TITLE

IgA is important for clearance and critical for protection from rotavirus infection

AUTHOR(S)
Blutt, S E; Miller, A D; Salmon, S L; Metzger, D W; Conner, M E
PUB. DATE
November 2012
SOURCE
Mucosal Immunology (1933-0219);Nov2012, Vol. 5 Issue 6, p712
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Based on a lack of severe phenotype in human immunoglobulin A (IgA) deficiency syndromes, the role of IgA in controlling respiratory and gastrointestinal (GI) infections has not been clearly defined. C57BL/6 and BALB/c mice lacking IgA (IgA−/−) were developed and used to address this question. When exposed to a common GI virus, rotavirus, IgA−/− mice exhibited a substantial and significant delay in clearance of the initial infection compared with wild-type mice. IgA−/− mice excreted rotavirus in stool up to 3 weeks after the initial exposure compared with 10 days observed in wild-type mice. Importantly, IgA−/− mice failed to develop protective immunity against multiple repeat exposures to the virus. All IgA−/− mice excreted virus in the stool upon re-exposure to rotavirus, whereas wild-type mice were completely protected against re-infection. These findings clearly indicate a critical role for IgA in the establishment of immunity against a GI viral pathogen.
ACCESSION #
82724259

 

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