Comparison of Pharmacokinetics, Pharmacodynamics, Safety, and Tolerability of Bmab 1000 and Prolia® in Normal Healthy Volunteers: DENARIUS: DENosumab Pharmacokinetic equivAlence tRIal in Healthy volUnteerS

This study will consist of 2 study periods: Screening period (4 weeks) and Treatment period (Dosing and follow-up).

In this double-blind, 2-arm study, the eligible subjects will be randomized in a 1:1 ratio to receive either Bmab 1000 or Prolia® on Day 1. The interventions (Bmab 1000 or Prolia®) will be administered subcutaneously. End-of-study visit will be at Week 36 post randomization.

The total duration of study participation for a subject will be up to 40 weeks.

Inclusion criteria

• Gender: Male or Female
• Age: Male subjects: 28-55 years, inclusive at screening; Female subjects: 28-45 years, inclusive at screening.
• Weight: For non-Japanese subjects 60.0-95.0 kg, inclusive at screening. For Japanese subjects 55.0-95.0 kg, inclusive at screening.
• Body mass index (BMI) between 18.0 and 30.0 kg/m2, inclusive, at screening.
• Vital signs showing no clinically relevant deviations according to the Investigator's judgment or their designee's. In the case of subjects > 45 year-old, if a value of SBP above 145 mmHg is confirmed on rechecking the BP after a period of rest, this subject will not be included in the study.
• 12-lead ECG recording without signs of clinically relevant pathology or showing no clinically relevant deviations as judged by the Investigator or their designee.

Exclusion criteria

• Evidence of clinically relevant pathology: Like have a history of and/or current clinically significant gastrointestinal, renal, hepatic, cardiovascular, haematological, pulmonary, neurologic, metabolic, psychiatric disorder, drug or alcohol abuse, or allergic disease excluding mild asymptomatic seasonal allergies. Have a history of malignancy (including lymphoma, leukaemia, and skin cancer).
• Unable to follow protocol instructions or not likely to complete the study in the opinion of the Investigator or their designee.
• History of relevant drug and/or food allergies (including hypersensitivity to any recombinant protein drug or any of the constituents of denosumab, or latex allergy or hereditary problems of fructose intolerance).
• Known history of previous exposure to denosumab.
• Have previously been exposed to a monoclonal antibody or fusion protein (other than denosumab) within 270 days (or 5 half-lives whichever is the longest) prior to randomization and/or there is confirmed evidence or clinical suspicion of immunogenicity from previous exposure to a monoclonal antibody or fusion protein.
• Prior diagnosis of bone disease, or any condition that will affect bone metabolism such as, but not limited to: osteoporosis, osteogenesis imperfect, hyperparathyroidism, hyperthyroidism, hypothyroidism, osteomalacia, rheumatoid arthritis, psoriatic arthritis, ankylosing spondylitis, current flare-up of osteoarthritis and/or gout, active malignancy, renal disease (defined as glomerular filtration rate < 60 mL/min), Paget's disease of the bone, recent bone fracture (within 6 months), malabsorption syndrome.
• Any use of the following bone modifying medications, with no limitation on time since administration: e.g.intravenous bisphosphonates, strontium, fluoride (if administered in treatment of osteoporosis),romosozumab, teriparatide or any parathyroid hormone analogs, calcitonin, and cinacalcet.