Preliminary results from the SAVANNAH phase II trial showed that Tagrisso (osimertinib) plus savolitinib demonstrated an objective response rate (ORR) of 49% (95% confidence interval [CI], 39-59%) in patients with epidermal growth factor receptor-mutated (EGFRm) non-small cell lung cancer (NSCLC) with high levels of MET overexpression and/or amplification, defined as IHC90+ and/or FISH10+, whose disease progressed on treatment with Tagrisso. The highest ORR was observed in patients with high levels of MET who were not treated with prior chemotherapy (52% [95% CI, 41-63%]). In patients whose tumours did not show high levels of MET, the ORR was 9% (95% CI, 4-18%). These results are being shared at the International Association for the Study of Lung Cancer 2022 World Conference on Lung Cancer, taking place 6-9 August in Vienna, Austria. Savolitinib, marketed in China under the brand name Orpathys, is an oral, potent, and highly selective MET tyrosine kinase inhibitor (TKI) being jointly developed and commercialised by AstraZeneca and Hutchmed. While EGFR-targeted therapy can provide a durable survival benefit to patients with EGFRm NSCLC, most will eventually develop resistance to their treatment, with MET being the most common resistance biomarker. Among patients screened for enrolment in SAVANNAH, all of whom experienced disease progression on Tagrisso, 62% had tumours with MET overexpression and/or amplification, and more than one-third (34%) met the defined high MET level cut-off. Myung-Ju Ahn, MD, PhD, Professor of Hemato-Oncology at the Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea, and Principal Investigator in the SAVANNAH phase II trial, said:
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