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D.S. Hong
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P2.06 - Poster Session with Presenters Present (ID 467)
- Event: WCLC 2016
- Type: Poster Presenters Present
- Track: Scientific Co-Operation/Research Groups (Clinical Trials in Progress should be submitted in this category)
- Presentations: 2
- Moderators:
- Coordinates: 12/06/2016, 14:30 - 15:45, Hall B (Poster Area)
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P2.06-001 - A Study of MGCD516, a Receptor Tyrosine Kinase (RTK) Inhibitor, in Molecularly Selected Patients with NSCLC or Other Advanced Solid Tumors (ID 4109)
14:30 - 14:30 | Author(s): D.S. Hong
- Abstract
Background:
MGCD516 (Sitravatinib), is an oral, potent small molecule inhibitor of a closely related spectrum of RTKs including RET, the split RTKs (VEGFR, PDGFR and KIT), TRK family, DDR2, MET and AXL. RTKs inhibited by sitravatinib are genetically altered in NSCLC and other cancers, where they function as oncogenic drivers, promoting cancer development and progression. Alterations in these RTKs have also been implicated in tumor resistance mechanisms. Sitravatinib has demonstrated antitumor activity in nonclinical cancer models harboring genetic alterations of sitravatinib targets, including rearrangement of RET, NTRK, or CHR4q12 amplification. Phase 1 dose escalation has been completed, showing dose proportional increases in exposure. PK and preliminary PD data indicate inhibition of the targets at the 150 mg dose administered orally once per day.
Methods:
This phase 1b study includes enrollment of molecularly selected patients (pts) with unresectable or metastatic NSCLC or other advanced solid tumor malignancies in patient cohorts characterized by activating alterations in sitravatinib RTK targets (RET, KDR, PDGFRA, KIT, TRK, DDR2, MET, AXL) or by loss of function mutations in CBL, a negative regulator for MET, AXL and PDGFR/KIT signaling. Pts receive sitravatinib at 150 mg once daily in 21-day cycles. Study endpoints include safety and tolerability, PK/PD, and clinical activity assessed by objective disease response per RECIST 1.1, duration of response and survival. A two stage optimal Simon design of up to 24 pts (8 pts in first stage and 16 pts in second stage) will be applied to those cohorts defined by a specific tumor gene alteration assuming p~0~=0.15 and p~1~=0.35, with an additional expansion of a cohort up to a total of 70 pts in order to provide a more precise estimate of ORR. PD biomarkers, including sMET, sVEGFR2, VEGFA and sAXL, are being explored in plasma samples for prognostic potential and possible relationship with clinical outcome. The study is open for enrollment, and recruitment is ongoing. Clinical trial information: NCT02219711
Results:
Section not applicable
Conclusion:
Section not applicable
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P2.06-017 - Amethyst NSCLC Trial: Phase 2 Study of MGCD265 in Patients with Advanced or Metastatic NSCLC with Activating Genetic Alterations in MET (ID 5384)
14:30 - 14:30 | Author(s): D.S. Hong
- Abstract
Background:
MGCD265 is a potent, orally available, small molecule RTK inhibitor of MET and Axl, both of which mediate signals for cell growth, survival, and migration. The Amethyst NSCLC trial is designed to evaluate the activity of MGCD265 in patients with NSCLC exhibiting genetic alterations involving MET. Alterations in MET, including gene amplification and/or genetic mutations, occur in approximately 7% of NSCLC cases converting MET to an oncogene capable of driving cancer development and progression. Amplification of MET has been associated with a poor prognosis in NSCLC. In addition, various genetic mutations result in the deletion of exon 14 in MET mRNA (METex14del) and the subsequent loss of the Y1003 regulatory binding site for CBL ubiquitin ligase, required for MET degradation and signal attenuation. Loss of the Y1003 binding site of MET results in sustained MET signaling, which has been implicated as an oncogenic driver in a subset of NSCLC. The importance of MET as a driver is demonstrated in xenograft models of NSCLC with METex14del and MET amplification, and where MGCD265 induces tumor regression. Additionally, confirmed partial responses have been observed in pts with NSCLC characterized by METex14del who were treated with MGCD265 in the Phase 1 setting.
Methods:
Pts with platinum pre-treated NSCLC characterized by activating genetic MET alterations identified in tumor tissue or circulating tumor DNA (ctDNA) are eligible for this multi-center, global, Phase 2 trial. Pts are assigned to one of four cohorts based on the type of MET dysregulation and detection method: 1) mutations in tissue, 2) amplification in tissue, 3) mutations in ctDNA, and 4) amplification in ctDNA. The primary endpoint is Objective Response Rate (ORR) in accordance with RECIST 1.1; a Bayesian Predictive Probability Design is applied independently to each cohort. Secondary objectives include safety, tolerability, response duration, survival, correlation between tissue and ctDNA testing, and PK/PD. This study is currently open globally, and recruitment is ongoing.
Results:
Section not applicable.
Conclusion:
Section not applicable.
