Mapping of vascular dendritic cells in atherosclerotic arteries suggests their involvement in local immune-inflammatory reactions

Cardiovascular Research
Y V Bobryshev, R S Lord

Abstract

We previously demonstrated that vascular dendritic cells (VDCs) are present in the intima of large arteries and that their numbers are increased in atherosclerotic lesions. This study was undertaken to determine whether VDCs are involved in immune-mediated reactions in atherogenesis. Specimens of carotid artery and aorta were obtained at operation. VDCs were identified with anti-CD1a or with S-100. Co-localisation of VDCs with different intimal cells, including T-cells and macrophages, was studied using a double immunostaining procedure. In areas where the co-localising cells were detected, the peculiarities of expression of HLA-DR, ICAM-1, VCAM-1 were examined. In all the atherosclerotic plaques, VDCs were seen in contact with T-cells, but these co-localising cells were irregularly distributed and were mainly found in zones of neovascularisation containing inflammatory infiltrates. In other areas, T-cell/VDC co-localisation was rarely detected but VDCs were often found in contact with macrophages. VDCs were detected also in the media beneath atherosclerotic lesions and in the adventitia, where they were mostly around vasa vasorum, especially in areas exhibiting signs of acute inflammation. In these areas VDCs expressed ICAM-1,...Continue Reading

Citations

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