MET amplification

P1, N=388, Recruiting, Shanghai Chest Hospital; CSPC Megalith Biopharmaceutical Co., Ltd

The known resistance mechanisms, including MET amplification, EGFR (C797S, L718Q/R), TP53, CDK4, CDK6, CDKN2A, BRAF, KRAS, NRAS and PIK3CA mutations were also disclosed in our cohort. NGS assay can achieve a high concordance with FISH in MET amplification detection and has advantages in portraying various genetic alterations, which is of worthy in clinical promotion.

AXL and PIM-1 expression detected in CTCs during treatment suggesting new possible therapeutic strategies. Our results reveal that comprehensive liquid biopsy analysis can efficiently represent the heterogeneous molecular landscape and provide prominent information on subsequent treatments for NSCLC patients at PD since druggable molecular alterations were detected in CTCs.

Systemic therapy, such as chemotherapy using gemcitabine and cisplatin, is the first choice for patients with cholangiocarcinoma who were inoperable. The development of precision medicine has expanded the paradigm of targeted therapies to increasingly favorable options in the second line and beyond, and prolong overall survival. Detecting druggable mutations (mutations potentially amenable to treatment with) for identifying a landscape of therapeutic options is imperative for managing cholangiocarcinoma.

P1, N=250, Recruiting, Mythic Therapeutics | N=150 --> 250

P2, N=88, Recruiting, SWOG Cancer Research Network | Not yet recruiting --> Recruiting

Among patients with advanced BTC, ctDNA-based genotyping showed acceptable concordance with tissue genomic profiling. Liquid biopsy using ctDNA could be a valuable complement to tissue-based genomic analysis in BTC.

A 43-year-old, female diagnosed with T4N3M1c NSCLC harboring the echinoderm microtubule-associated protein-like 4 (EML4)-ALK fusion variant 1 (EML4-ALK v.1) and TP53 co-mutation, displayed only mixed response after three months and highly symptomatic progression after 6 months of first-line brigatinib treatment. The latter may represent a mechanism of intrinsic ALK-TKI resistance and its recognition by FISH, in NGS-negative cases, may be considered before initiating first-line treatment. This recognition is clinically important as combined therapy with ALK-TKI and MET-inhibitor should be the preferred first-line treatment.

Immuno-chemotherapy is a first-line optional treatment strategy in addition to targeted therapy for NSCLC patients with primary METamp. Foxp3-negative expression better predicts the near-term efficacy of immunotherapy.

P2, N=10, Active, not recruiting, National Cancer Institute (NCI) | Trial completion date: Sep 2024 --> Sep 2025

P2, N=47, Active, not recruiting, AstraZeneca | Suspended --> Active, not recruiting | Trial completion date: Dec 2024 --> Aug 2025 | Trial primary completion date: Oct 2024 --> Aug 2025

Current sub-studies: S1900E (KRAS) activated on April 2, 2021 and is studying sotorasib (AMG 510) in non-squamous NSCLC...S1900G (EGFR and MET) activated on April 3, 2023 and is studying capmatinib and osimertinib with or without ramucirumab in NSCLC. S1900K (MET exon 14 skipping) activated on December 18, 2023 and is studying tepotinib with or without ramucirumab in NSCLC. S1900J (MET amplification) is opening fall 2024 and is studying amivantamab in NSCLC...One hundred seventy-four (5%) were submitted with the classification of "Other". The most common reasons included: no sub-studies available, patient chose hospice, and patient transferred to different hospital.

Tissue NGS-based HER2, KRAS and MET CNG thresholds set by oncogene overlap identified potentially clinically relevant "Amp" subgroups with altered genetic profiles and decreased survival. Prospective research into targeted therapy benefit in these groups is encouraged.

P1, N=177, Completed, Haihe Biopharma Co., Ltd. | Unknown status --> Completed | N=75 --> 177

P1, N=56, Completed, Haihe Biopharma Co., Ltd. | Unknown status --> Completed | N=113 --> 56

Crizotinib successfully overcomes MET amplification in ROS1-rearranged NSCLC after entrectinib failure.

Nevertheless, disease progression inevitably occurs, limiting osimertinib long-term efficacy...Early phase 1/2 clinical trials are ongoing to elucidate their activity also in the clinical setting. Aim of this review is to provide a state-of-the-art analysis on preclinical development of fourth-generation EGFR-TKIs and promising preliminary clinical data.

These long-term results support METex14 as a targetable oncogenic driver in NSCLC and add to the evidence supporting capmatinib as a targeted treatment option for treatment-naive and previously treated patients with METex14 NSCLC.

Tepotinib showed remarkable efficacy in treating MET-amplified intrahepatic cholangiocarcinoma, underscoring the importance of molecular profiling in BTCs and suggesting a potential new therapeutic approach for this rare cancer subtype.

This multicenter registration study investigated tissue-based NGS for a specific patient population with NSCLC in Taiwan.

The BEACON CRC study demonstrated that encorafenib (Enco)+cetuximab (Cetux)±binimetinib (Bini) significantly improved overall survival (OS) versus Cetux + chemotherapy in previously treated patients with BRAF-V600E-mutant mCRC, providing the basis for the approval of the Enco+Cetux regimen in the United States and the European Union. These findings support treatment with Enco+Cetux±Bini for patients with BRAF-V600E-mutant mCRC and provide insights into the biology of response and resistance to MAPK-pathway-targeted therapy. ClinicalTrials.gov registration: NCT02928224.

The molecular heterogeneity of this condition has significantly increased in complexity over recent years, marked by the identification of baseline co-alterations and development of a broad spectrum of resistance mechanisms post-EGFR tyrosine kinase inhibitor (TKI) therapy. This complexity poses a substantial challenge to clinicians. Despite the rapid advancement of targeted therapies and the implementation of treatment escalation through combination strategies, there remains an ongoing debate regarding which patients would benefit most from combination therapies, both in the initial treatment phase and in the setting of disease progression, particularly when off-target resistance mechanisms or co-alterations are identified.

P2, N=25, Recruiting, Jeeyun Lee | Trial completion date: Dec 2025 --> Dec 2026 | Trial primary completion date: Dec 2024 --> Dec 2025

P1/2, N=68, Not yet recruiting, Cancer Hospital Chinese Academy of Medical Sciences; Cancer Hospital Chinese Academy of Medical Sciences

P4, N=20, Recruiting, The First Affiliated Hospital, Zhejiang University School of Medicine; The First Affiliated Hospital, Zhejiang University School of Medicine | Not yet recruiting --> Recruiting

P1/2, N=231, Active, not recruiting, Regeneron Pharmaceuticals | N=82 --> 231 | Trial completion date: Oct 2024 --> Jan 2032 | Trial primary completion date: Oct 2024 --> Jan 2032

Yet, to our knowledge, we present herein the first case of ALK + NSCLC rapidly progressing on 1 st line Brigatinib treatment due to de novo MET- amplification. The recognition of this mechanism of ALK-TKI resistance by FISH, especially in NGS-negative cases, should be considered before initiating 1 st line treatment. This is of clinical importance, as effective combined therapy with ALK-TKI and MET-inhibitor is feasible.

Conclusions : To our knowledge, this is the largest liquid biopsy analysis comparing common/uncommon ex19dels in NSCLC and shows similar genomic findings across groups. Further work should be done to explore additional genomic and non-genomic factors to aid in patient selection for EGFR TKIs for uncommon findings.

Acquired MoR was identified in 45% of liquid biopsies in the largest prospective dataset studying MoR to RET inhibition. On-target MoR including RET SF G810 muts were more common in MTC than NSCLC. Bypass MoR (30%) included RAS/RAF activating and potentially targetable MET amps.

Combining plasma sequencing and tumor biopsy analysis uncovers additional resistance mechanisms compared to a single modality approach, highlighting the importance of combining both modalities for a complete assessment of resistance mechanisms and associated treatment options.

4 pts received TT at recurrence, within clinical trials: one with grade 3 meningioma and ALK rearrangement treated with alectinib, one with PTCH1 mutant medulloblastoma treated with vismodegib, and two with high TMB treated with nivolumab/ipilumumab. The incidence of targettable molecular alterations in adult CNS tumor pts was lower than in GBM. Nevertheless, in a few selected cases TT have the potential to increase treatment options at recurrence and improve outcomes.

Ami+laz had significantly lower rates of EGFR and MET resistance alterations with trends for lower rates of TP53 resistance mutations and RB1 loss compared with osi. These initial findings suggest that first-line ami+laz is changing the biology of acquired resistance and demonstrate clear proof of mechanism with potent inhibition of resistance via the EGFR and MET pathways.

All cases harbored variants in key oncogenes or oncosuppressors and druggable alterations in more than one third of them. Five out of nine patients had a high TMB unrelated to microsatellite instability. TMB may serve as biomarker for immunotherapy-based strategies in mismatch repair proficient/microsatellite stable mCRC.

Although a histopathologically diverse subset of tumors, papillary RCC is canonically associated with amplification of the MET protooncogene; recently completed and ongoing trials have investigated MET-directed therapies for this patient population. Finally, we discuss the unique biology of RCC with sarcomatoid dedifferentiation and the recent clinical findings detailing its paradoxical sensitivity to ICIs.

P1/2, N=111, Ongoing, Regeneron Pharmaceuticals, Inc.

Five patients were treated with matched targeted therapy, with three having durable benefit: (i) erlotinib for EGFR-altered tumor, followed by osimertinib/capmatinib when MET amplification emerged (first-line therapy); (ii) pralsetinib for RET fusion (fifth line); and (iii) dabrafenib/trametinib for BRAF N486_P490del (third line). Sustained therapeutic benefit can be achieved in a real-world setting in a subset of patients with advanced/metastatic KRAS-WT PDAC treated with chemotherapy-free matched targeted agents. Prospective studies are warranted.

P2; N=84 --> 12

P4, N=182, Completed, AstraZeneca | Recruiting --> Completed

In H1993-derived resistant cells, MEK inhibitors could be a potential therapeutic strategy for overcoming resistance with downstream mitogen-activated protein kinase pathway activation. In this study, we revealed the different mechanisms of acquired resistance to the MET inhibitor crizotinib with potential therapeutic application in patients with MET-amplified lung carcinoma.

Crizotinib showed a clinical activity similar to that of tepotinib and capmatinib in patients with NSCLC harboring MET exon 14 skipping mutations.

ORR was consistent regardless of timing of immunohistochemistry sample collection. Further investigations are required in larger studies.

In the two MET amplified groups, the secondary amp was less effective. This study may provide more research support for the treatment of these patients.