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Immunobiology Center, Mount Sinai Medical Center, New York, New York 10029
The recognition that immune responses in the intestine differ from those seen systemically has led to a search for novel pathways involved in mucosal immunoregulation. One cell type that has surfaced as a prime candidate for such a regulatory role is the intestinal epithelial cell. A number of laboratories have documented that intestinal epithelial cells sample luminal antigens and process and present these to primed T cells. However, several unique features have emerged, making their potential role as antigen-presenting cells a critical part of mucosal homeostasis.
intestinal epithelium; antigen presentation; nonclassical major histocompatibility complex
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