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T. Sawa



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    MA08 - Treatment Monitoring in Advanced NSCLC (ID 386)

    • Event: WCLC 2016
    • Type: Mini Oral Session
    • Track: Advanced NSCLC
    • Presentations: 1
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      MA08.10 - Detection of the T790M Mutation of EGFR in Plasma of Advanced NSCLC Patients with Acquired Resistance to EGFR-TKI (WJOG8014LTR) (ID 5377)

      12:06 - 12:12  |  Author(s): T. Sawa

      • Abstract
      • Presentation
      • Slides

      Background:
      NSCLC patients with activating mutations of the EGFR initially respond well to TKIs, but about half such patients develop TKI resistance through acquisition of a secondary T790M mutation. Whereas next-generation EGFR-TKIs have been developed to overcome T790M-mediated resistance, performance of a second tumor biopsy to assess T790M mutation status can be problematic.

      Methods:
      We developed and evaluated liquid biopsy assays for detection of TKI-sensitizing and T790M mutations of EGFR by droplet digital PCR (ddPCR) in EGFR mutation–positive patients with acquired EGFR-TKI resistance.

      Results:
      A total of 260 patients was enrolled between November 2014 and March 2015 at 29 centers for this West Japan Oncology Group (WJOG 8014LTR) study. Plasma specimens from all subjects as well as tumor tissue or malignant pleural effusion or ascites from 41 patients were collected after the development of EGFR-TKI resistance. All plasma samples were genotyped successfully and the results were reported to physicians within 14 days. TKI-sensitizing and T790M mutations were detected in plasma of 120 (46.2%) and 75 (28.8%) patients, respectively. T790M was detected in 56.7% of patients with plasma positive for TKI-sensitizing mutations. For the 41 patients with paired samples obtained after acquisition of EGFR-TKI resistance, the concordance for mutation detection by ddPCR in plasma compared with tumor tissue or malignant fluid specimens was 78.0% for TKI-sensitizing mutations and 65.9% for T790M.

      Conclusion:
      Noninvasive genotyping by ddPCR with cell-free DNA extracted from plasma is a promising approach to the detection of gene mutations during targeted treatment.

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    P2.08 - Poster Session with Presenters Present (ID 491)

    • Event: WCLC 2016
    • Type: Poster Presenters Present
    • Track: Patient Support and Advocacy Groups
    • Presentations: 1
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      P2.08-007 - Listen Advocate Voice - Web-Survey for the Japanese Model of Lung Cancer Advocacy by Society (ID 5651)

      14:30 - 14:30  |  Author(s): T. Sawa

      • Abstract
      • Slides

      Background:
      In Asian countries, the concept of cancer advocacy has not been sufficiently recognized. In Japan, Lung Cancer Society (JLCS) has led the lung cancer advocacy with a part of the NPO, and adopted the 2014 Kyoto Declaration. To evaluate the awareness and attitude of lung cancer advocacy activity among patients, medical workers, and the general population in Japan, web survey was planned for the perceptions of Kyoto declaration and JLCA (Japanese alliance for lung cancer advocacy) events which were carried out by JLCS in these 2 years.

      Methods:
      An internet survey using survey monkey was conducted which contained 6 closed-ended (selection one or free answers) and open-ended questions, depending on the JLCA network population in June 2016.

      Results:
      109 people of responded involving 36% of patients and their family, 25% of MD and medical worker, 19% of pharmaceutical company officials and 16% of news media. Perception of Kyoto declaration was 21% of attendee, 27% of well-known, 13% of partial known and 39% of non-awareness. Also the number of participants to the events of JLCA is, 49% of 0 times, 17% 0f 1-2 times, 24% of 3-4 times and 11% of more than 5 times. The most sympathy events ware voted to 1) lecture by a physician 57%, 2) lecture by survivor and the participants WCLC of cancer patients 46%, 3) information in the facebook and the web site 46% 4) citizen open lecture of lung cancer 39%, 5) Performance by society ambassador 38%, 6) advocacy program in annual meetings 26% and 7) Medical seminars around the country 26%. The proportion of respondents who have a certain reputation in the activities of JLCA was 76%. The requests to JLCA is, 1) is the most participation opportunities for information of new treatment and participation opportunities to clinical trial, followed by 2) wish to participate to all the programs in the Society.

      Conclusion:
      In Japan, awareness about the advocacy is improved, and it was found that the expect to Society for the diverse needs through the Internet survey.

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