1
|
Bozgeyik E, Ege B, Erdogmus Z, Bozgeyik I, Koparal M, Bayazit S, Kurt MY. Inflammation-associated long non-coding RNA signature in radicular cyst tissues. Pathol Res Pract 2023; 245:154456. [PMID: 37116367 DOI: 10.1016/j.prp.2023.154456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 04/05/2023] [Accepted: 04/07/2023] [Indexed: 04/30/2023]
Abstract
Radicular cysts are characterized by significant levels of changes in inflammatory biomarkers. Among them, interleukins and growth factors have been reported to be deregulated in radicular cyst tissues. Moreover, long non-coding RNAs are recently discovered non-coding RNA molecules that regulate various intracellular stimuli to keep homeostasis in balance. A growing body of evidence suggests that lncRNAs are significantly involved in the regulation of inflammation by targeting various inflammatory biomarkers. Accordingly, the present study was aimed to investigate the gene expression levels of inflammation-related lncRNAs in radicular cysts and show their possible roles in the development of radicular cysts. For the study, a total of 25 patients with a radiologically and pathologically confirmed radicular cyst were enrolled. For the determination of non-coding RNA expression levels, real-time qPCR was used. As a result of the current study, expression levels of PACER and THRIL were found to be significantly elevated in radicular cyst tissues compared to control tissue samples. However, MALAT1, ANRIL, and NEAT1 expression levels were not significantly altered in radicular cyst tissues compared to control tissue samples. In conclusion, long non-coding RNAs, PACER and THRIL, seem to have significant pathophysiological roles by acquiring molecular changes during inflammation and might be involved in the development and formation of radicular cysts.
Collapse
Affiliation(s)
- Esra Bozgeyik
- Department of Medical Services and Techniques, Vocational School of Health Services, Adiyaman University, Adiyaman, Turkey.
| | - Bilal Ege
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Adiyaman University, Adiyaman, Turkey
| | - Zozan Erdogmus
- Oral and Maxillofacial Surgery Clinic, Diyarbakir Oral and Dental Health Center, Diyarbakir, Turkey
| | - Ibrahim Bozgeyik
- Department of Medical Biology, Faculty of Medicine, Adiyaman University, Adiyaman, Turkey
| | - Mahmut Koparal
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Adiyaman University, Adiyaman, Turkey
| | - Seyma Bayazit
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Adiyaman University, Adiyaman, Turkey
| | - Muhammed Yusuf Kurt
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Adiyaman University, Adiyaman, Turkey
| |
Collapse
|
2
|
de Oliveira NG, da Silveira MT, da Silva LP, Barros KMA, Costa LM, Soares MDL, Carvalho MDV. Morphological analysis and immunohistochemical expression in restorations with self-adhesive resin: A randomized split-mouth design-controlled study. J Clin Exp Dent 2021; 13:e927-e934. [PMID: 34603622 PMCID: PMC8464382 DOI: 10.4317/jced.58413] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 05/24/2021] [Indexed: 01/26/2023] Open
Abstract
Background To evaluate the morphology and immunohistochemical expression of MMP-9, TIMP-3, COL-I, TNF-alfa and COX-2 in the dentinopulp complex of restorations with self adhesive composite (Vertise Flow/Kerr) compared with conventional resin composite with self-etching adhesive (Filtek Z250/3M ESPE and Clearfil SE Bond/Kuraray-Noritake). Material and Methods A randomized, controlled, double-blind, split-mouth, two-arm clinical trial was conducted. Twenty-seven volunteers with third molars indicated for extraction received two deep class I restorations, one with each material. The morphology and immunohistochemical expression were measured at 15 days after the restorative procesures. The data were submitted to the Fisher`s Exct test (α=0.05). Results Through morphological analysis, a slight disorganization of the odontoblastic layer was visualized, along with a slight inflammatory infiltrate in the VERT and CSEB groups (p< 0.05). In immunohistochemical analysis, TNF-alpha, MMP-9, TIMP-3 and COX-2 demonstrated more cases of positive pulp labeling. Conclusions Self-adhesive resin composite and conventional resin composite with a self-etching bonding agent promoted slight alterations in the dentin-pulp complex, indicating a repair ability and reversibility of the inflammatory process against aggressions of the adhesive restorative procedure. Key words:Immunohistochemistry, inflammation, randomized clinical trial, self-adhering composite, dentistry.
Collapse
Affiliation(s)
| | | | - Leorik-Pereira da Silva
- MSc, PhD, Adjunct Professor, Dental School, Universidade Federal de Campina Grande (UFCG), PB, Brazil
| | | | - Laís-Maciel Costa
- MSc, PhD student, Dental School, Universidade de Pernambuco/FOP-UPE; Camaragibe, PE, Brazil
| | | | | |
Collapse
|
3
|
Bertasso AS, Léon JE, Silva RAB, Silva LAB, Queiroz AM, Pucinelli CM, Romualdo PC, Nelson‐Filho P. Immunophenotypic quantification of M1 and M2 macrophage polarization in radicular cysts of primary and permanent teeth. Int Endod J 2020; 53:627-635. [DOI: 10.1111/iej.13257] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 11/21/2019] [Accepted: 11/22/2019] [Indexed: 12/11/2022]
Affiliation(s)
- A. S. Bertasso
- Department of Pediatric DentistrySchool of Dentistry of Ribeirão PretoUniversity of São Paulo Ribeirão PretoSPBrazil
| | - J. E. Léon
- Department of Stomatology, Public Oral Health and Forensic Dentistry School of Dentistry of Ribeirão Preto University of São Paulo Ribeirão Preto SP Brazil
| | - R. A. B. Silva
- Department of Pediatric DentistrySchool of Dentistry of Ribeirão PretoUniversity of São Paulo Ribeirão PretoSPBrazil
| | - L. A. B. Silva
- Department of Pediatric DentistrySchool of Dentistry of Ribeirão PretoUniversity of São Paulo Ribeirão PretoSPBrazil
| | - A. M. Queiroz
- Department of Pediatric DentistrySchool of Dentistry of Ribeirão PretoUniversity of São Paulo Ribeirão PretoSPBrazil
| | - C. M. Pucinelli
- Department of Pediatric DentistrySchool of Dentistry of Ribeirão PretoUniversity of São Paulo Ribeirão PretoSPBrazil
| | - P. C. Romualdo
- Department of Pediatric DentistrySchool of Dentistry of Ribeirão PretoUniversity of São Paulo Ribeirão PretoSPBrazil
| | - P. Nelson‐Filho
- Department of Stomatology, Public Oral Health and Forensic Dentistry School of Dentistry of Ribeirão Preto University of São Paulo Ribeirão Preto SP Brazil
| |
Collapse
|
4
|
Álvares PR, de Arruda JAA, Oliveira Silva LV, da Silva LP, do Nascimento GJF, da Silveira MMF, Sobral APV. Immunohistochemical Analysis of Cyclooxygenase-2 and Tumor Necrosis Factor Alpha in Periapical Lesions. J Endod 2018; 44:1783-1787. [DOI: 10.1016/j.joen.2018.09.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Revised: 08/22/2018] [Accepted: 09/06/2018] [Indexed: 12/19/2022]
|
5
|
Lin PS, Cheng RH, Chang MC, Lee JJ, Chang HH, Huang WL, Yeung SY, Chang YC, Jeng JH. TGF-β1 stimulates cyclooxygenase-2 expression and PGE 2 production of human dental pulp cells: Role of ALK5/Smad2 and MEK/ERK signal transduction pathways. J Formos Med Assoc 2017; 116:748-754. [DOI: 10.1016/j.jfma.2017.07.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 07/16/2017] [Accepted: 07/18/2017] [Indexed: 12/18/2022] Open
|
6
|
Alsaegh MA, Miyashita H, Taniguchi T, Zhu SR. Odontogenic epithelial proliferation is correlated with COX-2 expression in dentigerous cyst and ameloblastoma. Exp Ther Med 2016; 13:247-253. [PMID: 28123497 DOI: 10.3892/etm.2016.3939] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Accepted: 09/09/2016] [Indexed: 12/14/2022] Open
Abstract
Investigation of cyclooxygenase (COX)-2 in dentigerous cyst and ameloblastoma may help to improve understanding of the nature and behavior of odontogenic cysts and tumors, and in addition may eventually represent a definitive target for a pharmacological approach in the management of these lesions. The aim of this study was to evaluate COX-2 expression and its correlation with the proliferation of odontogenic epithelium in these lesions. Dentigerous cysts (n=16) and ameloblastomas (n=17) were evaluated. Detection of Ki-67 and COX-2 protein expression was conducted by immunohistochemistry. Data were statistically analyzed using Mann-Whitney U test and Spearman's rank correlation coefficient. No significant differences were found in the expression of Ki-67 and COX-2 between dentigerous cysts and ameloblastomas (P>0.05). A significant positive correlation (P=0.018) and highly significant positive correlation (P=0.004) were found between Ki-67 and COX-2 expression in the odontogenic epithelium of dentigerous cyst and ameloblastoma, respectively. COX-2 was expressed in the odontogenic epithelium of dentigerous cyst and ameloblastoma. It may contribute to local extension of these lesions by increasing the proliferation of their odontogenic epithelial cells.
Collapse
Affiliation(s)
- Mohammed Amjed Alsaegh
- Department of Oral and Maxillofacial Surgery, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, P.R. China; Department of Oral and Maxillofacial Surgery, College of Dentistry, Ajman University, Al-Hulifat, Fujairah 2202, UAE; Department of Oral and Maxillofacial Surgery, College of Dentistry, University of Mosul, Mosul, Ninavah 41002, Iraq
| | - Hitoshi Miyashita
- Department of Oral and Maxillofacial Surgery, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, P.R. China; Department of Oral Medicine and Surgery, Division of Oral and Maxillofacial Surgery, Graduate School of Dentistry, Tohoku University, Sendai 980-8575, Japan
| | - Takahiro Taniguchi
- Department of Oral Medicine and Surgery, Division of Oral and Maxillofacial Surgery, Graduate School of Dentistry, Tohoku University, Sendai 980-8575, Japan
| | - Sheng Rong Zhu
- Department of Oral and Maxillofacial Surgery, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, P.R. China
| |
Collapse
|
7
|
Estrela C, Freitas Silva BS, Silva JA, Yamamoto-Silva FP, Pinto-Júnior DDS, Gomez RS. Stem Cell Marker Expression in Persistent Apical Periodontitis. J Endod 2016; 43:63-68. [PMID: 27847139 DOI: 10.1016/j.joen.2016.09.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Revised: 08/22/2016] [Accepted: 09/02/2016] [Indexed: 11/29/2022]
Abstract
INTRODUCTION This study evaluated the expression of CD90 (mesenchymal stem cell) and Sox2 (progenitor stem cell) markers in persistent apical periodontitis (PAP) (n = 16) and primary periapical lesions (PPLs) (n = 10). METHODS All samples were classified histologically according to the intensity of inflammatory cell infiltrate in the periapical lesion. Immunohistochemistry was used to detect CD90 and Sox2 in PAP and PPLs. The Spearman correlation coefficient and the Mann-Whitney U test were used to analyze data at the 5% significance level. RESULTS CD90 expression was found in mesenchymal cells and vascular endothelial cells of 68.5% of all cases of PAP. There was no correlation between CD90 expression and histopathological diagnosis (P = .053) or inflammatory cell infiltrate intensity (P = .112). CD90 staining was predominantly found in the vascular endothelial cells of 30% (n = 3) of PPLs. CD90 expression was significantly higher in PAP than in PPLs (Mann-Whitney U test, P < .05). Sox2 expression was found in all cases of PAP. Eventually, all mesenchymal and chronic inflammatory cells exhibited Sox2 expression. There was no correlation between Sox2 expression and histopathological diagnoses (P = .749), inflammatory cell infiltrate intensity (P = .510), or acute or chronic inflammatory cell infiltrate (P = .256). Sox2 expression was found in 100% of PPLs. There was no difference in Sox2 expression between PAP and PPLs (P = .477). CONCLUSIONS Mesenchymal stem cells may contribute to the immunosuppressive environment in PAP. Additionally, distinct stem cell sources may be associated with the chronic nature of PAP as well as with the development of PPLs.
Collapse
Affiliation(s)
- Carlos Estrela
- Department of Stomatologic Sciences, School of Dentistry, Federal University of Goiás, Goiânia, Brazil.
| | | | - Júlio A Silva
- Department of Stomatologic Sciences, School of Dentistry, Federal University of Goiás, Goiânia, Brazil
| | - Fernanda P Yamamoto-Silva
- Department of Stomatologic Sciences, School of Dentistry, Federal University of Goiás, Goiânia, Brazil
| | | | - Ricardo Santiago Gomez
- Department of Oral Surgery and Pathology, School of Dentistry, Federal University of Minas Gerais, Belo Horizonte, Brazil
| |
Collapse
|
8
|
Alsaegh MA, Miyashita H, Zhu SR. Expression of human papillomavirus is correlated with Ki-67 and COX-2 expressions in keratocystic odontogenic tumor. Pathol Oncol Res 2014; 21:65-71. [PMID: 24831259 DOI: 10.1007/s12253-014-9789-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Accepted: 04/20/2014] [Indexed: 01/18/2023]
Abstract
The aim of the current study was to investigate the presence of human papillomavirus (HPV) and evaluate its association with Ki-67 and cyclooxygenase-2 (COX-2) expressions in keratocystic odontogenic tumor (KCOT). Nineteen cases were included in the present study. Conventional PCR method and immunohistochemical analysis were performed for the detection of HPV-DNA and HPV-L1 capsid protein. Moreover, the expressions of Ki-67 and COX-2 proteins were analyzed immunohistochemically. HPV-DNA was detected in 36.8% (7/19) of tumor samples, whilst HPV-L1 protein was identified in 68.4% (13/19) of them. The Kappa coefficient statistical test showed a moderate agreement (κ 0.424) between PCR and IHC assays for HPV detection. Expression of HPV-DNA was positively correlated with Ki-67 and COX-2 expressions (p < 0.05), whereas HPV-L1 positive staining was positively correlated with COX-2 (p < 0.05) and highly associated with those of Ki-67 (p < 0.01). There was no significant correlation between the presence of HPV and the recurrence of the studied lesions. The results of the current study showed that active HPV infection was present in the odontogenic epithelium of KCOT, and it was associated with increased proliferation rate and COX-2 expression. These findings suggest that HPV may have a role in the pathogenesis and aggressiveness of KCOT. Based on these conclusions, we recommend further investigations of HPV vaccine or antiviral therapy and COX-2 inhibitors as nonsurgical options in the prevention and management of KCOT.
Collapse
Affiliation(s)
- Mohammed Amjed Alsaegh
- Department of Stomatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China,
| | | | | |
Collapse
|
9
|
Ho YC, Huang FM, Lee SS, Chang YC. The regulation of cytotoxicity and cyclooxygenase-2 expression by 2-hydroxy-ethyl methacrylate in human osteoblasts are related to intracellular glutathione levels. Int Endod J 2013; 47:784-90. [PMID: 24245513 DOI: 10.1111/iej.12218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2012] [Accepted: 11/14/2013] [Indexed: 11/28/2022]
Abstract
AIM To investigate the effects of 2-hydroxy-ethyl methacrylate (HEMA) on cytotoxicity and cyclooxygenase-2 (COX-2) protein expression in human osteoblasts. METHODOLOGY Cytotoxicity was judged using an Alamar Blue reduction assay on human osteoblast cell line U2OS. Western blot was used to evaluate the expression of COX-2 protein by HEMA. To determine whether glutathione (GSH) levels were important in cytotoxicity and COX-2 expression of HEMA, cells were pre-treated with the GSH precursor, 2-oxothiazolidine-4-carboxylic acid (OTZ), to boost thiol levels, or buthionine sulfoximine (BSO) to deplete GSH. Paired Student's t-tests were applied for the statistical analysis of the results. RESULTS HEMA demonstrated a cytotoxic effect to U2OS cells in a dose-dependent manner (P < 0.05). The 50% inhibition concentration of HEMA was approximately 3 mmol L(-1) . HEMA was found to induce COX-2 protein expression in U2OS cells (P < 0.05). The addition of OTZ acted as a protective effect on HEMA-induced cytotoxicity and COX-2 expression (P < 0.05). In contrast, the addition of BSO enhanced HEMA-induced cytotoxicity and COX-2 expression (P < 0.05). CONCLUSION Taken together, the levels of HEMA that were tested inhibited cell growth on U2OS cells. HEMA has a significant potential for periapical toxicity. The activation of COX-2 protein expression may be one of the mechanisms of HEMA-induced periapical inflammation. These inhibitory effects were associated with intracellular GSH levels.
Collapse
Affiliation(s)
- Y-C Ho
- School of Applied Chemistry, Chung Shan Medical University, Taichung, Taiwan
| | | | | | | |
Collapse
|
10
|
Tsai CH, Huang FM, Chang YC. Immunohistochemical localization of oncostatin M in epithelialized apical periodontitis lesions. Int Endod J 2008; 41:772-6. [DOI: 10.1111/j.1365-2591.2008.01430.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
11
|
Tsai CH, Chen YJ, Huang FM, Su YF, Chang YC. The Upregulation of Matrix Metalloproteinase-9 in Inflamed Human Dental Pulps. J Endod 2005; 31:860-2. [PMID: 16306818 DOI: 10.1097/01.don.0000164851.55389.4e] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The matrix metalloproteinases (MMPs) participate in a wide variety of extracellular matrix degradation. Detailed knowledge of MMPs may be important for understanding the pathogenesis of pulpal inflammation. The purpose of this study was to compare MMP-9 expression in clinically healthy human pulp and inflamed human pulp tissue specimens. We compared the levels of MMP-9 between clinically healthy pulp and inflamed pulp tissues by using the semi-quantitative reverse-transcriptase polymerase chain reaction analysis. In addition, immunohistochemistry was used to identify the in situ localization of MMP-9 expression in pulp specimens. MMP-9 mRNA gene was found to be increased in inflamed pulps as compared with clinically healthy pulp tissues (p < 0.05). The results from immunohistochemistry demonstrated that MMP-9 expression was significantly higher in the inflamed pulps than clinically healthy pulps (p < 0.05). MMP-9 stain was detected in the odontoblasts, fibroblasts, inflammatory infiltrates, and endothelial cells. Taken together, MMP-9 may play an important role in the pathogenesis of pulpal inflammation.
Collapse
Affiliation(s)
- Chung-Hung Tsai
- Department of Pathology, Chung Shan Medical University Hospital, Taichung, Taiwan
| | | | | | | | | |
Collapse
|
12
|
Huang FM, Tsai CH, Ding SJ, Chang YC. Induction of cyclooxygenase-2 expression in human pulp cells stimulated by dentin bonding agents. ACTA ACUST UNITED AC 2005; 100:501-6. [PMID: 16182172 DOI: 10.1016/j.tripleo.2004.11.046] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2004] [Accepted: 11/09/2004] [Indexed: 11/16/2022]
Abstract
OBJECTIVES Histological investigations have demonstrated that dentin bonding agents can induce pulpal inflammation. However, there is little information on the precise mechanisms about dentin bonding agent-induced pulpal inflammation. Cyclooxygenase-2 (COX-2) is an inducible enzyme believed to be responsible for prostaglandin synthesis at the site of inflammation. The aim of this study was to investigate the effects of dentin bonding agents on the expression of COX-2 in human pulp cells. STUDY DESIGN Human pulp cells were cultured from extracted impacted third molars using an explant technique. Patients gave informed consent. The reverse-transcriptase polymerase chain reaction and Western blot assays were used to investigate the effects of cultured human pulp cells exposed to dentin bonding agents. In addition, NS-398 (a selective COX-2 inhibitor) was added to test how it modulated the cytotoxic effects of dentin bonding agents. RESULTS The exposure of quiescent human pulp cells to dentin bonding agents resulted in the induction of COX-2 mRNA and protein expression. The expression of COX-2 signals depended on the materials tested. In addition, NS-398 at noncytotoxic dose was not able to prevent dentin bonding agent-induced cytotoxicity (P > .05). CONCLUSION The activation of COX-2 expression may be one of the pathogenesis of dentin bonding agent-induced pulpal inflammation. In addition, dentin bonding agent-induced cytotoxicity is not directly via the induction of COX-2 expression.
Collapse
Affiliation(s)
- Fu-Mei Huang
- Oral Medicine Center, Chung Shan Medical University Hospital, Taichung, Taiwan
| | | | | | | |
Collapse
|
13
|
Huang FM, Tsai CH, Chen YJ, Liu CM, Chou MY, Chang YC. Upregulation of tissue-type plasminogen activator in inflamed human dental pulps. Int Endod J 2005; 38:328-33. [PMID: 15876297 DOI: 10.1111/j.1365-2591.2005.00951.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
AIM To compare tissue-type plasminogen activator (t-PA) expression in normal human pulp and inflamed human pulp tissue specimens. METHODOLOGY Thirty pulpal tissue specimens (13 normal and 17 inflamed pulps) were obtained from extracted third molars. The levels of t-PA between normal pulp and inflamed pulp tissues were compared using the quantitative reverse-transcriptase polymerase chain reaction analysis. In addition, immunohistochemistry was used to identify the in situ localization of t-PA expression in pulp specimens. Wilcoxon-Mann-Whitney rank sum test was applied for the statistical analysis of the results. RESULTS t-PA mRNA gene was found more in inflamed pulps when compared with normal pulp tissue (P<0.05). The results from immunohistochemistry demonstrated that t-PA expression was significantly higher in the inflamed pulp (P=0.025). t-PA stain was detected in the fibroblasts, inflammatory infiltrates and endothelial cells. CONCLUSIONS t-PA expression was significantly higher in inflamed pulp tissue. t-PA may play an important role in the pathogenesis of pulpal inflammation.
Collapse
Affiliation(s)
- F-M Huang
- Oral Medicine Center, Chung Shan Medical University Hospital, Taichung, Taiwan
| | | | | | | | | | | |
Collapse
|
14
|
Huang FM, Chang YC. Prevention of the epoxy resin-based root canal sealers-induced cyclooxygenase-2 expression and cytotoxicity of human osteoblastic cells by various antioxidants. Biomaterials 2005; 26:1849-55. [PMID: 15576159 DOI: 10.1016/j.biomaterials.2004.06.037] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2004] [Accepted: 06/25/2004] [Indexed: 10/26/2022]
Abstract
Cyclooxygenase-2 (COX-2) is an inducible enzyme believed to be responsible for prostaglandin synthesis at the site of inflammation. Recently, the activation of COX-2 expression may be one of the important pathogenesis of root canal sealers-induced periapical inflammation. However, little is known about whether chemical interaction can modulate the epoxy resin-based root canal sealers-induced cytotoxicity as well as COX-2 expression. The aim of the present study was to investigate the effects of antioxidants catalase, superoxide dismutase (SOD), and N-acetyl-L-cysteine (NAC) on AH26- and Topseal-induced COX-2 mRNA gene and cytotoxicity in human osteoblastic cell line U2OS cells. The results showed that both epoxy resin-based root canal sealers were cytotoxic to U2OS cells in a concentration-dependent manner (p<0.05). AH26 and Topseal were found to induce COX-2 mRNA gene expression in U2OS cells. The addition of glutathione (GSH) precursor NAC led to decrease the induction of COX-2 mRNA gene expression and cytotoxicity by both AH26 and Topseal (p<0.05). However, catalase and SOD lacked the ability to prevent AH26-and Topseal-induced cytotoxicity and COX-2 mRNA gene expression (p>0.05). Taken together, the activation of COX-2 mRNA gene expression may be one of the pathogenesis of epoxy resin-based root canal sealers-induced periapical inflammation. In addition, GSH depletion, but not the attack of oxygen free radicals, could be the mechanism for epoxy resin-based root canal sealers-induced cytotoxicity and COX-2 mRNA gene expression. Factors that induce GSH synthesis may appear useful in preventing cell damage mediated by epoxy resin-based root canal sealers.
Collapse
Affiliation(s)
- Fu-Mei Huang
- Department of Prosthodontics, Oral Medicine Center, Chung Shan Medical University Hospital, Taichung, Taiwan
| | | |
Collapse
|
15
|
Lukić A, Danilović V, Petrović R. Imunopatogenetski mehanizmi nastanka i razvoja hronicnih zubnih periapeksnih lezija. VOJNOSANIT PREGL 2005; 62:219-26. [PMID: 15790051 DOI: 10.2298/vsp0503219l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
|
16
|
Huang FM, Chou LSS, Chou MY, Chang YC. Protective effect of NAC on formaldehyde-containing-ZOE-based root-canal-sealers-induced cyclooxygenase-2 expression and cytotoxicity in human osteoblastic cells. J Biomed Mater Res B Appl Biomater 2005; 74:768-73. [PMID: 15934011 DOI: 10.1002/jbm.b.30283] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Cyclooxygenase-2 (COX-2) is an inducible enzyme believed to be responsible for prostaglandin synthesis at site of inflammation. Recently, the activation of COX-2 expression may be one of the important pathogenesis of root-canal-sealers-induced periapical inflammation. However, little is known about whether chemical interaction can modulate the COX-2 expression and cytotoxicity induced by formaldehyde-containing-ZOE-based root canal sealers. The aim of this study was to investigate the effects of antioxidants such as catalase, superoxide dismutase (SOD), and N-acetyl-L-cysteine (NAC) on N2- and endomethasone-induced COX-2 mRNA gene and cytotoxicity in human osteoblastic cell line U2OS cells. Our data demonstrated that both formaldehyde-containing-ZOE-based root canal sealers were found to induce COX-2 mRNA gene expression in U2OS cells. The addition of glutathione (GSH) precursor NAC led to decrease the induction of COX-2 mRNA gene expression and cytotoxicity by both N2 and Endomethasone (p < 0.05). However, catalase and SOD lacked the ability to prevent cytotoxicity and COX-2 mRNA gene expression induced by N2 and Endomethasone (p > 0.05). The data presented here demonstrated that the activation of COX-2 mRNA gene expression may be one of the pathogenesis of formaldehyde-containing-ZOE-based root-canal-sealers-induced periapical inflammation. In addition, GSH depletion, but not the attack of oxygen free radicals, could be the mechanism for cytotoxicity and COX-2 mRNA gene expression induced by formaldehyde-containing-ZOE-based root canal sealers. NAC appears as a useful agent in protecting cell damage mediated by formaldehyde-containing-ZOE-based root canal sealers.
Collapse
Affiliation(s)
- Fu-Mei Huang
- Department of Prosthodontics, Oral Medicine Center, Chung Shan Medical University Hospital, Taichung, Taiwan
| | | | | | | |
Collapse
|
17
|
Huang FM, Chang YC. Induction of cyclooxygenase-2 mRNA and protein expression by dentin bonding agents in human gingival fibroblasts. ACTA ACUST UNITED AC 2004; 70:297-302. [PMID: 15264312 DOI: 10.1002/jbm.b.30045] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
An ideal dentin bonding agent should be nonirritating to surrounding tissues. Unfortunately, all histological investigations have demonstrated that dentin bonding agents can induce mild to severe inflammatory alterations. However, there is little information on the precise mechanisms about dentin bonding agents-induced inflammatory reaction. Cyclooxygenase-2 (COX-2) is an inducible enzyme believed to be responsible for prostaglandin synthesis at the site of inflammation. The aim of the present study was to investigate the effects of three dentin bonding agents, Clearfil SE Bond, Prime & Bond NT, and Single Bond on the expression of COX-2 mRNA gene and protein in cultured human gingival fibroblasts. The exposure of quiescent human gingival fibroblasts to dentin bonding agents resulted in the induction of COX-2 mRNA expression. The investigations of the time-dependent on COX-2 mRNA expression in dentin bonding agent-treated human gingival fibroblasts revealed different patterns. The influence of COX-2 mRNA depended on the tested materials. In addition, all dentin bonding agents also induced COX-2 protein expression in human gingival fibroblasts. Taken together, the activation of COX-2 expression may be one of the potential mechanisms of dentin bonding agent-induced gingival inflammation.
Collapse
Affiliation(s)
- Fu-Mei Huang
- Department of Prosthodontics, Oral Medicine Center, Chung Shan Medical University Hospital, Taichung, Taiwan
| | | |
Collapse
|
18
|
Huang FM, Chou MY, Chang YC. Induction of cyclooxygenase-2 mRNA and protein expression by epoxy resin and zinc oxide-eugenol based root canal sealers in human osteoblastic cells. Biomaterials 2003; 24:1869-75. [PMID: 12615477 DOI: 10.1016/s0142-9612(02)00584-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
An ideal root canal sealer should be nonirritating to the surrounding tissues. Unfortunately, all histological investigation demonstrated that all types of root canal sealer can induce mild to severe inflammatory alternations. However, there is little information on the precise mechanisms about root canal sealers-induced inflammatory reaction. Cyclooxygenase-2 (COX-2) is an inducible enzyme believed to be responsible for prostaglandin synthesis at site of inflammation. The aim of the present study was to investigate the effects of epoxy resin (AH26) and zinc oxide-eugenol based (Endomethansone and N2) root canal sealers on the expression of COX-2 mRNA gene and protein in cultured human osteoblastic cells. Investigations of the time dependence of COX-2 mRNA expression in root canal sealer-treated human osteoblastic cells revealed a rapid accumulation of the transcript, a significant signal first detectable within 2h and diminished to control level after 24h. In addition, all root canal sealers also induced COX-2 protein expression in human osteoblastic cells. Furthermore, to elucidate whether induction of COX-2 is associated with cytotoxicity, NS-398 (a selective COX-2 inhibitor), was added to test its protective effects. NS-398 at non-cytotoxic dose is not able to prevent root canal sealers-induced cytotoxicity. Taken together, the activation of COX-2 expression may be one of the pathogenesis of root canal sealers-induced periapical inflammation. In addition, root canal sealers-induced cytotoxicity is not directly via the induction of COX-2 expression.
Collapse
Affiliation(s)
- Fu-Mei Huang
- Department of Prosthodontics, Oral Medicine Center, Chung Shan Medical University Hospital, Taichung, Taiwan
| | | | | |
Collapse
|