Abstract:
:Colonization of the nasopharyngeal mucosa by meningococcus and other polysaccharide (PS)-encapsulated bacteria precedes invasion. PS-conjugate vaccines induce PS-specific B-cell memory (B(MEM)) and also prevent colonization, thus blocking person-to-person transmission, generating herd protection. However, in isolation the B(MEM) are unable to sustain immunity. Furthermore, the duration of herd protection the vaccines induce appears limited. We demonstrate that, despite the persistence of PS-specific B(MEM), the population is not maintained within the nasopharynx. Although booster immunization results in the transient appearance of PS-specific B(MEM) within the mucosa, this reflects the re-circulation of systemic B(MEM) through the site rather than the generation of resident mucosal B(MEM). The induction of sustained PS-specific B(MEM) in the nasopharynx would allow the population to be activated by colonization, thus inhibiting subsequent invasion. It would also be expected to boost local mucosal immunity, thus extending herd protection. Strategies to generate PS-specific B(MEM) in the mucosa warrant further investigation.
journal_name
Mucosal Immunoljournal_title
Mucosal immunologyauthors
Clarke ET,Williams NA,Dull PM,Findlow J,Borrow R,Finn A,Heyderman RSdoi
10.1038/mi.2012.70subject
Has Abstractpub_date
2013-03-01 00:00:00pages
288-96issue
2eissn
1933-0219issn
1935-3456pii
mi201270journal_volume
6pub_type
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