ALX Oncology Doses First Patient in Phase 1 Dose Escalation Trial Evaluating ADC ALX2004 for the Treatment of EGFR-Expressing Solid Tumors

Core Insights - ALX2004 is a potential best- and first-in-class antibody-drug conjugate (ADC) designed for treating EGFR-expressing solid tumors, with components optimized to maximize the therapeutic window [1][4] - The first patient has been dosed in the Phase 1 clinical trial for ALX2004, marking a significant milestone for ALX Oncology [2][3] - Initial safety data from the trial is expected in the first half of 2026 [1][3] Company Overview - ALX Oncology is a clinical-stage biotechnology company focused on developing novel therapies for cancer treatment [6] - The company’s lead candidate, evorpacept, is being evaluated in multiple clinical trials across various cancer indications [6] Clinical Trial Details - The Phase 1 clinical trial (NCT07085091) is an open-label multicenter study targeting advanced or metastatic EGFR-expressing solid tumors, including non-small cell lung cancer, head and neck squamous cell carcinoma, esophageal squamous cell carcinoma, and colorectal cancer [3][5] - The trial consists of a Phase 1a dose escalation followed by a Phase 1b dose expansion [3] Preclinical Data - Preclinical studies indicate that ALX2004 has a differentiated linker-payload construct, demonstrating superior stability and dose-dependent anti-tumor activity [5] - The preclinical model findings suggest a favorable safety profile, with no EGFR-related skin toxicity or payload-related interstitial lung disease observed at clinically relevant doses [5]