Apogee Therapeutics Announces Positive Interim Phase 1 Results from Healthy Volunteer Trial of APG333, its Novel Half-Life Extended TSLP Antibody

Core Insights - Apogee Therapeutics announced positive interim Phase 1 results for APG333, demonstrating a half-life of approximately 55 days and suppression of key biomarkers for 6 months after a single dose, supporting potential 3- and 6-month dosing regimens [1][2][5] - APG333 was well tolerated across all cohorts with doses up to 1,000 mg, with the most common treatment-emergent adverse events being headache and upper respiratory tract infection [5][6] Company Overview - Apogee Therapeutics is a clinical-stage biotechnology company focused on developing optimized, novel biologics for inflammatory and immunology (I&I) markets, including treatments for Atopic Dermatitis, asthma, and Chronic Obstructive Pulmonary Disease [5][6] - The company aims to achieve best-in-class profiles through its antibody programs by targeting established mechanisms of action and utilizing advanced antibody engineering [6] Clinical Trial Details - The Phase 1 clinical trial for APG333 was a double-blind, placebo-controlled study involving 32 healthy adults across four cohorts, evaluating safety, tolerability, and pharmacokinetics [2][3] - Results indicate that APG333's pharmacokinetic profile supports potential dosing two to four times a year, which is a significant improvement over current standard treatments [3][5] Future Development - The positive results from APG333 support the development of a co-formulation with APG777, potentially allowing for quarterly or less frequent dosing to address respiratory diseases more effectively [1][2][3] - The combination of APG777 and APG333 is expected to suppress complementary pathways involved in obstructive airway disease, expanding treatment options for patients [3][5]