LYG-409 is a highly potent, selective, and orally active GSPT1 molecular glue degrader. LYG-409 induces GSPT1 degradation in KG-1 cells with a DC50 of 7.87 nM. LYG-409 binds to Cereblon with an IC50 of 191 nM, promotes the formation of the CRBN-GSPT1 ternary complex, and induces proteasome-dependent degradation of GSPT1. LYG-409 exhibits broad antiproliferative and GSPT1-degrading activities in a variety of hematologic and solid tumor cells. LYG-409 can be used for studies related to GSPT1-targeted protein degradation, acute myeloid leukemia, and prostate cancer.
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