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Xiang Y, Yang R, Li X, Huang H, Duan K, Song F. Phage PEf771 for the Treatment of Periapical Periodontitis Induced by Enterococcus faecalis YN771. Crit Rev Immunol 2024; 44:41-53. [PMID: 37947071 DOI: 10.1615/critrevimmunol.2023050313] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2023]
Abstract
Enterococcus faecalis was the main causative bacteria of refractory periapical periodontitis (PP), there is a pressing need to explore effective methods for eradicating E. faecalis in patients with refractory PP. This study aimed to assess the anti-infective effectiveness of phage PEf771 in treating periapical inflammation in rats. We developed a rat model of PP through E. faecalis YN771 induction. Micro-computed tomography and hematoxylin-eosin staining were utilized to evaluate bone destruction and inflammation in experimental teeth for seven consecutive weeks. Subsequently, rats with PP caused by E. faecalis YN771 were treated with phage PEf771, calcium hydroxide preparation, and 2% chlorhexidine gel. The healing progress of bone defects and inflammation in the apical region was monitored over three consecutive weeks using imaging and histopathology assessments. The PP rat model was successfully developed, and bone destruction and inflammatory cell infiltration in the apical region of the experimental tooth peaked at 4 weeks. The area of bone destruction in rats treated with phage PEf771, calcium hydroxide preparation, and 2% chlorhexidine gel was significantly smaller than that in the untreated group. Phage PEf771, calcium hydroxide preparation, and 2% chlorhexi-dine gel all have the effect of promoting the healing of apical lesions. Therapeutic effects of phage PEf771 on periapical inflammation infected by E. faecalis YN771 enhanced with time. Phage PEf771 promoted the healing of apical lesions, presenting a promising new approach for the treatment of refractory PP using bacteriophages.
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Affiliation(s)
- Yingying Xiang
- Department of Stomatology, Yan'an Hospital Affiliated to Kunming Medical University, Kunming, Yunnan, China
| | - Rongyu Yang
- Department of Clinical Medicine, First Affiliated Hospital of Dali University, Dali, Yunnan, China
| | - Xuelin Li
- Department of Stomatology, Yan'an Hospital Affiliated to Kunming Medical University, Kunming, Yunnan, China
| | - Hao Huang
- Department of Stomatology, Yan'an Hospital Affiliated to Kunming Medical University, Kunming, Yunnan, China
| | - Kaiwen Duan
- Department of Stomatology, Yan'an Hospital Affiliated to Kunming Medical University, Kunming, Yunnan, China
| | - Fei Song
- Department of Minimally Invasive Intervention, The Third Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, China
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Prasetyo EP, Sampoerno G, Juniarti DE, Cahyani F, Saraswati W, Kuntjoro M, Tjendronegoro E. Effect of Lipopolysaccharide-Induced Apical Periodontitis in Diabetes Mellitus Rats on Periapical Inflammation. Eur J Dent 2023; 17:1146-1152. [PMID: 36599453 PMCID: PMC10756800 DOI: 10.1055/s-0042-1758790] [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] [Indexed: 01/06/2023] Open
Abstract
OBJECTIVES To evaluate periapical inflammation through immunohistochemical analysis of interleukin 6 (IL-6) and tumor necrosis factor α (TNF-a) expression resulting from lipopolysaccharide (LPS)-induced apical periodontitis in diabetes mellitus rats, observed at 14, 28, and 42 days. MATERIALS AND METHODS Diabetes model on rats was induced by streptozotocin (STZ). Fifteen rats were injected with low-dose STZ for 5 days and waited for 5 days until the blood glucose level was stable and measured above 300 mg/dL confirmed by a digital glucometer. LPS was used to induce apical periodontitis. After performing access cavity, pulpal and root canal extirpation was done on the right mandibular first molar's root canal space of rats, under anesthesia. LPS of 1 mg/mL dose was induced in the pulpal and root canal space. Apical periodontitis was expected 14 days afterward and then, the rats were randomly allocated to three groups. The first group was terminated 14 days after induction and used as control. The second group was observed 28 days after induction, and the third group was observed 42 days after induction. IL-6 and TNF-a expression was analyzed by immunohistochemistry on macrophages in the periapical area. STATISTICAL ANALYSIS Data were analyzed using one-way ANOVA and continued with the post hoc Tukey HSD test. Significance was considered if p < 0.05. RESULTS LPS induced apical periodontitis in diabetes mellitus rats at control (14 days), 28 and 42 days observation showed a significant increase in the expression of IL-6 and TNF-a. There were significant differences between the control and observed groups (p < 0.05). The expression of IL-6 in the apical area was not significant at 14 and 28 days (p > 0.05) but increased significantly at 42 days (p < 0.05). The expression of TNF-a in the apical area was significantly increased after 14 days (p < 0.05) and remained stable at 28 and 42 days (p > 0.05). CONCLUSIONS The periapical inflammation of LPS-induced apical periodontitis in diabetes mellitus rats increased macrophages' expression of IL-6 at 42 days and TNF-a at 28 days.
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Affiliation(s)
- Eric Priyo Prasetyo
- Department of Conservative Dentistry, Faculty of Dental Medicine, Universitas Airlangga, Surabaya, Indonesia
| | - Galih Sampoerno
- Department of Conservative Dentistry, Faculty of Dental Medicine, Universitas Airlangga, Surabaya, Indonesia
| | - Devi Eka Juniarti
- Department of Conservative Dentistry, Faculty of Dental Medicine, Universitas Airlangga, Surabaya, Indonesia
| | - Febriastuti Cahyani
- Department of Conservative Dentistry, Faculty of Dental Medicine, Universitas Airlangga, Surabaya, Indonesia
| | - Widya Saraswati
- Department of Conservative Dentistry, Faculty of Dental Medicine, Universitas Airlangga, Surabaya, Indonesia
| | - Mefina Kuntjoro
- Department of Prosthodontics, Faculty of Dental Medicine, Universitas Airlangga, Surabaya, Indonesia
| | - Evelyn Tjendronegoro
- Healthcare and Research, Irvine Medical Center, University of California, Irvine, California, United States
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Santos RMD, Machado NEDS, Cantiga-Silva C, Belardi BE, Tsosura TVS, Chiba FY, Tessarin GWL, Mattera MSDLC, Nobumoto ACTY, Ervolino E, Cintra LTA, Matsushita DH. Modulatory influence of melatonin on apical periodontitis in Wistar rats fed a high-fat diet. Arch Oral Biol 2023; 153:105749. [PMID: 37320884 DOI: 10.1016/j.archoralbio.2023.105749] [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: 03/29/2023] [Revised: 06/08/2023] [Accepted: 06/08/2023] [Indexed: 06/17/2023]
Abstract
OBJECTIVE This study aimed to evaluate the influence of high-fat diet (HFD) and melatonin (MEL) treatment on the progression of inflammation and alveolar bone resorption (ABR) in rats with AP. DESIGN Forty male Wistar rats were divided into four groups: apical periodontitis (AP), HFDAP, APMEL and HFDAPMEL. The animals were fed an HFD or standard diet for 107 days. On the 7th day, the rats were subjected to AP, and after 70 days, the rats in the MEL groups were treated with MEL for 30 days. Post treatment, the animals were euthanized, and their jaws were retrieved for evaluation of bone resorption, intensity of the inflammatory response, and immunohistochemical analysis including tartrate-resistant acid phosphatase (TRAP) and interleukin-1β (IL-1β) levels and tumor necrosis factor (TNF)-α expression. RESULTS The APMEL group showed reduction in the inflammatory infiltrate and IL-1β expression relation to HFDAP, while the TNF-α levels did not differ among the groups. The HFDAP group showed an increase in the ABR. MEL reduced the TRAP levels in the APMEL and HFDAPMEL groups. CONCLUSIONS while MEL could reduce TRAP levels in the APMEL and HFDAPMEL groups, the reduction in the HFDAPMEL group was smaller than that in the APMEL group, demonstrating that the interaction between AP and HFD decreased the anti-resorptive effects of MEL.
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Affiliation(s)
- Rodrigo Martins Dos Santos
- São Paulo State University (UNESP), School of Dentistry, Araçatuba Department of Basic Sciences, School of Dentistry, São Paulo State University (UNESP) Araçatuba, Brazil; Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas (PPGMCF)/Sociedade Brasileira de Fisiologia (SBFis), School of Dentistry, São Paulo State University (UNESP), Araçatuba, Brazil
| | - Nathalia Evelyn da Silva Machado
- São Paulo State University (UNESP), School of Dentistry, Araçatuba, Department of Preventive and Restorative Dentistry, Araçatuba, SP, Brazil
| | - Cristiane Cantiga-Silva
- São Paulo State University (UNESP), School of Dentistry, Araçatuba, Department of Preventive and Restorative Dentistry, Araçatuba, SP, Brazil
| | - Bianca Elvira Belardi
- São Paulo State University (UNESP), School of Dentistry, Araçatuba Department of Basic Sciences, School of Dentistry, São Paulo State University (UNESP) Araçatuba, Brazil; Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas (PPGMCF)/Sociedade Brasileira de Fisiologia (SBFis), School of Dentistry, São Paulo State University (UNESP), Araçatuba, Brazil
| | - Thais Verônica Saori Tsosura
- São Paulo State University (UNESP), School of Dentistry, Araçatuba Department of Basic Sciences, School of Dentistry, São Paulo State University (UNESP) Araçatuba, Brazil; Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas (PPGMCF)/Sociedade Brasileira de Fisiologia (SBFis), School of Dentistry, São Paulo State University (UNESP), Araçatuba, Brazil
| | - Fernando Yamamoto Chiba
- São Paulo State University (UNESP), School of Dentistry, Araçatuba, Department of Preventive and Restorative Dentistry, Araçatuba, SP, Brazil
| | - Gestter Willian Lattari Tessarin
- São Paulo State University (UNESP), School of Dentistry, Araçatuba Department of Basic Sciences, School of Dentistry, São Paulo State University (UNESP) Araçatuba, Brazil; North University Center of São Paulo, Unorte, São José do Rio Preto, SP, Brazil.
| | - Maria Sara de Lima Coutinho Mattera
- São Paulo State University (UNESP), School of Dentistry, Araçatuba Department of Basic Sciences, School of Dentistry, São Paulo State University (UNESP) Araçatuba, Brazil; Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas (PPGMCF)/Sociedade Brasileira de Fisiologia (SBFis), School of Dentistry, São Paulo State University (UNESP), Araçatuba, Brazil
| | - Ana Carla Thalez Ywabuchi Nobumoto
- São Paulo State University (UNESP), School of Dentistry, Araçatuba Department of Basic Sciences, School of Dentistry, São Paulo State University (UNESP) Araçatuba, Brazil; Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas (PPGMCF)/Sociedade Brasileira de Fisiologia (SBFis), School of Dentistry, São Paulo State University (UNESP), Araçatuba, Brazil
| | - Edilson Ervolino
- São Paulo State University (UNESP), School of Dentistry, Araçatuba Department of Basic Sciences, School of Dentistry, São Paulo State University (UNESP) Araçatuba, Brazil
| | - Luciano Tavares Angelo Cintra
- São Paulo State University (UNESP), School of Dentistry, Araçatuba, Department of Preventive and Restorative Dentistry, Araçatuba, SP, Brazil
| | - Doris Hissako Matsushita
- São Paulo State University (UNESP), School of Dentistry, Araçatuba Department of Basic Sciences, School of Dentistry, São Paulo State University (UNESP) Araçatuba, Brazil; Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas (PPGMCF)/Sociedade Brasileira de Fisiologia (SBFis), School of Dentistry, São Paulo State University (UNESP), Araçatuba, Brazil
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Luo X, Wan Q, Cheng L, Xu R. Mechanisms of bone remodeling and therapeutic strategies in chronic apical periodontitis. Front Cell Infect Microbiol 2022; 12:908859. [PMID: 35937695 PMCID: PMC9353524 DOI: 10.3389/fcimb.2022.908859] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Accepted: 06/27/2022] [Indexed: 12/19/2022] Open
Abstract
Chronic periapical periodontitis (CAP) is a typical oral disease in which periodontal inflammation caused by an odontogenic infection eventually leads to bone loss. Uncontrolled infections often lead to extensive bone loss around the root tip, which ultimately leads to tooth loss. The main clinical issue in the treatment of periapical periodontitis is the repair of jawbone defects, and infection control is the first priority. However, the oral cavity is an open environment, and the distribution of microorganisms through the mouth in jawbone defects is inevitable. The subversion of host cell metabolism by oral microorganisms initiates disease. The presence of microorganisms stimulates a series of immune responses, which in turn stimulates bone healing. Given the above background, we intended to examine the paradoxes and connections between microorganisms and jaw defect repair in anticipation of new ideas for jaw defect repair. To this end, we reviewed the microbial factors, human signaling pathways, immune cells, and cytokines involved in the development of CAP, as well as concentrated growth factor (CGF) and stem cells in bone defect repair, with the aim of understanding the impact of microbial factors on host cell metabolism to inform the etiology and clinical management of CAP.
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Affiliation(s)
| | | | - Lei Cheng
- *Correspondence: Lei Cheng, ; Ruoshi Xu,
| | - Ruoshi Xu
- *Correspondence: Lei Cheng, ; Ruoshi Xu,
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Xiang Y, Ma C, Yin S, Song F, Qin K, Ding Y, Yang X, Song P, Ji X, Wei Y. Phage therapy for refractory periapical periodontitis caused by Enterococcus faecalis in vitro and in vivo. Appl Microbiol Biotechnol 2022. [PMID: 35190846 DOI: 10.1007/s00253-022-11810-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Revised: 01/19/2022] [Accepted: 01/22/2022] [Indexed: 11/02/2022]
Abstract
A phage PEf771 that specifically infects and lyses pathogenic Enterococcus faecalis YN771 in patients with refractory periapical periodontitis was used to investigate resistance against E. faecalis infection in vitro and in vivo. PEf771 completely lysed YN771 within 3 h, with a multiplicity of infection of 1. Compared with ten routinely used clinical antibiotics, PEf771 demonstrated the highest bacteriostatic effect within 72 h. The antibacterial effect of PEf771 on extracted teeth within 72 h was better than that of conventional root canal disinfectants such as camphorated phenol, formaldehyde cresol solution, and Ca(OH)2 (P < 0.05) within 72 h. Using E. faecalis, intraperitoneal and periapical infection models were established using Sprague Dawley (SD) rats. The results showed that all SD rats inoculated with 9.6 × 1011 CFU/mL E. faecalis YN771 or 2.9 × 1011 CFU/mL E. faecalis RYN771 died within 8 h. Additionally, all SD rats inoculated with YN771 and treated with antibiotics died within 72 h. Although SD rats inoculated with RYN771 and treated with antibiotics survived for 72 h, the pathological anatomy of these rats showed purulent discharge, numerous pus and blood-filled ascites, and extensive liver abscesses. Notably, YN771 rats treated with PEf771 and RYN771 rats treated with RPEf771 survived for 72 h, and their pathological anatomy showed that the liver, kidneys, intestine, and mesenteries were normal. Computed tomography analysis of SD rats infected with periapical periodontitis showed pathological changes in experimental teeth inoculated with YN771, despite undergoing a normal root canal treatment. Contrastingly, none of the experimental teeth exhibited root periapical inflammation following PEf771 treatment. Hematoxylin and eosin staining revealed a gap between the periodontal ligament and the cementum of experimental teeth, whereas PEf771-treated teeth exhibited normal results. These findings suggested that phage therapy using PEf771 might effectively prevent E. faecalis infection after root canal treatment.Key points• Compared with common clinical antibiotics, PEf771 showed the highest antibacterial.• The liver, kidney, intestine, and mesentery of SD rats treated with PEf771 were normal.• Phage therapy can effectively prevent E. faecalis YN771 and RYN771 infection.
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Hussein H, Kishen A. Local immunomodulatory effects of intracanal medications in apical periodontitis. J Endod 2022:S0099-2399(22)00035-8. [PMID: 35032538 DOI: 10.1016/j.joen.2022.01.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 12/31/2021] [Accepted: 01/03/2022] [Indexed: 12/11/2022]
Abstract
The immune system is an extremely complex biological network that plays a crucial role in the hemostasis of periapical tissue, pathogenesis of apical periodontitis (AP) as well as periapical tissue healing. The successful elimination of microbial infections remains a significant challenge, mostly due to the ever-growing development of antimicrobial-resistant pathogens. The bacterial endurance in the root canal system contributes to features ranging from altered post-treatment healing to exacerbation of chronic periradicular immune response, that compromise the outcome of endodontic treatment. A highly effective strategy for combating infectious diseases and the associated inflammation-mediated tissue damage is to modulate the host immune response in conjunction with antimicrobial therapy. There are several medications currently used in endodontic treatment, however, they suffer various levels of microbial resistance and do not deliver all the required characteristics to simultaneously address both intracanal bacteria and periapical inflammation. Interaction of antimicrobial agents with the immune system can impact its function, leading to immune-suppressive or immune-stimulatory effects. The group of non-conventional antimicrobial medications, such as antimicrobial peptides, propolis, and nanomaterials, are agents that provide strong antimicrobial effectiveness and concomitant immunomodulatory and/or reparative effect, without any host tissue damages. Herein, we provide an overview of local immune modulation in AP and a comprehensive review of the immunomodulatory effect of antimicrobials intracanal medications applied in endodontics with specific emphasis on the antimicrobial nanomaterial-based approaches that provide immunomodulatory potential for successful clinical deployment in endodontics.
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Baddam H, Vivekanandan G, Kondreddy K, Peddi S, Chitnis PP, Singh YP, Tiwar RVC. Evaluation of Gingival Crevicular Fluid and Serum Tartrate-resistant Acid Phosphatase Levels in Subjects with Clinically Healthy Periodontium and Chronic Periodontitis - A Clinico-biochemical Study. J Pharm Bioallied Sci 2021; 13:S1275-S1279. [PMID: 35017970 PMCID: PMC8686990 DOI: 10.4103/jpbs.jpbs_90_21] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 02/20/2021] [Accepted: 02/22/2021] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND Periodontitis is a chronic inflammatory disease with conglomerate etiology making it difficult to diagnose at the early stages. Potential biomarkers in gingival crevicular fluid (GCF) would determine the presence of the current disease activity, predict sites vulnerable for future breakdown, and assess the response to periodontal interventions. Merely elevated levels of inflammatory soft-tissue markers do not indicate bone destruction. Since there is no single ideal biomarker established, bone-related biomarkers such as telopeptide of type I collagen, osteocalcin, calprotectin, osteopontin, and tartrate-resistant acid phosphatase (TRAP) seem to hold great promise as predictive markers to determine bone destruction and active phases in the disease progression. The present study is intended to explore the biologic plausibility of the levels of TRAP in health and chronic periodontitis. MATERIALS AND METHODS The present cross-sectional clinico-biochemical study comprised 30 systemically healthy subjects with 15 periodontally healthy and 15 chronic periodontitis subjects who were age and gender matched. GCF and blood samples were collected from all the patients. TRAP estimation was done in both the samples using an enzyme-linked immunosorbent assay kit. The data were analyzed using independent t-test and Pearson correlation test. RESULTS Serum and GCF TRAP levels in chronic periodontitis subjects were significantly higher when compared to the periodontally healthy group. There were no significant correlations found among serum and GCF TRAP levels with increasing age and gender in both the groups. An increase in disease severity, i.e., increase in probing pocket depth and clinical attachment level, did not show correlation with the GCF and serum TRAP levels in the chronic periodontitis group. CONCLUSION Based on the findings of the present study, increased GCF TRAP levels in chronic periodontitis seem to be a potential marker for identifying ongoing periodontal destruction.
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Affiliation(s)
- Harshitha Baddam
- Department of Periodontics, Sri Sai College of Dental Surgery, Vikarabad, Telangana, India,Address for correspondence: Dr. Harshitha Baddam, Department of Periodontics, Sri Sai College of Dental Surgery, Vikarabad, Telangana, India. E-mail:
| | - Gopinath Vivekanandan
- Department of Periodontics, Aditya Dental College and Hospital, Beed, Maharashtra, India
| | - Kameswari Kondreddy
- Department of Periodontics, Faculty of Dentistry, AIMST University, Bedong, Malaysia
| | - Swapna Peddi
- Bachelor of Dental Surgery, SVS Dental College, Mahbubnagar, Telangana, India
| | | | - Yash Pal Singh
- Department of Restorative and Prosthetic Dental Sciences, College of Dentistry, Dar Al Ulum University, Riyadh, Saudi Arabia
| | - Rahul V. C. Tiwar
- Department of OMFS, Narsinbhai Patel Dental College and Hospital, Sankalchand Patel University, Visnagar, Gujarat, India
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Hernández M, Baeza M, Contreras J, Sorsa T, Tervahartiala T, Valdés M, Chaparro A, Hernández-Ríos P. MMP-8, TRAP-5, and OPG Levels in GCF Diagnostic Potential to Discriminate between Healthy Patients', Mild and Severe Periodontitis Sites. Biomolecules 2020; 10:biom10111500. [PMID: 33143325 PMCID: PMC7692260 DOI: 10.3390/biom10111500] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 10/27/2020] [Accepted: 10/28/2020] [Indexed: 12/30/2022] Open
Abstract
Biomarkers represent promising aids in periodontitis, host-mediate diseases of the tooth-supporting tissues. We assessed the diagnostic potential of matrix metalloproteinase-8 (MMP-8), tartrate-resistant acid phosphatase-5 (TRAP-5), and osteoprotegerin (OPG) to discriminate between healthy patients’, mild and severe periodontitis sites. Thirty-one otherwise healthy volunteers with and without periodontal disease were enrolled at the Faculty of Dentistry, University of Chile. Periodontal parameters were examined and gingival crevicular fluid was sampled from mild periodontitis sites (M; n = 42), severe periodontitis sites (S; n = 59), and healthy volunteer sites (H; n = 30). TRAP-5 and OPG were determined by commercial multiplex assay and MMP-8 by the immunofluorometric (IFMA) method. STATA software was used. All biomarkers showed a good discrimination performance. MMP-8 had the overall best performance in regression models and Receiver Operating Characteristic (ROC) curves, with high discrimination of healthy from periodontitis sites (area under the curve (AUC) = 0.901). OPG showed a very high diagnostic precision (AUC ≥ 0.95) to identify severe periodontitis sites (S versus H + M), while TRAP-5 identified both healthy and severe sites. As conclusions, MMP-8, TRAP-5, and OPG present a high precision potential in the identification of periodontal disease destruction, with MMP-8 as the most accurate diagnostic biomarker.
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Affiliation(s)
- Marcela Hernández
- Laboratory of Periodontal Biology, Faculty of Dentistry, University of Chile, Santiago 8380544, Chile;
- Department of Pathology and Oral Medicine, Faculty of Dentistry, University of Chile, Santiago 8380544, Chile
| | - Mauricio Baeza
- Department of Conservative Dentistry, Faculty of Dentistry, University of Chile, Santiago 8380544, Chile; (M.B.); (J.C.)
- School of Public Health, Faculty of Medicine, University of Chile, Santiago 7510040, Chile;
| | - Johanna Contreras
- Department of Conservative Dentistry, Faculty of Dentistry, University of Chile, Santiago 8380544, Chile; (M.B.); (J.C.)
| | - Timo Sorsa
- Department of Oral and Maxillofacial Diseases, Helsinki University and University Hospital, 00290 Helsinki, Finland; (T.S.); (T.T.)
- Department of Oral Diseases, Karolinska Institutet, 14152 Huddinge, Sweden
| | - Taina Tervahartiala
- Department of Oral and Maxillofacial Diseases, Helsinki University and University Hospital, 00290 Helsinki, Finland; (T.S.); (T.T.)
| | - Macarena Valdés
- School of Public Health, Faculty of Medicine, University of Chile, Santiago 7510040, Chile;
- Center for Climate and Resilience Research, CR2, University of Chile, Santiago 7510040, Chile
| | - Alejandra Chaparro
- Department of Periodontology, Centro de Investigación e Innovación Biomédica (CIIB), Faculty of Dentistry, Universidad de Los Andes, Santiago 7620001, Chile;
| | - Patricia Hernández-Ríos
- Department of Conservative Dentistry, Faculty of Dentistry, University of Chile, Santiago 8380544, Chile; (M.B.); (J.C.)
- Correspondence: ; Tel.: +56-229781839
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Fernández A, Veloso P, Astorga J, Rodríguez C, Torres VA, Valdés M, Garrido M, Gebicke-Haerter PJ, Hernández M. Epigenetic regulation of TLR2-mediated periapical inflammation. Int Endod J 2020; 53:1229-1237. [PMID: 32426871 DOI: 10.1111/iej.13329] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [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: 12/05/2019] [Accepted: 05/12/2020] [Indexed: 12/14/2022]
Abstract
AIM To determine the methylation pattern of TLR2 gene promoter and its association with the transcriptional regulation of periapical inflammatory and angiogenic responses in symptomatic and asymptomatic forms of apical periodontitis. METHODOLOGY In this cross-sectional study, apical lesions were obtained from volunteers with asymptomatic apical periodontitis (AAP) (n = 17) and symptomatic apical periodontitis (SAP) (n = 17) scheduled for tooth extraction, and both total RNA and DNA were extracted. DNA was bisulfite-treated, a region of CpG island within the TLR2 gene was amplified by qPCR and the products were sequenced. Additionally, the mRNA expression of TLR2, TLR4, IL-6, IL-12, TNFalpha, IL-23, IL-10, TGFbeta, VEGFA and CDH5 was analysed by qPCR. The data were analysed with chi-square tests, Mann-Whitney or unpaired t-tests, and Spearman´s correlation; variable adjustments were performed using multiple linear regression (P < 0.05). RESULTS TLR2 depicted a hypomethylated DNA profile at the CpG island in SAP when compared with AAP, along with upregulated expression of TLR2, with pro-inflammatory cytokines IL-6 and IL-23, and the angiogenesis marker CDH5 (P < 0.05). TLR2 methylation percentage negatively correlated with mRNA levels of IL-23 and CDH5 in apical periodontitis. Lower methylation frequencies of single CpG dinucleotides -8 and -10 localized in close proximity to nuclear factor κB (NFκB) binding within the TLR2 promoter were identified in SAP versus AAP (P < 0.05). Finally, unmethylated -10 and -8 single sites demonstrated up-regulation of IL-23, IL-10 and CDH5 transcripts compared to their methylated counterparts (P < 0.05). CONCLUSIONS TLR2 gene promoter hypomethylation was linked to transcriptional activity of pro-inflammatory cytokines and angiogenic markers in exacerbated periapical inflammation. Moreover, unmethylated single sites in close proximity to NFκB binding were involved in active transcription of IL-23, IL-10 and CDH5.
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Affiliation(s)
- A Fernández
- Laboratory of Periodontal Biology, Faculty of Dentistry, Universidad de Chile, Santiago, Chile.,Faculty of Dentistry, Universidad Andres Bello, Santiago, Chile
| | - P Veloso
- Laboratory of Periodontal Biology, Faculty of Dentistry, Universidad de Chile, Santiago, Chile
| | - J Astorga
- Laboratory of Periodontal Biology, Faculty of Dentistry, Universidad de Chile, Santiago, Chile
| | - C Rodríguez
- Faculty of Dentistry, Universidad Andres Bello, Santiago, Chile
| | - V A Torres
- Faculty of Dentistry, Universidad de Chile, Institute for Research in Dental Sciences, Santiago, Chile
| | - M Valdés
- School of Public Health, Faculty of Medicine, Universidad de Chile, Santiago, Chile
| | - M Garrido
- Laboratory of Periodontal Biology, Faculty of Dentistry, Universidad de Chile, Santiago, Chile
| | - P J Gebicke-Haerter
- Program of Immunology, Faculty of Medicine, Institute of Biomedical Sciences, Universidad de Chile, Santiago, Chile.,Institute of Psychopharmacology, Faculty of Medicine, Central Institute of Mental Health, University of Heidelberg, Mannheim, Germany
| | - M Hernández
- Laboratory of Periodontal Biology, Faculty of Dentistry, Universidad de Chile, Santiago, Chile.,Department of Pathology and Oral Medicine, Faculty of Dentistry, Universidad de Chile, Santiago, Chile
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Veloso P, Fernández A, Terraza-Aguirre C, Álvarez C, Vernal R, Escobar A, Hernández M. Macrophages skew towards M1 profile through reduced CD163 expression in symptomatic apical periodontitis. Clin Oral Investig 2020; 24:4571-81. [PMID: 32444919 DOI: 10.1007/s00784-020-03324-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Accepted: 05/01/2020] [Indexed: 02/06/2023]
Abstract
OBJECTIVES To explore the macrophage profiles in symptomatic and asymptomatic forms of AP through phenotypic and functional analyses. MATERIAL AND METHODS Cross-sectional study. Apical tissue/lesion samples were collected from patients with clinical diagnosis of AAP (n = 51) or SAP (n = 45) and healthy periodontal ligament (HPL) from healthy patients as controls (n = 14), all with indication of tooth extraction. Samples were digested, cells were stained for CD14, M1 (CD64, CD80), and M2 (CD163, CD206) phenotypic surface markers and analyzed by flow cytometry. Functional cytokine profiles L-6, IL-12, TNF-α, IL-23 (M1), IL-10, and TGF-β (M2) were determined by qPCR. RESULTS Higher macrophage M1/M2 ratio (CD64+CD80+/CD163+CD206+) along with lower CD163 mean fluorescence intensity (MFI) were found in SAP compared to AAP and controls (p < 0.05). IL-6, IL-12, TNF-α, IL-23 (M1), and IL-10 mRNA (M2) were upregulated, whereas TGF-β mRNA (M2) was downregulated in apical lesions compared to controls. Specifically, IL-6 and IL-23 (M1) were upregulated in SAP compared with AAP and controls (p < 0.05). The data were analyzed with Kruskal-Wallis test. CONCLUSIONS Macrophages exhibited a polarization switch towards M1 in AL. SAP exhibited a reduced M2 differentiation profile based on a reduction of CD163 expression levels in SAP over AAP. Specifically, IL-6 and IL-23 were augmented SAP over AAP, suggesting a role in the severity of apical lesions. CLINICAL RELEVANCE Deciphering the macrophage polarization and functions in apical periodontitis can contribute to explain AP dynamics, its clinical presentation and systemic impact.
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11
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Gu Y, Han X. Toll-Like Receptor Signaling and Immune Regulatory Lymphocytes in Periodontal Disease. Int J Mol Sci 2020; 21:ijms21093329. [PMID: 32397173 PMCID: PMC7247565 DOI: 10.3390/ijms21093329] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 04/30/2020] [Accepted: 05/04/2020] [Indexed: 12/27/2022] Open
Abstract
Periodontitis is known to be initiated by periodontal microbiota derived from biofilm formation. The microbial dysbiotic changes in the biofilm trigger the host immune and inflammatory responses that can be both beneficial for the protection of the host from infection, and detrimental to the host, causing tissue destruction. During this process, recognition of Pathogen-Associated Molecular Patterns (PAMPs) by the host Pattern Recognition Receptors (PRRs) such as Toll-like receptors (TLRs) play an essential role in the host–microbe interaction and the subsequent innate as well as adaptive responses. If persistent, the adverse interaction triggered by the host immune response to the microorganisms associated with periodontal biofilms is a direct cause of periodontal inflammation and bone loss. A large number of T and B lymphocytes are infiltrated in the diseased gingival tissues, which can secrete inflammatory mediators and activate the osteolytic pathways, promoting periodontal inflammation and bone resorption. On the other hand, there is evidence showing that immune regulatory T and B cells are present in the diseased tissue and can be induced for the enhancement of their anti-inflammatory effects. Changes and distribution of the T/B lymphocytes phenotype seem to be a key determinant of the periodontal disease outcome, as the functional activities of these cells not only shape up the overall immune response pattern, but may directly regulate the osteoimmunological balance. Therefore, interventional strategies targeting TLR signaling and immune regulatory T/B cells may be a promising approach to rebalance the immune response and alleviate bone loss in periodontal disease. In this review, we will examine the etiological role of TLR signaling and immune cell osteoclastogenic activity in the pathogenesis of periodontitis. More importantly, the protective effects of immune regulatory lymphocytes, particularly the activation and functional role of IL-10 expressing regulatory B cells, will be discussed.
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Affiliation(s)
- Yingzhi Gu
- Department of Immunology and Infectious Diseases, The Forsyth Institute, 245 First Street, Cambridge, MA 02142, USA;
| | - Xiaozhe Han
- Department of Immunology and Infectious Diseases, The Forsyth Institute, 245 First Street, Cambridge, MA 02142, USA;
- Department of Oral Medicine, Infection and Immunity, Harvard School of Dental Medicine, Boston, MA 02115, USA
- Correspondence:
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Wu X, Lu M, Ding S, Zhong Q. Tripartite motif 31 alleviates IL-1ß secretion via promoting the ubiquitination of pyrin domain domains-containing protein 3 in human periodontal ligament fibroblasts. Odontology 2020; 108:424-432. [PMID: 32323100 DOI: 10.1007/s10266-020-00519-7] [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: 10/18/2019] [Accepted: 12/11/2019] [Indexed: 12/29/2022]
Abstract
Apical periodontitis (AP) is an inflammatory disease caused by bacteria infection and is regarded as a common disease in the world. In the progression of AP, the function of nucleotide-binding oligomerization, leucine-rich repeat and pyrin domain domains-containing protein 3 (NLRP3) inflammasome has been revealed. Although tripartite motif 31 (TRIM31) has been suggested to regulate many chronic inflammations by mediating NLRP3 inflammasome, such mechanism in AP remains unclear. In this study, co-treatment of human periodontal ligament fibroblasts (HPDLFs) with lipopolysaccharides (LPS) and adenosine triphosphate (ATP) were conducted to establish AP cell model. ELISA assay was used to measure the concentration of secretive interleukin 1 beta (IL-1β). In addition, the expression levels of NLRP3 after TRIM31 up- or down-regulation were detected by real-time PCR and western blot. Immunoprecipitation was used to explore the interaction between TRIM31 and NLRP3. We found that co-treatment with LPS and ATP increased the secretion of IL-1β and expression of NLRP3 in HPDLFs, while TRIM31 overexpression could reverse these effects caused by LPS and ATP. Furthermore, the interaction between TRIM31 and NLRP3 was observed, and TRIM31 was found to promote the ubiquitination of NLRP3. TRIM31 may alleviate IL-1ß secretion caused by LPS and ATP via promoting the ubiquitination of NLRP3 and may exert an influence on the development of AP.
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Affiliation(s)
- Xueying Wu
- Yongjia Clinic, Shanghai Stomatological Hospital, Fudan University, No. 458 Yongjia Road, Shanghai, 200031, China
| | - Mengmeng Lu
- Department of Oral and Maxilofacial Surgery, Shanghai Stomatological Hospital, Fudan University, 1258 Middle Fuxing Road, Shanghai, 200031, China
| | - Sheng Ding
- Department of Stomatology, Xinhua Hospital Affiliated To Shanghai Jiaotong University of Medicine, 1665 Kongjiang Road, Shanghai, 200092, China
| | - Qun Zhong
- Yongjia Clinic, Shanghai Stomatological Hospital, Fudan University, No. 458 Yongjia Road, Shanghai, 200031, China.
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13
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Braz-Silva PH, Bergamini ML, Mardegan AP, De Rosa CS, Hasseus B, Jonasson P. Inflammatory profile of chronic apical periodontitis: a literature review. Acta Odontol Scand 2019; 77:173-180. [PMID: 30585523 DOI: 10.1080/00016357.2018.1521005] [Citation(s) in RCA: 88] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Apical periodontitis caused by root canal infection is the most frequent pathological lesion in the jaws, mainly manifested as periapical granulomas and cysts. Understanding of the formation and progression of apical periodontitis as well as the identification of inflammatory biomarkers can help increase the knowledge of pathogenic mechanisms, improve the diagnosis and provide support for different therapeutic strategies. The objective of the present article is to review inflammatory biomarkers such as cytokines, chemokines, inflammatory cells, neuropeptides, RANK/RANKL/OPG system and other inflammatory markers and to relate these systems to the development and progression of pathological conditions related to apical periodontitis.
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Affiliation(s)
- Paulo Henrique Braz-Silva
- Division of General Pathology, Department of Stomatology, School of Dentistry, University of Sao Paulo, Sao Paulo, Brazil
- Laboratory of Virology, Institute of Tropical Medicine of Sao Paulo, University of Sao Paulo, Sao Paulo, Brazil
| | - Mariana Lobo Bergamini
- Division of General Pathology, Department of Stomatology, School of Dentistry, University of Sao Paulo, Sao Paulo, Brazil
| | - Andressa Pinto Mardegan
- Division of General Pathology, Department of Stomatology, School of Dentistry, University of Sao Paulo, Sao Paulo, Brazil
| | - Catharina Simioni De Rosa
- Division of General Pathology, Department of Stomatology, School of Dentistry, University of Sao Paulo, Sao Paulo, Brazil
| | - Bengt Hasseus
- Department of Oral Medicine and Pathology, Institute of Odontology, The Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Peter Jonasson
- Department of Endodontology, Institute of Odontology The Sahlgrenska Academy University of Gothenburg, Gothenburg, Sweden
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14
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Dong M, Jin H, Zuo M, Bai H, Wang L, Shi C, Niu W. The potential effect of Bruton's tyrosine kinase in refractory periapical periodontitis. Biomed Pharmacother 2019; 112:108710. [PMID: 30818138 DOI: 10.1016/j.biopha.2019.108710] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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: 01/09/2019] [Revised: 02/06/2019] [Accepted: 02/19/2019] [Indexed: 01/17/2023] Open
Abstract
To determine the expression of Bruton's tyrosine kinase (BTK) in refractory periapical periodontitis and analyze the relationship between BTK and bone resorption in refractory periapical periodontitis. The mechanism of bone resorption is also discussed. The OneArray Plus expression microarray was used to screen for genes related to refractory periapical periodontitis. Real-time PCR was used to detect the expression of BTK in refractory periapical periodontitis tissues. A model of periapical periodontitis was established by sealing E.faecalis into the pulp of rats. To establish a model of E.faecalis LTA infection of osteoclasts, the relationship between BTK and bone destruction during refractory periapical periodontitis was analyzed. OneArray Plus expression microarray results showed that we found that the expression of 1787 genes in the two samples was different. After validating these samples, we found that BTK was closely related to refractory periapical periodontitis. The results showed that the expression of BTK in refractory periapical periodontitis tissues was higher than that in normal tissues. Immunohistochemistry, enzyme histochemistry and real-time PCR showed that the BTK expression curve in the experimental model resembled a reverse V shape from week 1 to week 4. Osteoclasts were cultured in vitro and treated with E. faecalis LTA. The expression of BTK in the E. faecalis model was greater than that in the control group. BTK played an important role in the progression of refractory periapical periodontitis.
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Affiliation(s)
- Ming Dong
- College of Basic Medical Sciences, Dalian Medical University, Dalian 116044, Liaoning, China.
| | - Haiwei Jin
- Department of Oral Anatomy and Physiology, Dalian Medical University, Dalian 116044, Liaoning, China.
| | - Meina Zuo
- Department of Endodontics and Periodontics, Dalian Medical University, Dalian 116044, Liaoning, China.
| | - Hua Bai
- Department of Endodontics and Periodontics, Dalian Medical University, Dalian 116044, Liaoning, China.
| | - Lina Wang
- Department of Endodontics and Periodontics, Dalian Medical University, Dalian 116044, Liaoning, China.
| | - Chun Shi
- Department of Endodontics and Periodontics, Dalian Medical University, Dalian 116044, Liaoning, China.
| | - Weidong Niu
- Department of Endodontics and Periodontics, Dalian Medical University, Dalian 116044, Liaoning, China.
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15
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Fernández A, Cárdenas AM, Astorga J, Veloso P, Alvarado A, Merino P, Pino D, Reyes-court D, Hernández M. Expression of Toll-like receptors 2 and 4 and its association with matrix metalloproteinases in symptomatic and asymptomatic apical periodontitis. Clin Oral Investig 2019; 23:4205-12. [DOI: 10.1007/s00784-019-02861-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Accepted: 02/14/2019] [Indexed: 02/06/2023]
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Jakovljevic A, Miletic M, Nikolic N, Beljic-Ivanovic K, Andric M, Milasin J. Notch signaling pathway mediates alveolar bone resorption in apical periodontitis. Med Hypotheses 2019; 124:87-90. [PMID: 30798925 DOI: 10.1016/j.mehy.2019.02.018] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Accepted: 02/02/2019] [Indexed: 02/06/2023]
Abstract
Apical periodontitis represents a chronic inflammatory process within periapical tissues, mostly caused by etiological agents of endodontic origin. Progressive bone resorption in the periapical region represents the hallmark of apical periodontitis and occurs as the consequence of interplay between polymicrobial infections and host response. The Notch signaling pathway is an evolutionary conserved cell-signaling system that plays an important role in a variety of cell functions including proliferation, differentiation and apoptosis. In recent years its involvement in bone homeostasis has attracted a significant consideration. We hypothesized that Notch signaling pathway, which has a complex interplay with proinflammatory cytokines and bone resorption regulators, contributes to alveolar bone resorption via increased Notch receptors on immune cell surface and stimulates Notch receptor intracellular domain (NICD) translocation into the nucleus. The potential benefit of medications aimed to down-regulate these pathways in apical periodontitis treatment remains to be assessed.
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Affiliation(s)
- Aleksandar Jakovljevic
- Department of Pathophysiology, School of Dental Medicine, University of Belgrade, dr. Subotica 1, 11 000 Belgrade, Serbia.
| | - Maja Miletic
- Department of Pathophysiology, School of Dental Medicine, University of Belgrade, dr. Subotica 1, 11 000 Belgrade, Serbia
| | - Nadja Nikolic
- Department of Human Genetics, School of Dental Medicine, University of Belgrade, dr. Subotica 1, 11 000 Belgrade, Serbia
| | - Katarina Beljic-Ivanovic
- Department of Restorative Odontology and Endodontics, School of Dental Medicine, University of Belgrade, Rankeova 4, 11 000 Belgrade, Serbia
| | - Miroslav Andric
- Department of Oral Surgery, School of Dental Medicine, University of Belgrade, dr Subotica 4, 11 000 Belgrade, Serbia
| | - Jelena Milasin
- Department of Human Genetics, School of Dental Medicine, University of Belgrade, dr. Subotica 1, 11 000 Belgrade, Serbia
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Nikolic N, Jakovljevic A, Carkic J, Beljic-Ivanovic K, Miletic M, Soldatovic I, Andric M, Ivanovic V, Milasin J. Notch Signaling Pathway in Apical Periodontitis: Correlation with Bone Resorption Regulators and Proinflammatory Cytokines. J Endod 2019; 45:123-128. [DOI: 10.1016/j.joen.2018.10.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Revised: 09/25/2018] [Accepted: 10/28/2018] [Indexed: 02/06/2023]
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18
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Barreiros D, Pucinelli CM, Oliveira KMHD, Paula-Silva FWG, Nelson Filho P, Silva LABD, Küchler EC, Silva RABD. Immunohistochemical and mRNA expression of RANK, RANKL, OPG, TLR2 and MyD88 during apical periodontitis progression in mice. J Appl Oral Sci 2018; 26:e20170512. [PMID: 29995146 PMCID: PMC6025885 DOI: 10.1590/1678-7757-2017-0512] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [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: 11/06/2017] [Accepted: 03/26/2018] [Indexed: 01/18/2023] Open
Abstract
Objective To evaluate and correlate, in the same research, the mRNA expression and the staining of RANK, RANKL, OPG, TLR2 and MyD88 by immunohistochemistry in the apical periodontitis (AP) progression in mice. Material and Methods AP was induced in the lower first molars of thirty-five C57BL/6 mice. They were assigned to four groups according to their euthanasia periods (G0, G7, G21 and G42). The jaws were removed and subjected to histotechnical processing, immunohistochemistry and real-time reverse transcription-PCR (qRT-PCR). Data were analyzed with parametric and nonparametric tests (α=0.05). Results An increase of positive immunoreactivity for RANK, RANKL, OPG, TLR2 and MyD88 was observed over time (p<0.05). The RANKL expression was different between the groups G0 and G42, G21 and G42 (p=0.006), with G42 presenting the higher expression in both comparations. The OPG expression was statistically different between the groups G0 and G7, G7 and G21 and G7 and G42 (p<0.001), with G7 presenting higher expression in all the time points. The TLR2 expression was different between the groups G0 and G42 (p=0.03), with G42 showing the higher expression. The MyD88 expression presented a statistical significant difference between groups G7, G21 and G42 compared with G0 (p=0.01), with G0 presenting the smallest expression in all the comparisons. The Tnfrsf11/Tnfrsf11b (RANKL/OPG) ratio increased with the AP progression (p=0.002). A moderate positive correlation between MyD88 and RANKL (r=0.42; p=0.03) and between MyD88 and TLR2 (r=0.48; p<0.0001) was observed. Conclusion The expression of the RANK, RANKL, OPG, MyD88 and TLR2 proteins as well as the ratio Tnfrsf11/Tnfrsf11b (RANKL/OPG) increased with AP progression. There was also a moderate positive correlation between the expression Myd88-Tnfrsf11 and Tlr2-Myd88, suggesting the relevance of Tlr2-Myd88 in bone loss due to bacterial infection.
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Affiliation(s)
- Driely Barreiros
- Universidade de São Paulo, Faculdade de Odontologia de Ribeirão Preto, Departamento de Clínica Infantil, Ribeirão Preto, São Paulo, Brasil
| | - Carolina Maschietto Pucinelli
- Universidade de São Paulo, Faculdade de Odontologia de Ribeirão Preto, Departamento de Clínica Infantil, Ribeirão Preto, São Paulo, Brasil
| | | | | | - Paulo Nelson Filho
- Universidade de São Paulo, Faculdade de Odontologia de Ribeirão Preto, Departamento de Clínica Infantil, Ribeirão Preto, São Paulo, Brasil
| | - Lea Assed Bezerra da Silva
- Universidade de São Paulo, Faculdade de Odontologia de Ribeirão Preto, Departamento de Clínica Infantil, Ribeirão Preto, São Paulo, Brasil
| | - Erika Calvano Küchler
- Universidade de São Paulo, Faculdade de Odontologia de Ribeirão Preto, Departamento de Clínica Infantil, Ribeirão Preto, São Paulo, Brasil
| | - Raquel Assed Bezerra da Silva
- Universidade de São Paulo, Faculdade de Odontologia de Ribeirão Preto, Departamento de Clínica Infantil, Ribeirão Preto, São Paulo, Brasil
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Cheng R, Feng Y, Zhang R, Liu W, Lei L, Hu T. The extent of pyroptosis varies in different stages of apical periodontitis. Biochim Biophys Acta Mol Basis Dis 2018; 1864:226-237. [DOI: 10.1016/j.bbadis.2017.10.025] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Revised: 10/02/2017] [Accepted: 10/19/2017] [Indexed: 01/28/2023]
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