On 23 Oct 2023, liquid biopsies (LBx) and tissue biopsies (TBx) for identifying MET exon 14 (METex14) skipping in advanced NSCLC: Analyses from the phase II VISION study of tepotinib was reported at the ESMO Congress.
Tepotinib Hydrochloride Hydrate is a small molecule drug that targets c-Met, a protein involved in cell growth and survival. It has shown potential therapeutic benefits in the treatment of various neoplasms, digestive system disorders, and respiratory diseases. The active indications for this drug include non-small cell lung cancer, colorectal cancer, liver cancer, and hepatocellular carcinoma.
According to the Patsnap Synapse, Tepotinib Hydrochloride HydrateIt has reached the highest phase of development, which is approved globally. And the clinical trial areas for Tepotinib Hydrochloride Hydrate are primarily in the United States, China, and Italy. The key indication is Non-Small Cell Lung Cancer.
This single group assignment, open-labeled clinical trial (NCT02864992) was conducted in advanced NSCLC.
In this study, METex14 was centrally assessed in prescreening by NGS analysis of fresh LBx (Guardant360® or Archer®MET) and/or archival or fresh TBx (Oncomine Focus or Archer®MET). Pts in Japan could enroll based on local TBx RT-PCR via the LC-SCRUM program. Parallel LBx/TBx testing was recommended but not mandatory. Eligibility required LBx-positive (L+) and/or TBx-positive (T+) status.
The result showed that of 313 pts, 208 (66.5%) were T+ and 178 (56.9%) were L+. L+ pts had worse baseline prognostic features than T+ pts, including more pts with ≥3 target lesions (27.5% vs 18.8%) or ECOG PS 1 (76.4% vs 72.1%), higher median sum of target lesion diameters (67.1 vs 55.2 mm) and worse health-related quality of life (mean EORTC QLQ-C30 GHS, 53.9 vs 60.1). In 180 T+ pts with matching LBx results, METex14 was detected in ctDNA (L+) in 74 (41.1%) (i.e. T+/L+) and was undetectable (L–) in 106 (58.9%) (i.e. T+/L–). ORRs were slightly higher in T+/L+ pts, but T+/L– pts had longer DOR, PFS and OS..
It can be concluded that Tepotinib had robust and durable activity in T+ pts with L– or L+ status. While both LBx and TBx are suitable and complementary for detecting METex14, LBx may preferentially select pts with a poorer prognosis and higher tumor load. Undetectable METex14 in baseline ctDNA may define a more favorable treatment outcome. Differences in populations identified by TBx and LBx should be considered when interpreting trial data.
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