Download MendeleyImprovement of Oral Bioavailability of Pyrazolo-Pyridone Inhibitors of the Interaction of DCN1/2 and UBE2M.
Kim, H.S., Hammill, J.T., Scott, D.C., Chen, Y., Rice, A.L., Pistel, W., Singh, B., Schulman, B.A., Guy, R.K.(2021) J Med Chem 64: 5850-5862
- PubMed: 33945681
- DOI: https://doi.org/10.1021/acs.jmedchem.1c00035
- Primary Citation of Related Structures:
7KWA - PubMed Abstract:
The cullin-RING ubiquitin ligases (CRLs) are ubiquitin E3 enzymes that play a key role in controlling proteasomal degradation and are activated by neddylation. We previously reported inhibitors that target CRL activation by disrupting the interaction of defective in cullin neddylation 1 (DCN1), a CRL neddylation co-E3, and UBE2M, a neddylation E2. Our first-generation inhibitors possessed poor oral bioavailability and fairly rapid clearance that hindered the study of acute inhibition of DCN-controlled CRL activity in vivo. Herein, we report studies to improve the pharmacokinetic performance of the pyrazolo-pyridone inhibitors. The current best inhibitor, 40 , inhibits the interaction of DCN1 and UBE2M, blocks NEDD8 transfer in biochemical assays, thermally stabilizes cellular DCN1, and inhibits anchorage-independent growth in a DCN1 amplified squamous cell carcinoma cell line. Additionally, we demonstrate that a single oral 50 mg/kg dose sustains plasma exposures above the biochemical IC 90 for 24 h in mice.
Organizational Affiliation:
Department of Pharmaceutical Sciences, University of Kentucky, Lexington, Kentucky 40508, United States.
