{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\n Multiple recent studies have demonstrated that the long noncoding RNA MAFG‑AS1 is frequently overexpressed in a variety of malignancies—including colorectal, lung (adenocarcinoma and non‑small cell), breast (including estrogen receptor–positive subtypes), hepatocellular, gastric, bladder, ovarian, esophageal, pancreatic, and even brain cancers—and its aberrant expression is generally associated with advanced tumor stage, metastasis, and poor patient prognosis."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "1", "end_ref": "5"}]}, {"type": "t", "text": "\n "}]}, {"type": "t", "text": "\n "}, {"type": "p", "children": [{"type": "t", "text": "\n Functionally, MAFG‑AS1 exerts its oncogenic role primarily by acting as a competing endogenous RNA (ceRNA) that sponges various tumor‐suppressive microRNAs—such as miR‑147b in colorectal cancer; miR‑744‑5p in lung adenocarcinoma; miR‑339‑5p in non–small cell lung and breast cancers; miR‑150‑5p and miR‑574‑5p in breast cancer; miR‑125b‑5p and miR‑143‑3p in bladder cancer; miR‑149‑3p in colorectal cancer; and miR‑765 in esophageal cancer—thereby derepressing diverse oncogenic factors (including NDUFA4, MAF, MMP15, CDK2, MYB, SphK1, COX‑2, OTX1, PLK1, SERPINE1, HOXB8, and PDX1) that drive proliferation, epithelial–mesenchymal transition, invasion, migration, metabolic reprogramming, and resistance to apoptosis."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "6", "end_ref": "12"}]}, {"type": "t", "text": "\n "}]}, {"type": "t", "text": "\n "}, {"type": "p", "children": [{"type": "t", "text": "\n In addition, MAFG‑AS1 has been shown to modulate key signaling pathways (for instance, the JAK2/STAT3 cascade in breast cancer) and to interact with RNA‐binding proteins (such as HuR in bladder cancer) to promote the stability of oncogenic transcripts. Notably, while its overexpression promotes tumorigenesis across multiple contexts, one study also indicated that in non‐malignant periodontal ligament stem cells MAFG‑AS1 is downregulated and may influence Toll‑like receptor 4 expression via interplay with miR‑146a, suggesting that its functional impact may depend on the cellular context."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "13"}]}, {"type": "t", "text": "\n "}]}, {"type": "t", "text": "\n "}, {"type": "p", "children": [{"type": "t", "text": "\n Collectively, these findings indicate that MAFG‑AS1 acts as a central oncogenic regulator by sponging a spectrum of microRNAs and upregulating downstream effectors that control proliferation, cell cycle progression, metastasis and metabolic pathways. This multifaceted role establishes MAFG‑AS1 not only as a promising prognostic biomarker across diverse cancer types but also as a potential therapeutic target for precision oncology."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "14", "end_ref": "17"}]}, {"type": "t", "text": "\n "}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Shanshan Cui, Xi Yang, Lihong Zhang, et al. 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