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- W4361824738 abstract "<div>Abstract<p>Small cell lung cancer (SCLC) remains a recalcitrant disease where limited therapeutic options have not improved overall survival, and approved targeted therapies are lacking. Amplification of the tyrosine kinase receptor FGFR1 (fibroblast growth factor receptor 1) is one of the few actionable alterations found in the SCLC genome. However, efforts to develop targeted therapies for <i>FGFR1</i>-amplified SCLC are hindered by critical gaps in knowledge around the molecular origins and mediators of FGFR1-driven signaling as well as the physiologic impact of targeting FGFR1. Here we show that increased FGFR1 promotes tumorigenic progression in precancerous neuroendocrine cells and is required for SCLC development <i>in vivo</i>. Notably, <i>Fgfr1</i> knockout suppressed tumor development in a mouse model lacking the retinoblastoma-like protein 2 (<i>Rbl2</i>) tumor suppressor gene but did not affect a model with wild-type <i>Rbl2</i>. In support of a functional interaction between these two genes, loss of RBL2 induced FGFR1 expression and restoration of RBL2 repressed it, suggesting a novel role for RBL2 as a regulator of FGFR1 in SCLC. Additionally, FGFR1 activated phospholipase C gamma 1 (PLCG1), whereas chemical inhibition of PLCG1 suppressed SCLC growth, implicating PLCG1 as an effector of FGFR1 signaling in SCLC. Collectively, this study uncovers mechanisms underlying FGFR1-driven SCLC that involve RBL2 upstream and PLCG1 downstream, thus providing potential biomarkers for anti-FGFR1 therapy.</p>Significance:<p>This study identifies RBL2 and PLCG1 as critical components of amplified FGFR1 signaling in SCLC, thus representing potential targets for biomarker analysis and therapeutic development in this disease.</p></div>" @default.
- W4361824738 created "2023-04-05" @default.
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- W4361824738 date "2023-03-31" @default.
- W4361824738 modified "2023-09-28" @default.
- W4361824738 title "Data from FGFR1 Is Critical for RBL2 Loss–Driven Tumor Development and Requires PLCG1 Activation for Continued Growth of Small Cell Lung Cancer" @default.
- W4361824738 doi "https://doi.org/10.1158/0008-5472.c.6512283.v1" @default.
- W4361824738 hasPublicationYear "2023" @default.
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