AVT03 With Xgeva in Healthy Male Subjects

Phase 1

Completed

Brief Summary: This study has been designed as a randomized, double-blind, parallel-group study and in healthy adult male subjects of age 28 years to 55 years old. The study will assess the PK, safety and tolerability of AVT03 compared to US-Xgeva when administered as a single 120 mg SC dose

Detailed Description: The study will consist of screening period, a 196 day (28 weeks) treatment and assessment period, and an End of Study (EOS) visit on week 32 on Day 196. Subjects will undertake a screening visit between Day -28 and Day -1 to determine their eligibility for 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 120mg AVT03 or 120mg Xgeva as subcutaneous injection.

Recruitment & Eligibility

Inclusion Criteria

Capable of giving signed informed consent, which includes compliance with the requirements and restrictions listed in the informed consent form (ICF) and in this protocol.
Male subjects who are 28 to 55 years old, inclusive, at the time of signing the ICF.
Have a body weight of 50.0 to 90.0 kg (inclusive) and body mass index of 17.0 to 32 kg/m2 at Screening and Day -1.

Exclusion Criteria

Evidence of clinically relevant pathology, especially prior diagnosis of bone disease, or any uncontrolled condition that will affect bone metabolism such as, but not limited to: osteoporosis, osteogenesis imperfecta, hyperparathyroidism,, non-controlled hyperthyroidism osteomalacia, rheumatoid arthritis, psoriatic arthritis, ankylosing spondylitis, current flare-up of osteoarthritis and/or gout, active malignancy, renal disease, Paget's disease of the bone, malabsorption syndrome.
Have osteonecrosis of the jaw (ONJ) or risk factors for ONJ such as invasive dental procedures (e.g., tooth extraction, dental implants, oral surgery) or intend to undergo such procedures during the study period, poor oral hygiene, periodontal, and/or pre-existing dental disease.
Have bone fractures, presence of active healing fractures, or recent bone fracture
Abnormal serum calcium.
Known vitamin D deficiency.

Arm && Interventions

Group	Intervention	Description
Experimental Arm AVT03 120mg	AVT03	AVT03 is the proposed biosimilar for Xgeva (denosumab). Subjects in this arm will receive a single 120mg dose of AVT03 as a subcutaneous injection
Active Comparator Xgeva 120mg	Denosumab	Xgeva (denosumab) is the proposed active comparator for AVT03. Subjects in this arm will receive a single 120mg dose of Xgeva (denosumab) as a subcutaneous injection

Primary Outcome Measures

Name	Time	Method
Co-primary PK endpoint_AUC0-t: Area Under the Serum Concentration-time Curve up to Time t, Where t is the Last Time Point With a Concentration Above the Lower Limit of Quantitation	Day 1 (pre-dose, 8h and 12h post-dose), Day 2 to Day 13 (daily), Day 15, Day 18, Day 22, Day 25, Day 29, Day 43, Day 57, Day 71, Day 85, Day 99, Day 112, Day 126, Day 141, Day 162 and Day 196 (week 28) / End of study	Samples will be collected for measurement
Co-primary PK Endpoint Cmax: Maximum Serum Concentration	Day 1 (pre-dose, 8h and 12h post-dose), Day 2 to Day 13 (daily), Day 15, Day 18, Day 22, Day 25, Day 29, Day 43, Day 57, Day 71, Day 85, Day 99, Day 112, Day 126, Day 141, Day 162 and Day 196 (week 28) / End of study	Samples will be collected for measurement

Secondary Outcome Measures

Name	Time	Method
Immunogenicity Presence of ADAs and Presence of nAbs Against AVT03 and Xgeva	Day 1, Day 8, Day 15, Day 29, Day 57, Day 71, Day 112, Day 141, Day 196/EoS	Samples will be collected for measurement
PK_ AUC0-inf: Comprised of AUC0-t and AUC Extrapolated From Time t to Time Infinity.	Day 1 (pre-dose, 8h and 12h post-dose), Day 2 to Day 13 (daily), Day 15, Day 18, Day 22, Day 25, Day 29, Day 43, Day 57, Day 71, Day 85, Day 99, Day 112, Day 126, Day 141, Day 162 and Day 196 (week 28) / End of study	Samples will be collected for measurement
Safety Incidence, Nature and Severity of Adverse Events.	Day 1(week 1) to Day 196 (week 28)]