{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\nStriatin (STRN) functions as a critical scaffold protein that orchestrates rapid, nongenomic signaling by steroid receptors. In vascular endothelial cells, STRN binds directly to estrogen receptor‐α, localizing it to caveolae where it scaffolds a signaling complex that rapidly activates MAPK and Akt kinases together with endothelial nitric oxide synthase (eNOS), while its interaction with the mineralocorticoid receptor influences sodium, water, and blood pressure homeostasis. Both animal models and human genetic studies have further implicated STRN in mediating salt‐sensitive blood pressure responses and aldosterone signaling."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "1", "end_ref": "6"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nIn addition to its physiological roles in cell signaling and homeostasis, STRN can act as an oncogenic fusion partner. Rearrangements joining STRN with receptor tyrosine kinases—such as ALK in thyroid and renal carcinomas, or NTRK3 in certain soft tissue sarcomas—result in constitutive kinase activation and ligand‐independent cell proliferation. These oncogenic fusions have diagnostic and therapeutic implications, as they may serve as targets for specific tyrosine kinase inhibitors."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "7", "end_ref": "11"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nBeyond its roles in receptor signaling and oncogenesis, STRN serves as an essential component of multi‐protein complexes. As a regulatory subunit for protein phosphatase 2A (PP2A), STRN assembles with a variety of kinases and other signaling proteins to form evolutionarily conserved STRIPAK complexes that regulate processes ranging from autophagy to cytoskeletal dynamics. Alternative splice variants of STRN family members exhibit cell type–specific expression and localize to structures such as cell–cell adherens junctions, where they contribute to tissue integrity and may affect disease states including cardiomyopathies. 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