PMID- 24101324 OWN - NLM STAT- MEDLINE DCOM- 20140527 LR - 20211021 IS - 1573-7217 (Electronic) IS - 0167-6806 (Print) IS - 0167-6806 (Linking) VI - 141 IP - 3 DP - 2013 Oct TI - A phase 2 study of everolimus combined with trastuzumab and paclitaxel in patients with HER2-overexpressing advanced breast cancer that progressed during prior trastuzumab and taxane therapy. PG - 437-46 LID - 10.1007/s10549-013-2689-5 [doi] AB - Increased activation of the PI3K/Akt/mTOR pathway is a common factor in putative mechanisms of trastuzumab resistance, resulting in dysregulation of cell migration, growth, proliferation, and survival. Data from preclinical and phase 1/2 clinical studies suggest that adding everolimus (an oral mTOR inhibitor) to trastuzumab plus chemotherapy may enhance the efficacy of, and restore sensitivity to, trastuzumab-based therapy. In this phase 2 multicenter study, adult patients with HER2-positive advanced breast cancer resistant to trastuzumab and pretreated with a taxane received everolimus 10 mg/day in combination with paclitaxel (80 mg/m(2) days 1, 8, and 15 every 4 weeks) and trastuzumab (4 mg/kg loading dose followed by 2 mg/kg weekly), administered in 28-day cycles. Endpoints included overall response rate (ORR), progression-free survival (PFS), overall survival (OS), and safety. Fifty-five patients were enrolled; one remained on study treatment at the time of data cutoff. The median number of prior chemotherapy lines for advanced disease was 3.5 (range 1-11). The ORR was 21.8 %, the clinical benefit rate was 36.4 %, the median PFS estimate was 5.5 months (95 % confidence interval [CI]: 4.99-7.69 months), and the median OS estimate was 18.1 months (95 % CI: 12.85-24.11 months). Hematologic grade 3/4 adverse events (AEs) included neutropenia (25.5 % grade 3, 3.6 % grade 4), anemia (7.3 % grade 3), and thrombocytopenia (5.5 % grade 3, 1.8 % grade 4). Nonhematologic grade 3/4 AEs included stomatitis (20.0 %), diarrhea (5.5 %), vomiting (5.5 %), fatigue (5.5 %), and pneumonia (5.5 %), all grade 3. These findings suggest that the combination of everolimus plus trastuzumab and paclitaxel is feasible, with promising activity in patients with highly resistant HER2-positive advanced breast cancer. This combination is currently under investigation in the BOLERO-1 phase 3 trial. FAU - Hurvitz, Sara A AU - Hurvitz SA AD - Department of Medicine, Hematology/Oncology, UCLA Jonsson Comprehensive Cancer Center, 10945 Le Conte Avenue, PVUB Suite 3360, Los Angeles, CA, 90095, USA, shurvitz@mednet.ucla.edu. FAU - Dalenc, Florence AU - Dalenc F FAU - Campone, Mario AU - Campone M FAU - O'Regan, Ruth M AU - O'Regan RM FAU - Tjan-Heijnen, Vivianne C AU - Tjan-Heijnen VC FAU - Gligorov, Joseph AU - Gligorov J FAU - Llombart, Antonio AU - Llombart A FAU - Jhangiani, Haresh AU - Jhangiani H FAU - Mirshahidi, Hamid R AU - Mirshahidi HR FAU - Tan-Chiu, Elizabeth AU - Tan-Chiu E FAU - Miao, Sara AU - Miao S FAU - El-Hashimy, Mona AU - El-Hashimy M FAU - Lincy, Jeremie AU - Lincy J FAU - Taran, Tetiana AU - Taran T FAU - Soria, Jean-Charles AU - Soria JC FAU - Sahmoud, Tarek AU - Sahmoud T FAU - Andre, Fabrice AU - Andre F LA - eng PT - Clinical Trial, Phase II PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20131008 PL - Netherlands TA - Breast Cancer Res Treat JT - Breast cancer research and treatment JID - 8111104 RN - 0 (Antibodies, Monoclonal, Humanized) RN - 0 (Taxoids) RN - 9HW64Q8G6G (Everolimus) RN - EC 2.7.10.1 (ERBB2 protein, human) RN - EC 2.7.10.1 (Receptor, ErbB-2) RN - P188ANX8CK (Trastuzumab) RN - P88XT4IS4D (Paclitaxel) RN - W36ZG6FT64 (Sirolimus) SB - IM MH - Adult MH - Aged MH - Aged, 80 and over MH - Antibodies, Monoclonal, Humanized/administration & dosage MH - Antineoplastic Combined Chemotherapy Protocols/*therapeutic use MH - Breast Neoplasms/*drug therapy/metabolism/mortality/pathology MH - Disease Progression MH - Disease-Free Survival MH - Everolimus MH - Female MH - Humans MH - Kaplan-Meier Estimate MH - Middle Aged MH - Neoplasm Staging MH - Paclitaxel/administration & dosage MH - Receptor, ErbB-2/*metabolism MH - Sirolimus/administration & dosage/analogs & derivatives MH - Taxoids/administration & dosage MH - Trastuzumab MH - Treatment Failure PMC - PMC3824346 EDAT- 2013/10/09 06:00 MHDA- 2014/05/28 06:00 PMCR- 2013/10/08 CRDT- 2013/10/09 06:00 PHST- 2013/06/28 00:00 [received] PHST- 2013/08/28 00:00 [accepted] PHST- 2013/10/09 06:00 [entrez] PHST- 2013/10/09 06:00 [pubmed] PHST- 2014/05/28 06:00 [medline] PHST- 2013/10/08 00:00 [pmc-release] AID - 2689 [pii] AID - 10.1007/s10549-013-2689-5 [doi] PST - ppublish SO - Breast Cancer Res Treat. 2013 Oct;141(3):437-46. doi: 10.1007/s10549-013-2689-5. Epub 2013 Oct 8.