{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\nSecretogranin III (SCG3) is a member of the granin protein family that plays a central role in the biogenesis of secretory granules and the regulated storage and release of neuropeptides and hormones. Genetic investigations have implicated variants in the SCG3 gene in metabolic disturbances, including metabolic syndrome and obesity, underscoring its importance in energy homeostasis and endocrine regulation. Moreover, SCG3 is recognized alongside other granins in neuroendocrine tissues, with altered processing in various physiological contexts."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "1", "end_ref": "3"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nBeyond its fundamental role in secretory granule formation, SCG3 has emerged as a versatile modulator of disease-specific processes. Recent studies have revealed that, under pathological conditions, SCG3 functions as a highly selective angiogenic factor—promoting abnormal neovascularization in retinal disorders such as diabetic retinopathy and retinopathy of prematurity—while sparing normal vasculature. In the context of neurodegeneration, altered expression and caspase-mediated processing of SCG3 have been associated with neurotoxin-induced apoptosis in dopaminergic neurons, suggesting a role in Parkinson’s disease and possibly Alzheimer’s disease pathology. Furthermore, oncogenic signaling molecules (e.g., HBXIP) have been shown to up-regulate SCG3, leading to enhanced proliferation in hepatocellular carcinoma, thereby linking SCG3 to tumorigenic processes."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "4", "end_ref": "8"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nIn addition to its mechanistic roles, SCG3 has significant clinical and biomarker potential. Its differential expression and distinct post-translational modifications have been documented in neuroendocrine tumors and small cell lung carcinoma, indicating utility in tumor classification and disease monitoring. Furthermore, studies in astrocytes and gliomas have demonstrated that altered levels of SCG3 correlate with cellular activation states and malignancy grade—with higher expression associated with more favorable outcomes in glioblastoma patients—highlighting its promise as a prognostic indicator."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "9", "end_ref": "12"}]}, {"type": "t", "text": "\n"}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Atsushi Tanabe, Takahiro Yanagiya, Aritoshi Iida, et al. 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