Although the nature of these S-100 positive dendritic cells needs further clarification, the results suggest that these cells play an important role in the development of atherosclerotic lesions, and may represent antigen presenting dendritic cells in human arteries. If the S-100 positive cells prove to be part of the family of antigen presenting dendritic cells, the findings have important implications for understanding atherogenesis and offer a link between immune mechanisms and atherosclerotic lesion formation.

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