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Nouha Chaabane



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    MA07 - Clinical Questions and Potential Blood Markers for Immunotherapy (ID 125)

    • Event: WCLC 2019
    • Type: Mini Oral Session
    • Track: Immuno-oncology
    • Presentations: 1
    • Now Available
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      MA07.05 - Immune Checkpoint Inhibitor (ICPi) Re-Challenge: Outcomes Analysis in a French National Cohort of Non-Small-Cell Lung Cancer (NSCLC) Patients (Now Available) (ID 1903)

      13:30 - 15:00  |  Author(s): Nouha Chaabane

      • Abstract
      • Presentation
      • Slides

      Background

      Anti-PD1/PDL1 deeply changed the NSCLC therapeutic algorithm in the past few years. Unfortunately, a majority of patients experiences disease progression. ICPis re-challenge could be an attractive option but no data supporting this strategy are available. Here we report outcomes of a large cohort of NSCLC patients treated with anti-PD1/PDL1 re-challenge.

      Method

      We retrospectively collected data about 144 advanced NSCLC patients (diagnosis between 2010 and 2018) from 26 French centers. Patients were re-challenged with ICPis after at least 12 weeks of discontinuation for toxicity, disease progression or clinical decision. Progression Free Survival (PFS) and Overall Survival (OS) were calculated from the start of first or second ICPi to disease progression (PFS1;PFSR) and death or last follow-up (OS1;OS2) respectively.

      Result

      Median age was 63 year [39 –83], most of patients were male (67%), smokers (87%), adenocarcinomas (62%) and stage IV at diagnosis (66%). Most of patients received the first ICPi round in first or second line (66%) and the second ICPi round in third line or later (79%). In both settings patients received preferentially an anti-PD1 (87%) and no differences were detected regarding brain metastasis or ECOG PS (P = 1.10-1 and P = 1.10-1 respectively). The Best Response during the re-challenge was not associated to that one achieved to the first ICPi (P = 1.10-1). The median PFS1 and PFSR were 13 months [95% CI 10-16.5] and 4.4 months [95% CI 3-6.5] respectively. PFSR was longer in patients discontinued because of clinical decision (6.5 months [95% CI 2.5-11.9]) or toxicity (5.8 months [95%CI 3.5-18]) compared to disease progression (2.9 months [95% CI 2.0-4.4]) (P = 2.10-2) and in those not receiving chemotherapy between the two ICPis (5.8 months [95%CI 4.1-10.5]) compared to those who did (3.0 months [95% CI 2.0-4.4])(P = 2.10-3). Median OS1 was 3.3 years [95% CI 2.9-3.9] without differences according to the discontinuation reason (P =2.10-1). Median OS2 was 1.5 y [95%CI 1.0-2.1] and was longer in patients discontinuing the first ICPi due to toxicity (2.1y [95%CI 1.4-NR]) compared to disease progression (1.0y [95%CI 0.4-1.5]) or clinical decision (1.5y [95%CI 0.4-NR]) (P = 3.10-2). Neither OS1 nor OS2 were affected by treatments received between the two ICPis (P = 3.10-1 and P = 1.10-1 respectively).

      Conclusion

      ICPis re-challenge might be a useful option mainly in patients discontinuing the first ICPi because of toxicity or clinical decision and in those able to keep a treatment-free period between the two ICPis.

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