{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\nIn colorectal cancer, miR‑1269a is upregulated in late‐stage tumors and has been shown to promote metastasis by enhancing cellular invasiveness. TGF‑β signaling induces its expression via Sox4, and in turn, miR‑1269a reinforces this pathway by targeting negative regulators such as Smad7 and HOXD10. This positive feedback loop contributes to the high risk of relapse and metastatic spread seen in patients, suggesting that miR‑1269a may serve as both a prognostic marker and a therapeutic target in colorectal cancer."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": ""}, {"type": "p", "children": [{"type": "t", "text": "\nIn hepatocellular carcinoma, miR‑1269 (along with other microRNAs) has been identified in differential expression analyses and early biomarker panels. Although its detailed mechanism in liver cancer remains under investigation, its association with tumor pathogenesis highlights its potential utility in early diagnosis and prognosis of HCC, especially in the context of hepatitis C virus–related carcinogenesis."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "2"}]}, {"type": "t", "text": ""}, {"type": "p", "children": [{"type": "t", "text": "\nSimilarly, in esophageal cancers—where risk models have incorporated miR‑1269a—its overexpression clearly drives malignant progression. In esophageal squamous cell carcinoma, elevated levels of miR‑1269a promote cell proliferation, migration, and invasion by directly targeting and downregulating the tumor suppressor FAM46C, ultimately facilitating a more aggressive tumor phenotype."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "4"}]}]}]}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Pengcheng Bu, Lihua Wang, Kai-Yuan Chen, et al. 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