title: Meningococcal serogroup C polysaccharide specific memory B cells, directly enumerated by labeled polysaccharide, are not affected by age at vaccination.
abstract: The influence of age on the generation and persistence of specific memory B cells after vaccination with Neisseria meningitidis type C polysaccharide (MenC-PS) conjugate is unknown. MenC-PS-specific B cells could be directly enumerated by fluorochrome-labeled MenC-PS and flow cytometry in blood up to at least 4 years after vaccination, ranging from 0.01% to 0.78% of total B cells and did not correlate with age at vaccination. The percentage of MenC-specific memory B cells out of total memory B cells correlated with total MenC-specific B-cells and with frequencies of IgA(+) plus IgG(+) MenC-specific AbSC, but not with MenC-specific Ab.
authors.affiliation: Department of Immunology, Landspitali-University Hospital, Reykjavik, Iceland.
authors.forename: Maren
authors.initials: M
authors.lastname: Henneken
authors.forename: Nicolas
authors.initials: N
authors.lastname: Burdin
authors.forename: Einar
authors.initials: E
authors.lastname: Thoroddsen
authors.forename: Sigurveig Th
authors.initials: ST
authors.lastname: Sigurdardottir
authors.forename: Emanuelle
authors.initials: E
authors.lastname: Trannoy
authors.forename: Ingileif
authors.initials: I
authors.lastname: Jonsdottir
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000907:Antibodies, Bacterial / Q000097:blood / Q000276:immunology; D001402:B-Lymphocytes / Q000276:immunology*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007156:Immunologic Memory / Q000276:immunology*; D007223:Infant; D007963:Leukocytes, Mononuclear / Q000276:immunology; D008297:Male; D008589:Meningococcal Infections / Q000276:immunology / Q000517:prevention & control*; D022401:Meningococcal Vaccines / Q000276:immunology*; D008875:Middle Aged; D038542:Neisseria meningitidis, Serogroup C / Q000276:immunology; D011135:Polysaccharides, Bacterial / Q000276:immunology; D018074:Vaccines, Conjugate / Q000276:immunology; D055815:Young Adult
chemical_list: D000907:Antibodies, Bacterial; D022401:Meningococcal Vaccines; D011135:Polysaccharides, Bacterial; D018074:Vaccines, Conjugate; C037676:meningococcal group C polysaccharide