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Supplementary Figures 1-7 from Genome-Wide Interrogation of Human Cancers Identifies EGLN1 Dependency in Clear Cell Ovarian Cancers

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posted on 2023-03-31, 01:46 authored by Colles Price, Stanley Gill, Zandra V. Ho, Shawn M. Davidson, Erin Merkel, James M. McFarland, Lisa Leung, Andrew Tang, Maria Kost-Alimova, Aviad Tsherniak, Oliver Jonas, Francisca Vazquez, William C. Hahn

Supplementary Figure 1 identifies EGLN1 as a cancer dependency in RNAi and CRISPR datasets and contains all significant associations. Supplementary Figure 2 is a lineage analysis of EGLN1 dependency within RNAi dataset. Supplementary Figure 3 is an immunoblot showing EGLN1 knockout in EGLN1-insensitive cell line. Supplementary Figure 4 shows pan-EGLN inhibition affects proliferation and apoptosis. Supplementary Figure 5 shows specific EGLN1 inhibitor IOX2 and VHL inhibitor VH298 inhibit proliferation. Supplementary Figure 6 shows differentially expressed genes in EGLN1-KO cells. Supplementary Figure 7 shows increased apoptosis in vivo when inhibiting EGLN1 or VHL.

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NIH

NCI

the H.L. Synder Foundation

National Cancer Institute

Carlos Slim Foundation

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ARTICLE ABSTRACT

We hypothesized that candidate dependencies for which there are small molecules that are either approved or in advanced development for a nononcology indication may represent potential therapeutic targets. To test this hypothesis, we performed genome-scale loss-of-function screens in hundreds of cancer cell lines. We found that knockout of EGLN1, which encodes prolyl hydroxylase domain-containing protein 2 (PHD2), reduced the proliferation of a subset of clear cell ovarian cancer cell lines in vitro. EGLN1-dependent cells exhibited sensitivity to the pan-EGLN inhibitor FG-4592. The response to FG-4592 was reversed by deletion of HIF1A, demonstrating that EGLN1 dependency was related to negative regulation of HIF1A. We also found that ovarian clear cell tumors susceptible to both genetic and pharmacologic inhibition of EGLN1 required intact HIF1A. Collectively, these observations identify EGLN1 as a cancer target with therapeutic potential. These findings reveal a differential dependency of clear cell ovarian cancers on EGLN1, thus identifying EGLN1 as a potential therapeutic target in clear cell ovarian cancer patients.

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