High-affinity monoclonal IgA regulates gut microbiota and prevents colitis in mice.
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| Abstract |
Immunoglobulin A (IgA) is the main antibody isotype secreted into the intestinal lumen. IgA plays a critical role in the defence against pathogens and in the maintenance of intestinal homeostasis. However, how secreted IgA regulates gut microbiota is not completely understood. In this study, we isolated monoclonal IgA antibodies from the small intestine of healthy mouse. As a candidate for an efficient gut microbiota modulator, we selected a W27 IgA, which binds to multiple bacteria, but not beneficial ones such as Lactobacillus casei. W27 could suppress the cell growth of Escherichia coli but not L. casei in vitro, indicating an ability to improve the intestinal environment. Indeed W27 oral treatment could modulate gut microbiota composition and have a therapeutic effect on both lymphoproliferative disease and colitis models in mice. Thus, W27 IgA oral treatment is a potential remedy for inflammatory bowel disease, acting through restoration of host-microbial symbiosis.
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| Authors | Shinsaku Okai, Fumihito Usui, Shuhei Yokota, Yusaku Hori-I, Makoto Hasegawa, Toshinobu Nakamura, Manabu Kurosawa, Seiji Okada, Kazuya Yamamoto, Eri Nishiyama, Hiroshi Mori, Takuji Yamada, Ken Kurokawa, Satoshi Matsumoto, Masanobu Nanno, Tomoaki Naito, Yohei Watanabe, Tamotsu Kato, Eiji Miyauchi, Hiroshi Ohno, Reiko Shinkura |
| Journal | Nature microbiology (Nat Microbiol) Vol. 1 Issue 9 Pg. 16103 (Jul 04 2016) ISSN: 2058-5276 [Electronic] England |
| PMID | 27562257 (Publication Type: Journal Article) |
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