title: CD2 engagement induces dendritic cell activation: implications for immune surveillance and T-cell activation.
abstract: We have shown previously that primary dendritic cells and monocytes express equal levels of CD14 but are distinguishable by the presence of CD2 on dendritic cells. CD2 is known to mediate the activation of T and natural killer (NK) cells through its interaction with CD58. CD2 epitopes recognized by anti-T111, -T112, and -T113 monoclonal antibodies (mAbs) are present on dendritic cells. Here we show that CD2 engagement significantly increases class II, costimulatory (CD40, CD80, CD86), adhesion (CD54, CD58), and CCR7 molecule expression on primary dendritic cells. Conversely, minimal or no change in the expression of the above antigens occurs on monocyte-derived dendritic cells, because these molecules are already maximally expressed. However, both kinds of dendritic cells release interleukin-1beta (IL-1beta) and IL-12 after CD2 engagement. Lastly, interference with dendritic cell CD2-T-cell CD58 engagement decreases naive CD4+CD45RA+ T-cell proliferation. Collectively, our results suggest another role of the CD2-CD58 pathway that allows nonimmune and immune cells to interact directly with dendritic cells and initiate innate and adaptive immune responses.
authors.affiliation: The Center for Blood Research, 800 Huntington Ave, Boston, MA 02115, USA.
authors.forename: Keith
authors.initials: K
authors.lastname: Crawford
authors.forename: Aleksandra
authors.initials: A
authors.lastname: Stark
authors.forename: Betsy
authors.initials: B
authors.lastname: Kitchens
authors.forename: Kerry
authors.initials: K
authors.lastname: Sternheim
authors.forename: Vassilios
authors.initials: V
authors.lastname: Pantazopoulos
authors.forename: Ellen
authors.initials: E
authors.lastname: Triantafellow
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Wang
authors.forename: Baldev
authors.initials: B
authors.lastname: Vasir
authors.forename: Charles E
authors.initials: CE
authors.lastname: Larsen
authors.forename: Dana
authors.initials: D
authors.lastname: Gabuzda
authors.forename: Ellis
authors.initials: E
authors.lastname: Reinherz
authors.forename: Chester A
authors.initials: CA
authors.lastname: Alper
mesh_terms: D000818:Animals; D000954:Antigens, Surface / Q000276:immunology / Q000378:metabolism; D018801:CD2 Antigens / Q000235:genetics / Q000378:metabolism*; D015496:CD4-Positive T-Lymphocytes / Q000166:cytology / Q000276:immunology*; D018968:CD58 Antigens / Q000378:metabolism; D016466:CHO Cells; D002450:Cell Communication / Q000276:immunology; D006224:Cricetinae; D016207:Cytokines / Q000096:biosynthesis; D003713:Dendritic Cells / Q000166:cytology / Q000276:immunology* / Q000378:metabolism*; D004705:Endocytosis / Q000276:immunology; D000939:Epitopes / Q000378:metabolism; D006801:Humans; D016130:Immunophenotyping; D017493:Leukocyte Common Antigens / Q000378:metabolism; D008213:Lymphocyte Activation / Q000276:immunology; D007959:Lymphocyte Culture Test, Mixed; D014162:Transfection
chemical_list: D000954:Antigens, Surface; D018801:CD2 Antigens; D018968:CD58 Antigens; D016207:Cytokines; D000939:Epitopes; D017493:Leukocyte Common Antigens