Effects of RARα ligand binding domain mutations on breast fibroepithelial tumor function and signaling.

ABSTRACT: Point mutations in the ligand binding domain of retinoic acid receptor alpha (RARα) are linked to breast fibroepithelial tumor development, but their role in solid tumorigenesis is unclear. In this study, we assessed the functional effects of known RARα mutations on retinoic acid signaling using biochemical and cellular assays. All tested mutants exhibited reduced transcriptional activity compared to wild-type RARα and showed a dominant negative effect, a feature associated with developmental defects and tumor formation. X-ray crystallography revealed that the mutants maintained structural integrity, with altered co-activator recruitment explaining the loss of transcriptional function. Transcriptomics and cell growth assays demonstrated that mutant RARα proteins conferred resistance to lig

SUBMITTER: Huang XX 

PROVIDER: S-EPMC11699204 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature