{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\nSHCBP1 is a multifunctional adaptor protein that is aberrantly overexpressed in a broad spectrum of human malignancies—including hepatocellular carcinoma, synovial sarcoma, gliomas, prostate, esophageal, breast, gastric, lung, and pancreatic cancers—where its elevated levels promote oncogenic signaling. Increasing SHCBP1 expression contributes to enhanced cell proliferation, survival, and cell cycle progression via activation of key pathways such as MAPK/ERK, PI3K/AKT/mTOR, NF‑κB, Wnt, and Notch, often through upregulation of cyclin D1 and suppression of apoptotic effectors. These molecular events correlate with aggressive tumor behavior, poor clinical outcomes, and therapy resistance, underscoring the protein’s potential both as a prognostic biomarker and a therapeutic target."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "1", "end_ref": "16"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nIn addition to its oncogenic functions, SHCBP1 is critically involved in cell cycle regulation and the execution of mitosis. Upon stimulation by growth factors such as EGF, EGFR, and HER2, SHCBP1 dissociates from its scaffold partners and—following phosphorylation—translocates into the nucleus. There, it modulates transcriptional activities (for example, by enhancing β‑catenin signaling) and physically interacts with key mitotic regulators including components of the centralspindlin complex, PLK1, and RACGAP1 to ensure proper cytokinesis and successful cell division. These mitotic functions not only facilitate rapid tumor growth but also contribute to the development of chemoresistance and metastatic potential."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "17", "end_ref": "20"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nBeyond its established roles in tumor proliferation and mitosis, SHCBP1 is also co‐opted by pathogens and subject to regulation by noncoding RNAs. For instance, in the context of measles virus infection, SHCBP1 interacts with viral polymerase components to facilitate viral RNA synthesis, suggesting that it may be exploited for efficient viral replication. Moreover, aberrant regulation of SHCBP1 by long noncoding RNAs and microRNAs—in which these noncoding transcripts either sequester or influence its expression—further contributes to tumor progression. 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