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Vistusertib (dual m-TORC1/2 inhibitor) in combination with paclitaxel in patients with high-grade serous ovarian and squamous non-small-cell lung cancer

  • B Basu
  • , M G Krebs
  • , R Sundar
  • , R H Wilson
  • , J Spicer
  • , R Jones
  • , M Brada
  • , D C Talbot
  • , N Steele
  • , A H Ingles Garces
  • , W Brugger
  • , E A Harrington
  • , J Evans
  • , E Hall
  • , H Tovey
  • , F M De Oliveira
  • , S Carreira
  • , K Swales
  • , R Ruddle
  • , F I Raynaud
  • B Purchase, J C Dawes, M Parmar, A J Turner, N Tunariu, S Banerjee, J S De Bono, U Banerji
  • Cambridge University Hospitals NHS Foundation Trust
  • National University Health Systems
  • Queen's University Belfast
  • Oxford University Hospitals NHS Trust
  • University of Glasgow
  • The Institute of Cancer Research (University of London)
  • AstraZeneca
  • The Royal Marsden NHS Foundation Trust
  • University of Liverpool
  • King's College London
  • Guy's & St Thomas' NHS Foundation Trust
  • Cardiff University
  • Velindre Cancer Centre

Research output: Contribution to journal › Article › peer-review

Abstract

Background We have previously shown that raised p-S6K levels correlate with resistance to chemotherapy in ovarian cancer. We hypothesised that inhibiting p-S6K signalling with the dual m-TORC1/2 inhibitor in patients receiving weekly paclitaxel could improve outcomes in such patients. Patients and methods In dose escalation, weekly paclitaxel (80 mg/m 2) was given 6/7 weeks in combination with two intermittent schedules of vistusertib (dosing starting on the day of paclitaxel): schedule A, vistusertib dosed bd for 3 consecutive days per week (3/7 days) and schedule B, vistusertib dosed bd for 2 consecutive days per week (2/7 days). After establishing a recommended phase II dose (RP2D), expansion cohorts in high-grade serous ovarian cancer (HGSOC) and squamous non-small-cell lung cancer (sqNSCLC) were explored in 25 and 40 patients, respectively. Results The dose-escalation arms comprised 22 patients with advanced solid tumours. The dose-limiting toxicities were fatigue and mucositis in schedule A and rash in schedule B. On the basis of toxicity and pharmacokinetic (PK) and pharmacodynamic (PD) evaluations, the RP2D was established as 80 mg/m 2 paclitaxel with 50 mg vistusertib bd 3/7 days for 6/7 weeks. In the HGSOC expansion, RECIST and GCIG CA125 response rates were 13/25 (52%) and 16/25 (64%), respectively, with median progression-free survival (mPFS) of 5.8 months (95% CI: 3.28-18.54). The RP2D was not well tolerated in the SqNSCLC expansion, but toxicities were manageable after the daily vistusertib dose was reduced to 25 mg bd for the following 23 patients. The RECIST response rate in this group was 8/23 (35%), and the mPFS was 5.8 months (95% CI: 2.76-21.25). Discussion In this phase I trial, we report a highly active and well-tolerated combination of vistusertib, administered as an intermittent schedule with weekly paclitaxel, in patients with HGSOC and SqNSCLC. Clinical trial registration ClinicialTrials.gov identifier: CNCT02193633

Original languageEnglish
Pages (from-to)1918-1925
Number of pages8
JournalAnnals of Oncology
Volume29
Issue number9
Early online date17 Jul 2018
DOIs
Publication statusPublished - 1 Sept 2018

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

  1. SDG 3 - Good Health and Well-being
    SDG 3 Good Health and Well-being

Keywords

  • combination therapy
  • m-TORC1/m-TORC2 inhibitor
  • ovarian cancer
  • phase 1
  • squamous non-small-cell lung cancer

Research Highlights, Institutes and Platforms

  • Manchester Cancer Research Centre

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