CBD Promotes Oral Ulcer Healing via Inhibiting CMPK2-Mediated Inflammasome


X.Qi, W. Lin, Y. Wu, Q. Li, X. Zhou, H. Li, Q. Xiao, Y. Wang, B. Shao, Q. Yuan

Published in Journal of Dental Research

 July 2021


Oral ulcer is a common oral inflammatory lesion accompanied by severe pain but with few effective treatments. 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–containing 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 γ (PPARγ) antagonist and partially antagonized by CB1 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 PPARγ in the nucleus and partially by CB1 in the plasma membrane.

Abstract >>

DOI: 10.1177/00220345211024528


Qi, X., Lin, W., Wu, Y., Li, Q., Zhou, X., Li, H., … & Yuan, Q. (2021). CBD Promotes Oral Ulcer Healing via Inhibiting CMPK2-Mediated Inflammasome. Journal of Dental Research, 00220345211024528.