In both acute myeloid leukemia (AML) and synovial sarcoma (SS), targeting BRD9 disrupts oncogenic transcriptional programs, including MYC, leading to reduced proliferation and induction of apoptosis. Researchers from Pamplona Therapeutics (Shenzhen) Co. Ltd. reported the discovery and preclinical efficacy profile of XYD-270, a BRD9-targeting PROTAC, in models of SS and AML.