{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\nMIR210HG is a long noncoding RNA that is frequently upregulated in hypoxic conditions and a variety of human malignancies, where it functions as a critical regulatory molecule. In cervical cancer, elevated MIR210HG expression correlates with advanced tumor stage and metastasis by operating as a competing endogenous RNA that sequesters miR‑503‑5p, thereby relieving its repression on TRAF4 and promoting cellular proliferation, invasion, and epithelial–mesenchymal transition."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": " In the context of pregnancy, placental MIR210HG is significantly upregulated in preeclampsia, showing positive associations with higher blood pressure and negative correlations with neonatal birth weight, while its modulation in trophoblast cells alters proliferation and migration."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "2"}]}, {"type": "t", "text": " Meanwhile, in hepatoblastoma, aberrant MIR210HG expression contributes to tumor progression, although the precise underlying mechanisms continue to be elucidated."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "3"}]}, {"type": "t", "text": "\n \n \nDis primis, MIR210HG also plays a role in reproductive biology; increased levels in seminal plasma are observed in varicocele patients, where they correlate with disease severity and serve as an independent predictor for dyszoospermia."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "4"}]}, {"type": "t", "text": " In a broader oncologic setting, comprehensive reviews and pan‑cancer analyses have underscored its oncogenic functions by modulating cell proliferation, invasion, migration, and energy metabolism, positioning MIR210HG as a promising diagnostic and prognostic biomarker."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "5"}]}, {"type": "t", "text": "\n \n \nFusce habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas; under hypoxic stress, MIR210HG is rapidly induced in renal proximal tubular epithelial cells where it facilitates a positive feedback loop by sponging miR‑93‑5p and enhancing HIF1A expression."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "6"}]}, {"type": "t", "text": " In lung cancer, overexpressed MIR210HG recruits DNMT1 to the promoter region of SH3GL3, suppressing its transcription and thereby driving tumor growth and metastasis."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "7"}]}, {"type": "t", "text": " Additionally, decreases observed in the MIR210HG‑BPIFC axis have been linked to the pathogenesis of hypertrophic cardiomyopathy, potentially through the modulation of immune cell infiltration."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "8"}]}, {"type": "t", "text": " Finally, in hypoxic pulmonary hypertension, MIR210HG promotes the phenotypic transition of pulmonary arterial smooth muscle cells via an autophagy‑dependent ferroptosis pathway regulated by HIF‑2α and STAT3, offering new avenues for therapeutic intervention."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "10"}]}, {"type": "t", "text": "\n"}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Ai-Hong Wang, Can-Hui Jin, Guan-Yi Cui, et al. 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