Immunogenicity and Safety of an Investigational Quadrivalent Meningococcal Conjugate Vaccine in Toddlers

Phase 3

Completed

• Conditions: Meningococcal Infections; Meningitis; Meningococcal Meningitis
• Interventions: Biological: Meningococcal polysaccharide groups A, C, W-135 and Y Conjugate vaccine; Biological: Meningococcal Polysaccharide (Serogroups A, C, Y, and W) Tetanus Toxoid Conjugate Vaccine

• Registration Number: NCT02955797
• Lead Sponsor: Sanofi Pasteur, a Sanofi Company

Brief Summary

The purpose of the study was to evaluate the immunogenicity and describe the safety of a single dose of Meningococcal Polysaccharide (Serogroups A, C, Y and W) Tetanus Toxoid (MenACYW) Conjugate vaccine compared to the licensed Meningococcal polysaccharide groups A, C, W-135 and Y (Nimenrix®) Conjugate vaccine in toddlers 12 to 23 months of age in the European Union (EU). The toddlers were either meningococcal vaccine naïve or had received monovalent meningococcal C (MenC) vaccination during infancy to evaluate any potential impact of the meningococcal vaccine background on the immunogenicity and safety profile of the investigational product.

Primary Objectives:

* To demonstrate the non-inferiority of the antibody response to meningococcal serogroups A, C, Y, and W after a single dose of MenACYW Conjugate vaccine or Nimenrix® in toddlers who either were meningococcal vaccine naïve or had received monovalent MenC vaccination during infancy.

* To demonstrate the non-inferiority of the antibody response to meningococcal serogroups A, C, Y, and W after a single dose of MenACYW Conjugate vaccine or Nimenrix® in meningococcal vaccine naïve toddlers.

Secondary Objectives:

* To compare the antibody responses (geometric mean titers \[GMTs\]) to meningococcal serogroups A, C, Y, and W after a dose of MenACYW Conjugate vaccine or Nimenrix® as measured by serum bactericidal assay using human complement (hSBA) in toddlers who either were meningococcal vaccine naïve or had received monovalent MenC vaccination during infancy.

* To compare the antibody responses (GMTs) to meningococcal serogroups A, C, Y, and W after a dose of MenACYW Conjugate vaccine or Nimenrix® as measured by hSBA in meningococcal vaccine naïve toddlers.

* To compare the antibody responses (GMTs) to meningococcal serogroups A, C, Y, and W after a dose of MenACYW Conjugate vaccine or Nimenrix® as measured by hSBA in toddlers who received monovalent MenC vaccination during infancy.

Detailed Description

Healthy toddlers were randomized depending on their meningococcal priming vaccination background (either meningococcal vaccine naïve or primed with MenC) and received a single dose of either MenACYW Conjugate vaccine or Nimenrix®. They were assessed for immunogenicity at baseline (pre-vaccination) and 30 to 44 days post-vaccination. Safety information were collected post-vaccination and throughout the entire study.

Study Timeline

• Study First Submitted: 2016-11-03
• Study First Submitted QC: 2016-11-03
• Study First Posted: 2016-11-04
• Study Start: 2017-02-24
• Primary Completion: 2017-10-26
• Study Completion: 2017-10-26
• Disposition First Submitted: 2018-10-25
• Disposition First Submitted QC: 2018-10-25
• Disposition First Posted: 2018-10-26
• Results First Submitted: 2020-05-20
• Results First Submitted QC: 2020-05-20
• Results First Posted: 2020-06-09
• Status Verified: 2022-03
• Last Update Submitted: 2022-03-24
• Last Update Posted: 2022-04-05

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 918

Inclusion Criteria

• Aged 12 to 23 months on the day of the first study visit.
• Participants had received all recommended standard-of-care non-meningococcal vaccinations according to his/her age as per local regulations.
• Informed consent form (ICF) had been signed and dated by the parent/legally acceptable representative.
• Participant and parent/legally acceptable representative were able to attend all scheduled visits and complied with all trial procedures.
• Covered by health insurance if required by local regulations.
• Participants had received any meningococcal vaccine in the second year of life (i.e., from 12 months of age).
• For Inclusion in Groups 1 and 2: Participants must not had received any vaccination against meningococcal disease with either a trial vaccine or a licensed meningococcal vaccine (i.e., polyvalent, polysaccharide, or Conjugate meningococcal vaccine containing serogroups A, C, W, Y, B; or any monovalent or bivalent meningococcal vaccine).
• For Inclusion in Groups 3 and 4: Participants must had previously received at least 1 dose of licensed monovalent meningococcal C Conjugate (MenC) vaccine during infancy (i.e., before 12 months of age).

Exclusion Criteria

• Participation in the 4 weeks preceding the trial vaccination or planned participation during the present trial period in another clinical trial investigating a vaccine, drug, medical device, or medical procedure.
• Receipt of any vaccine in the 4 weeks (28 days) preceding the trial vaccination or planned receipt of any vaccine prior to Visit 2 except for influenza vaccination, which may be received at least 2 weeks before or after study investigational vaccines. This exception included monovalent pandemic influenza vaccines and multivalent influenza vaccines.
• Receipt of immune globulins, blood or blood-derived products in the past 3 months.
• For Groups 1 and 2 only: Vaccination against meningococcal disease with either a trial vaccine or a licensed meningococcal vaccine (i.e., polyvalent, polysaccharide, or Conjugate meningococcal vaccine containing serogroups A, C, W, Y, B; or any monovalent or bivalent meningococcal vaccine).
• For Groups 3 and 4 only: Vaccination against meningococcal disease with either a trial vaccine or a licensed meningococcal vaccine (i.e., polyvalent, polysaccharide, or Conjugate meningococcal vaccine containing serogroups A, C, W, Y, B; or any monovalent B meningococcal vaccine), except licensed monovalent meningococcal C Conjugate (MenC) vaccination received during infancy.
• Known or suspected congenital or acquired immunodeficiency; or receipt of immunosuppressive therapy, such as anti-cancer chemotherapy or radiation therapy, within the preceding 6 months; or long-term systemic corticosteroid therapy (prednisone or equivalent for more than 2 consecutive weeks within the past 3 months).
• History of meningococcal infection, confirmed either clinically, serologically, or microbiologically.
• At high risk for meningococcal infection during the trial (specifically, but not limited to, participants with persistent complement deficiency, with anatomic or functional asplenia, or participants travelling to countries with high endemic or epidemic disease).
• Known systemic hypersensitivity to any of the vaccine components, or history of a life-threatening reaction to the vaccines used in the trial or to a vaccine containing any of the same substances.
• Personal history of an Arthus-like reaction after vaccination with a tetanus toxoid-containing vaccine.
• Personal history of Guillain-Barré Syndrome.
• Verbal report of thrombocytopenia, as reported by the parent/legally acceptable representative contraindicating intramuscular vaccination in the Investigator's opinion.
• Bleeding disorder or receipt of anticoagulants in the 3 weeks preceding inclusion, contraindicating intramuscular vaccination in the Investigator's opinion.
• Chronic illness that, in the opinion of the Investigator, is at a stage where it might interfere with trial conduct or completion.
• Moderate or severe acute illness/infection (according to Investigator judgment) on the day of vaccination or febrile illness (temperature ≥ 38.0°C). A prospective participant should not be included in the study until the condition has resolved or the febrile event has subsided.
• Receipt of oral or injectable antibiotic therapy within 72 hours prior to the first blood draw - Identified as a natural or adopted child of the Investigator or employee with direct involvement in the proposed study.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Group 2 (Meningococcal Vaccine-Naive): Nimenrix®	Meningococcal polysaccharide groups A, C, W-135 and Y Conjugate vaccine	Healthy, meningococcal vaccine naive toddlers aged 12 to 23 months received a single dose of Nimenrix® vaccine on Day 0.
Group 3 (MenC-Primed): MenACYW Conjugate Vaccine	Meningococcal Polysaccharide (Serogroups A, C, Y, and W) Tetanus Toxoid Conjugate Vaccine	Healthy, meningococcal C vaccine primed toddlers aged 12 to 23 months received a single dose of MenACYW Conjugate vaccine on Day 0.
Group 1(Meningococcal Vaccine-Naive):MenACYW Conjugate Vaccine	Meningococcal Polysaccharide (Serogroups A, C, Y, and W) Tetanus Toxoid Conjugate Vaccine	Healthy, meningococcal vaccine naive toddlers aged 12 to 23 months received a single dose of MenACYW Conjugate vaccine on Day 0.
Group 4 (MenC-Primed): Nimenrix®	Meningococcal polysaccharide groups A, C, W-135 and Y Conjugate vaccine	Healthy, meningococcal C vaccine primed toddlers aged 12 to 23 months received a single dose of Nimenrix® vaccine on Day 0.

Primary Outcome Measures

Name	Time	Method
Percentage of Participants With Antibody Titers Greater Than or Equal to (>=) 1:8 Against Meningococcal Serogroups A, C, Y, and W in Toddlers Who Either Were Meningococcal Vaccine Naïve or Had Received Monovalent MenC Vaccination During Infancy	Day 30 (post-vaccination)	Antibody titers against Meningococcal Serogroups A, C, Y, and W were measured by serum bactericidal assay using human complement (hSBA). Data for this outcome measure were planned to be analyzed for the pooled population of MenACYW Conjugate vaccine and Nimenrix® reporting groups.
Percentage of Participants With Antibody Titers >=1:8 Against Meningococcal Serogroups A, C, Y, and W Following Vaccination With MenACYW Conjugate Vaccine or Nimenrix® in Meningococcal Vaccine Naïve Toddlers	Day 30 (post-vaccination)	Antibody titers against Meningococcal Serogroups A, C, Y, and W were measured by hSBA.

Secondary Outcome Measures

Name	Time	Method
Geometric Mean Titers (GMTs) of Antibodies Against Meningococcal Serogroups A, C, Y, and W in Toddlers Who Either Were Meningococcal Vaccine Naïve or Had Received Monovalent MenC Vaccination During Infancy	Day 30 (post-vaccination)	Antibody titers against Meningococcal Serogroups A, C, Y, and W were measured by hSBA.
Geometric Mean Titers of Antibodies Against Meningococcal Serogroups A, C, Y, and W Following Vaccination With MenACYW Conjugate Vaccine or Nimenrix® in Vaccine Naive Toddlers	Day 30 (post-vaccination)	Antibody titers against Meningococcal Serogroups A, C, Y, and W were measured by hSBA.
Geometric Mean Titers of Antibodies Against Meningococcal Serogroups A, C, Y, and W Following Vaccination With MenACYW Conjugate Vaccine or Nimenrix® in Toddlers Who Had Received Monovalent MenC Vaccination During Infancy	Day 30 (post-vaccination)	Antibody titers against Meningococcal Serogroups A, C, Y, and W were measured by hSBA.

Trial Locations

Locations (33)

Investigational Site 306; 🇫🇮 Helsinki, Finland

Investigational Site 310; 🇫🇮 Turku, Finland

Investigational Site 305; 🇫🇮 Seinäjoki, Finland

Investigational Site 308; 🇫🇮 Tampere, Finland

Investigational Site 102; 🇭🇺 Budapest, Hungary

Investigational Site 101; 🇭🇺 Budapest, Hungary

Investigational Site 303; 🇫🇮 Pori, Finland

Investigational Site 307; 🇫🇮 Oulu, Finland

Investigational Site 301; 🇫🇮 Helsinki, Finland

Investigational Site 302; 🇫🇮 Järvenpää, Finland

Investigational Site 304; 🇫🇮 Kokkola, Finland

Investigational Site 309; 🇫🇮 Espoo, Finland

Investigator Site 406; 🇩🇪 Hamburg, Germany

Investigator Site 401; 🇩🇪 Bramsche, Germany

Investigator Site 407; 🇩🇪 Bretten, Germany

Investigator Site 412; 🇩🇪 Aschaffenburg, Germany

Investigator Site 413; 🇩🇪 Datteln, Germany

Investigator Site 415; 🇩🇪 Hamburg, Germany

Investigator Site 404; 🇩🇪 Ludwigsfelde, Germany

Investigational Site 104; 🇭🇺 Győr, Hungary

Investigator Site 201; 🇪🇸 Sevilla, Spain

Investigator Site 409; 🇩🇪 Rosenheim, Germany

Investigator Site 403; 🇩🇪 Tauberbischofsheim, Germany

Investigational Site 105; 🇭🇺 Miskolc, Hungary

Investigator Site 203; 🇪🇸 Barcelona, Spain

Investigator Site 205; 🇪🇸 Madrid, Spain

Investigator Site 204; 🇪🇸 Galicia, Spain

Investigator Site 408; 🇩🇪 Goch, Germany

Investigator Site 402; 🇩🇪 Tauberbischofsheim, Germany

Investigator Site 202; 🇪🇸 Madrid, Spain

Investigator Site 411; 🇩🇪 Bönnigheim, Germany

Investigational Site 103; 🇭🇺 Szeged, Hungary

Investigational Site 106; 🇭🇺 Székesfehérvár, Hungary