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Saito T, Suenaga S, Fujii M, Kushida Y, Kawauchi Y, Suzuki K, Touma M, Hosono M. Induction of autoimmune gastritis by neonatal thymectomy requires autoantibodies and is prevented by anti-FcγR antibodies. Cell Immunol 2016; 300:1-8. [PMID: 26748859 DOI: 10.1016/j.cellimm.2015.10.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2015] [Revised: 09/22/2015] [Accepted: 10/21/2015] [Indexed: 11/25/2022]
Abstract
The autoantibodies (auto-Abs) that are a hallmark of neonatally thymectomized (NTx) mice with autoimmune gastritis (AIG) have been poorly explored. We investigated their immune significance using B cell-deficient (B(-)) mice and found that B(-) mice are totally resistant to AIG but become susceptible to AIG after receiving bone marrow cells from B(+) mice. This susceptibility is most likely caused by the production of auto-Abs by B cells because B(-) pups also became susceptible to AIG when nourished by an AIG dam producing auto-Abs of the IgG class during the suckling period. NTx B(-) mice receiving purified IgG auto-Abs at this developmental stage similarly developed AIG. Auto-Abs probably act on antigen handling for antigen presentation because the treatment of NTx B(+) mice with anti-FcγR Abs prevented the development of AIG. Auto-Abs are indispensable for AIG development but are not sufficient because auto-Ab treatment did not increase AIG incidence in NTx B(+) mice above the baseline.
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Affiliation(s)
- Tsubasa Saito
- Laboratory of Immunobiology, Department of Life Sciences, Graduate School of Science and Technology, Niigata University, 8050 Ikarashi 2-no-cho, Nishi-ku, Niigata 950-2181, Japan
| | - Satoru Suenaga
- Laboratory of Immunobiology, Department of Life Sciences, Graduate School of Science and Technology, Niigata University, 8050 Ikarashi 2-no-cho, Nishi-ku, Niigata 950-2181, Japan
| | - Masato Fujii
- Laboratory of Immunobiology, Department of Life Sciences, Graduate School of Science and Technology, Niigata University, 8050 Ikarashi 2-no-cho, Nishi-ku, Niigata 950-2181, Japan
| | - Yoshihiro Kushida
- Laboratory of Immunobiology, Department of Life Sciences, Graduate School of Science and Technology, Niigata University, 8050 Ikarashi 2-no-cho, Nishi-ku, Niigata 950-2181, Japan
| | - Yusuke Kawauchi
- Department of Gastroenterology and Hepatology, Graduate School of Medical and Dental Science, Niigata University, 757 Ichibancho, Asahimachidori, Chuo-ku, Niigata 951-8510, Japan
| | - Kenji Suzuki
- Department of Gastroenterology and Hepatology, Graduate School of Medical and Dental Science, Niigata University, 757 Ichibancho, Asahimachidori, Chuo-ku, Niigata 951-8510, Japan
| | - Maki Touma
- Department of Biology, Faculty of Science, Niigata University, 8050 Ikarashi 2-no-cho, Nishi-ku, Niigata 950-2181, Japan.
| | - Masamichi Hosono
- Laboratory of Immunobiology, Department of Life Sciences, Graduate School of Science and Technology, Niigata University, 8050 Ikarashi 2-no-cho, Nishi-ku, Niigata 950-2181, Japan.
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