Lipofectamine 2000 (Invitrogen)-mediated transfection of constructs
harboring sRAGE sequences to CHO-K1-based CHO–CD14
cell line [27] was performed as previously described [28]. Briefly,
1 lg sRAGE plasmids was transfected to 106 cells pre-seeded in a
35 mm plate. The overnight cell culture medium containing
secreted sRAGE was collected for analyses. A CMV promotor-driven
GFP was co-transfected with sRAGE plasmids as an internal control,
and the transfected cells were analyzed with flow cytometry
to obtain the transfection efficiency.