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X. Liu



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    OA 09 - EGFR TKI Resistance (ID 663)

    • Event: WCLC 2017
    • Type: Oral
    • Track: Advanced NSCLC
    • Presentations: 1
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      OA 09.06 - A Phase Ib Trial of Savolitinib plus Gefitinib for Chinese Patients with EGFR-Mutant MET-Amplified Advanced NSCLC (ID 8995)

      11:00 - 12:30  |  Author(s): X. Liu

      • Abstract
      • Presentation
      • Slides

      Background:
      EGFR-tyrosine kinase inhibitor (TKI) treatment failure has been attributed to innate and/or acquired MET-amplification in patients with advanced EGFR-mutant NSCLC. Savolitinib (volitinib, HMPL-504, AZD6094), a highly selective small molecule MET-TKI, demonstrated greater efficacy combined with gefitinib than either compound alone in preclinical EGFR-mutant NSCLC models (D’Cruz et al. AACR, 2015).

      Method:
      This open-label, multi-centre, Phase Ib study (NCT02374645) assessed savolitinib plus gefitinib in patients enrolled in China with EGFR-mutant advanced NSCLC who progressed on prior EGFR-TKI. Primary objective was safety, tolerability, and identification of recommended Phase II dose (RP2D). Secondary objectives included preliminary anti-tumour activity (RECIST 1.1), pharmacokinetics, and ctDNA analysis for EGFR T790M mutation status. Eligible patients (≥18 years) had measurable disease, radiological disease progression on treatment, ECOG performance status 0/1, and adequate organ function. Patients had central evaluation of EGFR mutation (plasma based BEAMing digital PCR) and central screening for MET-amplification (MET/CEP7 ratio ≥2 or MET gene number ≥5, defined by tumour tissue FISH). Patients received gefitinib 250 mg once daily (QD) plus savolitinib 600 mg QD.

      Result:
      As of data-cut off (March 2017), 44 patients received study treatment. Median age was 61 years, 64% of patients were female; 6 patients were EGFR T790M positive and 5 were T790M negative (interim readout). The most common (≥20% patients) all causality adverse events (AEs), were vomiting (n=18, 41%), nausea (n=17, 39%), rash (n=16, 36%), increased ALT (n=14, 32%), increased AST (n=13, 30%), hypoalbuminaemia and gamma‑glutamyl transpeptidase increase (both n=11, 25%), and increased blood alkaline phosphatase (n=9, 21%). Grade ≥3 all causality AEs were reported in 14 (32%) patients; increased AST and increased ALT (both n=3, 7%) were most frequent. Three (7%) patients died due to an AE (respiratory failure [n=1], lung neoplasm [n=2]); none were considered treatment related. Anti-tumour activity was observed; confirmed partial responses were reported in 11/44 (25%) patients and a further 4 patients are awaiting confirmation of response (confirmed and unconfirmed response rate 15/44 [34%]). At the time of the scheduled 12 week study assessment, 20 (46%) patients remained on study treatment. Preliminary steady-state exposures and pharmacokinetic parameters of savolitinib and gefitinib were consistent with historical data.

      Conclusion:
      These encouraging findings warrant further assessment of savolitinib plus gefitinib for patients with EGFR-mutant, MET-amplified NSCLC who progressed on prior EGFR-TKI. The RP2D was confirmed as savolitinib 600 mg QD plus gefitinib 250 mg QD. This study is ongoing; updated safety and efficacy including anti-tumour activity by T790M status will be presented.

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    P2.04 - Clinical Design, Statistics and Clinical Trials (ID 705)

    • Event: WCLC 2017
    • Type: Poster Session with Presenters Present
    • Track: Clinical Design, Statistics and Clinical Trials
    • Presentations: 1
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      P2.04-003 - Phase II Trial of X-396 (Ensartinib) for Chinese Patients with ALK (+) Non–Small-Cell Lung Cancer Who Progressed on Crizotinib (ID 8849)

      09:30 - 16:00  |  Author(s): X. Liu

      • Abstract

      Background:
      Crizotinib has been established as the standard first-line treatment for patients with ALK-rearranged non-small-cell lung cancer. However, despite its superiority to chemotherapy, resistance occurs within approximately 12 months. New ALK-inhibitors are needed to overcome the resistance to crizotinib and to increase drug penetration to CNS. X-396 (ensartinib) is a novel, potent ALK tyrosine kinase inhibitor (TKI). Its phase I/II study showed X-396 is well-tolerated with favorable anti-tumor activities in both ALK TKI-naïve and crizotinib-resistant NSCLC patients, as well as patients with CNS metastases. The recommended phase II dose (RP2D) was established at 225 mg, once daily.

      Method:
      A phase II, multi-center study is evaluating the efficacy and safety of single-agent X-396 in Chinese patients with ALK (+) non–small-cell lung cancer after progression on crizotinib. Eligible patients will have documentation of a positive ALK rearrangement and progression on crizotinib. X-396 225 mg is orally administered until disease progression or intolerable toxicity. The primary endpoint is RECIST 1.1 response rate. Secondary endpoints include PFS, duration of response, and safety. The sample size is calculated using the test for inequality method, assuming that X396 have an ORR of 50% in patients with ALK-positive NSCLC, 15% higher than that from existing second-line therapy. Therefore, up to 144 patients will be enrolled with a significance level and power of 5% and 90%, respectively. Recruitment will be started on September, 2017.

      Result:
      Section not applicable

      Conclusion:
      Section not applicable