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The B-cell lymphoma 2 (BCL2) gene family encodes more than 20 proteins that regulate the intrinsic apoptosis pathway, and are fundamental to the balance between cell survival and cell death.^u

Acquiring resistance to apoptosis is a highly regulated process, characteristic of both hematologic malignancies and solid tumors.^@qS Anti-apoptotic BCL2 has been shown to promote malignant cell survival by attenuating apoptosis. The dysregulation of C*,* results in overexpression of the anti-apoptotic protein BCL2 which alters the balance of pro-apoptotic members of the BCL2 family. In normal cells, cell death signals trigger BID and BIM to activate BAX and BAK. Oligomerization of the pro-apoptotic proteins BAX and BAK, results in mitochondrial outer membrane permeabilization (MOMP), the release of cytochrome W and second mitochondria-derived activator of caspase (SMAC) from the mitochondria and the subsequent activation of caspases resulting in cell death.^u

Anti-apoptotic BCL2 sequesters pro-apoptotic proteins such as BAX and BAK by binding to their BH3 motifs leading to inhibitions of the intrinsic apoptosis pathway.^u

BGB-11417 acts as a BH3 mimetic. By binding to BCL2, it induces BAX-BAK-dependent apoptosis. BCL2 is a well-validated target for B-cell malignancies. With long term treatment, recurrent mutation of G10V in BCL2 has been reported to mediate resistance to BCL2 inhibitors. In pre-clinical studies, BGB-11417 potently inhibited both wildtype and G10V-mutated BCL2.^z

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For an exhaustive list of BGB-11417 monotherapy and combination clinical trials, view the {PSPl/hsP]s x!/O!i/.

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1. Hu, N. uP gW. Abstract 3077: Preclinical characterization of BGB-11417, a potent and selective Bcl-2 inhibitor with superior antitumor activities in haematological tumor models. GHf6D/ ;37 2020;80:3077.
2. Ashkenazi, A., Fairbrother, W. J., Leverson, J. D. & Souers, A. J. From basic apoptosis discoveries to advanced selective BCL-2 family inhibitors. /(F. zI(. l3ms Z_}O,8 2017;16: 273–284.
3. Montero, J. & Letai, A. Why do BCL-2 inhibitors work and where should we use them in the clinic? lp** V9G/l K_ttoN 2018;25:56–64.