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Kendlbacher FL, Bloch S, Hager-Mair FF, Schäffer C, Andrukhov O. Red-complex bacteria exhibit distinctly different interactions with human periodontal ligament stromal cells compared to Fusobacterium nucleatum. Arch Oral Biol 2024; 164:106004. [PMID: 38776586 DOI: 10.1016/j.archoralbio.2024.106004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Revised: 04/17/2024] [Accepted: 05/13/2024] [Indexed: 05/25/2024]
Abstract
OBJECTIVE The red-complex bacteria Porphyromonas gingivalis and Tannerella forsythia together with Fusobacterium nucleatum are essential players in periodontitis. This study investigated the bacterial interplay with human periodontal ligament mesenchymal stromal cells (hPDL-MSCs) which act in the acute phase of periodontal infection. DESIGN The capability of the bacteria to induce an inflammatory response as well as their viability, cellular adhesion and invasion were analyzed upon mono- and co-infections of hPDL-MSCs to delineate potential synergistic or antagonistic effects. The expression level and concentration of interleukin (IL)-6, IL-8 and monocyte chemoattractant protein (MCP)-1 were measured using qRT-PCR and ELISA. Viability, invasion, and adhesion were determined quantitatively using agar plate culture and qualitatively by confocal microscopy. RESULTS Viability of P. gingivalis and T. forsythia but not F. nucleatum was preserved in the presence of hPDL-MSCs, even in an oxygenated environment. F. nucleatum significantly increased the expression and concentration of IL-6, IL-8 and MCP-1 in hPDL-MSCs, while T. forsythia and P. gingivalis caused only a minimal inflammatory response. Co-infections in different combinations had no effect on the inflammatory response. Moreover, P. gingivalis mitigated the increase in cytokine levels elicited by F. nucleatum. Both red-complex bacteria adhered to and invaded hPDL-MSCs in greater numbers than F. nucleatum, with only a minor effect of co-infections. CONCLUSIONS Oral bacteria of different pathogenicity status interact differently with hPDL-MSCs. The data support P. gingivalis' capability to manipulate the inflammatory host response. Further research is necessary to obtain a comprehensive picture of the role of hPDL-MSCs in more complex oral biofilms.
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Affiliation(s)
- Fabian L Kendlbacher
- NanoGlycobiology Research Group, Institute of Biochemistry, Department of Chemistry, Universität für Bodenkultur Wien, Vienna, Austria
| | - Susanne Bloch
- NanoGlycobiology Research Group, Institute of Biochemistry, Department of Chemistry, Universität für Bodenkultur Wien, Vienna, Austria
| | - Fiona F Hager-Mair
- NanoGlycobiology Research Group, Institute of Biochemistry, Department of Chemistry, Universität für Bodenkultur Wien, Vienna, Austria
| | - Christina Schäffer
- NanoGlycobiology Research Group, Institute of Biochemistry, Department of Chemistry, Universität für Bodenkultur Wien, Vienna, Austria.
| | - Oleh Andrukhov
- Competence Center for Periodontal Research, University Clinic of Dentistry, Medical University of Vienna, A-1090 Vienna, Austria.
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Rangel-Coelho JP, Gogolla PV, Meyer MD, Simão LC, Costa BC, Casarin RCV, Santamaria MP, Teixeira LN, Peruzzo DC, Lisboa-Filho PN, Nociti-Jr FH, Kantovitz KR. Titanium dioxide nanotubes applied to conventional glass ionomer cement influence the expression of immunoinflammatory markers: An in vitro study. Heliyon 2024; 10:e30834. [PMID: 38784540 PMCID: PMC11112319 DOI: 10.1016/j.heliyon.2024.e30834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 04/03/2024] [Accepted: 05/06/2024] [Indexed: 05/25/2024] Open
Abstract
Objectives To assess the impact of different concentrations TiO2-nt incorporated into a glass ionomer cement on the proliferation, mitochondrial metabolism, morphology, and pro- and anti-inflammatory cytokine production of cultured fibroblasts (NIH/3T3), whether or not stimulated by lipopolysaccharides (LPS-2 μg/mL, 24 h). Methods TiO2-nt was added to KM (Ketac Molar EasyMix™, 3 %, 5 %, 7 % in weight); unblended KM was used as the control. The analyses included: Cell proliferation assay (n = 6; 24/48/72h); Mitochondrial metabolism assay (n = 6; 24/48/72h); Confocal laser microscopy (n = 3; 24/48/72h); Determination of biomarkers (IL-1β/IL-6/IL-10/VEGF/TNF) by using both multiplex technology (n = 6; 12/18 h) and the quantitative real-time PCR assay (q-PCR) (n = 3, 24/72/120 h). The data underwent analysis using both the Shapiro-Wilk and Levene tests, and by generalized linear models (α = 0.05). Results It demonstrated that cell proliferation increased over time, regardless of the presence of TiO2-nt or LPS, and displayed a significant increase at 72 h; mitochondrial metabolism increased (p < 0.05), irrespective of exposure to LPS (p = 0.937); no cell morphology changes were observed; TiO2-nt reverted the impact of KM on the secreted levels of the evaluated proteins and the gene expressions in the presence of LPS (p < 0.0001). Conclusions TiO2-nt did not adversely affect the biological behavior of fibroblastic cells cultured on GIC discs.
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Affiliation(s)
- João Pedro Rangel-Coelho
- Faculdade São Leopoldo Mandic (SLMANDIC), Rua José Rocha Junqueira 13, Swift, Campinas, SP, 13045-755, Brazil
| | - Pedro Viel Gogolla
- Faculdade São Leopoldo Mandic (SLMANDIC), Rua José Rocha Junqueira 13, Swift, Campinas, SP, 13045-755, Brazil
| | - Maria Davoli Meyer
- Faculdade São Leopoldo Mandic (SLMANDIC), Rua José Rocha Junqueira 13, Swift, Campinas, SP, 13045-755, Brazil
| | - Lucas Carvalho Simão
- Faculdade São Leopoldo Mandic (SLMANDIC), Rua José Rocha Junqueira 13, Swift, Campinas, SP, 13045-755, Brazil
| | - Bruna Carolina Costa
- Department of Physics, School of Science, State University Júlio de Mesquita (UNESP), Av. Engenheiro Luís Edmundo Carrijo Coube 2085, Bauru, SP, 17033-360, Brazil
| | - Renato Côrrea Viana Casarin
- Department of Prosthodontics and Periodontics, Division of Periodontics, Piracicaba Dental School, State University of Campinas (FOP-UNICAMP), Av. Limeira 901, Areião, Piracicaba, SP, 13414-903, Brazil
| | | | - Lucas Novaes Teixeira
- Faculdade São Leopoldo Mandic (SLMANDIC), Rua José Rocha Junqueira 13, Swift, Campinas, SP, 13045-755, Brazil
| | - Daiane Cristina Peruzzo
- Faculdade São Leopoldo Mandic (SLMANDIC), Rua José Rocha Junqueira 13, Swift, Campinas, SP, 13045-755, Brazil
| | - Paulo Noronha Lisboa-Filho
- Department of Physics, School of Science, State University Júlio de Mesquita (UNESP), Av. Engenheiro Luís Edmundo Carrijo Coube 2085, Bauru, SP, 17033-360, Brazil
| | - Francisco Humberto Nociti-Jr
- Faculdade São Leopoldo Mandic (SLMANDIC), Rua José Rocha Junqueira 13, Swift, Campinas, SP, 13045-755, Brazil
- American Dental Association Science and Research Institute - ADASRI, Cellular and Molecular Biology Research Group, Innovation and Technology Research, 100 Bureau Dr, Gaithersburg, MD, 20899, USA
| | - Kamila Rosamilia Kantovitz
- Faculdade São Leopoldo Mandic (SLMANDIC), Rua José Rocha Junqueira 13, Swift, Campinas, SP, 13045-755, Brazil
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Annunziata M, Arcadio F, Borriello A, Bencivenga D, Piccirillo A, Stampone E, Zeni L, Cennamo N, Della Ragione F, Guida L. A novel plasmonic optical-fiber-based point-of-care test for periodontal MIP-1α detection. iScience 2023; 26:108539. [PMID: 38089574 PMCID: PMC10711496 DOI: 10.1016/j.isci.2023.108539] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 07/19/2023] [Accepted: 11/20/2023] [Indexed: 04/23/2024] Open
Abstract
The analysis of salivary biomarkers as expression of periodontal health conditions has been proposed as a useful aid to conventional diagnostic approaches. In this study, we present a point-of-care test (POCT) exploiting a surface plasmon resonance (SPR)-based optical biosensor to detect salivary macrophage inflammatory protein (MIP)-1α, a promising marker of periodontitis. A plastic optical fiber (POF) was suitably modified and functionalized by an antibody self-assembled monolayer against MIP-1α for plasmonic detection. The proposed SPR-POF biosensor showed high selectivity and very low limit of detection for MIP-1α of 129 fM (1.0 pg/mL) in phosphate-buffered saline and 346 fM (2.7 pg/mL) in saliva. As a proof of concept, this POCT was also able to discriminate between a periodontitis patient and a healthy subject. The obtained results support the future application of this technology for an on-site detection and real-time monitoring of periodontal health conditions for diagnostic and therapeutic purposes.
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Affiliation(s)
- Marco Annunziata
- Multidisciplinary Department of Medical-Surgical and Dental Specialties, University of Campania Luigi Vanvitelli, Via L. De Crecchio, 6, 80138 Naples, Italy
| | - Francesco Arcadio
- Department of Engineering, University of Campania Luigi Vanvitelli, Via Roma 29, 81031 Aversa, Italy
| | - Adriana Borriello
- Department of Precision Medicine, University of Campania Luigi Vanvitelli, Via L. De Crecchio 7, 80138 Naples, Italy
| | - Debora Bencivenga
- Department of Precision Medicine, University of Campania Luigi Vanvitelli, Via L. De Crecchio 7, 80138 Naples, Italy
| | - Angelantonio Piccirillo
- Multidisciplinary Department of Medical-Surgical and Dental Specialties, University of Campania Luigi Vanvitelli, Via L. De Crecchio, 6, 80138 Naples, Italy
| | - Emanuela Stampone
- Department of Precision Medicine, University of Campania Luigi Vanvitelli, Via L. De Crecchio 7, 80138 Naples, Italy
| | - Luigi Zeni
- Department of Engineering, University of Campania Luigi Vanvitelli, Via Roma 29, 81031 Aversa, Italy
| | - Nunzio Cennamo
- Department of Engineering, University of Campania Luigi Vanvitelli, Via Roma 29, 81031 Aversa, Italy
| | - Fulvio Della Ragione
- Department of Precision Medicine, University of Campania Luigi Vanvitelli, Via L. De Crecchio 7, 80138 Naples, Italy
| | - Luigi Guida
- Multidisciplinary Department of Medical-Surgical and Dental Specialties, University of Campania Luigi Vanvitelli, Via L. De Crecchio, 6, 80138 Naples, Italy
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Serrano-Lopez R, Morandini AC. Fibroblasts at the curtain call: from ensemble to principal dancers in immunometabolism and inflammaging. J Appl Oral Sci 2023; 31:e20230050. [PMID: 37377310 PMCID: PMC10392869 DOI: 10.1590/1678-7757-2023-0050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Accepted: 05/08/2023] [Indexed: 06/29/2023] Open
Abstract
Inflammation is a necessary step in response to injuries, being vital in restoring homeostasis and facilitating tissue healing. Among the cells that play a crucial role in inflammatory responses, stromal cells, including fibroblasts, have an undeniable significance in fine-tuning the magnitude of mediators that directly affect hyper-inflammatory responses and tissue destruction. Fibroblasts, the dominant cells in the gingival connective tissue, are a very heterogeneous population of cells, and more recently they have been receiving well deserved attention as central players and often the 'principal dancers' of many pathological processes ranging from inflammation and fibrosis to altered immunity and cancer. The goal of the current investigation is to dive into the exact role of the stromal fibroblast and the responsible mechanistic factors involved in both regulation and dysregulation of the inflammatory responses. This article reviews the most recent literature on how fibroblasts, in their different activation states or subtypes, play a crucial role in contributing to inflammatory outcomes. We will focus on recent findings on inflammatory diseases. We will also provide connections regarding the stromal-immune relationship, which supports the idea of fibroblast coming out from the 'ensemble' of cell types to the protagonist role in immunometabolism and inflammaging. Additionally, we discuss the current advances in variation of fibroblast nomenclature and division into clusters with their own suggested function and particularities in gene expression. Here, we provide a perspective for the periodontal implications, discussing the fibroblast role in the infection-driven and inflammatory mediated diseases such as periodontitis.
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Affiliation(s)
- Rogelio Serrano-Lopez
- Augusta University, Dental College of Georgia, Department of Oral Biology and Diagnostic Sciences, Augusta, GA, USA
- Augusta University, Honors Program, College of Science and Mathematics, Augusta, GA, USA
| | - Ana Carolina Morandini
- Augusta University, Dental College of Georgia, Department of Oral Biology and Diagnostic Sciences, Augusta, GA, USA
- Augusta University, Dental College of Georgia, Department of Periodontics, Augusta, GA, USA
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Paladines N, Dawson S, Ryan W, Serrano-Lopez R, Messer R, Huo Y, Cutler CW, Ramos-Junior ES, Morandini AC. Metabolic reprogramming through mitochondrial biogenesis drives adenosine anti-inflammatory effects: new mechanism controlling gingival fibroblast hyper-inflammatory state. Front Immunol 2023; 14:1148216. [PMID: 37350964 PMCID: PMC10282177 DOI: 10.3389/fimmu.2023.1148216] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 05/25/2023] [Indexed: 06/24/2023] Open
Abstract
Introduction Fibroblasts are the dominant stromal cells in the gingival lamina propria with a well-established relevance in regulation of inflammation, and in innate immunity. This is exemplified by their hypersecretion of CXCL8, enhancing leukocyte infiltration in chronic and sustained inflammatory conditions. We have previously shown adenosine to be a key metabolic nucleoside that regulates stromal inflammation, but the underlying mechanisms linking adenosine to the metabolic status of fibroblasts and to the resultant inflammatory response are unclear. This study examined, by seahorse real-time cell metabolic analysis, the bioenergetics of the stromal fibroblast response to extracellular adenosine and IL-1β, focusing on CXCL8 secretion by primary human gingival fibroblasts (HGF). Methods Markers of the glycolytic pathway and mitochondrial biogenesis were tracked through immunoblot. Further, the influence of adenosine on mitochondrial accumulation was measured by uptake of MitoTracker Red fluorescent probe and assessment of the role of FCCP (a mitochondrial uncoupler) in CXCL8 secretion and mitochondrial accumulation. Results Our results show that the anti-inflammatory response of HGF to extracellular adenosine, typified by reduced CXCL8 secretion, is mediated by mitochondrial oxidative phosphorylation, reflected in higher oxygen consumption rate (OCR). In the presence of IL-1β, adenosine-treated cells induced higher ATP production, basal respiration and proton leak compared to IL-1β without adenosine. Surprisingly, adenosine had no additional effect on the IL-1β-induced higher glycolysis rate demonstrated by the extracellular acidification rate (ECAR). In addition, the higher OCR in adenosine-stimulated cells was not due to the mitochondrial fuel dependency or capacity, but due to an increase in mitochondrial biogenesis and accumulation in the cells with concomitant decrease in mitophagy-required p-PINK1 marker. We detected the accumulation of functional mitochondria with increased activation of the AMPK/SIRT1/PGC-1α pathway. The adenosine-induced uptake of MitoTracker was abrogated by PGC-1α inhibition with SR-12898. In addition, the adenosine effects on reduced CXCL8 were ablated by treatment with FCCP, a potent uncoupler of mitochondrial oxidative phosphorylation. Conclusion Our findings reveal a key role for mitochondrial bioenergetics in regulation of CXCL8-mediated inflammation by HGF through the adenosine/AMPK/SIRT1/PGC-1α axis. Therapeutically targeting this pathway in gingival fibroblasts might be a promising future strategy to modulate stromal-mediated sustained hyper-inflammatory responses.
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Affiliation(s)
- Nathalie Paladines
- Department of Oral Biology and Diagnostic Sciences, Dental College of Georgia, Augusta University, Augusta, GA, United States
| | - Shantiece Dawson
- Department of Oral Biology and Diagnostic Sciences, Dental College of Georgia, Augusta University, Augusta, GA, United States
| | - Weston Ryan
- Department of Oral Biology and Diagnostic Sciences, Dental College of Georgia, Augusta University, Augusta, GA, United States
| | - Rogelio Serrano-Lopez
- Department of Oral Biology and Diagnostic Sciences, Dental College of Georgia, Augusta University, Augusta, GA, United States
| | - Regina Messer
- Department of Oral Biology and Diagnostic Sciences, Dental College of Georgia, Augusta University, Augusta, GA, United States
| | - Yuqing Huo
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, United States
- Vascular Biology Center, Augusta University, Augusta, GA, United States
| | - Christopher W. Cutler
- Department of Periodontics, Dental College of Georgia, Augusta University, Augusta, GA, United States
| | - Erivan S. Ramos-Junior
- Department of Oral Biology and Diagnostic Sciences, Dental College of Georgia, Augusta University, Augusta, GA, United States
| | - Ana Carolina Morandini
- Department of Oral Biology and Diagnostic Sciences, Dental College of Georgia, Augusta University, Augusta, GA, United States
- Department of Periodontics, Dental College of Georgia, Augusta University, Augusta, GA, United States
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Zhang H, Huang J, Fan X, Miao R, Wang Y. HSP90AA1 promotes the inflammation in human gingival fibroblasts induced by Porphyromonas gingivalis lipopolysaccharide via regulating of autophagy. BMC Oral Health 2022; 22:366. [PMID: 36028869 PMCID: PMC9419417 DOI: 10.1186/s12903-022-02304-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Accepted: 06/28/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Peri-implantitis of tooth seriously affects the life quality of patients. This study aimed to investigate the role of HSP90AA1 in the inflammatory of human gingival fibroblasts (HGFs) induced by porphyromonas gingivalis lipopolysaccharide (Pg-LPS), and to provide a potential therapeutic target for clinical treatment of peri-implantitis. METHODS Pg-LPS (0.1, 1, 10 μg/mL) was used to construct the inflammatory model of HGFs to evaluate the effect of Pg-LPS on HGFs. Then HSP90AA1-siRNA was transfected to construct HSP90AA1 low expression HGFs cell line, and 3-MA was also added. After that, cell viability, apoptosis, the contents of inflammatory cytokines were detected by CCK-8, flow cytometry and ELISA assay, respectively. Intracellular ROS, the expressions of HSP90α, HSP90β were detected by immunofluorescence. The levels of HSP90AA1, p-NF-κB p65/NF-κB p65, LC3 II/I, ATG5, Beclin-1 and TLR protein were detected by western blot. RESULTS Pg-LPS treatment didn't affect the viability of HGFs cells, but induced the cell apoptosis and ROS generation, increased the contents of IL-1β, IL-6, TNF-α, and the protein expressions of HSP90AA1, p-NF-κBp65/NF-κBp65, LC3II/I, ATG5, and Beclin-1 in HGFs. While HSP90AA1-siRNA transfected into Pg-LPS induced HGFs significantly reduced the HSP90AA1, HSP90α, HSP90β expression, decreased the inflammatory factors, ROS generation, cell apoptosis rate, and autophagy-related proteins and TLR2/4 protein levels. What's more, the addition of autophagy inhibitor 3-MA further promote the effect of HSP90AA1-siRNA on Pg-LPS treated HGFs. CONCLUSIONS This study showed that HSP90AA1 promoted the inflammatory response of Pg-LPS induced HGFs by regulating autophagy. The addition of 3-MA further confirmed that autophagy may mediate siHSP90AA1 to enhance the inflammatory response.
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Affiliation(s)
- Huang Zhang
- Department of Stomatology, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, 310006, People's Republic of China, Zhejiang Province
| | - Jie Huang
- Department of Stomatology, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, 310006, People's Republic of China, Zhejiang Province
| | - XuSheng Fan
- Department of Stomatology, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, 310006, People's Republic of China, Zhejiang Province
| | - RuiJing Miao
- Department of Stomatology, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, 310006, People's Republic of China, Zhejiang Province
| | - YongWu Wang
- Department of Stomatology, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, 310006, People's Republic of China, Zhejiang Province.
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Combined Transcriptomic and Protein Array Cytokine Profiling of Human Stem Cells from Dental Apical Papilla Modulated by Oral Bacteria. Int J Mol Sci 2022; 23:ijms23095098. [PMID: 35563488 PMCID: PMC9103834 DOI: 10.3390/ijms23095098] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 04/22/2022] [Accepted: 04/30/2022] [Indexed: 11/18/2022] Open
Abstract
Stem cells from the apical papilla (SCAP) are a promising resource for use in regenerative endodontic treatment (RET) that may be adversely affected by oral bacteria, which in turn can exert an effect on the success of RET. Our work aims to study the cytokine profile of SCAP upon exposure to oral bacteria and their supernatants—Fusobacterium nucleatum and Enterococcus faecalis—as well as to establish their effect on the osteogenic and immunogenic potentials of SCAP. Further, we target the presence of key proteins of the Wnt/β-Catenin, TGF-β, and NF-κB signaling pathways, which play a crucial role in adult osteogenic differentiation of mesenchymal stem cells, using the Western blot (WB) technique. The membrane-based sandwich immunoassay and transcriptomic analysis showed that, under the influence of F. nucleatum (both bacteria and supernatant), the production of pro-inflammatory cytokines IL-6, IL-8, and MCP-1 occurred, which was also confirmed at the mRNA level. Conversely, E. faecalis reduced the secretion of the aforementioned cytokines at both mRNA and protein levels. WB analysis showed that SCAP co-cultivation with E. faecalis led to a decrease in the level of the key proteins of the Wnt/β-Catenin and NF-κB signaling pathways: β-Catenin (p = 0.0068 *), LRP-5 (p = 0.0059 **), and LRP-6 (p = 0.0329 *), as well as NF-kB (p = 0.0034 **) and TRAF6 (p = 0.0285 *). These results suggest that oral bacteria can up- and downregulate the immune and inflammatory responses of SCAP, as well as influence the osteogenic potential of SCAP, which may negatively regulate the success of RET.
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Makkar H, Atkuru S, Tang YL, Sethi T, Lim CT, Tan KS, Sriram G. Differential immune responses of 3D gingival and periodontal connective tissue equivalents to microbial colonization. J Tissue Eng 2022; 13:20417314221111650. [PMID: 35923175 PMCID: PMC9340411 DOI: 10.1177/20417314221111650] [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: 03/16/2022] [Accepted: 06/20/2022] [Indexed: 11/15/2022] Open
Abstract
Gingival and periodontal ligament fibroblasts are functionally distinct cell
types within the dento-gingival unit that participate in host immune response.
Their microenvironment influences the behavior and immune response to microbial
challenge. We developed three-dimensional gingival and periodontal connective
tissue equivalents (CTEs) using human fibrin-based matrix. The CTEs were
characterized, and the heterogeneity in their innate immune response was
investigated. The CTEs demonstrated no to minimal response to planktonic
Streptococcus mitis and Streptococcus
oralis, while their biofilms elicited a moderate increase in IL-6
and IL-8 production. In contrast, Fusobacterium nucleatum
provoked a substantial increase in IL-6 and IL-8 production. Interestingly, the
gingival CTEs secreted significantly higher IL-6, while periodontal counterparts
produced higher IL-8. In conclusion, the gingival and periodontal CTEs exhibited
differential responses to various bacterial challenges. This gives insights into
the contribution of tissue topography and fibroblast heterogeneity in rendering
protective and specific immune responses toward early biofilm colonizers.
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Affiliation(s)
- Hardik Makkar
- Faculty of Dentistry, National University of Singapore, Singapore
| | - Srividya Atkuru
- Faculty of Dentistry, National University of Singapore, Singapore
| | - Yi Ling Tang
- Faculty of Dentistry, National University of Singapore, Singapore
| | - Tanya Sethi
- Faculty of Dentistry, National University of Singapore, Singapore
| | - Chwee Teck Lim
- Institute for Health Innovation and Technology (iHealthtech), National University of Singapore, Singapore
| | - Kai Soo Tan
- Faculty of Dentistry, National University of Singapore, Singapore
| | - Gopu Sriram
- Faculty of Dentistry, National University of Singapore, Singapore
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Abraham D, Singh A, Kurian A, Gupta A, Aneja K, Sethi S. Correlation of endodontic infection and cytokine expression in patients with systemic diseases: A systematic review of clinical studies. ENDODONTOLOGY 2022. [DOI: 10.4103/endo.endo_13_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Lu J, Hu Y, Tang Z, Zhang C, Jin L, Gu M, Yang Y. Porphyromonas gingivalis lipopolysaccharide enhances the proliferation of human periodontal ligament cells via upregulation of cyclin D1, cyclin A and cyclin B1. Exp Ther Med 2021; 23:2. [PMID: 34815754 PMCID: PMC8593868 DOI: 10.3892/etm.2021.10925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Accepted: 09/23/2021] [Indexed: 11/06/2022] Open
Abstract
Human periodontal ligament cells (hPDLCs) play a notable role in periodontal tissue homeostasis and regeneration. However, the effect of Porphyromonas gingivalis lipopolysaccharide (Pg-LPS) on the proliferation of hPDLCs remains unclear. The present study investigated the effects of Pg-LPS on the proliferation profile of hPDLCs, and the involvement of cyclins and cyclin-dependent kinases in the process. hPDLCs were treated with Pg-LPS, and cell proliferation and cycle were detected using Cell Counting Kit-8 assays and flow cytometry. The mRNA expression levels of the cyclins and cyclin-dependent kinases (CDKs), including cyclins A, B1, D1 and D2 and CDK1, 2 and 4, were detected using reverse transcription-quantitative PCR. The protein expression levels of cyclins A, B1 and D1 were analysed using western blotting. The proliferation of hPDLCs was significantly increased after treatment with Pg-LPS at the concentrations of 0.001, 0.01, 0.1, 1 and 10 µg/ml for 24, 36 and 48 h compared with the cells cultured without LPS (P<0.01). The proliferation index of hPDLCs was significantly enhanced after treatment with Pg-LPS (0.0001, 0.001, 0.01, 0.1, 1 and 10 µg/ml) for 24 h (P<0.01). However, the S-phase fraction (SPF) only significantly increased after treatment with Pg-LPS at 0.01 µg/ml for 24 h (P<0.05), while the G2/M-phase fraction increased (P<0.01) and the G0/G1-phase fraction decreased (P<0.01) compared with the controls. The proliferation index and SPF increased, peaked at 24 h and then decreased at 48 h in both Pg-LPS-stimulated and control groups. Notably, Pg-LPS significantly upregulated the expression levels of cyclins D1, A and B1 after 24 h compared with those in the controls. Overall, the present study indicated that Pg-LPS may enhance the proliferation of hPDLCs, potentially through upregulation of cyclins D1, A and B1.
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Affiliation(s)
- Jiajing Lu
- Division of Paediatric Dentistry and Orthodontics, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR 999077, P.R. China.,Department of Orthodontics, School of Medical Technology, Taizhou Polytechnic College, Taizhou, Jiangsu 225300, P.R. China
| | - Yajing Hu
- Division of Paediatric Dentistry and Orthodontics, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR 999077, P.R. China.,Department of Cariology and Endodontology, Peking University School and Hospital of Stomatology and National Clinical Research Center for Oral Diseases and National Engineering Laboratory for Digital and Material Technology of Stomatology and Beijing Key Laboratory of Digital Stomatology, Beijing 100081, P.R. China
| | - Zhongyuan Tang
- Division of Paediatric Dentistry and Orthodontics, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR 999077, P.R. China
| | - Chengfei Zhang
- Division of Restorative Dental Sciences, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR 999077, P.R. China
| | - Lijian Jin
- Division of Periodontology and Implant Dentistry, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR 999077, P.R. China
| | - Min Gu
- Division of Paediatric Dentistry and Orthodontics, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR 999077, P.R. China
| | - Yanqi Yang
- Division of Paediatric Dentistry and Orthodontics, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR 999077, P.R. China
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11
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Zhang S, Liu Y, Wang X, An N, Ouyang X. STAT1/SOCS1/3 Are Involved in the Inflammation-Regulating Effect of GAS6/AXL in Periodontal Ligament Cells Induced by Porphyromonas gingivalis Lipopolysaccharide In Vitro. J Immunol Res 2021; 2021:9577695. [PMID: 34734092 PMCID: PMC8560282 DOI: 10.1155/2021/9577695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 10/05/2021] [Indexed: 11/17/2022] Open
Abstract
Periodontitis involves chronic inflammation of the tissues around the teeth caused by plaque and the corresponding immune response. Growth arrest-specific protein 6 (GAS6) and AXL receptor tyrosine kinase (AXL) are known to be involved in inflammatory diseases, while signal transducer and activator of transcription-1 (STAT1) and suppressor of cytokine signaling (SOCS) are related to inflammatory processes. Moreover, miRNA34a directly targets AXL to regulate the AXL expression. However, the specific roles of GAS6 and AXL in periodontitis remain unclear. This study was designed to explore the effect and mechanism of AXL on the expression of inflammatory cytokines induced by Porphyromonas gingivalis lipopolysaccharide (P. gingivalis LPS) in human periodontal ligament cells (hPDLCs). The effects of different concentrations of P. gingivalis LPS on the expression of GAS6/AXL in hPDLCs were observed. Additionally, the effect of LPS on AXL was investigated by transfection of the miRNA34a inhibitor. AXL was knocked down or overexpressed to observe the release of inflammatory cytokines interleukin- (IL-) 8 and IL-6. The results showed that the expression levels of GAS6 and AXL decreased after P. gingivalis LPS infection. Transfection of a miR-34a inhibitor to hPDLCs demonstrated a role of miR-34a in the downregulation of AXL expression induced by LPS. Moreover, AXL knockdown or overexpression influencing the expression of IL-8 and IL-6 was investigated under LPS stimulation. AXL knockdown decreased the expression of STAT1 and SOCS1/3. Overall, these results demonstrate that AXL inhibits the expression of LPS-induced inflammatory cytokines in hPDLCs and that STAT1 and SOCS1/3 are involved in the regulation of inflammation by GAS6/AXL.
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Affiliation(s)
- Shengnan Zhang
- Department of Periodontology, Peking University School and Hospital of Stomatology, Beijing 100081, China
| | - Yingjun Liu
- Department of General Dentistry II, Peking University School and Hospital of Stomatology, Beijing 100081, China
| | - Xuekui Wang
- Department of Periodontology, Peking University School and Hospital of Stomatology, Beijing 100081, China
| | - Na An
- Department of General Dentistry II, Peking University School and Hospital of Stomatology, Beijing 100081, China
| | - Xiangying Ouyang
- Department of Periodontology, Peking University School and Hospital of Stomatology, Beijing 100081, China
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12
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Nilsson BO. Mechanisms involved in regulation of periodontal ligament cell production of pro-inflammatory cytokines: Implications in periodontitis. J Periodontal Res 2020; 56:249-255. [PMID: 33305420 PMCID: PMC7984126 DOI: 10.1111/jre.12823] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 10/19/2020] [Accepted: 10/28/2020] [Indexed: 12/16/2022]
Abstract
It is well recognized that human periodontal ligament cells (PDL cells) may represent local immune cells of the periodontal tissues. However, it is unclear whether they represent “true” immune cells, since they can produce pro‐inflammatory cytokines not only after stimulation with bacterial lipopolysaccharides but also in response to other stimuli such as mechanical stress. Stimulation with bacterial lipopolysaccharides strongly enhances PDL cell production of pro‐inflammatory cytokines through activation of toll‐like receptors and NF‐κB signaling. Less information is available regarding putative modulators of cytokine production and their mechanisms of action in PDL cells. The anti‐inflammatory glucocorticoid dexamethasone reduces lipopolysaccharide‐induced PDL cell production of cytokines. Recent observations show that vitamin D and the antimicrobial peptide LL‐37 antagonize lipopolysaccharide‐stimulated PDL cell production of pro‐inflammatory cytokines. Secretory leukocyte protease inhibitor is endogenously expressed by PDL cells, and this protein negatively regulates PDL cell‐evoked cytokine production. More information and knowledge about the regulation of PDL cell production of cytokines may clarify the role of PDL cells in oral innate immunity and their importance in periodontitis.
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Affiliation(s)
- Bengt-Olof Nilsson
- Department of Experimental Medical Science, Lund University, Lund, Sweden
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13
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Modena KCDS, Calvo AM, Sipert CR, Colombini-Ishikiriama BL, Dionísio TJ, Navarro MFDL, Atta MT, Santos CF. Molecular Response of Pulp Fibroblasts after Stimulation with Pulp Capping Materials. Braz Dent J 2020; 31:244-251. [PMID: 32667520 DOI: 10.1590/0103-6440202003523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2010] [Accepted: 05/06/2020] [Indexed: 11/22/2022] Open
Abstract
This in vitro study evaluated cell viability and metabolism, nitric oxide release and production of two chemokines and one cytokine by cultured human dental pulp fibroblasts (HDPF) in contact with two glass ionomer cements (Ketac Molar-KM and Vitrebond-VB), Single Bond (SB) and calcium hydroxide (Dycal-DY). Cultures of HDPF were established by means of an explant technique. The specimens were prepared under sterile conditions and in disks measuring 5 mm x 2 mm obtained from a prefabricated mold and placed on a permeable membrane to avoid direct contact with the cells. Cytotoxicity was assessed by Trypan Blue exclusion method and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. Nitric oxide release in cell supernatant was detected by the Griess Method whereas stromal derived factor-1 alpha (SDF-1α or CXCL12), chemokine (C-X-C motif) ligand 8 [Interleukin 8 (IL-8 or CXCL8)] and interleukin-6 (IL-6) were detected by ELISA. RT-qPCR was employed for gene expression analysis. Statistical analyses were performed by One-way ANOVA followed by Tukey's post hoc test for materials independent of the time, and Two-way ANOVA followed by Bonferroni correction test for the comparisons between materials and experimental time (p<0.05). Cytotoxic tests showed significant differences only for DY. Protein levels and mRNA expression were significantly increased for IL-8 for both periods of time. IL-6 production increased when fibroblasts were stimulated by KM. SDF-1α protein production and mRNA expression were not affected by any of the materials. There was a decrease in nitrate/nitrite levels only for KM. Although DY caused intense cell death and did not stimulate the production of the inflammatory mediators evaluated in this work, it is known that this event seems to be fundamental for the process of repair of the pulp tissue and formation of mineralized barrier. KM and VB increased production of proteins related to the inflammatory process, thus favoring tissue repair. Therefore, although these glass ionomer cements did not lead to large cell death, they should be used with caution.
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Affiliation(s)
- Karin Cristina da Silva Modena
- Department of Restorative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, Universidade de São Paulo, Bauru, SP, Brazil
| | - Adriana Maria Calvo
- Department of Biological Sciences, Bauru School of Dentistry, Universidade de São Paulo, Bauru, SP, Brazil
| | - Carla Renata Sipert
- Department of Restorative Dentistry, School of Dentistry, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Bella Luna Colombini-Ishikiriama
- Department of Pediatric Dentistry, Orthodontics and Public Health, School of Dentistry, Bauru School of Dentistry, Universidade de São Paulo, Bauru, SP, Brazil
| | - Thiago José Dionísio
- Department of Biological Sciences, Bauru School of Dentistry, Universidade de São Paulo, Bauru, SP, Brazil
| | - Maria Fidela de Lima Navarro
- Department of Restorative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, Universidade de São Paulo, Bauru, SP, Brazil
| | - Maria Teresa Atta
- Department of Restorative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, Universidade de São Paulo, Bauru, SP, Brazil
| | - Carlos Ferreira Santos
- Department of Biological Sciences, Bauru School of Dentistry, Universidade de São Paulo, Bauru, SP, Brazil
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Lipopolysaccharide inhibits osteogenic differentiation of periodontal ligament stem cells partially through toll-like receptor 4-mediated ephrinB2 downregulation. Clin Oral Investig 2020; 24:3407-3416. [DOI: 10.1007/s00784-020-03211-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Accepted: 01/09/2020] [Indexed: 01/24/2023]
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15
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Choi GE, Hyun KY. Inhibitory effect of Acer tegmentosum maxim extracts on P. gingivalis LPS-induced periodontitis. Arch Oral Biol 2020; 109:104529. [DOI: 10.1016/j.archoralbio.2019.104529] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Revised: 08/12/2019] [Accepted: 08/18/2019] [Indexed: 02/03/2023]
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16
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Matos FDS, do Prado RF, Khoury RD, de Oliveira LD, Valera MC, Tomson PL, Carvalho CAT. Anti-inflammatory and anti-resorptive efficacy of adrenergic blockers on late replanted rat incisors. Dent Traumatol 2019; 36:253-263. [PMID: 31647601 DOI: 10.1111/edt.12523] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 10/22/2019] [Accepted: 10/23/2019] [Indexed: 12/21/2022]
Abstract
BACKGROUND/AIM In addition to their anti-inflammatory and anti-osteoclastogenesis properties, adrenergic blockers may also have promising anti-resorptive effects that can prevent root resorption when teeth are replanted because of avulsion. The aim of this study was to investigate the effects of phentolamine (Ph) and propranolol (Pr) in gels on the repair process of late replanted rat incisors. A further aim was to evaluate the biocompatibility of both drugs to human periodontal ligament fibroblasts (HPDLFs). MATERIALS AND METHODS Forty-eight maxillary right incisors were extracted from male Wistar rats, stored in paper napkins for 60 minutes, and randomly allocated to one of eight groups (n = 6). The root canal, root surface, and alveolus were treated with 0.75 µg/mL Ph gel (Ph0.75), 10 µg/mL Ph gel (Ph10), 100 µg/mL Ph gel (Ph100), 2.5 µg/mL Pr gel (Pr2.5), 10 µg/mL Pr gel (Pr10), 100 µg/mL Pr gel (Pr100), or sodium carboxymethylcellulose gel (CMC) before replantation. In the control group (CH), only the root canal was treated with calcium hydroxide paste. Thirty days following surgery, the animals were euthanized, and the right hemimaxilla was removed to perform micro-CT and histomorphometric analysis to determine osteoclastic activity. Ethanolic solutions of Ph10 and Pr10 were selected based on the in vivo study, and the viability of HPDLFs stimulated with lipopolysaccharide was determined by MTT assays. RESULTS The micro-CT and histomorphometric analysis revealed no significant differences among the treatments (P > .05). The presence of active osteoclasts was significantly decreased in the Ph10 and Pr10 groups (P < .05). Ph10 and Pr10 produced statistically similar cell survival rates compared to the control group (P > .05). CONCLUSIONS Ph10 and Pr10 significantly decreased osteoclastogenesis in delayed replanted rat teeth and were not cytotoxic toward HPDLFs.
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Affiliation(s)
- Felipe de Souza Matos
- Department of Restorative Dentistry, Endodontic Division, Institute of Science and Technology, São Paulo State University (Unesp), São José dos Campos, Brazil
| | - Renata Falchete do Prado
- Department of Restorative Dentistry, Endodontic Division, Institute of Science and Technology, São Paulo State University (Unesp), São José dos Campos, Brazil
| | - Rayana Duarte Khoury
- Department of Restorative Dentistry, Endodontic Division, Institute of Science and Technology, São Paulo State University (Unesp), São José dos Campos, Brazil
| | - Luciane Dias de Oliveira
- Department of Biosciences and Oral Diagnosis, Institute of Science and Technology, São Paulo State University (Unesp), São José dos Campos, Brazil
| | - Marcia Carneiro Valera
- Department of Restorative Dentistry, Endodontic Division, Institute of Science and Technology, São Paulo State University (Unesp), São José dos Campos, Brazil
| | - Phillip Leo Tomson
- Department of Oral Biology, Institute of Clinical Sciences, The University of Birmingham School of Dentistry, Birmingham, UK
| | - Cláudio Antonio Talge Carvalho
- Department of Restorative Dentistry, Endodontic Division, Institute of Science and Technology, São Paulo State University (Unesp), São José dos Campos, Brazil
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17
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Fusobacterium nucleatum Facilitates Apoptosis, ROS Generation, and Inflammatory Cytokine Production by Activating AKT/MAPK and NF- κB Signaling Pathways in Human Gingival Fibroblasts. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:1681972. [PMID: 31737164 PMCID: PMC6815639 DOI: 10.1155/2019/1681972] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Revised: 05/24/2019] [Accepted: 06/02/2019] [Indexed: 12/20/2022]
Abstract
Fusobacterium nucleatum (F. nucleatum) plays key roles in the initiation and progression of periodontitis. However, the pathogenic effect of F. nucleatum on human oral tissues and cells has not been fully evaluated. In this study, we aimed to analyze the pathogenic effects of F. nucleatum on human gingival fibroblasts (GFs) and clarify the potential mechanisms. RNA-sequencing analysis confirmed that F. nucleatum significantly altered the gene expression of GF as the stimulation time increased. Cell counting and EdU-labeling assays indicated that F. nucleatum inhibited GF proliferation and promoted cell apoptosis in a time- and dose-dependent manner. In addition, cell apoptosis, intracellular reactive oxygen species (ROS) generation, and proinflammatory cytokine production were dramatically elevated after F. nucleatum stimulation. Furthermore, we found that the AKT/MAPK and NF-κB signaling pathways were significantly activated by F. nucleatum infection and that a large number of genes related to cellular proliferation, apoptosis, ROS, and inflammatory cytokine production downstream of AKT/MAPK and NF-κB signaling pathways were significantly altered in F. nucleatum-stimulated GFs. These findings suggest that F. nucleatum inhibits GF proliferation and promotes cell apoptosis, ROS generation, and inflammatory cytokine production partly by activating the AKT/MAPK and NF-κB signaling pathways. Our study opens a new window for understanding the pathogenic effects of periodontal pathogens on the host oral system.
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18
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The role of bone cells in immune regulation during the course of infection. Semin Immunopathol 2019; 41:619-626. [PMID: 31552472 DOI: 10.1007/s00281-019-00755-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Accepted: 09/05/2019] [Indexed: 12/18/2022]
Abstract
Bone homeostasis depends on a balance between osteoclastic bone resorption and osteoblastic bone formation. Bone cells are regulated by a variety of biochemical factors, such as hormones and cytokines, as well as various types of physical stress. The immune system affects bone, since such factors are dysregulated under pathologic conditions, including infection. The bone marrow, one of the primary lymphoid organs, provides a special microenvironment that supports the function and differentiation of immune cells and hematopoietic stem cells (HSCs). Thus, bone cells contribute to immune regulation by modulating immune cell differentiation and/or function through the maintenance of the bone marrow microenvironment. Although osteoblasts were first reported as the population that supports HSCs, the role of osteoblast-lineage cells in hematopoiesis has been shown to be more limited than previously expected. Osteoblasts are specifically involved in the differentiation of lymphoid cells under physiological and pathological conditions. It is of critical importance how bone cells are modified during inflammation and/or infection and how such modification affects the immune system.
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19
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Ramos-Junior ES, Pedram M, Lee RE, Exstrom D, Yilmaz Ö, Coutinho-Silva R, Ojcius DM, Morandini AC. CD73-dependent adenosine dampens interleukin-1β-induced CXCL8 production in gingival fibroblasts: Association with heme oxygenase-1 and adenosine monophosphate-activated protein kinase. J Periodontol 2019; 91:253-262. [PMID: 31347162 DOI: 10.1002/jper.19-0137] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2019] [Revised: 04/30/2019] [Accepted: 05/20/2019] [Indexed: 12/17/2022]
Abstract
BACKGROUND During inflammation, stressed or infected cells can release adenosine triphosphate (ATP) to the extracellular medium, which can be hydrolyzed to adenosine by ectonucleotidases such as ectonucleoside triphosphate diphosphohydrolase 1 (CD39) and 5'-nucleotidase (CD73). The role of CD73 in the modulation of cytokine release by human gingival fibroblasts (HGFs) remains underexplored. Here, we investigated whether CD73-mediated hydrolysis of extracellular ATP (eATP) could affect interleukin (IL)-1β-induced CXCL8 secretion. METHODS The levels of mRNA expression of adenosine receptors, CD39 and CD73 of periodontitis samples were retrieved from a public database. Moreover, HGF mRNA levels were measured by quantitative reverse transcription-polymerase chain reaction (RT-qPCR) after 3, 6, or 24 hours of IL-1β stimulation. IL-1β-induced CXCL8 protein levels were measured after pretreatment with 100-µM eATP in the presence or absence of CD73 inhibitor. The effect of eATP degradation to adenosine on CXCL8 levels was investigated using agonist and antagonist of adenosine receptors. RESULTS Levels of CD39, CD73, and adenosine receptor mRNA were differentially modulated by IL-1β. ATP pretreatment impaired IL-1β-induced CXCL8 secretion and required activation of heme oxygenase-1 (HO-1) and phosphorylated adenosine monophosphate-activated protein kinase (pAMPK). The inhibition of CD73 or the inhibition of adenosine receptors abrogated the ATP effect on CXCL8 secretion. CONCLUSIONS CD73-generated adenosine dampens IL-1β-induced CXCL8 in HGFs and involves HO-1 and pAMPK signaling. These results imply that CD73 is a negative regulator of the inflammatory microenvironment, suggesting that this ectoenzyme could be involved in the generation of deficient CXCL8 gradient in chronic inflammation.
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Affiliation(s)
- Erivan Schnaider Ramos-Junior
- Department of Biomedical Sciences, Arthur A. Dugoni School of Dentistry, University of the Pacific, San Francisco, CA, USA
| | - Michael Pedram
- Doctor of Dental Surgery Program, Arthur A. Dugoni School of Dentistry, University of the Pacific, San Francisco, CA, USA
| | - Renee E Lee
- Department of Biomedical Sciences, Arthur A. Dugoni School of Dentistry, University of the Pacific, San Francisco, CA, USA.,College of Letters & Sciences, University of California, Berkeley, CA, USA
| | - Drake Exstrom
- Doctor of Dental Surgery Program, Arthur A. Dugoni School of Dentistry, University of the Pacific, San Francisco, CA, USA
| | - Özlem Yilmaz
- Department of Oral Health Sciences and Department of Microbiology and Immunology, Medical University of South Carolina, Charleston, SC, USA
| | - Robson Coutinho-Silva
- Immunobiology Program, Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - David M Ojcius
- Department of Biomedical Sciences, Arthur A. Dugoni School of Dentistry, University of the Pacific, San Francisco, CA, USA
| | - Ana Carolina Morandini
- Department of Biomedical Sciences, Arthur A. Dugoni School of Dentistry, University of the Pacific, San Francisco, CA, USA
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20
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Ferreira L, Peng HH, Cox DP, Chambers DW, Bhula A, Young JD, Ojcius DM, Ramos-Junior ES, Morandini AC. Investigation of foreign materials in gingival lesions: a clinicopathologic, energy-dispersive microanalysis of the lesions and in vitro confirmation of pro-inflammatory effects of the foreign materials. Oral Surg Oral Med Oral Pathol Oral Radiol 2019; 128:250-267. [PMID: 31300373 DOI: 10.1016/j.oooo.2019.04.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 02/26/2019] [Accepted: 04/13/2019] [Indexed: 11/30/2022]
Abstract
OBJECTIVES This study aimed to evaluate the clinical and histopathologic features of gingival lesions containing foreign material (GLFMs). In parallel, the composition of the foreign material and its effects in primary human gingival fibroblasts (HGFs) were investigated. STUDY DESIGN Eighty-six GLFMs were retrieved from an oral pathology biopsy service. Clinical and microscopic data were analyzed, and the composition of the particles was identified by using energy-dispersive X-ray spectroscopy (EDX). Furthermore, HGFs were stimulated with silica (SiO2) microparticles to investigate the production of collagen type 1 (COL-1), matrix metalloproteinase 2 (MMP2), and inflammatory cytokines. RESULTS GLFMs were most commonly found in women (60.5%) and most frequently described as white plaques. Histopathologic examination identified verrucous hyperplasia in 59% and epithelial dysplasia in 28% of the cases. EDX microanalysis revealed that Si (94%) was the most frequently detected foreign element. SiO2 microparticles induced higher COL-1 expression; higher levels of proinflammatory cytokines, such as interleukin-6 (IL-6), IL-8, and transforming growth factor-β, and increased MMP-2 activity in HGFs. CONCLUSIONS There was a strong association between the presence of foreign material in the gingiva and white verrucous clinical lesions. In addition, the most common element in the foreign material was Si, and our in vitro findings demonstrate the importance of silica-mediated effects on gingival fibroblasts.
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Affiliation(s)
- Leticia Ferreira
- Department of Diagnostic Sciences, University of Pacific Arthur A. Dugoni School of Dentistry, San Francisco, CA, USA.
| | - Hsin-Hsin Peng
- Center for Molecular and Clinical Immunology, Chang Gung University, Taiwan; Laboratory Animal Center, Chang Gung Memorial Hospital, Taiwan
| | - Darren P Cox
- Department of Diagnostic Sciences, University of Pacific Arthur A. Dugoni School of Dentistry, San Francisco, CA, USA
| | - David W Chambers
- Department of Orthodontics, University of Pacific Arthur A. Dugoni School of Dentistry, San Francisco, CA, USA
| | - Avni Bhula
- International Dental Studies Program, University of Pacific Arthur A. Dugoni School of Dentistry, San Francisco, CA, USA; Department of Oral and Maxillofacial Radiology, University of California, Los Angeles, CA, USA
| | - John D Young
- Center for Molecular and Clinical Immunology, Chang Gung University, Taiwan; Laboratory of Cellular Physiology and Immunology, The Rockefeller University, New York, NY, USA
| | - David M Ojcius
- Department of Biomedical Sciences, University of Pacific Arthur A. Dugoni School of Dentistry, San Francisco, CA, USA
| | - Erivan S Ramos-Junior
- Department of Biomedical Sciences, University of Pacific Arthur A. Dugoni School of Dentistry, San Francisco, CA, USA
| | - Ana Carolina Morandini
- Department of Biomedical Sciences, University of Pacific Arthur A. Dugoni School of Dentistry, San Francisco, CA, USA
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21
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Huang J, Xiong T, Zhang Z, Tan Y, Guo L. Inhibition of the receptor for advanced glycation inhibits lipopolysaccharide-mediated High mobility group protein B1 and Interleukin-6 synthesis in human gingival fibroblasts through the NF-κB signaling pathway. Arch Oral Biol 2019; 105:81-87. [PMID: 31288145 DOI: 10.1016/j.archoralbio.2019.06.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Revised: 06/04/2019] [Accepted: 06/24/2019] [Indexed: 12/17/2022]
Abstract
AIMS We investigated the effect of a specific inhibitor of the receptor for advanced glycation (FPS-ZM1) against lipopolysaccharide (LPS)-induced increase in expressions of high mobility group protein B1 (HMGB1) and interleukin-6 (IL-6) in human gingival fibroblasts (HGFs). Furthermore, we explored the potential molecular mechanisms and assessed the involvement of the NF-κB pathway in mediating the changes in the expressions of HMGB1 and IL-6 expression in response to LPS and FPS-ZM1. METHODS HGFs were cultured with enzymatic digestion-tissue explants method. The proliferation of LPS-stimulated HGFs pretreated with FPS-ZM1 at 24, 48, and 72 h was determined by cell counting kit 8 assay. The expressions of HMGB1 and IL-6 were measured using quantitative polymerase chain reaction and enzyme-linked immunosorbent assay. Western blot analysis was used to assess the expressions of receptor for advanced glycation end products (RAGE) and NF-κB. RESULTS LPS enhanced the protein expression of RAGE in HGFs. At the same time, LPS stimulated mRNA and protein expressions of HMGB1 and IL-6 in HGFs. However, pretreatment with FPS-ZM1 attenuated these effects. Pretreatment with FPS-ZM1 (250, 500 nM) significantly inhibited the LPS-induced NF-κB activity. CONCLUSION FPS-ZM1 down-regulated the LPS-induced HMGB1 and IL-6 expression in HGFs through blocking NF-κB activation. FPS-ZM1 is a promising therapeutic agent for inflammatory diseases caused by oral bacteria.
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Affiliation(s)
- Jialin Huang
- Department of prosthodontics, Hospital of Stomatology Affiliated to Southwest Medical University, LuZhou, SiChuan, China.
| | - Ting Xiong
- Department of prosthodontics, Hospital of Stomatology Affiliated to Southwest Medical University, LuZhou, SiChuan, China.
| | - Zhenzhen Zhang
- Department of prosthodontics, Hospital of Stomatology Affiliated to Southwest Medical University, LuZhou, SiChuan, China.
| | - Yujie Tan
- Department of prosthodontics, Hospital of Stomatology Affiliated to Southwest Medical University, LuZhou, SiChuan, China.
| | - Ling Guo
- Department of prosthodontics, Hospital of Stomatology Affiliated to Southwest Medical University, LuZhou, SiChuan, China.
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22
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Kusuyama J, Nakamura T, Ohnishi T, Albertson BG, Ebe Y, Eiraku N, Noguchi K, Matsuguchi T. Low‐intensity pulsed ultrasound promotes bone morphogenic protein 9‐induced osteogenesis and suppresses inhibitory effects of inflammatory cytokines on cellular responses via Rho‐associated kinase 1 in human periodontal ligament fibroblasts. J Cell Biochem 2019; 120:14657-14669. [DOI: 10.1002/jcb.28727] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 01/14/2019] [Accepted: 01/25/2019] [Indexed: 12/16/2022]
Affiliation(s)
- Joji Kusuyama
- Department of Oral Biochemistry, Field of Developmental Medicine Kagoshima University Graduate School of Medical and Dental Sciences Kagoshima Japan
- Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Department of Medicine Harvard Medical School Boston Massachusetts
| | - Toshiaki Nakamura
- Department of Periodontology, Field of Oral and Maxillofacial Rehabilitation Kagoshima University Graduate School of Medical and Dental Sciences Kagoshima Japan
| | - Tomokazu Ohnishi
- Department of Oral Biochemistry, Field of Developmental Medicine Kagoshima University Graduate School of Medical and Dental Sciences Kagoshima Japan
| | - Brent G. Albertson
- Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Department of Medicine Harvard Medical School Boston Massachusetts
| | - Yukari Ebe
- Department of Periodontology, Field of Oral and Maxillofacial Rehabilitation Kagoshima University Graduate School of Medical and Dental Sciences Kagoshima Japan
- Division of Clinical Engineering, Department of Dental Hygiene Kagoshima University Hospital Kagoshima Japan
| | - Nahoko Eiraku
- Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Department of Medicine Harvard Medical School Boston Massachusetts
- Department of Periodontology, Field of Oral and Maxillofacial Rehabilitation Kagoshima University Graduate School of Medical and Dental Sciences Kagoshima Japan
| | - Kazuyuki Noguchi
- Department of Periodontology, Field of Oral and Maxillofacial Rehabilitation Kagoshima University Graduate School of Medical and Dental Sciences Kagoshima Japan
| | - Tetsuya Matsuguchi
- Department of Oral Biochemistry, Field of Developmental Medicine Kagoshima University Graduate School of Medical and Dental Sciences Kagoshima Japan
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23
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Modena KCDS, Calvo AM, Sipert CR, Dionísio TJ, Navarro MFDL, Atta MT, Santos CF. Dental Pulp Fibroblasts Response after Stimulation with HEMA and Adhesive System. Braz Dent J 2018; 29:419-426. [PMID: 30517439 DOI: 10.1590/0103-6440201802558] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2018] [Accepted: 10/29/2018] [Indexed: 11/22/2022] Open
Abstract
This study evaluated in vitro cell viability and metabolism, nitric oxide release and production of chemokines by cultured human dental pulp fibroblasts (DPF) under contact with HEMA and Single Bond. Cultures of DPF were established by means of an explant technique. Once plated, cells were kept under contact with increasing concentrations of HEMA (10, 100 and 1000 nM) or Single Bond (SB) [10-fold serially diluted in culture medium (10-4, 10-3 and 10-2 v/v)] and also with polymerized SB components. Cytotoxicity was assessed by Trypan Blue exclusion method and MTT [3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide] assay. Nitric oxide release on cell supernatant was detected by Griess Method whereas chemokines (CXCL12 and CXCL8) were detected by ELISA. RT-qPCR was employed for chemokines gene expression analysis. Cytotoxic tests showed significant differences for SB 10-2. None of the tested materials significantly altered NO levels. Protein levels of CXCL12 were significantly decreased only by HEMA. On the other hand, while CXCL12 mRNA remained unaltered, gene expression of CXCL8 had significant decrease with all materials, except for polymerized SB. In conclusion, Single Bond and HEMA at various concentrations, decreased expression and production of molecules involved in inflammatory processes and, therefore, the use of adhesive systems such as pulp capping materials must be viewed with caution due to its large cytotoxic effect when in close contact with the pulp.
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Affiliation(s)
- Karin Cristina da Silva Modena
- Department of Restorative Dentistry, Endodontics and Dental Materials, USP - Universidade de São Paulo, Bauru, São Paulo, Brazil
| | - Adriana Maria Calvo
- Department of Biological Sciences, Bauru School of Dentistry, USP - Universidade de São Paulo, Bauru, São Paulo, Brazil
| | - Carla Renata Sipert
- Department of Restorative Dentistry, School of Dentistry, USP - Universidade de São Paulo, Bauru, São Paulo, Brazil
| | - Thiago José Dionísio
- Department of Biological Sciences, Bauru School of Dentistry, USP - Universidade de São Paulo, Bauru, São Paulo, Brazil
| | - Maria Fidela de Lima Navarro
- Department of Restorative Dentistry, Endodontics and Dental Materials, USP - Universidade de São Paulo, Bauru, São Paulo, Brazil
| | - Maria Teresa Atta
- Department of Restorative Dentistry, Endodontics and Dental Materials, USP - Universidade de São Paulo, Bauru, São Paulo, Brazil
| | - Carlos Ferreira Santos
- Department of Biological Sciences, Bauru School of Dentistry, USP - Universidade de São Paulo, Bauru, São Paulo, Brazil
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Braga Diniz JM, Espaladori MC, Souza E Silva ME, Brito LCN, Vieira LQ, Ribeiro Sobrinho AP. Immunological profile of teeth with inflammatory periapical disease from chronic liver disease patients. Int Endod J 2018; 52:149-157. [PMID: 30091243 DOI: 10.1111/iej.12992] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Accepted: 08/05/2018] [Indexed: 12/15/2022]
Abstract
AIM To evaluate the mRNA expression levels of the cytokines interferon-γ, tumour necrosis factor-α, interleukin (IL)-1β, IL-10, IL-6, VEGF, and AGT and the chemokine CCL2/MCP-1 in periapical interstitial fluid associated with root canal infections before and after the reduction of the bacterial load using a cleaning procedure. METHODOLOGY The case group included 11 patients with chronic liver disease, and the control group included 11 healthy patients. Clinical samples were taken from teeth with pulp necrosis. After cleaning and drying the canal, three paper points were introduced into the root canal and passed through the root apex (2 mm) into the periapical tissues for 1 min. The samples were collected immediately after root canal cleaning and 7 days later to characterize those gene expression levels using real-time PCR. The data were subjected to the Shapiro-Wilk and the Wilcoxon tests. RESULTS In the control group, significantly increased expression of the pro-inflammatory cytokines IFN-γ and TNF-α was observed in teeth with restrained bacterial loads (day 7) (P < 0.05). Similarly, increased TNF-α expression was found on day 7 in the liver group (P < 0.05). No differences were observed in the expression levels of the IL-1β, IL-10 and, IL-6, MCP-1/CCL-2 and VEGF between the first collection (day 0) and second collection (day 7), over time in either group. CONCLUSION Chronic liver disease patients exhibited sufficient immunologic ability showing relatively similar expression levels of cytokines, chemokines and angiogenic factors in periapical samples compared with the responses from no-chronic liver disease patients. The outcomes of this study suggest that liver impairment did not compromise the periapical immune response.
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Affiliation(s)
- J M Braga Diniz
- Department of Operative Dentistry, School of Dentistry, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - M C Espaladori
- Department of Operative Dentistry, School of Dentistry, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - M E Souza E Silva
- Department of Operative Dentistry, School of Dentistry, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - L C N Brito
- Faculty of Dentistry, University of Itaúna, Itaúna, Brazil
| | - L Q Vieira
- Department of Biochemistry and Immunology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - A P Ribeiro Sobrinho
- Department of Operative Dentistry, School of Dentistry, Federal University of Minas Gerais, Belo Horizonte, Brazil
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Abidi AH, Presley CS, Dabbous M, Tipton DA, Mustafa SM, Moore BM. Anti-inflammatory activity of cannabinoid receptor 2 ligands in primary hPDL fibroblasts. Arch Oral Biol 2017; 87:79-85. [PMID: 29274621 DOI: 10.1016/j.archoralbio.2017.12.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Revised: 12/01/2017] [Accepted: 12/04/2017] [Indexed: 01/29/2023]
Abstract
OBJECTIVES Approximately 65 million adults in the US have periodontitis, causing tooth loss and decreased quality of life. Cannabinoids modulate immune responses, and endocannabinoids are prevalent during oral cavity inflammation. Targets for intervention in periodontal inflammation are cannabinoid type 1 and 2 receptors (CB1R, CB2R), particularly CB2R because its levels increase during inflammation. We previously demonstrated that SMM-189 (CB2R inverse agonist) decreased pro-inflammatory cytokine production in primary microglial cells. The hypothesis of this study was that cannabinoids anandamide (AEA), HU-308 (CB2R selective agonist), and SMM-189 decrease pro-inflammatory IL-6 and MCP-1 production by primary human periodontal ligament fibroblasts (hPDLFs) stimulated with P. gingivalis LPS, TNF-α, or IL-1β. DESIGN Cytotoxic effects of cannabinoid compounds (10-4-10-6.5 M), LPS (1-1000 ng/ml), TNFα (10 ng/ml) and IL-1β (1 ng/ml) were assessed by measuring effects on cellular dehydrogenase activity. IL-6 and MCP-1 production were measured using Mesoscale Discovery (MSD) Human Pro-Inflammatory IL-6 and MSD Human Chemokine MCP-1 kits and analyzed using MSD Sector 2400 machine. RESULTS EC50 values for AEA, SMM-189, and HU-308 were 16 μM, 13 μM, and 7.3 μM respectively. LPS (1 μg/ml), TNF-α (10 ng/ml), and IL-1β (1 ng/ml) increased IL-6 and MCP-1 production, which were inhibited by AEA, SMM-189, and HU-308. AEA alone significantly increased IL-6, but not MCP-1 levels, but the other cannabinoids alone had no effect. CONCLUSION The effective inhibition of LPS, TNF-α, IL-1β stimulated IL-6 and MCP-1 production by CB2R ligands in hPDLFs suggests that targeting the endocannabinoid system may lead to development of novel drugs for periodontal therapy, aiding strategies to improve oral health.
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Affiliation(s)
- Ammaar H Abidi
- Department of General Practice Dentistry, College of Dentistry, The University of Tennessee Health Science Center, Memphis, TN, United States; Department of Pharmaceutical Sciences, College of Pharmacy, The University of Tennessee Health Science Center, Memphis, TN, United States
| | - Chaela S Presley
- Department of Pharmaceutical Sciences, College of Pharmacy, The University of Tennessee Health Science Center, Memphis, TN, United States
| | - Mustafa Dabbous
- Department of Bioscience Research, College of Dentistry, The University of Tennessee Health Science Center, Memphis, TN, United States; Department of Microbiology, Immunology and Biochemistry, College of Medicine, The University of Tennessee Health Science Center, Memphis, TN, United States
| | - David A Tipton
- Department of Bioscience Research, College of Dentistry, The University of Tennessee Health Science Center, Memphis, TN, United States
| | - Suni M Mustafa
- Department of Pharmaceutical Sciences, College of Pharmacy, The University of Tennessee Health Science Center, Memphis, TN, United States
| | - Bob M Moore
- Department of Pharmaceutical Sciences, College of Pharmacy, The University of Tennessee Health Science Center, Memphis, TN, United States.
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Compromised inflammatory cytokine response to P. gingivalis LPS by fibroblasts from inflamed human gingiva. Clin Oral Investig 2017; 22:919-927. [DOI: 10.1007/s00784-017-2171-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Accepted: 06/26/2017] [Indexed: 12/11/2022]
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Li M, Zhang C, Jin L, Matsuo K, Yang Y. Porphyromonas gingivalis lipopolysaccharide regulates ephrin/Eph signalling in human periodontal ligament fibroblasts. J Periodontal Res 2017; 52:913-921. [PMID: 28590061 PMCID: PMC5600103 DOI: 10.1111/jre.12463] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/09/2017] [Indexed: 12/29/2022]
Abstract
Objective EphrinA2‐EphA2 and ephrinB2‐EphB4 critically engage in bidirectional signalling to modulate alveolar bone remodelling. The present study aimed to investigate the effects of lipopolysaccharides (LPS) derived from Porphyromonas gingivalis on ephrin/Eph signalling in periodontal ligament fibroblasts (PDLFs). Material and Methods The primary cultured PDLFs were incubated in the absence (as a control) or presence of P. gingivalisLPS at 0.001‐10 μg/mL for 24 hours. The PDLFs were then stimulated with P. gingivalisLPS at the optimal concentration (0.1 μg/mL) for different periods (6‐48 hours). The expression of ephrinA2, ephrinB2, EphA2 and EphB4 was assessed by quantitative reverse‐transcription real‐time polymerase chain reaction and western blotting. The osteoblastic markers alkaline phosphatase, osteocalcin and Runt‐related transcription factor 2 (Runx2), and the osteoclastogenesis‐related factors receptor activator of nuclear factor kappa‐B ligand (RANKL) and osteoprotegerin were also evaluated. Results The ephrinA2 and EphA2 expression was upregulated and EphB4 expression was downregulated by stimulation of P. gingivalisLPS. EphrinA2 mRNA expression in the PDLFs was significantly upregulated from 12 to 48 hours (P<.05), whereas EphA2 exhibited no change for the first 24 hours, after which there was a significant increase at 48 hours (P<.05). EphB4 exhibited lower mRNA expression at 12 and 24 hours than did the control (P<.05), but the change was insignificant at 48 hours. In contrast, the expression of ephrinB2 remained unchanged. The expressions of ephrinA2, EphA2, ephrinB2 and EphB4 at the protein level showed a similar pattern to that at the mRNA level. The expression of Runx2 and osteocalcin significantly decreased, whereas that of RANKL/osteoprotegerin increased. Conclusion The present study suggest that P. gingivalisLPS would contribute to a dysregulation of bone remodelling, whereby ephrinA2/EphA2 expression is stimulated and EphB4 expression is inhibited.
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Affiliation(s)
- M Li
- Faculty of Dentistry, University of Hong Kong, Hong Kong, China
| | - C Zhang
- Faculty of Dentistry, University of Hong Kong, Hong Kong, China
| | - L Jin
- Faculty of Dentistry, University of Hong Kong, Hong Kong, China
| | - K Matsuo
- Keio University School of Medicine, Tokyo, Japan
| | - Y Yang
- Faculty of Dentistry, University of Hong Kong, Hong Kong, China
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Gabriele LG, Morandini AC, Dionísio TJ, Santos CF. Angiotensin II Type 1 Receptor Knockdown Impairs Interleukin-1β-Induced Cytokines in Human Periodontal Fibroblasts. J Periodontol 2017; 88:e1-e11. [DOI: 10.1902/jop.2016.160354] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Irwandi RA, Vacharaksa A. The role of microRNA in periodontal tissue: A review of the literature. Arch Oral Biol 2016; 72:66-74. [DOI: 10.1016/j.archoralbio.2016.08.014] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Revised: 08/04/2016] [Accepted: 08/12/2016] [Indexed: 01/12/2023]
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Bozkurt SB, Hakki SS, Hakki EE, Durak Y, Kantarci A. Porphyromonas gingivalis Lipopolysaccharide Induces a Pro-inflammatory Human Gingival Fibroblast Phenotype. Inflammation 2016; 40:144-153. [DOI: 10.1007/s10753-016-0463-7] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Hosokawa Y, Hosokawa I, Shindo S, Ohta Y, Ozaki K, Matsuo T. Alkannin inhibits CCL3 and CCL5 production in human periodontal ligament cells. Cell Biol Int 2016; 40:1380-1385. [DOI: 10.1002/cbin.10692] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Accepted: 10/12/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Yoshitaka Hosokawa
- Department of Conservative Dentistry; Institute of Biomedical Sciences; Tokushima University Graduate School; Tokushima Tokushima Japan
| | - Ikuko Hosokawa
- Department of Conservative Dentistry; Institute of Biomedical Sciences; Tokushima University Graduate School; Tokushima Tokushima Japan
| | - Satoru Shindo
- Department of Conservative Dentistry; Institute of Biomedical Sciences; Tokushima University Graduate School; Tokushima Tokushima Japan
| | - Yoshihiro Ohta
- Graduate School of Mathematical Sciences; University of Tokyo; Meguro-ku Tokyo Japan
| | - Kazumi Ozaki
- Department of Oral Health Care Promotion; Institute of Biomedical Sciences; Tokushima University Graduate School; Tokushima Japan
| | - Takashi Matsuo
- Department of Conservative Dentistry; Institute of Biomedical Sciences; Tokushima University Graduate School; Tokushima Tokushima Japan
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Grdović N, Rajić J, Petrović SM, Dinić S, Uskoković A, Mihailović M, Jovanović JA, Tolić A, Pucar A, Milašin J, Vidaković M. Association of CXCL12 gene promoter methylation with periodontitis in patients with diabetes mellitus type 2. Arch Oral Biol 2016; 72:124-133. [PMID: 27580404 DOI: 10.1016/j.archoralbio.2016.08.025] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Revised: 08/19/2016] [Accepted: 08/21/2016] [Indexed: 12/18/2022]
Abstract
OBJECTIVES CXCL12 is widely expressed, constitutive chemokine involved in tissue repair and regeneration, while the extent of its expression is important in various chronic inflammatory conditions. Involvement of DNA methylation in CXCL12 gene suppression (CXCL12) has been shown in malignancy and some autoimmune diseases. The aim of this study was to investigate whether the alterations in DNA methylation of CXCL12 are also involved in progression of periodontitis in combination with diabetes, as these chronic inflammatory conditions are strongly interrelated. DESIGN Study included 72 subjects divided in three groups: healthy control (C, n=21), periodontitis (P, n=29) and diabetes/periodontitis group (D/P, n=22). DNA extracted from epithelial cells obtained by sterile cotton swabs from buccal mucosa was subjected to methylation specific polymerase chain reaction (MSP) to obtain DNA methylation pattern of CXCL12 promoter. RESULTS CXCL12 promoter was predominantly unmethylated in all groups. However, increase in the frequency of the methylated form and increase in percent of methylation of CXCL12 promoter in periodontitis and diabetes/periodontitis group compared to control group were found, although without statistical significance. However, statistically significant increase in Tm of MSP products in diabetes/periodontitis group was observed. Correlation analysis revealed statistically significant relationship between the extent of DNA methylation of the CXCL12 promoter and periodontal parameters, as well as between DNA methylation of CXCL12 and glycosylated hemoglobin. CONCLUSION Presented results suggest that chronic inflammation contributes to the change of CXCL12 DNA methylation in buccal cells and that DNA methylation profile of CXCL12 promoter plays important role in development and progression of periodontal disease.
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Affiliation(s)
- Nevena Grdović
- Institute for Biological Research "Siniša Stanković", Department of Molecular Biology, University of Belgrade, Bulevar despota Stefana 142, 11000 Belgrade, Serbia
| | - Jovana Rajić
- Institute for Biological Research "Siniša Stanković", Department of Molecular Biology, University of Belgrade, Bulevar despota Stefana 142, 11000 Belgrade, Serbia
| | - Sanja Matić Petrović
- Department of Periodontology and Oral Medicine, School of Dental Medicine, University of Belgrade, Dr Subotica 8, 11000 Belgrade, Serbia
| | - Svetlana Dinić
- Institute for Biological Research "Siniša Stanković", Department of Molecular Biology, University of Belgrade, Bulevar despota Stefana 142, 11000 Belgrade, Serbia
| | - Aleksandra Uskoković
- Institute for Biological Research "Siniša Stanković", Department of Molecular Biology, University of Belgrade, Bulevar despota Stefana 142, 11000 Belgrade, Serbia
| | - Mirjana Mihailović
- Institute for Biological Research "Siniša Stanković", Department of Molecular Biology, University of Belgrade, Bulevar despota Stefana 142, 11000 Belgrade, Serbia
| | - Jelena Arambašić Jovanović
- Institute for Biological Research "Siniša Stanković", Department of Molecular Biology, University of Belgrade, Bulevar despota Stefana 142, 11000 Belgrade, Serbia
| | - Anja Tolić
- Institute for Biological Research "Siniša Stanković", Department of Molecular Biology, University of Belgrade, Bulevar despota Stefana 142, 11000 Belgrade, Serbia
| | - Ana Pucar
- Department of Periodontology and Oral Medicine, School of Dental Medicine, University of Belgrade, Dr Subotica 8, 11000 Belgrade, Serbia
| | - Jelena Milašin
- Institute of Human Genetics, School of Dental Medicine, University of Belgrade, Dr Subotica 8, 11000 Belgrade, Serbia
| | - Melita Vidaković
- Institute for Biological Research "Siniša Stanković", Department of Molecular Biology, University of Belgrade, Bulevar despota Stefana 142, 11000 Belgrade, Serbia.
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Healthy and Inflamed Gingival Fibroblasts Differ in Their Inflammatory Response to Porphyromonas gingivalis Lipopolysaccharide. Inflammation 2016; 39:1842-52. [DOI: 10.1007/s10753-016-0421-4] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Sun J, Nemoto E, Hong G, Sasaki K. Modulation of stromal cell-derived factor 1 alpha (SDF-1α) and its receptor CXCR4 in Porphyromonas gingivalis-induced periodontal inflammation. BMC Oral Health 2016; 17:26. [PMID: 27449062 PMCID: PMC4957851 DOI: 10.1186/s12903-016-0250-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Accepted: 07/12/2016] [Indexed: 01/07/2023] Open
Abstract
Background The production of chemokines by tissue resident cells during inflammation is considered one of the main mechanisms involved in the formation of inflammatory infiltrates. Fibroblasts are the main resident cell type in gingival and periodontal ligament tissues, and their ability to produce chemokine stromal cell-derived factor 1 alpha (SDF-1α) and its receptor CXCR4 under stimulation by gram negative bacteria, Porphyromonas gingivalis, commonly found in periodontal infections was investigated. Methods Western blots were used to assess SDF-1α and CXCR4 protein expression levels in human gingival fibroblast cells (HGF-1) induced by Lipopolysaccharide (LPS) from P. gingivalis in the presence or absence of LY294002, a highly selective inhibitor of PI-3K/Akt. RT-PCR and quantitative Real-time PCR was performed using gingival mRNAs from periodontitis patients. Immunohistochemistry was performed to analyze the expression and subcellular localization of SDF-1α and CXCR4, together with NF-kβ phosphorylation, in specimens from patients with periodontitis and in an experimental rat periodontitis model. Results We found that P. gingivalis LPS up-regulated SDF-1α and CXCR4 protein levels and elevated phosphorylation of the SDF-1α-responsive NF-kβ and Akt at 24 h in HGF-1 cells. SDF-1α and CXCR4 mRNA and protein expression levels were high in all patients with periodontitis. In the P. gingivalis-induced rat experimental periodontitis model, SDF-1α and CXCR4 immunoreactivity was higher in gingival and periodontal ligament tissues compared to the control. Conclusion Our data showed that PI-3K/Akt is an upstream participant in the P. gingivalis LPS-mediated induction of SDF-1α. Taken together, these results suggest that the chemokine SDF-1α and its receptor CXCR4 contribute to P. gingivalis-induced periodontal inflammation.
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Affiliation(s)
- Jiang Sun
- Department of Periodontics and Oral Mucosa Disease, Dalian Stomatological Hospital, 935 Changjiang Road, Shahekou District, Dalian, 116021, China. .,Department of Periodontology and Endodontology, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Japan.
| | - Eiji Nemoto
- Department of Periodontology and Endodontology, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Japan
| | - Guang Hong
- Liaison Center for Innovative Dentistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Japan
| | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Japan
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Gankovskaya LV, Khelminskaya NM, Molchanova EA, Svitich OA. ROLE OF INNATE IMMUNITY FACTORS IN PERIODONTITIS PATHOGENESIS. ACTA ACUST UNITED AC 2016. [DOI: 10.36233/0372-9311-2016-2-100-107] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Chronic generalized periodontitis (CGP) is a disease of periodontium tissues supporting tooth induced by bacteria, that is characterized by the presence of processes of inflammation with destruction ofbone tissue. The knowledge of molecular mechanisms of CGP pathogenesis facilitates creation of the most effective methods of therapy of this disease. Bacterial infection is a primary factor in periodontitis etiology, however is not sufficient for its start and subsequent development. It is known, that bacterial factors induce a local inflammation reaction and activate the system of innate immunity through activation of Toll-like receptors (TLR), located on the surface of resident cells and leukocytes. Activation of these cells results in production of pro-inflammatory cytokines and recruitment of phagocytes and lymphocytes into the inflammation zone. In review we examined the known data regarding factors of immune protection of periodontium including cell populations and cytokines, as well as mechanisms of tissue destruction, that support the tooth. Perspectives of therapy are also discussed.
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Santos CF, Morandini AC, Dionísio TJ, Faria FA, Lima MC, Figueiredo CM, Colombini-Ishikiriama BL, Sipert CR, Maciel RP, Akashi AP, Souza GP, Garlet GP, Rodini CO, Amaral SL, Becari C, Salgado MC, Oliveira EB, Matus I, Didier DN, Greene AS. Functional Local Renin-Angiotensin System in Human and Rat Periodontal Tissue. PLoS One 2015; 10:e0134601. [PMID: 26244896 PMCID: PMC4526652 DOI: 10.1371/journal.pone.0134601] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Accepted: 07/12/2015] [Indexed: 12/28/2022] Open
Abstract
The initiation or progression of periodontitis might involve a local renin-angiotensin system (RAS) in periodontal tissue. The aim of this study was to further characterize the local RAS in human and rat periodontal tissues between healthy and periodontally-affected tissue. Components of the RAS were investigated using in vitro, ex vivo and in vivo experiments involving both human and Wistar rat periodontium. Although not upregulated when challenged with P. gingivalis-lipopolysaccharide, human gingival and periodontal ligament fibroblasts expressed RAS components. Likewise, healthy and inflamed human gingiva expressed RAS components, some of which were shown to be functional, yet no differences in expression were found between healthy and diseased gingiva. However, in inflamed tissue the immunoreactivity was greater for the AT1R compared to AT2R in fibroblasts. When compared to healthy tissue, ACE activity was increased in human gingiva from volunteers with gingivitis. Human-gingiva homogenates generated Ang II, Ang 1-9 and Ang 1-7 when incubated with precursors. In gingiva homogenates, Ang II formation from Ang I was nearly abolished only when captopril and chymostatin were combined. Ang 1-7 formation was significantly greater when human gingiva homogenates were incubated with chymostatin alone compared to incubation without any inhibitor, only captopril, or captopril and chymostatin. In rat gingiva, RAS components were also found; their expression was not different between healthy and experimentally induced periodontitis (EP) groups. However, renin inhibition (aliskiren) and an AT1R antagonist (losartan) significantly blocked EP-alveolar-bone loss in rats. Collectively, these data are consistent with the hypothesis that a local RAS system is not only present but is also functional in both human and rat periodontal tissue. Furthermore, blocking AT1R and renin can significantly prevent periodontal bone loss induced by EP in rats.
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Affiliation(s)
- Carlos F. Santos
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
- * E-mail:
| | - Ana C. Morandini
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | - Thiago J. Dionísio
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | - Flávio A. Faria
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | - Marta C. Lima
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | - Caio M. Figueiredo
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | | | - Carla R. Sipert
- Department of Restorative Dentistry, School of Dentistry, University of São Paulo, São Paulo, São Paulo, Brazil
| | - Rubens P. Maciel
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | - Ana P. Akashi
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | - Gabriela P. Souza
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | - Gustavo P. Garlet
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | - Camila O. Rodini
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | - Sandra L. Amaral
- Department of Physical Education, Science Faculty, São Paulo State University, Bauru, São Paulo, Brazil
| | - Christiane Becari
- School of Medicine of Ribeirão Preto, Riberão Preto, University of São Paulo, Riberão Preto, São Paulo, Brazil
| | - Maria C. Salgado
- School of Medicine of Ribeirão Preto, Riberão Preto, University of São Paulo, Riberão Preto, São Paulo, Brazil
| | - Eduardo B. Oliveira
- School of Medicine of Ribeirão Preto, Riberão Preto, University of São Paulo, Riberão Preto, São Paulo, Brazil
| | - Isaac Matus
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America
| | - Daniela N. Didier
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America
| | - Andrew S. Greene
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America
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Yang S, Yang TS, Wang F, Su SB. High-mobility group box-1-Toll-Like receptor 4 axis mediates the recruitment of endothelial progenitor cells in alkali-induced corneal neovascularization. Int Immunopharmacol 2015. [PMID: 26202806 DOI: 10.1016/j.intimp.2015.07.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Abstract
Endothelial progenitor cells (EPCs) promote both physiological and pathological neovascularization. Recently we found high-mobility group box-1 (HMGB1)-Toll-like receptor 4 (TLR4) signaling pathway promotes corneal neovascularization (CNV) induced by alkali in a mouse model. However, it is still unclear whether HMGB1-TLR4 promotes the mobility of EPCs. In this study, we explored the role of HMGB1-TLR4 signaling in EPC recruitment by modulating the activity of HMGB1-TLR4 signaling in the corneas of alkali-induced CNV mouse model. The level of EPC recruitment in injured corneas, as detected by flow cytometry, is increased and reaches the peak level 4days after injury. Activating TLR4 with exogenous HMGB1 or LPS enhances the EPC recruitment, whereas inhibiting the activity of HMGB1 and TLR4 with A-box (selective HMGB1 antagonist) or LPS-RS (selective TLR4 antagonist), respectively, reverses this phenotype. Moreover, the TLR4 mediated EPC recruitment is associated with up-regulation of stromal cell-derived factor-1 (SDF-1), a pivotal cytokine in EPC mobilization. Activation of TLR4 or HMGB1 leads to increased SDF-1 expression, while blocking TLR4 or HMGB1 inhibits the expression of SDF-1. Topical administration of AMD-3100, an antagonist of SDF-1 receptor, suppresses the TLR4-mediated EPC recruitment and ameliorates CNV. Our results indicated that activation of HMGB1-TLR4 signaling pathway promotes EPC recruitment in CNV, at least in part through up-regulation of SDF-1.
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Affiliation(s)
- Shuai Yang
- Department of Ophthalmology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, China
| | - Tian-Shu Yang
- Department of Ophthalmology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, China
| | - Fang Wang
- Department of Ophthalmology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, China.
| | - Shao-Bo Su
- Department of Ophthalmology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, China.
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Preedy VR, Patel VB, Al-Sabbagh M. Macrophage Inflammatory Protein-1 Alpha (MIP-1 alpha)/CCL3: As a Biomarker. GENERAL METHODS IN BIOMARKER RESEARCH AND THEIR APPLICATIONS 2015. [PMCID: PMC7124056 DOI: 10.1007/978-94-007-7696-8_27] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Macrophage inflammatory protein-1 alpha (MIP-1α/CCL3) is a chemotactic chemokine secreted by macrophages. It performs various biological functions, such as recruiting inflammatory cells, wound healing, inhibition of stem cells, and maintaining effector immune response. It activates bone resorption cells and directly induces bone destruction. Cells that secrete MIP-1α/CCL3 are increased at sites of inflammation and bone resorption. MIP-1α/CCL3 plays an important role in the pathogenesis of various inflammatory diseases and conditions that exhibit bone resorption, such as periodontitis, multiple myeloma, Sjögren syndrome, and rheumatoid arthritis. Biological fluids from patients with these diseases exhibit elevated levels of MIP-1α/CCL3. This finding indicates that MIP-1\documentclass[12pt]{minimal}
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\begin{document}$$ \alpha $$\end{document}α/CCL3 protein may have diagnostic potential for the detection of several inflammatory diseases and conditions. This chapter discusses the biological functions of MIP-1α/CCL3; describes several diseases associated with MIP-1α/CCL3, particularly periodontitis; and delineates the potential application of MIP-1α/CCL3 as a biomarker.
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Affiliation(s)
- Victor R. Preedy
- grid.13097.3c0000000123226764Department of Nutrition and Dietetics, Division of Diabetes & Nutritional Sciences, Faculty of Life Sciences & Medicine, King's College London, London, United Kingdom
| | - Vinood B. Patel
- grid.12896.340000000090468598Faculty of Science & Technology, Department of Biomedical Sciences, University of Westminster, London, United Kingdom
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Local and systemic immune responses in gingivitis and periodontitis. Open Med (Wars) 2014. [DOI: 10.2478/s11536-013-0328-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Abstract
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40
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Häkkinen L, Larjava H, Fournier BPJ. Distinct phenotype and therapeutic potential of gingival fibroblasts. Cytotherapy 2014; 16:1171-86. [PMID: 24934304 DOI: 10.1016/j.jcyt.2014.04.004] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2013] [Revised: 03/13/2014] [Accepted: 04/04/2014] [Indexed: 01/15/2023]
Abstract
Gingiva of the oral mucosa provides a practical source to isolate fibroblasts for therapeutic purposes because the tissue is easily accessible, tissue discards are common during routine clinical procedures and wound healing after biopsy is fast and results in complete wound regeneration with very little morbidity or scarring. In addition, gingival fibroblasts have unique traits, including neural crest origin, distinct gene expression and synthetic properties and potent immunomodulatory functions. These characteristics may provide advantages for certain therapeutic approaches over other more commonly used cells, including skin fibroblasts, both in intraoral and extra-oral sites. However, identity and phenotype of gingival fibroblasts, like other fibroblasts, are still not completely understood. Gingival fibroblasts are phenotypically heterogeneous, and these…fibroblast subpopulations may play different roles in tissue maintenance, regeneration and pathologies. The purpose of this review is to summarize what is currently known about gingival fibroblasts, their distinct potential for tissue regeneration and their potential therapeutic uses in the future.
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Affiliation(s)
- Lari Häkkinen
- Department of Oral Biological and Medical Sciences, Faculty of Dentistry, University of British Columbia, Vancouver, Canada.
| | - Hannu Larjava
- Department of Oral Biological and Medical Sciences, Faculty of Dentistry, University of British Columbia, Vancouver, Canada
| | - Benjamin P J Fournier
- Department of Oral Biological and Medical Sciences, Faculty of Dentistry, University of British Columbia, Vancouver, Canada; Paris Diderot University, Dental School, Rotschild Hospital, AP-HP, Paris, France; UMRS872, Team 5, Molecular Oral Physiopathology, CRC Les Cordeliers, Paris, 75006, INSERM UMRS872, Pierre et Marie Curie University, Paris Descartes University, Paris, France
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Sipert CR, Morandini AC, Dionísio TJ, Trachtenberg AJ, Kuo WP, Santos CF. MicroRNA-146a and microRNA-155 show tissue-dependent expression in dental pulp, gingival and periodontal ligament fibroblasts in vitro. J Oral Sci 2014; 56:157-64. [PMID: 24930753 PMCID: PMC11067546 DOI: 10.2334/josnusd.56.157] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
MicroRNAs (miRNAs) are small non-coding RNAs showing a tissue-specific expression pattern, and whose function is to suppress protein synthesis. In this study, we hypothesized that expression of miRNAs would differ among fibroblasts from dental pulp (DPF), gingiva (GF) and periodontal ligament (PLF) in vitro. Once established by an explant technique, DPF, GF and PLF were collected for RNA isolation and subjected to a miRNA microarray. Next, cells were stimulated with E. coli lipopolysaccharide (LPS) for 24 h and then collected for RNA isolation. Expression of miR-146a and miR-155 was investigated by qPCR. Microarray screening revealed several miRNAs that showed specifically high expression in at least one of the fibroblast subtypes. These molecules are potentially involved in the regulation of extracellular matrix turnover and production of inflammatory mediators. Microarray analysis showed that both miR-146a and miR-155 were among the miRNAs expressed exclusively in GF. qPCR demonstrated significant upregulation of miR-146a only in GF after LPS stimulation, whereas basal expression of miR-155 was higher in GF than in the other cell subtypes. LPS downregulated the expression of miR-155 only in GF. Our results suggest that the expression and regulation of miR-146a and miR-155 are more pronounced in GF than in DPF and PLF.
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Affiliation(s)
- Carla R. Sipert
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
| | - Ana C. Morandini
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
| | - Thiago J. Dionísio
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
| | - Alexander J. Trachtenberg
- Harvard Catalyst - Laboratory for Innovative Translational Technologies, Harvard Medical School, Boston, MA, USA
| | - Winston P. Kuo
- Harvard Clinical and Translational Science Center, Laboratory for Innovative Translational Technologies, Harvard Medical School, Boston, MA, USA
- Department of Developmental Biology, Harvard School of Dental Medicine, Boston, MA, USA
| | - Carlos F. Santos
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
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Doyle CJ, Fitzsimmons TR, Marchant C, Dharmapatni AASSK, Hirsch R, Bartold PM. Azithromycin suppresses P. gingivalis LPS-induced pro-inflammatory cytokine and chemokine production by human gingival fibroblasts in vitro. Clin Oral Investig 2014; 19:221-7. [DOI: 10.1007/s00784-014-1249-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2014] [Accepted: 04/24/2014] [Indexed: 02/04/2023]
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Yashiro Y, Nomura Y, Kanazashi M, Noda K, Hanada N, Nakamura Y. Function of chemokine (CXC motif) ligand 12 in periodontal ligament fibroblasts. PLoS One 2014; 9:e95676. [PMID: 24806431 PMCID: PMC4012992 DOI: 10.1371/journal.pone.0095676] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Accepted: 03/30/2014] [Indexed: 01/09/2023] Open
Abstract
The periodontal ligament (PDL) is one of the connective tissues located between the tooth and bone. It is characterized by rapid turnover. Periodontal ligament fibroblasts (PDLFs) play major roles in the rapid turnover of the PDL. Microarray analysis of human PDLFs (HPDLFs) and human dermal fibroblasts (HDFs) demonstrated markedly high expression of chemokine (CXC motif) ligand 12 (CXCL12) in the HPDLFs. CXCL12 plays an important role in the migration of mesenchymal stem cells (MSCs). The function of CXCL12 in the periodontal ligament was investigated in HPDLFs. Expression of CXCL12 in HPDLFs and HDFs was examined by RT-PCR, qRT-PCR and ELISA. Chemotactic ability of CXCL12 was evaluated in both PDLFs and HDFs by migration assay of MSCs. CXCL12 was also immunohistochemically examined in the PDL in vivo. Expression of CXCL12 in the HPDLFs was much higher than that in HDFs in vitro. Migration assay demonstrated that the number of migrated MSCs by HPDLFs was significantly higher than that by HDFs. In addition, the migrated MSCs also expressed CXCL12 and several genes that are familiar to fibroblasts. CXCL12 was immunohistochemically localized in the fibroblasts in the PDL of rat molars. The results suggest that PDLFs synthesize and secrete CXCL12 protein and that CXCL12 induces migration of MSCs in the PDL in order to maintain rapid turnover of the PDL.
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Affiliation(s)
- Yuichi Yashiro
- Department of Orthodontics, School of Dental Medicine, Tsurumi University, Yokohama, Japan
| | - Yoshiaki Nomura
- Department of Translational Research, School of Dental Medicine, Tsurumi University, Yokohama, Japan
| | - Mikimoto Kanazashi
- Department of Periodontology, School of Dental Medicine, Tsurumi University, Yokohama, Japan
| | - Koji Noda
- Department of Orthodontics, School of Dental Medicine, Tsurumi University, Yokohama, Japan
| | - Nobuhiro Hanada
- Department of Translational Research, School of Dental Medicine, Tsurumi University, Yokohama, Japan
| | - Yoshiki Nakamura
- Department of Orthodontics, School of Dental Medicine, Tsurumi University, Yokohama, Japan
- * E-mail:
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Azevedo FP, Morandini ACF, Sipert CR, Dionísio TJ, Santos CF, Damante CA, de Rezende MLR, Sant'ana ACP, Greghi SLA. Palatal mucosa derived fibroblasts present an adaptive behavior regarding cytokine secretion when grafted onto the gingival margin. BMC Oral Health 2014; 14:21. [PMID: 24646168 PMCID: PMC3994569 DOI: 10.1186/1472-6831-14-21] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2013] [Accepted: 03/07/2014] [Indexed: 12/03/2022] Open
Abstract
Background Considering that grafted gingival tissue might have to be adapted to the receptor area and that fibroblasts have the ability to respond to bacterial stimuli through the release of various cytokines, this study investigated whether fibroblasts from the palatal mucosa behave differently when grafted onto the gingival margin regarding cytokine secretion. Methods Biopsies from the palatal mucosa were collected at the time of free gingival graft surgery, and after four months re-collection was performed upon surgery for root coverage. Fibroblasts were isolated by the explant technique, cultured and stimulated with Porphyromonas gingivalis (Pg) and Escherichia coli (Ec) LPS for 24 or 48 h for comparative evaluation of the secretion of cytokines and chemokines, such as IL-6, IL-8/CXCL8, MIP-1α/CCL3, TGF-β, VEGF and CXCL16. Unstimulated cells were used as the control group. Cells were tested for viability through MTT assay, and secretion of cytokines and chemokines was evaluated in the cell supernatants by Enzyme-Linked Immunosorbent Assay (ELISA). Results Fibroblasts from the palatal mucosa maintained the same secretion pattern of IL-6 when grafted onto the gingival margin. On the contrary, fibroblasts from the marginal gingival graft showed increased secretion of IL-8/CXCL8 even in the absence of stimulation. Interestingly, MIP-1α/CCL3 secretion by fibroblasts from the marginal gingival graft was significantly increased after 48 hours of stimulation with Pg LPS and after 24 h with Ec LPS. Only fibroblasts from the marginal gingival graft showed secretion of TGF-β. VEGF and CXCL16 secretion were not detected by both subsets of fibroblasts. Conclusion Fibroblasts from the palatal mucosa seem to be adapted to local conditions of the site microenvironment when grafted onto the gingival marginal area. This evidence supports the effective participation of fibroblasts in the homeostasis of the marginal periodontium through secretion modulation of important inflammatory mediators.
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Affiliation(s)
| | | | | | | | - Carlos Ferreira Santos
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil.
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Márton IJ, Kiss C. Overlapping Protective and Destructive Regulatory Pathways in Apical Periodontitis. J Endod 2014; 40:155-63. [DOI: 10.1016/j.joen.2013.10.036] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2013] [Revised: 09/26/2013] [Accepted: 10/24/2013] [Indexed: 02/06/2023]
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Sipert CR, Morandini ACDF, Modena KCDS, Dionísio TJ, Machado MAAM, Oliveira SHPD, Campanelli AP, Santos CF. CCL3 and CXCL12 production in vitro by dental pulp fibroblasts from permanent and deciduous teeth stimulated by Porphyromonas gingivalis LPS. J Appl Oral Sci 2013; 21:99-105. [PMID: 23739851 PMCID: PMC3881878 DOI: 10.1590/1678-7757201300004] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2013] [Accepted: 03/06/2013] [Indexed: 01/25/2023] Open
Abstract
OBJECTIVE The aim of this study was to compare the production of the chemokines CCL3 and CXCL12 by cultured dental pulp fibroblasts from permanent (PDPF) and deciduous (DDPF) teeth under stimulation by Porphyromonas gingivalis LPS (PgLPS). MATERIAL AND METHODS Primary culture of fibroblasts from permanent (n=3) and deciduous (n=2) teeth were established using an explant technique. After the fourth passage, fibroblasts were stimulated by increasing concentrations of PgLPS (0-10 µg/mL) at 1, 6 and 24 h. The cells were tested for viability through MTT assay, and production of the chemokines CCL3 and CXCL12 was determined through ELISA. Comparisons among samples were performed using One-way ANOVA for MTT assay and Two-way ANOVA for ELISA results. RESULTS Cell viability was not affected by the antigen after 24 h of stimulation. PgLPS induced the production of CCL3 by dental pulp fibroblasts at similar levels for both permanent and deciduous pulp fibroblasts. Production of CXCL12, however, was significantly higher for PDPF than DDPF at 1 and 6 h. PgLPS, in turn, downregulated the production of CXCL12 by PDPF but not by DDPF. CONCLUSION These data suggest that dental pulp fibroblasts from permanent and deciduous teeth may present a differential behavior under PgLPS stimulation.
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Affiliation(s)
- Carla Renata Sipert
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
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47
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Sipert CR, Morandini AC, Dionísio TJ, Machado MAAM, Oliveira SHP, Campanelli AP, Kuo WP, Santos CF. In vitro regulation of CCL3 and CXCL12 by bacterial by-products is dependent on site of origin of human oral fibroblasts. J Endod 2013; 40:95-100. [PMID: 24331998 DOI: 10.1016/j.joen.2013.09.031] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2013] [Revised: 08/08/2013] [Accepted: 09/19/2013] [Indexed: 10/26/2022]
Abstract
INTRODUCTION Production of chemokines by tissue resident cells is one of the main mechanisms involved in the inflammatory infiltrate formation during inflammation. The specific ability of fibroblasts from different oral tissues such as gingiva, periodontal ligament, and dental pulp from permanent and deciduous teeth in producing the chemokines CCL3 and CXCL12 under stimulation by bacterial products commonly found in endodontic infections was investigated. METHODS Cultures of fibroblasts from gingiva and periodontal ligament as well as from dental pulp from permanent and deciduous teeth were established by using an explant technique and stimulated with increasing concentrations of Escherichia coli lipopolysaccharide (EcLPS) and Enterococcus faecalis lipoteichoic acid (EfLTA) for 1, 6, and 24 hours. Supernatants were tested for CCL3 and CXCL12 by enzyme-linked immunosorbent assay. RESULTS In general, CCL3 production was induced by EcLPS in the 4 fibroblast subtypes and by EfLTA in fibroblasts from gingiva and periodontal ligament. Constitutive CXCL12 synthesis decreased in all fibroblast subtypes especially under stimulation with EcLPS. Fibroblast from permanent deciduous teeth was the cell type presenting the most expressive reduction in CXCL12 release by both stimuli. On the basis of computational matching of CXCL12 mRNA with the microRNAs miR-141 and miR-200a, their expression was also investigated. Although detected in the fibroblasts, these molecules remained unaltered by bacterial by-product stimulation. CONCLUSIONS EcLPS and EfLTA induced the production of CCL3 and unbalanced the synthesis of CXCL12 in a manner dependent on the specific tissue origin of fibroblasts.
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Affiliation(s)
- Carla Renata Sipert
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | - Ana Carolina Morandini
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | - Thiago José Dionísio
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | | | - Sandra Helena Penha Oliveira
- Department of Basic Sciences, Araçatuba School of Dentistry, Universidade Estadual Paulista, Araçatuba, São Paulo, Brazil
| | - Ana Paula Campanelli
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | - Winston Patrick Kuo
- Harvard Clinical and Translational Science Center, Laboratory for Innovative Translational Technologies, Harvard Medical School and Department of Developmental Biology, Harvard School of Dental Medicine, Boston, Massachusetts
| | - Carlos Ferreira Santos
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil.
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Domon H, Tabeta K, Nakajima T, Yamazaki K. Age-related alterations in gene expression of gingival fibroblasts stimulated with Porphyromonas gingivalis. J Periodontal Res 2013; 49:536-43. [DOI: 10.1111/jre.12134] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/11/2013] [Indexed: 12/27/2022]
Affiliation(s)
- H. Domon
- Laboratory of Periodontology and Immunology; Division of Oral Science for Health Promotion; Niigata University Graduate School of Medical and Dental Sciences; Niigata Japan
- Division of Periodontology; Department of Oral Biological Science; Niigata University Graduate School of Medical and Dental Sciences; Niigata Japan
| | - K. Tabeta
- Laboratory of Periodontology and Immunology; Division of Oral Science for Health Promotion; Niigata University Graduate School of Medical and Dental Sciences; Niigata Japan
- Division of Periodontology; Department of Oral Biological Science; Niigata University Graduate School of Medical and Dental Sciences; Niigata Japan
| | - T. Nakajima
- Laboratory of Periodontology and Immunology; Division of Oral Science for Health Promotion; Niigata University Graduate School of Medical and Dental Sciences; Niigata Japan
- General Dentistry and Clinical Education Unit; Niigata University Medical and Dental Hospital; Niigata Japan
| | - K. Yamazaki
- Laboratory of Periodontology and Immunology; Division of Oral Science for Health Promotion; Niigata University Graduate School of Medical and Dental Sciences; Niigata Japan
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Zhang J, Zhang Y, Lv H, Yu Q, Zhou Z, Zhu Q, Wang Z, Cooper PR, Smith AJ, Niu Z, He W. Human stem cells from the apical papilla response to bacterial lipopolysaccharide exposure and anti-inflammatory effects of nuclear factor I C. J Endod 2013; 39:1416-22. [PMID: 24139265 DOI: 10.1016/j.joen.2013.07.018] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Revised: 07/18/2013] [Accepted: 07/23/2013] [Indexed: 12/14/2022]
Abstract
INTRODUCTION Stem cells from the apical papilla (SCAPs) are important for tooth root development and may be candidates for regenerative endodontic procedures involving immature teeth. The potential use of SCAPs for clinical applications requires a better understanding of their responses to bacterial challenge. We have investigated the effects of exposure of these cells to lipopolysaccharide (LPS). Inflammatory responses arising from bacterial challenges can constrain postinjury tissue regeneration and the effects of nuclear factor I C (NFIC), which plays a critical role in tooth root development. NFIC has been explored for its anti-inflammatory action in the context of endodontic treatment of immature teeth where continued root development is an important outcome. METHODS SCAPs were exposed to LPS, and the expression of Toll-like receptor-4 (TLR4), interleukin (IL)-6, IL-8, and tumor necrosis factor (TNF-α) were assessed by real-time polymerase chain reaction (RT-PCR). The pLenti6.3/v5-NFIC plasmid encoding the full-length NFIC or NFIC silencing by si-RNA (small interfering RNA) in SCAPs were measured by Western blotting or RT-PCR; the effects of NFIC on IL-6, IL-8, and TNF-α were analyzed by RT-PCR. The protein levels were subsequently measured by enzyme-linked immunoassay. RESULTS LPS induced the synthesis of IL-6, IL-8, and TNF-α in SCAPs in a time-dependent manner. Pretreatment with a TLR4 inhibitor significantly inhibited LPS-induced IL-6, IL-8, and TNF-α expression. Knockdown of NFIC increased the expression of IL-6, IL-8, and TNF-α, whereas the overexpression of NFIC resulted in the suppression of the inflammatory response stimulated by 1 μg/mL LPS, especially for IL-8. Together, these data show that LPS is recognized by the transmembranous receptor TLR4 to mediate inflammatory responses in SCAPs and NFIC overexpression can suppress LPS-initiated innate immune responses. CONCLUSIONS The anti-inflammatory effects of NFIC overexpression provide a valuable target to dampen inflammatory responses in the infected pulp to allow tissue regeneration to occur.
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Affiliation(s)
- Jing Zhang
- Department of Operative Dentistry, School of Dentistry, The Fourth Military Medical University, Xi'an, China
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Walker JM, Maitra A, Walker J, Ehrnhoefer-Ressler MM, Inui T, Somoza V. Identification of Magnolia officinalis L. Bark Extract as the Most Potent Anti-Inflammatory of Four Plant Extracts. THE AMERICAN JOURNAL OF CHINESE MEDICINE 2013; 41:531-44. [DOI: 10.1142/s0192415x13500389] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
This study was designed to compare the anti-inflammatory potential of a Magnolia officinalis L. bark extract solely or in combination with extracts prepared from either Polygonum aviculare L., Sambucus nigra L., or Isodon japonicus L. in bacterial lipopolysaccharide (LPS) stimulated human gingival fibroblasts (HGF-1) and human U-937 monocytes, as cell models of periodontal disease. HGF-1 and U-937 cells were incubated with LPS from either Porphyromonas gingivalis or Escherichia coli together with the four plant extracts alone or in combination. Secretion of anti-inflammatory cytokines from HGF-1 and U-937 cells was measured by means of a multiplexed bead assay system. Magnolia officinalis L. bark extract, at concentrations of 1 μg/mL and 10 μg/mL, reduced interleukin 6 (IL-6) and interleukin-8 (IL-8) secretion from HGF-1 cells to 72.5 ± 28.6% and reduced matrix metalloproteinase 2 (MMP-2) and matrix metalloproteinase 9 (MMP-9) secretion from U-937 cells to 8.87 ± 7.97% compared to LPS-treated cells (100%). The other three extracts also reduced secretion of these inflammatory markers but were not as effective. Combination of 9 μg/mL Magnolia officinalis L. extract with 1 μg/mL of each of the other extracts maintained the anti-inflammatory effect of Magnolia officinalis L. extract. Combination of 5 μg/mL Magnolia officinalis L. extract with 5 μg/mL Isodon japonicus L. extract also maintained the anti-inflammatory potential of the Magnolia officinalis L. extract, whereas increasing concentrations of any of the other plant extracts in the combination experiments reduced the Magnolia officinalis L. extract efficacy in U-937 cells.
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Affiliation(s)
- Joel M. Walker
- Department of Nutritional and Physiological Chemistry, University of Vienna, Althanstrasse 14, 1090, Vienna, Austria
| | | | - Jessica Walker
- Department of Nutritional and Physiological Chemistry, University of Vienna, Althanstrasse 14, 1090, Vienna, Austria
| | - Miriam M. Ehrnhoefer-Ressler
- Department of Nutritional and Physiological Chemistry, University of Vienna, Althanstrasse 14, 1090, Vienna, Austria
| | - Taichi Inui
- Wm. Wrigley Jr. Company, Chicago, IL 60611, USA
| | - Veronika Somoza
- Department of Nutritional and Physiological Chemistry, University of Vienna, Althanstrasse 14, 1090, Vienna, Austria
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