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Robust lanthanide-based assays for the detection of anti-apoptotic Bcl-2-family protein antagonists
Authors:Rega Michele F  Reed John C  Pellecchia Maurizio
Institution:Burnham Institute for Medical Research, 10901 North Torrey Pines Rd., La Jolla, CA 92037, USA.
Abstract:Anti-apoptotic Bcl-2-family proteins (Bcl-2, Bcl-x(L), Bfl-1, Mcl-1, Bcl-W and Bcl-B) have been recently validated as drug discovery targets for cancer, owed to their ability to confer tumor resistance to chemotherapy or radiation. The anti-apoptotic activity of Bcl-2 proteins is due to their ability to heterodimerize with their pro-apoptotic counterparts (proteins such as Bad, Bim or Bid) via a conserved peptide region termed BH3. Thus, molecules that mimic pro-apoptotic BH3 domains represent a direct approach to overcoming the protective effects of anti-apoptotic proteins such as Bcl-2 and Bcl-x(L). Here, we report on the development and evaluation of two novel Lanthanide-based assays that are formatted for high-throughput screening of small molecules capable of antagonizing BH3-Bcl-2 interactions. The assay conditions, robustness and reproducibility (Z' factors) are described. These assays represent useful tools to enable further studies in the search for novel, safe and effective anti-cancer agents targeting Bcl-2-family proteins.
Keywords:Bcl-2  FRET  Bcl-xL  Apoptosis  BH3
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