Pharmacokinetics, Safety and Tolerability Study of AVT04 to EU Approved and US Licensed Stelara (Ustekinumab)

Summary

Participation Requirements

Description

Overall Design: This study is designed as a FIH, multicenter, randomized, double-blind, 3-arm, parallel-group study of AVT04 compared with EU-approved and US-licensed Stelara when administered as a single 45 mg/0.5 mL SC injection in healthy adult subjects. Subjects will undertake a Screening visit ...

Overall Design: This study is designed as a FIH, multicenter, randomized, double-blind, 3-arm, parallel-group study of AVT04 compared with EU-approved and US-licensed Stelara when administered as a single 45 mg/0.5 mL SC injection in healthy adult subjects. Subjects will undertake a Screening visit between Day -28 and Day -1 to determine their eligibility in the study. Subjects who meet the eligibility criteria will be admitted to the study site on the day prior to dosing (Day -1), during which their continued eligibility will be assessed up to Day 1 prior to dosing. On Day 1, eligible subjects will be randomized and will receive a single dose of one of the following: AVT04, US licensed Stelara, or EU approved Stelara. A staggered sentinel dosing strategy will be implemented as a safety measure, with equal numbers of subjects randomized to each treatment: Sentinel Group 1 (n = 3 subjects [1 per group]), Sentinel Group 2 (n = 6 subjects [2 per group]), and Sentinel Group 3 (n = 9 subjects [3 per group]). Following investigational product (IP) administration, there will be at least 72 hours of close observation and safety monitoring by the Principal Investigator (PI) for each subject and between sentinel groups (ie, 72 hours should have elapsed following IP administration for the last subject in each sentinel group). Provided there are no significant safety or tolerability concerns (or events that meet the study stopping criteria) in the previous sentinel group following a safety review and discussion between the PI, Medical Monitor, and Sponsor, the next sentinel group of subjects will be randomized and dosed. Once the IP dose is deemed to be safe and well tolerated in all 3 sentinel groups, the remaining subjects (n = 276 subjects [92 subjects per group]) will be randomized and dosed. Sentinel subjects will remain confined to the study site from Day -1 to Day 4 (72 hours postdose); all remaining subjects will be confined to the study site from Day -1 up to Day 2 (24 hours postdose). Following dosing, PK, safety, tolerability, and other assessments will be performed according to the Schedule of Assessments. Subjects will return to the study site on an outpatient basis daily up to Day 12, then once a week from Day 15 to Day 64, followed by once every 2 weeks up to Day 78, and finally on Day 92 for the End-of-Study (EOS) visit. Number of Subjects: Approximately 294 healthy subjects (98 per group) are planned to be enrolled at multiple study sites in New Zealand and Australia. Efforts will be made to include at least 10% of subjects (30 subjects, approximately 10 per group) who are of Japanese origin or ethnicity (defined as a second-generation Japanese person living abroad or born in Japan; and both parents and grandparents are of Japanese origin). A total of 45 subjects (15 per group) are planned to be included in the exploratory ex-vivo biomarker sub study. Treatment Groups and Duration: Eligible subjects will be randomly assigned in a 1:1:1 ratio to receive a single 45 mg/0.5 mL SC dose of ustekinumab as AVT04 (test product) or US licensed Stelara or EU approved Stelara (reference products) on Day 1. Randomization will be stratified by ethnicity and body weight at Day -1 as follows: Japanese, non Japanese ?80 kg, and non-Japanese >80 kg. The study duration per subject will be approximately 17 weeks. The study will consist of a 4 week Screening period, a 13-week treatment period and assessment period, and an EOS visit on Day 92. Study Stopping Criteria: If either of the following scenarios occur, study enrollment and dosing will be halted: If >2 subjects experience a suspected unexpected serious adverse reaction (defined as an adverse event [AE] that is serious, unexpected, and considered related to the IP). If the Sponsor or Investigator considers there to be an unfavorable benefit-risk ratio based on emerging safety data. If following consultation between the PI, Medical Monitor, and Sponsor, it is considered appropriate to restart study drug administration in the remaining subjects, justification will be submitted to the Health and Disability Ethics Committee/Human Research Ethics Committee for restarting the study.

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