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Truncated FGFR2 is a clinically actionable oncogene in multiple cancers. | LitMetric

AI Article Synopsis

Article Abstract

Somatic hotspot mutations and structural amplifications and fusions that affect fibroblast growth factor receptor 2 (encoded by FGFR2) occur in multiple types of cancer. However, clinical responses to FGFR inhibitors have remained variable, emphasizing the need to better understand which FGFR2 alterations are oncogenic and therapeutically targetable. Here we apply transposon-based screening and tumour modelling in mice, and find that the truncation of exon 18 (E18) of Fgfr2 is a potent driver mutation. Human oncogenomic datasets revealed a diverse set of FGFR2 alterations, including rearrangements, E1-E17 partial amplifications, and E18 nonsense and frameshift mutations, each causing the transcription of E18-truncated FGFR2 (FGFR2). Functional in vitro and in vivo examination of a compendium of FGFR2 and full-length variants pinpointed FGFR2-E18 truncation as single-driver alteration in cancer. By contrast, the oncogenic competence of FGFR2 full-length amplifications depended on a distinct landscape of cooperating driver genes. This suggests that genomic alterations that generate stable FGFR2 variants are actionable therapeutic targets, which we confirmed in preclinical mouse and human tumour models, and in a clinical trial. We propose that cancers containing any FGFR2 variant with a truncated E18 should be considered for FGFR-targeted therapies.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9436779PMC
http://dx.doi.org/10.1038/s41586-022-05066-5DOI Listing

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