PMID- 35570983 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20220716 IS - 2468-0249 (Electronic) IS - 2468-0249 (Linking) VI - 7 IP - 5 DP - 2022 May TI - Safety, Tolerability, Pharmacokinetics, and Pharmacodynamics of VIS649 (Sibeprenlimab), an APRIL-Neutralizing IgG(2) Monoclonal Antibody, in Healthy Volunteers. PG - 993-1003 LID - 10.1016/j.ekir.2022.01.1073 [doi] AB - INTRODUCTION: VIS649 (sibeprenlimab), a humanized IgG(2) monoclonal antibody that inhibits APRIL, is being developed as a potential treatment for IgA nephropathy (IgAN). This phase 1, first-in-human, randomized, double-blind, single ascending dose study aimed to evaluate the safety, pharmacokinetics (PK), and pharmacodynamics (PD) of VIS649 in healthy adults. METHODS: Participants were randomized to VIS649 (sequential i.v. dosing cohorts: 0.5, 2.0, 6.0, 12.0 mg/kg) or placebo; a further cohort received VIS649 6.0 mg/kg or placebo followed by a tetanus/diphtheria vaccine challenge. RESULTS: A total of 51 participants were randomized, dosed, and analyzed for safety (7 for each VIS649 dose; 8 for placebo; 10 for VIS649 + vaccine; 5 for placebo + vaccine). There were no serious adverse events (AEs) or AEs leading to study discontinuation. VIS649 had nonlinear PK: half-life increased with dose and drug exposure increased in a greater than dose-proportional manner. Serum APRIL, IgA, galactose-deficient (Gd) IgA(1), IgG, and IgM were reversibly suppressed in a dose-dependent manner, with a dose-response in time to recovery. Tetanus and diphtheria serum IgG titers increased after recall vaccination. CONCLUSION: VIS649 was safe, well tolerated, and reversibly suppressed APRIL and various immunoglobulins, without loss of antigen-specific vaccination response. Further clinical development of VIS649 for IgAN is warranted. Trial registration: ClinicalTrials.gov: NCT03719443. CI - (c) 2022 International Society of Nephrology. Published by Elsevier Inc. FAU - Mathur, Mohit AU - Mathur M AD - Visterra, Inc., Waltham, Massachusetts, USA. FAU - Barratt, Jonathan AU - Barratt J AD - John Walls Renal Unit, Leicester General Hospital, Leicester, UK. FAU - Suzuki, Yusuke AU - Suzuki Y AD - Department of Nephrology, Juntendo University Faculty of Medicine, Tokyo, Japan. FAU - Engler, Frank AU - Engler F AD - Certara USA, Inc., Princeton, New Jersey, USA. FAU - Pasetti, Marcela F AU - Pasetti MF AD - Center for Vaccine Development, University of Maryland School of Medicine, Baltimore, Maryland, USA. FAU - Yarbrough, Jill AU - Yarbrough J AD - Visterra, Inc., Waltham, Massachusetts, USA. FAU - Sloan, Susan AU - Sloan S AD - Visterra, Inc., Waltham, Massachusetts, USA. FAU - Oldach, David AU - Oldach D AD - Visterra, Inc., Waltham, Massachusetts, USA. LA - eng SI - ClinicalTrials.gov/NCT03719443 PT - Journal Article DEP - 20220208 PL - United States TA - Kidney Int Rep JT - Kidney international reports JID - 101684752 PMC - PMC9091613 OTO - NOTNLM OT - APRIL OT - IgA nephropathy OT - clinical trial OT - galactose-deficient IgA OT - glomerulonephritis OT - monoclonal antibody EDAT- 2022/05/17 06:00 MHDA- 2022/05/17 06:01 PMCR- 2022/02/08 CRDT- 2022/05/16 03:53 PHST- 2021/12/10 00:00 [received] PHST- 2022/01/27 00:00 [revised] PHST- 2022/01/31 00:00 [accepted] PHST- 2022/05/16 03:53 [entrez] PHST- 2022/05/17 06:00 [pubmed] PHST- 2022/05/17 06:01 [medline] PHST- 2022/02/08 00:00 [pmc-release] AID - S2468-0249(22)01135-4 [pii] AID - 10.1016/j.ekir.2022.01.1073 [doi] PST - epublish SO - Kidney Int Rep. 2022 Feb 8;7(5):993-1003. doi: 10.1016/j.ekir.2022.01.1073. eCollection 2022 May.