Cited by 324PI3K/AKT/mTOR signaling in cancerAdvanced Breast Cancer TherapiesMelanoma and MAPK Pathways

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

Open access
Bedard, Philippe L., Tabernero, Josep, Janku, Filip, Wainberg, Zev A., Paz-Ares, Luis, Vansteenkiste, Johan, Van Cutsem, Eric, Pérez-García, José +10 more·2015·Clinical Cancer Research

Published version of a preprint

Abstract

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. Clin Cancer Res; 21(4); 730–8. ©2014 AACR.

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  • Despite attempts to verify the efficacy of combined PI3K and MEK inhibition, no desirable clinical result has been achieved for mutant-RAS tumors, and none of the approved PI3K inhibitors is adapted to treat them.

    “Despite attempts to verify the efficacy of combined inhibition of PI3K and MEK, no desirable clinical result has been achieved for mutant-RAS tumors, and none of the approved PI3K inhibitors is adapted to treat them.620–622”

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  1. [15]15. Babb J, Rogatko A, Zacks S. Cancer phase I clinical trials: ef fi cient dose escalation with overdose control. Stat Med 1998;17:1103 -20.
  2. [24]24. Janku F, Wheler JJ, Naing A, Falchook GS, Hong DS, Stepanek VM, et al. PIK3CAmutationH1047RisassociatedwithresponsetoPI3K/AKT/mTOR signaling pathway inhibitors in early-phase clinical trials. Cancer Res 2013;73:276 -84.
  3. [28]28. Tejpar S, Celik I, Schlichting M, Sartorius U, Bokemeyer C, Van Cutsem E. Association of KRAS G13Dtumormutationswithoutcomeinpatientswith metastatic colorectal cancer treated with fi rst-line chemotherapy with or without cetuximab. J Clin Oncol 2012;30:357 -07.

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Authors
Bedard, P. L., Tabernero, J., Janku, F., Wainberg, Z. A., Paz-Ares, L., Vansteenkiste, J., Van Cutsem, E., Pérez-García, J., Stathis, A., Britten, C. D., Le, N., Carter, K., Demanse, D., Csonka, D., Peters, M., Zubel, A., Nauwelaerts, H., & Sessa, C.
Affiliations
  • Princess Margaret Cancer Centre (CA)
  • Universitat Autònoma de Barcelona (ES)
  • 3The University of Texas MD Anderson Cancer Center, Houston, Texas.
  • University of California, Los Angeles (US)
  • Hospital Universitario Virgen del Rocío (ES)
  • Universitair Ziekenhuis Leuven (BE)
  • 7Digestive Oncology, University Hospital KU Leuven, Leuven, Belgium.
  • Istituto Oncologico della Svizzera Italiana (CH)
  • GlaxoSmithKline (United States) (US)
  • Novartis (Switzerland) (CH)
  • 10Novartis Pharma AG, Basel, Switzerland.
Corresponding author
Sessa, Cristiana
Venue
Clinical Cancer Research
Published
2015-02-15
Volume
21
Issue
4
Pages
730-738
ISSN
  • 1078-0432 (ISSN-L)
  • 1557-3265
OpenAlex
W1988878042
Cited by
324
References
30
Citations by year
2026: 11 · 2025: 18 · 2024: 23 · 2023: 25 · 2022: 22 · 2021: 50 · 2020: 32 · 2019: 39 · 2018: 27 · 2017: 29 · 2016: 25 · 2015: 20 · 2014: 1 · 2013: 2
FWCI
10.24
Type
journal article
Language
en
Open access
Locations
  • Clinical Cancer Research (publishedVersion)
  • PubMed (publishedVersion)
  • Lirias (submittedVersion, other-oa)
Funders
GlaxoSmithKline
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › PI3K/AKT/mTOR signaling in cancer
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Advanced Breast Cancer Therapies
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Melanoma and MAPK Pathways
Keywords
buparlisib, trametinib, PI3K/AKT/mTOR inhibition, MEK1/2 inhibition, MAPK signaling, combination therapy, dose-limiting toxicity, maximum tolerated dose, recommended phase 2 dose, pharmacokinetics, ovarian cancer, non-small cell lung cancer, pancreatic cancer, stomatitis
MeSH terms
Adult, Aged, Aged, 80 and over, Aminopyridines, Antineoplastic Combined Chemotherapy Protocols, Dose-Response Relationship, Drug, Female, Humans, Male, Middle Aged, Morpholines, Neoplasms, Pyridones, Pyrimidinones, Disease-Free Survival, Maximum Tolerated Dose

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