THAL-SNS-032
目录号 : GC65346THAL-SNS-032 is a selective Cyclin-dependent kinase 9 (CDK9) degrader PROTAC consisting of a CDK-binding SNS-032 ligand linked to a thalidomide derivative that binds the E3 ubiquitin ligase Cereblon (CRBN).
Cas No.:2139287-33-3
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THAL-SNS-032 is a selective Cyclin-dependent kinase 9 (CDK9) degrader PROTAC consisting of a CDK-binding SNS-032 ligand linked to a thalidomide derivative that binds the E3 ubiquitin ligase Cereblon (CRBN).
THAL-SNS-032 is a selective CDK9 degrader consisting of a CDK-binding SNS-032 ligand linked to a thalidomide derivative which binds the E3 ubiquitin ligase Cereblon (CRBN). THAL-SNS-032 induces rapid degradation of CDK9 without affecting the levels of other SNS-032 targets. The transcriptional changes elicited by THAL-SNS-032 are more like those caused by NVP-2 than those induced by SNS-032. Strikingly, compound washout does not significantly reduce levels of THAL-SNS-032-induced apoptosis, suggesting that CDK9 degradation had prolonged cytotoxic effects compared to CDK9 inhibition.[1]
[1] Calla M Olson, et al. Nat Chem Biol. 2018 Feb;14(2):163-170.
Cas No. | 2139287-33-3 | SDF | Download SDF |
分子式 | C40H52N8O10S2 | 分子量 | 869.02 |
溶解度 | DMSO : 100 mg/mL (115.07 mM; Need ultrasonic) | 储存条件 | Store at -20°C, stored under nitrogen |
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Pharmacological perturbation of CDK9 using selective CDK9 inhibition or degradation
Nat Chem Biol 2018 Feb;14(2):163-170.PMID:29251720DOI:10.1038/nchembio.2538.
Cyclin-dependent kinase 9 (CDK9), an important regulator of transcriptional elongation, is a promising target for cancer therapy, particularly for cancers driven by transcriptional dysregulation. We characterized NVP-2, a selective ATP-competitive CDK9 inhibitor, and THAL-SNS-032, a selective CDK9 degrader consisting of a CDK-binding SNS-032 ligand linked to a thalidomide derivative that binds the E3 ubiquitin ligase Cereblon (CRBN). To our surprise, THAL-SNS-032 induced rapid degradation of CDK9 without affecting the levels of other SNS-032 targets. Moreover, the transcriptional changes elicited by THAL-SNS-032 were more like those caused by NVP-2 than those induced by SNS-032. Notably, compound washout did not significantly reduce levels of THAL-SNS-032-induced apoptosis, suggesting that CDK9 degradation had prolonged cytotoxic effects compared with CDK9 inhibition. Thus, our findings suggest that thalidomide conjugation represents a promising strategy for converting multi-targeted inhibitors into selective degraders and reveal that kinase degradation can induce distinct pharmacological effects compared with inhibition.
Antitumoral Activity of a CDK9 PROTAC Compound in HER2-Positive Breast Cancer
Int J Mol Sci 2022 May 13;23(10):5476.PMID:35628286DOI:10.3390/ijms23105476.
Cyclin-dependent kinases (CDKs) are a broad family of proteins involved in the cell cycle and transcriptional regulation. In this article, we explore the antitumoral activity of a novel proteolysis-targeting chimera (PROTAC) compound against CDK9. Breast cancer cell lines from different subtypes were used. Transcriptomic mapping of CDKs in breast cancer demonstrated that the expression of CDK9 predicted a detrimental outcome in basal-like tumors (HR = 1.51, CI = 1.08-2.11, p = 0.015) and, particularly, in the luminal B subtype with HER2+ expression (HR = 1.82, CI = 1.17-2.82, p = 0.0069). The novel CDK9 PROTAC, THAL-SNS-032, displayed a profound inhibitory activity in MCF7, T47D, and BT474 cells, with less effect in SKBR3, HCC1569, HCC1954, MDA-MB-231, HS578T, and BT549 cells. The three cell lines with HER2 overexpression and no presence of ER, SKBR3, HCC1569, and HCC1954 displayed an EC50 three times higher compared to ER-positive and dual ER/HER2-positive cell lines. BT474-derived trastuzumab-resistant cell lines displayed a particular sensitivity to THAL-SNS-032. Western blot analyses showed that THAL-SNS-032 caused a decrease in CDK9 levels in BT474, BT474-RH, and BT474-TDM1R cells, and a significant increase in apoptosis. Experiments in animals demonstrated an inverse therapeutic index of THAL-SNS-032, with doses in the nontherapeutic and toxic range. The identified toxicity was mainly due to an on-target off-tumor effect of the compound in the gastrointestinal epithelium. In summary, the potent and efficient antitumoral properties of the CDK9 PROTAC THAL-SNS-032 opens the possibility of using this type of compound in breast cancer only if specifically delivered to cancer cells, particularly in ER/HER2-positive and HER2-resistant tumors.