A clinical phase II trial with an experimental hexavalent outer membrane vesicle (OMV) vaccine (HexaMen) containing six different porin A (PorAs) was carried out in toddlers (2-3 years) and schoolchildren (7-8 years) in The Netherlands. HexaMen exists of two OMVs each containing three different PorA types. The serum bactericidal activity (SBA) after vaccination against the six PorAs was significantly different and was higher in toddlers than in schoolchildren. After vaccination the SBA against P1.5-2,10 was 4-6 times higher than against P1.7-2,4. The aim of this study was to test whether the differences in SBA could be explained by a difference in subtype-specific antibody avidity maturation. The avidity index (AI) of antibodies against three subtypes (PorA types P1.5-2,10; P1.12-1,13 and P1.7-2,4) was measured by ELISA and evaluated in relation to SBA. A significant avidity maturation for the 3 PorA subtypes was found. This maturation was most pronounced for P1.5-2,10 (mean AI = 72\%), correlating with the highest SBA titres. Generally, the avidity titre correlated best with SBA. No differences in avidity indices against the three tested PorAs were found between toddlers and school children indicating that avidity maturation induced by this vaccine is not age-dependent.
%0 Journal Article
%1 vermont_pora-specific_2004
%A Vermont, C L
%A Dijken, H H Van
%A Groot, R De
%A Alphen, L Van
%A Dobbelsteen, G P J M Van Den
%D 2004
%J Vaccine
%K Activity, Affinity, Antibodies, Antibody Assay, Bacterial Bacterial, Bactericidal Blood Child, Female, G, Humans, Immunoglobulin Immunosorbent Male, Membrane Meningococcal Method, Neisseria Netherlands, Outer Porins, Preschool, Proteins, Vaccination Vaccines, meningitidis, {Double-Blind} {Enzyme-Linked}
%N 23-24
%P 3008--13
%R 10.1016/j.vaccine.2004.02.014
%T PorA-specific differences in antibody avidity after vaccination with a hexavalent Men B outer membrane vesicle vaccine in toddlers and school children
%U http://www.ncbi.nlm.nih.gov/pubmed/15297049
%V 22
%X A clinical phase II trial with an experimental hexavalent outer membrane vesicle (OMV) vaccine (HexaMen) containing six different porin A (PorAs) was carried out in toddlers (2-3 years) and schoolchildren (7-8 years) in The Netherlands. HexaMen exists of two OMVs each containing three different PorA types. The serum bactericidal activity (SBA) after vaccination against the six PorAs was significantly different and was higher in toddlers than in schoolchildren. After vaccination the SBA against P1.5-2,10 was 4-6 times higher than against P1.7-2,4. The aim of this study was to test whether the differences in SBA could be explained by a difference in subtype-specific antibody avidity maturation. The avidity index (AI) of antibodies against three subtypes (PorA types P1.5-2,10; P1.12-1,13 and P1.7-2,4) was measured by ELISA and evaluated in relation to SBA. A significant avidity maturation for the 3 PorA subtypes was found. This maturation was most pronounced for P1.5-2,10 (mean AI = 72\%), correlating with the highest SBA titres. Generally, the avidity titre correlated best with SBA. No differences in avidity indices against the three tested PorAs were found between toddlers and school children indicating that avidity maturation induced by this vaccine is not age-dependent.
@article{vermont_pora-specific_2004,
abstract = {A clinical phase {II} trial with an experimental hexavalent outer membrane vesicle {(OMV)} vaccine {(HexaMen)} containing six different porin A {(PorAs)} was carried out in toddlers (2-3 years) and schoolchildren (7-8 years) in The Netherlands. {HexaMen} exists of two {OMVs} each containing three different {PorA} types. The serum bactericidal activity {(SBA)} after vaccination against the six {PorAs} was significantly different and was higher in toddlers than in schoolchildren. After vaccination the {SBA} against P1.5-2,10 was 4-6 times higher than against P1.7-2,4. The aim of this study was to test whether the differences in {SBA} could be explained by a difference in subtype-specific antibody avidity maturation. The avidity index {(AI)} of antibodies against three subtypes {(PorA} types P1.5-2,10; P1.12-1,13 and P1.7-2,4) was measured by {ELISA} and evaluated in relation to {SBA.} A significant avidity maturation for the 3 {PorA} subtypes was found. This maturation was most pronounced for P1.5-2,10 (mean {AI} = 72\%), correlating with the highest {SBA} titres. Generally, the avidity titre correlated best with {SBA.} No differences in avidity indices against the three tested {PorAs} were found between toddlers and school children indicating that avidity maturation induced by this vaccine is not age-dependent.},
added-at = {2011-03-11T10:05:34.000+0100},
author = {Vermont, C L and Dijken, H H Van and Groot, R De and Alphen, L Van and Dobbelsteen, G P J M Van Den},
biburl = {https://www.bibsonomy.org/bibtex/23b25e351ea944e03d044a278f4d166fe/jelias},
doi = {10.1016/j.vaccine.2004.02.014},
interhash = {7bbf920e71566a774f54aec1d2e9ddaf},
intrahash = {3b25e351ea944e03d044a278f4d166fe},
issn = {{0264-410X}},
journal = {Vaccine},
keywords = {Activity, Affinity, Antibodies, Antibody Assay, Bacterial Bacterial, Bactericidal Blood Child, Female, G, Humans, Immunoglobulin Immunosorbent Male, Membrane Meningococcal Method, Neisseria Netherlands, Outer Porins, Preschool, Proteins, Vaccination Vaccines, meningitidis, {Double-Blind} {Enzyme-Linked}},
month = aug,
note = {{PMID:} 15297049},
number = {23-24},
pages = {3008--13},
timestamp = {2011-03-11T10:06:51.000+0100},
title = {{PorA-specific} differences in antibody avidity after vaccination with a hexavalent Men B outer membrane vesicle vaccine in toddlers and school children},
url = {http://www.ncbi.nlm.nih.gov/pubmed/15297049},
volume = 22,
year = 2004
}