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Koga A, Thongsiri C, Kudo D, Phuong DND, Iwamoto Y, Fujii W, Nagai-Yoshioka Y, Yamasaki R, Ariyoshi W. Mechanisms Underlying the Suppression of IL-1β Expression by Magnesium Hydroxide Nanoparticles. Biomedicines 2023; 11:biomedicines11051291. [PMID: 37238962 DOI: 10.3390/biomedicines11051291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 04/24/2023] [Accepted: 04/25/2023] [Indexed: 05/28/2023] Open
Abstract
In recent years, magnesium hydroxide has been widely studied due to its bioactivity and biocompatibility. The bactericidal effects of magnesium hydroxide nanoparticles on oral bacteria have also been reported. Therefore, in this study, we investigated the biological effects of magnesium hydroxide nanoparticles on inflammatory responses induced by periodontopathic bacteria. Macrophage-like cells, namely J774.1 cells, were treated with LPS derived from Aggregatibacter actinomycetemcomitans and two different sizes of magnesium hydroxide nanoparticles (NM80/NM300) to evaluate their effects on the inflammatory response. Statistical analysis was performed using an unresponsive Student's t-test or one-way ANOVA followed by Tukey's post hoc test. NM80 and NM300 inhibited the expression and secretion of IL-1β induced by LPS. Furthermore, IL-1β inhibition by NM80 was dependent on the downregulation of PI3K/Akt-mediated NF-κB activation and the phosphorylation of MAPK molecules such as JNK, ERK1/2, and p38 MAPK. By contrast, only the deactivation of the ERK1/2-mediated signaling cascade is involved in IL-1β suppression by NM300. Although the molecular mechanism involved varied with size, these results suggest that magnesium hydroxide nanoparticles have an anti-inflammatory effect against the etiologic factors of periodontopathic bacteria. These properties of magnesium hydroxide nanoparticles can be applied to dental materials.
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Affiliation(s)
- Ayaka Koga
- Department of Health Sciences, Kyushu Dental University, Kitakyushu 803-8580, Fukuoka, Japan
- Division of Infections and Molecular Biology, Department of Health Promotion, Kyushu Dental University, Kitakyushu 803-8580, Fukuoka, Japan
| | - Chuencheewit Thongsiri
- Department of Conservative Dentistry and Prosthodontics, Srinakharinwirot University, Bangkok 10110, Thailand
| | - Daisuke Kudo
- SETOLAS Holdings Inc., Sakaide 762-0012, Kagawa, Japan
| | | | | | - Wataru Fujii
- Unit of Interdisciplinary Promotion, School of Oral Health Sciences, Faculty of Dentistry, Kyushu Dental University, Kitakyushu 803-8580, Fukuoka, Japan
| | - Yoshie Nagai-Yoshioka
- Division of Infections and Molecular Biology, Department of Health Promotion, Kyushu Dental University, Kitakyushu 803-8580, Fukuoka, Japan
| | - Ryota Yamasaki
- Division of Infections and Molecular Biology, Department of Health Promotion, Kyushu Dental University, Kitakyushu 803-8580, Fukuoka, Japan
| | - Wataru Ariyoshi
- Division of Infections and Molecular Biology, Department of Health Promotion, Kyushu Dental University, Kitakyushu 803-8580, Fukuoka, Japan
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Yamaguchi T, Yamamoto Y, Egashira K, Sato A, Kondo Y, Saiki S, Kimura M, Chikazawa T, Yamamoto Y, Ishigami A, Murakami S. Oxidative Stress Inhibits Endotoxin Tolerance and May Affect Periodontitis. J Dent Res 2023; 102:331-339. [PMID: 36529984 DOI: 10.1177/00220345221138523] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Periodontal disease is caused by dysbiosis of the dental biofilm and the host inflammatory response. Various pathogenic factors, such as proteases and lipopolysaccharides (LPSs) produced by bacteria, are involved in disease progression. Endotoxin tolerance is a function of myeloid cells, which sustain inflammation and promote tissue regeneration upon prolonged stimulation by endotoxins such as LPS. The role of endotoxin tolerance is gaining attention in various chronic inflammatory diseases, but its role in periodontal disease remains elusive. Oxidative stress, one of the major risk factors for periodontal disease, promotes disease progression through various mechanisms, of which only some are known. The effect of oxidative stress on endotoxin tolerance has not yet been studied, and we postulated that endotoxin tolerance regulation may be an additional mechanism through which oxidative stress influences periodontal disease. This study aimed to reveal the effect of oxidative stress on endotoxin tolerance and that of endotoxin tolerance on periodontitis progression. The effect of oxidative stress on endotoxin tolerance was analyzed in vitro using peritoneal macrophages of mice and hydrogen peroxide (H2O2). The results showed that oxidative stress inhibits endotoxin tolerance induced by Porphyromonas gingivalis LPS in macrophages, at least partially, by downregulating LPS-elicited negative regulators of Toll-like receptor (TLR) signaling. A novel oxidative stress mouse model was established using SMP30KO mice incapable of ascorbate biosynthesis. Using this model, we revealed that oxidative stress impairs endotoxin tolerance potential in macrophages in vivo. Furthermore, gingival expression of endotoxin tolerance-related genes and TLR signaling negative regulators was decreased, and symptoms of ligature-induced periodontitis were aggravated in the oxidative stress mouse model. Our findings suggest that oxidative stress may contribute to periodontitis progression through endotoxin tolerance inhibition.
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Affiliation(s)
- T Yamaguchi
- R&D Headquarters, LION Corporation, Tokyo, Japan.,Department of Periodontology, Osaka University Graduate School of Dentistry, Osaka, Japan
| | - Y Yamamoto
- R&D Headquarters, LION Corporation, Tokyo, Japan
| | - K Egashira
- R&D Headquarters, LION Corporation, Tokyo, Japan
| | - A Sato
- Molecular Regulation of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| | - Y Kondo
- Molecular Regulation of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan.,Faculty of Human Sciences, Waseda University, Tokyo, Japan
| | - S Saiki
- R&D Headquarters, LION Corporation, Tokyo, Japan
| | - M Kimura
- R&D Headquarters, LION Corporation, Tokyo, Japan
| | - T Chikazawa
- R&D Headquarters, LION Corporation, Tokyo, Japan
| | - Y Yamamoto
- R&D Headquarters, LION Corporation, Tokyo, Japan
| | - A Ishigami
- Molecular Regulation of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| | - S Murakami
- Department of Periodontology, Osaka University Graduate School of Dentistry, Osaka, Japan
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Zhang S, Paul S, Kundu P. NF-κB Regulation by Gut Microbiota Decides Homeostasis or Disease Outcome During Ageing. Front Cell Dev Biol 2022; 10:874940. [PMID: 35846362 PMCID: PMC9285657 DOI: 10.3389/fcell.2022.874940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Accepted: 06/13/2022] [Indexed: 11/15/2022] Open
Abstract
Human beings and their indigenous microbial communities have coexisted for centuries, which led to the development of co-evolutionary mechanisms of communication and cooperation. Such communication machineries are governed by sophisticated multi-step feedback loops, which typically begin with the recognition of microbes by pattern recognition receptors (PRRs), followed by a host transcriptional response leading to the release of effector molecules. Our gastrointestinal tract being the main platform for this interaction, a variety of host intestinal cells tightly regulate these loops to establish tolerance towards the microbial communities of the gut and maintain homeostasis. The transcription factor, nuclear factor kappa B (NF-κB) is an integral component of such a communication apparatus, which plays a critical role in determining the state of homeostasis or inflammation associated with dysbiosis in the host. Here we outline the crucial role of NF-κB in host response to microbial cues in the context of ageing and associated diseases.
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Affiliation(s)
- Shuning Zhang
- Laboratory for Microbiota-Host Interactions, The Center for Microbes, Development and Health, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Soumyajeet Paul
- Laboratory for Microbiota-Host Interactions, The Center for Microbes, Development and Health, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, China
| | - Parag Kundu
- Laboratory for Microbiota-Host Interactions, The Center for Microbes, Development and Health, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, China
- University of Chinese Academy of Sciences, Beijing, China
- *Correspondence: Parag Kundu,
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