{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\nREG1B is a member of the regenerating (REG) gene family that becomes markedly upregulated in epithelial tissues undergoing inflammation and injury. In the human colon, for example, REG1B is expressed by metaplastic Paneth cells and shows an expansion during inflammatory bowel conditions, suggesting a role in mucosal repair. In infectious colitis such as that seen in acute amebiasis, REG1B (along with REG1A) is strongly induced, and its anti‐apoptotic and pro‐proliferative properties appear to help protect the intestinal epithelium from parasite‐induced cell death."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nIn addition to its role in intestinal regeneration, REG1B has been identified as a candidate biomarker in pancreatic cancer, where its elevated levels were highlighted through proteomic studies, and it is implicated in tumor biology. Functional studies in squamous cancer cells indicate that REG1B may modulate cytokine production (for example, upregulating interleukin-6), potentially linking its expression to autocrine or paracrine signaling in neoplastic growth. Moreover, in pancreatic β-cells exposed to inflammatory mediators, activation of the JAK/STAT pathway prompts REG1B expression, supporting a growth‐promoting influence even though genetic analyses have not established a strong association with diabetes."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "3", "end_ref": "5"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nREG1B’s clinical relevance extends into the field of pediatric nutrition and other epithelial disorders. Its concentration in fecal samples has been used to assess environmental enteropathy and is correlated with physical growth in undernourished children, underscoring its potential as a non‐invasive biomarker of gastrointestinal health. In contrast, while molecular studies have evaluated genetic variations in REG1B in the context of diabetes, no strong association has been established. Furthermore, explorations of REG family expression in other tissues—including investigations in head and neck, as well as gallbladder lesions—suggest a broader role for these proteins in both cancer biology and epithelial repair."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "6", "end_ref": "10"}]}, {"type": "t", "text": "\n"}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Atle van Beelen Granlund, Ann Elisabet Østvik, Øystein Brenna, et al. 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"}, {"type": "b", "children": [{"type": "t", "text": "Synergistic activations of REG I α and REG I β promoters by IL-6 and Glucocorticoids through JAK/STAT pathway in human pancreatic β cells."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "J Diabetes Res (2015)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1155/2015/173058"}], "href": "https://doi.org/10.1155/2015/173058"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "25767811"}], "href": "https://pubmed.ncbi.nlm.nih.gov/25767811"}]}, {"type": "r", "ref": 5, "children": [{"type": "t", "text": "Shuetsu Usami, Satoru Motoyama, Souichi Koyota, et al. 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