{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\nTIPE1 (TNFAIP8L1) functions as a context‐dependent modulator of tumorigenesis, where its expression can suppress or promote tumor progression depending on the cancer type. In hepatocellular carcinoma, low TIPE1 levels correlate with advanced tumor grade and reduced patient survival, as TIPE1 triggers caspase‐independent apoptosis by negatively regulating Rac1 signaling."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": " In gastric and colon cancers, diminished TIPE1 expression is linked with enhanced epithelial–mesenchymal transition (EMT), stemness, and metastatic potential via deregulation of the Wnt/β‐catenin pathway and increased levels of matrix metalloproteinases, while in breast and lung cancers, TIPE1 downregulation is associated with activated ERK, mTOR/STAT3 signals and more aggressive invasive behavior."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "2", "end_ref": "5"}]}, {"type": "t", "text": " In contrast, in cervical cancer, TIPE1 appears to act paradoxically as an oncogene by binding to p53 and impairing its acetylation, thereby promoting cell proliferation and chemoresistance, a finding further supported by genetic association studies showing that certain TNFAIP8L1 polymorphisms correlate with altered cervical cancer risk."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "6"}]}, {"type": "t", "text": " Similarly, in nasopharyngeal carcinoma, TIPE1 drives tumor progression by inhibiting autophagy through the AMPK/mTOR axis"}, {"type": "fg", "children": [{"type": "fg_f", "ref": "8"}]}, {"type": "t", "text": ", and in osteosarcoma and Ewing’s sarcoma, its tumor‐suppressive action is linked to the downregulation of STAT3 activity via interference with arginine methylation."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "9"}]}, {"type": "t", "text": " Moreover, pan‐cancer analyses indicate that differential TIPE1 expression and epigenetic modifications are associated with cancer prognosis, underscoring its potential as a diagnostic and therapeutic biomarker."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "11"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nBeyond its cell‐intrinsic effects in neoplasia, TIPE1 plays important roles in modulating the tumor microenvironment and non‐neoplastic processes. In dopaminergic neurons, oxidative stress induces TIPE1, which then stabilizes the tuberous sclerosis complex 2 (TSC2) protein, thereby dampening mTOR activity and enhancing autophagy—suggesting a possible link to neurodegenerative disorders such as Parkinson’s disease."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "12"}]}, {"type": "t", "text": " In vascular endothelial cells, TIPE1 overexpression under oxidative stress increases reactive oxygen species (ROS) production, inhibits cellular growth, and upregulates adhesion molecules, cumulatively contributing to endothelial dysfunction and the acceleration of atherogenesis."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "13"}]}, {"type": "t", "text": " Furthermore, TIPE1 is highly expressed in macrophages, where it binds phosphatidylinositol substrates to enhance PI3K/Akt signaling; this shift promotes an alternatively activated macrophage phenotype that can reprogram the tumor microenvironment in favor of cancer progression."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "14"}]}, {"type": "t", "text": " Its wide tissue distribution, including secretory epithelia, supports roles in both normal physiology and carcinogenesis"}, {"type": "fg", "children": [{"type": "fg_f", "ref": "15"}]}, {"type": "t", "text": ", while emerging evidence also points to involvement in metabolic conditions such as non‐alcoholic steatohepatitis."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "16"}]}, {"type": "t", "text": "\n"}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Z Zhang, X Liang, L Gao, et al. 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