Abstract
The clinical development of the meningococcal vaccine, 4CMenB, included 2 doses in vaccine-naïve adolescents, which was considered unlikely to be cost-effective for implementation. Theoretically, priming with 4CMenB in early childhood might drive strong immune responses after only a single booster dose in adolescents and reduce programmatic costs. To address this question, children over 11 years old who took part in previous trials involving the administration of 3–5 doses of 4CMenB at infant/preschool age from 2006 were recruited into a post licensure single-centre trial, and were divided into two groups: those who received their last dose at 12 months old (infant group) and those who received their last dose at 3 years old (infant + preschool group). Naïve age-matched controls were randomised to receive one (adolescent 1 group) or two doses at days 0 and 28 (adolescent 2 group) of 4CMenB. Serum bactericidal antibody (SBA) assays using human complement were performed against three reference strains prior to vaccination, and at 1, 6 and 12 months. Previous vaccination was associated with a higher response to a single booster dose at 11 years of age, one-month post-vaccination, when compared with a single dose in naïve age-matched controls. At day 180, the highest responses were observed in participants in the infant + preschool group against strain 5/99 (GMT 316.1 [CI 158.4 to 630.8]), as compared with naïve adolescents who received two doses (GMTs 84.5 [CI 57.7 to 123.6]). When the last dose was received at 12-months of age, responses to a single adolescent dose were not as robust (GMT 61.1 [CI 14.8 to 252.4] to strain 5/99). This descriptive study indicates that the highest SBA responses after a single dose in adolescence were observed in participants who received a preschool dose, suggesting that B cell memory responses are not sufficiently primed at less than 12 months of age. Trial registration EudraCT 2017-004732-11, ISRCTN16774163.
Original language | English |
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Pages (from-to) | 4453-4463 |
Number of pages | 11 |
Journal | Vaccine |
Volume | 40 |
Issue number | 32 |
DOIs | |
Publication status | Published - 30 Jul 2022 |
Bibliographical note
Funding Information:the authors thank Emma Plested, David Smith and Rachel Craik for project management, the nurses, clinical trials, IT and lab teams at the Oxford Vaccine Group for excellent work, and the participants. The authors thank the protein production facility and Professor Ray Owen in particular for training and support in production of recombinant proteins. CSR, MDS and AJP are Jenner investigators. MDS and AJP are NIHR Senior Investigators. Data sharing the authors commit to making the relevant anonymised patient level data available on reasonable request. Conflict of interest statement: AJP is Chair of UK Dept. Health and Social Care's (DHSC) Joint Committee on Vaccination & Immunisation (JCVI), and is a member of the WHO's SAGE. The views expressed in this article do not necessarily represent the views of DHSC, JCVI, or WHO. The University of Oxford has entered into a partnership with AstraZeneca on coronavirus vaccine development. AJP, CR and CD are named inventors on a patent in the field of meningococcal vaccines. AJP waives all his rights on any patent. MDS is, or has recently been, an investigator on behalf of the University of Oxford on clinical research related to vaccines that is funded by vaccine manufacturers including Pfizer, GlaxoSmithKline, Medimmune, Novavax, Janssen, AstraZeneca and MCM vaccines. RB & AH perform contract research on behalf of UK HSA for GSK, Pfizer and Sanofi Pasteur. LB, AL, LSR, LC, KD, KF, XL, DO'C, HC and HH declare no conflict. The views expressed in this publication are those of the authors. All authors attest they meet the ICMJE criteria for authorship
Funding Information:
This work was supporting by Meningitis Research Foundation (MRF, meningitis.org), award #1702, and by the NIHR Oxford Biomedical Research Center (BRC) Vaccine theme. The funders had no role in study design, data collection, data analysis, data interpretation, writing of the report; and in the decision to submit the article for publication.
Publisher Copyright:
© 2022 The Authors
Keywords
- Adolescent
- Boost
- Clinical trial
- Memory
- Meningococcus
- Persistence
- Vaccine