PMID- 25645727 OWN - NLM STAT- MEDLINE DCOM- 20150921 LR - 20191210 IS - 1744-7658 (Electronic) IS - 1354-3784 (Linking) VI - 24 IP - 3 DP - 2015 Mar TI - Buparlisib , an oral pan-PI3K inhibitor for the treatment of breast cancer. PG - 421-31 LID - 10.1517/13543784.2015.1008132 [doi] AB - INTRODUCTION: Deregulation of the phosphatidylinositol-3-kinase (PI3K)/Akt/mammalian target of rapamycin (mTOR) intracellular signaling pathway is common in breast cancer (BC) and has been found to be potentially implicated in resistance to endocrine and anti-HER2 therapies. Targeting the PI3K/Akt/mTOR pathway may remove this inhibition and restore sensitivity to these compounds. Buparlisib (BKM120) is a potent oral pan-class I PI3K inhibitor that is being extensively evaluated in multiple tumor types. AREAS COVERED: This review briefly summarizes the pharmacodynamics and pharmacokinetics of buparlisib, focusing on preclinical and clinical data in BC and on ongoing randomized trials. EXPERT OPINION: Overall, buparlisib is a safe and tolerable drug and, despite its peculiar toxicity profile, it is suitable for studies in combination with other anticancer agents in BC. Early-phase clinical trials in BC have provided evidence of antitumor activity. Several trials are being conducted in all the biological subsets of BC, including combinations with endocrine therapy, anti-HER2 agents, PARP-inhibitors and chemotherapy. While clinical results are eagerly awaited, biological material suitable for both genomic and non-genomic analyses is being collected. The authors expect an intense investigation of the potential biomarkers that explain response or resistance to buparlisib and inspire strategies to rationally explore the therapeutic potential of this drug. FAU - Geuna, Elena AU - Geuna E AD - Investigative Clinical Oncology (INCO), Fondazione del Piemonte per l'Oncologia (FPO) - Candiolo Cancer Center (IRCCs), Institute for Cancer Research and Treatment of Candiolo , Strada Provinciale 142, Km 3.95, CAP 10060, Candiolo, Turin , Italy +39 0119933958 ; +39 0119621525 ; andrea.milani@ircc.it. FAU - Milani, Andrea AU - Milani A FAU - Martinello, Rossella AU - Martinello R FAU - Aversa, Caterina AU - Aversa C FAU - Valabrega, Giorgio AU - Valabrega G FAU - Scaltriti, Maurizio AU - Scaltriti M FAU - Montemurro, Filippo AU - Montemurro F LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review DEP - 20150203 PL - England TA - Expert Opin Investig Drugs JT - Expert opinion on investigational drugs JID - 9434197 RN - 0 (Aminopyridines) RN - 0 (Antineoplastic Agents) RN - 0 (Morpholines) RN - 0 (NVP-BKM120) RN - 0 (Phosphoinositide-3 Kinase Inhibitors) SB - IM MH - Aminopyridines/adverse effects/pharmacology/*therapeutic use MH - Animals MH - Antineoplastic Agents/adverse effects/pharmacology/therapeutic use MH - Breast Neoplasms/*drug therapy/pathology MH - Drug Resistance, Neoplasm MH - Female MH - Humans MH - Molecular Targeted Therapy MH - Morpholines/adverse effects/pharmacology/*therapeutic use MH - *Phosphoinositide-3 Kinase Inhibitors MH - Signal Transduction/drug effects OTO - NOTNLM OT - HER2-directed therapy OT - breast cancer OT - buparlisib OT - chemotherapy OT - endocrine therapy OT - mammalian target of rapamycin OT - phosphatidylinositol-3-kinase EDAT- 2015/02/04 06:00 MHDA- 2015/09/22 06:00 CRDT- 2015/02/04 06:00 PHST- 2015/02/04 06:00 [entrez] PHST- 2015/02/04 06:00 [pubmed] PHST- 2015/09/22 06:00 [medline] AID - 10.1517/13543784.2015.1008132 [doi] PST - ppublish SO - Expert Opin Investig Drugs. 2015 Mar;24(3):421-31. doi: 10.1517/13543784.2015.1008132. Epub 2015 Feb 3.