Amgen announced the U.S. Food and Drug Administration (FDA) has approved RIABNI™ (rituximab-arrx), a biosimilar to Rituxan® (rituximab), for the treatment of adult patients with Non-Hodgkin's Lymphoma (NHL), Chronic Lymphocytic Leukemia (CLL), Granulomatosis with Polyangiitis (GPA) (Wegener's Granulomatosis), and Microscopic Polyangiitis (MPA). RIABNI will be made available in the U.S. in January 2021.
"The approval of RIABNI represents an important milestone across our biosimilar and oncology portfolios," said Murdo Gordon, executive vice president of Global Commercial Operations at Amgen. "Following the proven success of KANJINTI® (trastuzumab-anns) and MVASI® (bevacizumab-awwb) in the U.S. marketplace, RIABNI reaffirms Amgen's long-term commitment to providing high quality biosimilars that can potentially offer more affordable, effective treatment options for cancer and other serious diseases and that contribute to the sustainability of healthcare systems."
RIABNI, a CD20-directed cytolytic antibody, was proven to be highly similar to Rituxan based on a totality of evidence, which included comparative analytical, nonclinical and clinical data, with no clinically meaningful differences in safety or effectiveness. The data package was composed of, in part, results from a pharmacokinetic (PK) similarity study and a comparative clinical study.
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The randomized, double-blind, comparative clinical study evaluated the efficacy, pharmacokinetics (PK), pharmacodynamics (PD), safety, tolerability and immunogenicity of RIABNI compared to Rituxan in subjects with grade 1, 2, or 3a follicular B-cell NHL and low tumor burden. There were 256 patients enrolled and randomized (1:1) to receive 375 mg/m2 intravenous infusion of either RIABNI or Rituxan, once weekly for 4 weeks followed by dosing at weeks 12 and 20. The primary endpoint, an assessment of overall response rate (ORR) by week 28, was within the prespecified margin for RIABNI compared to Rituxan, showing clinical equivalence. PK, PD, safety and immunogenicity of RIABNI were similar to Rituxan.
Amgen has a total of 10 biosimilars in its portfolio, five of which have been approved in the U.S., and three that are approved in the European Union (EU).
RIABNI is a biosimilar to Rituxan, an anti-CD20 monoclonal antibody. The active ingredient of RIABNI is a monoclonal antibody that has the same amino acid sequence as Rituxan. RIABNI also has the same strength as Rituxan, and the dosage form and route of administration are identical to the IV formulation of Rituxan.