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S. Hinotsu



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    MA 07 - ALK, ROS and HER2 (ID 673)

    • Event: WCLC 2017
    • Type: Mini Oral
    • Track: Advanced NSCLC
    • Presentations: 1
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      MA 07.11 - A Phase II Study of Trastuzumab Emtansine in HER2-positive Non-Small-Cell-Lung Cancer (ID 8453)

      16:55 - 17:00  |  Author(s): S. Hinotsu

      • Abstract
      • Presentation
      • Slides

      Background:
      Trastuzumab emtansine (T-DM1), an anti-HER2 antibody conjugated with vinca-alkaloid, has been approved for clinical use in HER2-positive breast cancer. HER2-alterations are detected even in non-small-cell lung cancer (NSCLC). We have launched a phase II trial of T-DM1 monotherapy for patients with HER2-positive lung cancer.

      Method:
      Eligible patients had pathologically diagnosed NSCLC with documented HER2-positivity (immunohistochemistry [IHC] 3+, both IHC 2+ and fluorescence in situ hybridization [FISH] +, or exon 20 insertion mutation) and were previously treated with standard chemotherapy. Thirty patients would receive T-DM1 3.6 mg/kg every 3 weeks. The primary endpoint is the overall response rate (ORR) per RECIST v1.1.

      Result:
      This study was early terminated due to the limited efficacy, leading that only 16 patients were registered. The demographics of the 15 evaluable patients were as follows: age (median; 67, range: 45-77), sex (male; 47%), performance status (0-1; 80%), histology (non-squamous; 100%), HER2 status (IHC3+; 33%, IHC2+/FISH; 20%, and mutation; 47%) and number of prior chemotherapeutic regimens (median; 4, range: 1-7). Of 15 patients, one, who possessed HER2 mutation achieved a partial response, resulting in ORR of 6.7%. None of the 15 patients experienced treatment-related deaths. Survival data would be presented at the meeting.

      Conclusion:
      T-DM1 has a limited efficacy for HER2-positive NSCLCs in our cohort. Additional molecular approaches are warranted for the precision medicine in HER2-positive tumors. UMIN registration number 000019446.

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