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Study to Compare the Anti-tetanus Neutralizing Antibody Titers and Safety of TNM002 Injection With Human Tetanus Immunoglobulin or Placebo in Adult Volunteers

A Multicenter, Randomized, Double-Blind, Parallel-Controlled, Dose-Finding Phase II Study to Compare the Anti-tetanus Neutralizing Antibody Titers and Safety of TNM002 Injection With Human Tetanus Immunoglobulin or Placebo Following a Single Intramuscular Injection in Chinese Adult Volunteers

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05625477
Enrollment
240
Registered
2022-11-23
Start date
2022-04-18
Completion date
2022-10-18
Last updated
2025-09-16

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

Conditions

Tetanus

Brief summary

The primary objective is to compare the anti-tetanus neutralizing antibody titers of TNM002 Injection with human tetanus immunoglobulin (HTIG) following a single intramuscular (IM) injection in Chinese adult volunteers.

Interventions

BIOLOGICALTNM002 (low dose)

Single dose of TNM002 administered by intramuscular injection

BIOLOGICALTNM002 (medium dose)

Single dose of TNM002 administered by intramuscular injection

BIOLOGICALTNM002 (high dose)

Single dose of TNM002 administered by intramuscular injection

BIOLOGICALHTIG

Single dose of HTIG administered by intramuscular injection

BIOLOGICALPlacebo

Single dose of placebo administered by intramuscular injection

Sponsors

Zhuhai Trinomab Pharmaceutical Co., Ltd.
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
TRIPLE (Subject, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
Yes

Inclusion criteria

1. Chinese male or female adults aged ≥ 18 years; 2. Healthy volunteers or volunteers with stable chronic diseases; 3. Volunteers who provide signed written informed consent form.

Exclusion criteria

1. History of allergy to the investigational product, human immunoglobulin preparation or any component of other therapeutic monoclonal immunoglobulins; 2. Any clinically significant chronic or acute medical condition that makes the volunteer unsuitable for participation; 3. History of alcohol or other substance abuse.

Design outcomes

Primary

MeasureTime frameDescription
Proportion of Volunteers With an Increase of Anti-tetanus Neutralizing Antibody Titers Over Protective LevelAt 24 hours post-doseThe increase of anti-tetanus neutralizing antibody titers were defined as ΔTiters, calculated as the post-administration antibody titers minus the baseline antibody titers. The antibody protective level is ΔTiters \>0.01 IU/mL.

Secondary

MeasureTime frameDescription
Proportion of Volunteers With an Increase of Anti-tetanus Neutralizing Antibody Titers Over Protective LevelAt 48 hours and on Days 3, 7, 21, 30, and 90 post-doseThe increase of anti-tetanus neutralizing antibody titers were defined as ΔTiters, calculated as the post-administration antibody titers minus the baseline antibody titers. The antibody protective level is ΔTiters \>0.01 IU/mL. The number of participants with evaluable anti-tetanus neutralizing antibody data were provided at each post-dose timepoint.
Duration of Anti-tetanus Neutralizing Antibody Titers Increasing From Baseline Over Protective Level Post-doseUp to 105 (±7) days post dosingThe increase of anti-tetanus neutralizing antibody titers were defined as ΔTiters, calculated as the post-administration antibody titers minus the baseline antibody titers. The antibody protective level is ΔTiters \>0.01 IU/mL. The number of participants with evaluable anti-tetanus neutralizing antibody data were provided at each post-dose timepoint.
Maximum Concentration (Cmax) of TNM002Up to 105 days post dosingThe peak serum concentration of TNM002 observed after administration.
Time to Maximum Concentration (Tmax) of TNM002Up to 105 days post dosingThe time point at which the Cmax is observed following TNM002 administration.
Change From Baseline in Anti-tetanus Neutralizing Antibody Titers (∆Titers)At 24 hours, 48 hours, and on Days 3, 7, 21, 30 and 90 post-doseThe increase of anti-tetanus neutralizing antibody titers were defined as ΔTiters, calculated as the post-administration antibody titers minus the baseline antibody titers. The antibody protective level is ΔTiters \>0.01 IU/mL. The number of participants with evaluable anti-tetanus neutralizing antibody data were provided at each post-dose timepoint.
Area Under the Concentration-time Curve From Time 0 to t (AUC0-t) of TNM002Up to 105 days post dosingThe total drug exposure of TNM002 over a defined time period (from administration to the last measurable concentration), calculated as the integral of the serum concentration-time curve.
Area Under the Concentration-time Curve From Time 0 to ∞ (AUC0-∞) of TNM002Up to 105 days post dosingThe total systemic exposure of TNM002 from administration until complete elimination, calculated by combining AUC0-t and the extrapolated area from the last measurable concentration to infinity.
Positive Rate of ADA in Volunteers in TNM002 GroupsUp to 105 days post dosingThe proportion of participants who developed anti-drug antibodies (ADA) against TNM002 during the course of the trial.
Elimination Half-life (t1/2) of TNM002Up to 105 days post dosingThe time required for the serum concentration of TNM002 to decrease by 50% during the elimination phase.

Countries

China

Participant flow

Recruitment details

A total of 240 adult participants were recruited from 4 study sites in China, from 18 April 2022 to 27 May 2022.

Pre-assignment details

There were 402 participants excluded from the trial before assignment to any arm, primarily due to failure to meet eligibility criteria (369 participants) and other (33).

Participants by arm

ArmCount
TNM002 5 mg
Double blind, a single intramuscular injection on Day 1
61
TNM002 10 mg
Double blind, a single intramuscular injection on Day 1
61
TNM002 15 mg
Double blind, a single intramuscular injection on Day 1
29
HTIG
Double blind, a single intramuscular injection of Human Tetanus Immunoglobulin (HTIG) 250 IU on Day 1
59
Placebo
Double blind, a single intramuscular injection on Day 1
30
Total240

Withdrawals & dropouts

PeriodReasonFG000FG001FG002FG003FG004
Overall StudyCovid quarantine10000
Overall StudyLost to Follow-up22110

Baseline characteristics

CharacteristicTNM002 5 mgTNM002 10 mgTNM002 15 mgHTIGPlaceboTotal
Age, Continuous40 years of age38 years of age33 years of age36 years of age38.5 years of age38 years of age
Anti-tetanus neutralizing antibody titers0.4982 IU/mL
STANDARD_DEVIATION 2.1697
0.0916 IU/mL
STANDARD_DEVIATION 0.3253
0.0362 IU/mL
STANDARD_DEVIATION 0.0583
0.0596 IU/mL
STANDARD_DEVIATION 0.253
0.0738 IU/mL
STANDARD_DEVIATION 0.2194
0.1782 IU/mL
STANDARD_DEVIATION 1.125
Race and Ethnicity Not Collected0 Participants
Sex: Female, Male
Female
20 Participants21 Participants8 Participants26 Participants13 Participants88 Participants
Sex: Female, Male
Male
41 Participants40 Participants21 Participants33 Participants17 Participants152 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
EG003
affected / at risk
EG004
affected / at risk
deaths
Total, all-cause mortality
0 / 610 / 610 / 290 / 590 / 30
other
Total, other adverse events
30 / 6129 / 6114 / 2932 / 5916 / 30
serious
Total, serious adverse events
0 / 610 / 610 / 291 / 590 / 30

Outcome results

Primary

Proportion of Volunteers With an Increase of Anti-tetanus Neutralizing Antibody Titers Over Protective Level

The increase of anti-tetanus neutralizing antibody titers were defined as ΔTiters, calculated as the post-administration antibody titers minus the baseline antibody titers. The antibody protective level is ΔTiters \>0.01 IU/mL.

Time frame: At 24 hours post-dose

Population: The analysis plan prespecified that placebo group data would not be collected for this outcome measure related to the anti-tetanus antibody level, as the administration of placebo precludes the generation of measurable antibody responses. Therefore, placebo recipients were analytically excluded from the efficacy analysis of antibody titer changes. The active control (HTIG) serves as the comparator for efficacy assessments, while the placebo group is retained solely for safety evaluations.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
TNM002 5 mgProportion of Volunteers With an Increase of Anti-tetanus Neutralizing Antibody Titers Over Protective Level56 Participants
TNM002 10 mgProportion of Volunteers With an Increase of Anti-tetanus Neutralizing Antibody Titers Over Protective Level61 Participants
TNM002 15 mgProportion of Volunteers With an Increase of Anti-tetanus Neutralizing Antibody Titers Over Protective Level29 Participants
HTIGProportion of Volunteers With an Increase of Anti-tetanus Neutralizing Antibody Titers Over Protective Level48 Participants
PlaceboProportion of Volunteers With an Increase of Anti-tetanus Neutralizing Antibody Titers Over Protective Level0 Participants
Secondary

Area Under the Concentration-time Curve From Time 0 to ∞ (AUC0-∞) of TNM002

The total systemic exposure of TNM002 from administration until complete elimination, calculated by combining AUC0-t and the extrapolated area from the last measurable concentration to infinity.

Time frame: Up to 105 days post dosing

Population: Five participants were exlucded from the analysis due to model fitting failure for AUC0-∞.

ArmMeasureValue (MEAN)Dispersion
TNM002 5 mgArea Under the Concentration-time Curve From Time 0 to ∞ (AUC0-∞) of TNM002589000 h*ng/mLStandard Deviation 244000
TNM002 10 mgArea Under the Concentration-time Curve From Time 0 to ∞ (AUC0-∞) of TNM0021180000 h*ng/mLStandard Deviation 416000
TNM002 15 mgArea Under the Concentration-time Curve From Time 0 to ∞ (AUC0-∞) of TNM0021990000 h*ng/mLStandard Deviation 559000
Secondary

Area Under the Concentration-time Curve From Time 0 to t (AUC0-t) of TNM002

The total drug exposure of TNM002 over a defined time period (from administration to the last measurable concentration), calculated as the integral of the serum concentration-time curve.

Time frame: Up to 105 days post dosing

Population: All TNM002-treated participants had evaluable post-dose concentration data for AUC analysis.

ArmMeasureValue (MEAN)Dispersion
TNM002 5 mgArea Under the Concentration-time Curve From Time 0 to t (AUC0-t) of TNM002524000 h*ng/mLStandard Deviation 231000
TNM002 10 mgArea Under the Concentration-time Curve From Time 0 to t (AUC0-t) of TNM0021080000 h*ng/mLStandard Deviation 384000
TNM002 15 mgArea Under the Concentration-time Curve From Time 0 to t (AUC0-t) of TNM0021810000 h*ng/mLStandard Deviation 499000
Secondary

Change From Baseline in Anti-tetanus Neutralizing Antibody Titers (∆Titers)

The increase of anti-tetanus neutralizing antibody titers were defined as ΔTiters, calculated as the post-administration antibody titers minus the baseline antibody titers. The antibody protective level is ΔTiters \>0.01 IU/mL. The number of participants with evaluable anti-tetanus neutralizing antibody data were provided at each post-dose timepoint.

Time frame: At 24 hours, 48 hours, and on Days 3, 7, 21, 30 and 90 post-dose

Population: The analysis plan prespecified that placebo group data would not be collected for this outcome measure related to the anti-tetanus antibody level, as the administration of placebo precludes the generation of measurable antibody responses. Therefore, placebo recipients were analytically excluded from the efficacy analysis of antibody titer changes. The active control (HTIG) serves as the comparator for efficacy assessments, while the placebo group is retained solely for safety evaluations.

ArmMeasureGroupValue (GEOMETRIC_MEAN)
TNM002 5 mgChange From Baseline in Anti-tetanus Neutralizing Antibody Titers (∆Titers)24 hours0.0450 IU/mL
TNM002 5 mgChange From Baseline in Anti-tetanus Neutralizing Antibody Titers (∆Titers)Day 300.1058 IU/mL
TNM002 5 mgChange From Baseline in Anti-tetanus Neutralizing Antibody Titers (∆Titers)Day 210.1282 IU/mL
TNM002 5 mgChange From Baseline in Anti-tetanus Neutralizing Antibody Titers (∆Titers)48 hours0.0687 IU/mL
TNM002 5 mgChange From Baseline in Anti-tetanus Neutralizing Antibody Titers (∆Titers)Day 900.0189 IU/mL
TNM002 5 mgChange From Baseline in Anti-tetanus Neutralizing Antibody Titers (∆Titers)Day 30.0957 IU/mL
TNM002 5 mgChange From Baseline in Anti-tetanus Neutralizing Antibody Titers (∆Titers)Day 70.1264 IU/mL
TNM002 10 mgChange From Baseline in Anti-tetanus Neutralizing Antibody Titers (∆Titers)Day 300.2119 IU/mL
TNM002 10 mgChange From Baseline in Anti-tetanus Neutralizing Antibody Titers (∆Titers)Day 70.2655 IU/mL
TNM002 10 mgChange From Baseline in Anti-tetanus Neutralizing Antibody Titers (∆Titers)Day 30.2057 IU/mL
TNM002 10 mgChange From Baseline in Anti-tetanus Neutralizing Antibody Titers (∆Titers)Day 210.2563 IU/mL
TNM002 10 mgChange From Baseline in Anti-tetanus Neutralizing Antibody Titers (∆Titers)Day 900.0381 IU/mL
TNM002 10 mgChange From Baseline in Anti-tetanus Neutralizing Antibody Titers (∆Titers)48 hours0.1665 IU/mL
TNM002 10 mgChange From Baseline in Anti-tetanus Neutralizing Antibody Titers (∆Titers)24 hours0.1095 IU/mL
TNM002 15 mgChange From Baseline in Anti-tetanus Neutralizing Antibody Titers (∆Titers)Day 70.4786 IU/mL
TNM002 15 mgChange From Baseline in Anti-tetanus Neutralizing Antibody Titers (∆Titers)24 hours0.2094 IU/mL
TNM002 15 mgChange From Baseline in Anti-tetanus Neutralizing Antibody Titers (∆Titers)48 hours0.3007 IU/mL
TNM002 15 mgChange From Baseline in Anti-tetanus Neutralizing Antibody Titers (∆Titers)Day 30.3835 IU/mL
TNM002 15 mgChange From Baseline in Anti-tetanus Neutralizing Antibody Titers (∆Titers)Day 210.3898 IU/mL
TNM002 15 mgChange From Baseline in Anti-tetanus Neutralizing Antibody Titers (∆Titers)Day 300.3217 IU/mL
TNM002 15 mgChange From Baseline in Anti-tetanus Neutralizing Antibody Titers (∆Titers)Day 900.0655 IU/mL
HTIGChange From Baseline in Anti-tetanus Neutralizing Antibody Titers (∆Titers)Day 30.0348 IU/mL
HTIGChange From Baseline in Anti-tetanus Neutralizing Antibody Titers (∆Titers)Day 900.0057 IU/mL
HTIGChange From Baseline in Anti-tetanus Neutralizing Antibody Titers (∆Titers)Day 300.0214 IU/mL
HTIGChange From Baseline in Anti-tetanus Neutralizing Antibody Titers (∆Titers)48 hours0.0295 IU/mL
HTIGChange From Baseline in Anti-tetanus Neutralizing Antibody Titers (∆Titers)24 hours0.0200 IU/mL
HTIGChange From Baseline in Anti-tetanus Neutralizing Antibody Titers (∆Titers)Day 210.0274 IU/mL
HTIGChange From Baseline in Anti-tetanus Neutralizing Antibody Titers (∆Titers)Day 70.0392 IU/mL
Secondary

Duration of Anti-tetanus Neutralizing Antibody Titers Increasing From Baseline Over Protective Level Post-dose

The increase of anti-tetanus neutralizing antibody titers were defined as ΔTiters, calculated as the post-administration antibody titers minus the baseline antibody titers. The antibody protective level is ΔTiters \>0.01 IU/mL. The number of participants with evaluable anti-tetanus neutralizing antibody data were provided at each post-dose timepoint.

Time frame: Up to 105 (±7) days post dosing

Population: The analysis plan prespecified that placebo group data would not be collected for this outcome measure related to the anti-tetanus antibody level, as the administration of placebo precludes the generation of measurable antibody responses. Therefore, placebo recipients were analytically excluded from the efficacy analysis of antibody titer changes. The active control (HTIG) serves as the comparator for efficacy assessments, while the placebo group is retained solely for safety evaluations.

ArmMeasureValue (MEDIAN)
TNM002 5 mgDuration of Anti-tetanus Neutralizing Antibody Titers Increasing From Baseline Over Protective Level Post-doseNA Day
TNM002 10 mgDuration of Anti-tetanus Neutralizing Antibody Titers Increasing From Baseline Over Protective Level Post-doseNA Day
TNM002 15 mgDuration of Anti-tetanus Neutralizing Antibody Titers Increasing From Baseline Over Protective Level Post-doseNA Day
HTIGDuration of Anti-tetanus Neutralizing Antibody Titers Increasing From Baseline Over Protective Level Post-dose59 Day
Secondary

Elimination Half-life (t1/2) of TNM002

The time required for the serum concentration of TNM002 to decrease by 50% during the elimination phase.

Time frame: Up to 105 days post dosing

Population: Five participants were exlucded from the analysis due to model fitting failure for t1/2.

ArmMeasureValue (MEDIAN)
TNM002 5 mgElimination Half-life (t1/2) of TNM002586 hours
TNM002 10 mgElimination Half-life (t1/2) of TNM002596 hours
TNM002 15 mgElimination Half-life (t1/2) of TNM002661 hours
Secondary

Maximum Concentration (Cmax) of TNM002

The peak serum concentration of TNM002 observed after administration.

Time frame: Up to 105 days post dosing

Population: All TNM002-treated participants had evaluable post-dose concentration data for the calculation of Cmax.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
TNM002 5 mgMaximum Concentration (Cmax) of TNM002460 ng/mLGeometric Coefficient of Variation 57.6
TNM002 10 mgMaximum Concentration (Cmax) of TNM002967 ng/mLGeometric Coefficient of Variation 52.6
TNM002 15 mgMaximum Concentration (Cmax) of TNM0021710 ng/mLGeometric Coefficient of Variation 34.5
Secondary

Positive Rate of ADA in Volunteers in TNM002 Groups

The proportion of participants who developed anti-drug antibodies (ADA) against TNM002 during the course of the trial.

Time frame: Up to 105 days post dosing

Population: All TNM002-treated participants had evaluable post-dose immunogenicity data for the ADA analysis.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
TNM002 5 mgPositive Rate of ADA in Volunteers in TNM002 Groups3 Participants
TNM002 10 mgPositive Rate of ADA in Volunteers in TNM002 Groups3 Participants
TNM002 15 mgPositive Rate of ADA in Volunteers in TNM002 Groups1 Participants
Secondary

Proportion of Volunteers With an Increase of Anti-tetanus Neutralizing Antibody Titers Over Protective Level

The increase of anti-tetanus neutralizing antibody titers were defined as ΔTiters, calculated as the post-administration antibody titers minus the baseline antibody titers. The antibody protective level is ΔTiters \>0.01 IU/mL. The number of participants with evaluable anti-tetanus neutralizing antibody data were provided at each post-dose timepoint.

Time frame: At 48 hours and on Days 3, 7, 21, 30, and 90 post-dose

Population: The analysis plan prespecified that placebo group data would not be collected for this outcome measure related to the anti-tetanus antibody level, as the administration of placebo precludes the generation of measurable antibody responses. Therefore, placebo recipients were analytically excluded from the efficacy analysis of antibody titer changes. The active control (HTIG) serves as the comparator for efficacy assessments, while the placebo group is retained solely for safety evaluations.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
TNM002 5 mgProportion of Volunteers With an Increase of Anti-tetanus Neutralizing Antibody Titers Over Protective Level48 hours58 Participants
TNM002 5 mgProportion of Volunteers With an Increase of Anti-tetanus Neutralizing Antibody Titers Over Protective LevelDay 361 Participants
TNM002 5 mgProportion of Volunteers With an Increase of Anti-tetanus Neutralizing Antibody Titers Over Protective LevelDay 761 Participants
TNM002 5 mgProportion of Volunteers With an Increase of Anti-tetanus Neutralizing Antibody Titers Over Protective LevelDay 2160 Participants
TNM002 5 mgProportion of Volunteers With an Increase of Anti-tetanus Neutralizing Antibody Titers Over Protective LevelDay 3059 Participants
TNM002 5 mgProportion of Volunteers With an Increase of Anti-tetanus Neutralizing Antibody Titers Over Protective LevelDay 9048 Participants
TNM002 10 mgProportion of Volunteers With an Increase of Anti-tetanus Neutralizing Antibody Titers Over Protective LevelDay 9058 Participants
TNM002 10 mgProportion of Volunteers With an Increase of Anti-tetanus Neutralizing Antibody Titers Over Protective LevelDay 2161 Participants
TNM002 10 mgProportion of Volunteers With an Increase of Anti-tetanus Neutralizing Antibody Titers Over Protective Level48 hours61 Participants
TNM002 10 mgProportion of Volunteers With an Increase of Anti-tetanus Neutralizing Antibody Titers Over Protective LevelDay 761 Participants
TNM002 10 mgProportion of Volunteers With an Increase of Anti-tetanus Neutralizing Antibody Titers Over Protective LevelDay 361 Participants
TNM002 10 mgProportion of Volunteers With an Increase of Anti-tetanus Neutralizing Antibody Titers Over Protective LevelDay 3061 Participants
TNM002 15 mgProportion of Volunteers With an Increase of Anti-tetanus Neutralizing Antibody Titers Over Protective LevelDay 329 Participants
TNM002 15 mgProportion of Volunteers With an Increase of Anti-tetanus Neutralizing Antibody Titers Over Protective LevelDay 729 Participants
TNM002 15 mgProportion of Volunteers With an Increase of Anti-tetanus Neutralizing Antibody Titers Over Protective LevelDay 2129 Participants
TNM002 15 mgProportion of Volunteers With an Increase of Anti-tetanus Neutralizing Antibody Titers Over Protective LevelDay 9028 Participants
TNM002 15 mgProportion of Volunteers With an Increase of Anti-tetanus Neutralizing Antibody Titers Over Protective LevelDay 3029 Participants
TNM002 15 mgProportion of Volunteers With an Increase of Anti-tetanus Neutralizing Antibody Titers Over Protective Level48 hours29 Participants
HTIGProportion of Volunteers With an Increase of Anti-tetanus Neutralizing Antibody Titers Over Protective LevelDay 3056 Participants
HTIGProportion of Volunteers With an Increase of Anti-tetanus Neutralizing Antibody Titers Over Protective LevelDay 9018 Participants
HTIGProportion of Volunteers With an Increase of Anti-tetanus Neutralizing Antibody Titers Over Protective LevelDay 357 Participants
HTIGProportion of Volunteers With an Increase of Anti-tetanus Neutralizing Antibody Titers Over Protective LevelDay 2157 Participants
HTIGProportion of Volunteers With an Increase of Anti-tetanus Neutralizing Antibody Titers Over Protective Level48 hours55 Participants
HTIGProportion of Volunteers With an Increase of Anti-tetanus Neutralizing Antibody Titers Over Protective LevelDay 759 Participants
Secondary

Time to Maximum Concentration (Tmax) of TNM002

The time point at which the Cmax is observed following TNM002 administration.

Time frame: Up to 105 days post dosing

Population: All TNM002-treated participants had evaluable post-dose concentration data for the calculation of Tmax.

ArmMeasureValue (MEDIAN)
TNM002 5 mgTime to Maximum Concentration (Tmax) of TNM002312 hours
TNM002 10 mgTime to Maximum Concentration (Tmax) of TNM002311 hours
TNM002 15 mgTime to Maximum Concentration (Tmax) of TNM002144 hours

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