comparison of several maturation inducing factors in dendritic cell differentiation
نویسندگان
چکیده
background: dendritic cells (dcs) are professional antigen presenting cells that have an important role in the initiation of immune response. the use of maturation factors in dendritic cell differentiation provides a promising approach in immunotherapy. objective: in this study, we compared tumor necrosis factor-α, polyribocytidylic acid, lipopolysacharide and cpg oligonucleotides in inducing dendritic cell maturation. methods: we generated immature dendritic cells with gm-csf in combination with il-4 from peripheral blood mononuclear adherent cells and used tumor necrosis factor-α, polyribocytidylic acid, lipopolysacharide and cpg for the induction of dendritic cell maturation. cd83 maturation marker on the dendritic cells was analyzed by flowcytometry after 7 days. in addition, mixed leukocyte reaction between dendritic cells and t cells was performed by mtt proliferation assay. results: flow cytometry results demonstrated a comparable high level of cd83 expression on the mature dendritic cells generated by tnf-α, cpg, poly i:c, and lps treatment of the immature dendritic cells. however, a significantly poorer proliferation of lymphocytes cocultured with the poly i:c-treated dcs was observed compared to the cpg-treated dcs in mixed leukocyte reaction (p=0.026). conversely, a significantly stronger proliferation of lymphocytes was observed when cocultured with tnf-α-treated dcs compared to the lps-treated dcs (p=0.025). conclusion: our results indicated that all of studied maturation inducing factors can be used in dc maturation but tnf-α and cpg were the preferred in vitro maturation factors. it is concluded that maturation of dendritic cells by cpg motif and tnf-α can be used to regulate immune responses.
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عنوان ژورنال:
iranian journal of immunologyجلد ۷، شماره ۲، صفحات ۸۳-۸۷
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