Study design1*

Graph depicting the study design for the GOMOSDI pharmacokinetics clinical trial
  • A first-in-human, randomized, double-blind, single-dose, parallel-group, 3-arm study assessing the pharmacokinetics, safety, tolerability, and immunogenicity of a single dose of GOMOSDI compared with Simponi in 336 healthy adults, including a subgroup of people of Japanese origin
  • The study design reflects exclusion of the EU-approved Simponi arm (n=111); GOMOSDI and US-approved Simponi arms included 115 and 110 randomized participants, respectively

Key endpoints1

  • Primary pharmacokinetics parameters (Cmaxand AUC0-inf) contained within the prespecified 80%-125% bioequivalence margins
  • Comparison of serum golimumab concentrations over time
  • Comparisons of safety and immunogenicity profiles

*Study used both EU- and US-approved Simponi, but only the US arm results are shown here.

AUC0-inf=area under the drug concentration–time curve from time zero to infinity; Cmax=maximum serum concentration.

Pharmacokinetics results supported biosimilarity1

SIMILARITY ASSESSMENT OF PHARMACOKINETIC PARAMETERS*†

Chart showing similarity of pharmacokinetics parameters for GOMOSDI and Simponi in the pharmacokinetics study
  • Primary pharmacokinetic parameters were similar between GOMOSDI and Simponi and were contained within the
    prespecified bioequivalence margins of 80% and 125%
  • Results were consistent in the Japanese subgroup

MEAN SERUM GOLIMUMAB CONCENTRATION–TIME PROFILES*

Chart showing similar mean golimumab serum concentrations for GOMOSDI and Simponi  in the pharmacokinetics study

*Study used both EU- and US-approved Simponi, but only the US arm results are shown here.

Pharmacokinetics similarity was demonstrated if the 90% CIs for the geometric LS means ratios were entirely contained within the equivalence margins of 80% and 125%.

AUC0-inf=area under the drug concentration–time curve from time zero to infinity; CI=confidence interval; Cmax=maximum serum concentration; LS=least squares; SD=standard deviation.

The safety profiles of GOMOSDI and Simponi supported biosimilarity1

TEAEs*

Table showing treatment-emergent adverse events for GOMOSDI and Simponi during the pharmacokinetics study

*Study used both EU- and US-approved Simponi, but only the US arm results are shown here.

TEAE=treatment-emergent adverse event.

GOMOSDI demonstrated comparable immunogenicity to Simponi1

Comparable immunogenicity is essential to demonstrating biosimilarity, since ADAs and NAbs can reduce exposure to the biosimilar and thereby affect efficacy and safety2,3

  • In the pharmacokinetics study, immunogenicity was measured up to Day 751
  • The formation of ADAs and NAbs trended similarly in both treatment groups, with the highest positivity rate at Day 751

DETECTED ADAs1*

Table showing detected antidrug antibodies for GOMOSDI and Simponi during the biosimilarity study

DETECTED NAbs1*

Table showing detected neutralizing antibodies for GOMOSDI and Simponi during the biosimilarity study

*Study used both EU- and US-approved Simponi, but only the US arm results are shown here.
ADA=antidrug antibody; NAb=neutralizing antibody.

EXPLORE THE BIOSIMILARITY STUDY FOR GOMOSDI

REFERENCE:

1. Wynne C, Lorch U, Krantz E, et al. Pharmacokinetic similarity of biosimiliar AVT05 versus reference product golimumab in healthy adults: a double-blind, three-arm, parallel-group study. BioDrugs. 2026;40(1):121-133.

REFERENCE:

1. Wynne C, Lorch U, Krantz E, et al. Pharmacokinetic similarity of biosimiliar AVT05 versus reference product golimumab in healthy adults: a double-blind, three-arm, parallel-group study. BioDrugs. 2026;40(1):121-133.

REFERENCE:

1. Wynne C, Lorch U, Krantz E, et al. Pharmacokinetic similarity of biosimiliar AVT05 versus reference product golimumab in healthy adults: a double-blind, three-arm, parallel-group study. BioDrugs. 2026;40(1):121-133.

REFERENCES:

1. Wynne C, Lorch U, Krantz E, et al. Pharmacokinetic similarity of biosimiliar AVT05 versus reference product golimumab in healthy adults: a double-blind, three-arm, parallel-group study. BioDrugs. 2026;40(1):121-133. 2. Biosimilar product regulatory review and approval. US Food & Drug Administration. Accessed February 19, 2026. https://www.fda.gov/files/drugs/published/Biosimilar-Product-Regulatory-Review-and-Approval.pdf 3. Shankar G, Arkin S, Cocea L, et al. Assessment and reporting of the clinical immunogenicity of therapeutic proteins and peptides—harmonized terminology and tactical recommendations. AAPS J. 2014;16(4):658-673.