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Discovery of a First-in-Class Degrader for Nuclear Receptor Binding SET Domain Protein 2 (NSD2) and Ikaros/Aiolos.
Journal of Medicinal Chemistry 2022 August 12
Overexpression of nuclear receptor binding SET domain protein 2 (NSD2) is frequent in multiple myeloma (MM). However, existing NSD2 inhibitors are largely ineffective in suppressing MM cell proliferation. Here, we report the discovery of a first-in-class NSD2 proteolysis targeting chimera (PROTAC) degrader, 9 (MS159), and two structurally similar controls, 17 (MS159N1) and 18 (MS159N2), with diminished binding to the cereblon (CRBN) E3 ligase and NSD2, respectively. Compound 9 , but not 17 and 18 , effectively degraded NSD2 in a concentration-, time-, CRBN-, and proteasome-dependent manner. Compound 9 also effectively degraded CRBN neo-substrates IKZF1 and IKZF3, but not GSPT1. Importantly, compound 9 was much more effective in suppressing the growth in cancer cells than the parent NSD2 binder. Moreover, compound 9 was bioavailable in mice. Altogether, compound 9 and its two controls 17 and 18 are valuable chemical tools for exploring the roles of NSD2 in health and disease.
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