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Biology 2015, 4(3), 525-539; doi:10.3390/biology4030525

The Mucosal Immune System of Teleost Fish

Center for Evolutionary and Theoretical Immunology (CETI), Department of Biology, MSC03 2020, University of New Mexico, Albuquerque, NM 87131, USA
Academic Editor: Brian Dixon
Received: 2 June 2015 / Revised: 5 August 2015 / Accepted: 5 August 2015 / Published: 12 August 2015
(This article belongs to the Special Issue Current Understanding of Fish Immune Systems)
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Abstract

Teleost fish possess an adaptive immune system associated with each of their mucosal body surfaces. Evidence obtained from mucosal vaccination and mucosal infection studies reveal that adaptive immune responses take place at the different mucosal surfaces of teleost. The main mucosa-associated lymphoid tissues (MALT) of teleosts are the gut-associated lymphoid tissue (GALT), skin-associated lymphoid tissue (SALT), the gill-associated lymphoid tissue (GIALT) and the recently discovered nasopharynx-associated lymphoid tissue (NALT). Teleost MALT includes diffuse B cells and T cells with specific phenotypes different from their systemic counterparts that have co-evolved to defend the microbe-rich mucosal environment. Both B and T cells respond to mucosal infection or vaccination. Specific antibody responses can be measured in the gills, gut and skin mucosal secretions of teleost fish following mucosal infection or vaccination. Rainbow trout studies have shown that IgT antibodies and IgT+ B cells are the predominant B cell subset in all MALT and respond in a compartmentalized manner to mucosal infection. Our current knowledge on adaptive immunity in teleosts is limited compared to the mammalian literature. New research tools and in vivo models are currently being developed in order to help reveal the great intricacy of teleost mucosal adaptive immunity and help improve mucosal vaccination protocols for use in aquaculture. View Full-Text
Keywords: mucosal immunity; MALT; B cells; T cells; teleosts mucosal immunity; MALT; B cells; T cells; teleosts
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Salinas, I. The Mucosal Immune System of Teleost Fish. Biology 2015, 4, 525-539.

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