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Wang S, Ko CC, Chung MK. Nociceptor mechanisms underlying pain and bone remodeling via orthodontic forces: toward no pain, big gain. Front Pain Res (Lausanne) 2024; 5:1365194. [PMID: 38455874 PMCID: PMC10917994 DOI: 10.3389/fpain.2024.1365194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Accepted: 02/12/2024] [Indexed: 03/09/2024] Open
Abstract
Orthodontic forces are strongly associated with pain, the primary complaint among patients wearing orthodontic braces. Compared to other side effects of orthodontic treatment, orthodontic pain is often overlooked, with limited clinical management. Orthodontic forces lead to inflammatory responses in the periodontium, which triggers bone remodeling and eventually induces tooth movement. Mechanical forces and subsequent inflammation in the periodontium activate and sensitize periodontal nociceptors and produce orthodontic pain. Nociceptive afferents expressing transient receptor potential vanilloid subtype 1 (TRPV1) play central roles in transducing nociceptive signals, leading to transcriptional changes in the trigeminal ganglia. Nociceptive molecules, such as TRPV1, transient receptor potential ankyrin subtype 1, acid-sensing ion channel 3, and the P2X3 receptor, are believed to mediate orthodontic pain. Neuropeptides such as calcitonin gene-related peptides and substance P can also regulate orthodontic pain. While periodontal nociceptors transmit nociceptive signals to the brain, they are also known to modulate alveolar bone remodeling in periodontitis. Therefore, periodontal nociceptors and nociceptive molecules may contribute to the modulation of orthodontic tooth movement, which currently remains undetermined. Future studies are needed to better understand the fundamental mechanisms underlying neuroskeletal interactions in orthodontics to improve orthodontic treatment by developing novel methods to reduce pain and accelerate orthodontic tooth movement-thereby achieving "big gains with no pain" in clinical orthodontics.
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Affiliation(s)
- Sheng Wang
- Division of Orthodontics, College of Dentistry, The Ohio State University, Columbus, OH, United States
| | - Ching-Chang Ko
- Division of Orthodontics, College of Dentistry, The Ohio State University, Columbus, OH, United States
| | - Man-Kyo Chung
- Department of Neural and Pain Sciences, School of Dentistry, University of Maryland Baltimore, Baltimore, MD, United States
- Center to Advance Chronic Pain Research, University of Maryland Baltimore, Baltimore, MD, United States
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2
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Jiang P, Zhang L, Liu X, Ye C, Zhu P, Tan T, Wang D, Wang Y. Tuning oxidant and antioxidant activities of ceria by anchoring copper single-site for antibacterial application. Nat Commun 2024; 15:1010. [PMID: 38307902 PMCID: PMC10837451 DOI: 10.1038/s41467-024-45255-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Accepted: 01/18/2024] [Indexed: 02/04/2024] Open
Abstract
The reaction system of hydrogen peroxide (H2O2) catalyzed by nanozyme has a broad prospect in antibacterial treatment. However, the complex catalytic activities of nanozymes lead to multiple pathways reacting in parallel, causing uncertain antibacterial results. New approach to effectively regulate the multiple catalytic activities of nanozyme is in urgent need. Herein, Cu single site is modified on nanoceria with various catalytic activities, such as peroxidase-like activity (POD) and hydroxyl radical antioxidant capacity (HORAC). Benefiting from the interaction between coordinated Cu and CeO2 substrate, POD is enhanced while HORAC is inhibited, which is further confirmed by density functional theory (DFT) calculations. Cu-CeO2 + H2O2 system shows good antibacterial properties both in vitro and in vivo. In this work, the strategy based on the interaction between coordinated metal and carrier provides a general clue for optimizing the complex activities of nanozymes.
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Affiliation(s)
- Peng Jiang
- Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Ludan Zhang
- Center of Digital Dentistry/Department of Prosthodontics, National Center of Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, NHC Research Center of Engineering and Technology for Computerized Dentistry, Peking University School and Hospital of Stomatology, Beijing, 100081, China
| | - Xiaolong Liu
- Laboratory of Theoretical and Computational Nanoscience, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Chinese Academy of Sciences, Beijing, 100190, China
| | - Chenliang Ye
- Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Peng Zhu
- Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Ting Tan
- Laboratory of Theoretical and Computational Nanoscience, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Chinese Academy of Sciences, Beijing, 100190, China.
| | - Dingsheng Wang
- Department of Chemistry, Tsinghua University, Beijing, 100084, China.
| | - Yuguang Wang
- Center of Digital Dentistry/Department of Prosthodontics, National Center of Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, NHC Research Center of Engineering and Technology for Computerized Dentistry, Peking University School and Hospital of Stomatology, Beijing, 100081, China.
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Khasanov R, Svoboda D, Tapia-Laliena MÁ, Kohl M, Maas-Omlor S, Hagl CI, Wessel LM, Schäfer KH. Muscle hypertrophy and neuroplasticity in the small bowel in short bowel syndrome. Histochem Cell Biol 2023; 160:391-405. [PMID: 37395792 PMCID: PMC10624713 DOI: 10.1007/s00418-023-02214-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/24/2023] [Indexed: 07/04/2023]
Abstract
Short bowel syndrome (SBS) is a severe, life-threatening condition and one of the leading causes of intestinal failure in children. Here we were interested in changes in muscle layers and especially in the myenteric plexus of the enteric nervous system (ENS) of the small bowel in the context of intestinal adaptation. Twelve rats underwent a massive resection of the small intestine to induce SBS. Sham laparotomy without small bowel transection was performed in 10 rats. Two weeks after surgery, the remaining jejunum and ileum were harvested and studied. Samples of human small bowel were obtained from patients who underwent resection of small bowel segments due to a medical indication. Morphological changes in the muscle layers and the expression of nestin, a marker for neuronal plasticity, were studied. Following SBS, muscle tissue increases significantly in both parts of the small bowel, i.e., jejunum and ileum. The leading pathophysiological mechanism of these changes is hypertrophy. Additionally, we observed an increased nestin expression in the myenteric plexus in the remaining bowel with SBS. Our human data also showed that in patients with SBS, the proportion of stem cells in the myenteric plexus had risen by more than twofold. Our findings suggest that the ENS is tightly connected to changes in intestinal muscle layers and is critically involved in the process of intestinal adaptation to SBS.
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Affiliation(s)
- Rasul Khasanov
- Department of Pediatric Surgery, University Hospital Mannheim, Medical Faculty Mannheim of Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany.
| | - Daniel Svoboda
- Department of Pediatric Surgery, University Hospital Mannheim, Medical Faculty Mannheim of Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany
| | - María Ángeles Tapia-Laliena
- Department of Pediatric Surgery, University Hospital Mannheim, Medical Faculty Mannheim of Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany
| | - Martina Kohl
- Department of Pediatric and Adolescent Medicine, University Medical Center Schleswig-Holstein, Ratzeburger Allee 160, 23538, Lübeck, Germany
| | - Silke Maas-Omlor
- Enteric Nervous System Group, University of Applied Sciences Kaiserslautern, Amerikastrasse 1, 66482, Zweibrücken, Germany
| | - Cornelia Irene Hagl
- Carl Remigius Medical School, Charles de Gaulle Str. 2, 81737, Munich, Germany
| | - Lucas M Wessel
- Department of Pediatric Surgery, University Hospital Mannheim, Medical Faculty Mannheim of Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany
| | - Karl-Herbert Schäfer
- Enteric Nervous System Group, University of Applied Sciences Kaiserslautern, Amerikastrasse 1, 66482, Zweibrücken, Germany
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Zhan C, Huang M, Zeng J, Chen T, Lu Y, Chen J, Li X, Yin L, Yang X, Hou J. Irritation of Dental Sensory Nerves Promotes the Occurrence of Pulp Calcification. J Endod 2023; 49:402-409. [PMID: 36758674 DOI: 10.1016/j.joen.2023.01.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 12/27/2022] [Accepted: 01/05/2023] [Indexed: 02/10/2023]
Abstract
INTRODUCTION Pulp calcification (PC) often appears in strong association with nerve fiber bundles, which indicates the important role of dental nerves in the formation of PC. Additionally, given that sensory nerves and calcitonin gene-related peptide (CGRP) secreted from sensory nerve fibers are involved in physiological and pathological bone formation, we aimed to determine whether chronic irritation of sensory nerves can promote the occurrence of PC. METHODS A sensory nerve irritation rat model was established via ligation of the inferior alveolar nerve (IAN), and face grooming behavior was analyzed as a measure of pain sensation. Two months post-surgery, PC was determined by imaging and histologic analyses. RESULTS Rats in the IAN-chronic constriction injury (IAN-CCI) group showed spontaneous pain-associated behavior after the operations and pain tolerance on the 60th postoperative day. The imaging and histological analysis showed more calcified particles in the IAN-innervated first and second molars after day 60 of the dental sensory nerve irritation. These calcified masses had a dentin-like structure that contained sparse, irregularly oriented tubules. Compared to the control and sham groups, the odontoblasts located in the periphery of radicular pulp aligned along a thicker layer of predentin; which expressed more nestin with longer and stouter processes in the IAN-CCI group. Additionally, more CGRP-positive nerves were observed in the IAN-CCI group. CONCLUSIONS Irritation of sensory nerves promotes PC formation, and the increased density of CGRP-immunolabeled fibers probably contributes to this process. This highlights the significance of dental sensory nerves in the formation of PC.
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Affiliation(s)
- Chaoning Zhan
- Department of Stomatology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Minchun Huang
- Department of Stomatology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Jiao Zeng
- Department of Stomatology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Ting Chen
- Department of Stomatology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Yanli Lu
- Department of Stomatology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Junyang Chen
- Department of Stomatology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Xinzhu Li
- Department of Stomatology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Linying Yin
- Department of Stomatology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Xiaojun Yang
- Department of Stomatology, Nanfang Hospital, Southern Medical University, Guangzhou, China.
| | - Jin Hou
- Department of Stomatology, Nanfang Hospital, Southern Medical University, Guangzhou, China.
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Zhang X, Xiong Q, Lin W, Wang Q, Zhang D, Xu R, Zhou X, Zhang S, Peng L, Yuan Q. Schwann Cells Contribute to Alveolar Bone Regeneration by Promoting Cell Proliferation. J Bone Miner Res 2023; 38:119-130. [PMID: 36331097 DOI: 10.1002/jbmr.4735] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 10/27/2022] [Accepted: 11/01/2022] [Indexed: 11/06/2022]
Abstract
The plasticity of Schwann cells (SCs) following nerve injury is a critical feature in the regeneration of peripheral nerves as well as surrounding tissues. Here, we show a pivotal role of Schwann cell-derived cells in alveolar bone regeneration through the specific ablation of proteolipid protein 1 (Plp)-expressing cells and the transplantation of teased nerve fibers and associated cells. With inducible Plp specific genetic tracing, we observe that Plp+ cells migrate into wounded alveolar defect and dedifferentiate into repair SCs. Notably, these cells barely transdifferentiate into osteogenic cell lineage in both SCs tracing model and transplant model, but secret factors to enhance the proliferation of alveolar skeletal stem cells (aSSCs). As to the mechanism, this effect is associated with the upregulation of extracellular matrix (ECM) receptors and receptor tyrosine kinases (RTKs) signaling and the downstream extracellular signal-regulated kinase (ERK)/mitogen-activated protein kinase (MAPK) pathway and the phosphoinositide 3-kinase-protein kinase B (PI3K-Akt) pathway. Collectively, our data demonstrate that SCs dedifferentiate after neighboring alveolar bone injury and contribute to bone regeneration mainly by a paracrine function. © 2022 American Society for Bone and Mineral Research (ASBMR).
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Affiliation(s)
- Xiaohan Zhang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Qiuchan Xiong
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Weimin Lin
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Qian Wang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Danting Zhang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Ruoshi Xu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Xinyi Zhou
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Shiwen Zhang
- Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Lin Peng
- Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Quan Yuan
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu, China
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Sheng Z, Zheng F, Li J, Wang Y, Du Y, Liu X, Yu X. Denervation delays initial bone healing of rat tooth extraction socket. Odontology 2022:10.1007/s10266-022-00773-x. [DOI: 10.1007/s10266-022-00773-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Accepted: 11/20/2022] [Indexed: 12/15/2022]
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Jiao M, Zhang P, Yu X, Sun P, Liu M, Qiao Y, Pan K. Osteoprotegerin/receptor activator of nuclear factor‑κB ligand are involved in periodontitis‑promoted vascular calcification. Exp Ther Med 2022; 24:512. [PMID: 35813311 PMCID: PMC9260016 DOI: 10.3892/etm.2022.11439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 05/23/2022] [Indexed: 11/23/2022] Open
Abstract
The present study explored the potential role of osteoprotegerin (OPG)/receptor activator of nuclear factor-κB (RANK)/receptor activator of nuclear factor-κB ligand (RANKL) in promoting vascular calcification by periodontitis. Thirty-six male Wistar rats were randomly assigned to four groups to establish animal models as follows: the sham group (group C), vascular calcification group (group VDN), periodontitis group (group CP), and test group (group CP+VDN). After eight weeks, all the rats were sacrificed. The periodontal and vascular calcification indices were detected. Quantitative polymerase chain reaction (qPCR), immunohistochemistry, western blot analysis, and enzyme-linked immunosorbent assay (ELISA) were used to quantify OPG/RANK/RANKL expression in vascular tissue and serum. Protein expression analyses revealed the expression of OPG and RANKL in the vascular tissues of the four groups. The expression of OPG in group C was the highest, which was similar to group CP+VDN, and the expression of OPG in groups CP and VDN were lower. However, the expression of RANKL was inversely correlated with OPG, and the ratio of RANKL/OPG was also higher in groups CP and VDN than that in groups C and CP+VDN. In conclusion, OPG/RANK/RANKL may play an essential role in the promotion of vascular calcification by periodontitis. However, the expression levels of OPG and RANKL were not simply superimposed when periodontitis and vascular calcification co-existed.
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Affiliation(s)
- Mengyu Jiao
- Department of Stomatology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, P.R. China
| | - Pengmei Zhang
- Department of Stomatology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, P.R. China
| | - Xinbo Yu
- Department of Stomatology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, P.R. China
| | - Pei Sun
- Department of Stomatology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, P.R. China
| | - Meiwei Liu
- Department of Stomatology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, P.R. China
| | - Yanya Qiao
- Department of Stomatology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, P.R. China
| | - Keqing Pan
- Department of Stomatology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, P.R. China
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Moro MG, Oliveira MDS, Santana MM, de Jesus FN, Feitosa K, Teixeira SA, Franco GCN, Spolidorio LC, Muscará MN, Holzhausen M. Leukotriene receptor antagonist reduces inflammation and alveolar bone loss in a rat model of experimental periodontitis. J Periodontol 2021; 92:e84-e93. [PMID: 33491771 DOI: 10.1002/jper.20-0718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 12/17/2020] [Accepted: 01/18/2021] [Indexed: 11/10/2022]
Abstract
BACKGROUND Leukotrienes (LTs) participate in the process of tissue damage in periodontal disease by leukocyte chemotaxis and osteoclastic activation. The activation of Cysteinyl-LT receptor is associated with increased expression of proinflammatory molecules and osteoclastogenesis. However, its implications on periodontal disease progression have not been studied. The present study evaluated the effect of the cysteinyl-LT receptor antagonist (montelukast [MT]) on ligature-induced experimental periodontitis (EP) in rats. METHODS Adult male Wistar rats were subjected to bilateral ligature-induced periodontitis and orally treated with MT (at doses of 10 or 30 mg/kg/d, MT10, and MT30, respectively). Sham animals had the ligatures immediately removed and received placebo treatment. Sets of animals were euthanized 7, 14, or 21 days after ligature placement and the mandibles were removed for macroscopic evaluation of alveolar bone loss (ABL). In addition, histological analysis of periodontal tissues, myeloperoxidase (MPO) activity of gingival tissues, and periodontal tissue expression of collagen type I, RUNX2, RANK, RANKL, OPG, BLT1, Cys-LTR1, LTA4H, and LTC4S were also analyzed. RESULTS MT significantly reduced ABL at 14 (MT10 and MT30) and 21 days (MT10) (P < 0.05), gingival MPO at 7 (MT10) and 14 days (MT30) (P < 0.05), LTA4H, BLT1 and LTC4S gene expression on day 14 day (MT30, P < 0.05) and increased RUNX2 expression on day 14 (MT30, P < 0.05). CONCLUSION Systemic therapy with MT decreases periodontal inflammation and ABL in ligature-induced periodontitis in rats.
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Affiliation(s)
- Marcella G Moro
- Department of Stomatology, Discipline of Periodontology, School of Dentistry, University of São Paulo (FOUSP), São Paulo, São Paulo, Brazil
| | - Marilia D S Oliveira
- Department of Stomatology, Discipline of Periodontology, School of Dentistry, University of São Paulo (FOUSP), São Paulo, São Paulo, Brazil
| | - Maria M Santana
- Department of Stomatology, Discipline of Periodontology, School of Dentistry, University of São Paulo (FOUSP), São Paulo, São Paulo, Brazil
| | - Flavia N de Jesus
- Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo (USP), São Paulo, São Paulo, Brazil
| | - Karla Feitosa
- Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo (USP), São Paulo, São Paulo, Brazil
| | - Simone A Teixeira
- Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo (USP), São Paulo, São Paulo, Brazil
| | - Gilson C N Franco
- Department of Dentistry, State University of Ponta Grossa (UEPG), Ponta Grossa, Paraná, Brazil
| | - Luis Carlos Spolidorio
- Department of Oral Pathology, Dental School of Araraquara, State University of São Paulo (UNESP) Araraquara, São Paulo, Brazil
| | - Marcelo N Muscará
- Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo (USP), São Paulo, São Paulo, Brazil
| | - Marinella Holzhausen
- Department of Stomatology, Discipline of Periodontology, School of Dentistry, University of São Paulo (FOUSP), São Paulo, São Paulo, Brazil
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Xiao C, Bai G, Du Y, Jiang H, Yu X. Association of high HIF-1α levels in serous periodontitis with external root resorption by the NFATc1 pathway. J Mol Histol 2020; 51:649-658. [PMID: 32990833 DOI: 10.1007/s10735-020-09911-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Accepted: 09/16/2020] [Indexed: 01/25/2023]
Abstract
Whether external root resorption is associated with hypoxia in the periodontal ligaments of teeth with severe periodontitis remains unclear. Hypoxia inducible factor-1α (HIF-1α) expression and external resorption sites in the periodontal ligaments of these teeth were observed to elaborate upon the relationship between hypoxia and external root resorption in severe periodontitis. Histological analysis was performed to observe external root resorption. The expressions of HIF-1α and Nuclear factor-activated T cells c1 (NFATc1) in the periodontal ligaments were detected by immunofluorescence, western blotting and real-time PCR. Bone marrow macrophages (BMMs) were stimulated by Porphyromonas gingivalis lipopolysaccharide (Pg.LPS) and cultured under hypoxia in vitro. High levels of HIF-1α and NFATc1 were detected in severe periodontitis. HIF-1α positive-cells were observed in the external resorption sites. Hypoxia promoted Pg.LPS-stimulated osteoclastogenesis of BMMs and bone resorption by the NFATc1 pathway. Increased HIF-1α in severe periodontitis are associated with external root resorption by the NFATc1 pathway.
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Affiliation(s)
- Changjie Xiao
- Department of Endodontics, Jinan Stomatological Hospital, Jinan, Shandong, People's Republic of China
| | - Guangliang Bai
- Department of Oral Medicine, Liaocheng Peoples Hospital, Liaocheng, Shandong, People's Republic of China
| | - Yanmei Du
- Department of Endodontics, Jinan Stomatological Hospital, Jinan, Shandong, People's Republic of China
| | - Huan Jiang
- Department of Endodontics, Jinan Stomatological Hospital, Jinan, Shandong, People's Republic of China.
| | - Xijiao Yu
- Department of Endodontics, Jinan Stomatological Hospital, Jinan, Shandong, People's Republic of China.
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10
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Yue Y, Liu X, Li Y, Xia B, Yu W. The role of TLR4/MyD88/NF-κB pathway in periodontitis-induced liver inflammation of rats. Oral Dis 2020; 27:1012-1021. [PMID: 32853444 PMCID: PMC8247295 DOI: 10.1111/odi.13616] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2020] [Revised: 07/24/2020] [Accepted: 08/12/2020] [Indexed: 02/07/2023]
Abstract
OBJECTIVES The aim of this study was to clarify the immune mechanism of hepatic injury induced by periodontitis using a rat model. METHODS Twenty-four SPF male Wistar rats were randomly divided into two groups: control group (CG) and periodontitis group (PG). In order to induce experimental periodontitis, we tied the wire ligature around bilateral maxillary first molar of rats. After 8 weeks, the following indicators were valued: gingival index, tooth mobility, probing pocket depth; indexes about oxidative stress and circulating biomarkers; bone retraction by micro-CT analysis; Toll-like receptor 4 (TLR4), myeloid differential protein-88 (MyD88), and nuclear factor kappa B (NF-κB) by qRT-PCR and Western blotting; tumor necrosis factor α (TNF-α), and interleukin-6 (IL-6) by qRT-PCR and immunohistochemical staining; inflammation of periodontal and hepatic tissues by histopathological observation. RESULTS Periodontal indicators and micro-CT results showed the raised levels of inflammatory response and bone retraction in PG compared with CG. The mRNA and protein levels of TLR4, MyD88, NF-κB, TNF-α, and IL-6 have indicated high values in PG versus CG. Histopathological analysis revealed a correlation between periodontitis and hepatic injury. CONCLUSION TLR4/MyD88/NF-κB pathway may play a role in periodontitis-induced liver inflammation of rats.
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Affiliation(s)
- Yiyun Yue
- Department of Periodontology, Jilin University, Changchun, China
| | - Xinchan Liu
- Department of Geriatric Stomatology, Jilin University, Changchun, China
| | - Yan Li
- Department of Periodontology, Jilin University, Changchun, China
| | - Boyuan Xia
- Department of Periodontology, Jilin University, Changchun, China
| | - Weixian Yu
- Department of Geriatric Stomatology, Jilin University, Changchun, China.,Jilin Provincial Laboratory of Biomedical Engineering, School and Hospital of Stomatology, Jilin University, Changchun, China
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11
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Yu X, Jiang H, Cheng G, Shang W, Zhang S. High levels of HIF-1ɑ in hypoxic dental pulps associated with teeth with severe periodontitis. J Mol Histol 2020; 51:265-275. [PMID: 32394128 DOI: 10.1007/s10735-020-09878-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Accepted: 05/04/2020] [Indexed: 12/29/2022]
Abstract
In this study we investigated the expression of HIF-1ɑ in dental pulps of the teeth with severe periodontitis. The expression of HIF-1ɑ in dental pulps of the teeth with severe periodontitis was detected by immunohistochemistry, immunofluorescence and real-time PCR. Bone marrow macrophages (BMMs) were cultured under hypoxia in vitro. HIF-1ɑ, osteoclast-specific factors (NFATc1, CTSK and c-fos) and RANKL-induced osteoclastogenesis were evaluated by immunofluorescence, TRAP staining and western blotting. High levels of HIF-1ɑ protein were detected in dental pulps of teeth with severe periodontitis, whereas few positive HIF-1ɑ expressions were detected in healthy dental pulps. Hypoxia occurred in the dental pulps in response to heavy periodontitis. Many HIF-1ɑ-positive infiltratory inflammatory cells were observed around blood vessels. Tooth internal resorption was found in some teeth with severe periodontitis. The HIF-1ɑ levels were upregulated in BMMs under hypoxia, which also promoted osteoclast formation and resorption by NFATc1, CTSK and c-fos. Teeth with severe periodontitis show hypoxic dental pulps and increased potential of osteoclastic differentiation.
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Affiliation(s)
- Xijiao Yu
- Department of Oral Surgery, Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai, People's Republic of China.,Department of Endodontics, Jinan Stomatological Hospital, Jinan, Shandong, People's Republic of China
| | - Huan Jiang
- Department of Endodontics, Jinan Stomatological Hospital, Jinan, Shandong, People's Republic of China
| | - Guannan Cheng
- Department of Orthodontics, Weihai Stomatological Hospital, Weihai, Shandong, People's Republic of China
| | - Wenzhi Shang
- Department of Endodontics, Jinan Stomatological Hospital, Jinan, Shandong, People's Republic of China.
| | - Shanyong Zhang
- Department of Oral Surgery, Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai, People's Republic of China.
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Yan K, Lin Q, Tang K, Liu S, Du Y, Yu X, Li S. Substance P participates in periodontitis by upregulating HIF-1α and RANKL/OPG ratio. BMC Oral Health 2020; 20:27. [PMID: 32000757 PMCID: PMC6993464 DOI: 10.1186/s12903-020-1017-9] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Accepted: 01/20/2020] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Both substance P and hypoxia-inducible factor 1 alpha (HIF-1α) are involved in inflammation and angiogenesis. However, the relationship between substance P and HIF-1α in rat periodontitis is still unknown. METHODS Ligation-induced rat periodontitis was established to observe the distribution and expression of substance P and HIF-1α by immunohistochemistry. Rat gingival fibroblasts were cultured and stimulated with Porphyromonas gingivalis lipopolysaccharide (LPS). Recombinant substance P was applied to elaborate the relationship between substance P and HIF-1α in gingival fibroblasts in vitro. Primary mouse bone marrow-derived macrophages (BMMs) were isolated and cultured to observe the effect of substance P on receptor activator of NF-κB ligand (RANKL)-induced osteoclastogenesis by TRAP staining. Western blotting was used to investigate the expression of HIF-1α, osteoprotegerin (OPG) and RANKL. RESULTS Rat experimental periodontitis was successfully established 6 weeks after ligation. Gingival inflammatory infiltration and alveolar bone loss were observed. Positive expression of substance P was found in the infiltrating cells. Higher HIF-1α levels were observed in periodontitis compared to that of normal tissues. Substance P upregulated the level of HIF-1α in gingival fibroblasts with or without 1 μg/ml LPS in vitro (*P < 0.05). Substance P upregulated the expression of HIF-1α in RANKL-stimulated BMMs in vitro. Substance P also increased the RANKL/OPG ratio in gingival fibroblasts (*P < 0.05). Both 10 nM and 50 nM substance P promoted RANKL-induced osteoclast differentiation (*P < 0.05). CONCLUSION Substance P participates in periodontitis by upregulating HIF-1α and the RANKL/OPG ratio.
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Affiliation(s)
- Kaixian Yan
- Department of Periodontology, School and Hospital of Stomatology, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, 250012, Jinan, Shandong, People's Republic of China
| | - Qin Lin
- Department of Endodontics, Jinan Stomatological Hospital, Jinan, Shandong, People's Republic of China
| | - Kailiang Tang
- Department of Endodontics, Jinan Stomatological Hospital, Jinan, Shandong, People's Republic of China
| | - Shuang Liu
- Department of Periodontology, School and Hospital of Stomatology, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, 250012, Jinan, Shandong, People's Republic of China
| | - Yi Du
- Department of Endodontics, Jinan Stomatological Hospital, Jinan, Shandong, People's Republic of China
| | - Xijiao Yu
- Department of Periodontology, School and Hospital of Stomatology, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, 250012, Jinan, Shandong, People's Republic of China. .,Department of Endodontics, Jinan Stomatological Hospital, Jinan, Shandong, People's Republic of China.
| | - Shu Li
- Department of Periodontology, School and Hospital of Stomatology, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, 250012, Jinan, Shandong, People's Republic of China.
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Bi CS, Wang J, Qu HL, Li X, Tian BM, Ge S, Chen FM. Calcitriol suppresses lipopolysaccharide-induced alveolar bone damage in rats by regulating T helper cell subset polarization. J Periodontal Res 2019; 54:612-623. [PMID: 31095745 DOI: 10.1111/jre.12661] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Revised: 02/18/2019] [Accepted: 03/30/2019] [Indexed: 12/12/2022]
Abstract
BACKGROUND Although the immunomodulatory properties of calcitriol in bone metabolism have been documented for decades, its therapeutic role in the management of periodontitis remains largely unexplored. In this study, we hypothesized that calcitriol suppresses lipopolysaccharide (LPS)-induced alveolar bone loss by regulating T helper (Th) cell subset polarization. METHODS To test this hypothesis, we determined the effect of calcitriol intervention on the development of LPS-induced periodontitis in rats in terms of bone loss (micro-CT analysis), local inflammatory infiltration levels, the number of osteoclasts (hematoxylin and eosin staining) and the level of osteoclastogenesis (tartrate-resistant acid phosphatase method). Furthermore, immunohistochemistry was used to assess the expression levels of the receptor activator of NF-κB ligand (RANKL) and osteoprotegerin (OPG) as well as the cytokine levels of interferon-γ (IFN-γ), interleukin-4 (IL-4), IL-17, and IL-10 throughout the LPS-injected region. Finally, the polarization potential of Th cells in peripheral blood was analyzed using flow cytometry. RESULTS Calcitriol intervention decreased alveolar bone loss in response to LPS injection and inflammatory cell infiltration. Analysis of osteoclast number and RANKL and OPG expression showed that bone resorption activity was largely suppressed in response to calcitriol administration, along with decreased IL-17 levels but increased IL-4 and IL-10 levels in periodontal tissues (the LPS-injected region). Similarly, the percentages of Th2 and Treg cells in peripheral blood increased, but the percentages of Th1 and Th17 cells decreased in rats receiving calcitriol. CONCLUSION Our findings suggest that calcitriol can be used to inhibit bone loss in experimental periodontitis, likely via the regulation of local and systemic Th cell polarization.
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Affiliation(s)
- Chun-Sheng Bi
- State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases, Department of Periodontology, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - Jia Wang
- State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases, Department of Periodontology, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - Hong-Lei Qu
- State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases, Department of Periodontology, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - Xuan Li
- State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases, Department of Periodontology, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - Bei-Min Tian
- State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases, Department of Periodontology, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - Shaohua Ge
- Shandong Provincial Key Laboratory of Oral Tissue Regeneration, Department of Periodontology, School of Stomatology, Shandong University, Jinan, China
| | - Fa-Ming Chen
- State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases, Department of Periodontology, School of Stomatology, Fourth Military Medical University, Xi'an, China
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Yu X, Zheng F, Du Y, Tang K, Wang W, Zhang S. Semaphorin 3A gets involved in the establishment of mouse tooth eruptive pathway. J Mol Histol 2019; 50:427-34. [DOI: 10.1007/s10735-019-09838-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Accepted: 06/30/2019] [Indexed: 02/06/2023]
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Yu X, Liu H, Li C, Du Y, Du Y, Zhang S. Periodontal ligament-associated protein-1 gets involved in the development of osseous eruption canal. J Mol Histol 2018; 50:35-42. [PMID: 30511172 DOI: 10.1007/s10735-018-9805-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Accepted: 11/28/2018] [Indexed: 01/09/2023]
Abstract
Osseous eruption is an important stage of tooth eruption process. The role of periodontal ligament-associated protein-1 (PLAP-1/asporin) in the development of osseous eruption canal remain undefined and were the focus of this study. C57BL/6 mice at postnatal days P11-13 and P 15-16 were chosen. The development of osseous eruption canal of lower first molar was observed and osteoclasts were detected by staining for tartrate-resistant acid phosphatase (TRAP). PLAP-1 expression in the process of osseous eruption (OE, P11-13) and post- osseous eruption (P-OE, P15-16) was assessed by immunohistochemistry, immunofluorescence and western blotting. Receptor activator of NF-κB ligand (RANKL) distribution in the process was also assessed by immunohistochemistry. A double immunofluorescence stain was used to reveal PLAP-1 in association with CD68 (osteoclast maker). Fresh occlusal tissues of erupting lower first molars at OE and P-OE were separated to detected RANKL/OPG ratio by western blotting to elucidate related mechanisms. At osseous eruption (OE), osseous and mucosal tissues could be observed on the occlusal side of lower first molar. Osseous eruption canal was developing. Many osteoclasts were found around occlusal alveolar bone in the development of osseous eruption canal. At post- osseous eruption (P-OE), osseous eruption canal had been built, only mucosal tissues were observed, and few osteoclasts were detected. More PLAP-1 expression was detected at OE, compared with that at P-OE. Similar distributions of PLAP-1 and RANKL in occlusal bone tissues of erupting lower first molars were detected at OE. Colocalization of PLAP-1 and CD68 revealed the positive relationship between PLAP-1 and osteoclasts in the development of osseous eruption canal. PLAP-1 positively correlated with RANKL and CD68+ osteoclasts, and areas of bone resorption. Higher RANKL/OPG ratio was detected at OE, compared with that at P-OE. PLAP-1 gets involved in the development of osseous eruption canal.
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Affiliation(s)
- Xijiao Yu
- Department of Oral Surgery, Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai, People's Republic of China
- Department of Endodontics, Jinan Stomatological Hospital, Jinan, 250001, Shandong, People's Republic of China
| | - Hongmei Liu
- Department of Endodontics, Jinan Stomatological Hospital, Jinan, 250001, Shandong, People's Republic of China
| | - Chong Li
- Department of Endodontics, Jinan Stomatological Hospital, Jinan, 250001, Shandong, People's Republic of China
| | - Yanmei Du
- Department of Endodontics, Jinan Stomatological Hospital, Jinan, 250001, Shandong, People's Republic of China
| | - Yi Du
- Department of Endodontics, Jinan Stomatological Hospital, Jinan, 250001, Shandong, People's Republic of China
| | - Shanyong Zhang
- Department of Oral Surgery, Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai, People's Republic of China.
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Yu X, Liu H, Liu S, Chen X, Zhao X, Du Y, Li S. Periodontal ligament-associated protein-1 gets involved in experimental periodontitis. J Periodontal Res 2018; 54:180-189. [PMID: 30298589 DOI: 10.1111/jre.12618] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 09/02/2018] [Accepted: 09/08/2018] [Indexed: 01/27/2023]
Abstract
BACKGROUND AND OBJECTIVE Periodontal ligament-associated protein-1 (PLAP-1) is an important regulator of osteogenic differentiation of periodontal ligament cells and plays important role in the homeostasis of periodontal tissues. But the role of PLAP-1 in periodontitis is poorly understood. Expressions of PLAP-1 in experimental periodontitis are observed to elucidate whether PLAP-1 gets involved in the pathogenesis of periodontitis. MATERIAL AND METHODS Wistar rats were randomly allocated to two groups (n = 6/group): Ligation group and Control group. PLAP-1 expression in experimental periodontitis was assessed by immunohistochemistry and collagen fibers in periodontal ligament were observed using picrosirius red staining. Expressions of PLAP-1 and CD68 in periodontitis were colocalized by double-labelled immunofluorescence. To further examine the relationship between PLAP-1 and osteoclastogenesis in experimental periodontitis, acute periodontal inflammatory infiltration and alveolar bone destruction were induced by administering ligated rats with 10 ng/mL tumor necrosis factor alpha (TNF-α; ligation + TNF-α group, n = 6). Alveolar bone loss was observed by micro-computed tomography (Micro-CT), and osteoclasts were identified by tartrate-resistant acid phosphatase staining (TRAP). Expressions of PLAP-1 in TNF-α stimulated human periodontal ligament cells were also detected at 24 and 48 hours by western blotting. RESULTS PLAP-1 expression levels in periodontal ligament cells and collagen fibers were lower in the ligation group,compared with the control group. Similarly, TNF-α decreased PLAP-1 expression in human periodontal ligament cells in vitro. Degradation or destruction of collagen fibers accompanied the reduced PLAP-1 expression in the periodontal ligament in the ligation group. Colocalization of PLAP-1 and CD68 revealed the positive relationship between PLAP-1 and CD68+ infiltrating cells in periodontitis. More PLAP-1-positive inflammatory cells were found in the ligation + TNF-α group, compared with the ligation + saline group. CONCLUSION PLAP-1-positive inflammatory cells are involved in the pathogenesis of periodontitis. An increase in PLAP-1-positive inflammatory cell number contributes periodontal inflammation and alveolar bone loss.
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Affiliation(s)
- Xijiao Yu
- Department of Endodontics, Jinan Stomatological Hospital, Jinan, China.,Shandong Provincial Key Laboratory of Oral Tissue Regeneration, School and Hospital of Stomatology, Shandong University, Jinan, China
| | - Hongmei Liu
- Department of Endodontics, Jinan Stomatological Hospital, Jinan, China
| | - Shuang Liu
- Shandong Provincial Key Laboratory of Oral Tissue Regeneration, School and Hospital of Stomatology, Shandong University, Jinan, China
| | - Xue Chen
- Shandong Provincial Key Laboratory of Oral Tissue Regeneration, School and Hospital of Stomatology, Shandong University, Jinan, China
| | - Xinyu Zhao
- Shandong Provincial Key Laboratory of Oral Tissue Regeneration, School and Hospital of Stomatology, Shandong University, Jinan, China
| | - Yi Du
- Department of Endodontics, Jinan Stomatological Hospital, Jinan, China
| | - Shu Li
- Shandong Provincial Key Laboratory of Oral Tissue Regeneration, School and Hospital of Stomatology, Shandong University, Jinan, China
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Li X, Liu N, Gu B, Hu W, Li Y, Guo B, Zhang D. BMAL1 regulates balance of osteogenic–osteoclastic function of bone marrow mesenchymal stem cells in type 2 diabetes mellitus through the NF-κB pathway. Mol Biol Rep 2018; 45:1691-704. [DOI: 10.1007/s11033-018-4312-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Accepted: 08/16/2018] [Indexed: 12/14/2022]
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Xiao CJ, Yu XJ, Xie JL, Liu S, Li S. Protective effect and related mechanisms of curcumin in rat experimental periodontitis. Head Face Med 2018; 14:12. [PMID: 30115081 PMCID: PMC6097422 DOI: 10.1186/s13005-018-0169-1] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Accepted: 08/03/2018] [Indexed: 01/16/2023] Open
Abstract
Background Curcumin exhibits anti-inflammatory effects and has been suggested as a treatment for inflammatory diseases. The aim of this study was to investigate the effects of curcumin on the lipopolysaccharide induced inflammatory response in rat gingival fibroblasts in vitro and ligation-induced experimental periodontitis in vivo, and to speculate the possible anti-inflammatory mechanism of curcumin. Methods The gingival fibroblasts were incubated with different concentrations of curcumin in the absence or presence of lipopolysaccharide (LPS). Concentrations of interleukin-1β(IL-1β), tumor necrosis factor-α (TNF-α), osteoprotegerin (OPG) and soluble receptor activator of nuclear factor kappa-B ligand (RANKL) culture supernatants of rat gingival fibroblasts were determined by enzyme linked immunosorbent assay. The nuclear fraction of rat gingival fibroblasts was extracted and nuclear factor kappa-B (NF-κB) activation was assessed by western blotting to elucidate related mechanisms. Curcumin was given every two days by oral gavage. The gingival inflammation and alveolar bone loss between the first and second molars were observed by hematoxylin and eosin staining. Collagen fibers were observed by picro-sirius red staining. Alveolar bone loss was assessed by micro-CT analysis. Results Curcumin attenuated the production of IL-1β and TNF-α in rat gingival fibroblasts stimulated by LPS, and inhibited the LPS-induced decrease in OPG/sRANKL ratio and NF-κB activation. Curcumin significantly reduced gingival inflammation and modulated collagen fiber and alveolar bone loss in vivo. Conclusions curcumin modulates inflammatory activity in rat periodontitis by inhibiting NF-κB activation and decreasing the OPG/sRANKL ratio induced by LPS.
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Affiliation(s)
- Chang-Jie Xiao
- Shandong Provincial Key Laboratory of Oral tissue regeneration, Department of Periodontology, School and Hospital of Stomatology, Shandong University, 44-1# West Wenhua Road, Jinan, Shandong, China.,Department of Endodontics, Jinan Stomatological Hospital, 101# Jingliu Road, Jinan, Shandong, China
| | - Xi-Jiao Yu
- Department of Endodontics, Jinan Stomatological Hospital, 101# Jingliu Road, Jinan, Shandong, China
| | - Jian-Li Xie
- Department of Endodontics, Jinan Stomatological Hospital, 101# Jingliu Road, Jinan, Shandong, China
| | - Shuang Liu
- Shandong Provincial Key Laboratory of Oral tissue regeneration, Department of Periodontology, School and Hospital of Stomatology, Shandong University, 44-1# West Wenhua Road, Jinan, Shandong, China
| | - Shu Li
- Shandong Provincial Key Laboratory of Oral tissue regeneration, Department of Periodontology, School and Hospital of Stomatology, Shandong University, 44-1# West Wenhua Road, Jinan, Shandong, China.
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Xue L, Su L, Zhao L, Li J, Du Y, Yu X. Cyclophilin a increases CD68+ cell infiltration in rat experimental periodontitis. J Mol Histol 2018; 49:157-64. [DOI: 10.1007/s10735-018-9755-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Accepted: 01/05/2018] [Indexed: 01/26/2023]
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