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Wang MC, Chang KW, Lin SC, Hsu LH, Hung PS. Dental pulp cells cocultured with macrophages aggravate the inflammatory conditions stimulated by LPS. BMC Oral Health 2023; 23:991. [PMID: 38071305 PMCID: PMC10710708 DOI: 10.1186/s12903-023-03625-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Accepted: 11/05/2023] [Indexed: 12/18/2023] Open
Abstract
BACKGROUND Pulp inflammation is complex interactions between different types of cells and cytokines. To mimic the interactions of different types of cells in inflamed dental pulp tissues, dental pulp cells (DPCs) were cocultured with different ratios of macrophages (THP-1) or LPS treatment. METHODS DPCs were cocultured with various ratios of THP-1, then photographed cell morphology and determined cell viability by MTT assay at preset times. Total RNA was also extracted to measure the inflammation marker-IL-6 and IL-8 expressions by RT-Q-PCR. The DPCs and THP-1 were treated with 0.01 - 1μg/ml lipopolysaccharide (LPS) and extract RNA at preset times, and detected IL-6 and IL-8 expression. DPCs were cocultured with various ratios of THP-1 with 0.1 μg/mL LPS, and detected IL-6 and IL-8 expression after 24 and 48 h. The data were analyzed by unpaired t-test or Mann-Whitney test. Differences were considered statistically significant when p < 0.05. RESULTS THP-1 and DPCs coculture models did not suppress the viability of DPCs and THP-1. Cocultured with various ratios of THP-1 could increase IL-6 and IL-8 expressions of DPCs (p = 0.0056 - p < 0.0001). The expressions of IL-6 and IL-8 were stronger in higher ratio groups (p = 0.0062 - p < 0.0001). LPS treatment also induced IL-6 and IL-8 expressions of DPCs and THP-1 (p = 0.0179 - p < 0.0001 and p = 0.0189 - p < 0.0001, separately). Under the presence of 0.1 μg/mL LPS, DPCs cocultured with THP-1 for 24 h also enhanced IL-6 and IL-8 expression (p = 0.0022). After cocultured with a higher ratio of THP-1 for 48 h, IL-6 and IL-8 expressions were even stronger in the presence of LPS (p = 0.0260). CONCLUSIONS Coculturing dental pulp cells and macrophages under LPS treatment aggravate the inflammatory process. The responses of our models were more severe than traditional inflamed dental models and better represented what happened in the real dental pulp. Utilizing our models to explore the repair and regeneration in endodontics will be future goals.
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Affiliation(s)
- Min-Ching Wang
- Division of Pediatric Dentistry, Department of Dentistry, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan
- Department of Dentistry, National Yang Ming Chiao Tung University, Taipei, Taiwan
- Department of Stomatology, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Kuo-Wei Chang
- Department of Dentistry, National Yang Ming Chiao Tung University, Taipei, Taiwan
- Institute of Oral Biology, School of Dentistry, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Shu-Chun Lin
- Department of Dentistry, National Yang Ming Chiao Tung University, Taipei, Taiwan
- Institute of Oral Biology, School of Dentistry, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Ling-Hsin Hsu
- Department of Dentistry, Taipei City Hospital, Taipei, Taiwan
| | - Pei-Shih Hung
- Institute of Oral Biology, School of Dentistry, National Yang Ming Chiao Tung University, Taipei, Taiwan.
- Department of Medical Research, National Yang Ming Chiao Tung University Hospital, Yilan, Taiwan.
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Wang MC, Chang KW, Lin SC, Hung PS. Biodentine but not MTA induce DSPP expression of dental pulp cells with different severity of LPS-induced inflammation. Clin Oral Investig 2023; 27:1207-1214. [PMID: 36208328 DOI: 10.1007/s00784-022-04734-0] [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: 06/03/2022] [Accepted: 10/01/2022] [Indexed: 11/03/2022]
Abstract
OBJECTIVES To explore the inflammatory and differentiation response in inflamed dental pulp cells (DPCs) induced by lipopolysaccharide (LPS) under different conditions with Biodentine and mineral trioxide aggregate (MTA) treatment. MATERIALS AND METHODS DPCs were treated with 0.001-1 µg/mL LPS for different periods to induce inflammation. Normal and inflamed DPCs were further treated with 0.14 mg/mL Biodentine or 0.13 mg/mL MTA for different periods. mRNA expression level of IL-6, IL-8 and ALP were analysed by qPCR. DSPP protein expression was detected by western blot. The data were analysed by the Mann-Whitney test, unpaired t test or two-way ANOVA. RESULTS After treatment for different times and with different concentrations of LPS, different severity of pulp inflammation was revealed by the expressions of IL-6 and IL-8. Higher concentrations of LPS induced higher IL-6 and IL-8 expressions, and these expressions first increased and then decreased (p < 0.0001). At 96 and 192 h, Biodentine significantly suppressed IL-6 expression in both normal and inflamed DPCs (p < 0.05). At 48 and 96 h, Biodentine suppressed ALP expression in both normal and inflamed DPCs (p < 0.05). At 48 and 96 h, Biodentine induced DSPP expressions in both normal and inflamed DPCs (p < 0.05). CONCLUSION Biodentine enhanced more DSPP differentiation of both normal and inflamed DPCs under different treatment durations than MTA. CLINICAL RELEVANCE The prognosis of vital pulp therapy may depend on the severity of pulp inflammation which is difficult to be determined in clinical settings. Therefore, Biodentine may enhance odontogenic differentiation in different severity of pulp inflammation imply its clinical indications.
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Affiliation(s)
- Min-Ching Wang
- Division of Dentistry, Taipei Municipal Hospital, WanFang Branch, Taipei, Taiwan.,Department of Dentistry, National Yang Ming Chiao Tung University, Taipei, Taiwan.,Department of Stomatology, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Kuo-Wei Chang
- Department of Dentistry, National Yang Ming Chiao Tung University, Taipei, Taiwan.,Institute of Oral Biology, School of Dentistry, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Shu-Chun Lin
- Department of Dentistry, National Yang Ming Chiao Tung University, Taipei, Taiwan.,Institute of Oral Biology, School of Dentistry, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Pei-Shih Hung
- Institute of Oral Biology, School of Dentistry, National Yang Ming Chiao Tung University, Taipei, Taiwan. .,Department of Medical Research, National Yang Ming Chiao Tung University Hospital, Siaoshe Road, No.169, Yilan, 26058, Taiwan.
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Xie Y, Wang Y, Ma Q, Li J, Chen Y, Yang R, Huang R, Zhang Q, Zou J. Survival analysis of pulpectomy in primary molars performed under dental general anaesthesia: a two-year retrospective study. BMC Oral Health 2022; 22:597. [PMID: 36496389 PMCID: PMC9741783 DOI: 10.1186/s12903-022-02553-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 11/02/2022] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND To retrospectively investigate the success rate of primary-molar pulpectomy performed under general anaesthesia and the potential risk factors that affect the 24-month success rate. METHODS The case data and two-year follow-up records of children (aged 3-6 years) who received pulpectomy in primary molars performed under general anaesthesia were reviewed and assessed. Potential risk factors included age, gender, decayed-missing-filled teeth, endodontic diagnosis, tooth location, and postobturation sealing of the pulp chamber floor with MTA. With a two-year follow-up period, the outcomes of all the primary molars were classified into success and failure. Survival analysis was used to assess the outcomes. The Kaplan-Meier method was used to analyse the success rate. Univariate and multivariate Cox proportional hazards regression models were used to evaluate the potential risk factors associated with the overall survival of primary molars. RESULTS A total of 410 teeth from 163 children (88 boys and 75 girls) were included in this study. The overall two-year success rate was 66.1% for all primary molars. The mean overall survival time for this study was 22.1 (95% CI, 21.73‒22.48) months. Multivariate Cox regression analysis demonstrated that endodontic diagnosis (irreversible pulpitis or periapical periodontitis), tooth location (maxillary or mandibular primary molar), and postobturation sealing of the pulp chamber floor (MTA or no-MTA) were significant risk factors for overall survival in this study (P < .05). The differences in success rates were not statistically significant in terms of age, gender, and decayed-missing-filled teeth (P > .05). CONCLUSIONS When compared to teeth diagnosed with irreversible pulpitis, those with periapical periodontitis failed more frequently. Postobturation sealing of the pulp chamber floor with MTA improved the success rate of pulpectomy in primary molars, especially when the inflammation did not spread to the periradicular area.
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Affiliation(s)
- Yongting Xie
- grid.13291.380000 0001 0807 1581State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Department of Paediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yan Wang
- grid.13291.380000 0001 0807 1581State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Department of Paediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Qizhao Ma
- grid.13291.380000 0001 0807 1581State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Department of Paediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Jing Li
- grid.13291.380000 0001 0807 1581State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Department of Paediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yandi Chen
- grid.13291.380000 0001 0807 1581State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Department of Paediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Ran Yang
- grid.13291.380000 0001 0807 1581State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Department of Paediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Ruijie Huang
- grid.13291.380000 0001 0807 1581State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Department of Paediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Qiong Zhang
- grid.13291.380000 0001 0807 1581State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Department of Paediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Jing Zou
- grid.13291.380000 0001 0807 1581State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Department of Paediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, China
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MicroRNA and their implications in dental pulp inflammation: current trends and future perspectives. Odontology 2022:10.1007/s10266-022-00762-0. [DOI: 10.1007/s10266-022-00762-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Accepted: 10/18/2022] [Indexed: 11/25/2022]
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Pedrosa MDS, Vilela HDS, Rahhal JG, Bueno NP, Lima FS, Nogueira FN, Sipert CR. Exposure to lipopolysaccharide and calcium silicate-based materials affects the behavior of dental pulp cells. Braz Dent J 2022; 33:9-17. [PMID: 36287503 PMCID: PMC9645168 DOI: 10.1590/0103-6440202204990] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2022] [Accepted: 06/23/2022] [Indexed: 12/31/2022] Open
Abstract
This study assessed the cell viability, cytokine production, and mineralization potential of human dental pulp cells (hDPCs) after exposure to lipopolysaccharide (LPS) and application of calcium silicate-based materials (CSBM). Characterization of the CSBM was performed by infrared spectroscopy (n = 3). Extracts of Bio-C Repair, Biodentine, Cimmo HD, and MTA Repair HP were prepared and diluted (1:1, 1:4, and 1:16). Culture of hDPCs was established and treated or not with 1 µg/mL of LPS from Escherichia coli for 7 days. MTT assay was used to assess cell viability at 24, 48, and 72 h (n = 6). Alkaline phosphatase (ALP) activity was assayed on day 7 (n = 4). Il-10 and TNF-α were quantified by ELISA at 24 h (n = 6). Data were analyzed by ANOVA and Tukey's test (α = 0.05). Cell viability of LPS-activated hPDCs was higher than untreated control in 48 and 72 h (p < 0.05). Differences between non-treated and LPS-activated hPDCs were observed for Biodentine and Cimmo HP (p < 0.05). The CSBM influenced the cell viability (p < 0.05). ALP activity was higher in LPS-activated hDPCs (p < 0.05). No changes in the concentration of TNF-α were observed between groups (p > 0.05). The CSBM increased the Il-10 production (p < 0.05). LPS-activated hDPCs presented increased cell viability and ALP activity. The CSBM showed mild toxicity and was able to enhance the cell viability and mineralization potential of untreated and LPS-activated hDPCs. The CSBM also induced anti-inflammatory mechanisms without compromising pro-inflammatory ones.
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Affiliation(s)
- Marlus da Silva Pedrosa
- University of São Paulo- USP, School of Dentistry, Department of Biomaterials and Oral Biology, São Paulo, SP, Brazil
| | - Handially dos Santos Vilela
- University of São Paulo- USP, School of Dentistry, Department of Biomaterials and Oral Biology, São Paulo, SP, Brazil
| | - Juliana Garuba Rahhal
- University of São Paulo- USP, School of Dentistry, Department of Restorative Dentistry, São Paulo, SP, Brazil
| | - Natália Pieretti Bueno
- University of São Paulo- USP, School of Dentistry, Department of Oral and Maxillofacial Surgery, Prosthesis and Traumatology, São Paulo, SP, Brazil
| | - Fabianne Soares Lima
- University of São Paulo- USP, School of Dentistry, Department of Biomaterials and Oral Biology, São Paulo, SP, Brazil
| | - Fernando Neves Nogueira
- University of São Paulo- USP, School of Dentistry, Department of Restorative Dentistry, São Paulo, SP, Brazil
| | - Carla Renata Sipert
- University of São Paulo- USP, School of Dentistry, Department of Restorative Dentistry, São Paulo, SP, Brazil
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Calcium Phosphate Cement Promotes Odontoblastic Differentiation of Dental Pulp Cells In Vitro and In Vivo. COATINGS 2022. [DOI: 10.3390/coatings12040543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
In the case of pulp injury, odontoblastic differentiation of dental pulp cells (DPCs) at the site of the exposed pulp is necessary for a successful direct pulp capping treatment. Calcium phosphate cement (CPC), a kind of hydroxyapatite-like bone cement, exhibits therapeutic potential in osteogenesis by regulating cell cycle progression and promoting osteoblastic differentiation. Based on the similar biological process of osteo/odontoblastic differentiation, the present study evaluated the effects of CPC on odontoblastic differentiation of DPCs in vitro and in vivo, respectively. The morphology of CPC was observed by scanning electron microscopy. Colony-forming units were used to assess the antibacterial activity. The effects of CPC on cell proliferation and odontoblastic differentiation of human dental pulp cells (hDPCs) were also measured. Histological staining was performed to observe the reparative dentin formation in rat molars. In vitro, results of antibacterial studies showed that CPC significantly inhibited the growth of Streptococcus mutans. The appropriate concentration of CPC extract showed low cytotoxicity on hDPCs. Furthermore, CPC extract also promoted odontoblastic differentiation and mineralization compared with the control group, as shown by a dynamic increase in the expression of odontogenic marker genes and the increased number of mineralized nodules at 21 days. The pulpotomy models with CPC facilitated the formation of dentin bridge with the highly expressed dentin matrix protein 1 (DMP1) in odontoblast-like cells. In conclusion, the favorable biocompatibility, antibacterial property and bio-inductivity of CPC suggest that CPC can be used as a promising direct pulp capping material.
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Role of Lipopolysaccharide, Derived from Various Bacterial Species, in Pulpitis—A Systematic Review. Biomolecules 2022; 12:biom12010138. [PMID: 35053286 PMCID: PMC8774278 DOI: 10.3390/biom12010138] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 01/09/2022] [Accepted: 01/11/2022] [Indexed: 02/06/2023] Open
Abstract
Lipopolysaccharide (LPS) is widely used for induction of inflammation in various human tissues, including dental pulp. The purpose of this study was to summarize current medical literature focusing on (1) cell types used by researchers to simulate dental pulp inflammation, (2) LPS variants utilized in experimental settings and how these choices affect the findings. Our study was conducted in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA). We searched for studies reporting outcomes of lipopolysaccharide application on dental pulp cells in vitro using electronic databases: MEDLINE, Web of Science and Scopus. Having gathered data from 115 papers, we aimed to present all known effects LPS has on different cell types present in dental pulp. We focused on specific receptors and particles that are involved in molecular pathways. Our review provides an essential foundation for further research using in vitro models of pulpitis.
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