John Libbey Eurotext




Immunohistochemical localization of activated and mature CD83+ dendritic cells in granulomas of sporotrichosis
European Journal of Dermatology. Volume 11, Number 6, 527-9, November - December 2001, Revues
Free Article
Author(s) : T. KOGA, H. DUAN, K. URABE, M. FURUE
Summary : Dendritic cells (DC) are considered to be the most potent antigen-presenting cells (APC) and CD83 is expressed at a high level on immune-competent, activated and mature DC. In order to obtain insight into the immune response in sporotrichosis, we searched immunohistochemically for CD83+ DC in the granulomatous skin lesions of patients. A small but significant subpopulation of CD83+ DC (approximately 0.2 to 0.8% of inflammatory cells) was found. The most common distribution pattern of CD83+ DC was as clusters with mononuclear lymphoid cells within the granulomas. In addition, CD83+ DC were occasionally scattered around the granulomas. High-intensity staining of CD83 antigens was detected not only on the surface, but also in the cytoplasm of DC. No CD83+ DC were observed in the epidermis. A considerable amount of CD1a+ cells were detected in the epidermis, papillary dermis and around the granulomas, but CD1a+ cells were rarely found within the granulomas. There were large numbers of CD68+ monocytes and macrophages in the granulomas. These results indicate that activated and mature DC may play a role in the immune response to sporotrichosis.
Keywords : APC, Th1-response, immune response, sporotrichosis.

Immunohistochemical localization of activated and mature CD83+ dendritic cells in granulomas of sporotrichosis