PMID- 23499266 OWN - NLM STAT- MEDLINE DCOM- 20140218 LR - 20211203 IS - 1532-3080 (Electronic) IS - 0960-9776 (Linking) VI - 22 IP - 4 DP - 2013 Aug TI - Everolimus in hormone receptor-positive advanced breast cancer: targeting receptor-based mechanisms of resistance. PG - 405-10 LID - S0960-9776(13)00034-9 [pii] LID - 10.1016/j.breast.2013.02.003 [doi] AB - Although patients with hormone receptor (HR)-positive breast cancer are successfully treated with endocrine therapy, many tumors go on to develop resistance to these agents. Studies have determined that mechanisms of resistance to endocrine therapy are quite complex and can involve a multitude of signal transduction pathways, either through direct association with the estrogen receptor or through cross-talk with other pathways. Preclinical studies have suggested the therapeutic importance of the mammalian target of rapamycin (mTOR) pathway and that inhibiting this pathway may restore sensitivity to endocrine therapy. The oral mTOR inhibitor everolimus has been extensively studied for breast cancer. Clinical studies suggest that everolimus in combination with endocrine therapy improves progression-free survival and is well tolerated. A combined approach, targeting both mTOR signal transduction and the HR pathways, promises to take clinical research in a new direction for the treatment of HR-positive advanced breast cancer. CI - Copyright (c) 2013 Elsevier Ltd. All rights reserved. FAU - Shtivelband, Mikhail I AU - Shtivelband MI AD - Ironwood Cancer & Research Centers, 695 South Dobson Road, Chandler, AZ 85224, USA. MShtivelband@ironwoodcrc.com LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review DEP - 20130314 PL - Netherlands TA - Breast JT - Breast (Edinburgh, Scotland) JID - 9213011 RN - 0 (Antineoplastic Agents) RN - 0 (Antineoplastic Agents, Hormonal) RN - 0 (Receptors, Estrogen) RN - 0 (Receptors, Progesterone) RN - 094ZI81Y45 (Tamoxifen) RN - 9HW64Q8G6G (Everolimus) RN - EC 2.7.1.1 (MTOR protein, human) RN - EC 2.7.10.1 (Receptor, ErbB-2) RN - EC 2.7.11.1 (TOR Serine-Threonine Kinases) RN - W36ZG6FT64 (Sirolimus) SB - IM MH - Antineoplastic Agents/*administration & dosage MH - Antineoplastic Agents, Hormonal/administration & dosage MH - Antineoplastic Combined Chemotherapy Protocols/*therapeutic use MH - Breast Neoplasms/*drug therapy/metabolism MH - Carcinoma/*drug therapy/metabolism MH - *Drug Resistance, Neoplasm MH - Everolimus MH - Female MH - Humans MH - Receptor, ErbB-2/metabolism MH - Receptors, Estrogen/metabolism MH - Receptors, Progesterone/metabolism MH - Signal Transduction/drug effects MH - Sirolimus/administration & dosage/*analogs & derivatives MH - TOR Serine-Threonine Kinases/drug effects MH - Tamoxifen/administration & dosage MH - Treatment Outcome EDAT- 2013/03/19 06:00 MHDA- 2014/02/19 06:00 CRDT- 2013/03/19 06:00 PHST- 2012/03/23 00:00 [received] PHST- 2013/01/15 00:00 [revised] PHST- 2013/02/11 00:00 [accepted] PHST- 2013/03/19 06:00 [entrez] PHST- 2013/03/19 06:00 [pubmed] PHST- 2014/02/19 06:00 [medline] AID - S0960-9776(13)00034-9 [pii] AID - 10.1016/j.breast.2013.02.003 [doi] PST - ppublish SO - Breast. 2013 Aug;22(4):405-10. doi: 10.1016/j.breast.2013.02.003. Epub 2013 Mar 14.