Visterra Initiates Phase 1 Clinical Study of VIS649

Visterra announced the initiation of a Phase 1 clinical study with VIS649 in healthy volunteers. VIS649 is a monoclonal antibody targeting the B-cell growth factor APRIL (A Proliferation Inducing Ligand) for the potential treatment of imumuglobulin A nephropathy (IgA nephropathy or IgAN), one of the most common kidney diseases other than those caused by diabetes or high blood pressure.

"We are excited to initiate clinical study with VIS649, a potential therapy tailored specifically to IgA nephropathy, a kidney disease for which there are no approved therapies," said Brian J.G. Pereira, M.D., president and chief executive officer of Visterra. "The current standard of care for progressive IgA nephropathy calls for use of corticosteroids, which are associated with undesirable side effects that can limit their use. A new treatment strategy with an improved benefit/risk profile would be considered a welcome addition by patients and physicians alike."

"VIS649 is a first-in-class monoclonal antibody of the IgG2 subclass and was designed to target the cytokine APRIL, which we believe is an optimal target for the treatment of IgAN," said David Oldach, M.D., Visterra’s chief medical officer. "Previously reported preclinical data in multiple animal models support clinical evaluation of VIS649 as a treatment for IgAN based on its demonstrated potential to reduce both circulating IgA levels and proteinuria, while also suggesting a favorable safety profile."

This first-in-human phase 1, randomized, placebo-controlled, double-blind, single ascending dose study will assess the safety of VIS649 in up to 45 healthy subjects. The study will be conducted in up to 5 sequential dosing cohorts at escalating dose levels. Safety, pharmacokinetic (PK) and pharmacodynamic (PD) data from the initial cohorts will be assessed.

VIS649 is an IgG2 monoclonal antibody designed and engineered using the company’s Hierotope platform to target the cytokine APRIL (A Proliferation Inducing Ligand) and neutralize its biological activity. VIS649 is in clinical development as a potential treatment for IgA nephropathy. Preclinical data demonstrate the potential of VIS649 to reduce circulating IgA levels and proteinuria, while suggesting a favorable safety profile.