Journal: PLoS ONE
Article Title: Development of a New DNA Vaccine for Alzheimer Disease Targeting a Wide Range of Aβ Species and Amyloidogenic Peptides
doi: 10.1371/journal.pone.0075203
Figure Lengend Snippet: ( A ) YM3711 was transfected to floating HEK293 cells using the FreeStyle 293 Expression System. After 4 day culture, the supernatant was harvested and filtered. Then, YM3711P were purified with an affinity column (HiTrap NHS-activated HP column) coupled with anti-Aβ1-42 antibodies. The eluate was evaluated by Western blotting with 6E10 mAb. ( B ) Binding assay. YM3711P at concentrations of 2 µg/ml (diamonds), 10 µg/ml (squares) and 20 µg/ml (triangles) or Aβ1-42 (2 µg/ml, circles) were coated onto microtiter wells. After blocking, biotinylated IgG purified from plasma of rabbits that had been vaccinated with YM3711 were applied and followed by HRP-labeled VECTSTAIN Elite ABC Kit. Samples showing O.D. more than 2.5 were further diluted and reexamined. Calculated O.D. values are shown in Panel B. ( C ) Competition assay. YM3711P at a concentration of 2 µg/ml was applied onto microtiter wells. Then, wells were incubated with a mixture of biotinylated anti-YM3711P IgG and unlabeled various competitors at 0.1 to 100 ratios. Competitors included 6E10 (diamonds), 4G8 (squares), anti-AβpE3-42 antibodies (triangles) and unlabeled anti-YM3711P IgG (circles). An asterisk indicates that higher concentration of the reagent was not available.
Article Snippet: Biotinylated anti-mouse IgG and horseradish peroxidase (HRP)-labeled VECTSTAIN Elite ABC Kit (Vector).
Techniques: Transfection, Expressing, Purification, Affinity Column, Western Blot, Binding Assay, Blocking Assay, Labeling, Competitive Binding Assay, Concentration Assay, Incubation