A Study to Demonstrate Non-inferior Immunogenicity of Yuxi Walvax MPV ACYW® Vaccine in Healthy Subjects Aged 2-10 Years

NCT04450498 | Completed Phase 4

• 1 other identifier: MPV ACYW-004
• Study Type: interventional
• Target: 260
• Locations: 1 country
• Sites: 1

Brief Summary

This is a phase IV, single-center, observer-blind, randomized, controlled vaccine trial in 2 to 10 years old healthy subjects. Each participant will receive a single intramuscular injection of one of the two vaccines either MPV ACYW® vaccine or Menactra ® vaccine according to the vaccine group assignment and will be followed up for one month for immunogenicity evaluation and for 6 months for safety evaluation. Statistical Hypothesis: H0: Seroconversion rate of test group is inferior to that of control group HA: Seroconversion rate of test group is non-inferior to that of control group Sample size calculation: the sample size was calculated based on non-inferiority test with alpha level of 0.025 and 80% power, assuming seroconversion rate in control group was 95% with non-inferiority margin at 10%. The sample size required for the study is 124 per arm. After adjusting for 5% drop-out, the final sample size required is 130 per arm.

Conditions

Neisseria Meningitides Meningitis

Keywords

Neisseria Meningitidis; Non-inferior immunogenicity; Safety

Outcome Measures

Primary Outcomes (1)

• Antibody response at Day 30 post-vaccination

  Percentage of subjects with rSBA (Serum Bactericidal Activity using baby rabbit complement) titer ≥1:128 to A,C,Y,W meningococcal capsular polysaccharide in both vaccine groups 30 days after immunization

  Day 30 post-vaccination

Secondary Outcomes (7)

• Percentages of subjects with post-immunization local and systemic reactions within 7 days following vaccination in both vaccine groups

  Day 7 post-vaccination

• Percentages of subjects with reported Adverse Events within 30 days following vaccination in both vaccine groups

  Day 30 post-vaccination

• Percentages of subjects with reported SAEs within 6 months following vaccination in both vaccine groups

  Day 30 to Day 180 post-vaccination (end of study visit)

• rSBA Geometric mean antibody titers to A,C,Y,W meningococcal capsular polysaccharide in both vaccine groups

  Day 30 post-vaccination

• Percentage of subjects with rSBA titer ≥1:8 to A,C,Y,W meningococcal capsular polysaccharide in both vaccine groups 30 days after immunization

  Day 30 post-vaccination

Study Arms (2)

Walvax MPV ACYW® vaccine group

EXPERIMENTAL

Biological: Yuxi Walvax MPV ACYW® vaccine

Sanofi Pasteur Menactra® vaccine group

ACTIVE COMPARATOR

Biological: Sanofi Pasteur Menactra® vaccine

Interventions

Yuxi Walvax MPV ACYW® vaccine BIOLOGICAL

Walvax MPV ACYW vaccine is a sterile formulation of polysaccharide A,C,Y,W-135. One dose of 0.5 mL contains 50 µg of each A,C,Y,W-135 purified polysaccharide. The vaccine is presented in two vials: one containing the lyophilized cake of A,C,Y,W purified polysaccharides and the other the sterile water for injection as diluent. After reconstitution the one dose of 0.5 mL is ready for subcutaneous injection. The antigen content is similar to other internationally marketed polysaccharide vaccines that have been in use for decades as Menomune® Sanofi and Mencevax® Pfizer , all containing 50 µg of each A,C,Y,W purified polysaccharide that as one dose schedule are recommended for use in subjects \> 2 years of age and have shown to be safe and immunogenic.

Walvax MPV ACYW® vaccine group

Sanofi Pasteur Menactra® vaccine BIOLOGICAL

The vaccine presentation is a full liquid formulation in a single dose of 0.5 mL with the following composition: Meningococcal group A polysaccharide 4 µg; Meningococcal group C polysaccharide 4 µg; Meningococcal group Y polysaccharide 4 µg; Meningococcal group W polysaccharide 4 µg; Diphtheria toxoid protein total 48 µg; Sodium phosphate 0.7 mg; Sodium chloride 4.35 mg.

Sanofi Pasteur Menactra® vaccine group

Eligibility Criteria

• Age: 2 Years - 10 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Child (0-17)

You may qualify if:

• Age 2 to 10 years of age (both included)
• Written informed consent obtained from the mother, father, or guardian of the child.
• Free of obvious health problems and be fully vaccinated according local EPI schedule as established by medical history including physical examination and clinical judgment of the investigator.
• Mother, father, or guardian capable and willing to bring their child or to receive home visits for their child for all follow-up visits.
• Residence in the study area during the study period.

You may not qualify if:

• Vaccination against group A,C,Y,W Neisseria meningitidis in the previous 3 months
• History of allergic disease or known hypersensitivity to any component of the two study vaccines.
• History of serious adverse reactions following administration of vaccines included in the local program of immunization.
• Administration of any other vaccine within 30 days prior to administration of study vaccines or planned vaccination during the first four weeks after the study vaccination.
• Use of any investigational or nonregistered product within 60 days prior to the administration of study vaccines.
• Administration of immunoglobulins and/or any blood products or planned administration during the study participation period.
• Chronic administration (defined as more than 14 days) of immunosuppressants or other immune-modifying agents since birth (including systemic or inhaled corticosteroids, this means prednisone, or equivalent, ≥0.5 mg/kg/day; topical steroids are allowed).
• A family history of congenital or hereditary immunodeficiency.
• History of meningitis or seizures, or any neurological disorder, convulsions, or active tuberculosis.
• Major congenital defects or serious chronic illness, including malnutrition (i.e., weight less than or equal to 3 standard deviations below the mean for 2-5 years old) and immunodeficiency disorder (as per investigator's judgment)
• Acute or chronic, clinically significant pulmonary, cardiovascular, hepatic, or renal functional abnormality, as determined by medical history, physical examination, or laboratory tests, which in the opinion of the investigator might interfere with the well-being of the subject study objectives.
• Any condition or criterion that in the opinion of the investigator might compromise the well-being of the subject or the compliance with study procedures or interfere with the outcome of the study

Sponsors & Collaborators

• Walvax Biotechnology Co., Ltd.: lead

Study Sites (1)

Centre pour le Développement des Vaccins du Mali

Bamako, Mali

Location

Related Publications (1)

• Sow SO, Tapia MD, Haidara FC, Diallo F, Traore Y, Traore A, Kodio M, Borrow R, Townsend-Payne K, Yuan L, Yang S, Shi L, Chen J, Fang G, Lin J, Hu R, Viviani S, Huang Z. Safety and immunogenicity of quadrivalent meningococcal polysaccharide vaccine (MPV ACYW135) compared with quadrivalent meningococcal conjugate vaccine (Menactra(R)) in Malian children. Hum Vaccin Immunother. 2023 Aug 1;19(2):2230829. doi: 10.1080/21645515.2023.2230829. Epub 2023 Jul 4.

  PMID: 37401618 RESULT

MeSH Terms

Conditions

Meningitis, Meningococcal

Condition Hierarchy (Ancestors)

Meningitis, Bacterial; Central Nervous System Bacterial Infections; Bacterial Infections; Bacterial Infections and Mycoses; Infections; Meningococcal Infections; Neisseriaceae Infections; Gram-Negative Bacterial Infections; Central Nervous System Infections; Central Nervous System Diseases; Nervous System Diseases; Meningitis; Neuroinflammatory Diseases

Study Officials

• Samba O Sow, MD, MSc

  Director General

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: phase 4
• Allocation: RANDOMIZED
• Masking: SINGLE
• Who Masked: INVESTIGATOR
• Masking Details: The study will be carried out in an observer blind fashion until database is locked with data collected until Day 30 (Visit 3) after vaccination. The clinical study material, i.e. vaccine packs, will be packaged and encoded according to the randomization list (see Appendix B for example of vaccine labels). At study site, the investigator will assign unblinded designated person(s) responsible for vaccine handling, administration ("Vaccinator") and accountability to ensure that blinding is protected throughout the study procedures and that no other site personnel involved in the conduct of the study has access to the information. After assessment of eligibility of a new subject, the investigator will complete a form that the subject will take to the "vaccinator". The "vaccinator" will administer the vaccine according to the randomization list to the subject without informing neither the subject nor the investigator of the randomization group, i.e. the nature of the vaccine.
• Purpose: PREVENTION
• Intervention Model: PARALLEL
• Sponsor Type: INDUSTRY
• Responsible Party: SPONSOR

Model Details: At Day 0, eligible subjects will be randomized in a 1:1 ratio into either Walvax MPV ACYW® vaccine group (130 subjects) or Sanofi Pasteur Menactra ® vaccine group (130 subjects). A randomization list containing subject numbers and vaccine group assignments will be provided to the investigator. Each participant will receive a single intramuscular injection of one of the two vaccines either MPV ACYW® vaccine or Menactra ® vaccine according to the vaccine group assignment and will be followed up for one month for immunogenicity evaluation and for 6 months for safety evaluation.

Study Record Dates

• First Submitted: June 23, 2020
• First Posted: June 29, 2020
• Study Start: December 23, 2020
• Primary Completion: July 30, 2021
• Study Completion: July 30, 2021
• Last Updated: July 7, 2023

Record last verified: 2023-07

Data Sharing

• IPD Sharing: Will not share

Locations

MA (1)