NDLI: Priming for Immunologic Memory in Adults by Meningococcal Group C Conjugate Vaccination

Content Provider	PubMed Central
Author	Vu, David M. Boer, Alberdina W. De Danzig, Lisa Santos, George Canty, Bridget Flores, Betty M. Granoff, Dan M.
Copyright Year	2006
Abstract	Meningococcal group C polysaccharide-protein conjugate vaccines (MCV) prime infants and children for memory anticapsular responses upon subsequent exposure to unconjugated polysaccharide. The objective of this study was to determine whether MCV primes vaccine-naïve adults and adults previously vaccinated with meningococcal polysaccharide vaccine (MPSV) for memory antibody responses. Meningococcal vaccine-naïve adults were randomized to receive either MCV (MCV/naïve group) (n = 35) or pneumococcal conjugate vaccine (PCV) (PCV/naïve group) (n = 34). Participants with a history of receiving MPSV were given MCV (MCV/MPSV group) (n = 26). All subjects were challenged 10 months later with one-fifth of the usual dose of MPSV (10 μg of each polysaccharide). Sera were obtained before the conjugate vaccination and before and 7 days after the MPSV challenge and assayed for immunoglobulin G (IgG) anticapsular antibody concentrations and bactericidal titers. The MCV/naïve group had 7- to 10-fold-higher serum IgG and bactericidal responses after the MPSV challenge than the PCV/naïve group (P < 0.001). The increases (n-fold) in anticapsular antibody concentrations in the MCV/naïve group were greatest in subjects with antibody concentrations of ≤2 μg/ml before the challenge (geometric mean increase [n-fold] of 8.3 versus 1.1 in subjects with concentrations of >2 μg/ml before the challenge; P < 0.0001). Only 3 of 11 MCV-vaccinated subjects who had received MPSV before enrollment and who had antibody concentrations of ≤2 μg/ml before the polysaccharide challenge showed more-than-twofold increases in anticapsular antibody concentration or bactericidal titer after the challenge. MCV vaccination of meningococcal vaccine-naïve adults primes for robust memory antibody responses. There was no evidence of induction of memory by MCV in adults previously vaccinated with MPSV.
Related Links	http://dx.doi.org/10.1128/cvi.00123-06
Ending Page	610
Page Count	6
Starting Page	605
File Format	PDF
ISSN	15566811
e-ISSN	1556679X
Journal	Clinical and Vaccine Immunology
Issue Number	6
Volume Number	13
Language	English
Publisher	American Society for Microbiology
Publisher Date	2006-06-01
Access Restriction	Open
Rights Holder	American Society for Microbiology
Subject Keyword	Immunology Immunology and Allergy Microbiology (medical) Clinical Biochemistry Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Immunology and Allergy Clinical Biochemistry Immunology Microbiology (medical)

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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