Pharmacokinetics, pharmacodynamics, safety, and immunogenicity of a biosimilar of denosumab (LY06006): a randomized, double-blind, single-dose, parallel-controlled clinical study in healthy Chinese subjects

To compare the pharmacokinetics (PK), pharmacodynamics (PD), safety, and immunogenicity of LY06006 (denosumab biosimilar) and denosumab in healthy Chinese adult male subjects.In this randomized, double-blind, parallel-controlled, single-dose, comparative biosimilar study, a total of 168 subjects received 60 mg of LY06006 or denosumab by subcutaneous (SC) abdominal injections in a 1:1 ratio with a follow-up period of 168 days.After a single SC abdominal injection of 60 mg LY06006/denosumab, the geometric mean ratio of the main pharmacokinetic parameters, Cmax and AUC0-∞, of the two drugs were 97.57% and 104.27%, respectively; the geometric mean ratio of the main pharmacodynamic parameters AUEC0-t and Emax, were 101.00% and 99.64%, respectively, and the 90% confidence interval was observed to be within 80-125%. The subjects in the test group (LY06006) and control group (denosumab) were all negative for anti-drug antibody (ADA). The incidence and severity of treatment-emergent adverse events (TEAEs)were similar for both groups, and no grade 3 or higher TEAEs occurred in either group.This study demonstrated that LY06006 and denosumab have similar characteristics and bioequivalence in pharmacokinetics. Moreover, they had similar pharmacodynamic profiles, safety, and immunogenicity.www.clinicaltrials.gov identifier is NCT04973722.