Journal
JOURNAL DER DEUTSCHEN DERMATOLOGISCHEN GESELLSCHAFT
Volume 7, Issue 10, Pages 862-869Publisher
WILEY
DOI: 10.1111/j.1610-0387.2009.07202.x
Keywords
adaptive immune system; defensins; recombination activating genes; transposon; T-cell receptor
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Funding
- Software AG Stiftung, Darmstadt, Germany
- Zukunftsstiftung Gesundheit, Stuttgart, Germany
- Dr. Hauschka Stiftungand WALA Heilmittel, Bad Boll, Germany
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P>The present review highlights the evolution of the skin-associated immune system from the invertebrates to the vertebrates and man. In the invertebrates a non-specific humoral immune response dominates. It includes antimicrobial peptides, oxidases, lysozyme, agglutinins, coagulins and melanin. The cellular immune system initially consists of undifferentiated mesenchymal stem cells. Later migrating phagocytes and natural killer cells occur. From the fishes on, dendritic cells are present, linking innate and adaptive immune responses. In addition to this unspecific but highly effective immune system, the specific immune response, based on genetic recombination, is present in the vertebrates starting with the chondral fishes. The adaptive immune system possesses unlimited numbers of highly specific antibodies and T-cell receptors, increasingly tissue specific MHC restriction, and cellular memory. Elements of the skin-associated adaptive immune system are first detectable in the teleost fishes in the form of intraepithelial IgM positive lymphocytes and dendritic cells. Moving up to mammals and man, the skin-associated immune system became more and more complex and effective.
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