FDCs are large cells in germinal centers (GCs) of primary and lymphoid tissues. They present non-processed antigen and switch off apoptosis of B cells through a selection process resulting in selection of memory B cells. FDCs express many B cell markers such as CD21 (long isoform), CD23 and CD35. A role for FDCs as been shown in various infectious diseases such as AIDS and transmissible spongiform encephalitis.
FDC; Follicular Dendritic Cells