Here we screened a panel of over 70 tumor cell lines derived from various solid tumor malignancies for both EGFR expression by flow cytometry and sensitivity to cell growth inhibition by HTI-1511 in vitro....A separate study in a NSCLC (KRASmut) PDX model demonstrated a dose dependent response with greater than 100% TGI at 1.0 and 3.0 mg/kg (both p<0.05, and also p<0.05 to a non-cognate antibody ADC control).…These results support further development of HTI-1511 as a possible treatment for EGFR overexpressing tumors, including those with downstream activating mutations in the KRAS/BRAF pathway.