About this trial
This study is divided into two parts (Part A and Part B). This study aims to evaluate the safety and efficacy of CM313 in subjects with primary Immunoglobulin A nephropathy(IgAN), while also observing its Pharmacokinetics(PK) characteristics, Pharmacokinetics(PD) effects, and immunogenicity.
Eligibility criteria
Qualifiers
Able to comprehend the research study and voluntarily signing the informed consent form (ICF).
Renal biopsy report supporting diagnosis of primary IgAN within 8 years prior to the screening visit.
Estimated Glomerular Filtration Rate (eGFR) (using the Chronic Kidney Disease Epidemiology Collaboration formula) ≥ 30 mL/min/1.73 (m*m) at screening and baseline.
Prior to the baseline visit, all subjects must have received standard care treatment, including good blood pressure control and a stable treatment of a maximum recommended or maximum tolerated dose of angiotensin-converting enzyme inhibitors(ACEI) or Angiotensin receptor blocker(ARB) for at least 12 weeks.
Disqualifiers
Secondary IgAN judged by the investigator: Secondary IgAN may be associated with Henoch-Schonlein purpura, hepatic cirrhosis, coeliac disease, human immunodeficiency virus (HIV) infection, dermatitis herpetiformis, seronegative arthritis, small cell carcinoma, lymphoma, disseminated tuberculosis, obliterative bronchiolitis, inflammatory bowel disease, familial Mediterranean fever, etc.
Known allergy to monoclonal antibody drugs or to the excipients of CM313.
Presence of rapidly progressive glomerulonephritis (RPGN), defined as 50% decline in eGFR within 3 months prior to randomization and/or crescent formation in more than 50% of glomeruli in a renal pathological specimen.
Confirmed acute kidney injury (AKI) within 4 weeks prior to randomization.
Trial design
Treatments tested in this trial
- CM313
- Placebo
Treatment groups
8
Treatment groupsSee each treatment group below.