The invention relates to plasmacytoid dendritic human cell lines and methods for producing the cell lines. More specifically, the invention relates to the plasmacytoid dendritic human cell line called GEN2.2, which is deposited in the CNCM under number CNCM 1-2938 and the plasmacytoid dendritic human cell line called GEN3, which is deposited in the CNCM under number I-3110. The use of cells from the cell lines is also disclosed.