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Reversible microbial colonization of germ-free mice reveals the dynamics of IgA immune responses.
Science 328, 1705-1709 (2010)
The lower intestine of adult mammals is densely colonized with nonpathogenic (commensal) microbes. Gut bacteria induce protective immune responses, which ensure host-microbial mutualism. The continuous presence of commensal intestinal bacteria has made it difficult to study mucosal immune dynamics. Here, we report a reversible germ-free colonization system in mice that is independent of diet or antibiotic manipulation. A slow (more than 14 days) onset of a long-lived (half-life over 16 weeks), highly specific anticommensal immunoglobulin A (IgA) response in germ-free mice was observed. Ongoing commensal exposure in colonized mice rapidly abrogated this response. Sequential doses lacked a classical prime-boost effect seen in systemic vaccination, but specific IgA induction occurred as a stepwise response to current bacterial exposure, such that the antibody repertoire matched the existing commensal content.
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Anmerkungen
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Publikationstyp
Artikel: Journalartikel
Dokumenttyp
Wissenschaftlicher Artikel
Sprache
englisch
Veröffentlichungsjahr
2010
HGF-Berichtsjahr
0
ISSN (print) / ISBN
0036-8075
e-ISSN
1095-9203
Zeitschrift
Science
Quellenangaben
Band: 328,
Heft: 5986,
Seiten: 1705-1709
Verlag
American Association for the Advancement of Science (AAAS)
Begutachtungsstatus
Peer reviewed
Institut(e)
Institute of Virology (VIRO)
PubMed ID
20576892
Erfassungsdatum
2010-12-31