JJP Biologics Announces Positive Interim Phase 1b Data for Nebaprubart (JJP-1212), an Anti-CD89 Antagonist, in Linear IgA Disease (LAD)

Warsaw, Poland – June 03, 2026 – JJP Biologics, ("JJPBio" or the "Company") a clinical-stage, immune-focused biotech that engineers precision antibodies to correct derailed immune pathways that drive autoimmune diseases and cancer, today announces positive interim data from its ongoing Phase 1b trial evaluating nebaprubart, also known as JJP-1212, its investigational potential first-in-class anti-CD89 antagonist, in patients diagnosed with Linear IgA Disease (LAD), a rare autoantibody-mediated skin disease.