Purpose: The Phase 3 Mylight study was designed to confirm clinical equivalence of proposed biosimilar aflibercept (SOK583A1; Sandoz [proposed biosimilar aflibercept, SDZ-AFL]) to its reference biologic (Eylea; Regeneron Pharmaceuticals, Inc; Bayer AG [reference aflibercept, Ref-AFL]).

Method: Mylight was a prospective, double-masked, 2-arm, parallel Phase 3 study. Participants with neovascular age-related macular degeneration were randomized 1:1 to receive eight injections of SDZ-AFL (n = 244) or Ref-AFL (n = 240) over 48 weeks. The primary endpoint was mean change in best-corrected visual acuity score from baseline to Week 8. Secondary endpoints included anatomical outcomes, best-corrected visual acuity at Weeks 24 and 52, safety, and pharmacokinetics.

Results: Similarity in mean change in best-corrected visual acuity score was established between SDZ-AFL (n = 235) and Ref-AFL (n = 226) at Week 8 (difference: -0.3 [90% CI, -1.5 to 1.0]) and Week 52. No clinically meaningful differences occurred between groups in anatomical outcomes. Safety profiles were similar, with comparable incidences of treatment-related adverse events (SDZ-AFL: 2.5%; Ref-AFL: 2.9%). The incidence of anti-drug antibodies was similar between groups. Systemic free aflibercept concentrations 24 hours postdose were low and comparable between SDZ-AFL and Ref-AFL.

Conclusion: Proposed biosimilar aflibercept matched reference aflibercept in efficacy, safety, and pharmacokinetics in participants with neovascular age-related macular degeneration. Therefore, this Phase 3 study confirmed biosimilarity of SDZ-AFL to Ref-AFL.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11398290PMC
http://dx.doi.org/10.1097/IAE.0000000000004174DOI Listing

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