{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\n C17orf99, which encodes the novel cytokine interleukin‐40 (IL‐40), is emerging as an important mediator of B cell–associated immune functions. IL‐40 appears to play a dual role in regulating humoral immunity and in modulating inflammatory responses. On one hand, increased expression of IL‐40 has been documented in autoimmune conditions such as rheumatoid arthritis, where its production by B cells correlates with elevated autoantibody titers, chemokine levels, and enhanced secretion of inflammatory mediators from synovial fibroblasts; these findings underscore a role for IL‐40 in promoting local inflammation and tissue remodeling."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": " On the other hand, studies employing IL‐40–deficient mice in models of ocular herpes simplex virus infection indicate that the absence of IL‐40 is associated with reduced viral titers, suggesting that IL‐40 may normally modulate the balance of cytokine responses that influence viral replication and clearance."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "2"}]}, {"type": "t", "text": " In addition, computational and structural annotation pipelines applied to uncharacterized proteins on human chromosome 17 have confidently predicted specific molecular functions for several targets, including C17orf99, thereby supporting its involvement in immune regulation."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "3"}]}, {"type": "t", "text": " Furthermore, independent identification of a novel B cell–associated cytokine encoded by an uncharacterized gene has also contributed to our understanding of IL‐40’s role in modulating B cell homeostasis and adaptive immune responses."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "4"}]}, {"type": "t", "text": "\n "}]}, {"type": "t", "text": "\n "}, {"type": "p", "children": [{"type": "t", "text": "\n In summary, the available evidence indicates that C17orf99/IL‐40 functions as a key cytokine linking B cell–mediated responses with inflammatory regulation. Its up‐regulation in autoimmune settings and its modulatory influence on antiviral immunity highlight its potential importance as both a biomarker and a therapeutic target in diseases driven by immune dysregulation.\n "}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Adela Navrátilová, Lucie Andrés Cerezo, Hana Hulejová, et al. 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"}, {"type": "b", "children": [{"type": "t", "text": "Structure and Protein Interaction-Based Gene Ontology Annotations Reveal Likely Functions of Uncharacterized Proteins on Human Chromosome 17."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "J Proteome Res (2018)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1021/acs.jproteome.8b00453"}], "href": "https://doi.org/10.1021/acs.jproteome.8b00453"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "30265558"}], "href": "https://pubmed.ncbi.nlm.nih.gov/30265558"}]}, {"type": "r", "ref": 4, "children": [{"type": "t", "text": "Jovani Catalan-Dibene, Monica I Vazquez, Van Phi Luu, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Identification of IL-40, a Novel B Cell-Associated Cytokine."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "J Immunol (2017)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.4049/jimmunol.1700534"}], "href": "https://doi.org/10.4049/jimmunol.1700534"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "28978694"}], "href": "https://pubmed.ncbi.nlm.nih.gov/28978694"}]}]}]}