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J. Quispel-Janssen



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    OA 02 - Mesothelioma: Challenges For New Treatment (ID 653)

    • Event: WCLC 2017
    • Type: Oral
    • Track: Mesothelioma
    • Presentations: 1
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      OA 02.02 - Ipilimumab and Nivolumab in the Treatment of Recurrent Malignant Pleural Mesothelioma: A Phase II Study (ID 9389)

      11:00 - 12:30  |  Author(s): J. Quispel-Janssen

      • Abstract
      • Presentation
      • Slides

      Background:
      There is an increasing interest in the use of IO therapy in Mesothelioma (MPM). We previously reported on the effect of nivolumab (s.a) in patients with recurrent MPM with a disease control rate of 50% at 12 weeks. We therefore decided to test the effect of the combination of nivolumab and ipilimumab in recurrent MPM.

      Method:
      Patients with previously treated MPM and a PS of 0-1 are consented in this single arm prospective study. Pleural lesions must be available for biopsy before and after 6 weeks of treatment.Nivolumab is administered at a fixed dose of 240 mg (q2w) until progression and combined with ipilimumab (1mg/kg) on week 1, 7, 13 and 19. CT scans are performed every 6 weeks for analysis and duration of response. The primary endpoint is disease controle rate at 12 weeks. Translational research is performed on paired biopsies. A Simon’s minimax two-stage design is used to identify a DCR of >50%. Therefore 33 patients will be included.

      Result:
      From October 2016 until August 2017 38 patients gave informed consent. Three patients did not start due to progression or impossibility to biopsy. Two stopped after 1 cycle (due to progression or withdrawn consent). At time of analysis (August 29) 25 patients could be evaluated for response. At 12 weeks a DCR of 72% (18/25) and ORR of 28% (7/25) is observed. Two patients continued treatment after progression at 6 weeks; 1 achieved a PR after 4 months , and the other one is stable. Of the first 11 patients that have been in study for 6 months, 5 have PR, 1 SD and 4 PD. Toxicity is mild. SAE’s reported in the 38 patients occurred in 11 patients with grade 3 or 4 toxicity. No grade 5 toxicity was observed.

      Conclusion:
      In this interim analysis nivolumab plus ipilimumab meets the primary endpoint for patients with recurrent malignant mesothelioma. Toxicity is mild. The full data set will be presented at the WCLC.

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