{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,28]],"date-time":"2026-01-28T11:10:42Z","timestamp":1769598642510,"version":"3.49.0"},"reference-count":43,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2014,2,8]],"date-time":"2014-02-08T00:00:00Z","timestamp":1391817600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"name":"New Zealand Dental Association Research Foundation"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J of Periodontal Research"],"published-print":{"date-parts":[[2014,12]]},"abstract":"<jats:sec><jats:title>Background and Objective<\/jats:title><jats:p>The role of two recently identified and closely related T\u2010helper cell subsets \u2013 regulatory T\u2010cells [Tregs; forkhead box P3\u2010positive (<jats:styled-content style=\"fixed-case\">FOXP<\/jats:styled-content>3<jats:sup>+<\/jats:sup>)] and Th17 cells [interleukin\u201017\u2010positive (<jats:styled-content style=\"fixed-case\">IL\u2010<\/jats:styled-content>17<jats:sup>+<\/jats:sup>)] \u2013 in periodontal disease is yet to be determined. Tregs are essential in maintaining peripheral tolerance and regulating the immune response. Th17 cells play a critical role in several autoimmune diseases, inflammation and host defence. The aim of this study was to determine the presence of <jats:styled-content style=\"fixed-case\">FOXP<\/jats:styled-content>3<jats:sup>+<\/jats:sup> Tregs and <jats:styled-content style=\"fixed-case\">IL\u2010<\/jats:styled-content>17<jats:sup>+<\/jats:sup> cells, and their possible spatial interaction, in diseased periodontal tissues.<\/jats:p><\/jats:sec><jats:sec><jats:title>Material and Methods<\/jats:title><jats:p>Twenty\u2010nine archival tissues with nonspecific gingival inflammation were grouped based on the intensity (minimally or intensely inflamed) and nature (T\u2010cell predominant or B\u2010 and plasma\u2010cell predominant) of the inflammatory infiltrate. Using double\u2010labelling immunohistochemistry, the concomitant presence of <jats:styled-content style=\"fixed-case\">FOXP<\/jats:styled-content>3<jats:sup>+<\/jats:sup> and <jats:styled-content style=\"fixed-case\">IL\u2010<\/jats:styled-content>17<jats:sup>+<\/jats:sup> cells was determined and their spatial relationship was established. In addition, the proportions of <jats:styled-content style=\"fixed-case\">FOXP<\/jats:styled-content>3<jats:sup>+<\/jats:sup> and <jats:styled-content style=\"fixed-case\">IL\u2010<\/jats:styled-content>17<jats:sup>+<\/jats:sup> cells were compared between the groups.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Of the 29 gingival specimens investigated, 17 were intensely inflamed (\u2265\u00a01000 inflammatory cells per 0.12\u00a0mm<jats:sup>2<\/jats:sup>) and 12 were minimally inflamed (\u2264\u00a0600 cells per 0.12\u00a0mm<jats:sup>2<\/jats:sup>). Based on the percentage of <jats:styled-content style=\"fixed-case\">CD<\/jats:styled-content>19<jats:sup>+<\/jats:sup> B\u2010cells and plasma cells collectively and <jats:styled-content style=\"fixed-case\">CD<\/jats:styled-content>3<jats:sup>+<\/jats:sup> T\u2010cells, gingival tissues were also grouped into B\u2010 and plasma\u2010cell\u2010predominant gingival tissues (<jats:italic>n<\/jats:italic>\u00a0=\u00a021; 50.7% total B\u2010 and plasma cells vs. 19.1% T cells; <jats:italic>p\u00a0<\/jats:italic>&lt;\u00a00.001) and T\u2010cell\u2010predominant gingival tissues (<jats:italic>n<\/jats:italic>\u00a0=\u00a08; 61.0% T\u2010cells vs. 15.2% B\u2010 and plasma cells; <jats:italic>p<\/jats:italic>\u00a0=\u00a00.007). More <jats:styled-content style=\"fixed-case\">FOXP<\/jats:styled-content>3<jats:sup>+<\/jats:sup> cells than <jats:styled-content style=\"fixed-case\">IL\u2010<\/jats:styled-content>17<jats:sup>+<\/jats:sup> cells were observed in all archival gingival tissues examined. A trend towards an increased number of <jats:styled-content style=\"fixed-case\">FOXP<\/jats:styled-content>3<jats:sup>+<\/jats:sup> cells was observed for intensely inflamed gingival tissues (6.7%) and for B\u2010 and plasma\u2010cell\u2010predominant tissues (6.4%) compared with minimally inflamed gingival tissues (4.6%) and T\u2010cell\u2010predominant gingival tissues (4.5%). However, no statistically significant difference in the mean percentage of <jats:styled-content style=\"fixed-case\">FOXP<\/jats:styled-content>3<jats:sup>+<\/jats:sup> cells between the groups was observed. Interestingly, <jats:styled-content style=\"fixed-case\">FOXP<\/jats:styled-content>3<jats:sup>+<\/jats:sup> cells were significantly correlated with the B\u2010 and plasma\u2010cell\/T\u2010cell ratio in B\u2010 and plasma\u2010cell\u2010predominant tissues (<jats:italic>r<\/jats:italic>\u00a0=\u00a00.713, <jats:italic>p\u00a0<\/jats:italic>&lt;\u00a00.001). Overall, there were very few <jats:styled-content style=\"fixed-case\">IL\u2010<\/jats:styled-content>17<jats:sup>+<\/jats:sup> cells (&lt;\u00a01%). All <jats:styled-content style=\"fixed-case\">IL\u2010<\/jats:styled-content>17<jats:sup>+<\/jats:sup> cells identified in this study had an ovoid\/plasmacytoid morphology and were larger in size compared with adjacent inflammatory cells. <jats:styled-content style=\"fixed-case\">IL\u2010<\/jats:styled-content>17<jats:sup>+<\/jats:sup> and <jats:styled-content style=\"fixed-case\">FOXP<\/jats:styled-content>3<jats:sup>+<\/jats:sup> cells were not adjacent to each other in any of the areas examined, suggesting that <jats:styled-content style=\"fixed-case\">FOXP<\/jats:styled-content>3<jats:sup>+<\/jats:sup> Tregs do not directly interact with <jats:styled-content style=\"fixed-case\">IL\u2010<\/jats:styled-content>17<jats:sup>+<\/jats:sup> cells in diseased gingival tissues. <jats:styled-content style=\"fixed-case\">IL\u2010<\/jats:styled-content>17<jats:sup>+<\/jats:sup>\/<jats:styled-content style=\"fixed-case\">FOXP<\/jats:styled-content>3<jats:sup>+<\/jats:sup> cells were not detected in the tissues examined.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>These results show that <jats:styled-content style=\"fixed-case\">FOXP<\/jats:styled-content>3<jats:sup>+<\/jats:sup> cells are more prominent than <jats:styled-content style=\"fixed-case\">IL\u2010<\/jats:styled-content>17<jats:sup>+<\/jats:sup> cells in periodontal disease processes, which may suggest a predominant role for <jats:styled-content style=\"fixed-case\">FOXP<\/jats:styled-content>3<jats:sup>+<\/jats:sup>cells in periodontal disease. Further studies are required to characterize these cells more precisely and to understand, in more detail, their roles in the pathophysiology of periodontal disease.<\/jats:p><\/jats:sec>","DOI":"10.1111\/jre.12169","type":"journal-article","created":{"date-parts":[[2014,2,8]],"date-time":"2014-02-08T12:57:35Z","timestamp":1391864255000},"page":"817-826","source":"Crossref","is-referenced-by-count":22,"title":["Forkhead box P3\u2010positive regulatory T\u2010cells and interleukin 17\u2010positive T\u2010helper 17 cells in chronic inflammatory periodontal disease"],"prefix":"10.1111","volume":"49","author":[{"given":"V. P. B.","family":"Parachuru","sequence":"first","affiliation":[{"name":"School of Dentistry Sir John Walsh Research Institute University of Otago Dunedin New Zealand"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"D. 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