Journal:
Article Title: Lipopolysaccharide-Trap-Fc, a Multifunctional Agent To Battle Gram-Negative Bacteria
doi: 10.1128/IAI.00004-09
Figure Lengend Snippet: LPS-Trap-Fc1 to -Fc4 bind LPS and block LPS-mediated IL-6 production in Mono Mac 6 cells. (A) Supernatants of HEK293T cells transfected with LPS-Trap-Fc1 were incubated in the presence (lane 1) or absence (lane 3) of biotin-LPS. Additionally, supernatants were preincubated with an anti-TLR4/MD-2 MAb (lane 2) or an excess of LPS (lane 4). Complexes were immunoprecipitated with streptavidin-Sepharose, subjected to SDS-PAGE, and analyzed by Western blotting with an anti-FLAG MAb. (B) RAW 264.7 cells were incubated with LPS-Trap-Fc1 or a medium control. Cells were stimulated with 100 ng/ml LPS overnight, and IL-6 levels in supernatants were determined by ELISA. *, P < 0.002 compared to control (Mann-Whitney U test, n = 6).
Article Snippet: For specificity control, some supernatants were preincubated with either 50 μg/ml LPS ( Salmonella enterica serovar Minnesota; Sigma), which has a high binding activity for TLR4/MD-2, or 10 μg/ml anti-mouse TLR4/MD-2 MTS510 MAb (Hycult Biotechnology, Uden, The Netherlands) for 1 h at room temperature.
Techniques: Blocking Assay, Transfection, Incubation, Immunoprecipitation, SDS Page, Western Blot, Enzyme-linked Immunosorbent Assay, MANN-WHITNEY