NLRP3 Regulates Alveolar Bone Loss in Ligature-induced Periodontitis by Promoting Osteoclastic Differentiation

Overview

Journal Cell Prolif

Date 2020 Dec 31

PMID 33382502

Citations 56

Authors

Yuyi Chen

Qiudong Yang

Chunhua Lv

Yue Chen

Wenhua Zhao

Wenlei Li

Hongyu Chen

Hua Wang

Wen Sun

Hua Yuan

Affiliations

Soon will be listed here.

Abstract

Objectives: NLRP3 inflammasome is a critical part of the innate immune system and plays an important role in a variety of inflammatory diseases. However, the effects of NLRP3 inflammasome on periodontitis have not been fully studied.

Materials And Methods: We used ligature-induced periodontitis models of NLRP3 knockout mice (NLRP3 ) and their wildtype (WT) littermates to compare their alveolar bone phenotypes. We further used Lysm-Cre/Rosa mouse to trace the changes of Lysm-Cre osteoclast precursors in ligature-induced periodontitis with or without MCC950 treatment. At last, we explored MCC950 as a potential drug for the treatment of periodontitis in vivo and in vitro.

Results: Here, we showed that the number of osteoclast precursors, osteoclast differentiation and alveolar bone loss were reduced in NLRP3 mice compared with WT littermates, by using ligature-induced periodontitis model. Next, MCC950, a specific inhibitor of the NLRP3 inflammasome, was used to inhibit osteoclast precursors differentiation into osteoclast. Further, we used Lysm-Cre/Rosa mice to demonstrate that MCC950 decreases the number of Lysm-Cre osteoclast precursors in ligature-induced periodontitis. At last, treatment with MCC950 significantly suppressed alveolar bone loss with reduced IL-1β activation and osteoclast differentiation in ligature-induced periodontitis.

Conclusion: Our findings reveal that NLRP3 regulates alveolar bone loss in ligature-induced periodontitis by promoting osteoclastic differentiation.

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