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CompletedNCT02956746RabiesMabUpdated Feb 27, 2019Results posted

A Comparison of the Safety, PD and PK of a Single Dose of SYN023 Administered With Licensed Rabies Vaccines

A Phase 1/2 interventional study of SYN023 and Imovax in Human Rabies, sponsored by Synermore Biologics Co., Ltd.. Completed at 1 site in United States. Open to participants aged 18 Years to 50 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2019-02-27.

Sponsored by Synermore Biologics Co., Ltd. · Phase 1/2, Interventional, and Prevention

From the registry’s dates

  • Registered 3 months after the study started (first participant enrolled Aug 2016, registered Nov 2016).
Phase
Phase 1/2
Study type
Interventional
Enrollment
164
Allocation
Randomized
Ages
18 Years to 50 Years
Sex
All
01

Study summary

This is single site, randomized, blinded comparison of the immunogenicity, of Imovax (RVi) and Rabavert (RVa) rabies vaccines when subjects are administered rabies immune globulin (RIG) or SYN023. Subjects will be randomized into one of four dose groups: RVi + SYN023, RVi+RIG, RVa+SYN023 and RVa+RIG. The initial dose of RVi and RVa will be co-administered with either RIG or SYN023). Rabies virus neutralizing activity (RVNA) and blood levels of SYN023 will be measured for the remainder of the trial while the rest of the five RVi and RVa doses are given. The study will last 112 days. SYN023 concentrations and anti-SYN023 antibodies will also be measured.

Read the detailed description

Administered immunoglobulins directed against vaccine antigens have the potential to inhibit the immune response to a vaccine. Both vaccination and immune globulin are used together in the post exposure prophylaxis of rabies virus infection. SYN023 (a mixture of two monoclonal antibodies CTB011 and CTB012) may be used instead of human rabies immune globulin. Since there is a risk of antagonism of vaccine induced immunity by SYN023, as there is with rabies immune globulin, it is necessary to study possible interactions of these two agents that might be used concurrently. This is single site, randomized, blinded comparison of the immunogenicity, of Imovax (RVi) and Rabavert (RVa) rabies vaccines when administered concurrently with rabies immune globulin (RIG) or SYN023. Subjects will be randomized into one of four dose groups: RVi + SYN023, RVi + RIG, RVa+SYN023 and RVa + RIG. The initial dose of RVi and RVa will be co-administered with either RIG or SYN023). The remaining 4 doses of RVi and RVa will be administered intramuscularly as specified in the product labeling. Serum rabies virus neutralizing activity (RVNA) and serum concentrations of the components of of SYN023 will be measured for the remainder of the trial while the rest of the five RVi and RVa doses are given. Adverse events will be collected for the duration of the trial. The study will last 112 days. Anti-SYN023 antibodies will also be measured.

02

Conditions studied

  • Human Rabies

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03

In context

Rabies

114 studies on the registry are indexed under Rabies; 15 are open to participants now.

This study's enrollment of 164 is below the median of 201 across 104 interventional studies indexed under Rabies.

Browse Rabies studies →

Lead sponsor

Synermore Biologics Co., Ltd. is the lead sponsor of 5 studies on the registry; none are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 50 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  1. Male or female subjects between 18 and 50 years of age, inclusive
  2. between 18 and 30 kg/m², inclusive
  3. Female subjects physically capable of pregnancy (i.e., not sterilized and still menstruating or within 1 year of the last menses if menopausal) must:

    1. Agree to avoid pregnancy from 28 days prior to Study Day 0 through the duration of the study.
    2. If in a sexual relationship with a man, use an acceptable method of avoiding pregnancy during this period. Acceptable methods of avoiding pregnancy include: the use of at least two forms of , including use by a partner of a barrier method (e.g., male condom with intravaginal spermicide) as one form of contraception.
  4. Women of must have a negative serum pregnancy test within 24 hours preceding receipt of each dose.
  5. Can understand and sign the document, can communicate with the investigator and provide updated contact information as needed for the duration of the study, has no current plans to move from the study area for the duration of the study, and can understand and comply with the requirements of the protocol.

Exclusion criteria

Exclusion Criteria:

  1. Oral temperature ≥37.5°C at screening
  2. Complete blood count (CBC) and count abnormal values (>5% above the [ULN] or >5% below the lower limit of normal [LLN] per local laboratory parameters) at screening with exception of absolute lymphocyte count.
  3. Abnormally elevated (AST), alanine aminotransferase (ALT), total , alkaline phosphatase (ALP), or creatinine (Cr) values at screening (however a single test AST, ALT or ALP may be >10% above the ULN per local laboratory parameters)
  4. Abnormal PT () PTT
  5. Abnormal screening urinalysis result that is, per the investigator, , or a screening urine dipstick result of ≥2+ protein
  6. Positive screening urine test for illicit drugs (opiates, cocaine, amphetamines methamphetamines, barbiturates, benzodiazepines, tetrahydrocannabinol, PCP, MDMA, and methadone)
  7. History or evidence of disease
  8. History or evidence of any past, present, or future possible immunodeficiency state, including laboratory evidence of (HIV) 1 or 2 infection
  9. History or evidence of chronic hepatitis
  10. History or evidence of rabies infection
  11. History or evidence of any other acute or chronic disease that, in the opinion of the investigator, may interfere with the evaluation of the safety or immunogenicity of the drug or compromise the safety of the subject; for example a clinically relevant history of respiratory, thyroid, gastrointestinal, renal, hepatic, hematological, lymphatic, oncologic, cardiovascular, psychiatric, neurological, musculoskeletal, genitourinary, infective, inflammatory, immunological, dermatological or connective tissue disease
  12. History or evidence of allergic disease or reaction, including adverse responses to therapeutic monoclonal antibodies that, in the opinion of the investigator, may compromise the safety of the subject
  13. History of non-compliance that, in the opinion of the investigator, will make it unlikely that the subject will comply with the protocol
  14. Previous exposure to rabies vaccine
  15. Receipt of an immunoglobulin or blood product within 90 days prior to Study Day 0
  16. Receipt of medications other than inhaled or topical immunosuppressant drugs within 45 days prior to Study Day 0
  17. Body weight greater than 90 kg.
  18. History or evidence of IgA deficiency
Terms in these criteria, in plain language(13)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

BMI (body mass index)

Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.

What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

Childbearing potential

Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).

Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

Platelets

Blood cells that help blood clot. Too few raises the risk of bleeding and bruising. A usual adult range is about 150–400 × 10⁹/L (150,000–400,000 per µL); each lab has its own reference range.

ULN (upper limit of normal)

The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.

“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.

ALT and AST (liver enzymes)

Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.

Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.

Bilirubin

A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.

Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.

INR, PT and aPTT (clotting tests)

Blood tests of how long blood takes to clot. The INR is the prothrombin time (PT) put on a common scale; about 1 is usual for someone not taking a blood thinner.

Criteria often make an exception for people on a blood thinner such as warfarin, whose INR is raised on purpose.

Clinically significant

Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.

Autoimmune disease

A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.

Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

Immunosuppression

A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.

Read whether the line is about a condition or about medicines, and which medicines and doses it means.

05

Study design

Phase
Phase 1 / Phase 2
Primary purpose
Prevention
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single (Participant)
Enrollment
164 participants (actual)

Study arms

  • Experimental
    Imovax, SYN023

    Subjects will receive SYN023 and 5 doses of Imovax rabies vaccine

    Biological: SYN023 · Biological: Imovax

  • Active comparator
    Imovax, human rabies immune globulin

    Subjects will receive HyperRAB ST (human rabies immune globulin) and 5 doses of Imovax rabies vaccine

    Biological: Imovax · Biological: HyperRAB ST (human rabies immune globulin)

  • Experimental
    RabAvert, SYN023

    Subjects will receive SYN023 and 5 doses of RabAvert rabies vaccine

    Biological: SYN023 · Biological: RabAvert

  • Active comparator
    RabAvert, human rabies immune globulin

    Subjects will receive HyperRAB ST (human rabies immune globulin) and 5 doses of RabAvert rabies vaccine

    Biological: RabAvert · Biological: HyperRAB ST (human rabies immune globulin)

Interventions

  • BiologicalSYN023

    The effects of SYN023 on immunogenicity of rabies vaccines Imovax and RabAvert will be compared to the effect of human rabies immune globulin.

  • BiologicalImovax

    Subjects will receive SYN023 or HyperRAB ST (human rabies immune globulin) and 5 doses of Imovax rabies vaccine

  • BiologicalRabAvert

    Subjects will receive SYN023 or HyperRAB ST (human rabies immune globulin) and 5 doses of RabAvert rabies vaccine

  • BiologicalHyperRAB ST (human rabies immune globulin)

    The effects of SYN023 on immunogenicity of rabies vaccines Imovax and RabAvert will be compared to the effect of human rabies immune globulin.

06

What researchers measure

Primary outcomes

  1. Percentage of Participants With Serum Rabies Virus Neutralizing Activity

    Inhibitory activity of serum in standard rabies virus inhibition test (RFFIT: Rapid Fluorescent Foci Inhibition Test) assessed as serum RVNA ≥ 0.5 IU/mL. RFFIT is a serum neutralization (inhibition) test, which means it measures the ability of rabies specific antibodies to neutralize rabies virus and prevent the virus from infecting cells. These antibodies are called rabies virus neutralizing antibodies (RVNA).

    Time frame: 112 days

Secondary outcomes

  1. Percentage of Participants With Adverse Event Incidence of SYN023 Compared to HRIG in RabAvert and Imovax Reciptients

    Electrocardiograms are performed to monitor subject safety. Laboratory evaluations for subject safety (adverse events) are serum chemistry evaluations, blood urea nitrogen, creatinine, bilirubin, alanine amino transferase, aspartate amino transferase, creatine phosphokinase, troponin, potassium, sodium, bicarbonate, calcium, complete blood count, platelet count, differential count, PT(prothrombin time, international normalized ratio) and PTT (partial prothrombin time and urinalyses for monitoring of safety. Additional laboratory tests may be required for evaluation of specific adverse events such as anaphylaxis and immune complex diseases. Adverse events and serious adverse events will be analyzed. A comparison of adverse event incidence between the four treatment groups will be performed.

    Time frame: 42 days

  2. Percentage of Participants With Immunogenicity: Anti-CTB012 Antibodies Positive

    Measurement of the development of anti-CTB012 antibodies (a component of anti-SYN023 antibodies) in participants which will be analyzed on a continuous scale as a categorical variable by treatment assignment, with descriptive statistics.

    Time frame: 112 days

  3. Percentage of Participants With Immunogenicity: Anti-CTB011 Antibodies Positive

    Measurement of the development of anti-CTB011 antibodies (a component of anti-SYN023 antibodies) in participants which will be analyzed on a continuous scale as a categorical variable by treatment assignment, with descriptive statistics.

    Time frame: 112 days

  4. SYN023 Monoclonal Antibody Areas Under the Curve (AUC0-last, AUC0-inf) for CTB011 and CTB012)

    The area under the time concentration curve for SYN023 mAb components CTB011 and CTB012 will be estimated at Day 0 ( pre-dose), Day 1, Day 3, Day 7, Day 14, Day 28, Day 35, Day 42, and Day 84 post-dose, using non compartmental analysis.

    Time frame: 84 days

  5. Time to Maximum Concentration Tmax of CTB011 and CTB012

    Interval from time 0 to maximum measured concentration of CTB011 and CTB012 (SYN023 components) at Day 0 ( pre-dose), Day 1, Day 3, Day 7, Day 14, Day 28, Day 35, Day 42, and Day 84 post-dose, using non compartmental analysis.

    Time frame: 84 days

  6. Maximum Serum Concentration Cmax

    Maximum concentration of of CTB011 and CTB012 at Day 0 ( pre-dose), Day 1, Day 3, Day 7, Day 14, Day 28, Day 35, Day 42, and Day 84 post-dose, using non compartmental analysis.

    Time frame: 84 days

  7. Serum Clearance Rate (Clp) of CTB011 and CTB012

    Calculated serum clearance rates for CTB011 and CTB012 at Day 0 ( pre-dose), Day 1, Day 3, Day 7, Day 14, Day 28, Day 35, Day 42, and Day 84 post-dose, using non compartmental analysis.

    Time frame: 84 days

  8. Serum Half Lives of CTB011 and CTB012

    The time in hours to reduce the serum concnetration of CTB011 and CTB012 to 50% of the maximum serum concentration at Day 0 ( pre-dose), Day 1, Day 3, Day 7, Day 14, Day 28, Day 35, Day 42, and Day 84 post-dose, using non compartmental analysis.

    Time frame: 84 days

07

Results

Posted Feb 27, 2019

Participant flow

Participant flow — Overall Study
MilestoneImovax, SYN023Imovax, Human Rabies Immune GlobulinRabAvert, SYN023RabAvert, Human Rabies Immune Globulin
Started40404242
Completed38373638
Not completed2364

Outcome measures

PrimaryPercentage of Participants With Serum Rabies Virus Neutralizing Activity

Inhibitory activity of serum in standard rabies virus inhibition test (RFFIT: Rapid Fluorescent Foci Inhibition Test) assessed as serum RVNA ≥ 0.5 IU/mL. RFFIT is a serum neutralization (inhibition) test, which means it measures the ability of rabies specific antibodies to neutralize rabies virus and prevent the virus from infecting cells. These antibodies are called rabies virus neutralizing antibodies (RVNA).

Time frame:
112 days
Reported as:
Number · percentage of participants
Percentage of Participants With Serum Rabies Virus Neutralizing Activity
percentage of participantsImovax, SYN023Imovax, Human Rabies Immune GlobulinRabAvert, SYN023RabAvert, Human Rabies Immune Globulin
Percentage of Participants With Serum Rabies Virus Neutralizing Activity94.397.197.1100
Statistical analysis
  • Imovax, SYN023 vs Imovax, Human Rabies Immune Globulin vs RabAvert, SYN023 vs RabAvert, Human Rabies Immune Globulin · ANOVA · p = 0.4187 (threshold for significance p-values \< 0.05)
SecondaryPercentage of Participants With Adverse Event Incidence of SYN023 Compared to HRIG in RabAvert and Imovax Reciptients

Electrocardiograms are performed to monitor subject safety. Laboratory evaluations for subject safety (adverse events) are serum chemistry evaluations, blood urea nitrogen, creatinine, bilirubin, alanine amino transferase, aspartate amino transferase, creatine phosphokinase, troponin, potassium, sodium, bicarbonate, calcium, complete blood count, platelet count, differential count, PT(prothrombin time, international normalized ratio) and PTT (partial prothrombin time and urinalyses for monitoring of safety. Additional laboratory tests may be required for evaluation of specific adverse events such as anaphylaxis and immune complex diseases. Adverse events and serious adverse events will be analyzed. A comparison of adverse event incidence between the four treatment groups will be performed.

Time frame:
42 days
Reported as:
Number · percentage of participants
Percentage of Participants With Adverse Event Incidence of SYN023 Compared to HRIG in RabAvert and Imovax Reciptients
percentage of participantsImovax, SYN023Imovax, Human Rabies Immune GlobulinRabAvert, SYN023RabAvert, Human Rabies Immune Globulin
Unsolicited AEs605073.859.5
Solicited AEs1547.528.640.5
SecondaryPercentage of Participants With Immunogenicity: Anti-CTB012 Antibodies Positive

Measurement of the development of anti-CTB012 antibodies (a component of anti-SYN023 antibodies) in participants which will be analyzed on a continuous scale as a categorical variable by treatment assignment, with descriptive statistics.

Time frame:
112 days
Reported as:
Number · percentage of participants
Percentage of Participants With Immunogenicity: Anti-CTB012 Antibodies Positive
percentage of participantsImovax, SYN023Imovax, Human Rabies Immune GlobulinRabAvert, SYN023RabAvert, Human Rabies Immune Globulin
Percentage of Participants With Immunogenicity: Anti-CTB012 Antibodies Positive5.3003.6
SecondaryPercentage of Participants With Immunogenicity: Anti-CTB011 Antibodies Positive

Measurement of the development of anti-CTB011 antibodies (a component of anti-SYN023 antibodies) in participants which will be analyzed on a continuous scale as a categorical variable by treatment assignment, with descriptive statistics.

Time frame:
112 days
Reported as:
Number · percentage of subjects
Percentage of Participants With Immunogenicity: Anti-CTB011 Antibodies Positive
percentage of subjectsImovax, SYN023Imovax, Human Rabies Immune GlobulinRabAvert, SYN023RabAvert, Human Rabies Immune Globulin
Percentage of Participants With Immunogenicity: Anti-CTB011 Antibodies Positive36.828.631.421.4
SecondarySYN023 Monoclonal Antibody Areas Under the Curve (AUC0-last, AUC0-inf) for CTB011 and CTB012)

The area under the time concentration curve for SYN023 mAb components CTB011 and CTB012 will be estimated at Day 0 ( pre-dose), Day 1, Day 3, Day 7, Day 14, Day 28, Day 35, Day 42, and Day 84 post-dose, using non compartmental analysis.

Time frame:
84 days
Reported as:
Mean · day*ng/mL
SYN023 Monoclonal Antibody Areas Under the Curve (AUC0-last, AUC0-inf) for CTB011 and CTB012)
day*ng/mLImovax, SYN023RabAvert, SYN023
AUC0-t for CTB-01117549.49 ± 8300.0517318.95 ± 7488.84
AUC0-inf for CTB-01120604.56 ± 8904.6020924.6 ± 7041.56
AUC0-t for CTB-01222896.71 ± 113653.6823617.93 ± 10768.7
AUC0-inf for CTB-01230943.29 ± 11230.3932495.98 ± 11892.98
SecondaryTime to Maximum Concentration Tmax of CTB011 and CTB012

Interval from time 0 to maximum measured concentration of CTB011 and CTB012 (SYN023 components) at Day 0 ( pre-dose), Day 1, Day 3, Day 7, Day 14, Day 28, Day 35, Day 42, and Day 84 post-dose, using non compartmental analysis.

Time frame:
84 days
Reported as:
Mean · day
Time to Maximum Concentration Tmax of CTB011 and CTB012
dayImovax, SYN023RabAvert, SYN023
Tmax for CTB-0116.655 ± 5.9576.686 ± 4.741
Tmax for CTB-0126.892 ± 6.3166.932 ± 4.417
SecondaryMaximum Serum Concentration Cmax

Maximum concentration of of CTB011 and CTB012 at Day 0 ( pre-dose), Day 1, Day 3, Day 7, Day 14, Day 28, Day 35, Day 42, and Day 84 post-dose, using non compartmental analysis.

Time frame:
84 days
Reported as:
Mean · ng/mL
Maximum Serum Concentration Cmax
ng/mLImovax, SYN023RabAvert, SYN023
Cmax for CTB-011686 ± 292610 ± 240
Cmax for CTB-012959 ± 449879 ± 400
SecondarySerum Clearance Rate (Clp) of CTB011 and CTB012

Calculated serum clearance rates for CTB011 and CTB012 at Day 0 ( pre-dose), Day 1, Day 3, Day 7, Day 14, Day 28, Day 35, Day 42, and Day 84 post-dose, using non compartmental analysis.

Time frame:
84 days
Reported as:
Mean · L/day
Serum Clearance Rate (Clp) of CTB011 and CTB012
L/dayImovax, SYN023RabAvert, SYN023
clearance rates for CTB0111.18 ± 0.621.14 ± 0.59
clearance rates for CTB0120.74 ± 0.290.77 ± 0.46
SecondarySerum Half Lives of CTB011 and CTB012

The time in hours to reduce the serum concnetration of CTB011 and CTB012 to 50% of the maximum serum concentration at Day 0 ( pre-dose), Day 1, Day 3, Day 7, Day 14, Day 28, Day 35, Day 42, and Day 84 post-dose, using non compartmental analysis.

Time frame:
84 days
Reported as:
Mean · day
Serum Half Lives of CTB011 and CTB012
dayImovax, SYN023RabAvert, SYN023
t1/2 for CTB-01119.19 ± 6.6422.12 ± 5.18
t1/2 for CTB-01220.76 ± 8.7322.86 ± 8.7

Adverse events

Collected over 112 days. Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Imovax, Human Rabies Immune Globulin0/40 (0%)0/40 (0%)20/40 (50%)
RabAvert, Human Rabies Immune Globulin0/42 (0%)0/42 (0%)25/42 (59.5%)
Imovax, SYN0230/40 (0%)0/40 (0%)24/40 (60%)
RabAvert, SYN0230/42 (0%)1/42 (2.4%)31/42 (73.8%)
Most frequent serious events
Most frequent serious events
EventImovax, Human Rabies Immune GlobulinRabAvert, Human Rabies Immune GlobulinImovax, SYN023RabAvert, SYN023
Troponin I increasedInvestigations0/400/420/401/42
Most frequent other events
Showing 10 of 70
Most frequent other events
EventImovax, Human Rabies Immune GlobulinRabAvert, Human Rabies Immune GlobulinImovax, SYN023RabAvert, SYN023
Injection site painGeneral disorders7/406/4211/4020/42
Viral upper respiratory tract infectionInfections and infestations1/402/423/406/42
Red blood cells urine positiveInvestigations1/405/421/401/42
Injection site haemorrhageGeneral disorders0/401/421/404/42
Injection site erythemaGeneral disorders3/400/421/402/42
Haemoglobin decreasedInvestigations1/400/423/402/42
Influenza like illnessGeneral disorders1/403/420/403/42
Vessel puncture site bruiseGeneral disorders2/402/421/402/42
Catheter site haemorrhageGeneral disorders0/400/422/400/42
Haematocrit decreasedInvestigations1/400/422/400/42

Baseline characteristics

Age, Categorical
Age, Categorical(Participants)Imovax, SYN023Imovax, Human Rabies Immune GlobulinRabAvert, SYN023RabAvert, Human Rabies Immune GlobulinTotal
<=18 years00000
Between 18 and 65 years40404242164
>=65 years00000
Sex: Female, Male
Sex: Female, Male(Participants)Imovax, SYN023Imovax, Human Rabies Immune GlobulinRabAvert, SYN023RabAvert, Human Rabies Immune GlobulinTotal
Female28272820103
Male1213142261
Ethnicity (NIH/OMB)
Ethnicity (NIH/OMB)(Participants)Imovax, SYN023Imovax, Human Rabies Immune GlobulinRabAvert, SYN023RabAvert, Human Rabies Immune GlobulinTotal
Hispanic or Latino37373940153
Not Hispanic or Latino333211
Unknown or Not Reported00000
Region of Enrollment
Region of Enrollment(participants)Imovax, SYN023Imovax, Human Rabies Immune GlobulinRabAvert, SYN023RabAvert, Human Rabies Immune GlobulinTotal
United States40404242164
BMI
BMI(kg/m^2)Imovax, SYN023Imovax, Human Rabies Immune GlobulinRabAvert, SYN023RabAvert, Human Rabies Immune GlobulinTotal
Mean24.41 ± 2.8725.74 ± 2.9624.92 ± 2.6624.39 ± 3.1424.86 ± 2.93
08

Study locations

1 site
  • inVentiv Clinical Research Facility, 1951 NW 7th Ave. Suit 450
    Miami, Florida 33136, United States
09

References and documents

Publications

  • McClain JB, Chuang A, Reid C, Moore SM, Tsao E. Rabies virus neutralizing activity, pharmacokinetics, and safety of the monoclonal antibody mixture SYN023 in combination with rabies vaccination: Results of a phase 2, randomized, blinded, controlled trial. Vaccine. 2021 Sep 24;39(40):5822-5830. doi: 10.1016/j.vaccine.2021.08.066. Epub 2021 Sep 3. PubMed 34483020 ↗

Study documents

PDFs hosted by the registry, ClinicalTrials.gov.

Individual participant data

Plan to share: No

10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Feb 27, 2019, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT02956746
Lead sponsor
Synermore Biologics Co., Ltd.
Collaborators
inVentiv Health Clinical
Responsible party
Sponsor
First posted
Nov 6, 2016
Start date
Aug 2016
Primary completion
Dec 2017
Completion
Jan 2018
Results posted
Feb 27, 2019
Last update
Feb 27, 2019

Study contacts

Wyatt J David, PhD
principal investigator · inVentiv Health Clinical Research Services LLC

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Feb 2019. You cannot join it, but the record below documents what was studied.

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Discussion

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Studies of the drugs tested here: SYN023 · Rabies virus strain PM-1503-3M antigen (propiolactone inactivated) · Rabies virus strain flury LEP antigen (propiolactone inactivated)

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