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W. Zhao



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    OA 10 - Liquid Biopsy for Genomic Alterations (ID 678)

    • Event: WCLC 2017
    • Type: Oral
    • Track: Advanced NSCLC
    • Presentations: 1
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      OA 10.07 - Genomic Profile of Cell-Free DNA from Sputum, Plasma, Urine and Tumor Tissue and Correlation with  Clinical Effect in Advanced NSCLC (ID 9009)

      12:05 - 12:15  |  Author(s): W. Zhao

      • Abstract
      • Presentation
      • Slides

      Background:
      The detection of driver gene mutation based on tumor tissue can instruct target therapy and conduct molecular monitoring after drug-resistance in advanced NSCLC, but many patients have no access to this kind of test because of inadequate tumor tissue or inability to tolerate the invasive test. Some studies have explored the value of EGFR mutation test in body fluids such as plasma，urine and sputum from NSCLC patients. But the sensitivity based on individual liquid specimen is poor compared with gold standard---tissue. We detect multi-genes in multi-liquid samples in parallel to investigate the Consistency and complementarity of genetic profile in different liquid samples and it’s correlation with efficacy of the real world therapy in advanced NSCLC.

      Method:
      The patients newly diagnosed with NSCLC and first-generation EGFR-TKI acquired drug-resistance were enrolled into our research (NCT:02778854) prospectively, the pre-treatment samples including tumor tissue, plasma, urine and sputum were collected. We conducted capture-based NGS (next generation sequencing) on all of these samples from 50 patients with a ctDNA panel covering significant exons and introns from 400 human genes including EGFR, KRAS, ALK, ROS1, c-MET and other important genes in the tumor related singling pathways such as PI3K-AKT-mTOR, JAK-STAT, Notch, Wnt and so on. Patients recruited in our experiment have been given unique treatment such as targeted treatment or chemotherapy according to the clinical examination. The final molecular diagnostic results of all clinical liquid or tissue specimen are supposed to be correlated with clinical response data.

      Result:
      （Applied for Late-Breaking Abstract） This section is not applicable now because the sequencing and complex data analysis is in progress. Therefore, we will submit the final results as late-breaking abstract.

      Conclusion:
      Section not applicable. We expect to figure out the molecular diagnostic value of different body fluid compared with tumor tissue. we are able to analyze for correlation of the genomic profile derived from liquid samples and respective tissue results and clinical response of each patient.

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