Abstract
Reduced protein expression of the BAF complex (also known as SWI/SNF) tumor suppressor SMARCB1 is frequently observed in human synovial sarcoma, a soft-tissue malignancy driven by the oncogenic SS18-SSX fusion, which competes with wild-type SS18 for BAF complex incorporation. In this issue of Cancer Discovery, Li and Mulvihill reveal that low-expressed SMARCB1 has a functional role in synovial sarcomagenesis in mouse models expressing the SS18-SSX2 fusion and present evidence that SMARCB1 reduction in synovial sarcoma is due to wholesale degradation of canonical BAF complexes.See related article by Li et al., p. 2620.
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