1
|
Hayashi R, Yamazaki S, Mutoh N, Hashimoto T, Ohshima H, Tani-Ishii N. Influence of IgA nephropathy on the progression of pulpitis and apical periodontitis in HIGA mice. J Oral Biosci 2024; 66:98-104. [PMID: 37979655 DOI: 10.1016/j.job.2023.11.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 11/13/2023] [Accepted: 11/13/2023] [Indexed: 11/20/2023]
Abstract
OBJECTIVES Immunoglobulin (Ig)A nephropathy has been associated with oral infections such as periodontitis, but its pathogenesis is not fully understood; no treatments exist. This study analyzes the influence of IgA nephropathy, an autoimmune disease, on the pathogenesis of pulpitis and apical periodontitis. METHODS Two groups of mice were used in pulp infection experiments: high serum IgA nephropathy model mice (HIGA) and control mice (BALB/c). Histologic analyses of the pulp and apical periodontal tissues were performed on days 3, 5, 7, 14, and 28 following oral bacterial infection. The dynamics of odontoblasts, apoptotic cells, and IgA expression were analyzed using anti-Nestin, TUNEL, and anti-IgA staining, respectively. RESULTS Inflammatory cells infiltrated the exposed pulp at day three in both groups and by 14 days, these cells had infiltrated from the pulp to the apical periodontal tissue. The area of necrotic pulp tissue increased significantly in the control group at seven days. Odontoblasts decreased from day three onwards and disappeared by 28 days in both groups. The number of apoptotic cells in the pulp and apical periodontal tissues was significantly higher in the experimental group at day 28. The experimental group exhibited a significant increase in IgA production in the pulp after 14 days. Bone resorption in the apical periodontal tissue was significantly decreased in the experimental group at day 28. CONCLUSIONS The results of this study suggest that IgA nephropathy may modulate the inflammatory response and sustain long-term biological defense responses in pulpitis and apical periodontitis in HIGA mice.
Collapse
Affiliation(s)
- Reona Hayashi
- Department of Pulp Biology and Endodontics, Kanagawa Dental University, Japan
| | - Shiori Yamazaki
- Department of Pulp Biology and Endodontics, Kanagawa Dental University, Japan
| | - Noriko Mutoh
- Department of Pulp Biology and Endodontics, Kanagawa Dental University, Japan
| | - Tatsuo Hashimoto
- Department of Internal Medicine, Graduate School of Dentistry, Kanagawa Dental University, Japan
| | - Hayato Ohshima
- Division of Anatomy and Cell Biology of the Hard Tissue, Department of Tissue Regeneration and Reconstruction, Niigata University Graduate School of Medical and Dental Sciences, Japan
| | - Nobuyuki Tani-Ishii
- Department of Pulp Biology and Endodontics, Kanagawa Dental University, Japan.
| |
Collapse
|
2
|
Bai M, Chen H, Zhang Z, Liu X, Zhang D, Wang C. Substrate stiffness promotes dentinogenesis via LAMB1-FAK-MEK1/2 signaling axis. Oral Dis 2024; 30:562-574. [PMID: 36519511 DOI: 10.1111/odi.14469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Revised: 12/09/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022]
Abstract
OBJECTIVES In vivo, the principal function of mechanosensitive odontoblasts is to synthesize and secrete the matrix which then calcifies and forms reactive dentin after exposure to appropriate stimuli. This study aims to develop the influence of mechanical factors on dentinogenesis based on odontoblasts, which contribute to reparative dentin formation. METHODS We fabricated polydimethylsiloxane with different stiffnesses and seeded 17IIA11 odontoblast-like cells on the substrates in different stiffnesses. Cell morphology was detected by scanning electron microscope, and the mineralization phenotype was detected by alkaline phosphatase staining and alizarin red staining, while expression levels of dentinogenesis-related genes (including Runx2, Osx, and Alp) were assayed by qPCR. To explore mechanism, protein distribution and expression levels were detected by immunofluorescent staining, Western blotting, and immunoprecipitation. RESULTS In our results, during dentinogenesis, 17IIA11 odontoblast-like cells appeared better extension on stiffer substrates. The binding between LAMB1 and FAK contributed to converting mechanical stimuli into biochemical signaling, thereby controlling mitogen-activated protein kinase kinase 1/2 activity in stiffness-driven dentinogenesis. CONCLUSION The present study suggests odontoblast behaviors can be directly regulated by mechanical factors at cell-material interfaces, which offers fundamental mechanism in remodeling cell microenvironment, thereby contributing to physiological phenomena explanation and tissue engineering progress.
Collapse
Affiliation(s)
- Mingru Bai
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
- National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
- Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Huiyu Chen
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Zhaowei Zhang
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Xiaoyu Liu
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Demao Zhang
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
- National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
- West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, China
| | - Chengling Wang
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
- National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
- Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| |
Collapse
|
3
|
Noohi P, Abdekhodaie MJ, Nekoofar MH, Galler KM, Dummer PMH. Advances in Scaffolds Used for Pulp-Dentine Complex Tissue Engineering - A Narrative Review. Int Endod J 2022; 55:1277-1316. [PMID: 36039729 DOI: 10.1111/iej.13826] [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: 01/27/2022] [Revised: 07/28/2022] [Accepted: 08/10/2022] [Indexed: 11/27/2022]
Abstract
Pulp necrosis in immature teeth disrupts root development and predisposes roots to fracture as a consequence of their thin walls and open apices. Regenerative endodontics is a developing treatment modality whereby necrotic pulps are replaced with newly formed healthy tissue inside the root canal. Many clinical studies have demonstrated the potential of this strategy to stimulate root maturation and apical root-end closure. However, clinical outcomes are patient-dependent and unpredictable. The development of predictable clinical protocols is achieved through the interplay of the three classical elements of tissue engineering, namely, stem cells, signaling molecules, and scaffolds. Scaffolds provide structural support for cells to adhere and proliferate and also regulate cell differentiation and metabolism. Hence, designing and fabricating an appropriate scaffold is a crucial step in tissue engineering. In this review, four main classes of scaffolds used to engineer pulp-dentine complexes, including bioceramic-based scaffolds, synthetic polymer-based scaffolds, natural polymer-based scaffolds, and composite scaffolds, are covered. Additionally, recent advances in the design, fabrication, and application of such scaffolds are analysed along with their advantages and limitations. Finally, the importance of vascular network establishment in the success of pulp-dentine complex regeneration and strategies used to create scaffolds to address this challenge are discussed.
Collapse
Affiliation(s)
- Parisa Noohi
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran
| | - Mohammad J Abdekhodaie
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran
| | - Mohammad H Nekoofar
- Department of Endodontics, School of Dentistry, Tehran University of Medical Sciences Tehran University of Medical Sciences, Tehran, Iran.,Department of Tissue Engineering, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran.,Department of Endodontic, Bahçeşehir University School of Dentistry, Istanbul, Turkey
| | - Kerstin M Galler
- Department of Conservative Dentistry and Periodontology, University Hospital Erlangen-Nürnberg, Erlangen, Germany
| | - Paul M H Dummer
- School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Cardiff, UK
| |
Collapse
|
4
|
Inflammation of the Human Dental Pulp Induces Phosphorylation of eNOS at Thr495 in Blood Vessels. Biomedicines 2022; 10:biomedicines10071586. [PMID: 35884891 PMCID: PMC9313222 DOI: 10.3390/biomedicines10071586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 06/27/2022] [Accepted: 06/30/2022] [Indexed: 11/17/2022] Open
Abstract
The activity of endothelial nitric oxide synthase (eNOS) in endothelial cells increased with the phosphorylation of the enzyme at Ser1177 and decreased at Thr495. The regulation of the phosphorylation sites of eNOS at Ser1177 and Thr495 in blood vessels of the healthy and inflamed human dental pulp is unknown. To investigate this, healthy and carious human third molars were immersion-fixed and decalcified. The localization of eNOS, Ser1177, and Thr495 in healthy and inflamed blood vessels was examined in consecutive cryo-sections using quantitative immunohistochemical methods. We found that the staining intensity of Ser1177 in healthy blood vessels decreased in inflamed blood vessels, whereas the weak staining intensity of Thr495 in healthy blood vessels strongly increased in inflamed blood vessels. In blood vessels of the healthy pulp, eNOS is active with phosphorylation of the enzyme at Ser1177. The phosphorylation of eNOS at Thr495 in inflamed blood vessels leads to a decrease in eNOS activity, contributing to eNOS uncoupling and giving evidence for a decrease in NO and an increase in O2− production. Since the formation of the tertiary dentin matrix depends on intact pulp circulation, eNOS uncoupling and phosphorylation of eNOS at Thr495 in the inflamed pulp blood vessels should be considered during caries therapy.
Collapse
|
5
|
Rusu MC, Vrapciu AD, Nicolescu MI, Stoenescu MD, Jianu AM, Lighezan R, Oancea R, Mănoiu VS, Hostiuc S. Extruded Nucleoli of Human Dental Pulp Cells. Medicina (B Aires) 2022; 58:medicina58020260. [PMID: 35208583 PMCID: PMC8876639 DOI: 10.3390/medicina58020260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 02/04/2022] [Accepted: 02/06/2022] [Indexed: 11/22/2022] Open
Abstract
Background and Objectives: The dental pulp stem cells are highly proliferative and can differentiate into various cell types, including endothelial cells. We aimed to evaluate the ultrastructural characteristics of the human dental pulp cells of the permanent frontal teeth. Materials and Methods: Human adult bioptic dental pulp was collected from n = 10 healthy frontal teeth of five adult patients, prior to prosthetic treatments for aesthetic purposes. Tissues were examined under transmission electron microscopy. Results: We identified cells with a peculiar trait: giant nucleoli resembling intranuclear endoplasmic reticulum, which mimicked extrusion towards the cytoplasm. These were either partly embedded within the nuclei, the case in which their adnuclear side was coated by marginal heterochromatin and the abnuclear side was coated by a thin rim of ribosomes, or were apparently isolated from the nuclei, while still being covered by ribosomes. Conclusions: Similar electron microscopy features were previously reported in the human endometrium, as nucleolar channel system; or R-Rings induced by Nopp140. To our knowledge, this is the first report of extruded nucleolar structure in the dental pulp. Moreover, the aspect of giant extruded nucleoli was not previously reported in any human cell type, although similar evidence was gathered in other species as well as in plants.
Collapse
Affiliation(s)
- Mugurel Constantin Rusu
- Division of Anatomy, Faculty of Dental Medicine, “Carol Davila” University of Medicine and Pharmacy, 050474 Bucharest, Romania; (M.C.R.); (A.D.V.)
| | - Alexandra Diana Vrapciu
- Division of Anatomy, Faculty of Dental Medicine, “Carol Davila” University of Medicine and Pharmacy, 050474 Bucharest, Romania; (M.C.R.); (A.D.V.)
| | - Mihnea Ioan Nicolescu
- Division of Histology, Faculty of Dental Medicine, “Carol Davila” University of Medicine and Pharmacy, 050474 Bucharest, Romania
- Laboratory of Radiobiology, “Victor Babeș” National Institute of Pathology, 050096 Bucharest, Romania
- Correspondence: (M.I.N.); (A.M.J.)
| | - Mihai Dragomir Stoenescu
- Research Department, “Dr. Carol Davila” Central Military Emergency Hospital, 010825 Bucharest, Romania;
| | - Adelina Maria Jianu
- Department of Anatomy, Faculty of Medicine, “Victor Babeş” University of Medicine and Pharmacy, 300041 Timişoara, Romania
- Correspondence: (M.I.N.); (A.M.J.)
| | - Rodica Lighezan
- Department of Histology, Faculty of Medicine, “Victor Babeş” University of Medicine and Pharmacy, 300041 Timişoara, Romania;
| | - Roxana Oancea
- Department of Preventive and Community Dentistry, Faculty of Dental Medicine, “Victor Babeş” University of Medicine and Pharmacy, 300041 Timişoara, Romania;
| | - Vasile Sorin Mănoiu
- Department of Cellular and Molecular Biology, National Institute of Research and Development for Biological Sciences, 060031 Bucharest, Romania;
| | - Sorin Hostiuc
- Division of Legal Medicine, Faculty of Dental Medicine, “Carol Davila” University of Medicine and Pharmacy, 020021 Bucharest, Romania;
| |
Collapse
|
6
|
Biological characteristics of dental pulp stem cells and their potential use in regenerative medicine. J Oral Biosci 2022; 64:26-36. [PMID: 35031479 DOI: 10.1016/j.job.2022.01.002] [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: 11/30/2021] [Revised: 12/30/2021] [Accepted: 01/06/2022] [Indexed: 11/20/2022]
Abstract
BACKGROUND Regenerative medicine has emerged as a multidisciplinary field with the promising potential of renewing tissues and organs. The main types of adult stem cells used in clinical trials are hematopoietic and mesenchymal stem cells (MSCs). Stem cells are defined as self-renewing clonogenic progenitor cells that can generate one or more types of specialized cells. HIGHLIGHT MSCs form adipose, cartilage, and bone tissue. Their protective and regenerative effects, such as mitogenic, anti-apoptotic, anti-inflammatory, and angiogenic effects, are mediated through paracrine and endocrine mechanisms. Dental pulp is a valuable source of stem cells because the collection of dental pulp for stem cell isolation is non-invasive, in contrast to conventional sources, such as bone marrow and adipose tissue. Teeth are an excellent source of dental pulp stem cells (DPSCs) for therapeutic procedures and they can be easily obtained after tooth extraction or the shedding of deciduous teeth. Thus, there is increased interest in optimizing and establishing standard procedures for obtaining DPSCs; preserving well-defined DPSC cultures for specific applications; and increasing the efficiency, reproducibility, and safety of the clinical use of DPSCs. CONCLUSION This review comprehensively describes the biological characteristics and origins of DPSCs, their identification and harvesting, key aspects related to their characterization, their multilineage differentiation potential, current clinical applications, and their potential use in regenerative medicine for future dental and medical applications.
Collapse
|
7
|
Baker A, Karpagaselvi K, Kumaraswamy J, Ranjini MR, Gowher J. Role of dental pulp in age estimation: A quantitative and morphometric study. J Forensic Dent Sci 2020; 11:95-102. [PMID: 32082045 PMCID: PMC7006301 DOI: 10.4103/jfo.jfds_57_19] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2019] [Revised: 11/21/2019] [Accepted: 12/20/2019] [Indexed: 12/01/2022] Open
Abstract
Context: This study was designed to characterize the role of the dental pulp (DP) in age estimation. Aim: The analysis of age-related quantifiable changes in DP components such as odontoblasts, collagen fibers, and blood vessels. Subjects and Methods: One hundred and twenty extracted teeth from six age groups (20–30 years, 31–40 years, 41–50 years, 51–60 years, 61–70 years, and 71–80 years) were subjected to decalcification and routine histopathological processing followed by Hematoxylin and Eosin and Picrosirius Red staining. Evaluation of the number of odontoblasts, mean vessel area (MVA), mean vessel diameter (MVD), and collagen fiber thickness were done. Statistical Analysis Used: ANOVA test, Fisher's test, and Regression Analysis. Results: Reduction in the number of odontoblasts/mm of pulp-dentinal border, MVA, and MVD were seen with advancing age. Rise in collagen fiber thickness was noted with increasing age. All parameters showed strongly statistically significant differences between age groups with P < 0.001 (ANOVA test). Conclusions: Regression formulae derived for age estimation based on data collected demonstrated linear correlation with age. Collagen fiber thickness had the highest accuracy followed by odontoblast numbers and MVA. MVD was the least accurate among the factors considered. However, the highest accuracy of 90.9% was seen when all parameters were incorporated together in a single equation.
Collapse
Affiliation(s)
- Anjum Baker
- Department of Oral Pathology, Al-Azhar Dental College, Thodupuzha, Kerala, India
| | - K Karpagaselvi
- Department of Oral Pathology, Vydehi Institute of Dental Sciences and Research Centre, Bengaluru, Karnataka, India
| | - Jayalakshmi Kumaraswamy
- Department of Oral Pathology, Vydehi Institute of Dental Sciences and Research Centre, Bengaluru, Karnataka, India
| | - M R Ranjini
- Apollo Dental Clinic, Mysore, Karnataka, India
| | | |
Collapse
|
8
|
KHADIZA N, HASEGAWA T, NAGAI T, YAMAMOTO T, MIYAMOTO- TAKASAKI Y, HONGO H, ABE M, HARAGUCHI M, YAMAMOTO T, YIMIN, QIU Z, SASAKI M, KUROSHIMA S, OHSHIMA H, FREITAS PHLD, LI M, YAWAKA Y, AMIZUKA N. Immunolocalization of podoplanin/E11/gp38, CD44, and endomucin in the odontoblastic cell layer of murine tooth germs. Biomed Res 2019; 40:133-143. [DOI: 10.2220/biomedres.40.133] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Naznin KHADIZA
- Developmental Biology of Hard Tissue
- Dentistry for Children and Disabled Person
| | | | - Tomoya NAGAI
- Developmental Biology of Hard Tissue
- Oral Functional Prosthodontics, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University
| | | | | | | | - Miki ABE
- Developmental Biology of Hard Tissue
- Oral Functional Prosthodontics, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University
| | | | | | - YIMIN
- Central Research Institute, Graduate School of Medicine and Graduate School of Dental Medicine, Hokkaido University
| | | | - Muneteru SASAKI
- Department of Applied Prosthodontics, Unit of Translational Medicine, Graduate School of Biomedical Sciences, Nagasaki University
| | - Shinichiro KUROSHIMA
- Department of Applied Prosthodontics, Unit of Translational Medicine, Graduate School of Biomedical Sciences, Nagasaki University
| | - Hayato OHSHIMA
- Division of Anatomy and Cell Biology of Hard Tissue, Graduate School of Medical and Dental Sciences, Niigata University
| | | | - Minqi LI
- Division of Basic Science of Stomatology, The School of Stomatology, Shandong University
| | | | | |
Collapse
|
9
|
Zhao L, Matsumoto Y, Ono T, Iseki S. Effects of mechanical force application on the developing root apex in rat maxillary molars. Arch Oral Biol 2019; 101:64-76. [PMID: 30903951 DOI: 10.1016/j.archoralbio.2019.03.010] [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: 11/30/2018] [Revised: 02/06/2019] [Accepted: 03/13/2019] [Indexed: 11/30/2022]
Abstract
OBJECTIVES We aimed to investigate the effects of mechanical force application on the developing root apex in vivo. DESIGN Mechanical force was applied on the maxillary first molars of Sprague-Dawley rats at postnatal day 21 for 1, 3, 5, and 7 days to induce tooth movement. We observed the developing root apex of the mesial root of first molar by using micro-focus X-ray computed tomography, histological staining, immunohistochemistry and in situ hybridization to analyze apical cell proliferation and gene expression. Moreover, the force was released after 3 and 7 days of tooth movement, and root apical morphology at postnatal day 35 was subsequently observed. RESULTS After 1 and 3 days of tooth movement, root apical morphology was altered by increasing immune-reactivity of laminin in the forming periodontal ligament. After 7 days of tooth movement, the root length decreased significantly with bending root apex, decreased cell proliferation and altered gene expression in developing root apex. At postnatal day 35, apical morphology showed no obvious abnormality when the force was released after 3 days of tooth movement, whereas root apical bending was not rescued when the force was released after 7 days. CONCLUSIONS Relatively short-term force application had no obvious adverse effects on the developing root apex. However, relatively long-term force application altered root apex by affecting Hertwig's epithelial root sheath morphology and apical cellular behavior.
Collapse
Affiliation(s)
- Lu Zhao
- Department of Orthodontic Science, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan; Department of Molecular Craniofacial Embryology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.
| | - Yoshiro Matsumoto
- Department of Orthodontic Science, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.
| | - Takashi Ono
- Department of Orthodontic Science, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.
| | - Sachiko Iseki
- Department of Molecular Craniofacial Embryology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.
| |
Collapse
|
10
|
Abstract
Creating an optimal microenvironment that supports angiogenesis, cell-cell cross talk, cell migration, and differentiation is crucial for pulp/dentin regeneration. It was shown that dental stem cells being seeded onto a scaffold and transplanted in vivo could give rise to a new tissue similar to that of the native pulp. However, the unique structure of the tooth with a pulp space encased within hard dentin allows only a single blood supply from a small apical opening located at the apex of the root canals. Therefore, a further strategy that can address this limitation such as the incorporation of endothelial/endothelial progenitor cells or cells with high angiogenic potential into the transplant is required so that the added cells can contribute to the vascularization within the implant. However, the placement of 2 or more different cell types inside 3-dimensional porous scaffolds is technologically challenging. In contrast to the conventional scaffolding approach, self-assembly of monodispersed cells into 3-dimensional tissue mimics permits true physiological interactions between and among different types of cells without any influence from a secondary material. In this review, we discuss potential strategies that can be used in vasculature engineering in dental pulp regeneration with a specific emphasis on combining prevascularization and scaffold-based or scaffold-free approaches.
Collapse
Affiliation(s)
| | - Chengfei Zhang
- Endodontology, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China.
| |
Collapse
|
11
|
Yumoto H, Hirao K, Hosokawa Y, Kuramoto H, Takegawa D, Nakanishi T, Matsuo T. The roles of odontoblasts in dental pulp innate immunity. JAPANESE DENTAL SCIENCE REVIEW 2018; 54:105-117. [PMID: 30128058 PMCID: PMC6094490 DOI: 10.1016/j.jdsr.2018.03.001] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Revised: 02/06/2018] [Accepted: 03/01/2018] [Indexed: 11/26/2022] Open
Abstract
Odontoblasts located in the outermost layer of dental pulp form a natural barrier between mineralized tissues, dentin, and soft tissues, dental pulp, of the vital tooth, and they first recognize caries-related pathogens and sense external irritations. Therefore, odontoblasts possess a specialized innate immune system to fight oral pathogens invading into dentin. Generally, the rapid initial sensing of microbial pathogens, especially pathogen-associated molecular patterns (PAMPs) shared by microorganisms, are mediated by pattern recognition receptors (PRRs), such as Toll-like receptor and the nucleotide-binding oligomerization domain (NOD). The innate immune responses in odontoblasts initiated by sensing oral pathogens provide host protective events, such as inflammatory reactions, to produce a variety of pro-inflammatory mediators, including chemokines and cytokines. These attract various inflammatory cells and cause antibacterial reactions, such as the production of defensins, to kill microorganisms in the proximal region of the odontoblast layer. This review focuses on innate immunity, especially cellular and molecular mechanisms regarding the sensing of PAMPs from oral pathogens by PRRs, in odontoblasts and provides information for future studies for the development of novel therapeutic strategies, including diagnosis and treatment, to prevent exceeding dental pulp inflammation and preserve the dental pulp tissues.
Collapse
Affiliation(s)
- Hiromichi Yumoto
- Department of Periodontology and Endodontology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8504, Japan
| | - Kouji Hirao
- Department of Conservative Dentistry, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8504, Japan
| | - Yuki Hosokawa
- Department of Conservative Dentistry, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8504, Japan
| | - Hitomi Kuramoto
- Department of Conservative Dentistry, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8504, Japan
| | - Daisuke Takegawa
- Department of Conservative Dentistry, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8504, Japan
| | - Tadashi Nakanishi
- Department of Conservative Dentistry, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8504, Japan
| | - Takashi Matsuo
- Department of Conservative Dentistry, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8504, Japan
| |
Collapse
|
12
|
Mahdee A, Eastham J, Whitworth JM, Gillespie JI. Evidence for programmed odontoblast process retraction after dentine exposure in the rat incisor. Arch Oral Biol 2017; 85:130-141. [PMID: 29073561 DOI: 10.1016/j.archoralbio.2017.10.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Revised: 09/26/2017] [Accepted: 10/02/2017] [Indexed: 11/25/2022]
Abstract
OBJECTIVE To re-examine the morphology and potential functions of odontoblasts in intact rat incisors and after cavity preparation into dentine. DESIGN Intact incisors were fixed, decalcified, snap frozen and sectioned (10μm), before staining with rhodamine phalloidin or antibodies for cyto-skeletal proteins: vimentin and actin, ion transporter: NaK-ATPase, and dendritic cell marker: OX6. Samples with cavity were processed similarly and stained for actin and vimentin before comparing the lengths of odontoblast processes (OP) at baseline, 3h and 24h (n=5 for each group). RESULTS Actin was expressed through the full length of OP, while vimentin immunoreactivity was not uniform, with 4 distinct regions. OP showed morphological complexity with fine branches emanating within different regions of dentine. Novel actin-positive tree-like OP were identified within predentine which reduced in intensity and length toward the incisal portion of the tooth. Specimens with cavities showed time-dependant pulpal retraction of OP. CONCLUSIONS Differences in structural antibody expression suggest functional variations in OP within different regions of dentine. The role of actin positive OP in predentine is not known, but could be related to dentine deposition, cellular stability or sensing mechanisms. Cavity preparation into dentine was followed by programmed retraction of OP which could be controlled either mechanically by the spatial limitation of the OP within dentinal tubules or structurally by the presence of vimentin, in addition to actin, in the mid-dentine.
Collapse
Affiliation(s)
- A Mahdee
- Centre for Oral Health Research, UK; Institute of Cellular Medicine, UK; School of Dental Sciences Newcastle University, UK; University of Baghdad College of Dentistry, Iraq.
| | - J Eastham
- School of Dental Sciences Newcastle University, UK.
| | - J M Whitworth
- Centre for Oral Health Research, UK; School of Dental Sciences Newcastle University, UK.
| | - J I Gillespie
- Urology and Urological Rehabilitation Antwerp University, Belgium.
| |
Collapse
|
13
|
Solé-Magdalena A, Martínez-Alonso M, Coronado CA, Junquera LM, Cobo J, Vega JA. Molecular basis of dental sensitivity: The odontoblasts are multisensory cells and express multifunctional ion channels. Ann Anat 2017; 215:20-29. [PMID: 28954208 DOI: 10.1016/j.aanat.2017.09.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Revised: 08/22/2017] [Accepted: 09/10/2017] [Indexed: 12/26/2022]
Abstract
Odontoblasts are the dental pulp cells responsible for the formation of dentin. In addition, accumulating data strongly suggest that they can also function as sensory cells that mediate the early steps of mechanical, thermic, and chemical dental sensitivity. This assumption is based on the expression of different families of ion channels involved in various modalities of sensitivity and the release of putative neurotransmitters in response to odontoblast stimulation which are able to act on pulp sensory nerve fibers. This review updates the current knowledge on the expression of transient-potential receptor ion channels and acid-sensing ion channels in odontoblasts, nerve fibers innervating them and trigeminal sensory neurons, as well as in pulp cells. Moreover, the innervation of the odontoblasts and the interrelationship been odontoblasts and nerve fibers mediated by neurotransmitters was also revisited. These data might provide the basis for novel therapeutic approaches for the treatment of dentin sensibility and/or dental pain.
Collapse
Affiliation(s)
- A Solé-Magdalena
- Departamento de Morfología y Biología Celular Universidad de Oviedo, Spain
| | - M Martínez-Alonso
- Departamento de Morfología y Biología Celular Universidad de Oviedo, Spain
| | - C A Coronado
- Facultad de Ciencias de la Salud, Universidad Autónoma de Chile, Temuco, Chile
| | - L M Junquera
- Departamento de Especialidades Médico-Quirúrgicas, Universidad de Oviedo, Spain; Servicio de Cirugía Maxilofacial, Hospital Universitario Central de Asturias, Oviedo, Spain
| | - J Cobo
- Departamento de Especialidades Médico-Quirúrgicas, Universidad de Oviedo, Spain; Instituto Asturiano de Odontología, Oviedo, Spain
| | - J A Vega
- Departamento de Morfología y Biología Celular Universidad de Oviedo, Spain; Facultad de Ciencias de la Salud, Universidad Autónoma de Chile, Temuco, Chile.
| |
Collapse
|
14
|
Seino Y, Takano Y, Ohshima H. Positional and ultrastructural changes in peripheral pulp capillaries correlate with the active phase of dentin deposition and mineralization in rat molars. J Oral Biosci 2017. [DOI: 10.1016/j.job.2017.05.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
15
|
Kato A, Suzuki M, Karasawa Y, Sugimoto T, Doi K. Histopathological Study of Time Course Changes in PTHrP-Induced Incisor Lesions of Rats. Toxicol Pathol 2016; 33:230-8. [PMID: 15902966 DOI: 10.1080/01926230590906530] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Parathyroid hormone related peptide (PTHrP) was discovered as a causative factor of humoral hypercalcemia of malignancy (HHM). In the present study using HHM model rats, the time course of odontoblastic response to PTHrP and its relation to incisal fracture were elicited. Nude rats were implanted with PTHrP-expressing tumor (LC-6) cells, mandibular incisors were collected at several time points. Microscopically 3 distinctive types of odontoblastic/dentin lesions were observed. Hypercalcfied dentin, which was reported as hypercalcemia-induced lesion in previous reports, observed in all areas of the dentin from week 5–10 samplings. Dentin niche, observed solely in week-10 sampling point, exhibited a nature identical to that of reparative odontoblast reported in the literatures of various cytotoxic agents. Since cytotoxicites were neither observed prior to the lesions nor reported as a role of PTHrP, the reparative response may have derived from highly sustained levels of PTHrP. Loss of columnar odontoblasts height was initially observed at week-5 time point in the middle section of the incisor. This primary loss of cell height prior to incisor fracture was considered to be the earliest response to the increased PTHrP levels of this model.
Collapse
Affiliation(s)
- Atsuhiko Kato
- Toxicology Laboratory, Chugai Pharmaceutical Co., Ltd., Gotemba-shi, Shizuoka 412-8513, Japan.
| | | | | | | | | |
Collapse
|
16
|
Saito K, Ida-Yonemochi H, Ushiki T, Ohshima H. Responses of pulp vasculature after cavity preparation in rat molars. J Oral Biosci 2015. [DOI: 10.1016/j.job.2015.05.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
17
|
Bleicher F. Odontoblast physiology. Exp Cell Res 2014; 325:65-71. [DOI: 10.1016/j.yexcr.2013.12.012] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2013] [Revised: 12/03/2013] [Accepted: 12/08/2013] [Indexed: 11/25/2022]
|
18
|
Nakajima K, Shibata Y, Hishikawa Y, Suematsu T, Mori M, Fukuhara S, Koji T, Sawase T, Ikeda T. Coexpression of ang1 and tie2 in odontoblasts of mouse developing and mature teeth-a new insight into dentinogenesis. Acta Histochem Cytochem 2014; 47:19-25. [PMID: 24761046 PMCID: PMC3972426 DOI: 10.1267/ahc.13043] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2013] [Accepted: 01/27/2014] [Indexed: 11/30/2022] Open
Abstract
Angiopoietin-1 regulates vascular angiogenesis and stabilization, and is reported to promote bone formation by facilitating angiogenesis. To estimate the role of Ang1 in odontogenesis, we explored the distribution of Ang1 and the receptor, Tie2 in the mouse developing and mature first molar of the mandible. At embryonic day 18, when differentiation of odontoblasts begins, immunosignals for Ang1 were intensely detected in the basement membrane and the distal side, which faced the basement membrane of odontoblasts. In situ hybridization revealed that Ang1 was expressed in odontoblasts and ameloblasts facing the basement membrane. Tie2 was localized in the distal side of odontoblasts. After birth, Ang1 was detected in the predentin, whereas both Ang1 and Tie2 were colocalized in odontoblasts and odontoblast processes. These distributions were retained up to 8 weeks. In contrast to odontoblasts, ameloblasts, cementoblasts and osteoblasts expressed Ang1 but did not express Tie2. Colocalization of Ang1 and Tie2 in odontoblasts and selective expression of Tie2 in odontoblasts among cells responsible for calcified tissue formation suggested the involvement of autocrine signals of Ang1-Tie2 in dentinogenesis.
Collapse
Affiliation(s)
- Kazunori Nakajima
- Department of Applied Prosthodontics, Nagasaki University Graduate School of Biomedical Sciences
| | - Yasuaki Shibata
- Department of Oral Pathology and Bone Metabolism, Nagasaki University Graduate School of Biomedical Sciences
| | - Yoshitaka Hishikawa
- Department of Histology and Cell Biology, Nagasaki University Graduate School of Biomedical Sciences
- Present address: Division of Histochemistry and Cell Biology, Department of Anatomy, Faculty of Medicine, University of Miyazaki
| | - Takashi Suematsu
- Central Electron Microscope Laboratory, Nagasaki University Graduate School of Biomedical Sciences
| | - Masako Mori
- Department of Cell Biology, Nagasaki University Graduate School of Biomedical Sciences
| | - Shigetomo Fukuhara
- Department of Cell Biology, National Cerebral and Cardiovascular Center Research Institute
| | - Takehiko Koji
- Department of Histology and Cell Biology, Nagasaki University Graduate School of Biomedical Sciences
| | - Takashi Sawase
- Department of Applied Prosthodontics, Nagasaki University Graduate School of Biomedical Sciences
| | - Tohru Ikeda
- Department of Oral Pathology and Bone Metabolism, Nagasaki University Graduate School of Biomedical Sciences
| |
Collapse
|
19
|
Zeren C, Keten A, Çelik S, Damlar I, Daglıoglu N, Çeliker A, Karaarslan B. Demonstration of ethyl glucuronide in dental tissue samples by liquid chromatography/electro-spray tandem mass spectrometry. J Forensic Leg Med 2013; 20:706-10. [PMID: 23910866 DOI: 10.1016/j.jflm.2013.03.033] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Revised: 03/04/2013] [Accepted: 03/19/2013] [Indexed: 10/26/2022]
Abstract
INTRODUCTION Ethyl glucuronide (EtG) has been studied in various tissues and body fluid for determination of alcohol intake. However, no study, dealing with EtG analysis in dental tissue, was performed so far. In this study, we aimed to demonstrate EtG levels in dental tissue. MATERIALS AND METHODS Michigan Alcohol Screening Test (MAST) was performed to 29 participants. Following the test, cases were divided into three groups as non-hazardous alcohol users, alcohol abusers and 6 controls who verbally declared that they were abstainers. A total of 29 tooth specimens, obtained from participants, was included in the study. These specimens were analyzed using LC/MS/MS. RESULTS All of the participants included in the study were male. According to the MAST outcomes 14 of the participants were non-hazardous alcohol users, and 9 were alcohol abusers, while 6 patients verbally declared that they were abstainers. Dental tissue analyses revealed EtG levels ranging between EtG<LOD and 23.39 pg/mg. EtG levels were observed to be <LOD in dental specimens of 6 abstainer cases. A significant correlation was found between EtG levels measured in the dental tissues and MAST outcomes on the statistical analyses (r=0.914). CONCLUSION The findings of the present study demonstrated that dental tissue can be used for detection of alcohol intake, using LC/MS/MS.
Collapse
Affiliation(s)
- Cem Zeren
- Mustafa Kemal University, Medical Faculty, Department of Forensic Medicine, Hatay, Turkey
| | | | | | | | | | | | | |
Collapse
|
20
|
Yoshioka S, Takahashi Y, Abe M, Michikami I, Imazato S, Wakisaka S, Hayashi M, Ebisu S. Activation of the Wnt/β-catenin pathway and tissue inhibitor of metalloprotease 1 during tertiary dentinogenesis. J Biochem 2012; 153:43-50. [PMID: 23038674 DOI: 10.1093/jb/mvs117] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Tertiary dentin is deposited inside teeth after various stimuli and serves as a major defensive wall to preserve pulp cells. However, the molecular mechanisms of the activation of quiescent odontoblasts, immature pulp cells and tertiary dentin formation are still unclear. Therefore, we performed a comprehensive gene expression analysis of pulp cells after cavity preparation of 9-week-old rat molars to clarify the critical molecules in tertiary dentinogenesis. As a result, mRNA expression of various molecules was up- or down-regulated. Notably, several members of the matrix metalloprotease family and their endogenous inhibitors were up-regulated after cavity preparation. In situ hybridization showed that tissue inhibitor of metalloprotease 1 (Timp1) was widely and continuously distributed in the pulp beneath the cavity in vivo. We also observed accumulation of β-catenin in the pulp cells beneath the cavity by fluorescence immunohistochemistry. Furthermore, Timp1 transcription was repressed by a dominant-negative TCF4 in immature undifferentiated mesenchymal cells, but not altered in mature odontoblast-like cells. These results indicate that cavity preparation may activate the Wnt/β-catenin pathway and the Wnt/β-catenin pathway and Timp1 may be correlatively involved in pulp repair. Timp1 might play crucial roles in reactivation of immature pulp cells for tertiary dentinogenesis.
Collapse
Affiliation(s)
- Seisuke Yoshioka
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan
| | | | | | | | | | | | | | | |
Collapse
|
21
|
Directed glia-assisted angiogenesis in a mature neurosensory structure: Pericytes mediate an adaptive response in human dental pulp that maintains blood-barrier function. J Comp Neurol 2012; 520:3803-26. [DOI: 10.1002/cne.23162] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|
22
|
Takahashi S, Ambe K, Kon H, Takada S, Ohno T, Watanabe H. Immunohistochemical investigation of lymphatic vessel formation control in mouse tooth development: lymphatic vessel-forming factors and receptors in tooth development in mice. Tissue Cell 2012; 44:170-81. [PMID: 22465518 DOI: 10.1016/j.tice.2012.03.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2011] [Revised: 03/01/2012] [Accepted: 03/02/2012] [Indexed: 11/19/2022]
Abstract
The presence of lymphatic vessels in dental pulp has recently been controversial, and no conclusion has been reached. In this study, we investigated the control of lymphangiogenesis with dental pulp development in the mouse mandibular molar using VEGF-C, VEGF-D, and VEGFR-3 as indices of lymphatic vessel-controlling factors. In addition, to distinguish blood and lymphatic vascular epithelial cells, we performed immunohistochemical analysis using von Willebrand factor (vWF) and statistical analysis. In dental papilla in the bell-stage non-calcified period, mesenchymal cells positive for VEGF-C, VEGF-D, and VEGFR-3 increased and lumen-forming endothelial cells were noted, but vWF was negative, suggesting that these were actively forming lymphatic vessels. Positive undifferentiated mesenchymal cells, an increase in endothelial cells in dental pulp, and lumen expansion were noted early after birth. Positivity was also detected in the odontoblast layer and sheath of Hertwig after birth, suggesting that these factors also play important roles in odontoblast differentiation and maturation and periodontal ligament and tooth root formation. We embryologically clarified lymphatic vessel formation in dental pulp and a process of lymphatic vessel formation from blood vessels, suggesting involvement of the surrounding tissue, odontoblasts, and sheath of Hertwig in vessel formation.
Collapse
Affiliation(s)
- S Takahashi
- Department of Oral and Maxillofacial Surgery, Ohu University, Graduate School of Dentistry, Mitsumidou 31-1, Tomitamachi, Koriyama, Fukushima 963-8611, Japan
| | | | | | | | | | | |
Collapse
|
23
|
Quispe-Salcedo A, Ida-Yonemochi H, Nakatomi M, Ohshima H. Expression patterns of nestin and dentin sialoprotein during dentinogenesis in mice. Biomed Res 2012; 33:119-32. [DOI: 10.2220/biomedres.33.119] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
24
|
Janebodin K, Horst OV, Ieronimakis N, Balasundaram G, Reesukumal K, Pratumvinit B, Reyes M. Isolation and characterization of neural crest-derived stem cells from dental pulp of neonatal mice. PLoS One 2011; 6:e27526. [PMID: 22087335 PMCID: PMC3210810 DOI: 10.1371/journal.pone.0027526] [Citation(s) in RCA: 109] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2010] [Accepted: 10/19/2011] [Indexed: 01/09/2023] Open
Abstract
Dental pulp stem cells (DPSCs) are shown to reside within the tooth and play an important role in dentin regeneration. DPSCs were first isolated and characterized from human teeth and most studies have focused on using this adult stem cell for clinical applications. However, mouse DPSCs have not been well characterized and their origin(s) have not yet been elucidated. Herein we examined if murine DPSCs are neural crest derived and determined their in vitro and in vivo capacity. DPSCs from neonatal murine tooth pulp expressed embryonic stem cell and neural crest related genes, but lacked expression of mesodermal genes. Cells isolated from the Wnt1-Cre/R26R-LacZ model, a reporter of neural crest-derived tissues, indicated that DPSCs were Wnt1-marked and therefore of neural crest origin. Clonal DPSCs showed multi-differentiation in neural crest lineage for odontoblasts, chondrocytes, adipocytes, neurons, and smooth muscles. Following in vivo subcutaneous transplantation with hydroxyapatite/tricalcium phosphate, based on tissue/cell morphology and specific antibody staining, the clones differentiated into odontoblast-like cells and produced dentin-like structure. Conversely, bone marrow stromal cells (BMSCs) gave rise to osteoblast-like cells and generated bone-like structure. Interestingly, the capillary distribution in the DPSC transplants showed close proximity to odontoblasts whereas in the BMSC transplants bone condensations were distant to capillaries resembling dentinogenesis in the former vs. osteogenesis in the latter. Thus we demonstrate the existence of neural crest-derived DPSCs with differentiation capacity into cranial mesenchymal tissues and other neural crest-derived tissues. In turn, DPSCs hold promise as a source for regenerating cranial mesenchyme and other neural crest derived tissues.
Collapse
Affiliation(s)
- Kajohnkiart Janebodin
- Department of Oral Health Sciences, School of Dentistry, University of Washington, Seattle, Washington, United States of America
- Department of Anatomy, Faculty of Dentistry, Mahidol University, Bangkok, Thailand
| | - Orapin V. Horst
- Departments of Dental Public Health Sciences and Endodontics, School of Dentistry, University of Washington, Seattle, Washington, United States of America
| | - Nicholas Ieronimakis
- Department of Pathology, Institute for Stem Cell and Regenerative Medicine, School of Medicine, University of Washington, Seattle, Washington, United States of America
| | - Gayathri Balasundaram
- Department of Pathology, Institute for Stem Cell and Regenerative Medicine, School of Medicine, University of Washington, Seattle, Washington, United States of America
| | - Kanit Reesukumal
- Department of Clinical Pathology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Busadee Pratumvinit
- Department of Clinical Pathology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Morayma Reyes
- Department of Oral Health Sciences, School of Dentistry, University of Washington, Seattle, Washington, United States of America
- Department of Pathology, Institute for Stem Cell and Regenerative Medicine, School of Medicine, University of Washington, Seattle, Washington, United States of America
| |
Collapse
|
25
|
Gerli R, Secciani I, Sozio F, Rossi A, Weber E, Lorenzini G. Absence of lymphatic vessels in human dental pulp: a morphological study. Eur J Oral Sci 2010; 118:110-7. [DOI: 10.1111/j.1600-0722.2010.00717.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
|
26
|
Synthesis and intracellular transportation of type I procollagen during functional differentiation of odontoblasts. Histochem Cell Biol 2009; 131:583-91. [DOI: 10.1007/s00418-009-0556-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/03/2009] [Indexed: 11/26/2022]
|
27
|
Abstract
The implantation of cultured dental cell-cell re-associations allows for the reproduction of fully formed teeth, crown morphogenesis, epithelial histogenesis, mineralized dentin and enamel deposition, and root-periodontium development. Since vascularization is critical for organogenesis and tissue engineering, this work aimed to study: (a) blood vessel formation during tooth development, (b) the fate of blood vessels in cultured teeth and re-associations, and (c) vascularization after in vivo implantation. Ex vivo, blood vessels developed in the dental mesenchyme from the cap to bell stages and in the enamel organ, shortly before ameloblast differentiation. In cultured teeth and re-associations, blood-vessel-like structures remained in the peridental mesenchyme, but never developed into dental tissues. After implantation, both teeth and re-associations became revascularized, although later in the case of the re-associations. In implanted re-associations, newly formed blood vessels originated from the host, allowing for their survival, and affording conditions organ growth, mineralization, and enamel secretion.
Collapse
Affiliation(s)
- A Nait Lechguer
- INSERM UMR 595, Faculté de Médecine, 11, rue Humann, 67085 Strasbourg cedex, France
| | | | | | | | | |
Collapse
|
28
|
Arfuso F. A study of physiologic angiogenesis in the human using the dental pulp as an in vivo model. ACTA ACUST UNITED AC 2007; 13:359-63. [PMID: 17090409 DOI: 10.1080/10623320600972101] [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: 10/23/2022]
Abstract
With the commonly used in vivo animal models of angiogenesis, direct extrapolation of results to the human is not possible. The results presented from this study exemplify various phases of angiogenesis, from cell migration to apoptosis. This supports the use of the dental pulp of the developing human tooth as a viable model of in vivo physiologic angiogenesis.
Collapse
Affiliation(s)
- Frank Arfuso
- School of Dentistry, Oral Health Centre of Western Australia, The University of Western Australia, Nedlands, Australia.
| |
Collapse
|
29
|
Srisuwan T, Tilkorn DJ, Wilson JL, Morrison WA, Messer HM, Thompson EW, Abberton KM. Molecular aspects of tissue engineering in the dental field. Periodontol 2000 2006; 41:88-108. [PMID: 16686928 DOI: 10.1111/j.1600-0757.2006.00176.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Tanida Srisuwan
- Bernard O'Brien Institute of Microsurgery, Fitzroy, Victoria, Australia
| | | | | | | | | | | | | |
Collapse
|
30
|
Veerayutthwilai O, Luis NA, Crumpton RM, MacDonald GH, Byers MR. Peripherin- and CGRP-immunoreactive nerve fibers in rat molars have different locations and developmental timing. Arch Oral Biol 2006; 51:748-60. [PMID: 16720017 DOI: 10.1016/j.archoralbio.2006.03.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2005] [Revised: 03/10/2006] [Accepted: 03/16/2006] [Indexed: 10/24/2022]
Abstract
UNLABELLED Developing rat molars gain mature sensitivity to electric stimulation at 4-5 weeks after eruption, but the related mechanisms are incompletely understood. Preliminary studies showed weak co-localization of calcitonin gene-related peptide (CGRP) immunoreactivity (IR) with peripherin (PER) or neurofilament protein (NF) in rat molar nerve fibers, while the latter two co-localized extensively. OBJECTIVE Our goal was to compare timing and location of PER-IR and CGRP-IR innervation in rat first molars during tooth maturation. METHODS We used single and double immunocytochemistry to study molars of rats aged 10 days to 1 year. Neural patterns were compared with odontoblast maturation stages, dentinogenesis, formation of cell-free and cell-rich zones, and root closure. RESULTS Spatial and temporal patterns showed that most CGRP-IR and PER-IR have different terminal domains in teeth. PER-IR fibers were well established among immature odontoblasts prior to tooth eruption, but CGRP-IR fibers were absent. Two weeks after eruption of first molars, many CGRP-IR beaded fibers entered dentin, the larger PER-IR fibers began shifting away from odontoblasts towards the pulp, and the symmetrical PER-IR pulpal pattern was being established. The CGRP-IR fibers continued to increase their asymmetric dentinal innervation until root growth was completed, during which time odontoblasts matured, the cell-free and cell-rich zones appeared, and roots closed. CONCLUSIONS Sensory maturation of rat molars coincides with closed root apices, extensive innervation of dentin by CGRP-IR nerve fibers, and the appearance of the mature avascular odontoblast layer next to cell-free and cell-rich zones in the pulp horns.
Collapse
|
31
|
Kato A, Suzuki M, Karasawa Y, Sugimoto T, Doi K. PTHrP and PTH/PTHrP receptor 1 expression in odontogenic cells of normal and HHM model rat incisors. Toxicol Pathol 2005; 33:456-64. [PMID: 16036863 DOI: 10.1080/01926230590959604] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Parathyroid hormone related peptide (PTHrP) was discovered as a causative factor of humoral hypercalcemia of malignancy (HHM). We examined PTHrP and its receptor (PTHR1) expression patterns in odontogenic cells in normal and HHM model rat incisors. Nontreated nude rats serving as the normal control and HHM model rats produced by implantation of PTHrP-expressing tumor (LC-6) cells were prepared. HHM rats fractured its incisor, and histopathologically, restrict population of odontoblasts showed findings classified as "shortening of high columnar odontoblasts" and "dentin niche." The incisors were immunostained against PTHrP and PTHR1. In normal rats, PTHrP and PTHR1 colocalized in ameloblasts, cementoblasts, and odontoblastic cells from mesenchymal cells to columnar odontoblasts. In high columnar odontoblasts, PTHrP solely expressed. In the HHM animals, although the expression patterns were identical to those of the normal rats in normal area, the shortened high columnar odontoblasts maintained PTHR1 expression and dentin niche comprising odontoblastic cells expressed both proteins. In the HHM model, the protein expression patterns changed in the odontoblastic cells with histological anomalies, and thus direct relations between the anomalies and PTHrP/PTHR1 axis are suggested.
Collapse
Affiliation(s)
- Atsuhiko Kato
- Safety Assessment Department, Chugai Pharmaceutical Co. Ltd., 1-135 Komakado, Gotemba-shi, Shizuoka 412-8513, Japan.
| | | | | | | | | |
Collapse
|
32
|
Kato A, Suzuki M, Karasawa Y, Sugimoto T, Doi K. Immunohistochemical Detection of PTHrP and PTH/PTHrP Receptor 1 on the Odontoblastic Reparative Process after Actinomycin D Treatment in Rats. J Toxicol Pathol 2005. [DOI: 10.1293/tox.18.33] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Affiliation(s)
- Atsuhiko Kato
- Safety Assessment Department, Chugai Pharmaceutical Co., Ltd
| | - Masami Suzuki
- Safety Assessment Department, Chugai Pharmaceutical Co., Ltd
| | - Yayoi Karasawa
- Safety Assessment Department, Chugai Pharmaceutical Co., Ltd
| | | | - Kunio Doi
- Department of Veterinary Pathology, Faculty of Agriculture, University of Tokyo
| |
Collapse
|
33
|
Trubiani O, Tripodi D, Delle Fratte T, Caputi S, Di Primio R. Human dental pulp vasculogenesis evaluated by CD34 antigen expression and morphological arrangement. J Dent Res 2003; 82:742-7. [PMID: 12939361 DOI: 10.1177/154405910308200916] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Vasculogenesis describes the process by which endothelial precursor cells form new blood vessels. To characterize the topography and the cellular processes underlying vascularization of human dental pulp, we examiend the expression of the human hematopoietic progenitor cell antigen CD34. Dental pulps, obtained from deciduous and permanent teeth, were morphologically examined at light- and electron-microscope levels and by expression of CD34. The findings indicate that vasculogenesis of dental pulp is a complicated process starting from single CD34(+) cells. These subsequently coalesce to form solid vascular cords inside the developing connective tissue, which later hollows. Pericytes were embedded within the fully formed microvessels' basement membrane. The presence of CD34(+) endothelial cells in permanent teeth reveals that the process of vasculogenesis persists into adult life, where it contributes to continuous adjustment of vessel and network structures in response to functional needs and dental tissue homeostasis.
Collapse
Affiliation(s)
- O Trubiani
- Dipartimento di Scienze Odontostomatologiche, Università di Chieti, Via dei Vestini 32, 66100 Chieti, Italy.
| | | | | | | | | |
Collapse
|
34
|
Botero TM, Mantellini MG, Song W, Hanks CT, Nör JE. Effect of lipopolysaccharides on vascular endothelial growth factor expression in mouse pulp cells and macrophages. Eur J Oral Sci 2003; 111:228-34. [PMID: 12786954 DOI: 10.1034/j.1600-0722.2003.00041.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Vascular endothelial growth factor (VEGF), a potent pro-angiogenic factor, might regulate the neovascularization observed in the pulp of teeth with deep caries. The purpose of this in vitro study was to evaluate the effect of bacterial lipopolysaccharides (LPS) on VEGF expression in dental pulp cells. Mouse odontoblast-like cells (MDPC-23) or undifferentiated pulp cells (OD-21) were exposed to 0-20 microg ml-1Escherichia coli LPS or 0-80 microg ml-1Prevotella intermedia LPS. As controls, mouse macrophages or gingival fibroblasts were exposed to LPS, since these cells are known to secrete VEGF. The VEGF expression was evaluated by reverse transcriptase polymerase chain reaction or enzyme-linked immunosorbent assay. The baseline expression levels of VEGF protein were higher in MDPC-23 and OD-21 than in fibroblasts or macrophages. Vascular endothelial growth factor protein expression was upregulated in MDPC-23 and macrophages exposed to E. coli LPS, but not in OD-21 cells or fibroblasts. Higher concentrations of P. intermedia LPS were required to induce VEGF expression in MDPC-23 cells. Treatment with LPS did not affect VEGF expression at the mRNA level in any of the cells evaluated. These results demonstrate that bacterial LPS upregulates VEGF expression in odontoblast-like cells and macrophages, and suggest that the regulation of VEGF expression occurs primarily at a post-transcriptional level.
Collapse
Affiliation(s)
- Tatiana M Botero
- Department of Cariology, Restorative Sciences, and Endodontics, University of Michigan School of Dentistry, 1011 North University, Ann Arbor, MI 48109-1078, USA
| | | | | | | | | |
Collapse
|
35
|
Ohshima H, Nakakura-Ohshima K, Yamamoto H, Maeda T. Alteration in the expression of heat shock protein (Hsp) 25-immunoreactivity in the dental pulp of rat molars following tooth replantation. ARCHIVES OF HISTOLOGY AND CYTOLOGY 2001; 64:425-37. [PMID: 11757911 DOI: 10.1679/aohc.64.425] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The regeneration process of dental pulp following tooth replantation in rat molars was investigated by immunocytochemistry for heat shock protein (Hsp) 25 and protein gene product 9.5 (PGP 9.5). In control teeth at postnatal 4 weeks, the odontoblasts showed intense Hsp 25-immunoreactivity in the coronal dental pulp, but little or no immunoreactivity in the root and floor pulp. In contrast, the Hsp 25-negative odontoblasts in the latter areas displayed immunoreactivity for PGP 9.5. Tooth replantation caused loss of Hsp 25- and PGP 9.5-immunoreactions in the dental pulp during postoperative days 1-3. At postoperative day 5, plump cells with clear nucleoli and several fine processes--presumably newly differentiated odontoblasts--at the pulp-dentin border became immunopositive for Hsp 25. These data suggest that the expression of Hsp 25- and PGP 9.5-immunoreactivity reflects the status of differentiation of the odontoblasts. Furthermore, some pulpal nerve fibers as well as the Schwann cells in the dental pulp, ordinarily negative in Hsp 25-immunoreaction, acquired their immunoreactivity by postoperative day 5, but lost it thereafter, suggesting the involvement of Hsp 25 in the regeneration of pulpal nerve fibers. In the case of bone-like tissue formation in the pulp space, on the other hand, no Hsp 25-immunoreactive odontoblasts were recognized in the pulp-dentin border. Thus, the alignment of Hsp 25-immunopositive odontoblasts along the pulp-dentin border indicates a decisive factor for inducing the reparative dentin formation after tooth replantation.
Collapse
Affiliation(s)
- H Ohshima
- Department of Oral Biological Science, Niigata University Graduate School of Medical and Dental Sciences, Japan.
| | | | | | | |
Collapse
|
36
|
Abstract
The importance of growth factors in mediating the cellular responses to injury in the dentine-pulp complex is well recognized and several growth factors are reportedly sequestered in dentine matrix from where they may be released during repair processes. Local angiogenesis at the injury site appears to be critical for successful pulpal repair. Here, soluble and insoluble matrix fractions were isolated from human dentine and the amounts of several important angiogenic growth factors in these fractions measured by enzyme-linked immunosorbent assay (ELISA). The EDTA-soluble matrix fraction contained high concentrations of platelet-derived growth factor (PDGF-AB), lower concentrations of vascular endothelial growth factor (VEGF), placenta growth factor (PlGF) and fibroblast growth factor (FGF2), and very low concentrations of epidermal growth factor (EGF). No FGF2 or PlGF could be detected in the insoluble matrix fractions, but these fractions contained some VEGF, lower concentrations of PDGF-AB and very low concentrations of EGF. It was concluded that dentine matrix contains angiogenic growth factors and that their release from the matrix after injury could make an important contribution to the overall reparative response of the dentine-pulp complex.
Collapse
Affiliation(s)
- D J Roberts-Clark
- Oral Biology, School of Dentistry, University of Birmingham, St. Chad's Queensway, B4 6NN, Birmingham, UK
| | | |
Collapse
|
37
|
Abstract
This study describes the spatio-temporal expression of basic Fibroblast growth factor (FGF-2) during odontogenesis of mouse as revealed by immunohistology. Parasagittal sections of mouse embryo head (13-18 day of gestation) containing various stages of developing tooth were incubated with a polyclonal anti-FGF-2 antibody and positive binding was evidentiated by using Streptavidin-Biotin complex-HRP system and AEC staining. We observed no FGF-2 staining at the dental lamina stage. At the bud stage slight staining is seen, limited to some epithelial cells. The intensity of the staining increases at the cap stage. In the bell stage, the stellate reticulum cells stain intensely. Later, odontoblasts and the dentin matrix stain deeply; but the epithelial cells stain faint. The extra cellular matrix of the dentin and dental papilla stain very intense but the enamel matrix is found negative. These results indicate the participation of FGF-2 in differentiation rather than in proliferation of tooth-forming cells. In particular, it appears that FGF-2 participates in odontoblast differentiation and in dentin matrix deposition. The spatio-temporally specific distribution pattern of FGF-2 in developing mouse tooth reported here emphasizes the importance of FGF-2 in mammalian odontogenesis.
Collapse
Affiliation(s)
- L G Russo
- Department of Structure, Function and Biotechnology, Faculty of Veterinary Medicine, University of Naples Federico II, Italy
| | | | | |
Collapse
|