A Multicenter Study to Evaluate Safety and Immunogenicity of a Live-attenuated Chikungunya Vaccine in Adolescents
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ClinicalTrials.gov Identifier: NCT04650399 |
Recruitment Status :
Completed
First Posted : December 2, 2020
Last Update Posted : May 3, 2024
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Sponsor:
Butantan Institute
Collaborator:
Valneva Austria GmbH
Information provided by (Responsible Party):
Butantan Institute
Tracking Information | |||||||
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First Submitted Date ICMJE | November 25, 2020 | ||||||
First Posted Date ICMJE | December 2, 2020 | ||||||
Last Update Posted Date | May 3, 2024 | ||||||
Actual Study Start Date ICMJE | January 31, 2022 | ||||||
Actual Primary Completion Date | February 13, 2023 (Final data collection date for primary outcome measure) | ||||||
Current Primary Outcome Measures ICMJE |
Seroprotection [ Time Frame: up to Day 29 after single vaccination ] Proportion of subjects with a seroprotective CHIKV antibody level determined by µPRNT (Micro Plaque Reduction Neutralization Test) for baseline negative subjects 28 days post-vaccination.
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Original Primary Outcome Measures ICMJE |
Seroprotection [ Time Frame: 28 days after vaccination ] Proportion of subjects with a seroprotective CHIKV antibody level defined as μPRNT50 ≥ 1:50 for baseline negative subjects 28 days post-vaccination.
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Change History | |||||||
Current Secondary Outcome Measures ICMJE |
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Original Secondary Outcome Measures ICMJE |
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Current Other Pre-specified Outcome Measures | Not Provided | ||||||
Original Other Pre-specified Outcome Measures | Not Provided | ||||||
Descriptive Information | |||||||
Brief Title ICMJE | A Multicenter Study to Evaluate Safety and Immunogenicity of a Live-attenuated Chikungunya Vaccine in Adolescents | ||||||
Official Title ICMJE | A Multicenter, Randomized, Controlled, Double Blinded Pivotal Study to Evaluate Safety and Immunogenicity of a Live-attenuated Chikungunya Virus Vaccine Candidate (VLA1553) in Adolescents Aged 12 Years to <18 Years | ||||||
Brief Summary | This is a prospective, randomized, double-blinded, multicenter, pivotal study evaluating the final dose of VLA1553 (1 x10E4 TCID50 per dose) in comparison to a placebo control. The final dose of VLA1553 or control will be administered as single immunization on Day 1. Overall, approximately 750 male and female subjects aged 12 years to <18 years will be enrolled into the study. | ||||||
Detailed Description | This is a prospective, double-blinded, multicenter, randomized, pivotal Phase 3 study comprising approximately 750 subjects aged 12 years to <18 years randomized in a 2:1 ratio to the live-attenuated CHIKV vaccine candidate (VLA1553) or placebo. The final dose of lyophilized VLA1553 or placebo will be administered as a single intramuscular immunization. Subjects in this study will be stratified by baseline serostatus. The primary objective of the study is to evaluate the immunogenicity and safety of the adult dose of VLA1553 28 days following the single immunization. Immunogenicity evaluations in the immunogenicity subset will include the proportion of subjects with seroprotective neutralizing CHIKV antibody titers above a surrogate threshold indicative of protection. The surrogate of protection reasonably likely to predict clinical benefit has been established in non-human primate passive transfer studies using human sera from the Phase 1 study. Safety data collection and immunogenicity will continue to be assessed until Month 12. | ||||||
Study Type ICMJE | Interventional | ||||||
Study Phase ICMJE | Phase 3 | ||||||
Study Design ICMJE | Allocation: Randomized Intervention Model: Parallel Assignment Masking: Double (Participant, Investigator) Primary Purpose: Prevention |
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Condition ICMJE | Chikungunya | ||||||
Intervention ICMJE |
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Study Arms ICMJE |
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Publications * | Not Provided | ||||||
* Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline. |
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Recruitment Information | |||||||
Recruitment Status ICMJE | Completed | ||||||
Actual Enrollment ICMJE |
750 | ||||||
Original Estimated Enrollment ICMJE | Same as current | ||||||
Actual Study Completion Date ICMJE | February 15, 2024 | ||||||
Actual Primary Completion Date | February 13, 2023 (Final data collection date for primary outcome measure) | ||||||
Eligibility Criteria ICMJE | Inclusion Criteria:
Exclusion Criteria:
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Sex/Gender ICMJE |
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Ages ICMJE | 12 Years to 17 Years (Child) | ||||||
Accepts Healthy Volunteers ICMJE | Yes | ||||||
Contacts ICMJE | Contact information is only displayed when the study is recruiting subjects | ||||||
Listed Location Countries ICMJE | Brazil | ||||||
Removed Location Countries | |||||||
Administrative Information | |||||||
NCT Number ICMJE | NCT04650399 | ||||||
Other Study ID Numbers ICMJE | VLA1553-321 | ||||||
Has Data Monitoring Committee | Yes | ||||||
U.S. FDA-regulated Product |
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IPD Sharing Statement ICMJE |
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Current Responsible Party | Butantan Institute | ||||||
Original Responsible Party | Same as current | ||||||
Current Study Sponsor ICMJE | Butantan Institute | ||||||
Original Study Sponsor ICMJE | Same as current | ||||||
Collaborators ICMJE | Valneva Austria GmbH | ||||||
Investigators ICMJE |
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PRS Account | Butantan Institute | ||||||
Verification Date | May 2024 | ||||||
ICMJE Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP |