High-avidity IgA protects the intestine by enchaining growing bacteria

Moor K, Diard M, Sellin ME, Felmy B, Wotzka SY, Toska A, Bakkeren E, Arnoldini M, Bansept F, Co AD, Völler T, Minola A, Fernandez-Rodriguez B, Agatic G, Barbieri S, Piccoli L, Casiraghi C, Corti D, Lanzavecchia A, Regoes RR, Loverdo C, Stocker R, Brumley DR, Hardt WD, Slack E

Nature 544 (7651) 498-502 [2017-04-12; online 2017-04-12]

Vaccine-induced high-avidity IgA can protect against bacterial enteropathogens by directly neutralizing virulence factors or by poorly defined mechanisms that physically impede bacterial interactions with the gut tissues ('immune exclusion'). IgA-mediated cross-linking clumps bacteria in the gut lumen and is critical for protection against infection by non-typhoidal Salmonella enterica subspecies enterica serovar Typhimurium (S. Typhimurium). However, classical agglutination, which was thought to drive this process, is efficient only at high pathogen densities (≥10

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PubMed 28405025

DOI 10.1038/nature22058

Crossref 10.1038/nature22058