
| Systematic Drug Screening Identifies Tractable Targeted Combination Therapies in
Triple-Negative Breast Cancer
#MMPMID27872098
Wali VB
; Langdon CG
; Held MA
; Platt JT
; Patwardhan GA
; Safonov A
; Aktas B
; Pusztai L
; Stern DF
; Hatzis C
Cancer Res
2017[Jan]; 77
(2
): 566-578
PMID27872098
show ga
Triple-negative breast cancer (TNBC) remains an aggressive disease without
effective targeted therapies. In this study, we addressed this challenge by
testing 128 FDA-approved or investigational drugs as either single agents or in
768 pairwise drug combinations in TNBC cell lines to identify synergistic
combinations tractable to clinical translation. Medium-throughput results were
scrutinized and extensively analyzed for sensitivity patterns, synergy,
anticancer activity, and were validated in low-throughput experiments. Principal
component analysis revealed that a fraction of all upregulated or downregulated
genes of a particular targeted pathway could partly explain cell sensitivity
toward agents targeting that pathway. Combination therapies deemed immediately
tractable to translation included ABT-263/crizotinib, ABT-263/paclitaxel,
paclitaxel/JQ1, ABT-263/XL-184, and paclitaxel/nutlin-3, all of which exhibited
synergistic antiproliferative and apoptotic activity in multiple TNBC
backgrounds. Mechanistic investigations of the ABT-263/crizotinib combination
offering a potentially rapid path to clinic demonstrated RTK blockade, inhibition
of mitogenic signaling, and proapoptotic signal induction in basal and
mesenchymal stem-like TNBC. Our findings provide preclinical proof of concept for
several combination treatments of TNBC, which offer near-term prospects for
clinical translation. Cancer Res; 77(2); 566-78. ©2016 AACR.
|*Triple Negative Breast Neoplasms
[MESH]|Antineoplastic Combined Chemotherapy Protocols/*pharmacology
[MESH]|Blotting, Western
[MESH]|Cell Line, Tumor
[MESH]|Cell Proliferation/drug effects
[MESH]|Drug Screening Assays, Antitumor/*methods
[MESH]|Drug Synergism
[MESH]|Female
[MESH]|Flow Cytometry
[MESH]|Humans
[MESH]|Immunoprecipitation
[MESH]
  
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