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Optimising endocrine therapy in postmenopausal women with advanced breast cancer

Yau, Thomas Ho Lai; Cheung, Kwok-Leung

Authors

Thomas Ho Lai Yau



Abstract

Hormone receptor-positive breast cancer is commonly treated with endocrine therapy; however, overtime cancer cells can develop endocrine resistance. This review aims to document combination therapy and sequential therapy in the use of endocrine agents and targeted agents. By conducting two systematic searches using 4 databases: Cochrane Library, MEDLINE, EMBASE, and Web of Science. A total of 26 studies that covered combination therapy were obtained and included for the review. 14 were phase III documenting combinations of mechanistic target of rapamycin (mTOR), phosphoinositide-3-kinase (PI3K), vascular endothelial growth factor receptor (VEGFR), human epidermal growth factor receptor 2 (HER2), and cyclin dependent kinase 4/6 (CDK4/6) inhibitors. The remaining studies were of phase II nature that reported combinations involving inhibitors in mTOR, endothelial growth factor receptor (EGFR), CDK4/6, and tyrosine kinase inhibitor (TKI). Interesting findings in inhibitor combinations involving; CDK4/6, mTOR and PI3K suggest clinical activity that can overcome endocrine resistance. On the other hand, there were 0 studies that covered sequential therapy. Overall findings showed that combination therapy improved treatment efficacy over monotherapy in postmenopausal patients with hormone-receptor positive advanced breast cancer. Inevitably, the benefits are accompanied with increased toxicity. To optimise endocrine therapy, further research into combinations and effective patient selection will need to be defined. Additionally, this review warrants future studies to explore sequential therapy.

Journal Article Type Article
Publication Date Jul 30, 2018
Journal Endocrine-Related Cancer
Print ISSN 1351-0088
Electronic ISSN 1479-6821
Publisher BioScientifica
Peer Reviewed Peer Reviewed
Volume 25
Issue 7
Pages 705-721
APA6 Citation Yau, T. H. L., & Cheung, K. (2018). Optimising endocrine therapy in postmenopausal women with advanced breast cancer. Endocrine-Related Cancer, 25(7), 705-721. doi:10.1530/ERC-18-0021
DOI https://doi.org/10.1530/ERC-18-0021
Keywords Breast cancer, Hormone-receptor positive, Advanced, Postmenopausal, Endocrine Therapy, Combination, Sequential
Publisher URL https://erc.bioscientifica.com/view/journals/erc/25/7/ERC-18-0021.xml
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
Additional Information This manuscript has been accepted for publication in Endocrine-Related Cancer, but the version presented here has not yet been copy-edited, formatted or proofed. Consequently, Bioscientifica accepts no responsibility for any errors or omissions it may contain. The definitive version is now freely available at https://erc.bioscientif...c/25/7/ERC-18-0021.xml. c2018.

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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