XB-ART-28862
Dev Comp Immunol
1986 Jan 01;102:219-33.
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Two cellular pathways regulate the response to TNP-Ficoll in Xenopus laevis.
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The initiation of the anti-TNP response to TNP-Ficoll in the amphibian Xenopus laevis has been studied. Although the response to this antigen is thymus independent in mammals, it is thymus dependent for the first three days following immunization in Xenopus. This thymus regulation is not MHC restricted, since it can be substituted for by thymus xenografts, and by prior or co-injection of heterologous red blood cells or Concanavalin A. The pathway which is activated by the Con A to substitute for the thymus is NMU sensitive, unlike the thymic pathway. The peripheralised alternative pathway is activated by particulate but not soluble TNP-Ficoll. The thymus-dependent and alternative pathways are discussed in terms of their possible nature, regulation and evolutionary significance.
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Species referenced: Xenopus laevis
Genes referenced: mhc1a myh6 nmu