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Cited by 203

The DOI matches its Crossref record; 5 of the 5 references it cites were found in a registry or an index.

Measurement of PIP3 Levels Reveals an Unexpected Role for p110β in Early Adaptive Responses to p110α-Specific Inhibitors in Luminal Breast Cancer

Open access
Costa, Carlotta, Ebi, Hiromichi, Martini, Miriam, Beausoleil, Sean A., Faber, Anthony C., Jakubik, Charles T., Huang, Alan, Wang, Youzhen, Nishtala, Madhuri, Hall, Ben, Rikova, Klarisa, Zhao, Jean, Hirsch, Emilio, Benes, Cyril H., Engelman, Jeffrey A.·2015·Cancer Cell

Abstract

SUMMARY BYL719, which selectively inhibits the alpha isoform of the phosphatidylinositol 3-kinase (PI3K) catalytic subunit (p110α), is currently in clinical trials for the treatment of solid tumors, especially luminal breast cancers with PIK3CA mutations and/or HER2 amplification. This study reveals that, even among these sensitive cancers, the initial efficacy of p110α inhibition is mitigated by rapid re-accumulation of the PI3K product PIP3 produced by the p110β isoform. Importantly, the reactivation of PI3K mediated by p110β does not invariably restore AKT phosphorylation, demonstrating the limitations of using phospho-AKT as a surrogate to measure PI3K activation. Consistently, we show that the addition of the p110β inhibitor to BYL719 prevents the PIP3 rebound and induces greater antitumor efficacy in HER2-amplified and PIK3CA mutant cancers.

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Metadata

Authors
Costa, C., Ebi, H., Martini, M., Beausoleil, S. A., Faber, A. C., Jakubik, C. T., Huang, A., Wang, Y., Nishtala, M., Hall, B., Rikova, K., Zhao, J., Hirsch, E., Benes, C. H., & Engelman, J. A.
Venue
Cancer Cell
Publisher
Elsevier BV
Published
2015-01
Volume
27
Issue
1
Pages
97-108
ISSN
1535-6108 (ISSN-L)
OpenAlex
W2156918228
Cited by
203
References
5
FWCI
7.67
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: Measurement of PIP3 Levels Reveals an Unexpected Role for p110β in Early Adaptive Responses to p110α-Specific Inhibitors in Luminal Breast Cancer. https://app.cochat.ai/papers/10.1016/j.ccell.2014.11.007
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Costa, C., Ebi, H., Martini, M., Beausoleil, S. A., Faber, A. C., Jakubik, C. T., Huang, A., Wang, Y., Nishtala, M., Hall, B., Rikova, K., Zhao, J., Hirsch, E., Benes, C. H., & Engelman, J. A. (2015). Measurement of PIP3 Levels Reveals an Unexpected Role for p110β in Early Adaptive Responses to p110α-Specific Inhibitors in Luminal Breast Cancer. Cancer Cell. https://doi.org/10.1016/j.ccell.2014.11.007

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.