Immunogenicity and Safety of the Concomitant Administration of a Tdap Vaccine and Meningococcal ACWY Conjugate Vaccine in Healthy Subjects Aged 11-25 Years

Novartis Vaccines1,072 enrolled

Overview

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

PREVENTION

Masking

DOUBLE

Enrollment

1,072

Conditions

Meningococcal Disease Meningococcal Meningitis

Interventions

Meningococcal ACWY conjugate vaccine (MenACWY-CRM)BIOLOGICAL

Combined tetanus, reduced diphtheria and acellular pertussis vaccine (Tdap)BIOLOGICAL

saline placeboBIOLOGICAL

4.5 mg sodium chloride per 0.5 ml dose

Eligibility

Sex: ALLMin age: 11 YearsMax age: 25 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * Male and female 11-25 years old healthy subjects; * who had received the primary immunization with a vaccine containing DT or Tdap antigens and a T, Td, or Tdap booster injection at least 5 years prior to study entry Exclusion Criteria: * previous ascertained or suspected disease caused by N. meningitidis * previously been immunized with a meningococcal vaccine or vaccine containing meningococcal antigen(s) * serious acute, chronic or progressive disease * history of any anaphylaxis, serious vaccine reactions, or allergy to any vaccine component * known or suspected impairment/alteration of immune function, either congenital or acquired

Locations (14)

Unnamed facility

Andria, Italy

Unnamed facility

Catania, Italy

Unnamed facility

Chieti, Italy

Unnamed facility

Ferrara, Italy

Outcomes

Primary Outcomes

Percentage of Subjects With an Immune Response Against Diphtheria, Tetanus and Pertussis, When Tdap is Concomitantly Administered With MenACWY-CRM Compared to Tdap Given Concomitantly With Saline Placebo

To demonstrate that the immunogenicity of one injection of Tdap vaccine, concomitantly administered with MenACWY-CRM vaccine, is not inferior to that of one injection of Tdap vaccine, concomitantly administered with saline placebo, in terms of 1. the percentage of subjects with antibody levels against diphtheria toxin ≥ 1.0 IU/mL and against tetanus toxin ≥ 1.0 IU/mL and 2. the percentage of subjects with at least 4 fold increase in antibody levels against pertussis toxin (PT), filamentous hemagglutinin (FHA) and pertactin (PRN) at 1 month after immunization, as measured by enzyme linked immunosorbent assay (ELISA).

Time frame: 1 month after vaccination (Day 29)

Secondary Outcomes

Percentage of Subjects With Anti-diphtheria and Anti-tetanus Concentrations ≥ 0.1 IU/mL When Tdap is Administered Concomitantly With MenACWY-CRM Vaccine Compared to Tdap Given Concomitantly With Saline Placebo

The percentage of subjects with anti-diphtheria and anti-tetanus concentrations ≥ 0.1 IU/mL (as measured by ELISA) following concomitant administration of Tdap vaccine with MenACWY-CRM vaccine as compared to when Tdap was given concomitantly with saline placebo.

Time frame: 1 month after vaccination (Day 29)

Geometric Mean Concentrations (GMCs) of Antibodies Against Diphtheria,Tetanus and Pertussis Antigens After Concomitant Administration of Tdap With MenACWY-CRM Compared to Tdap Given Concomitantly With Saline Placebo

The geometric mean concentrations of antibodies ≥ 0.1 IU/mL against diphtheria, tetanus and pertussis (PT, FHA and PRN) antigens in subjects, as measured by ELISA, following concomitant administration of Tdap with MenACWY-CRM as compared to when Tdap given concomitantly with saline placebo.

Time frame: 1 month after vaccination (Day 29)

Geometric Mean Ratios of Antibody Concentrations Against Diphtheria,Tetanus and Pertussis Antigens When Tdap is Administered Concomitantly With MenACWY-CRM Vaccine Compared to Tdap Given Concomitantly With Saline Placebo

Data from ClinicalTrials.gov

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Unnamed facility

Genova, Italy

Unnamed facility

Lanciano, Italy

Unnamed facility

Massafra, Italy

Unnamed facility

Modena, Italy

Unnamed facility

Novara, Italy

Unnamed facility

Palermo, Italy

...and 4 more locations

The geometric mean ratios (GMRs- day 29/day 1) of post-vaccination versus pre- vaccination antibody concentrations against diptheria, tetanus and pertussis (PT, FHA and PRN) antigens following concomitant administration of Tdap vaccine with MenACWY-CRM vaccine as compared to when Tdap was given concomitantly with saline placebo.

Time frame: 1 month after vaccination (Day 29)

Percentage of Subjects With Serum Bactericidal Antibody Titers ≥1:4 and ≥1:8, When MenACWY-CRM is Concomitantly Administered With Tdap Vaccine Compared to MenACWY-CRM Given Concomitantly With Saline Placebo

The percentage of subjects with serum bactericidal antibody titers(hSBA) ≥ 1:4 and ≥ 1:8 against Neisseria meningitidis serogroups A,C,W and Y,following concomitant administration of MenACWY-CRM vaccine with Tdap vaccine as compared to when MenACWY-CRM was given concomitantly with saline placebo. The serum bactericidal antibodies directed against N.meningitidis serogroup A, C, W and Y, are measured by human complement Serum Bactericidal Assay (hSBA).

Time frame: 1 month after vaccination (Day 29)

The hSBA Geometric Mean Titers Against N.Meningitidis Serogroups A,C,W and Y, When MenACWY-CRM is Concomitantly Administered With Tdap Vaccine Compared to MenACWY-CRM Given Concomitantly With Saline Placebo

The hSBA geometric mean titers (GMTs) against N.meningitidis serogroups A,C,W and Y, at baseline and at one month, following concomitant administration of MenACWY-CRM vaccine with Tdap vaccine, as compared to when MenACWY-CRM was given concomitantly with saline placebo.

Time frame: 1 month after vaccination (Day 29)

Geometric Mean Ratios of hSBA Titers Against N.Meningitidis Serogroups A,C,W and Y, When MenACWY-CRM is Concomitantly Administered With Tdap Compared to MenACWY-CRM Given Concomitantly With Saline Placebo

The geometric mean ratios (GMRs-day 29/day1)of post-vaccination versus pre- vaccination hSBA titers against N.meningitidis serogroups A,C,W and Y, when MenACWY-CRM vaccine is concomitantly administered with Tdap vaccine as compared to when MenACWY-CRM was given concomitantly with saline placebo.

Time frame: 1 month after vaccination (Day 29)

Percentage of Subjects With hSBA Seroresponse, When MenACWY-CRM is Concomitantly Administered With Tdap Compared to MenACWY-CRM Given Concomitantly With Saline Placebo

The percentage of subjects showing an hSBA seroresponse against N.meningitidis serogroups A,C,W and Y, following concomitant administration of MenACWY-CRM vaccine with Tdap vaccine as compared to when MenACWY-CRM was given concomitantly with saline placebo. Seroresponse to MenACWY-CRM is defined as a pre-vaccination hSBA titer \< 1:4 to a post-vaccination hSBA titer of ≥ 1:8 or a pre-vaccination hSBA titer ≥ 1:4 to a post-vaccination titer of at least four times the baseline hSBA titer.

Time frame: 1 month after vaccination (Day 29)

Number of Subjects With Solicited Local and Systemic Adverse Events When Tdap is Concomitantly Administered With MenACWY-CRM Compared to When MenACWY-CRM is Concomitantly Administered With Saline Placebo

The number of subjects reporting solicited local and systemic reactions following concomitant administration of MenACWY-CRM vaccine and Tdap vaccine as compared to when MenACWY-CRM vaccine was concomitantly administered with saline placebo.

Time frame: Day 1-7 after any vaccination

Number of Subjects With Solicited Local and Systemic Adverse Events When Tdap is Concomitantly Administered With MenACWY-CRM Compared to When Tdap is Concomitantly Administered With Saline Placebo

The number of subjects reporting solicited local and systemic reactions following concomitant administration of MenACWY-CRM vaccine and Tdap vaccine as compared to when Tdap was concomitantly administered with saline placebo

Time frame: Day 1-7 after any vaccination

Number of Subjects With Unsolicited Adverse Events When Tdap is Concomitantly Administered With MenACWY-CRM Compared to MenACWY-CRM or Tdap Concomitantly Administered With Saline Placebo

The number of subjects reporting any unsolicited adverse events (AEs) when Tdap is concomitantly administered with MenACWY-CRM as compared to when MenACWY-CRM vaccine or Tdap vaccine was concomitantly administered with saline placebo.

Time frame: Throughout the study (Day 1 to Day 181)