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Cannabidiol (CBD) is recently emerging for its therapeutic potential in a range of diseases, including inflammatory conditions and cancers. Here we show that CBD oral spray on acid- or trauma-induced oral ulcers on mice tongue inhibits inflammation, relieves pain, and accelerates lesion closure. Notably, the enrichment of genes associated with the NOD, LRR, and NLRP3 pyrin domain\u2013containing protein 3 (NLRP3) inflammasome pathway is downregulated after CBD treatment. The expression of cleaved-gasdermin D (GSDMD) and the percentage of pyroptotic cells are reduced as well. In addition, CBD decreases the expression of cytidine\/uridine monophosphate kinase 2 (CMPK2), which subsequently inhibits the generation of oxidized mitochondria DNA and suppresses inflammasome activation. These immunomodulating effects of CBD are mostly blocked by peroxisome proliferator activated receptor \u03b3 (PPAR\u03b3) antagonist and partially antagonized by CB\n                    <jats:sub>1<\/jats:sub>\n                    receptor antagonist. Our results demonstrate that CBD accelerates oral ulcer healing by inhibiting CMPK2-mediated NLRP3 inflammasome activation and pyroptosis, which are mediated mostly by PPAR\u03b3 in the nucleus and partially by CB\n                    <jats:sub>1<\/jats:sub>\n                    in the plasma membrane.\n                  <\/jats:p>","DOI":"10.1177\/00220345211024528","type":"journal-article","created":{"date-parts":[[2021,7,16]],"date-time":"2021-07-16T05:33:40Z","timestamp":1626413620000},"page":"206-215","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":65,"title":["CBD Promotes Oral Ulcer Healing via Inhibiting CMPK2-Mediated Inflammasome"],"prefix":"10.1177","volume":"101","author":[{"given":"X.","family":"Qi","sequence":"first","affiliation":[{"name":"State Key Laboratory of Oral Diseases, National Clinical Research Centre for Oral Disease, West China Hospital of Stomatology, Sichuan University, Chengdu, 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