A selective BCL-X_L PROTAC degrader achieves safe and potent antitumor activity.

ABSTRACT: B-cell lymphoma extra large (BCL-X_L) is a well-validated cancer target. However, the on-target and dose-limiting thrombocytopenia limits the use of BCL-X_L inhibitors, such as ABT263, as safe and effective anticancer agents. To reduce the toxicity of ABT263, we converted it into DT2216, a BCL-X_L proteolysis-targeting chimera (PROTAC), that targets BCL-X_L to the Von Hippel-Lindau (VHL) E3 ligase for degradation. We found that DT2216 was more potent against various BCL-X_L-dependent leukemia and cancer cells but considerably less toxic to platelets than ABT263 in vitro because VHL is poorly expressed in platelets. In vivo, DT2216 effectively inhibits the growth of several xenograft tumors as a single agent or in combination with other chem

SUBMITTER: Khan S 

PROVIDER: S-EPMC6898785 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature