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M. Kwak



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    MINI 05 - EGFR Mutant Lung Cancer 1 (ID 103)

    • Event: WCLC 2015
    • Type: Mini Oral
    • Track: Treatment of Advanced Diseases - NSCLC
    • Presentations: 1
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      MINI05.06 - A Phase Ib/II Study of Afainib plus Nimotuzumab in Non-Small Cell Lung Cancer Patients with Acquired Resistance to Gefitinib or Erlotinib (ID 667)

      17:15 - 17:20  |  Author(s): M. Kwak

      • Abstract
      • Presentation
      • Slides

      Background:
      Afatinib (A) is a potent irreversible EGFR TKI and nimotuzumab (N) is a humanized anti-EGFR mAb. In this phase Ib/II study, we aimed to assess the safety and activity of A plus N in advanced NSCLC patients with acquired resistance to gefitinib or erlotinib.

      Methods:
      Major inclusion criteria were advanced NSCLC with activating EGFR mutation or disease control for at least six months with previous gefitinib or erlotinib therapy. In the phase Ib study using classic 3+3 dose escalation method, patients were treated with A 40mg/d or 30mg/d in combination with N 100mg/w or 200mg/w. One cycle was composed of 4 weeks of treatment. In the phase II study, patients were treated with A plus N in the level of RP2D defined in the phase Ib study.

      Results:
      Overall, fifty pts were enrolled and treated: 13 in phase Ib and 37 in phase II. At the starting dose level (A 40mg/d + N 100mg/w), one out of 6 pts experienced end-of-cycle 1 DLT (G3 diarrhea), and the dose was up to the next level of A 40mg/d + N 200mg/w. Out of 6 pts at this level, 2 pts experienced DLTs (G3 diarrhea and G3 neutropenia, respectively), and RP2D was accordingly determined as A 40mg/d + N 100mg/w. In the whole treatment duration of the phase II, there was no treatment related death and 10 pts (20%) experienced any grade 3 adverse event, including diarrhea and skin rash. Out of evaluable 50 pts in the phase Ib/II study, the response rate was 36% (18 achieved partial response out of 50) and the median PFS was 4.4 months (95% CI:3.2-5.5 months).

      Conclusion:
      A and N showed an acceptable safety profile and promising antitumor activity in advanced NSCLC patients with acquired resistance to gefitinib or erlotinib.

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