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Study to Compare the Pharmacokinetics, Pharmacodynamics, Safety, Tolerability, and Immunogenicity of Biosimilar Denosumab With Prolia® in Healthy Adult Male Volunteers

A Randomized, Double-blind, Three-arm, Parallel-group, Single-dose Study to Compare the Pharmacokinetics, Pharmacodynamics, Safety, Tolerability, and Immunogenicity of Denosumab (ENZ215, EU-sourced Prolia®, and US-sourced Prolia®) in Healthy Adult Male Volunteers

Status
Completed
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05245669
Enrollment
207
Registered
2022-02-18
Start date
2022-01-10
Completion date
2024-05-22
Last updated
2025-12-23

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Healthy Male Subjects

Brief summary

This is a randomized, double-blind, three-arm, parallel-group, single-dose study to demonstrate bioequivalence of ENZ215 and EU- and US-sourced Prolia after a single 60-mg dose administered subcutaneously in healthy adult male volunteers.

Detailed description

Approximately 207 subjects will be enrolled into 3 groups (69 in each group) in parallel. The subjects may be enrolled in multiple groups at the site. All eligible subjects will be assigned to one of the three treatment groups in 1:1:1 ratio i.e. ENZ215 or US-sourced Prolia® or EU-sourced Prolia® to enter into the study period of 39 weeks. The study duration will be approximately 16 months (i.e. 6 months of recruitment period, 4 weeks of screening period and approximately 39 weeks (270 days) of study period). Each subject will be required to visit the site for a total of 20 visits: visit 1 - screening visit, visit 2 - day 0 to day 2, visit 3 - day 3, visit 4 - day 4, visit 5 - day 5, visit 6 - day 6, visit 7 - day 8, visit 8 - day 10, visit 9 - day 12, visit 10 - day 16, visit 11 - day 21, visit 12 - day 28 (week 4), visit 13 - day 42 (week 6), visit 14 - day 63 (week 9), visit 15 - day 90 (week 13), visit 16 - day 119 (week 17), visit 17 - day 147 (week 21), visit 18 - day 180 (week 26), visit 19 day - 224 (week 32), and visit 20 - day 270 (week 39). A window period of ±1 day is allowed for visit 12 (day 28), window period of ±3 days are allowed from day 42 (week 6) to day 180 (week 26), A window period of ±5 days are allowed from day 224 (week 32) to day 270 (week 39). End of Study Assessment will be performed on day 270 (week 39) or at the time of early discontinuation of the subject.

Interventions

BIOLOGICALENZ215

healthy volunteers receive ENZ215 (60mg) once

BIOLOGICALEU Sourced Prolia

healthy volunteers receive Denosumab (60mg) once

BIOLOGICALUS Sourced Prolia

healthy volunteers receive Denosumab (60mg) once

Sponsors

Alkem Laboratories Ltd
CollaboratorINDUSTRY
Enzene Biosciences Ltd.
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
DOUBLE (Subject, Investigator)

Intervention model description

Arm 1: ENZ215 Arm 2 : EU Sourced Prolia Arm 3: US Sourced Prolia

Eligibility

Sex/Gender
MALE
Age
28 Years to 55 Years
Healthy volunteers
Yes

Inclusion criteria

The subjects will be included in the study based on the following criteria: 1. Able to understand and give written, voluntary informed consent for the study 2. Healthy adult male volunteers between 28 to 55 years of age (both inclusive) 3. Body Mass Index (BMI) ≥ 18.50 and ≤ 30.00 kg/m2 at the time of screening 4. Medically healthy with no clinically significant medical history, vital signs, physical examination, and laboratory profiles 5. Normal or clinically acceptable 12-lead electrocardiogram, QT interval corrected for heart rate (QTc interval)\* ≤ 450 msec at the time of screening 6. Subjects with negative alcohol test (breath analyzer or any suitable test) at the time of screening and admission (pre-dose) 7. Male subjects with female partners who agree to use effective contraception during study# 8. Male subjects who agree not to donate sperm during study 9. Willing and able to comply with the protocol requirements 10. Willing for multiple sampling and admission at the phase 1 study site day before dosing. * Note: QTc interval will be calculated using the Bazette and Fridericia formula. * Effective contraception: A non-vasectomised Male volunteers with female partners of child bearing potential should use dual method of contraception i.e. condom with spermicide method of contraception. Female partners should use hormonal or non-hormonal method of contraception. (No restrictions are required for a vasectomised male provided his vasectomy has been performed 4 months or more prior to the first dosing. A male who has been vasectomised less than 4 months prior to the first dosing must follow the same restrictions as a non-vasectomised male).

Exclusion criteria

The subjects will be excluded from the study based on the following criteria: 1. Known hypersensitivity to Denosumab or to any of the components of the study drug 2. Participating or has received any investigational drug (or is currently using an investigational device) within 30 days before receiving the study drug, or at least 10 times the respective elimination halflife (whichever period is longer) \* \* For monoclonal antibody refer

Design outcomes

Primary

MeasureTime frameDescription
Area Under the Drug Concentration-time Curve From Day 0 to Day 270 (AUC0-t) of ENZ215, EU- and US-sourced Prolia®. and EU- and US-sourced Prolia®270 daysA total of twenty four blood PK samples of 2.5 mL each were collected from each subject in the study. Pre-dose sample were collected within 30 minutes prior to IP administration. Post-dose samples up to Day 2 were collected within ± 10 minutes, within ± 2 hours from Day 3 to Day 21, within ± 1 day on Day 28, within ± 3 days from Day 42 to Day 180 and within ±5 days from Day 224 to Day 270. Serum concentrations of denosumab were measured at central laboratory by a validated analytical method.
Area Under the Drug Concentration-time Curve From Time 0 to Infinity (AUC0-inf) of ENZ215, EU- and US-sourced Prolia®. and EU- and US-sourced Prolia®270 daysA total of twenty four blood PK samples of 2.5 mL each were collected from each subject in the study. Pre-dose sample were collected within 30 minutes prior to IP administration. Post-dose samples up to Day 2 were collected within ± 10 minutes, within ± 2 hours from Day 3 to Day 21, within ± 1 day on Day 28, within ± 3 days from Day 42 to Day 180 and within ±5 days from Day 224 to Day 270. Serum concentrations of denosumab were measured at central laboratory by a validated analytical method.
Maximum Observed Drug Concentration (Cmax) of ENZ215 and EU- and US-sourced Prolia®270 daysA total of twenty four blood PK samples of 2.5 mL each were collected from each subject in the study. Pre-dose sample were collected within 30 minutes prior to IP administration. Post-dose samples up to Day 2 were collected within ± 10 minutes, within ± 2 hours from Day 3 to Day 21, within ± 1 day on Day 28, within ± 3 days from Day 42 to Day 180 and within ±5 days from Day 224 to Day 270. Serum concentrations of denosumab were measured at central laboratory by a validated analytical method.

Secondary

MeasureTime frameDescription
Terminal Elimination Half-life (t1/2)270 dayst1/2 was compared between ENZ215 and Prolia® using tests after log-transformation wherever appropriate.
Area Under the Effect Curve (AUEC) From Time 0 to Day 270 for Serum CTX-1 Percent Inhibition Percent Inhibition270 daysThe AUEC was calculated as the area under the effect curve from baseline until CTX-1 values return to baseline for the first time. A total of sixteen (16) blood samples for serum CTX-1 estimation of 3.5 mL each was collected from each subject in the study. For CTX-1, blood samples were collected at the same time and after a minimum of 10 hours of fasting.
Apparent Systemic Clearance (CL/F)270 daysCL/F was compared between ENZ215 and Prolia® using tests after log-transformation wherever appropriate.
Partial Area Under the Drug Concentration-time Curve From Time 0 (Pre-dose) to Day 2828 daysAUC0-28 days were compared between ENZ215 and Prolia® using tests after log-transformation wherever appropriate.
Time to Reach Cmax (Tmax)270 daysThe non-parametric analysis was used for the comparison of tmax between ENZ215 and Prolia®.

Other

MeasureTime frameDescription
Number of Subjects Who Developed Denosumab Neutralizing Antibodies and Antidrug Antibodies. Antibodies270 daysA total of 10 blood Immunogenicity assessment samples of 5.0 mL for NAb and ADA were collected from each subject in the study. The frequency and percentage of positive ADA or NAb result was provided. The proportion of positive ADA or NAb in each treatment group was compared using chi-square or Fisher's exact tests. The p-value, relative risk, and corresponding 95% CI was presented.
Incidence of Adverse Events270 daysAdverse events and SAEs as and when occurred, were properly recorded, evaluated, managed, and reported from signing informed consent till end of Study Assessment visit. All AEs were summarized using appropriate medical coding dictionary.

Countries

Bulgaria, Poland

Participant flow

Participants by arm

ArmCount
ENZ215
ENZ215 is the proposed biosimilar for Prolia® (denosumab). Subjects in this arm received a single 60 mg dose of ENZ215 as a subcutaneous injection. ENZ215 (denosumab biosimilar) : Single dose of 60mg SC administered
68
EU Sourced Prolia
EU-Prolia® (denosumab) is the proposed active comparator for ENZ215. Subjects in this arm received a single 60 mg dose of EU-Prolia® as a subcutaneous injection. EU-Prolia® : Single dose of 60mg SC administered
69
US Licensed Prolia
US-Prolia® (denosumab) is the proposed active comparator for ENZ215. Subjects in this arm received a single 60 mg dose of US-Prolia® as a subcutaneous injection. US-Prolia® : Single dose of 60mg SC administered
70
Total207

Baseline characteristics

CharacteristicENZ215EU Sourced ProliaUS Licensed ProliaTotal
Age, Continuous37.9 Years
STANDARD_DEVIATION 8.1
38.9 Years
STANDARD_DEVIATION 7.7
40.1 Years
STANDARD_DEVIATION 7.8
39.0 Years
STANDARD_DEVIATION 7.9
BMI26.219 kg/m^2
STANDARD_DEVIATION 2.601
26.260 kg/m^2
STANDARD_DEVIATION 2.76
25.562 kg/m^2
STANDARD_DEVIATION 2.835
26.010 kg/m^2
STANDARD_DEVIATION 2.74
Height178.39 cm
STANDARD_DEVIATION 6.22
178.96 cm
STANDARD_DEVIATION 6.44
178.41 cm
STANDARD_DEVIATION 7.69
178.59 cm
STANDARD_DEVIATION 6.79
Race/Ethnicity, Customized
Asian
1 Participants0 Participants0 Participants1 Participants
Race/Ethnicity, Customized
White
67 Participants69 Participants70 Participants206 Participants
Sex: Female, Male
Female
0 Participants0 Participants0 Participants0 Participants
Sex: Female, Male
Male
68 Participants69 Participants70 Participants207 Participants
Weight83.62 kg
STANDARD_DEVIATION 10.75
84.16 kg
STANDARD_DEVIATION 10.34
81.56 kg
STANDARD_DEVIATION 11.67
83.10 kg
STANDARD_DEVIATION 10.94

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
deaths
Total, all-cause mortality
0 / 680 / 690 / 69
other
Total, other adverse events
28 / 6839 / 6932 / 69
serious
Total, serious adverse events
0 / 681 / 690 / 69

Outcome results

Primary

Area Under the Drug Concentration-time Curve From Day 0 to Day 270 (AUC0-t) of ENZ215, EU- and US-sourced Prolia®. and EU- and US-sourced Prolia®

A total of twenty four blood PK samples of 2.5 mL each were collected from each subject in the study. Pre-dose sample were collected within 30 minutes prior to IP administration. Post-dose samples up to Day 2 were collected within ± 10 minutes, within ± 2 hours from Day 3 to Day 21, within ± 1 day on Day 28, within ± 3 days from Day 42 to Day 180 and within ±5 days from Day 224 to Day 270. Serum concentrations of denosumab were measured at central laboratory by a validated analytical method.

Time frame: 270 days

Population: Pharmacokinetic population includes subjects who complied sufficiently with the protocol, who received a single-dose of the study drug and had 1 pre-dose and at least 1 post-dose measurement of any of the PK assessment not impacted by any protocol deviations.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
ENZ215Area Under the Drug Concentration-time Curve From Day 0 to Day 270 (AUC0-t) of ENZ215, EU- and US-sourced Prolia®. and EU- and US-sourced Prolia®7508134.18 h*ng/mLGeometric Coefficient of Variation 36.8
EU Sourced ProliaArea Under the Drug Concentration-time Curve From Day 0 to Day 270 (AUC0-t) of ENZ215, EU- and US-sourced Prolia®. and EU- and US-sourced Prolia®7674912.81 h*ng/mLGeometric Coefficient of Variation 24.9
US Licensed ProliaArea Under the Drug Concentration-time Curve From Day 0 to Day 270 (AUC0-t) of ENZ215, EU- and US-sourced Prolia®. and EU- and US-sourced Prolia®7842297.13 h*ng/mLGeometric Coefficient of Variation 28.8
Primary

Area Under the Drug Concentration-time Curve From Time 0 to Infinity (AUC0-inf) of ENZ215, EU- and US-sourced Prolia®. and EU- and US-sourced Prolia®

A total of twenty four blood PK samples of 2.5 mL each were collected from each subject in the study. Pre-dose sample were collected within 30 minutes prior to IP administration. Post-dose samples up to Day 2 were collected within ± 10 minutes, within ± 2 hours from Day 3 to Day 21, within ± 1 day on Day 28, within ± 3 days from Day 42 to Day 180 and within ±5 days from Day 224 to Day 270. Serum concentrations of denosumab were measured at central laboratory by a validated analytical method.

Time frame: 270 days

Population: Pharmacokinetic population includes subjects who complied sufficiently with the protocol, who received a single-dose of the study drug and had 1 pre-dose and at least 1 post-dose measurement of any of the PK assessment not impacted by any protocol deviations.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
ENZ215Area Under the Drug Concentration-time Curve From Time 0 to Infinity (AUC0-inf) of ENZ215, EU- and US-sourced Prolia®. and EU- and US-sourced Prolia®7622698.42 h*ng/mLGeometric Coefficient of Variation 36.4
EU Sourced ProliaArea Under the Drug Concentration-time Curve From Time 0 to Infinity (AUC0-inf) of ENZ215, EU- and US-sourced Prolia®. and EU- and US-sourced Prolia®7779487.60 h*ng/mLGeometric Coefficient of Variation 24.7
US Licensed ProliaArea Under the Drug Concentration-time Curve From Time 0 to Infinity (AUC0-inf) of ENZ215, EU- and US-sourced Prolia®. and EU- and US-sourced Prolia®7934699.65 h*ng/mLGeometric Coefficient of Variation 28.9
Primary

Maximum Observed Drug Concentration (Cmax) of ENZ215 and EU- and US-sourced Prolia®

A total of twenty four blood PK samples of 2.5 mL each were collected from each subject in the study. Pre-dose sample were collected within 30 minutes prior to IP administration. Post-dose samples up to Day 2 were collected within ± 10 minutes, within ± 2 hours from Day 3 to Day 21, within ± 1 day on Day 28, within ± 3 days from Day 42 to Day 180 and within ±5 days from Day 224 to Day 270. Serum concentrations of denosumab were measured at central laboratory by a validated analytical method.

Time frame: 270 days

Population: Pharmacokinetic population includes subjects who complied sufficiently with the protocol, who received a single-dose of the study drug and had 1 pre-dose and at least 1 post-dose measurement of any of the PK assessment not impacted by any protocol deviations.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
ENZ215Maximum Observed Drug Concentration (Cmax) of ENZ215 and EU- and US-sourced Prolia®7662.99 ng/mlGeometric Coefficient of Variation 32.6
EU Sourced ProliaMaximum Observed Drug Concentration (Cmax) of ENZ215 and EU- and US-sourced Prolia®7742.64 ng/mlGeometric Coefficient of Variation 23.2
US Licensed ProliaMaximum Observed Drug Concentration (Cmax) of ENZ215 and EU- and US-sourced Prolia®8033.14 ng/mlGeometric Coefficient of Variation 24.9
Secondary

Apparent Systemic Clearance (CL/F)

CL/F was compared between ENZ215 and Prolia® using tests after log-transformation wherever appropriate.

Time frame: 270 days

Population: Pharmacokinetic population includes subjects who complied sufficiently with the protocol, who received a single-dose of the study drug and had 1 pre-dose and at least 1 post-dose measurement of any of the PK assessment not impacted by any protocol deviations.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
ENZ215Apparent Systemic Clearance (CL/F)0.008 mL/hGeometric Coefficient of Variation 36.4
EU Sourced ProliaApparent Systemic Clearance (CL/F)0.008 mL/hGeometric Coefficient of Variation 24.7
US Licensed ProliaApparent Systemic Clearance (CL/F)0.008 mL/hGeometric Coefficient of Variation 28.9
Secondary

Area Under the Effect Curve (AUEC) From Time 0 to Day 270 for Serum CTX-1 Percent Inhibition Percent Inhibition

The AUEC was calculated as the area under the effect curve from baseline until CTX-1 values return to baseline for the first time. A total of sixteen (16) blood samples for serum CTX-1 estimation of 3.5 mL each was collected from each subject in the study. For CTX-1, blood samples were collected at the same time and after a minimum of 10 hours of fasting.

Time frame: 270 days

Population: Pharmacodynamic population includes subjects who complied sufficiently with the protocol, who received a single-dose of the study drug and had 1 pre-dose and at least 1 post-dose measurement of any of the PD assessment.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
ENZ215Area Under the Effect Curve (AUEC) From Time 0 to Day 270 for Serum CTX-1 Percent Inhibition Percent Inhibition432174.780 h*%Geometric Coefficient of Variation 20.1
EU Sourced ProliaArea Under the Effect Curve (AUEC) From Time 0 to Day 270 for Serum CTX-1 Percent Inhibition Percent Inhibition442806.204 h*%Geometric Coefficient of Variation 13.6
US Licensed ProliaArea Under the Effect Curve (AUEC) From Time 0 to Day 270 for Serum CTX-1 Percent Inhibition Percent Inhibition436622.000 h*%Geometric Coefficient of Variation 18.6
Secondary

Partial Area Under the Drug Concentration-time Curve From Time 0 (Pre-dose) to Day 28

AUC0-28 days were compared between ENZ215 and Prolia® using tests after log-transformation wherever appropriate.

Time frame: 28 days

Population: Pharmacokinetic population includes subjects who complied sufficiently with the protocol, who received a single-dose of the study drug and had 1 pre-dose and at least 1 post-dose measurement of any of the PK assessment not impacted by any protocol deviations

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
ENZ215Partial Area Under the Drug Concentration-time Curve From Time 0 (Pre-dose) to Day 283608894.44 h*ng/mLGeometric Coefficient of Variation 28.9
EU Sourced ProliaPartial Area Under the Drug Concentration-time Curve From Time 0 (Pre-dose) to Day 283721138.61 h*ng/mLGeometric Coefficient of Variation 20.6
US Licensed ProliaPartial Area Under the Drug Concentration-time Curve From Time 0 (Pre-dose) to Day 283796048.41 h*ng/mLGeometric Coefficient of Variation 22.5
Secondary

Terminal Elimination Half-life (t1/2)

t1/2 was compared between ENZ215 and Prolia® using tests after log-transformation wherever appropriate.

Time frame: 270 days

Population: Pharmacokinetic population includes subjects who complied sufficiently with the protocol, who received a single-dose of the study drug and had 1 pre-dose and at least 1 post-dose measurement of any of the PK assessment not impacted by any protocol deviations.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
ENZ215Terminal Elimination Half-life (t1/2)450.745 hoursGeometric Coefficient of Variation 28.3
EU Sourced ProliaTerminal Elimination Half-life (t1/2)450.207 hoursGeometric Coefficient of Variation 23.2
US Licensed ProliaTerminal Elimination Half-life (t1/2)441.262 hoursGeometric Coefficient of Variation 27.1
Secondary

Time to Reach Cmax (Tmax)

The non-parametric analysis was used for the comparison of tmax between ENZ215 and Prolia®.

Time frame: 270 days

ArmMeasureValue (MEDIAN)
ENZ215Time to Reach Cmax (Tmax)120.62 hours
EU Sourced ProliaTime to Reach Cmax (Tmax)120.08 hours
US Licensed ProliaTime to Reach Cmax (Tmax)120.28 hours
Other Pre-specified

Incidence of Adverse Events

Adverse events and SAEs as and when occurred, were properly recorded, evaluated, managed, and reported from signing informed consent till end of Study Assessment visit. All AEs were summarized using appropriate medical coding dictionary.

Time frame: 270 days

Population: Total 207 subjects randomized i.e. in 68 subjects in ENZ215, 70 subjects in US-Prolia® \& 69 subjects in EU-Prolia® randomized. However, in US-Prolia® 69 subjects dosed as 1 subject withdrawn his consent before dosing, in ENZ215 \& EU-Prolia® all randomized subjects dosed. Hence in US-Prolia® 69 subjects, EU-Prolia® 69 subjects \& ENZ215 68 subjects evaluated in the study.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
ENZ215Incidence of Adverse Events28 Participants
EU Sourced ProliaIncidence of Adverse Events39 Participants
US Licensed ProliaIncidence of Adverse Events32 Participants
Other Pre-specified

Number of Subjects Who Developed Denosumab Neutralizing Antibodies and Antidrug Antibodies. Antibodies

A total of 10 blood Immunogenicity assessment samples of 5.0 mL for NAb and ADA were collected from each subject in the study. The frequency and percentage of positive ADA or NAb result was provided. The proportion of positive ADA or NAb in each treatment group was compared using chi-square or Fisher's exact tests. The p-value, relative risk, and corresponding 95% CI was presented.

Time frame: 270 days

Population: Total 207 subjects randomized i.e. in 68 subjects in ENZ215, 70 subjects in US-Prolia® \& 69 subjects in EU-Prolia® randomized. However, in US-Prolia® 69 subjects dosed as 1 subject withdrawn his consent before dosing, in ENZ215 \& EU-Prolia® all randomized subjects dosed. Hence in US-Prolia® 69 subjects, EU-Prolia® 69 subjects \& ENZ215 68 subjects evaluated in the study.~Number subjects showed nAb.

ArmMeasureGroupValue (NUMBER)
ENZ215Number of Subjects Who Developed Denosumab Neutralizing Antibodies and Antidrug Antibodies. AntibodiesADA positive subjects68 participants
ENZ215Number of Subjects Who Developed Denosumab Neutralizing Antibodies and Antidrug Antibodies. AntibodiesnAb positive subjects3 participants
EU Sourced ProliaNumber of Subjects Who Developed Denosumab Neutralizing Antibodies and Antidrug Antibodies. AntibodiesADA positive subjects69 participants
EU Sourced ProliaNumber of Subjects Who Developed Denosumab Neutralizing Antibodies and Antidrug Antibodies. AntibodiesnAb positive subjects3 participants
US Licensed ProliaNumber of Subjects Who Developed Denosumab Neutralizing Antibodies and Antidrug Antibodies. AntibodiesADA positive subjects69 participants
US Licensed ProliaNumber of Subjects Who Developed Denosumab Neutralizing Antibodies and Antidrug Antibodies. AntibodiesnAb positive subjects2 participants

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026