B-1 cells modulate oral tolerance in mice

B-1 cells modulate oral tolerance in mice

Author De-Gennaro, Luiz Antonio Autor UNIFESP Google Scholar
Popi, Ana Flavia Autor UNIFESP Google Scholar
Almeida, Sandro Rogrio de Google Scholar
Lopes, Jose Daniel Autor UNIFESP Google Scholar
Mariano, Mario Autor UNIFESP Google Scholar
Institution Universidade Federal de São Paulo (UNIFESP)
Universidade de São Paulo (USP)
Abstract Although the origin and functions of B-1 cells are controversial, they are considered as a cellular element of innate immunity due to their ability to produce natural autoantibodies of the IgM type. These antibodies are encoded by a relatively limited repertoire of V genes, and their resulting diversity is smaller than that produced by conventional B cells. B-1 cells constitute the larger fraction of B cells in the peritoneal cavity and migrate to non-specific inflammation sites. in addition, they contribute to the production of IgA antibodies in the intestinal lamina propria. It has been demonstrated that they participate in the induction and maintenance of peripheral tolerance. Herein, the participation of B-1 cells in inducing oral tolerance is evaluated. Unexpectedly, BALB/Xid mice, the animals deficient in B-1 cells, are not tolerized to OVA but instead are responsive to oral immunization. Conversely, BALB/c mice respond to oral tolerance to this antigen. We used these biological characteristics of these animals to investigate whether BA cells are involved in the induction of oral tolerance to OVA. Results show that B-1 cells from BALB/c mice, treated orally with OVA and adoptively transferred to BALB/Xid mice were able to suppress local hypersensitivity reaction and lymphoproliferative cellular response observed in BALB/.Xid mice. These data demonstrate that B-1 cells have regulatory properties and are involved in the induction of oral tolerance. (C) 2009 Elsevier B.V. All rights reserved.
Keywords B-1 cells
Oral tolerance
Language English
Sponsor Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Grant number FAPESP: 04/08506-1
Date 2009-06-04
Published in Immunology Letters. Amsterdam: Elsevier B.V., v. 124, n. 2, p. 63-69, 2009.
ISSN 0165-2478 (Sherpa/Romeo, impact factor)
Publisher Elsevier B.V.
Extent 63-69
Origin http://dx.doi.org/10.1016/j.imlet.2009.04.003
Access rights Closed access
Type Article
Web of Science ID WOS:000267926200002
URI http://repositorio.unifesp.br/handle/11600/31599

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