Pembrolizumab And Tamoxifen Among Women With Advanced Hormone Receptor Positive Breast Cancer And Esr1 Mutation

Summary

Pembrolizumab is a potent and highly selective humanized monoclonal antibody (mAb) designed to directly block the interaction between PD-1 and its ligands and enable the T cell to remain active and co-ordinate an attack on tumor cells. We hypothesise that the Clinical Benefit Rate (CBR) and progression free survival (PFS) of metastatic breast cancer patients who have ESR1 mutation will improve following administration of a combination of pembrolizumab and tamoxifen.

Timeline

Start

2019-08-01

Primary completion

2022-08-01

Completion

2022-08-01

Publications

• Background Baselga J, Campone M, Piccart M, Burris HA 3rd, Rugo HS, Sahmoud T, Noguchi S, Gnant M, Pritchard KI, Lebrun F, Beck JT, Ito Y, Yardley D, Deleu I, Perez A, Bachelot T, Vittori L, Xu Z, Mukhopadhyay P, Lebwohl D, Hortobagyi GN. Everolimus in postmenopausal hormone-receptor-positive advanced breast cancer. N Engl J Med. 2012 Feb 9;366(6):520-9. doi: 10.1056/NEJMoa1109653. Epub 2011 Dec 7.
• Background Finn RS, Martin M, Rugo HS, Jones S, Im SA, Gelmon K, Harbeck N, Lipatov ON, Walshe JM, Moulder S, Gauthier E, Lu DR, Randolph S, Dieras V, Slamon DJ. Palbociclib and Letrozole in Advanced Breast Cancer. N Engl J Med. 2016 Nov 17;375(20):1925-1936. doi: 10.1056/NEJMoa1607303.
• Background Toy W, Shen Y, Won H, Green B, Sakr RA, Will M, Li Z, Gala K, Fanning S, King TA, Hudis C, Chen D, Taran T, Hortobagyi G, Greene G, Berger M, Baselga J, Chandarlapaty S. ESR1 ligand-binding domain mutations in hormone-resistant breast cancer. Nat Genet. 2013 Dec;45(12):1439-45. doi: 10.1038/ng.2822. Epub 2013 Nov 3.
• Background Rugo HS, Delord J-P, Im S-A, Ott PA, Piha-Paul SA, Bedard PL, Sachdev J, Le Tourneau C, van Brummelen E, Varga A, Saraf S, Pietrangelo D, Karantza V, Tan A.[S5-07] Preliminary efficacy and safety of pembrolizumab (MK-3475) in patients with PD-L1-positive, estrogen receptor-positive (ER+)/HER2-negative advanced breast cancer enrolled in KEYNOTE-028; Oral Session: General Session 5 (9:30 AM-11:30 AM); SABCS 2015
• Background Vonderheide RH, LoRusso PM, Khalil M, Gartner EM, Khaira D, Soulieres D, Dorazio P, Trosko JA, Ruter J, Mariani GL, Usari T, Domchek SM. Tremelimumab in combination with exemestane in patients with advanced breast cancer and treatment-associated modulation of inducible costimulator expression on patient T cells. Clin Cancer Res. 2010 Jul 1;16(13):3485-94. doi: 10.1158/1078-0432.CCR-10-0505. Epub 2010 May 17.

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