Abstract:
:Tolerance has been defined as a lack of response to self but a more appropriate definition of tolerance is "any mechanism by which a potentially injurious immune response is prevented, suppressed, or shifted to a non-injurious class of immune response." Thus, tolerance is related to productive self-recognition, rather than blindness of the immune system to its auto-components. Oral tolerance, in this sense, is of unique immunologic importance, as it is a continuous natural immunologic event driven by exogenous antigen. Because of their privileged access to the internal milieu, antigens that are continuously in contact with the mucosa are a frontier between foreign and self-components. Thus, oral tolerance is an immunological mechanism that evolved to treat external agents that gain access to the body via a natural route as internal components that then become part of self. Given this, it would seem logical that autoimmune diseases caused by an inappropriate response to self-antigens might ultimately be treated by presenting such autoantigens to the mucosal surface where they can be dealt with in a non-injurious (noninflammatory) immunologic environment. Furthermore, mucosal tolerance as a treatment for autoimmune diseases is an attractive concept, as antigen-specific therapy is the most physiologic means to manipulate immune responses, and mucosal antigen is nontoxic and can be given on a chronic basis. The efficacy of mucosal tolerance has been clearly demonstrated in several animal models.
journal_name
Ann N Y Acad Scijournal_title
Annals of the New York Academy of Sciencesauthors
Weiner HLdoi
10.1196/annals.1309.053subject
Has Abstractpub_date
2004-12-01 00:00:00pages
211-24eissn
0077-8923issn
1749-6632pii
1029/1/211journal_volume
1029pub_type
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