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Aryal YP, Han SY, Rana B, Neupane S, Kim TY, Pokharel E, Ha JH, Jung JK, An CH, Kim JY, Yamamoto H, Lee Y, An SY, Suh JY, Kim JY, Sohn WJ. Prohibitin modulates periodontium differentiation in mice development. Front Cell Dev Biol 2024; 12:1369634. [PMID: 38756696 PMCID: PMC11096493 DOI: 10.3389/fcell.2024.1369634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Accepted: 03/29/2024] [Indexed: 05/18/2024] Open
Abstract
Introduction: Prohibitin (PHB) is an essential scaffold protein that modulates signaling pathways controlling cell survival, metabolism, inflammation, and bone formation. However, its specific role in periodontium development remains less understood. This study aims to elucidate the expression pattern and function of PHB in periodontium development and its involvement in alveolar bone formation. Methods: Immunolocalization of PHB in the periodontium of postnatal (PN) mice were examined. Phb morpholino was micro-injected into the right-side mandible at PN5, corresponding to the position where the alveolar bone process forms in relation to the lower first molar. The micro-injection with a scramble control (PF-127) and the left-side mandibles were used as control groups. Five days post-micro-injection, immunohistochemical analysis and micro-CT evaluation were conducted to assess bone mass and morphological changes. Additionally, expression patterns of signaling molecules were examined following Phb downregulation using 24-h in vitro cultivation of developing dental mesenchyme at E14.5. Results: The immunostaining of PHB showed its localization in the periodontium at PN5, PN8, and PN10. The in vitro cultivation of dental mesenchyme resulted in alterations in Bmps, Runx2, and Wnt signalings after Phb knock-down. At 5 days post-micro-injection, Phb knocking down showed weak immunolocalizations of runt-related transcription factor (RUNX2) and osteocalcin (OCN). However, knocking down Phb led to histological alterations characterized by decreased bone mass and stronger localizations of Ki67 and PERIOSTIN in the periodontium compared 1 to control groups. The micro-CT evaluation showed decreased bone volume and increased PDL space in the Phb knock-down specimens, suggesting its regulatory role in bone formation. Discussion: The region-specific localization of PHB in the margin where alveolar bone forms suggests its involvement in alveolar bone formation and the differentiation of the periodontal ligament. Overall, our findings suggest that Phb plays a modulatory role in alveolar bone formation by harmoniously regulating bone-forming-related signaling molecules during periodontium development.
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Affiliation(s)
- Yam Prasad Aryal
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of Korea
- Department of Biological Sciences and Biotechnology, College of Natural Sciences, Chungbuk National University, Cheongju, Republic of Korea
| | - Song-Yi Han
- Department of Periodontology, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of Korea
| | - Bandana Rana
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of Korea
| | - Sanjiv Neupane
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of Korea
- Department of Biochemistry and Cell Biology, Stony Brook University, Stony Brook, United Sates
| | - Tae-Young Kim
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of Korea
| | - Elina Pokharel
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of Korea
| | - Jung-Hong Ha
- Department of Conservative Dentistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of Korea
| | - Jae-Kwang Jung
- Department of Oral Medicine, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of Korea
| | - Chang-Hyeon An
- Department of Oral and Maxillofacial Radiology, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of Korea
| | - Ji-Youn Kim
- Department of Dental Hygiene, Gachon University, Incheon, Republic of Korea
| | - Hitoshi Yamamoto
- Department of Histology and Developmental Biology, Tokyo Dental College, Toky, Japan
| | - Youngkyun Lee
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of Korea
| | - Seo-Young An
- Department of Oral and Maxillofacial Radiology, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of Korea
| | - Jo-Young Suh
- Department of Periodontology, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of Korea
| | - Jae-Young Kim
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of Korea
| | - Wern-Joo Sohn
- College of K-Biohealth, Daegu Haany University, Gyeongsan, Republic of Korea
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Neupane S, Aryal YP, Kwak HJ, Lee SG, Kim TY, Pokharel E, Kim JY, Kim JH, Sohn WJ, An SY, An CH, Jung JK, Ha JH, Yamamoto H, Cho SW, Lee S, Lee Y, Park KK, Min BK, Park C, Kwon TY, Cho SJ, Kim JY. Developmental roles of glomerular epithelial protein-1 in mice molar morphogenesis. Cell Tissue Res 2024; 395:53-62. [PMID: 37985496 DOI: 10.1007/s00441-023-03841-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Accepted: 10/27/2023] [Indexed: 11/22/2023]
Abstract
Glomerular epithelial protein-1 (Glepp1), a R3 subtype family of receptor-type protein tyrosine phosphatases, plays important role in the activation of Src family kinases and regulates cellular processes such as cell proliferation, differentiation, and apoptosis. In this study, we firstly examined the functional evaluation of Glepp1 in tooth development and morphogenesis. The precise expression level and developmental function of Glepp1 were examined by RT-qPCR, in situ hybridization, and loss and gain of functional study using a range of in vitro organ cultivation methods. Expression of Glepp1 was detected in the developing tooth germs in cap and bell stage of tooth development. Knocking down Glepp1 at E13 for 2 days showed the altered expression levels of tooth development-related signaling molecules, including Bmps, Dspp, Fgf4, Lef1, and Shh. Moreover, transient knock down of Glepp1 revealed alterations in cellular physiology, examined by the localization patterns of Ki67 and E-cadherin. Similarly, knocking down of Glepp1 showed disrupted enamel rod and interrod formation in 3-week renal transplanted teeth. In addition, due to attrition of odontoblastic layers, the expression signals of Dspp and the localization of NESTIN were almost not detected after knock down of Glepp1; however, their expressions were increased after Glepp1 overexpression. Thus, our results suggested that Glepp1 plays modulating roles during odontogenesis by regulating the expression levels of signaling molecules and cellular events to achieve the proper structural formation of hard tissue matrices in mice molar development.
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Affiliation(s)
- Sanjiv Neupane
- Department of Biochemistry, School of Dentistry, Kyungpook National University, Daegu, Korea
- Department of Biochemistry and Cell Biology, Stony Brook University, Stony Brook, USA
| | - Yam Prasad Aryal
- Department of Biochemistry, School of Dentistry, Kyungpook National University, Daegu, Korea
| | - Hee-Jin Kwak
- School of Biological Sciences, College of Natural Sciences, Chungbuk National University, Cheongju, Korea
| | - Sung-Gwon Lee
- School of Biological Sciences and Technology, Chonnam National University, Gwangju, Korea
| | - Tae-Young Kim
- Department of Biochemistry, School of Dentistry, Kyungpook National University, Daegu, Korea
| | - Elina Pokharel
- Department of Biochemistry, School of Dentistry, Kyungpook National University, Daegu, Korea
| | - Ji-Youn Kim
- Department of Dental Hygiene, Gachon University, Incheon, Korea
| | - Jung-Hyeuk Kim
- School of Biological Sciences, College of Natural Sciences, Chungbuk National University, Cheongju, Korea
| | - Wern-Joo Sohn
- Pre-Major of Cosmetics and Pharmaceutics, Daegu Haany University, Gyeongsan, Korea
| | - Seo-Young An
- Department of Oral and Maxillofacial Radiology, School of Dentistry, Kyungpook National University, Daegu, Korea
| | - Chang-Hyeon An
- Department of Oral and Maxillofacial Radiology, School of Dentistry, Kyungpook National University, Daegu, Korea
| | - Jae-Kwang Jung
- Department of Oral Medicine, School of Dentistry, Kyungpook National University, Daegu, Korea
| | - Jung-Hong Ha
- Department of Conservative Dentistry, School of Dentistry, Kyungpook National University, Daegu, Korea
| | - Hitoshi Yamamoto
- Department of Histology and Developmental Biology, Tokyo Dental College, Tokyo, Japan
| | - Sung-Won Cho
- Division of Anatomy and Developmental Biology, Department of Oral Biology, Yonsei University College of Dentistry, Seoul, Korea
| | - Sanggyu Lee
- School of Life Science, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University, Daegu, Korea
| | - Youngkyun Lee
- Department of Biochemistry, School of Dentistry, Kyungpook National University, Daegu, Korea
| | - Kwang-Kyun Park
- Professor Emeritus Department of Oral Biology, Yonsei University College of Dentistry, Seoul, Korea
| | - Bong-Ki Min
- Center for Research Facilities, Yeungnam University, Gyeongsan, Korea
| | - Chungoo Park
- School of Biological Sciences and Technology, Chonnam National University, Gwangju, Korea
| | - Tae-Yub Kwon
- Department of Dental Biomaterials, School of Dentistry, Kyungpook National University, Daegu, Korea
| | - Sung-Jin Cho
- School of Biological Sciences, College of Natural Sciences, Chungbuk National University, Cheongju, Korea.
| | - Jae-Young Kim
- Department of Biochemistry, School of Dentistry, Kyungpook National University, Daegu, Korea.
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Xu K, Chu Y, Liu Q, Fan W, He H, Huang F. NEDD4 E3 Ligases: Functions and Mechanisms in Bone and Tooth. Int J Mol Sci 2022; 23:ijms23179937. [PMID: 36077334 PMCID: PMC9455957 DOI: 10.3390/ijms23179937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 08/26/2022] [Accepted: 08/29/2022] [Indexed: 11/29/2022] Open
Abstract
Protein ubiquitination is a precisely controlled enzymatic cascade reaction belonging to the post-translational modification of proteins. In this process, E3 ligases catalyze the binding of ubiquitin (Ub) to protein substrates and define specificity. The neuronally expressed developmentally down-regulated 4 (NEDD4) subfamily, belonging to the homology to E6APC terminus (HECT) class of E3 ligases, has recently emerged as an essential determinant of multiple cellular processes in different tissues, including bone and tooth. Here, we place special emphasis on the regulatory role of the NEDD4 subfamily in the molecular and cell biology of osteogenesis. We elucidate in detail the specific roles, downstream substrates, and upstream regulatory mechanisms of the NEDD4 subfamily. Further, we provide an overview of the involvement of E3 ligases and deubiquitinases in the development, repair, and regeneration of another mineralized tissue—tooth.
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Affiliation(s)
- Ke Xu
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou 510008, China
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510008, China
| | - Yanhao Chu
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou 510008, China
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510008, China
| | - Qin Liu
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou 510008, China
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510008, China
| | - Wenguo Fan
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou 510008, China
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510008, China
| | - Hongwen He
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510008, China
- Correspondence: (H.H.); (F.H.)
| | - Fang Huang
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou 510008, China
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510008, China
- Correspondence: (H.H.); (F.H.)
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Lee ES, Aryal YP, Kim TY, Kim JY, Yamamoto H, An CH, An SY, Lee Y, Sohn WJ, Jung JK, Ha JH, Kim JY. Facilitation of Reparative Dentin Using a Drug Repositioning Approach With 4-Phenylbutric Acid. Front Physiol 2022; 13:885593. [PMID: 35600310 PMCID: PMC9114641 DOI: 10.3389/fphys.2022.885593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 04/20/2022] [Indexed: 11/23/2022] Open
Abstract
For hard tissue formation, cellular mechanisms, involved in protein folding, processing, and secretion play important roles in the endoplasmic reticulum (ER). In pathological and regeneration conditions, ER stress hinders proper formation and secretion of proteins, and tissue regeneration by unfolded protein synthesis. 4-Phenylbutyric acid (4PBA) is a chemical chaperone that alleviates ER stress through modulation in proteins folding and protein trafficking. However, previous studies about 4PBA only focused on the metabolic diseases rather than on hard tissue formation and regeneration. Herein, we evaluated the function of 4PBA in dentin regeneration using an exposed pulp animal model system via a local delivery method as a drug repositioning strategy. Our results showed altered morphological changes and cellular physiology with histology and immunohistochemistry. The 4PBA treatment modulated the inflammation reaction and resolved ER stress in the early stage of pulp exposure. In addition, 4PBA treatment activated blood vessel formation and TGF-β1 expression in the dentin-pulp complex. Micro-computed tomography and histological examinations confirmed the facilitated formation of the dentin bridge in the 4PBA-treated specimens. These results suggest that proper modulation of ER stress would be an important factor for secretion and patterned formation in dentin regeneration.
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Affiliation(s)
- Eui-Seon Lee
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, Korea
| | - Yam Prasad Aryal
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, Korea
| | - Tae-Young Kim
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, Korea
| | - Ji-Youn Kim
- Department of Dental Hygiene, Gachon University, Incheon, South Korea
| | - Hitoshi Yamamoto
- Department of Histology and Developmental Biology, Tokyo Dental College, Tokyo, Japan
| | - Chang-Hyeon An
- Department of Oral and Maxillofacial Radiology, School of Dentistry, IHBR, Kyungpook National University, Daegu, Korea
| | - Seo-Young An
- Department of Oral and Maxillofacial Radiology, School of Dentistry, IHBR, Kyungpook National University, Daegu, Korea
| | - Youngkyun Lee
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, Korea
| | - Wern-Joo Sohn
- Pre-Major of Cosmetics and Pharmaceutics, Daegu Haany University, Gyeongsan, South Korea
| | - Jae-Kwang Jung
- Department of Oral Medicine, School of Dentistry, IHBR, Kyungpook National University, Daegu, Korea
| | - Jung-Hong Ha
- Department of Conservative Dentistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, South Korea
- *Correspondence: Jae-Young Kim, , orcid.org/0000-0002-6752-5683; Jung-Hong Ha, , orcid.org/0000-0002-0469-4324
| | - Jae-Young Kim
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, Korea
- *Correspondence: Jae-Young Kim, , orcid.org/0000-0002-6752-5683; Jung-Hong Ha, , orcid.org/0000-0002-0469-4324
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Aryal YP, Yeon CY, Kim TY, Lee ES, Sung S, Pokharel E, Kim JY, Choi SY, Yamamoto H, Sohn WJ, Lee Y, An SY, An CH, Jung JK, Ha JH, Kim JY. Facilitating Reparative Dentin Formation Using Apigenin Local Delivery in the Exposed Pulp Cavity. Front Physiol 2021; 12:773878. [PMID: 34955887 PMCID: PMC8703200 DOI: 10.3389/fphys.2021.773878] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Accepted: 11/08/2021] [Indexed: 01/03/2023] Open
Abstract
Apigenin, a natural product belonging to the flavone class, affects various cell physiologies, such as cell signaling, inflammation, proliferation, migration, and protease production. In this study, apigenin was applied to mouse molar pulp after mechanically pulpal exposure to examine the detailed function of apigenin in regulating pulpal inflammation and tertiary dentin formation. In vitro cell cultivation using human dental pulp stem cells (hDPSCs) and in vivo mice model experiments were employed to examine the effect of apigenin in the pulp and dentin regeneration. In vitro cultivation of hDPSCs with apigenin treatment upregulated bone morphogenetic protein (BMP)- and osteogenesis-related signaling molecules such as BMP2, BMP4, BMP7, bone sialoprotein (BSP), runt-related transcription factor 2 (RUNX2), and osteocalcin (OCN) after 14 days. After apigenin local delivery in the mice pulpal cavity, histology and cellular physiology, such as the modulation of inflammation and differentiation, were examined using histology and immunostainings. Apigenin-treated specimens showed period-altered immunolocalization patterns of tumor necrosis factor (TNF)-α, myeloperoxidase (MPO), NESTIN, and transforming growth factor (TGF)-β1 at 3 and 5 days. Moreover, the apigenin-treated group showed a facilitated dentin-bridge formation with few irregular tubules after 42 days from pulpal cavity preparation. Micro-CT images confirmed obvious dentin-bridge structures in the apigenin-treated specimens compared with the control. Apigenin facilitated the reparative dentin formation through the modulation of inflammation and the activation of signaling regulations. Therefore, apigenin would be a potential therapeutic agent for regenerating dentin in exposed pulp caused by dental caries and traumatic injury.
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Affiliation(s)
- Yam Prasad Aryal
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, South Korea
| | - Chang-Yeol Yeon
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, South Korea
| | - Tae-Young Kim
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, South Korea
| | - Eui-Seon Lee
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, South Korea
| | - Shijin Sung
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, South Korea
| | - Elina Pokharel
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, South Korea
| | - Ji-Youn Kim
- Department of Dental Hygiene, College of Health Science, Gachon University, Incheon, South Korea
| | - So-Young Choi
- Department of Oral and Maxillofacial Surgery, School of Dentistry, IHBR, Kyungpook National University, Daegu, South Korea
| | - Hitoshi Yamamoto
- Department of Histology and Developmental Biology, Tokyo Dental College, Tokyo, Japan
| | - Wern-Joo Sohn
- Pre-major of Cosmetics and Pharmaceutics, Daegu Haany University, Gyeongsan, South Korea
| | - Youngkyun Lee
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, South Korea
| | - Seo-Young An
- Department of Oral and Maxillofacial Radiology, School of Dentistry, IHBR, Kyungpook National University, Daegu, South Korea
| | - Chang-Hyeon An
- Department of Oral and Maxillofacial Radiology, School of Dentistry, IHBR, Kyungpook National University, Daegu, South Korea
| | - Jae-Kwang Jung
- Department of Oral Medicine, School of Dentistry, IHBR, Kyungpook National University, Daegu, South Korea
| | - Jung-Hong Ha
- Department of Conservative Dentistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, South Korea
| | - Jae-Young Kim
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, South Korea
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Islam R, Toida Y, Chen F, Tanaka T, Inoue S, Kitamura T, Yoshida Y, Chowdhury AFMA, Ahmed HMA, Sano H. Histological evaluation of a novel phosphorylated pullulan-based pulp capping material: An in vivo study on rat molars. Int Endod J 2021; 54:1902-1914. [PMID: 34096634 DOI: 10.1111/iej.13587] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 06/02/2021] [Accepted: 06/03/2021] [Indexed: 12/11/2022]
Abstract
AIM To evaluate the dental pulp response to a novel mineral trioxide aggregate containing phosphorylated pullulan (MTAPPL) in rats after direct pulp capping. METHODS Ninety-six cavities were prepared in the maxillary first molars of 56 male Wistar rats. The dental pulps were intentionally exposed and randomly divided into four groups according to the application of pulp capping materials: MTAPPL; phosphorylated pullulan (PPL); a conventional MTA (Nex-Cem MTA, NCMTA; positive control); and Super-Bond (SB; negative control). All cavities were restored with SB and observed for pulpal responses at 1-, 3-, 7- and 28-day intervals using a histological scoring system. Statistical analysis was performed using Kruskal-Wallis and Mann-Whitney U-test with Bonferroni's correction, and the level of significance was set at 0.05. DMP1 and CD34 antigen were used to evaluate odontoblast differentiation and pulpal vascularization, respectively. RESULTS On day 1, mild inflammatory cells were present in MTAPPL and NCMTA groups; fewer inflammatory cells were present in the PPL, whereas SB was associated with a mild-to-moderate inflammatory response. A significant difference was observed between PPL and SB (p < .05). No mineralized tissue deposition was observed. On day 3, moderate-to-severe inflammatory cells were present in PPL and SB, whereas MTAPPL and NCMTA had a mild inflammatory response. Initial mineralized tissue deposition was observed in the NCMTA, MTAPPL and SB. A significant difference was observed between MTAPPL and PPL (p < .05). On day 7, a thin layer of mineralized tissue was observed in all tested groups with no or mild inflammatory response. On day 28, no inflammatory response was observed in MTAPPL, whereas NCMTA, PPL and SB had mild inflammatory responses. A significant difference was observed between MTAPPL and SB (p < .05). Complete mineralized tissue barrier formation was observed in MTAPPL, NCMTA and PPL with no significant difference (p > .05). SB exhibited incomplete mineralized tissue barriers, significantly different from NCMTA, MTAPPL and PPL (p < .05). The staining with CD34 was positive in all the groups on all observation days. CONCLUSION The favourable pulpal responses and induction of mineralized tissue formation associated with MTAPPL indicate its potential application as a direct pulp capping material.
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Affiliation(s)
- Rafiqul Islam
- Department of Restorative Dentistry, Faculty of Dental Medicine, Hokkaido University, Hokkaido, Japan
| | - Yu Toida
- Department of Restorative Dentistry, Faculty of Dental Medicine, Hokkaido University, Hokkaido, Japan
| | - Fei Chen
- Department of Restorative Dentistry, Faculty of Dental Medicine, Hokkaido University, Hokkaido, Japan
| | - Toru Tanaka
- Department of Restorative Dentistry, Faculty of Dental Medicine, Hokkaido University, Hokkaido, Japan
| | - Satoshi Inoue
- Section for Clinical Education, Faculty of Dental Medicine, Hokkaido University, Hokkaido, Japan
| | - Tetsuya Kitamura
- Department of Vascular Biology and Molecular Pathology, Faculty of Dental Medicine, Hokkaido University, Hokkaido, Japan
| | - Yasuhiro Yoshida
- Department of Biomaterials and Bioengineering, Faculty of Dental Medicine, Hokkaido University, Hokkaido, Japan
| | - Abu Faem Mohammad Almas Chowdhury
- Department of Restorative Dentistry, Faculty of Dental Medicine, Hokkaido University, Hokkaido, Japan.,Department of Conservative Dentistry and Endodontics, Sapporo Dental College and Hospital, Dhaka, Bangladesh
| | - Hany Mohamed Aly Ahmed
- Department of Restorative Dentistry, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
| | - Hidehiko Sano
- Department of Restorative Dentistry, Faculty of Dental Medicine, Hokkaido University, Hokkaido, Japan
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Aryal YP, Neupane S, Kim TY, Lee ES, Pokhrel NK, Yeon CY, Kim JY, An CH, An SY, Park EK, Ha JH, Jung JK, Yamamoto H, Cho SW, Lee S, Kim DY, Kwon TY, Lee Y, Sohn WJ, Kim JY. Developmental Roles of FUSE Binding Protein 1 ( Fubp1) in Tooth Morphogenesis. Int J Mol Sci 2020; 21:E8079. [PMID: 33138041 DOI: 10.3390/ijms21218079] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 10/16/2020] [Accepted: 10/27/2020] [Indexed: 12/27/2022] Open
Abstract
FUSE binding protein 1 (Fubp1), a regulator of the c-Myc transcription factor and a DNA/RNA-binding protein, plays important roles in the regulation of gene transcription and cellular physiology. In this study, to reveal the precise developmental function of Fubp1, we examined the detailed expression pattern and developmental function of Fubp1 during tooth morphogenesis by RT-qPCR, in situ hybridization, and knock-down study using in vitro organ cultivation methods. In embryogenesis, Fubp1 is obviously expressed in the enamel organ and condensed mesenchyme, known to be important for proper tooth formation. Knocking down Fubp1 at E14 for two days, showed the altered expression patterns of tooth development related signalling molecules, including Bmps and Fgf4. In addition, transient knock-down of Fubp1 at E14 revealed changes in the localization patterns of c-Myc and cell proliferation in epithelium and mesenchyme, related with altered tooth morphogenesis. These results also showed the decreased amelogenin and dentin sialophosphoprotein expressions and disrupted enamel rod and interrod formation in one- and three-week renal transplanted teeth respectively. Thus, our results suggested that Fubp1 plays a modulating role during dentinogenesis and amelogenesis by regulating the expression pattern of signalling molecules to achieve the proper structural formation of hard tissue matrices and crown morphogenesis in mice molar development.
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Aryal YP, Lee ES, Kim TY, Sung S, Kim JY, An SY, Jung JK, Ha JH, Suh JY, Yamamoto H, Sohn WJ, Cho SW, Lee Y, An CH, Kim JY. Stage-specific expression patterns of ER stress-related molecules in mice molars: Implications for tooth development. Gene Expr Patterns 2020; 37:119130. [PMID: 32758541 DOI: 10.1016/j.gep.2020.119130] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 07/27/2020] [Accepted: 07/27/2020] [Indexed: 01/13/2023]
Abstract
The endoplasmic reticulum (ER) is a site where protein folding and posttranslational modifications occur, but when unfolded or misfolded proteins accumulate in the ER lumen, an unfolded protein response (UPR) occurs. A UPR activates ER-stress signalling genes, including inositol-requiring enzyme-1 (Ire1), activating transcription factor 6 (Atf6), and double-stranded RNA-activated protein kinase-like endoplasmic reticulum kinase (Perk), to maintain homeostasis. The involvement of ER stress molecules in metabolic disease and hard tissue matrix formation has been established; however, an understanding of the role of ER-stress signalling molecules in tooth development is lacking. The aims of this study are to define the stage-specific expression patterns of ER stress-related molecules and to elucidate their putative functions in the organogenesis of teeth. This study leverages knowledge of the tissue morphology and expression patterns of a range of signalling molecules during tooth development. RT-qPCR, in situ hybridization, and immunohistochemistry analyses were performed to determine the stage-specific expression patterns of ER-stress-related signalling molecules at important stages of tooth development. RT-qPCR analyses showed that Atf6 and Perk have similar expression levels during all stages of tooth development; however, the expression levels of Ire1 and its downstream target X-box binding protein (Xbp1) increased significantly from the cap to the secretory stage of tooth development. In situ hybridization results revealed that Atf6 and Xbp1 were expressed in cells that form the enamel knot at cap stage and ameloblasts and odontoblasts at secretory stage in stage-specific patterns. In addition, Atf6, Ire1, and Xbp1 expression exhibited distinct localization patterns in secretory odontoblasts and ameloblasts of PN0 molars. Overall, our results strongly suggest that ER-stress molecules are involved in tooth development in response to protein overload that occurs during signaling modulations from enamel knots at cap stage and extracellular matrix secretion at secretory stage.
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Affiliation(s)
- Yam Prasad Aryal
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, 2177, Dalgubeol-daero, Jung-gu, Daegu, 41940, South Korea
| | - Eui-Seon Lee
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, 2177, Dalgubeol-daero, Jung-gu, Daegu, 41940, South Korea
| | - Tae-Young Kim
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, 2177, Dalgubeol-daero, Jung-gu, Daegu, 41940, South Korea
| | - Shijin Sung
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, 2177, Dalgubeol-daero, Jung-gu, Daegu, 41940, South Korea
| | - Ji-Youn Kim
- Department of Dental Hygiene, Gachon University, Incheon, South Korea
| | - Seo-Young An
- Department of Oral and Maxillofacial Radiology, School of Dentistry, IHBR, Kyungpook National University, 2177, Dalgubeol-daero, Jung-gu, Daegu, 41940, South Korea
| | - Jae-Kwang Jung
- Department of Oral Medicine, School of Dentistry, IHBR, Kyungpook National University, 2177, Dalgubeol-daero, Jung-gu, Daegu, 41940, South Korea
| | - Jung-Hong Ha
- Department of Conservative Dentistry, School of Dentistry, IHBR, Kyungpook National University, 2177, Dalgubeol-daero, Jung-gu, Daegu, 41940, South Korea
| | - Jo-Young Suh
- Department of Periodontology, School of Dentistry, IHBR, Kyungpook National University, 2177, Dalgubeol-daero, Jung-gu, Daegu, 41940, South Korea
| | - Hitoshi Yamamoto
- Department of Histology and Developmental Biology, Tokyo Dental College, Tokyo, Japan
| | - Wern-Joo Sohn
- Pre-Major of Cosmetics and Pharmaceutics, Daegu Haany University, Gyeongsan, South Korea
| | - Sung-Won Cho
- Division in Anatomy and Developmental Biology, Department of Oral Biology, Yonsei University College of Dentistry, Seoul, South Korea
| | - Youngkyun Lee
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, 2177, Dalgubeol-daero, Jung-gu, Daegu, 41940, South Korea
| | - Chang-Hyeon An
- Department of Oral and Maxillofacial Radiology, School of Dentistry, IHBR, Kyungpook National University, 2177, Dalgubeol-daero, Jung-gu, Daegu, 41940, South Korea
| | - Jae-Young Kim
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, 2177, Dalgubeol-daero, Jung-gu, Daegu, 41940, South Korea.
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9
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Okamoto M, Matsumoto S, Sugiyama A, Kanie K, Watanabe M, Huang H, Ali M, Ito Y, Miura J, Hirose Y, Uto K, Ebara M, Kato R, Yamawaki-Ogata A, Narita Y, Kawabata S, Takahashi Y, Hayashi M. Performance of a Biodegradable Composite with Hydroxyapatite as a Scaffold in Pulp Tissue Repair. Polymers (Basel) 2020; 12:E937. [PMID: 32316615 PMCID: PMC7240495 DOI: 10.3390/polym12040937] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 04/14/2020] [Accepted: 04/15/2020] [Indexed: 02/07/2023] Open
Abstract
Vital pulp therapy is an important endodontic treatment. Strategies using growth factors and biological molecules are effective in developing pulp capping materials based on wound healing by the dentin-pulp complex. Our group developed biodegradable viscoelastic polymer materials for tissue-engineered medical devices. The polymer contents help overcome the poor fracture toughness of hydroxyapatite (HAp)-facilitated osteogenic differentiation of pulp cells. However, the composition of this novel polymer remained unclear. This study evaluated a novel polymer composite, P(CL-co-DLLA) and HAp, as a direct pulp capping carrier for biological molecules. The biocompatibility of the novel polymer composite was evaluated by determining the cytotoxicity and proliferation of human dental stem cells in vitro. The novel polymer composite with BMP-2, which reportedly induced tertiary dentin, was tested as a direct pulp capping material in a rat model. Cytotoxicity and proliferation assays revealed that the biocompatibility of the novel polymer composite was similar to that of the control. The novel polymer composite with BMP-2-induced tertiary dentin, similar to hydraulic calcium-silicate cement, in the direct pulp capping model. The BMP-2 composite upregulated wound healing-related gene expression compared to the novel polymer composite alone. Therefore, we suggest that novel polymer composites could be effective carriers for pulp capping.
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Affiliation(s)
- Motoki Okamoto
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, 1-8, Yamadaoka, Suita, Osaka 565-0871, Japan; (S.M.); (M.W.); (H.H.); (M.A.); (Y.I.); (Y.T.); (M.H.)
| | - Sayako Matsumoto
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, 1-8, Yamadaoka, Suita, Osaka 565-0871, Japan; (S.M.); (M.W.); (H.H.); (M.A.); (Y.I.); (Y.T.); (M.H.)
| | - Ayato Sugiyama
- Department of Basic Medicinal Science, Nagoya University, Chikusa, Nagoya 464-8601, Japan; (A.S.); (K.K.); (R.K.)
| | - Kei Kanie
- Department of Basic Medicinal Science, Nagoya University, Chikusa, Nagoya 464-8601, Japan; (A.S.); (K.K.); (R.K.)
| | - Masakatsu Watanabe
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, 1-8, Yamadaoka, Suita, Osaka 565-0871, Japan; (S.M.); (M.W.); (H.H.); (M.A.); (Y.I.); (Y.T.); (M.H.)
| | - Hailing Huang
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, 1-8, Yamadaoka, Suita, Osaka 565-0871, Japan; (S.M.); (M.W.); (H.H.); (M.A.); (Y.I.); (Y.T.); (M.H.)
| | - Manahil Ali
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, 1-8, Yamadaoka, Suita, Osaka 565-0871, Japan; (S.M.); (M.W.); (H.H.); (M.A.); (Y.I.); (Y.T.); (M.H.)
| | - Yuki Ito
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, 1-8, Yamadaoka, Suita, Osaka 565-0871, Japan; (S.M.); (M.W.); (H.H.); (M.A.); (Y.I.); (Y.T.); (M.H.)
| | - Jiro Miura
- Division for Interdisciplinary Dentistry, Osaka University Dental Hospital, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan;
| | - Yujiro Hirose
- Department of Oral and Molecular Microbiology, Osaka University Graduate School of Dentistry, Suita, Osaka 565-0871, Japan; (Y.H.); (S.K.)
| | - Koichiro Uto
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1 Chome-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan; (K.U.); (M.E.)
| | - Mitsuhiro Ebara
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1 Chome-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan; (K.U.); (M.E.)
| | - Ryuji Kato
- Department of Basic Medicinal Science, Nagoya University, Chikusa, Nagoya 464-8601, Japan; (A.S.); (K.K.); (R.K.)
- Institute of Nano-Life-Systems, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Aika Yamawaki-Ogata
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan; (A.Y.-O.); (Y.N.)
| | - Yuji Narita
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan; (A.Y.-O.); (Y.N.)
| | - Shigetada Kawabata
- Department of Oral and Molecular Microbiology, Osaka University Graduate School of Dentistry, Suita, Osaka 565-0871, Japan; (Y.H.); (S.K.)
| | - Yusuke Takahashi
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, 1-8, Yamadaoka, Suita, Osaka 565-0871, Japan; (S.M.); (M.W.); (H.H.); (M.A.); (Y.I.); (Y.T.); (M.H.)
| | - Mikako Hayashi
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, 1-8, Yamadaoka, Suita, Osaka 565-0871, Japan; (S.M.); (M.W.); (H.H.); (M.A.); (Y.I.); (Y.T.); (M.H.)
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10
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Adhikari N, Neupane S, Aryal YP, Choi M, Sohn WJ, Lee Y, Jung JK, Ha JH, Choi SY, Suh JY, Kim JY, Rho MC, Lee TH, Yamamoto H, An CH, Kim SH, An SY, Kim JY. Effects of oleanolic acid acetate on bone formation in an experimental periodontitis model in mice. J Periodontal Res 2019; 54:533-545. [PMID: 30982986 DOI: 10.1111/jre.12657] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 02/06/2019] [Accepted: 03/18/2019] [Indexed: 12/13/2022]
Abstract
OBJECTIVE We evaluated the role of oleanolic acid acetate (OAA), a triterpenoid commonly used in the treatment of liver disorders, inflammatory diseases, and metastasis, in bone formation after tooth loss by periodontitis. BACKGROUND Periodontitis causes the sequential degradation of the alveolar bone and associated structures, resulting in tooth loss. Several studies have attempted to regenerate the bone for implantation following tooth loss. METHODS Maxillary left second molar was extracted from 8-week-old male mice following induction of periodontitis by ligature for 5 days. The extraction socket was treated with 50 ng/µL OAA for 1, 2, and 3 weeks. Detailed morphological changes were examined using Masson's trichrome staining, and the precise localization patterns of various signaling molecules, including CD31, F4/80, interleukin (IL)-6, and osteocalcin, were observed. The volume of bone formation was examined by Micro-CT. Osteoclasts were enumerated using tartrate-resistant acid phosphatase (TRAP) staining. For molecular dissection of signaling molecules, we employed the hanging-drop in vitro cultivation method at E14 for 1 day and examined the expression pattern of transforming growth factor (TGF)-β superfamily and Wnt signaling genes. RESULTS Histomorphometrical examinations showed facilitated bone formation in the extraction socket following OAA treatment. In addition, OAA-treated specimens showed the altered localization patterns of inflammatory and bone formation-related signaling molecules including CD31, F4/80, IL-6, and osteocalcin. Also, embryonic tooth germ mesenchymal tissue cultivation with OAA treatment showed the significant altered expression patterns of signaling molecules such as transforming growth factor (TGF)-β superfamily and Wnt signaling. CONCLUSIONS Oleanolic acid acetate induces bone formation and remodeling through proper modulation of osteoblast, osteoclast, and inflammation with regulations of TGF-β and Wnt signaling.
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Affiliation(s)
- Nirpesh Adhikari
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, Korea
| | - Sanjiv Neupane
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, Korea
| | - Yam Prasad Aryal
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, Korea
| | - Mi Choi
- Department of Oral and Maxillofacial Radiology, School of Dentistry, IHBR, Kyungpook National University, Daegu, Korea
| | - Wern-Joo Sohn
- Pre-Major of Cosmetics and Pharmaceutics, Daegu Haany University, Gyeongsan, Korea
| | - Youngkyun Lee
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, Korea
| | - Jae-Kwang Jung
- Department of Oral Medicine, School of Dentistry, IHBR, Kyungpook National University, Daegu, South Korea
| | - Jung-Hong Ha
- Department of Conservative Dentistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, Korea
| | - So-Young Choi
- Department of Oral and Maxillofacial Surgery, School of Dentistry, IHBR, Kyungpook National University, Daegu, Korea
| | - Jo-Young Suh
- Department of Periodontology, School of Dentistry, IHBR, Kyungpook National University, Daegu, Korea
| | - Ji-Youn Kim
- Department of Dental Hygiene, College of Health Science, Gachon University, Incheon, Korea
| | - Mun-Chual Rho
- Immunoregulatory Material Research Center, Korea Research Institute of Bioscience and Biotechnology, Jeongeup-si, Korea
| | - Tae-Hoon Lee
- Department of Oral Biochemistry, Dental Science Research Institute, Medical Research Center for Biomineralization Disorders, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Hitoshi Yamamoto
- Department of Histology and Developmental Biology, Tokyo Dental College, Tokyo, Japan
| | - Chang-Hyeon An
- Department of Oral and Maxillofacial Radiology, School of Dentistry, IHBR, Kyungpook National University, Daegu, Korea
| | - Sang-Hyun Kim
- Department of Pharmacology, School of Medicine, Kyungpook National University, Daegu, Korea
| | - Seo-Young An
- Department of Oral and Maxillofacial Radiology, School of Dentistry, IHBR, Kyungpook National University, Daegu, Korea
| | - Jae-Young Kim
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, Korea
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11
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Aryal YP, Neupane S, Adhikari N, An C, Ha J, Kwon T, Yamamoto H, Jung J, Park E, Kim J, Cho S, Sohn W, Lee Y, Chae H, Kim H, Kim J. An endoplasmic reticulum stress regulator,
Tmbim6
, modulates secretory stage of mice molar. J Cell Physiol 2019; 234:20354-20365. [DOI: 10.1002/jcp.28635] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Revised: 03/21/2019] [Accepted: 03/25/2019] [Indexed: 01/06/2023]
Affiliation(s)
- Yam Prasad Aryal
- Department of Biochemistry, School of Dentistry, IHBR Kyungpook National University Daegu Korea
| | - Sanjiv Neupane
- Department of Biochemistry, School of Dentistry, IHBR Kyungpook National University Daegu Korea
| | - Nirpesh Adhikari
- Department of Biochemistry, School of Dentistry, IHBR Kyungpook National University Daegu Korea
| | - Chang‐Hyeon An
- Department of Oral and Maxillofacial Radiology, School of Dentistry, IHBR Kyungpook National University Daegu Korea
| | - Jung‐Hong Ha
- Department of Conservative Dentistry, School of Dentistry, IHBR Kyungpook National University Daegu Korea
| | - Tae‐Yub Kwon
- Department of Dental Biomaterials, School of Dentistry, IHBR Kyungpook National University Daegu Korea
| | - Hitoshi Yamamoto
- Department of Histology and Developmental Biology Tokyo Dental College Tokyo Japan
| | - Jae‐Kwang Jung
- Department of Oral Medicine, School of Dentistry, IHBR Kyungpook National University Daegu Korea
| | - Eui‐Kyun Park
- Department of Oral Pathology and Regenerative Medicine, School of Dentistry, IHBR Kyungpook National University Daegu Korea
| | - Ji‐Youn Kim
- Department of Dental Hygiene Gachon University Incheon Korea
| | - Sung‐Won Cho
- Division in Anatomy and Developmental Biology, Department of Oral Biology Yonsei University College of Dentistry Seoul Korea
| | - Wern‐Joo Sohn
- Pre‐Major of Cosmetics and Pharmaceutics Daegu Haany University Gyeongsan Korea
| | - Youngkyun Lee
- Department of Biochemistry, School of Dentistry, IHBR Kyungpook National University Daegu Korea
| | - Han‐Jung Chae
- Department of Pharmacology and New Drug Development Institute Chonbuk National University Jeonju Korea
| | - Hyung‐Ryong Kim
- Institute of Tissue Regeneration Engineering (ITREN) Dankook University Cheonan Korea
| | - Jae‐Young Kim
- Department of Biochemistry, School of Dentistry, IHBR Kyungpook National University Daegu Korea
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12
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Hou T, Li S, Zhang G, Li Y. High-fluence low-power laser irradiation promotes odontogenesis and inflammation resolution in periodontitis by enhancing stem cell proliferation and differentiation. Int J Mol Med 2018; 42:2107-2119. [PMID: 30085334 PMCID: PMC6108882 DOI: 10.3892/ijmm.2018.3804] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2018] [Accepted: 07/25/2018] [Indexed: 11/05/2022] Open
Abstract
Periodontitis can exert a severe impact on the life of patients, and the use of stem cell therapy for this disease is promising. The inflammatory response consequent to periodontitis can promote stem cell proliferation. Activated inflammation triggers inhibitory cytokine secretion, thus reducing inflammation subsequent to stem cell activation. High-fluence low-power laser irradiation (HF-LPLI) has the ability to regulate stem cell function through its effect on inflammation. Thus, the aim of the present study was to examine whether HF-LPLI is able to activate stem cells to promote regeneration in periodontitis by promoting inflammation resolution, as well as to evaluate the underlying mechanism of action if an effect is observed. Stem cells were treated with HF-LPLI following inflammation activation. Reverse transcription-quantitative polymerase chain reaction and EdU assay were used to evaluate cell proliferation and differentiation. Flow cytometry and immunofluorescence were also used to detect the ability of HF-LPLI to regulate the surrounding inflammatory environment. Animal models of periodontal disease were treated with stem cells and HF-LPLI, and regeneration was detected by hematoxylin and eosin staining and in vivo imaging. It was observed that HF-LPLI promoted inflammation resolution by reducing the excessive inflammatory response, and finally stimulated stem cell proliferation and differentiation. Furthermore, in vivo results revealed that stem cells treated with HF-LPLI induced bone regeneration. HF-LPLI stimulated stem cell proliferation and differentiation by promoting inflammation resolution subsequent to stem cell activation, providing a new strategy for the clinical treatment of periodontitis.
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Affiliation(s)
- Tiejun Hou
- Department of Stomatology, Liaocheng People's Hospital, Liaocheng, Shandong 252000, P.R. China
| | - Shanyong Li
- Department of Stomatology, Liaocheng Third People's Hospital, Liaocheng, Shandong 252000, P.R. China
| | - Guangwei Zhang
- Department of Stomatology, Liaocheng Third People's Hospital, Liaocheng, Shandong 252000, P.R. China
| | - Yan Li
- Department of Stomatology, Liaocheng People's Hospital, Liaocheng, Shandong 252000, P.R. China
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