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Sun W, Yang T, Wang C, Li H, Lei L. Mitochondrial ROS participates in Porphyromonas gingivalis-induced pyroptosis in cementoblasts. Heliyon 2024; 10:e30814. [PMID: 38774076 PMCID: PMC11107101 DOI: 10.1016/j.heliyon.2024.e30814] [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: 06/26/2023] [Revised: 04/02/2024] [Accepted: 05/06/2024] [Indexed: 05/24/2024] Open
Abstract
This study aimed to investigate correlation between mitochondrial reactive oxygen species and Porphyromonas gingivalis in the process of cementoblast pyroptosis. Lactate dehydrogenase activity assay, enzyme-linked immunosorbent assay, western blotting and flow cytometry analysis were utilized to explore whether Porphyromonas gingivalis triggered pyroptosis in cementoblasts. Reactive oxygen species and mitochondrial reactive oxygen species were detected using flow cytometry and fluorescence staining. The effect of mitochondrial reactive oxygen species on the Porphyromonas gingivalis-induced pyroptosis of cementoblasts was assessed by Mito-Tempo, mitochondrion-targeted superoxide dismutase mimetic. Phosphorylation levels of p65 were measured by western blotting. SC75741, a nuclear factor-kappa B inhibitor, was added to block the nuclear factor-kappa B in the Porphyromonas gingivalis-infected cementoblasts. Porphyromonas gingivalis triggered pyroptosis of cementoblasts, and an elevation in reactive oxygen species generation in the mitochondria was observed. Inhibition of mitochondrial reactive oxygen species reduced pyroptosis and nuclear factor-kappa B signaling pathway mediated the pyroptotic cell death in Porphyromonas gingivalis-infected cementoblasts. Together, our findings demonstrate that mitochondrial reactive oxygen species increased by Porphyromonas gingivalis participated in the pyroptosis of cementoblasts. Targeting mitochondrial reactive oxygen species may offer therapeutic strategies for root surface remodeling or periodontal regeneration.
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Affiliation(s)
- Weiman Sun
- Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Research Institute of Stomatology, Nanjing University, Nanjing, China
- Central Laboratory of Stomatology, Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Research Institute of Stomatology, Nanjing University, Nanjing, China
| | - Tianrui Yang
- Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Research Institute of Stomatology, Nanjing University, Nanjing, China
- Central Laboratory of Stomatology, Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Research Institute of Stomatology, Nanjing University, Nanjing, China
| | - Chenxu Wang
- Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Research Institute of Stomatology, Nanjing University, Nanjing, China
- Central Laboratory of Stomatology, Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Research Institute of Stomatology, Nanjing University, Nanjing, China
| | - Houxuan Li
- Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Research Institute of Stomatology, Nanjing University, Nanjing, China
| | - Lang Lei
- Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Research Institute of Stomatology, Nanjing University, Nanjing, China
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He W, Fu Y, Yao S, Huang L. Programmed cell death of periodontal ligament cells. J Cell Physiol 2023; 238:1768-1787. [PMID: 37566596 DOI: 10.1002/jcp.31091] [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: 05/22/2023] [Revised: 06/30/2023] [Accepted: 07/11/2023] [Indexed: 08/13/2023]
Abstract
The periodontal ligament is a crucial tissue that provides support to the periodontium. Situated between the alveolar bone and the tooth root, it consists primarily of fibroblasts, cementoblasts, osteoblasts, osteoclasts, periodontal ligament stem cells (PDLSCs), and epithelial cell rests of Malassez. Fibroblasts, cementoblasts, osteoblasts, and osteoclasts are functionally differentiated cells, whereas PDLSCs are undifferentiated mesenchymal stem cells. The dynamic development of these cells is intricately linked to periodontal changes and homeostasis. Notably, the regulation of programmed cell death facilitates the clearance of necrotic tissue and plays a pivotal role in immune response. However, it also potentially contributes to the loss of periodontal supporting tissues and root resorption. These findings have significant implications for understanding the occurrence and progression of periodontitis, as well as the mechanisms underlying orthodontic root resorption. Further, the regulation of periodontal ligament cell (PDLC) death is influenced by both systemic and local factors. This comprehensive review focuses on recent studies reporting the mechanisms of PDLC death and related factors.
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Affiliation(s)
- Wei He
- Department of Orthodontics, College of Stomatology, Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences, Chongqing, China
- Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, China
| | - Yu Fu
- Department of Orthodontics, College of Stomatology, Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences, Chongqing, China
- Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, China
| | - Song Yao
- Department of Orthodontics, College of Stomatology, Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences, Chongqing, China
- Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, China
| | - Lan Huang
- Department of Orthodontics, College of Stomatology, Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences, Chongqing, China
- Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, China
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Effect of micro-osteoperforations on the gene expression profile of the periodontal ligament of orthodontically moved human teeth. Clin Oral Investig 2021; 26:1985-1996. [PMID: 34499218 DOI: 10.1007/s00784-021-04178-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Accepted: 09/02/2021] [Indexed: 10/20/2022]
Abstract
OBJECTIVES This study aimed to evaluate the effect of micro-osteoperforations (MOPs) on the gene expression profile of the periodontal ligament (PDL) of orthodontically moved teeth. MATERIALS AND METHODS Fifteen participants were randomly assigned into two groups: tooth movement only (Tr1, n = 7) and tooth movement supplemented with MOPs (Tr2, n = 8). In each subject, orthodontic tooth movement (OTM) was performed on premolar in one side, while no force was applied on contralateral premolar (Unt, n = 15). Seven days after loading, premolars were extracted for orthodontic reasons. RNA extraction from PDL and subsequent RNA-sequencing were performed. False discovery rates (Padj < 0.05) and log2 fold change (+ / - 1.5) thresholds were used to identify sets of differentially expressed genes (DEGs) among the groups. DEGs were analyzed with gene ontology enrichment, KEGG, and network analysis. RESULTS Three hundred thirty-one DEGs were found between Tr1 and Unt, and 356 between Tr2 and Unt. Although, there were no significantly DEGs between Tr2 and Tr1, DEGs identified exclusively in Tr1 vs. Unt were different from those identified exclusively in Tr2 vs. Unt. In Tr1, genes were related to bone metabolism processes, such as osteoclast and osteoblast differentiation. In Tr2, genes were associated to inflammation processes, like inflammatory and immune responses, and cellular response to tumor necrosis factor. CONCLUSIONS MOPs do not significantly alter the PDL gene expression profile of orthodontically moved human teeth. This study provides for the first time evidence on the whole PDL gene expression profiles associated to OTM in humans. Novel biomarkers for OTM are suggested for additional research. Clinical relevance The identified biomarkers provide new insights into the molecular mechanisms that would occur when OTM is supplemented with MOPs. These markers are expected to be useful in the near future for the application of personalized strategies related to the OTM.
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Yao W, Gong Y, Zhao B, Li R. Combined effects of cyclic stretch and TNF-α on the osteogenic differentiation in MC3T3-E1 cells. Arch Oral Biol 2021; 130:105222. [PMID: 34358809 DOI: 10.1016/j.archoralbio.2021.105222] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Revised: 07/16/2021] [Accepted: 07/29/2021] [Indexed: 01/19/2023]
Abstract
OBJECTIVE The study aimed to investigate the combined effects of cyclic stretch and tumor necrosis factor-alpha (TNF-α) on the osteogenic differentiation of MC3T3-E1 cells and the role of the nuclear factor-kappaB (NF-κB) signaling pathway in this process. DESIGN MC3T3-E1 cells were treated with TNF-α (0.5 and 10 ng/mL) and cyclically stretched using the Flexcell tension system 4000 with 12 % elongation for 12 h. Furthermore, to explore which cytokines might be regulated by the NF-κB signaling pathway in osteogenic differentiation, the cells were pre-treated with NF-κB inhibitor, pyrrolidine dithiocarbamate (PDTC), and then cyclically stretched for 12 h in the presence of 10 ng/mL of TNF-α. RT-PCR and western blot were utilized to detect the expression of type Ⅰ collagen (COL1), osteocalcin (OCN), runt-related transcription factor 2 (Runx2), alkaline phosphatase (ALP), osteoprotegerin (OPG), receptor activator of NF-κB ligand (RANKL), NF-κB, and phosphorylated NF-κB (p-NF-κB) at gene and protein levels. RESULTS Cyclic stretch alone increased the expression of COL1, OCN, Runx2, ALP, and OPG, decreasing the expression of RANKL and the RANKL/OPG ratio. The upregulation or downregulation induced by cyclic stretch were restrained in the presence of TNF-α. The p-NF-κB/NF-κB ratio increased at any stimulation. Inhibition of NF-κB signaling pathway restrained the expression variations of COL1, OCN, ALP, OPG, and RANKL induced by TNF-α combined with cyclic stretch. CONCLUSION The results indicated that TNF-α inhibited the osteogenic differentiation of MC3T3-E1 cells induced by cyclic stretch and NF-κB signaling pathway might play a role in this process.
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Affiliation(s)
- Wei Yao
- Shanxi Medical University School and Hospital of Stomatology, Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Taiyuan 030001, China.
| | - Yuqing Gong
- Shanxi Medical University School and Hospital of Stomatology, Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Taiyuan 030001, China
| | - Bin Zhao
- Shanxi Medical University School and Hospital of Stomatology, Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Taiyuan 030001, China
| | - Ran Li
- Shanxi Medical University School and Hospital of Stomatology, Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Taiyuan 030001, China
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Compressive force strengthened the pro-inflammatory effect of zoledronic acid on il-1ß stimulated human periodontal fibroblasts. Clin Oral Investig 2020; 25:3453-3461. [PMID: 33169272 DOI: 10.1007/s00784-020-03667-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Accepted: 10/28/2020] [Indexed: 10/23/2022]
Abstract
OBJECTIVES The number of patients in dentistry taking bisphosphonates (BP) increases every year. There are only little data about the influence of biomechanical stress due to orthodontic treatment and periodontal inflammation in BP patients. This study focused on the effects of the induced inflammation by IL-1ß in compressed human periodontal ligament fibroblasts (HPdLF) exposed to the nitrogen-containing BP zoledronate in vitro. MATERIALS AND METHODS HPdLF were incubated with 5 μmol/l zoledronate and 10 ng/ml IL-1ß for 48 h. In the last 3 h, cells were exposed to a compressive, centrifugal force of 34.9 g/cm2. Cell viability was analyzed directly after the compressive force by MTT assay. Gene expression of COX-2 and IL-6 was investigated using quantitative qRT-PCR. PGE-2 and IL-6 protein secretion were measured via ELISA. RESULTS The cell viability of HPdLF was not affected. Without inflammatory pre-stimulation, COX-2 expression was increased by compression and zoledronate. IL-6 expression was increased under compression. On secretion level, the combination of compression and zoledronate induced a slightly increase of IL-6 secretion. In contrast, inflammatory pre-stimulation strengthened the compressive upregulation of COX-2, as well as induced a higher PGE-2 secretion. Further addition of zoledronate to pre-stimulated cells additionally strengthened the compression-induced upregulation of COX-2 and IL-6 expression as well as protein secretion compared to all other groups. CONCLUSIONS Biomechanical stress might trigger a pro-inflammatory potential of BP further enhanced in the presence of an inflammatory pre-stimulation. CLINICAL RELEVANCE To prevent excessive host inflammatory responses, occlusal overloading and mechanical stress due to orthodontic treatment should be avoided in BP patients with untreated periodontitis.
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Ruiz-Heiland G, Yong JW, von Bremen J, Ruf S. Leptin reduces in vitro cementoblast mineralization and survival as well as induces PGE2 release by ERK1/2 commitment. Clin Oral Investig 2020; 25:1933-1944. [PMID: 32820432 PMCID: PMC7965856 DOI: 10.1007/s00784-020-03501-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Accepted: 08/05/2020] [Indexed: 12/18/2022]
Abstract
Objectives Juvenile obesity is a complex clinical condition that is present more and more frequently in the daily orthodontic practice. Over-weighted patients have an impaired bone metabolism, due in part to their increased levels of circulating adipokines. Particularly, leptin has been reported to play a key role in bone physiology. Leptin is ubiquitously present in the body, including blood, saliva, and crevicular fluid. If, and to what extent, it could influence the reaction of cementoblasts during orthodontic-induced forces is yet unknown. Material and methods OCCM-30 cementoblasts were cultivated under compressive forces using different concentrations of leptin. The expression of ObR, Runx-2, Osteocalcin, Rank-L, Sost, Caspase 3, 8, and 9 were analyzed by RT-PCR. Western blots were employed for protein analysis. The ERK1/2 antagonist FR180204 (Calbiochem) was used and cPLA2 activation, PGE2, and cytochrome C release were further evaluated. Results In vitro, when compressive forces are applied, leptin promotes ERK1/2 phosphorylation, as well as upregulates PGE2 and caspase 3 and caspase 9 on OCCM cells. Blockade of ERK1/2 impairs leptin-induced PGE2 secretion and reduced caspase 3 and caspase 9 expression. Conclusions Leptin influences the physiological effect of compressive forces on cementoblasts, exerting in vitro a pro-inflammatory and pro-apoptotic effect. Clinical relevance Our findings indicate that leptin exacerbates the physiological effect of compressive forces on cementoblasts promoting the release of PGE2 and increases the rate of cell apoptosis, and thus, increased levels of leptin may influence the inflammatory response during orthodontically induced tooth movement.
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Affiliation(s)
- G Ruiz-Heiland
- Department of Orthodontics, University of Giessen, Schlangenzahl 14, 35392, Giessen, Germany.
| | - J W Yong
- Department of Orthodontics, University of Giessen, Schlangenzahl 14, 35392, Giessen, Germany
| | - J von Bremen
- Department of Orthodontics, University of Giessen, Schlangenzahl 14, 35392, Giessen, Germany
| | - S Ruf
- Department of Orthodontics, University of Giessen, Schlangenzahl 14, 35392, Giessen, Germany
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Zhang L, Sun H, Zhang J, Song F, Huang L, Cao Z, Huang C. Yes-associated protein promotes tumour necrosis factor α-treated cementoblast mineralization partly by inactivating NF-κB pathway. J Cell Mol Med 2020; 24:7939-7948. [PMID: 32510818 PMCID: PMC7348144 DOI: 10.1111/jcmm.15426] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 12/14/2019] [Accepted: 05/08/2020] [Indexed: 12/22/2022] Open
Abstract
Cementum regeneration, as one of the most difficult challenges of periodontal regeneration, is influenced by inflammatory factors. Inflammation may hamper or promote periodontal tissue repair under different circumstances, as it is found to do in dentin‐pulp complex and bone tissue. Our team demonstrated that YAP promotes mineralization of OCCM, a cementoblast cell line. However, the effect of YAP on its mineralization under inflammatory microenvironment is unclear. In this study, cementogenesis in vitro was up‐regulated after transient TNF‐α treatment for 30 minutes. YAP expression also was increased by TNF‐α treatment. YAP overexpression promoted OCCM mineralization after the cells were transiently treated with TNF‐α because YAP overexpression inhibited NF‐κB pathway activity, while YAP knockdown elevated it. The inhibited mineralization potential and activated NF‐κB pathway activity by YAP knockdown also were partly rescued by the application of the NF‐κB inhibitor Bay 11‐7082. These results demonstrated that YAP plays a positive role in the mineralization of TNF‐α transiently treated cementoblast, partly by inhibiting the NF‐κB pathway activity.
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Affiliation(s)
- Lu Zhang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Hualing Sun
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Jing Zhang
- Department of Periodontics, Yantai Stomatological Hospital, Yantai, China
| | - Fangfang Song
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Liyuan Huang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Zhengguo Cao
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Cui Huang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
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Grimm S, Wolff E, Walter C, Pabst AM, Mundethu A, Jacobs C, Wehrbein H, Jacobs C. Influence of clodronate and compressive force on IL-1ß-stimulated human periodontal ligament fibroblasts. Clin Oral Investig 2019; 24:343-350. [PMID: 31102041 DOI: 10.1007/s00784-019-02930-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Accepted: 04/30/2019] [Indexed: 02/07/2023]
Abstract
OBJECTIVES The aim of this study was to investigate in vitro the effect of clodronate on interleukin-1ß (IL-1ß)-stimulated human periodontal ligament fibroblasts (HPdLFs) with the focus on inflammatory factors of orthodontic tooth movement with and without compressive force. MATERIALS AND METHODS HPdLFs were incubated with 5 μM clodronate and 10 ng/mL IL-1ß. After 48 h, cells were exposed to 3 h of compressive force using a centrifuge. The gene expression of cyclooxygenase-2 (COX-2), interleukin-6 (IL-6), matrix metalloproteinase 8 (MMP-8), and the tissue inhibitor of MMP (TIMP-1) was analyzed using RT-PCR. Prostaglandin E2 (PGE-2), IL-6, and TIMP-1 protein syntheses were quantified via ELISA. RESULTS Compressive force and IL-1ß induced an overexpression of COX-2 gene expression (61.8-fold; p < 0.05 compared with control), diminished by clodronate (41.1-fold; p < 0.05 compared with control). Clodronate slowed down the compression and IL-1ß induced IL-6 gene expression (161-fold vs. 85.6-fold; p < 0.05 compared with control). TNF-α was only slightly affected without statistical significance. Clodronate reduced IL-1ß-stimulated MMP-8 expression with and without compressive force. TIMP-1 on gene and protein level was downregulated in all groups. Analyzing the MMP-8/TIMP-1 ratio, the highest ratio was detected in IL-1ß-stimulated HPdLFs with compressive force (21.2-fold; p < 0.05 compared with control). Clodronate diminished IL-1ß-induced upregulation of MMP-8/TIMP-1 ratio with (11.5-fold; p < 0.05 compared with control) and without (12.5-fold; p < 0.05 compared with control) compressive force. CONCLUSION Our study demonstrates a slightly anti-inflammatory effect by clodronate under compressive force in vitro. Additionally, the periodontal remodeling presented by the MMP-8/TIMP-1 ratio seems to be diminished by clodronate. CLINICAL RELEVANCE Reduction of pro-inflammatory factors and reduction of periodontal remodeling might explain reduced orthodontic tooth movement under clodronate intake.
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Affiliation(s)
- Sarah Grimm
- Department of Orthodontics, University Medical Centre, Johannes Gutenberg University Mainz, Augustusplatz 2, 55131, Mainz, Germany.
| | - Eva Wolff
- Department of Orthodontics, University Medical Centre, Johannes Gutenberg University Mainz, Augustusplatz 2, 55131, Mainz, Germany
| | - Christian Walter
- Department of Oral and Maxillofacial Surgery, University Medical Centre, Johannes Gutenberg University Mainz, Augustusplatz 2, 55131, Mainz, Germany
| | - Andreas M Pabst
- Department of Oral and Maxillofacial Surgery, University Medical Centre, Johannes Gutenberg University Mainz, Augustusplatz 2, 55131, Mainz, Germany
| | - Ambili Mundethu
- Department of Orthodontics, University Medical Centre, Johannes Gutenberg University Mainz, Augustusplatz 2, 55131, Mainz, Germany
| | - Cornelius Jacobs
- Department of Traumatology, University of Bonn, Sigmund-Freud-Straße 25, 53127, Bonn, Germany
| | - Heiner Wehrbein
- Department of Orthodontics, University Medical Centre, Johannes Gutenberg University Mainz, Augustusplatz 2, 55131, Mainz, Germany
| | - Collin Jacobs
- Department of Orthodontics, University of Jena, An der Alten Post 4, 07743, Jena, Germany
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Li S, Li F, Zou S, Zhang L, Bai Y. PTH1R signalling regulates the mechanotransduction process of cementoblasts under cyclic tensile stress. Eur J Orthod 2019; 40:537-543. [PMID: 29394342 DOI: 10.1093/ejo/cjx099] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Objective To investigate the regulatory role of type I parathyroid hormone receptor (PTH1R) signalling in the mechanotransduction process of cementoblasts under cyclic tensile stress (CTS). Materials and methods Immortalized cementoblast cell line OCCM-30 were employed and subjected to cyclic tensile strain applied by a four-point bending system. The expression of PTHrP and PTH1R, as well as cementoblastic transcription factor Runx-2, Osterix, and extracellular matrix protein COL-1 and OPN were assessed by quantitative real-time polymerase chain reaction and western blot analysis. PTH1R expression was knocked down by siPTH1R transfection, and the alteration of cementoblastic biomarkers expression was examined to evaluate the function of PTH1R. Furthermore, to investigate possible downstream molecules, expression of signal molecule ERK1/2 with or without siPTH1R transfection, and the effect of ERK inhibitor PD98059 on the expression of cementoblastic biomarkers was also examined. Results Cyclic tensile strain elevated the expression of PTHrP and PTH1R, as well as cementoblastic biomarkers Runx-2, Osterix, COL-1, and OPN in a time-dependent manner, which was inhibited by siPTH1R transfection. The expression of phosphorylated ERK1/2 was upregulated time-dependently under cyclic stretch, which was also inhibited by siPTH1R transfection, and pretreatment of p-ERK1/2 inhibitor PD98059 undermined the increase of Runx-2, Osterix, COL-1, and OPN prominently. Conclusion The findings of the present study indicate that PTH1R signalling plays a regulatory role in the CTS induced cementoblastic differentiation in mature cementoblasts, and ERK1/2 is essentially involved as a downstream intracellular signal molecule in this mechanotransduction process.
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Affiliation(s)
- Shengnan Li
- Institute of Dental Research and Department of Orthodontics, Beijing Stomatological Hospital, School of Stomatology, Capital Medical University, Beijing, P.R. China
| | - Fan Li
- Institute of Dental Research and Department of Orthodontics, Beijing Stomatological Hospital, School of Stomatology, Capital Medical University, Beijing, P.R. China
| | - Shujuan Zou
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, P.R. China
| | - Li Zhang
- Institute of Dental Research and Department of Orthodontics, Beijing Stomatological Hospital, School of Stomatology, Capital Medical University, Beijing, P.R. China
| | - Yuxing Bai
- Institute of Dental Research and Department of Orthodontics, Beijing Stomatological Hospital, School of Stomatology, Capital Medical University, Beijing, P.R. China
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Minato Y, Yamaguchi M, Shimizu M, Kikuta J, Hikida T, Hikida M, Suemitsu M, Kuyama K, Kasai K. Effect of caspases and RANKL induced by heavy force in orthodontic root resorption. Korean J Orthod 2018; 48:253-261. [PMID: 30003059 PMCID: PMC6041455 DOI: 10.4041/kjod.2018.48.4.253] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Revised: 11/10/2017] [Accepted: 12/08/2017] [Indexed: 11/21/2022] Open
Abstract
Objective Orthodontic root resorption (ORR) due to orthodontic tooth movement is a difficult treatment-related adverse event. Caspases are important effector molecules for apoptosis. At present, little is known about the mechanisms underlying ORR and apoptosis in the cementum. The aim of the present in vivo study was to investigate the expression of tartrate-resistant acid phosphatase (TRAP), caspase 3, caspase 8, and receptor activator of nuclear factor kappa-B ligand (RANKL) in the cementum in response to a heavy or an optimum orthodontic force. Methods The maxillary molars of male Wistar rats were subjected to an orthodontic force of 10 g or 50 g using a closed coil spring. The rats were sacrificed each experimental period on days 1, 3, 5, and 7 after orthodontic force application. And the rats were subjected to histopathological and immunohistochemical analyses. Results On day 7 for the 50-g group, hematoxylin and eosin staining revealed numerous root resorption lacunae with odontoclasts on the root, while immunohistochemistry showed increased TRAP- and RANKL-positive cells. Caspase 3- and caspase 8-positive cells were increased on the cementum surfaces in the 50-g group on days 3 and 5. Moreover, the number of caspase 3- and caspase 8-positive cells and RANKL-positive cells was significantly higher in the 50-g group than in the 10-g group. Conclusions In our rat model, ORR occurred after apoptosis was induced in the cementum by a heavy orthodontic force. These findings suggest that apoptosis of cementoblasts is involved in ORR.
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Affiliation(s)
- Yukari Minato
- Department of Orthodontics, Nihon University School of Dentistry at Matsudo, Chiba, Japan
| | - Masaru Yamaguchi
- Department of Orthodontics, Nihon University School of Dentistry at Matsudo, Chiba, Japan
| | - Mami Shimizu
- Department of Orthodontics, Nihon University School of Dentistry at Matsudo, Chiba, Japan
| | - Jun Kikuta
- Department of Orthodontics, Nihon University School of Dentistry at Matsudo, Chiba, Japan
| | - Takuji Hikida
- Department of Orthodontics, Nihon University School of Dentistry at Matsudo, Chiba, Japan
| | - Momoko Hikida
- Department of Orthodontics, Nihon University School of Dentistry at Matsudo, Chiba, Japan
| | - Masaaki Suemitsu
- Department of Oral Pathology, Nihon University School of Dentistry at Matsudo, Chiba, Japan
| | - Kayo Kuyama
- Department of Oral Pathology, Nihon University School of Dentistry at Matsudo, Chiba, Japan
| | - Kazutaka Kasai
- Department of Orthodontics, Nihon University School of Dentistry at Matsudo, Chiba, Japan
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Axin1 up-regulated 1 accelerates stress-induced cardiomyocytes apoptosis through activating Wnt/β-catenin signaling. Exp Cell Res 2017; 359:441-448. [DOI: 10.1016/j.yexcr.2017.08.027] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Revised: 08/17/2017] [Accepted: 08/18/2017] [Indexed: 12/13/2022]
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12
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Yao W, Li X, Zhao B, Du G, Feng P, Chen W. Combined effect of TNF-α and cyclic stretching on gene and protein expression associated with mineral metabolism in cementoblasts. Arch Oral Biol 2017; 73:88-93. [DOI: 10.1016/j.archoralbio.2016.09.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Revised: 08/14/2016] [Accepted: 09/29/2016] [Indexed: 10/20/2022]
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13
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Korb K, Katsikogianni E, Zingler S, Daum E, Lux CJ, Hohenstein A, Erber R. Inhibition of AXUD1 attenuates compression-dependent apoptosis of cementoblasts. Clin Oral Investig 2016; 20:2333-2341. [DOI: 10.1007/s00784-016-1740-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Accepted: 01/26/2016] [Indexed: 01/07/2023]
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14
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Compression of human primary cementoblasts leads to apoptosis. J Orofac Orthop 2014; 75:430-45. [DOI: 10.1007/s00056-014-0237-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Accepted: 03/04/2014] [Indexed: 12/31/2022]
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