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Journal Article
Research Support, Non-U.S. Gov't
MEK and PI3K catalytic activity as predictor of the response to molecularly targeted agents in triple-negative breast cancer.
Biochemical and Biophysical Research Communications 2017 August 6
Hyper-activation of the MAPK and PI3K-AKT pathways is linked to tumour progression in triple-negative breast cancer (TNBC). However, clinically effective predictive markers for drugs targeted against protein kinases involved in these pathways have not been identified. We investigated the ability of MEK and PI3K catalytic activity to predict sensitivity to trametinib and wortmannin in TNBC. MEK and PI3K activities correlated strongly with each other only in cell lines showing wortmannin-specific sensitivity, as shown by a linear regression curve (R = 0.951). Accordingly, we created a new parameter that distinguishes trametinib and wortmannin sensitivity in vitro and in vivo. Our findings suggest that the catalytic activities of MEK and PI3K might predict the response of TNBC to trametinib and wortmannin.
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