PMID- 25500057 OWN - NLM STAT- MEDLINE DCOM- 20151209 LR - 20220316 IS - 1557-3265 (Electronic) IS - 1078-0432 (Linking) VI - 21 IP - 4 DP - 2015 Feb 15 TI - A phase Ib dose-escalation study of the oral pan-PI3K inhibitor buparlisib (BKM120) in combination with the oral MEK1/2 inhibitor trametinib (GSK1120212) in patients with selected advanced solid tumors. PG - 730-8 LID - 10.1158/1078-0432.CCR-14-1814 [doi] AB - PURPOSE: MAPK and PI3K/AKT/mTOR pathways play important roles in many tumors. In this study, safety, antitumor activity, and pharmacokinetics of buparlisib (pan class PI3K inhibitor) and trametinib (MEK inhibitor) were evaluated. EXPERIMENTAL DESIGN: This open-label, dose-finding, phase Ib study comprised dose escalation, followed by expansion part in patients with RAS- or BRAF-mutant non-small cell lung, ovarian, or pancreatic cancer. RESULTS: Of note, 113 patients were enrolled, 66 and 47 in dose-escalation and -expansion parts, respectively. MTD was established as buparlisib 70 mg + trametinib 1.5 mg daily [5/15, 33% patients with dose-limiting toxicities (DLT)] and recommended phase II dose (RP2D) buparlisib 60 mg + trametinib 1.5 mg daily (1/10, 10% patients with DLTs). DLTs included stomatitis (8/103, 8%), diarrhea, dysphagia, and creatine kinase (CK) increase (2/103, 2% each). Treatment-related grade 3/4 adverse events (AEs) occurred in 73 patients (65%); mainly CK increase, stomatitis, AST/ALT (aspartate aminotransferase/alanine aminotransferase) increase, and rash. For all (21) patients with ovarian cancer, overall response rate was 29% [1 complete response, 5 partial responses (PR)], disease control rate 76%, and median progression-free survival was 7 months. Minimal activity was observed in patients with non-small cell lung cancer (1/17 PR) and pancreatic cancer (best overall response was SD). Relative to historical data, buparlisib exposure increased and trametinib exposure slightly increased with the combination. CONCLUSIONS: At RP2D, buparlisib 60 mg + trametinib 1.5 mg daily shows promising antitumor activity for patients with KRAS-mutant ovarian cancer. Long-term tolerability of the combination at RP2D is challenging, due to frequent dose interruptions and reductions for toxicity. CI - (c)2014 American Association for Cancer Research. FAU - Bedard, Philippe L AU - Bedard PL AD - Princess Margaret Cancer Centre, Toronto, Ontario, Canada. FAU - Tabernero, Josep AU - Tabernero J AD - Vall d'Hebron University Hospital and Vall d'Hebron Institute of Oncology (VHIO), Universitat Autonoma de Barcelona, Barcelona, Spain. FAU - Janku, Filip AU - Janku F AD - The University of Texas MD Anderson Cancer Center, Houston, Texas. FAU - Wainberg, Zev A AU - Wainberg ZA AD - UCLA-University of California, Los Angeles, California. FAU - Paz-Ares, Luis AU - Paz-Ares L AD - Hospital Universitario Virgen del Rocio, Seville, Spain. FAU - Vansteenkiste, Johan AU - Vansteenkiste J AD - Respiratory Oncology, University Hospital KU Leuven, Leuven, Belgium. FAU - Van Cutsem, Eric AU - Van Cutsem E AD - Digestive Oncology, University Hospital KU Leuven, Leuven, Belgium. FAU - Perez-Garcia, Jose AU - Perez-Garcia J AD - Vall d'Hebron University Hospital and Vall d'Hebron Institute of Oncology (VHIO), Universitat Autonoma de Barcelona, Barcelona, Spain. FAU - Stathis, Anastasios AU - Stathis A AD - Oncology Institute of Southern Switzerland, Bellinzona, Switzerland. FAU - Britten, Carolyn D AU - Britten CD AD - UCLA-University of California, Los Angeles, California. FAU - Le, Ngocdiep AU - Le N AD - GlaxoSmithKline Oncology R&D, Collegeville, Pennsylvania. FAU - Carter, Kirsten AU - Carter K AD - Novartis Pharma AG, Basel, Switzerland. FAU - Demanse, David AU - Demanse D AD - Novartis Pharma AG, Basel, Switzerland. FAU - Csonka, Denes AU - Csonka D AD - Novartis Pharma AG, Basel, Switzerland. FAU - Peters, Malte AU - Peters M AD - Novartis Pharma AG, Basel, Switzerland. FAU - Zubel, Angela AU - Zubel A AD - Novartis Pharma AG, Basel, Switzerland. FAU - Nauwelaerts, Heidi AU - Nauwelaerts H AD - Novartis Pharma AG, Basel, Switzerland. FAU - Sessa, Cristiana AU - Sessa C AD - Oncology Institute of Southern Switzerland, Bellinzona, Switzerland. Cristiana.Sessa@eoc.ch. LA - eng PT - Clinical Trial, Phase I PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20141210 PL - United States TA - Clin Cancer Res JT - Clinical cancer research : an official journal of the American Association for Cancer Research JID - 9502500 RN - 0 (Aminopyridines) RN - 0 (Morpholines) RN - 0 (NVP-BKM120) RN - 0 (Pyridones) RN - 0 (Pyrimidinones) RN - 33E86K87QN (trametinib) SB - IM MH - Adult MH - Aged MH - Aged, 80 and over MH - Aminopyridines/*administration & dosage/adverse effects MH - Antineoplastic Combined Chemotherapy Protocols/*administration & dosage/adverse effects MH - Disease-Free Survival MH - Dose-Response Relationship, Drug MH - Female MH - Humans MH - Male MH - Maximum Tolerated Dose MH - Middle Aged MH - Morpholines/*administration & dosage/adverse effects MH - Neoplasms/*drug therapy/mortality MH - Pyridones/*administration & dosage/adverse effects MH - Pyrimidinones/*administration & dosage/adverse effects EDAT- 2014/12/17 06:00 MHDA- 2015/12/15 06:00 CRDT- 2014/12/16 06:00 PHST- 2014/12/16 06:00 [entrez] PHST- 2014/12/17 06:00 [pubmed] PHST- 2015/12/15 06:00 [medline] AID - 1078-0432.CCR-14-1814 [pii] AID - 10.1158/1078-0432.CCR-14-1814 [doi] PST - ppublish SO - Clin Cancer Res. 2015 Feb 15;21(4):730-8. doi: 10.1158/1078-0432.CCR-14-1814. Epub 2014 Dec 10.