Biohaven 'Positive Degrader Data with Potential First-in-Class' autoimmune therapy

 Biohaven Ltd. (NYSE: BHVN) ("Biohaven"), a global clinical-stage biopharmaceutical company focused on the discovery, development and commercialization of life-changing therapies to treat a broad range of rare and common diseases, today highlighted the success of BHV-1300, its potential first-in-class IgG_1,2,4 selective degrader, in achieving rapid and deep reductions in total IgG, advancing a novel and transformative MoDE platform molecule for the potential treatment of autoimmune disease.

In the four-week Phase 1 study, subcutaneously administered BHV-1300 at a dose of 1000 mg weekly achieved rapid, deep and sustained reductions in total IgG of up to 84%, with a median reduction of 80% (Figure 1). Reductions occurred within hours of each dose, were progressive, and were sustained compared to baseline over the four-week period.

Tova Gardin, MD, MPP, Chief Translational Officer at Biohaven, commented, "BHV-1300 has demonstrated remarkable efficacy in deep lowering of total IgG, leveraging the groundbreaking technology of the MoDE platform, to potentially revolutionize treatment of patients with autoimmune disease. Biohaven's unique extracellular degrader technology leverages the body's natural hepatic clearance mechanism to remove targeted antibodies contributing to disease and promises to usher in a new era of tunable, selective and self-administered immune therapy."

BHV-1300 was safe and well-tolerated in subcutaneous doses up to 2000 mg with no clinically significant increases in ALT, AST, or bilirubin, no clinically significant reductions in albumin, and no clinically significant increases in cholesterol over the four-week dosing period compared to placebo. There were no clinically significant reductions in IgG₃, IgA, IgE, or IgM compared to baseline. Most AEs were mild and self-resolving, there were no discontinuations due to AEs related to study drug, and there were no serious or severe AEs. The Phase 1 study is ongoing with plans to continue to escalate multiple doses to explore the full range of targeted IgG lowering possible with this technology to customize an ideal treatment approach for different disease indications.

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