{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\nPCGEM1 was originally characterized as a prostate‐specific long non‐coding RNA that is overexpressed in aggressive prostate cancer. It has been shown to bind the androgen receptor and enhance both ligand‐dependent and ligand‐independent transcriptional programs, thereby promoting cell proliferation and contributing to castration‐resistance. Elevated expression in high‐risk patient groups is associated with increased colony formation and inhibition of apoptosis in prostate cancer cells. These findings underscore its role as a critical oncogenic driver in prostate cancer."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "1", "end_ref": "4"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nBeyond its impact on AR signaling, PCGEM1 has been implicated in reprogramming tumor cell metabolism and modulating alternative pre‐mRNA splicing. By directly binding to factors such as c-Myc and splicing regulators, this lncRNA promotes glucose uptake, facilitates aerobic glycolysis, and influences the emergence of AR splice variants—all of which provide growth advantages to cancer cells. These layered functions illustrate the multifaceted role of PCGEM1 in sustaining oncogenic programs."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "5", "end_ref": "7"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nIn addition to its well‐documented functions in prostate cancer, aberrant expression of PCGEM1 is observed in a broad array of malignancies including ovarian, non‐small cell lung, endometrial, renal, colorectal, gastric, cervical, glioma, oral squamous cell carcinoma, and osteosarcoma. In these contexts, PCGEM1 commonly acts as a competing endogenous RNA, “sponging” various microRNAs (for example, miR-129-5p, miR-642a-5p) to indirectly regulate oncogenic targets such as STAT3, FGF2, CDT1, SOX4, and others. Such interactions support its roles in enhancing cell proliferation, migration, invasion, and resistance to apoptosis across different tumor types."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "8", "end_ref": "17"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nIn non-malignant conditions such as osteoarthritis, PCGEM1 is similarly overexpressed and functions to promote synoviocyte proliferation while suppressing apoptosis. Acting as a molecular sponge for miRNAs like miR-770, it modulates autophagy and cell survival mechanisms, suggesting that its dysregulation may also contribute to disease progression outside the classical cancer setting."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "18"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nAdditional layers of regulation involve transcriptional control and potential genetic predisposition. Evidence indicates that transcription factors such as MEF2 and architectural proteins like CTCF can modulate PCGEM1 expression, while genetic variations within the PCGEM1 locus may influence prostate cancer susceptibility."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "20"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nFinally, PCGEM1 interfaces with multiple signaling pathways—ranging from STAT3 and TGFβ/Smad to NF-κB and β-catenin—as well as interacting with diverse miRNA-target axes (including miR-129-5p and miR-642a-5p pathways). Such wide-ranging interactions consolidate its role as a central regulator of cell cycle progression, apoptosis, chemoresistance, and metastasis, making PCGEM1 a promising target for therapeutic intervention across several disease models."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "22"}]}, {"type": "t", "text": "\n"}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Liuqing Yang, Chunru Lin, Chunyu Jin, et al. 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