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BTX161, a Thalidomide analog, is a potent CKIα degrader. BTX161 mediates degradation of CKIα better than Lenalidomide in human AML cells and activates DNA damage response (DDR) and p53, while stabilizing the p53 antagonist MDM2[1].

BTX161 (25 μM; 4 hours; MV4-11 cells) upregulates all the Wnt targets including MYC and did not affect MDM2 mRNA expression[1].BTX161 (10 μM; 6 hours; MV4-11 cells), on its own, augmented p53 and MDM2 protein expression, yet in combination with THZ1, and particularly with both THZ1 and CDK9, further augmented p53 and induced maximal caspase 3 activation[1].

[1]. Minzel W, et al. Small Molecules Co-targeting CKIα and the Transcriptional Kinases CDK7/9 Control AML in Preclinical Models. Cell. 2018;175(1):171-185.e25.

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