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| | AlphaLISA Assay |
| Description: | An in-vitro AlphaLISA assay (Perkin Elmer) was developed in order to quantitate the level of PCSK9 secreted into the cell culture media following compound treatment. To detect and measure PCSK9 protein an in-house generated anti-PCSK9 antibody was coupled to AlphaLISA acceptor beads by an external vendor (PerkinElmer) and a second internally developed anti-PCSK9 antibody with an epiptope distinct from that of the acceptor beads was biotinylated in house. Streptavidin coated-donor beads (Perkin Elmer) are also included in the assay mixture which then binds the biotinylated anti-PCSK9 antibody and in the presence of PCSK9 this donor complex and acceptor beads are brought into close proximity. Upon excitation of the donor beads at 680 nm singlet oxygen molecules are released that trigger an energy transfer cascade within the acceptor beads resolving as a single peak of light emitted at 615 nm. The ability of compound to modulate PCSK9 protein levels in conditioned media by AlphaLISA was assessed in the human hepatocellular carcinoma cell line Huh7, stably over-expressing human PCSK9. |
| Affinity data for this assay | |
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