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This study was conducted to determine the effect of local B10 cell induction on periodontal inflammation and bone loss in ligature-induced experimental periodontitis<jats:italic>in vivo<\/jats:italic>. Purified spleen B cells from C57BL\/6J mice (8 to 10 weeks old) were cultured with CD40 ligand (CD40L) and the Toll-like receptor 9 (TLR9) agonist cytidine-phosphate-guanosine oligodeoxynucleotide (CpG) to determine effective IL-10 induction<jats:italic>in vitro<\/jats:italic>. Silk ligatures (size 7-0) were tied around the mouse maxillary second molars on day 0, followed by the injection of CD40L and CpG into the palatal gingiva on days 3, 6, and 9. All the mice were sacrificed, and samples were collected on day 14. CD40L and CpG significantly increased the level of IL-10 production by B cells<jats:italic>in vitro<\/jats:italic>, although the frequencies of CD1d<jats:sup>hi<\/jats:sup>CD5<jats:sup>+<\/jats:sup>and IL-10-producing (IL-10<jats:sup>+<\/jats:sup>) CD45<jats:sup>+<\/jats:sup>cells were decreased. IL-10 was predominantly produced by the CD1d<jats:sup>hi<\/jats:sup>CD5<jats:sup>+<\/jats:sup>subpopulation of B cells.<jats:italic>In vivo<\/jats:italic>, both IL-10 mRNA expression and the number of IL-10<jats:sup>+<\/jats:sup>CD45<jats:sup>+<\/jats:sup>cells were significantly increased after gingival injection of CD40L and CpG. Periodontal bone loss was significantly decreased and the gingival expression of IL-1\u03b2, tumor necrosis factor alpha, and RANKL was significantly reduced. The number of multinucleated tartrate-resistant acid phosphatase-positive cells along the alveolar bone surface was significantly decreased after gingival injection of CD40L and CpG. This study indicates for the first time that the local induction of B10 cell activity could inhibit periodontal inflammation and bone loss.<\/jats:p>","DOI":"10.1128\/iai.00645-16","type":"journal-article","created":{"date-parts":[[2016,10,18]],"date-time":"2016-10-18T20:14:05Z","timestamp":1476821645000},"update-policy":"https:\/\/doi.org\/10.1128\/asmj-crossmark-policy-page","source":"Crossref","is-referenced-by-count":35,"title":["Local Induction of B Cell Interleukin-10 Competency Alleviates Inflammation and Bone Loss in Ligature-Induced Experimental Periodontitis in Mice"],"prefix":"10.1128","volume":"85","author":[{"given":"Pei","family":"Yu","sequence":"first","affiliation":[{"name":"State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China"},{"name":"The Forsyth Institute, Department of Immunology and Infectious Diseases, Cambridge, Massachusetts, 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