Breast Cancer Res Treat (2018) 168:57–67 https://doi.org/10.1007/s10549-017-4570-4 CLINICAL TRIAL Serial immunological parameters in a phase II trial of exemestane and low‑dose oral cyclophosphamide in advanced hormone receptor‑positive breast cancer 1 1 1 1 2 1 1 Maryann Kwa · Xiaochun Li · Yelena Novik · Ruth Oratz · Komal Jhaveri · Jennifer Wu · Ping Gu · 1 1 1 1 1 3 Marleen Meyers · Franco Muggia · James Speyer · Alyssa Iwano · Maryam Bonakdar · Lina Kozhaya · 1 1 1 1 1,3 1 Ece Tavukcuoglu · Bahar Budan · Roy Raad · Judith D. Goldberg · Derya Unutmaz · Sylvia Adams Received: 18 October 2017 / Accepted: 4 November 2017 / Published online: 9 November 2017 © Springer Science+Business Media, LLC, part of Springer Nature 2017 Abstract responses were seen in 6/23 patients (26.1%; 95% CI 10.2– Background and purpose Resistance to endocrine thera- 48.4%) and were durable (median 11.6 months). Three- pies in hormone receptor (HR)-positive breast cancer is a month PFS rate was 50.1% (95% CI 33.0–76.0%); median significant challenge. Prior studies have shown that low-dose PFS was 4.23 months (95% CI 2.8–11.7). No treatment- oral cyclophosphamide can transiently deplete regulatory T related decrease in Tregs was observed. However, elevated cells (Tregs) and improve anti-tumor immunity. We inves- baseline levels of Naïve Tregs [greater than 2.5 (the median
Breast Cancer Research and Treatment – Springer Journals
Published: Nov 9, 2017
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