RESUMEN
Objective To study the effects of eukaryotic expressive mature peptide LL-37 of human cationic antimicrobial peptide(hCAP-18) on the expressions of membrane molecules on dendritic cells(DCs).Methods By gene cloning,the eukaryotic expressive plasmid pcDNA4/Myc-His-LL-37 for the mature peptide LL-37 of hCAP-18 was constructed.Then they were transfected into HEK293 cell lines.After the cell lines were cultivated for 48 h,the supernatant was collected.Then the DCs from peripheral blood mononuclear cells(PBMCs) induced by rh-GM-CSF and rh-IL-4 were cultivated with the supernatant for 48h.The expressions of membrane molecules CD40 and HLA-DR on DCs were detected by flow cytometry(FCM).Results The eukaryotic expressive plasmid pcDNA4/Myc-His-LL-37 was constructed successfully and it expressed in eukaryotic cells HEK293.FCM results indicated that the expressions of CD40 and HLA-DR on the membrane of DCs which were stimulated by the supernatant produced by pcDNA4/Myc-His-LL-37 were higher than those in control group(P