{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\n Long non‐coding RNA LINC00673 has emerged as an important regulator of tumorigenesis, with its function appearing to be highly context‐dependent across different cancer types. In non‐small cell lung cancer (NSCLC), for example, LINC00673 is frequently upregulated and appears to act in an oncogenic manner. It can function as a competing endogenous RNA by “sponging” microRNAs (e.g. miR‐150–5p) to modulate key epithelial–mesenchymal transition (EMT) regulators such as ZEB1, and it may also repress tumor suppressors (such as NCALD) via interactions with epigenetic modifiers like LSD1, thereby promoting cell proliferation, migration, and invasion."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "1", "end_ref": "3"}]}, {"type": "t", "text": " In lung adenocarcinoma a predominant transcript, LINC00673‐v4, enhances metastasis through facilitating the interaction between DDX3 and CK1ε, which in turn activates the WNT/β‐catenin pathway; similarly, overexpression of LINC00673 can reduce p53 translation, allowing tumor cells to escape senescence."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "4"}]}, {"type": "t", "text": ""}]}, {"type": "t", "text": "\n \n "}, {"type": "p", "children": [{"type": "t", "text": "\n In breast cancer, LINC00673 exerts oncogenic effects by acting as a ceRNA that sponges miR-515–5p, thereby upregulating MARK4 expression and inactivating the Hippo signaling pathway."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "6"}]}, {"type": "t", "text": " Pancreatic cancer studies have yielded contrasting findings; one study indicates that LINC00673 can function as a tumor suppressor by reinforcing the interaction between PTPN11 and an E3 ubiquitin ligase to promote PTPN11 degradation – thereby attenuating SRC-ERK oncogenic signaling"}, {"type": "fg", "children": [{"type": "fg_f", "ref": "7"}]}, {"type": "t", "text": "—whereas other reports associate its elevated expression with poorer clinical outcomes"}, {"type": "fg", "children": [{"type": "fg_f", "ref": "8"}]}, {"type": "t", "text": "or suggest that LINC00673 may inhibit cancer progression through modulation of a miR-504/HNF1A axis."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "9"}]}, {"type": "t", "text": " In papillary thyroid carcinoma, elevated levels of LINC00673 promote proliferation, migration, and invasion by recruiting epigenetic repressors (EZH2 and DNMT1) to suppress p53 expression"}, {"type": "fg", "children": [{"type": "fg_f", "ref": "10"}]}, {"type": "t", "text": ", while in glioma, its upregulation is associated with enhanced cell migration and invasion via activation of the PI3K/AKT signaling pathway."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "11"}]}, {"type": "t", "text": "\n "}]}, {"type": "t", "text": "\n \n "}, {"type": "p", "children": [{"type": "t", "text": "\n In addition to its direct functional roles, genetic polymorphisms in LINC00673—such as the rs11655237 variant—have been linked to cancer susceptibility. Some studies report that the polymorphism is associated with altered LINC00673 expression and an increased risk of cervical cancer"}, {"type": "fg", "children": [{"type": "fg_f", "ref": "12"}]}, {"type": "t", "text": "and overall cancer susceptibility as supported by a meta‐analysis"}, {"type": "fg", "children": [{"type": "fg_f", "ref": "13"}]}, {"type": "t", "text": ", while in other tumors (for example, Wilms tumor) no significant association has been detected."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "14"}]}, {"type": "t", "text": "\n "}]}, {"type": "t", "text": "\n \n "}, {"type": "p", "children": [{"type": "t", "text": "\n Collectively, these findings demonstrate that LINC00673 modulates cancer cell behavior through multiple mechanisms—including microRNA sponging, epigenetic regulation, and alteration of key signaling pathways—with its role varying according to tumor type. This complex, context-dependent functionality underlines the potential of LINC00673 both as a prognostic biomarker and as a therapeutic target in diverse malignancies."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}, {"type": "fg_f", "ref": "7"}, {"type": "fg_f", "ref": "6"}, {"type": "fg_f", "ref": "4"}, {"type": "fg_f", "ref": "2"}, {"type": "fg_fs", "start_ref": "8", "end_ref": "11"}, {"type": "fg_f", "ref": "5"}, {"type": "fg_fs", "start_ref": "12", "end_ref": "14"}]}, {"type": "t", "text": "\n "}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Wei Lu, Honghe Zhang, Yuequn Niu, et al. 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