This Phase 1b basket trial will investigate the safety, tolerability, pharmacokinetics, pharmacodynamics, immunogenicity and preliminary efficacy of RAY121, a inhibitor of classical complement pathway, after multiple dose administration in patients with immunological diseases such as antiphospholipid syndrome (APS), bullous pemphigoid (BP), Behçet's Syndrome (BS), dermatomyositis (DM), immune-mediated necrotizing myopathy (IMNM) and immune thrombocytopenia (ITP).
Signed informed consent form
Age >= 18 and <=75 at the time of signing informed consent form (except for BP; Age >=18 and <= 85 with Karnofsky score >= 60% at screening)
Ability to comply with the study protocol
For women of childbearing potential: agreement to remain abstinent (refrain from heterosexual intercourse) or use highly effective contraceptive methods
History of anaphylaxis or hypersensitivity to a biologic agent
Active infection requiring systemic antiviral, antibiotics or antifungal
Planned surgery during the study
Pregnant or breastfeeding, or intending to become pregnant