Abstract:
:Leukotriene B4 receptor 1 (BLT1) triggers the migration of granulocytes and activated T cells; however, its role in B-cell function remains unclear. Here we report that BLT1 is required to induce the production of antigen-specific IgA against oral vaccine through mediating innate immune signals from commensal bacteria. B cells acquire BLT1 expression during their differentiation to IgA+ B cells and plasma cells in Peyer's patches and the small intestinal lamina propria, respectively. BLT1 KO mice exhibited impaired production of antigen-specific fecal IgA to oral vaccine despite normal IgG responses to systemically immunized antigen. Expression of MyD88 was decreased in BLT1 KO gut B cells and consequently led to diminished proliferation of commensal bacteria-dependent plasma cells. These results indicate that BLT1 enhances the proliferation of commensal bacteria-dependent IgA+ plasma cells through the induction of MyD88 and thereby plays a key role in the production of antigen-specific intestinal IgA.
journal_name
Mucosal Immunoljournal_title
Mucosal immunologyauthors
Nagatake T,Hirata SI,Koga T,Kuroda E,Kobari S,Suzuki H,Hosomi K,Matsumoto N,Yanrismet Y,Shimojou M,Morimoto S,Sasaki F,Ishii KJ,Yokomizo T,Kunisawa Jdoi
10.1038/s41385-019-0175-zsubject
Has Abstractpub_date
2019-09-01 00:00:00pages
1082-1091issue
5eissn
1933-0219issn
1935-3456pii
10.1038/s41385-019-0175-zjournal_volume
12pub_type
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