{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\nMYCL1, a member of the Myc proto‑oncogene family, functions as a potent nuclear transcription factor with transforming activity. Its amplification and overexpression have been observed in several malignancies—including Merkel cell carcinoma and small‑cell lung cancer—which underscores its pivotal oncogenic role. In addition, regulatory variants within the 3′‑untranslated region (UTR) of MYCL1 can alter microRNA binding and, hence, modulate gene expression. Distinct functional domains in MYCL1 also confer unique properties compared with other Myc family members, as evidenced by its superior efficiency in promoting induced pluripotent stem cell reprogramming."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "1", "end_ref": "5"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nFunctional studies demonstrate that MYCL1 critically influences tumor behavior by modulating cellular processes such as proliferation, migration, and invasion. In gastric cancer, elevated MYCL1 protein levels correlate with advanced disease stage and poorer patient outcomes, and targeted silencing of MYCL1 in gastric cancer cell lines markedly reduces cell motility and invasive capacity. Moreover, in triple‑negative breast cancer, MYCL1 has been shown to promote progression via activation of the JAK/STAT3 signaling pathway. Investigations in lung cancer have also linked specific MYCL1 genetic variants to alterations in disease progression and patient survival, though some studies report divergent findings across populations."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "6", "end_ref": "14"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nA multitude of clinical studies have explored the association between MYCL1 (often referred to as L‑myc) polymorphisms and cancer susceptibility across a diverse range of malignancies—including esophageal, gastric, colorectal, thyroid, head and neck, bladder, and ovarian cancers. While investigations in some settings, such as bladder cancer or certain non‑small cell lung cancer cohorts, have shown no significant associations, meta‐analyses indicate that specific MYCL1 alleles correlate with more aggressive tumor features (for example, lymph node and distant metastases) and poorer prognoses. In several instances, MYCL1 variants appear to interact with environmental factors (such as tobacco smoke and alcohol consumption) to modulate individual cancer risk, supporting their potential utility as biomarkers for risk stratification and as targets for personalized therapeutic intervention."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "15", "end_ref": "28"}]}, {"type": "t", "text": "\n"}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Kelly G Paulson, Bianca D Lemos, Bin Feng, et al. 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