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Supplementary Figures 1-14; Supplementary Tables 1-3 from A Monoclonal Antibody to ADAM17 Inhibits Tumor Growth by Inhibiting EGFR and Non–EGFR-Mediated Pathways

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posted on 2023-04-03, 14:24 authored by Jonathan Rios-Doria, Darrin Sabol, Jon Chesebrough, Dave Stewart, Linda Xu, Ravinder Tammali, Li Cheng, Qun Du, Kevin Schifferli, Ray Rothstein, Ching Ching Leow, Jenny Heidbrink-Thompson, Xiaofang Jin, Changshou Gao, Jay Friedman, Brandy Wilkinson, Melissa Damschroder, Andrew J. Pierce, Robert E. Hollingsworth, David A. Tice, Emil F. Michelotti
<p>Supplementary Figures 1-14; Supplementary Tables 1-3. Supplementary Figure 1. Lead antibody 80PH3 is a potent inhibitor of recombinant ADAM17 Supplementary Figure 2. 80PH3 is not a potent inhibitor of cellular ADAM17 Supplementary Figure 3. MEDI3622 is highly selective for ADAM17 and does not inhibit ADAM10 or MMP12 Supplementary Figure 4. MEDI3622 does not compete for binding to cellular ADAM17 with the ADAM17 monoclonal antibody 9301 Supplementary Figure 5. MEDI3622 inhibits cellular mouse ADAM17 Supplementary Figure 6. Cell surface levels of HER pathway proteins in OE21 esophageal cancer cells Supplementary Figure 7. The half-life of MEDI3622 in rats is approximately 8 days Supplementary Figure 8. Several phosphorylation sites in EGFR are inhibited by MEDI3622 Supplementary Figure 9. Exposure to MEDI3622 reduces levels of phospho-SRC and phospho-YES Supplementary Figure 10. Percent activated EGFR predicts cetuximab sensitivity in a series of Head and Neck PDX models Supplementary Figure 11. Proliferation of COLO205 colon cancer cells is independent of the HER pathways Supplementary Figure 12. MEDI3622 does not inhibit HER pathways in Colo205 tumors Supplementary Figure 13. Predictive value of ADAM17, EGFR, HER2, and HER3 mRNA levels for sensitivity of cell lines to MEDI3622 Supplementary Figure 14. Sensitivity to MEDI3622 is not predicted my mRNA levels of ADAM1, HER2 OR HER3 in head and neck PDX models Supplementary Table 1. Correlation of MEDI3622 and cetuximab anti-proliferative activity Supplementary Table 2. Identification of ADAM17 substrates in COLO205 cells by SILAC proteomics Supplementary Table 3. Identification of ADAM17 substrates in H358 lung cancer cells by SILAC proteomics</p>

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ARTICLE ABSTRACT

ADAM17 is the primary sheddase for HER pathway ligands. We report the discovery of a potent and specific ADAM17 inhibitory antibody, MEDI3622, which induces tumor regression or stasis in many EGFR-dependent tumor models. The inhibitory activity of MEDI3622 correlated with EGFR activity both in a series of tumor models across several indications as well in as a focused set of head and neck patient–derived xenograft models. The antitumor activity of MEDI3622 was superior to that of EGFR/HER pathway inhibitors in the OE21 esophageal model and the COLO205 colorectal model suggesting additional activity outside of the EGFR pathway. Combination of MEDI3622 and cetuximab in the OE21 model was additive and eradicated tumors. Proteomics analysis revealed novel ADAM17 substrates that function outside of the HER pathways and may contribute toward the antitumor activity of the monoclonal antibody. Mol Cancer Ther; 14(7); 1637–49. ©2015 AACR.