PMID- 33641180 OWN - NLM STAT- MEDLINE DCOM- 20210518 LR - 20220531 IS - 1600-0765 (Electronic) IS - 0022-3484 (Linking) VI - 56 IP - 3 DP - 2021 Jun TI - A deficiency of Dec2 triggers periodontal inflammation and pyroptosis. PG - 492-500 LID - 10.1111/jre.12849 [doi] AB - BACKGROUND AND OBJECTIVES: Periodontal pathogens initiate various diseases and induce inflammatory host responses. The activation of inflammasomes triggers caspase-1 and interleukin (IL)-1beta-mediated pyroptosis via gasdermin D (GSDMD). Differentiated embryo chondrocyte 2 (Dec2) is a transcription repressor that controls the expression of genes involved in innate immune and inflammatory responses. However, the effects of Dec2 on inflammasome-induced pyroptosis in periodontal tissues remain elusive. This study aimed to characterize the activation of Dec2 inflammasomes that contribute to P. gingivalis lipopolysaccharide (LPS)-induced pyroptosis and its functional and regulatory importance in periodontal inflammation. MATERIALS AND METHODS: Human gingival fibroblasts (HGFs) and human periodontal ligament fibroblasts (HPDLFs) were stimulated with P. gingivalis LPS in vitro. An experimental periodontitis mouse model (wild-type (WT) and Dec2KO) was established to profile periodontal pyroptosis. RESULTS: The results demonstrate that P. gingivalis LPS activates caspase-1, caspase-11, and NF-kappaB in HGFs and in HPDLFs. siRNA knockdown of Dec2 stimulated the induction and further upregulated LPS-induced pyroptosis in HGFs and HPDLFs, resulting in the release of IL-1beta. Further, a deficiency of Dec2 alleviated periodontal pyroptosis via the transcriptional induction of GSDMD. In addition, P. gingivalis-induced IL-1beta expression and Dec2-deficient mice subsequently increased the inflammatory effect of P. gingivalis in HGFs and in HPDLFs, confirming the importance of Dec2 in the activation of inflammasomes and the regulation of pyroptosis. CONCLUSION: Our results demonstrate that Dec2 alleviates periodontal pyroptosis by regulating the expression of NF-kappaB, caspase-1 and GSDMD, suggesting that Dec2 is a crucial component of inflammasome activation and subsequent pyroptosis. CI - (c) 2021 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd. FAU - Oka, Shunichi AU - Oka S AD - Department of Anesthesiology, Nihon University School of Dentistry, Tokyo, Japan. AD - Division of Immunology and Pathology, Dental Research Center, Nihon University School of Dentistry, Tokyo, Japan. FAU - Li, Xiaoyan AU - Li X AD - Laboratory of Tissue Regeneration and Immunology and Department of Periodontics, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology, Beijing, China. FAU - Sato, Fuyuki AU - Sato F AD - Pathology Division, Shizuoka Cancer Center, Shizuoka, Japan. FAU - Zhang, Fengzhu AU - Zhang F AD - Department of Anesthesiology, Nihon University School of Dentistry at Matsudo, Chiba, Japan. FAU - Tewari, Nitesh AU - Tewari N AD - Division of Pedodontics and Preventive Dentistry, Centre for Dental Education and Research, All India Institute of Medical Sciences, New Delhi, India. FAU - Kim, Il-Shin AU - Kim IS AD - Department of Dental Hygiene, Honam University, Gwangju, Korea. FAU - Zhong, Liangjun AU - Zhong L AD - Department of Stomatology, Hangzhou Normal University, Hangzhou, China. FAU - Hamada, Nobushiro AU - Hamada N AD - Division of Microbiology, Department of Oral Science, Graduate School of Dentistry, Kanagawa Dental University, Yokosuka, Japan. FAU - Makishima, Makoto AU - Makishima M AD - Division of Biochemistry, Department of Biomedical Sciences, Nihon University School of Medicine, Tokyo, Japan. FAU - Liu, Yi AU - Liu Y AUID- ORCID: 0000-0002-4998-5547 AD - Laboratory of Tissue Regeneration and Immunology and Department of Periodontics, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology, Beijing, China. FAU - Bhawal, Ujjal K AU - Bhawal UK AUID- ORCID: 0000-0002-3746-009X AD - Department of Disaster Medicine and Dental Sociology, Kanagawa Dental University, Yokosuka, Japan. AD - Department of Biochemistry and Molecular Biology, Nihon University School of Dentistry at Matsudo, Chiba, Japan. LA - eng GR - Grants-in-Aid from the Ministry of Education, Culture, Sports, Science and Technology of Japan/ GR - Nihon University Multidisciplinary Research Grant for 2018/ PT - Journal Article DEP - 20210228 PL - United States TA - J Periodontal Res JT - Journal of periodontal research JID - 0055107 RN - 0 (Gsdmd protein, mouse) RN - 0 (Inflammasomes) RN - 0 (Interleukin-1beta) RN - 0 (Intracellular Signaling Peptides and Proteins) RN - 0 (Phosphate-Binding Proteins) RN - EC 3.4.22.36 (Caspase 1) SB - IM MH - Animals MH - Caspase 1 MH - Cells, Cultured MH - *Inflammasomes MH - Inflammation MH - Interleukin-1beta MH - Intracellular Signaling Peptides and Proteins MH - Mice MH - Phosphate-Binding Proteins MH - *Pyroptosis OTO - NOTNLM OT - P. gingivalis OT - Dec2 OT - Pyroptosis OT - periodontal inflammation EDAT- 2021/03/01 06:00 MHDA- 2021/05/19 06:00 CRDT- 2021/02/28 20:41 PHST- 2020/12/14 00:00 [revised] PHST- 2020/09/15 00:00 [received] PHST- 2020/12/30 00:00 [accepted] PHST- 2021/03/01 06:00 [pubmed] PHST- 2021/05/19 06:00 [medline] PHST- 2021/02/28 20:41 [entrez] AID - 10.1111/jre.12849 [doi] PST - ppublish SO - J Periodontal Res. 2021 Jun;56(3):492-500. doi: 10.1111/jre.12849. Epub 2021 Feb 28.