Antigen-presenting cells cells that can process and present antigens(MHC peptide) to T cells Professional APc Dendritic cell Macrophage B lymphocyte nonprofessional APc Several other cell types, classified as nonprofessional antigen-presenting cells, can be induced to express class II MHc molecules or a co-stimulatory signal Many of these cells function in antigen presentation only for short periods of time during a sustained inflammatory responseAntigen-presenting cells cells that can process and present antigens (MHC￾peptide) to T cells Professional APC Dendritic cell Macrophage B lymphocyte nonprofessional APC ◼ Several other cell types, classified as nonprofessional antigen-presenting cells, can be induced to express class II MHC molecules or a co-stimulatory signal Many of these cells function in antigen presentation only for short periods of time during a sustained inflammatory response