Tolerogenic antigen-presenting cells
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Feb 24, 2006
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Mar 28, 2002
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Abstract
It has been found that dendritic cells can be prepared which cannot mature. These cells can provide signal 1 to T cells but cannot provide co-stimulatory signal 2. T cells which are stimulated by the permanently immature dendritic cells therefore anergise, so the dendritic cells are tolerogenic rather than immunogenic. The cells are generally CD40.sup.-ve, CD80.sup.-ve and CD86.sup.-ve, and remain so when stimulated by inflammatory mediators such as lipopolysaccharide. The cells can be prepared conveniently by the culturing adherent embryonic stem cells in the presence of GM-CSF.
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