Foundation grant SAC100013, and a grant from the Breast Cancer Research Foundation. V.M.J. was supported by Conquer Cancer Foundation ASCO Young Investigator Award 8364, Susan G. Komen Postdoctoral Fellowship Grant PDF15329319, and the Vanderbilt Clinical Oncology Research Career Development Program (2K12CA090625-17). J.A.B. was supported by NCI Research Specialist Award R50 CA211206. L.F. was supported by AIRC under MFAG 2018 – ID. 21505. Publisher Copyright: {\textcopyright} 2019, The Author(s).",
year = "2019",
month = dec,
day = "1",
doi = "10.1038/s41467-019-09068-2",
language = "English (US)",
volume = "10",
journal = "Nature communications",
issn = "2041-1723",
publisher = "Nature Publishing Group",
number = "1",
}