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Wu S, Bai X, Cai L, Ke Q, Zhang X. Dehydrocostus lactone (DHC) promotes osteoblastic differentiation and mineralization through p38/RUNX-2 signaling. J Biochem Mol Toxicol 2024; 38:e23601. [PMID: 38069819 DOI: 10.1002/jbt.23601] [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: 03/07/2023] [Revised: 09/09/2023] [Accepted: 11/20/2023] [Indexed: 01/18/2024]
Abstract
Dysregulation of osteoblastic differentiation is an important risk factor of osteoporosis, the therapy of which is challenging. Dehydrocostus lactone (DHC), a sesquiterpene isolated from medicinal plants, has displayed anti-inflammatory and antitumor properties. In this study, we investigated the effects of DHC on osteoblastic differentiation and mineralization of MC3T3-E1 cells. Interestingly, we found that DHC increased the expression of marker genes of osteoblastic differentiation, such as alkaline phosphatase (ALP), osteocalcin (OCN), and osteopontin (OPN). Additionally, DHC increased the expressions of collagen type I alpha 1 (Col1a1) and collagen type I alpha 2 (Col1a2). We also demonstrate that DHC increased ALP activity. Importantly, the Alizarin Red S staining assay revealed that DHC enhanced osteoblastic differentiation of MC3T3-E1 cells. Mechanistically, it is shown that DHC increased the expression of Runx-2, a central regulator of osteoblastic differentiation. Treatment with DHC also increased the levels of phosphorylated p38, and its blockage using its specific inhibitor SB203580 abolished the effects of DHC on runt-related transcription factor 2 (Runx-2) expression and osteoblastic differentiation, suggesting the involvement of p38. Based on these findings, we concluded that DHC might possess a capacity for the treatment of osteoporosis by promoting osteoblastic differentiation.
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Affiliation(s)
- Shiqiang Wu
- Department of Orthopaedic, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, China
| | - Xiaoming Bai
- The Second Clinical College, Fujian Medical University, Quanzhou, China
| | - Liquan Cai
- Department of Orthopaedic, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, China
| | - Qingfeng Ke
- Department of Orthopaedic, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, China
| | - Xiaolu Zhang
- Department of Orthopaedic, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, China
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2
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Rao P, Jing J, Fan Y, Zhou C. Spatiotemporal cellular dynamics and molecular regulation of tooth root ontogeny. Int J Oral Sci 2023; 15:50. [PMID: 38001110 PMCID: PMC10673972 DOI: 10.1038/s41368-023-00258-9] [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: 09/26/2023] [Revised: 10/25/2023] [Accepted: 11/03/2023] [Indexed: 11/26/2023] Open
Abstract
Tooth root development involves intricate spatiotemporal cellular dynamics and molecular regulation. The initiation of Hertwig's epithelial root sheath (HERS) induces odontoblast differentiation and the subsequent radicular dentin deposition. Precisely controlled signaling pathways modulate the behaviors of HERS and the fates of dental mesenchymal stem cells (DMSCs). Disruptions in these pathways lead to defects in root development, such as shortened roots and furcation abnormalities. Advances in dental stem cells, biomaterials, and bioprinting show immense promise for bioengineered tooth root regeneration. However, replicating the developmental intricacies of odontogenesis has not been resolved in clinical treatment and remains a major challenge in this field. Ongoing research focusing on the mechanisms of root development, advanced biomaterials, and manufacturing techniques will enable next-generation biological root regeneration that restores the physiological structure and function of the tooth root. This review summarizes recent discoveries in the underlying mechanisms governing root ontogeny and discusses some recent key findings in developing of new biologically based dental therapies.
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Affiliation(s)
- Pengcheng Rao
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Junjun Jing
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yi Fan
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & West China Hospital of Stomatology, Sichuan University, Chengdu, China
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Chenchen Zhou
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & West China Hospital of Stomatology, Sichuan University, Chengdu, China.
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Department of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
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3
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Lu Y, Ma ZX, Deng R, Jiang HT, Chu L, Deng ZL. The SIRT1 activator SRT2104 promotes BMP9-induced osteogenic and angiogenic differentiation in mesenchymal stem cells. Mech Ageing Dev 2022; 207:111724. [PMID: 35985370 DOI: 10.1016/j.mad.2022.111724] [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: 04/19/2022] [Revised: 08/11/2022] [Accepted: 08/12/2022] [Indexed: 10/15/2022]
Abstract
Bone defects resulting from trauma, bone tumors, infections and skeletal abnormalities are a common osteoporotic condition with respect to clinical treatment. Of the known bone morphogenetic proteins (BMPs), BMP9 has the strongest osteogenic differentiation potential, which could be beneficial in the construction of tissue-engineered bone. Silent mating type information regulator 2 homolog-1 (SIRT1) is a highly conserved nicotinamide adenine dinucleotide-dependent deacetylase that deacetylates and modulates histone or non-histone substrates. However, the role of SIRT1 in BMP9-induced osteogenic differentiation of stem cells has not been studied. Furthermore, it is unclear whether SIRT1 interacts with the BMP/Smad and BMP/MAPK pathways in stem cells. We found that SIRT1 expression decreased gradually in a time-dependent manner during BMP9-induced osteogenic differentiation of MSCs. Interactions between SIRT1 and Smad7 promoted degradation of Smad7 and increased Smad1/5/8 phosphorylation. SRT2104, an activator of SIRT, enhanced the expression of osteogenic- and angiogenic-related proteins in BMP9-induced MSCs. In addition, we found that activation of the BMP/MAPK pathway led to osteogenic and angiogenic differentiation of MSCs. Our study demonstrated that SIRT1 expression decreased during BMP9-induced differentiation. The SIRT1 activator SRT2104 promoted BMP9-induced osteogenic and angiogenic differentiation of MSCs through the BMP/Smad and BMP/MAPK signaling pathways.
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Affiliation(s)
- Yang Lu
- Department of Orthopaedics, The Second Affiliated Hospital of Chongqing Medical University, 76 Linjiang Road, Yuzhong District, Chongqing 400010, China
| | - Zhao-Xin Ma
- Department of Orthopaedic Surgery, The First Affiliated Hospital of Chongqing Medical University, 1 Youyi Road, Yuzhong, Chongqing 400016, China
| | - Rui Deng
- Department of Orthopaedics, The Second Affiliated Hospital of Chongqing Medical University, 76 Linjiang Road, Yuzhong District, Chongqing 400010, China
| | - Hai-Tao Jiang
- Department of Orthopaedics, The Second Affiliated Hospital of Chongqing Medical University, 76 Linjiang Road, Yuzhong District, Chongqing 400010, China
| | - Lei Chu
- Department of Orthopaedics, The Second Affiliated Hospital of Chongqing Medical University, 76 Linjiang Road, Yuzhong District, Chongqing 400010, China.
| | - Zhong-Liang Deng
- Department of Orthopaedics, The Second Affiliated Hospital of Chongqing Medical University, 76 Linjiang Road, Yuzhong District, Chongqing 400010, China.
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Morsczeck C. Mechanisms during Osteogenic Differentiation in Human Dental Follicle Cells. Int J Mol Sci 2022; 23:ijms23115945. [PMID: 35682637 PMCID: PMC9180518 DOI: 10.3390/ijms23115945] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 05/19/2022] [Accepted: 05/23/2022] [Indexed: 12/22/2022] Open
Abstract
Human dental follicle cells (DFCs) as periodontal progenitor cells are used for studies and research in regenerative medicine and not only in dentistry. Even if innovative regenerative therapies in medicine are often considered the main research area for dental stem cells, these cells are also very useful in basic research and here, for example, for the elucidation of molecular processes in the differentiation into mineralizing cells. This article summarizes the molecular mechanisms driving osteogenic differentiation of DFCs. The positive feedback loop of bone morphogenetic protein (BMP) 2 and homeobox protein DLX3 and a signaling pathway associated with protein kinase B (AKT) and protein kinase C (PKC) are presented and further insights related to other signaling pathways such as the WNT signaling pathway are explained. Subsequently, some works are presented that have investigated epigenetic modifications and non-coding ncRNAs and their connection with the osteogenic differentiation of DFCs. In addition, studies are presented that have shown the influence of extracellular matrix molecules or fundamental biological processes such as cellular senescence on osteogenic differentiation. The putative role of factors associated with inflammatory processes, such as interleukin 8, in osteogenic differentiation is also briefly discussed. This article summarizes the most important insights into the mechanisms of osteogenic differentiation in DFCs and is intended to be a small help in the direction of new research projects in this area.
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Affiliation(s)
- Christian Morsczeck
- Department of Oral and Maxillofacial Surgery, University Hospital Regensburg, Franz-Josef-Strauss-Allee 11, 93053 Regensburg, Germany
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Song T, Huang D, Song D. The potential regulatory role of BMP9 in inflammatory responses. Genes Dis 2021; 9:1566-1578. [PMID: 36157503 PMCID: PMC9485205 DOI: 10.1016/j.gendis.2021.08.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 07/24/2021] [Accepted: 08/20/2021] [Indexed: 11/16/2022] Open
Abstract
Inflammation is a protective response of the body to pathogens and injury. Hence, it is particularly important to explore the pathogenesis and key regulatory factors of inflammation. BMP9 is a unique member of the BMP family, which is widely known for its strong osteogenic potential and insensitivity to the inhibition of BMP3. Recently, several studies have reported an underlying pivotal link between BMP9 and inflammation. What is clear, though not well understood, is that BMP9 plays a role in inflammation in a carefully choreographed manner in different contexts. In this review, we have summarized current studies focusing on BMP9 and inflammation in various tissues and the latest advances in BMP9 expression, signal transduction, and crystal structure to better understand the relationship between BMP9 and inflammation. In addition, we also briefly summarized the inflammatory characteristics of some TGF-β superfamily members to provide better insights and ideas for the study of BMP9 and inflammation.
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Affiliation(s)
- Tianzhu Song
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, PR China
- Key Laboratory of Oral Diseases of Gansu Province, Northwest Minzu University, Key Laboratory of Stomatology of State Ethnic Affairs Commission, Northwest Minzu University, Lanzhou, Gansu 730030, PR China
| | - Dingming Huang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, PR China
- Corresponding author.
| | - Dongzhe Song
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, PR China
- Corresponding author.
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6
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Function of Dental Follicle Progenitor/Stem Cells and Their Potential in Regenerative Medicine: From Mechanisms to Applications. Biomolecules 2021; 11:biom11070997. [PMID: 34356621 PMCID: PMC8301812 DOI: 10.3390/biom11070997] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 07/04/2021] [Accepted: 07/04/2021] [Indexed: 02/06/2023] Open
Abstract
Dental follicle progenitor/stem cells (DFPCs) are a group of dental mesenchyme stem cells that lie in the dental follicle and play a critical role in tooth development and maintaining function. Originating from neural crest, DFPCs harbor a multipotential differentiation capacity. More importantly, they have superiorities, including the easy accessibility and abundant sources, active self-renewal ability and noncontroversial sources compared with other stem cells, making them an attractive candidate in the field of tissue engineering. Recent advances highlight the excellent properties of DFPCs in regeneration of orofacial tissues, including alveolar bone repair, periodontium regeneration and bio-root complex formation. Furthermore, they play a unique role in maintaining a favorable microenvironment for stem cells, immunomodulation and nervous related tissue regeneration. This review is intended to summarize the current knowledge of DFPCs, including their stem cell properties, physiological functions and clinical application potential. A deep understanding of DFPCs can thus inspire novel perspectives in regenerative medicine in the future.
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Shoushrah SH, Transfeld JL, Tonk CH, Büchner D, Witzleben S, Sieber MA, Schulze M, Tobiasch E. Sinking Our Teeth in Getting Dental Stem Cells to Clinics for Bone Regeneration. Int J Mol Sci 2021; 22:6387. [PMID: 34203719 PMCID: PMC8232184 DOI: 10.3390/ijms22126387] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 05/27/2021] [Accepted: 06/02/2021] [Indexed: 12/12/2022] Open
Abstract
Dental stem cells have been isolated from the medical waste of various dental tissues. They have been characterized by numerous markers, which are evaluated herein and differentiated into multiple cell types. They can also be used to generate cell lines and iPSCs for long-term in vitro research. Methods for utilizing these stem cells including cellular systems such as organoids or cell sheets, cell-free systems such as exosomes, and scaffold-based approaches with and without drug release concepts are reported in this review and presented with new pictures for clarification. These in vitro applications can be deployed in disease modeling and subsequent pharmaceutical research and also pave the way for tissue regeneration. The main focus herein is on the potential of dental stem cells for hard tissue regeneration, especially bone, by evaluating their potential for osteogenesis and angiogenesis, and the regulation of these two processes by growth factors and environmental stimulators. Current in vitro and in vivo publications show numerous benefits of using dental stem cells for research purposes and hard tissue regeneration. However, only a few clinical trials currently exist. The goal of this review is to pinpoint this imbalance and encourage scientists to pick up this research and proceed one step further to translation.
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Affiliation(s)
| | | | | | | | | | | | | | - Edda Tobiasch
- Department of Natural Sciences, Bonn-Rhein-Sieg University of Applied Sciences, von-Liebig- Strasse. 20, 53359 Rheinbach, Germany; (S.H.S.); (J.L.T.); (C.H.T.); (D.B.); (S.W.); (M.A.S.); (M.S.)
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8
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Bertrand AA, Malapati SH, Yamaguchi DT, Lee JC. The Intersection of Mechanotransduction and Regenerative Osteogenic Materials. Adv Healthc Mater 2020; 9:e2000709. [PMID: 32940024 PMCID: PMC7864218 DOI: 10.1002/adhm.202000709] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 06/14/2020] [Indexed: 12/23/2022]
Abstract
Mechanical signals play a central role in cell fate determination and differentiation in both physiologic and pathologic circumstances. Such signals may be delivered using materials to generate discrete microenvironments for the purposes of tissue regeneration and have garnered increasing attention in recent years. Unlike the addition of progenitor cells or growth factors, delivery of a microenvironment is particularly attractive in that it may reduce the known untoward consequences of the former two strategies, such as excessive proliferation and potential malignant transformation. Additionally, the ability to spatially modulate the fabrication of materials allows for the creation of multiple microenvironments, particularly attractive for regenerating complex tissues. While many regenerative materials have been developed and tested for augmentation of specific cellular responses, the intersection between cell biology and material interactions have been difficult to dissect due to the complexity of both physical and chemical interactions. Specifically, modulating materials to target individual signaling pathways is an avenue of interdisciplinary research that may lead to a more effective method of optimizing regenerative materials. In this work, the aim is to summarize the major mechanotransduction pathways for osteogenic differentiation and to consolidate the known materials and material properties that activate such pathways.
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Affiliation(s)
- Anthony A. Bertrand
- Division of Plastic and Reconstructive Surgery, University of California Los Angeles David Geffen School of Medicine, Los Angeles, California
| | - Sri Harshini Malapati
- Division of Plastic and Reconstructive Surgery, University of California Los Angeles David Geffen School of Medicine, Los Angeles, California
| | - Dean T. Yamaguchi
- Division of Plastic and Reconstructive Surgery, University of California Los Angeles David Geffen School of Medicine, Los Angeles, California
- Research Service, Greater Los Angeles VA Healthcare System, Los Angeles, California
| | - Justine C. Lee
- Division of Plastic and Reconstructive Surgery, University of California Los Angeles David Geffen School of Medicine, Los Angeles, California
- Research Service, Greater Los Angeles VA Healthcare System, Los Angeles, California
- UCLA Molecular Biology Institute, Los Angeles, California
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9
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Li X, Ren G, Cai C, Yang X, Nie L, Jing X, Li C. TNF‑α regulates the osteogenic differentiation of bone morphogenetic factor 9 adenovirus‑transduced rat follicle stem cells via Wnt signaling. Mol Med Rep 2020; 22:3141-3150. [PMID: 32945435 PMCID: PMC7453510 DOI: 10.3892/mmr.2020.11439] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Accepted: 06/01/2020] [Indexed: 12/18/2022] Open
Abstract
Periodontitis is a chronic infectious disease that alters the cellular microenvironment and promotes bone absorption. Bone morphogenetic protein 9 (BMP9) serves an important role in proliferation and differentiation, and tumor necrosis factor‑alpha (TNF‑α) is an important contributor to bone resorption. The present study aimed to investigate the effect of osteogenic differentiation in the presence of BMP9 and TNF‑α in rat follicle stem cells (rDFCs). rDFCs were transfected with adenoviruses expressing BMP9 (AdBMP9) and the expression levels of important proteins [BMP9, β‑catenin, glycogen synthase kinase 3β (GSK3β), phosphorylated‑GSK3β, calcium/calmodulin dependent protein kinase II and nemo like kinase] were determined using western blotting. The effect of osteogenesis was analyzed using reverse transcription‑quantitative PCR, in addition to alkaline phosphatase, Alizarin Red S, and hematoxylin and eosin staining methods. The results of the present study revealed that TNF‑α activated the canonical Wnt signaling pathway and suppressed osteogenesis. High concentrations of Dickkopf 1 (DKK1) reduced the osteogenic differentiation of AdBMP9‑transduced rDFCs, whereas low concentrations of DKK1 promoted BMP9‑induced bone formation, which was discovered to partially act via the canonical and non‑canonical Wnt signaling pathways. In conclusion, the findings of the present study suggested that the enhanced promoting effect of BMP9 alongside the treatment with low concentrations of DKK1 may be useful for treating periodontitis bone absorption.
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Affiliation(s)
- Xinyue Li
- Department of Outpatients, Stomatological Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing 401147, P.R. China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Stomatological Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing 401147, P.R. China
- Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Stomatological Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing 401147, P.R. China
| | - Ge Ren
- Department of Outpatients, Stomatological Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing 401147, P.R. China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Stomatological Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing 401147, P.R. China
- Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Stomatological Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing 401147, P.R. China
| | - Changjun Cai
- Department of Outpatients, Stomatological Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing 401147, P.R. China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Stomatological Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing 401147, P.R. China
- Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Stomatological Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing 401147, P.R. China
| | - Xia Yang
- Department of Outpatients, Stomatological Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing 401147, P.R. China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Stomatological Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing 401147, P.R. China
- Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Stomatological Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing 401147, P.R. China
| | - Li Nie
- Department of Outpatients, Stomatological Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing 401147, P.R. China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Stomatological Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing 401147, P.R. China
- Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Stomatological Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing 401147, P.R. China
| | - Xueqin Jing
- Department of Outpatients, Stomatological Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing 401147, P.R. China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Stomatological Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing 401147, P.R. China
- Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Stomatological Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing 401147, P.R. China
| | - Conghua Li
- Department of Outpatients, Stomatological Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing 401147, P.R. China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Stomatological Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing 401147, P.R. China
- Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Stomatological Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing 401147, P.R. China
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Tang N, Rao S, Ying Y, Huang Y. New insights into BMP9 signaling in organ fibrosis. Eur J Pharmacol 2020; 882:173291. [DOI: 10.1016/j.ejphar.2020.173291] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 05/15/2020] [Accepted: 06/16/2020] [Indexed: 12/13/2022]
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11
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VPS4B mutation impairs the osteogenic differentiation of dental follicle cells derived from a patient with dentin dysplasia type I. Int J Oral Sci 2020; 12:22. [PMID: 32737282 PMCID: PMC7395790 DOI: 10.1038/s41368-020-00088-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 06/02/2020] [Accepted: 06/04/2020] [Indexed: 01/05/2023] Open
Abstract
A splicing mutation in VPS4B can cause dentin dysplasia type I (DD-I), a hereditary autosomal-dominant disorder characterized by rootless teeth, the etiology of which is genetically heterogeneous. In our study, dental follicle cells (DFCs) were isolated and cultured from a patient with DD-I and compared with those from an age-matched, healthy control. In a previous study, this DD-I patient was confirmed to have a loss-of-function splicing mutation in VPS4B (IVS7 + 46C > G). The results from this study showed that the isolated DFCs were vimentin-positive and CK14-negative, indicating that the isolated cells were derived from the mesenchyme. DFCs harboring the VPS4B mutation had a significantly higher proliferation rate from day 3 to day 8 than control DFCs, indicating that VPS4B is involved in cell proliferation. The cells were then replenished with osteogenic medium to investigate how the VPS4B mutation affected osteogenic differentiation. Induction of osteogenesis, detected by alizarin red and alkaline phosphatase staining in vitro, was decreased in the DFCs from the DD-I patient compared to the control DFCs. Furthermore, we also found that the VPS4B mutation in the DD-I patient downregulated the expression of osteoblast-related genes, such as ALP, BSP, OCN, RUNX2, and their encoded proteins. These outcomes confirmed that the DD-I-associated VPS4B mutation could decrease the capacity of DFCs to differentiate during the mineralization process and may also impair physiological root formation and bone remodeling. This might provide valuable insights and implications for exploring the pathological mechanisms underlying DD-I root development.
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12
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Therapeutic Functions of Stem Cells from Oral Cavity: An Update. Int J Mol Sci 2020; 21:ijms21124389. [PMID: 32575639 PMCID: PMC7352407 DOI: 10.3390/ijms21124389] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 06/14/2020] [Accepted: 06/17/2020] [Indexed: 12/11/2022] Open
Abstract
Adult stem cells have been developed as therapeutics for tissue regeneration and immune regulation due to their self-renewing, differentiating, and paracrine functions. Recently, a variety of adult stem cells from the oral cavity have been discovered, and these dental stem cells mostly exhibit the characteristics of mesenchymal stem cells (MSCs). Dental MSCs can be applied for the replacement of dental and oral tissues against various tissue-damaging conditions including dental caries, periodontitis, and oral cancers, as well as for systemic regulation of excessive inflammation in immune disorders, such as autoimmune diseases and hypersensitivity. Therefore, in this review, we summarized and updated the types of dental stem cells and their functions to exert therapeutic efficacy against diseases.
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13
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Jiang K, Teng GD, Chen YQ. MicroRNA-23 suppresses osteogenic differentiation of human bone marrow mesenchymal stem cells by targeting the MEF2C-mediated MAPK signaling pathway. J Gene Med 2020; 22:e3216. [PMID: 32410261 DOI: 10.1002/jgm.3216] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 04/21/2020] [Accepted: 04/21/2020] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND The present study aimed to determine the role and mechanism of miR-23 with respect to regulating the osteogenic differentiation of human bone marrow mesenchymal stem cells (hBMSCs). MATERIALS The expression of miR-23 and MEF2C was measured in osteoporosis (OP) patients and healthy controls by a quantitative reverse transcriptase-polymerase chain reaction (qRT-PCR). The correlation between miR-23 and MEF2C was determined by the Pearson correlation coefficient. Moreover, bioinformatic analysis was performed using public databases. Target gene function and potential pathways were further examined. Then, we used a miR-23 mimic or inhibitor to further explore the potential mechanism of miR-23. RESULTS miR-23 is found to be up-regulated and MEF2C is down-regulated in OP patients compared to healthy controls. miR-23 had a negative correlation with MEF2C (r = -0.937, p = 0.001). Bioinformatic analysis revealed that a total of 664 overlapping target genes were found in the TargetScan (http://www.targetscan.org), miRDB (http://mirdb.org) and miRanda (http://www.microrna.org/microrna/home.do) databases. Moreover, Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis indicated that miR-23 may regulate the mitogan-activated protein kinase (MAPK) signaling pathway. miR-23 is down-regulated and MEF2C is significantly up-regulated in the osteogenic differentiation of hBMSCs. MEF2C was significantly up-regulated in the osteogenic differentiation of hBMSCs. Overexpression of miR-23 significantly down-regulated alkaline phosphatase (ALP) activity and calcium deposition, whereas the miR-23 inhibitor had the opposite effects. Moreover, overexpression of miR-23 significantly decreased osteoblast-related markers (Runx2, Osx, ALP and OCN). Further experiments confirmed that MEF2C is a direct target of miR-23. Moreover, the miR-23 mimic enhanced the expression of p-p38 but had no effect on p-JNK. CONCLUSIONS miR-23 decreases the osteogenic differentiation of hBMSCs through the MEF2C/MAPK signaling pathway.
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Affiliation(s)
- Kai Jiang
- Hand Surgery, 971th Hospital of PLA, Qingdao, Shandong, China
| | - Guo-Dong Teng
- Hand Surgery, 971th Hospital of PLA, Qingdao, Shandong, China
| | - Yan-Qing Chen
- Hand Surgery, 971th Hospital of PLA, Qingdao, Shandong, China
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Tang J, Qing MF, Li M, Gao Z. Dexamethasone inhibits BMP7-induced osteogenic differentiation in rat dental follicle cells via the PI3K/AKT/GSK-3β/β-catenin pathway. Int J Med Sci 2020; 17:2663-2672. [PMID: 33162794 PMCID: PMC7645344 DOI: 10.7150/ijms.44231] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Accepted: 08/29/2020] [Indexed: 02/05/2023] Open
Abstract
Impacted third molars are commonly seen in teenagers and young adults and can cause considerable suffering. Preventing eruption of the third molars can reduce pain at the source. Our previous study has shown that dexamethasone (DEX) at a certain concentration can prevent the eruption of third molars without damaging alveolar bone in Sprague-Dawley (SD) rats, but the relevant molecular mechanisms need to be explored. This study aimed to explore the effects of high concentrations of DEX on osteogenic signaling pathways, including BMP/Smad and Wnt/β-catenin pathways, in rat dental follicle cells (rDFCs) and to elucidate the possible mechanisms. The results showed that BMP7 induced osteogenic differentiation by increasing the activity of ALP and the protein levels of OPN in rDFCs. DEX decreased endogenous BMP7 and phosphorylated Smad1/5/8 expression as well as BMP7-induced osteogenic differentiation. DEX also reduced the mRNA and protein levels of β-catenin by enhancing the expression of GSK-3β. In addition, regardless of DEX intervention, overexpression of BMP7 promoted the expression of β-catenin, while knockdown of BMP7 attenuated it. Further investigation revealed that overexpression of BMP7 attenuated the DEX-mediated inhibition of AKT and GSK-3β phosphorylation, but knockdown of BMP7 exerted the opposite effects. This study suggests that high concentrations of DEX may inhibit the expression of β-catenin via the PI3K/AKT/GSK-3β pathway in a manner mediated by BMP7. The findings further illustrate the possible molecular mechanisms by which DEX prevents tooth development.
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Affiliation(s)
- Jing Tang
- Department of Stomatology, The Second Affiliated Hospital of Chongqing Medical University, 76 Linjiang Road, Yuzhong District, Chongqing 400010, P.R. China.,Chongqing Key Laboratory of Oral Disease and Biomedical Sciences, 426 North Songshi Road, Yubei District, Chongqing 401147, P.R. China
| | - Mao-Feng Qing
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, No. 14, Sec. 3, Renminnan Road, 610041 Chengdu, Sichuan, P.R. China
| | - Min Li
- Department of Stomatology, The Second Affiliated Hospital of Chongqing Medical University, 76 Linjiang Road, Yuzhong District, Chongqing 400010, P.R. China.,Chongqing Key Laboratory of Oral Disease and Biomedical Sciences, 426 North Songshi Road, Yubei District, Chongqing 401147, P.R. China
| | - Zhi Gao
- Department of Stomatology, The Second Affiliated Hospital of Chongqing Medical University, 76 Linjiang Road, Yuzhong District, Chongqing 400010, P.R. China
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15
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Ma N, Teng X, Zheng Q, Chen P. The regulatory mechanism of p38/MAPK in the chondrogenic differentiation from bone marrow mesenchymal stem cells. J Orthop Surg Res 2019; 14:434. [PMID: 31831024 PMCID: PMC6909593 DOI: 10.1186/s13018-019-1505-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Accepted: 11/28/2019] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Osteoarthritis (OA) is a degenerative joint disease characterized by articular cartilage degradation and joint inflammation, in which growth factors are significantly involved. The extracellular signal-regulated p38 MAPK pathways play important roles in the regulation of osteogenic and chondrogenic differentiation in bone marrow mesenchymal stem cells (BMSCs). However, the exact mechanism remains unclear. METHODS In this study, the chondrogenic differentiation of human BMSCs was initiated in micromass culture in the presence of TGF-β1 for 14 days. Quantitative RT-PCR and Western blot were performed to detect the transfection effect of shRNA-p38 interfering plasmid in BMSCs. The protein expressions of p/t-p38, SOX9, collagen II, Aggrecan, p/t-Smad1, and p/t-Smad4, as well as the kinase activities of p38/ERK/JNK pathway, were investigated using Western blot analysis. Additionally, the level of chondroitin sulfate and glycosaminoglycans (GAG) expression were measured by Alcian blue staining and GAG assay kit via qualitative and quantitative methods, respectively. RESULTS The results demonstrated that p38 pathway was activated in the chondrogenic differentiation of BMSCs induced by TGF-β1. Cartilage-specific genes and chondrogenic regulators, such as SOX9, collagen II, Aggrecan, and GAG, were upregulated by TGF-β1, which could be reversed by predisposed with shRNA-p38 interfering plasmid and p38-MAPK inhibitors (SB203580). Moreover, the activation of p38/ERK/JNK pathways in the presence of TGF-β1 was suppressed by shRNA-p38 and SB203580 treatment. CONCLUSION Collectively, the activation of p38/ERK/JNK/Smad pathways plays a facilitated role in the chondrogenic differentiation induced by TGF-β1. After suppressing the p38 pathway, the chondrogenesis can be inhibited, which can be used to guide the treatment of osteoarthritis.
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Affiliation(s)
- Ning Ma
- Department of Orthopedics, Zhejiang Taizhou Central Hospital (Affiliated Hospital of Taizhou University), No. 999 Donghai Avenue, Jiaojiang District, Taizhou, 318000, Zhejiang, China
| | - Xiao Teng
- Department of Orthopedics, Zhejiang Taizhou Central Hospital (Affiliated Hospital of Taizhou University), No. 999 Donghai Avenue, Jiaojiang District, Taizhou, 318000, Zhejiang, China
| | - Qi Zheng
- Department of Orthopedics, Zhejiang Taizhou Central Hospital (Affiliated Hospital of Taizhou University), No. 999 Donghai Avenue, Jiaojiang District, Taizhou, 318000, Zhejiang, China
| | - Peng Chen
- Department of Orthopedics, Yan Cheng Third People's Hospital (Affiliated Yancheng Hospital of Southeast University Medical College), No.2 Xindu West Road, Yancheng, 224001, Jiangsu, China.
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16
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Li X, Chen D, Jing X, Li C. DKK1 and TNF-alpha influence osteogenic differentiation of adBMP9-infected-rDFCs. Oral Dis 2019; 26:360-369. [PMID: 31733158 DOI: 10.1111/odi.13235] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2019] [Revised: 10/12/2019] [Accepted: 10/28/2019] [Indexed: 12/18/2022]
Abstract
OBJECTIVES Rat dental follicle cells (rDFCs) function as precursor cells of periodontal tissues. Bone morphogenetic protein (BMP9) plays an important role in proliferation and differentiation. Tumour necrosis factor-alpha (TNF-alpha) is an important contributor to bone resorption. Wnt canonical pathway can be inhibited by Dickkopf 1 (DKK1). The aim of the study was to enhance the osteogenesis of BMP9 treated rDFCs in an inflammatory environment and elucidate the mechanism. MATERIALS AND METHODS rDFCs were infected by adenoviruses expressing BMP9 (adBMP9). Expression levels of proteins and genes were measured by Western blotting and qPCR. The effect on osteogenesis was evaluated by measuring the activity of alkaline phosphatase (ALP), observation of Alizarin Red S and haematoxylin and eosin staining. RESULTS TNF-alpha activated the canonical Wnt pathway and inhibited the non-canonical pathway. DKK1 suppressed the canonical pathway and promoted the non-canonical pathway. Addition of TNF-alpha or DKK1 inhibited BMP9/Smad pathway. However, this inhibition was reduced by the addition of DKK1 with TNF-alpha. CONCLUSIONS DKK1 reduces the inhibitory effects of TNF-alpha in adBMP9-infected-rDFCs, possibly through interaction with the Smad signalling pathway and Wnt pathways. These findings may lead to a novel approach for the treatment of periodontitis-related alveolar bone defects.
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Affiliation(s)
- Xinyue Li
- Stomatological Hospital of Chongqing Medical University, Chongqing, China.,Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing, China.,Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, China
| | - Dongcai Chen
- Stomatological Hospital of Chongqing Medical University, Chongqing, China.,Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing, China.,Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, China
| | - Xueqin Jing
- Stomatological Hospital of Chongqing Medical University, Chongqing, China.,Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing, China.,Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, China
| | - Conghua Li
- Stomatological Hospital of Chongqing Medical University, Chongqing, China.,Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing, China.,Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, China
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Farzin A, Hassan S, Ebrahimi-Barough S, Ai A, Hasanzadeh E, Goodarzi A, Ai J. A facile two step heat treatment strategy for development of bioceramic scaffolds for hard tissue engineering applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 105:110009. [DOI: 10.1016/j.msec.2019.110009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 06/12/2019] [Accepted: 07/20/2019] [Indexed: 10/26/2022]
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18
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Dental Follicle Cells: Roles in Development and Beyond. Stem Cells Int 2019; 2019:9159605. [PMID: 31636679 PMCID: PMC6766151 DOI: 10.1155/2019/9159605] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2019] [Accepted: 08/16/2019] [Indexed: 02/05/2023] Open
Abstract
Dental follicle cells (DFCs) are a group of mesenchymal progenitor cells surrounding the tooth germ, responsible for cementum, periodontal ligament, and alveolar bone formation in tooth development. Cascades of signaling pathways and transcriptional factors in DFCs are involved in directing tooth eruption and tooth root morphogenesis. Substantial researches have been made to decipher multiple aspects of DFCs, including multilineage differentiation, senescence, and immunomodulatory ability. DFCs were proved to be multipotent progenitors with decent amplification, immunosuppressed and acquisition ability. They are able to differentiate into osteoblasts/cementoblasts, adipocytes, neuron-like cells, and so forth. The excellent properties of DFCs facilitated clinical application, as exemplified by bone tissue engineering, tooth root regeneration, and periodontium regeneration. Except for the oral and maxillofacial regeneration, DFCs were also expected to be applied in other tissues such as spinal cord defects (SCD), cardiomyocyte destruction. This article reviewed roles of DFCs in tooth development, their properties, and clinical application potentials, thus providing a novel guidance for tissue engineering.
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19
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Ye F, Xu H, Yin H, Zhao X, Li D, Zhu Q, Wang Y. The role of BMP6 in the proliferation and differentiation of chicken cartilage cells. PLoS One 2019; 14:e0204384. [PMID: 31260450 PMCID: PMC6602178 DOI: 10.1371/journal.pone.0204384] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 05/28/2019] [Indexed: 11/18/2022] Open
Abstract
Previous studies have indicated that bone morphogenetic protein (BMP) 6 may play an important role in skeletal system development and progression. However, the mechanism underlying the effects of BMP6 in cartilage cell proliferation and differentiation remains unknown. In this study, cartilage cells were isolated from shanks of chicken embryos and treated with different concentrations of Growth Hormone. Cell proliferation potential was assessed using real-time polymerase chain reaction (RT-PCR), western blotting and CCK-8 assays in vitro. The results showed that at 48 h, the Collagen II and BMP6 expression levels in 50 ng/μl GH-treated cartilage cells were significantly higher than in groups treated with 100 ng/μl or 200 ng/μl GH. We further observed that knockdown of BMP6 in cartilage cells led to significantly decreased expression mRNAs and proteins of Collagen II and Collagen X. Moreover, the suppression of BMP6 expression by a specific siRNA led to significantly decreased expression mRNA levels of IGF1R, JAK2, PKC, PTH, IHH and PTHrP and decreased protein levels of PKC, IHH and PTHrP. Taken together, our data suggest that BMP6 may play a critical role in chicken cartilage cell proliferation and differentiation through the regulation of IGF1, JAK2, PKC, PTH, and IHH-PTHrP signaling pathways.
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Affiliation(s)
- Fei Ye
- Institute of Animal Genetics and Breeding, Sichuan Agricultural University, Chengdu, China
| | - Hengyong Xu
- Institute of Animal Genetics and Breeding, Sichuan Agricultural University, Chengdu, China
| | - Huadong Yin
- Institute of Animal Genetics and Breeding, Sichuan Agricultural University, Chengdu, China
| | - Xiaoling Zhao
- Institute of Animal Genetics and Breeding, Sichuan Agricultural University, Chengdu, China
| | - Diyan Li
- Institute of Animal Genetics and Breeding, Sichuan Agricultural University, Chengdu, China
| | - Qing Zhu
- Institute of Animal Genetics and Breeding, Sichuan Agricultural University, Chengdu, China
| | - Yan Wang
- Institute of Animal Genetics and Breeding, Sichuan Agricultural University, Chengdu, China
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20
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Piao J, Xu CL, Piao JA, Cao M, Huang N, Jin M. Expression analysis of proteasome maturation protein ( POMP) gene in Liaoning Cashmere goat. Anim Biotechnol 2019; 31:324-334. [PMID: 30957645 DOI: 10.1080/10495398.2019.1596946] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Liaoning Cashmere goat is a precious genetic resource of China. To explore the relationship between POMP and cashmere growth, we analyzed the expression of POMP. POMP encodes a hudrophilic protein which is most closely related to bos. RT-PCR showed that POMP was expressed in skin, heart, liver, spleen, lung, and kidney tissues. Real-time PCR showed that the expression of POMP was more active in the secondary hair follicles than the primary hair follicles in anagen. In situ hybridization showed that POMP was obviously expressed in the Inner Root Sheath (IRS) but no expression in Outer Root. The treatment of fibroblasts with melatonin (MT), fibroblast growth factors 5 (FGF5) and insulin-like growth factors 1 (IGF-1) showed that MT/FGF5/IGF-1 much performance for inhibiting the expression of POMP; MT + FGF5 inhibited the expression of POMP; MT + IGF-1 promoted the expression of POMP. When Noggin expression is decreased by siRNA, the expression of POMP is inhibited. To sum up, POMP strongly expressed in the root sheath of hair follicles, related to the development of the primary and secondary hair follicle; In addition, by adding MT/FGF5/IGF-1 or interfering with the Noggin expression to regulate the expression of POMP, to control the growth of Liaoning Cashmere goat cashmere.
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Affiliation(s)
- Jun Piao
- Faculty of Life Sciences, Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian, China
| | - Chun-Ling Xu
- Faculty of Life Sciences, Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian, China
| | - Jing-Ai Piao
- Faculty of Life Sciences, Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian, China
| | - Ming Cao
- Faculty of Life Sciences, Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian, China
| | - Nan Huang
- Chongqing Academy of Science and Technology, Chongqing, China
| | - Mei Jin
- Faculty of Life Sciences, Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian, China
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21
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Du Y, Li J, Hou Y, Chen C, Long W, Jiang H. Alteration of circular RNA expression in rat dental follicle cells during osteogenic differentiation. J Cell Biochem 2019; 120:13289-13301. [PMID: 30916823 DOI: 10.1002/jcb.28603] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 01/16/2019] [Accepted: 01/24/2019] [Indexed: 01/22/2023]
Abstract
Circular RNAs (circRNAs) are novel noncoding RNAs and play crucial roles in various biological processes. However, little is known about the functions of circRNAs in osteogenic differentiation. The current study aimed to investigate the differential expression of circRNAs in rat dental follicle cells (rDFCs) during osteogenic differentiation, identified by RNA high-throughput sequencing and quantitative real-time polymerase chain reaction. Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analyses were performed to further explore the biofunctions of circRNA biofunctions. Two hundred sixty-six differentially-expressed circRNAs that are involved in several important signaling pathways, including mitogen-activated protein kinases (MAPK) and transforming growth factor-β (TGF-β) signaling pathways were revealed. Among these, circFgfr2 and its predicted downstream targets, miR-133 and BMP6 (bone morphogenetic protein-6), were identified both in vivo and in vitro. For further validation, circFgfr2 was overexpressed in rDFCs, the results showed that the expression of miR-133 was downregulated and the expression of BMP6 was upregulated. Taken together, the results revealed the circRNA expression profiles and indicated the importance of circRNAs of rDFCs. In addition, circFgfr2 might promote osteogenesis by controlling miR-133/BMP6, which is a potential new target for the manipulation of tooth regeneration and bone formation.
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Affiliation(s)
- Yu Du
- Department of Operative Dentistry and Endodontics, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangdong Province Key Laboratory of Stomatology, Guangzhou, Guangdong, People's Republic of China
| | - Jing Li
- Department of Operative Dentistry and Endodontics, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangdong Province Key Laboratory of Stomatology, Guangzhou, Guangdong, People's Republic of China
| | - Yuluan Hou
- Department of Clinical Immunology, Sun Yat-sen University Third Affiliated Hospital, Guangzhou, China
| | - Chanchan Chen
- Department of Stomatology, Shenzhen Children's Hospital, Shenzhen, Guangdong, China
| | - Weilin Long
- Department of Operative Dentistry and Endodontics, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangdong Province Key Laboratory of Stomatology, Guangzhou, Guangdong, People's Republic of China
| | - Hongwei Jiang
- Department of Operative Dentistry and Endodontics, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangdong Province Key Laboratory of Stomatology, Guangzhou, Guangdong, People's Republic of China
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22
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Yang Y, Wang X, Miron RJ, Zhang X. The interactions of dendritic cells with osteoblasts on titanium surfaces: an in vitro investigation. Clin Oral Investig 2019; 23:4133-4143. [PMID: 30850859 DOI: 10.1007/s00784-019-02852-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 02/13/2019] [Indexed: 12/20/2022]
Abstract
OBJECTIVES Osteoimmune interactions possess a critical part in the integration of materials and hosts. Dendritic cells (DCs) are the most common members of osteoimmune cells family. The titanium surfaces of dental implants tend to promote a mature dendritic cell phenotype with increased proinflammatory secretion. However, very little is known to the effects of this microenvironment on the behaviors of cells around implants, especially osteoblasts, and how the tissue integrations take place on such biomaterial surfaces. Therefore, the present study was to investigate the interactions of DCs with osteoblasts on titanium surfaces. DCs seeded on PT and SLA titanium surfaces were compared by assays for the proliferations, surface markers, and inflammatory genes expressions. MATERIALS AND METHODS DCs seeded on PT and SLA titanium surfaces were compared by assays for the proliferations, surface markers, and inflammatory genes expressions. Next, we harvested the dendritic cell-conditioned medium (CM) and investigated the effects of CM on MC3T3-E1. RESULTS The results showed an increase in CD86 and proinflammatory expressions of DCs seeded on PT and SLA surfaces, as well as a decrease in anti-inflammatory cytokines. The CM from titanium surfaces inhibited the osteoblast differentiation with reduced expression of osteogenic genes RUNX2, COL1, ALP, and OCN and decreased ALP activity as well as Alizarin red staining. CONCLUSION These findings suggested that titanium surfaces switch DCs toward maturation phenotypes and thus inhibit the differentiation and mineralization of osteoblasts. CLINICAL RELEVANCE Knowing the significant impact of immune cells on osteogenesis behaviors, some efforts to decrease the immune reaction might be of clinical significance. Favorable immune environments can increase the dental implants survival rate in patients.
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Affiliation(s)
- Yang Yang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China.,Department of Oral Implantology, Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Sun Yat-Sen University, 510055, Guangzhou, People's Republic of China
| | - Xuzhu Wang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Richard J Miron
- Department of Periodontology, College of Dental Medicine, Nova Southeastern University, Fort Lauderdale, FL, 33328, USA
| | - Xiaoxin Zhang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China.
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Liu L, Wang D, Qin Y, Xu M, Zhou L, Xu W, Liu X, Ye L, Yue S, Zheng Q, Li D. Astragalin Promotes Osteoblastic Differentiation in MC3T3-E1 Cells and Bone Formation in vivo. Front Endocrinol (Lausanne) 2019; 10:228. [PMID: 31040823 PMCID: PMC6476984 DOI: 10.3389/fendo.2019.00228] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Accepted: 03/21/2019] [Indexed: 12/24/2022] Open
Abstract
Astragalin (AG) is a biologically active flavonoid compound that can be extracted from a number of medicinal plants. However, the effects of AG on osteoblastic differentiation in mouse MC3T3-E1 cells and on bone formation in vivo have not been studied fully. In this study, we found that the activities of alkaline phosphatase (ALP) and mineralized nodules in MC3T3-E1 cells were both significantly increased after treatment with AG (5, 10, and 20 μM). Meanwhile, the mRNA and protein levels of osteoblastic marker genes in MC3T3-E1 cells after AG treatment were markedly increased compared with a control group. In addition, the levels of BMP-2, p-Smad1/5/9, and Runx2 were significantly elevated in AG-treated MC3T3-E1 cells. Moreover, we found that the protein levels of Erk1/2, p-Erk1/2, p38, p-p38, and p-JNK were also significantly increased in AG-treated MC3T3-E1 cells compared to those in the control group. Finally, in vivo experiments demonstrated that AG significantly promoted bone formation in an ovariectomized (OVX)-induced osteoporotic mouse model. This was evidenced by significant increases in the values of osteoblast-related parameters (BFR/BS, MAR, Ob.S/BS, and Ob.N/B.Pm) and bone histomorphometric parameters (BMD, BV/TV, Tb.Th, and Tb.N.) in OVX mice after AG treatment (5, 10, and 20 mg/kg). Collectively, these results demonstrated that AG may promote osteoblastic differentiation in MC3T3-E1 cells via the activation of the BMP and MAPK pathways and promote bone formation in vivo. These novel findings indicated that AG may be a useful bone anabolic agent for the prevention and treatment of osteoporosis.
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Affiliation(s)
- Li Liu
- School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, China
- School of Pharmacy, Guangdong Medical University, Dongguan, China
| | - Dan Wang
- School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, China
| | - Yao Qin
- School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, China
| | - Maolei Xu
- School of Pharmacy, Binzhou Medical University, Yantai, China
| | - Ling Zhou
- School of Pharmacy, Binzhou Medical University, Yantai, China
| | - Wenjuan Xu
- School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, China
| | - Xiaona Liu
- School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, China
| | - Lei Ye
- School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, China
| | - Shijun Yue
- School of Pharmacy, Guangdong Medical University, Dongguan, China
| | - Qiusheng Zheng
- School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, China
- Key Laboratory of Xinjiang Endemic Phytomedicine Resources, Ministry of Education, School of Pharmacy, Shihezi University, Shihezi, China
| | - Defang Li
- School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, China
- *Correspondence: Defang Li
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Ercal P, Pekozer GG, Kose GT. Dental Stem Cells in Bone Tissue Engineering: Current Overview and Challenges. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1107:113-127. [PMID: 29498025 DOI: 10.1007/5584_2018_171] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The treatment of bone that is impaired due to disease, trauma or tumor resection creates a challenge for both clinicians and researchers. Critical size bone defects are conventionally treated with autografts which are associated with risks such as donor site morbidity and limitations like donor shortage. Bone tissue engineering has become a promising area for the management of critical size bone defects by the employment of biocompatible materials and the discovery of novel stem cell sources. Mesenchymal stem cells (MSCs) can be isolated with ease from various dental tissues including dental pulp stem cells, stem cells from apical papilla, dental follicle stem cells, stem cells from human exfoliated deciduous teeth, periodontal ligament stem cells, gingival stem cells and tooth germ derived stem cells. Outcomes of dental MSC mediated bone tissue engineering is explored in various in vivo and in vitro preclinical studies. However, there are still obscurities regarding the mechanisms underlying in MSC mediated bone regeneration and challenges in applications of dental stem cells. In this review, we summarized dental stem cell sources and their characterizations, along with currently used biomaterials for cell delivery and future perspectives for dental MSCs in the field of bone tissue engineering. Further efforts are necessary before moving to clinical trials for future applications.
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Jiang L, Tang Z. Expression and regulation of the ERK1/2 and p38 MAPK signaling pathways in periodontal tissue remodeling of orthodontic tooth movement. Mol Med Rep 2017; 17:1499-1506. [PMID: 29138812 PMCID: PMC5780090 DOI: 10.3892/mmr.2017.8021] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Accepted: 08/03/2017] [Indexed: 12/30/2022] Open
Abstract
The present study aimed to investigate the expression and regulation of extracellular signal-regulated kinase (ERK)1/2 and p38 mitogen-activated protein kinase (MAPK) signaling pathways in periodontal tissue remodeling of orthodontic tooth movement. Sprague Dawley rats with orthodontic tooth movement were generated. After tension stress for 1, 3, 5, 7 and 14 days, the protein and mRNA expression levels of ERK1/2 and p38 in periodontal tissue were determined by western blotting and reverse transcription-quantitative polymerase chain reaction (RT-qPCR), respectively. Primary human periodontal ligament cells (hPDLCs) were separated and characterized. Following exposure to centrifugal force for 1, 2, 6, 8 and 12 h, the protein expression levels of ERK1/2 and p38 MAPK, and the mRNA expression levels of ERK1/2, p38 and osteogenesis associated-genes [including alkaline phosphatase (ALP), osteopontin (OPN), collagen I (Col I), osteocalcin (OCN) and bone sialoprotein (BSP)] were measured. The protein expression levels of ERK1/2 and p38 MAPK in periodontal tissue and hPDLCs treated with stress were similar to those in the control groups. However, compared with the control, the phosphorylation and mRNA expression levels of the genes encoding ERK1/2 and p38 MAPK in orthodontic periodontal tissue and forced hPDLCs were elevated. These increases reached a peak at 5 days for orthodontic periodontal tissue and at 6 h for forced hPDLCs. In forced hPDLCs, the mRNA expression levels of ALP, OPN, Col I, OCN and BSP were notably and continuously upregulated in a time-dependent manner. In addition, hPDLCs were treated with the ERK1/2 inhibitor, PD098059, and the p38 MAPK inhibitor, SB203580, and the mRNA expression levels of the osteogenesis associated-genes were then measured using RT-qPCR. Following treatment with the ERK1/2 inhibitor and p38 MAPK inhibitor, the mRNA expression levels of ALP, OPN, Col I, OCN and BSP were significantly downregulated. In conclusion, ERK1/2 and p38 MAPK signaling pathways may be positively and closely associated with periodontal tissue remodeling of orthodontic tooth movement.
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Affiliation(s)
- Liping Jiang
- Department of Orthodontics, Affiliated Stomatological Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Zhen Tang
- Department of Orthodontics, Affiliated Stomatological Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
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Nie L, Yang X, Duan L, Huang E, Pengfei Z, Luo W, Zhang Y, Zeng X, Qiu Y, Cai T, Li C. The healing of alveolar bone defects with novel bio-implants composed of Ad-BMP9-transfected rDFCs and CHA scaffolds. Sci Rep 2017; 7:6373. [PMID: 28743897 PMCID: PMC5527078 DOI: 10.1038/s41598-017-06548-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 06/15/2017] [Indexed: 12/17/2022] Open
Abstract
Cells, scaffolds, and growth factors play important roles in bone regeneration. Bone morphogenetic protein 9 (BMP9), a member of BMP family, could facilitate osteogenesis by regulating growth factors and promoting angiogenesis. Similar to other stem cells, rat dental follicle stem cells (rDFCs), the precursor cells of cementoblasts, osteoblasts and periodontal ligament cells, can self-renew and exhibit multipotential capacity. Coralline hydroxyapatite (CHA) has good biocompatibility and conductivity required for bone tissue engineering. Here, we reported that BMP9 could enhance the osteogenic differentiation of rDFCs in cell culture. Moreover, our results suggested that BMP9 acted through the Smad1/5/8 signaling pathway. We also produced a novel scaffold that encompasses bio-degradable CHA seeded with recombinant adenoviruses expressing BMP9-transfected rDFCs (Ad-BMP9-transfected rDFCs). With this implant, we achieved more alveolar bone regeneration in the alveolar bone defect compared to blank group, CHA group and rDFCs group. Our results provided a novel bio-implants composed of Ad-BMP9-transfected rDFCs and CHA scaffolds and its mechanism is regarding the activation of Smad1/5/8 signaling pathway in BMP9-induced rDFCs osteogenesis.
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Affiliation(s)
- Li Nie
- Stomatological Hospital of Chongqing Medical University, Chongqing, 401147, China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing Municipal Key, Chongqing, 401147, China
- Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, 401147, China
| | - Xia Yang
- Stomatological Hospital of Chongqing Medical University, Chongqing, 401147, China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing Municipal Key, Chongqing, 401147, China
- Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, 401147, China
| | - Liang Duan
- Department of Laboratory Medicine, the Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400010, China
| | - Enyi Huang
- Stomatological Hospital of Chongqing Medical University, Chongqing, 401147, China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing Municipal Key, Chongqing, 401147, China
- Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, 401147, China
| | - Zhou Pengfei
- Stomatological Hospital of Chongqing Medical University, Chongqing, 401147, China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing Municipal Key, Chongqing, 401147, China
- Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, 401147, China
| | - Wenping Luo
- Stomatological Hospital of Chongqing Medical University, Chongqing, 401147, China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing Municipal Key, Chongqing, 401147, China
- Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, 401147, China
| | - Yan Zhang
- Stomatological Hospital of Chongqing Medical University, Chongqing, 401147, China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing Municipal Key, Chongqing, 401147, China
- Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, 401147, China
| | - Xingqi Zeng
- Stomatological Hospital of Chongqing Medical University, Chongqing, 401147, China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing Municipal Key, Chongqing, 401147, China
- Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, 401147, China
| | - Ye Qiu
- Stomatological Hospital of Chongqing Medical University, Chongqing, 401147, China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing Municipal Key, Chongqing, 401147, China
- Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, 401147, China
| | - Ting Cai
- Stomatological Hospital of Chongqing Medical University, Chongqing, 401147, China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing Municipal Key, Chongqing, 401147, China
- Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, 401147, China
| | - Conghua Li
- Stomatological Hospital of Chongqing Medical University, Chongqing, 401147, China.
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing Municipal Key, Chongqing, 401147, China.
- Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, 401147, China.
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Ba P, Duan X, Fu G, Lv S, Yang P, Sun Q. Differential effects of p38 and Erk1/2 on the chondrogenic and osteogenic differentiation of dental pulp stem cells. Mol Med Rep 2017; 16:63-68. [PMID: 28498451 PMCID: PMC5482129 DOI: 10.3892/mmr.2017.6563] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Accepted: 02/14/2017] [Indexed: 12/18/2022] Open
Abstract
The extracellular signal-regulated protein kinase 1/2 (Erk1/2) and p38 mitogen-activated protein-kinase pathways serve important roles in the regulation of osteogenic and chondrogenic differentiation in mesenchymal stem cells (MSCs). However, the exact mechanism remains unclear, and the effect is controversial. In the present study, the effects of Erk1/2 and p38 on the osteogenic and chondrogenic differentiation of dental pulp stem cells (DPSCs) were compared in vitro. The results indicated that inhibition of Erk1/2 is able to enhance the osteogenic differentiation of DPSCs and inhibit chondrogenic differentiation, whereas inhibition of p38 demonstrated the opposite effect. When compared with previous studies, the present study further confirmed that Erk1/2 and p38 serve important, but complicated, roles in regulating the differentiation of MSCs. Different chemical and physical stimuli, cell types, culture methods, times of inhibitor administration and the dosage of the inhibitor may influence the effect of Erk1/2 and p38 on the differentiation of MSCs. The present study aims to better understand the mechanisms that control the differentiation of MSCs and may be helpful in creating more effective tissue regeneration.
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Affiliation(s)
- Pengfei Ba
- Department of Periodontology, School of Stomatology, Shandong University, Jinan, Shandong 250012, P.R. China
| | - Xiaoyu Duan
- National Engineering Laboratory, WeGo Group Co., Ltd., Weihai, Shandong 264210, P.R. China
| | - Guo Fu
- Department of Periodontology, Weihai Stomatological Hospital, Weihai, Shandong 264200, P.R. China
| | - Shuyan Lv
- Department of Periodontology, Weihai Stomatological Hospital, Weihai, Shandong 264200, P.R. China
| | - Pishan Yang
- Department of Periodontology, School of Stomatology, Shandong University, Jinan, Shandong 250012, P.R. China
| | - Qinfeng Sun
- Department of Periodontology, School of Stomatology, Shandong University, Jinan, Shandong 250012, P.R. China
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Yao S, Li C, Beckley M, Liu D. Expression of odontogenic ameloblast-associated protein in the dental follicle and its role in osteogenic differentiation of dental follicle stem cells. Arch Oral Biol 2017; 78:6-12. [PMID: 28189884 DOI: 10.1016/j.archoralbio.2017.02.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Revised: 01/02/2017] [Accepted: 02/03/2017] [Indexed: 02/04/2023]
Abstract
OBJECTIVE Odontogenic Ameloblast-Associated Protein (ODAM) is encoded by a secretory calcium-binding phosphoprotein cluster gene, which generally plays an important role for mineralization. Dental follicle (DF) is essential in regulating bone formation for tooth eruption. This study aims to reveal ODAM expression in the DFs of developing and erupting molars, and to determine the possible role of ODAM. DESIGN DFs were collected from human third molars and rat mandibular molars for gene expression assessment and for establishment of cell cultures. RT-PCR and western blot were conducted to determine ODAM expression. Over- or silencing expression of ODAM in the dental follicle stem cells (DFSCs) was done by transfecting the cells with ODAM plasmid or siRNA to evaluate ODAM effects on osteogenesis. RESULTS Rat DFs weakly expressed ODAM at early-postnatal days, but a chronological increment of ODAM expression from days 1 to 11 was observed. Differences in expression of ODAM were seen in the human DFs of different individuals. In vitro, ODAM was expressed in DFSCs, but almost no expression in DF-derived fibroblast-like cells. Forcing the DFSCs to overexpress ODAM accelerated osteogenesis, whereas continuously silencing the ODAM in the DFSCs reduced osteogenesis only at 2 weeks of osteogenic induction. CONCLUSIONS ODAM is differentially expressed in the DFs of different age molars. Its expression is coincident with the increased bone formation of tooth crypt during tooth eruption in rat DFs. Increase of ODAM expression may accelerate osteogenic differentiation of DFSCs. Thus, ODAM expression in the DF may regulate bone formation for timely tooth eruption.
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Affiliation(s)
- Shaomian Yao
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA, United States.
| | - Chunhong Li
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA, United States
| | - Michael Beckley
- Department of Oral and Maxillofacial Surgery, University of the Pacific, Arthur A. Dugoni School of Dentistry, San Francisco, CA, United States
| | - Dawen Liu
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA, United States
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Bone Morphogenetic Protein-9 Enhances Osteogenic Differentiation of Human Periodontal Ligament Stem Cells via the JNK Pathway. PLoS One 2017; 12:e0169123. [PMID: 28052093 PMCID: PMC5214565 DOI: 10.1371/journal.pone.0169123] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2016] [Accepted: 12/12/2016] [Indexed: 01/09/2023] Open
Abstract
Bone morphogenetic protein-9 (BMP9) shows great osteoinductive potential in bone regeneration. Periodontal ligament stem cells (PDLSCs) with multi-differentiation capability and low immunogenicity are increasingly used as seed cells for periodontal regenerative therapies. In the present study, we investigated the potent osteogenic activity of BMP9 on human PDLSCs (hPDLSCs), in which the c-Jun N-terminal kinase (JNK) pathway is possibly involved. Our results showed that JNK inhibition by the specific inhibitor SP600125 or adenovirus expressing small interfering RNA (siRNA) targeting JNK (AdR-si-JNK) significantly decreased BMP9-induced gene and protein expression of early and late osteogenic markers, such as runt-related transcription factor 2 (Runx2), alkaline phosphatase (ALP), osteopontin (OPN), and osteocalcin (OCN), in hPDLSCs. We also confirmed the in-vivo positive effect of JNKs on ectopic bone formation induced by hPDLSCs injected into the musculature of athymic nude mice and BMP9 ex vivo gene delivery. For the cellular mechanism, we found that BMP9 activated the phosphorylation of JNKs and Smad2/3, and that JNKs may engage in cross-talk with the Smad2/3 pathway in BMP9-mediated osteogenesis.
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Wang L, Hu H, Cheng Y, Chen J, Bao C, Zou S, Wu G. Screening the Expression Changes in MicroRNAs and Their Target Genes in Mature Cementoblasts Stimulated with Cyclic Tensile Stress. Int J Mol Sci 2016; 17:ijms17122024. [PMID: 27941605 PMCID: PMC5187824 DOI: 10.3390/ijms17122024] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Revised: 11/22/2016] [Accepted: 11/24/2016] [Indexed: 02/05/2023] Open
Abstract
Cementum is a thin layer of cementoblast-produced mineralized tissue covering the root surfaces of teeth. Mechanical forces, which are produced during masticatory activity, play a paramount role in stimulating cementoblastogenesis, which thereby facilitates the maintenance, remodeling and integrity of cementum. However, hitherto, the extent to which a post-transcriptional modulation mechanism is involved in this process has rarely been reported. In this study, a mature murine cementoblast cell line OCCM-30 cells (immortalized osteocalcin positive cementoblasts) was cultured and subjected to cyclic tensile stress (0.5 Hz, 2000 µstrain). We showed that the cyclic tensile stress could not only rearrange the cell alignment, but also influence the proliferation in an S-shaped manner. Furthermore, cyclic tensile stress could significantly promote cementoblastogenesis-related genes, proteins and mineralized nodules. From the miRNA array analyses, we found that 60 and 103 miRNAs were significantly altered 6 and 18 h after the stimulation using cyclic tensile stress, respectively. Based on a literature review and bioinformatics analyses, we found that miR-146b-5p and its target gene Smad4 play an important role in this procedure. The upregulation of miR-146b-5p and downregulation of Smad4 induced by the tensile stress were further confirmed by qRT-PCR. The direct binding of miR-146b-5p to the three prime untranslated region (3' UTR) of Smad4 was established using a dual-luciferase reporter assay. Taken together, these results suggest an important involvement of miR-146b-5p and its target gene Smad4 in the cementoblastogenesis of mature cementoblasts.
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Affiliation(s)
- Liao Wang
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, No. 14, 3rd Section, South Renmin Road, Chengdu 610041, China.
| | - Haikun Hu
- China Dental Implantology Center, West China Dental Implantology Hospital, Sichuan University, No. 75 Xiaotianzhu Street, Chengdu 610041, China.
| | - Ye Cheng
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, No. 14, 3rd Section, South Renmin Road, Chengdu 610041, China.
| | - Jianwei Chen
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, No. 14, 3rd Section, South Renmin Road, Chengdu 610041, China.
| | - Chongyun Bao
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, No. 14, 3rd Section, South Renmin Road, Chengdu 610041, China.
| | - Shujuan Zou
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, No. 14, 3rd Section, South Renmin Road, Chengdu 610041, China.
| | - Gang Wu
- Department of Oral Implantology and Prosthetic Dentistry, Academic Centre for Dentistry Amsterdam (ACTA), VU University Amsterdam and University of Amsterdam, MOVE Research Institute, Gustav Mahlerlaan 3004, 1081LA Amsterdam, The Netherlands.
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31
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Wang T, Wang P, Cao Z, Wang X, Wang D, Shen Y, Jing D, Luo E, Tang W. Effects of BMP9 and pulsed electromagnetic fields on the proliferation and osteogenic differentiation of human periodontal ligament stem cells. Bioelectromagnetics 2016; 38:63-77. [PMID: 27859405 DOI: 10.1002/bem.22018] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Accepted: 10/19/2016] [Indexed: 12/30/2022]
Affiliation(s)
- Tingting Wang
- Department of Stomatology; Changhai Hospital; Second Military Medical University; Shanghai China
| | - Pei Wang
- Department of Stomatology; Changhai Hospital; Second Military Medical University; Shanghai China
| | - Zhizhong Cao
- Department of Stomatology; Changhai Hospital; Second Military Medical University; Shanghai China
| | - Xingxing Wang
- Department of Stomatology; Changhai Hospital; Second Military Medical University; Shanghai China
| | - Dalin Wang
- Department of Stomatology; Changhai Hospital; Second Military Medical University; Shanghai China
| | - Yaxian Shen
- Department of Stomatology; Changhai Hospital; Second Military Medical University; Shanghai China
| | - Da Jing
- Department of Biomedical Engineering; Fourth Military Medical University; Xi'an China
| | - Erping Luo
- Department of Biomedical Engineering; Fourth Military Medical University; Xi'an China
| | - Weizhong Tang
- Department of Stomatology; Changhai Hospital; Second Military Medical University; Shanghai China
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Sakisaka Y, Kanaya S, Nakamura T, Tamura M, Shimauchi H, Nemoto E. p38 MAP kinase is required for Wnt3a-mediated osterix expression independently of Wnt-LRP5/6-GSK3β signaling axis in dental follicle cells. Biochem Biophys Res Commun 2016; 478:527-32. [PMID: 27450807 DOI: 10.1016/j.bbrc.2016.07.076] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Accepted: 07/18/2016] [Indexed: 11/24/2022]
Abstract
Wnt3a is a secreted glycoprotein that activates the glycogen synthase kinase-3β (GSK3β)/β-catenin signaling pathway through low-density-lipoprotein receptor-related protein (LRP)5/6 co-receptors. Wnt3a has been implicated in periodontal development and homeostasis, as well as in cementum formation. Recently, we have reported that Wnt3a increases alkaline phosphatase expression through the induction of osterix (Osx) expression in dental follicle cells, a precursor of cementoblasts. However, the molecular mechanism by which Wnt3a induces Osx expression is still unknown. In this study, we show that Wnt3a-induced Osx expression was inhibited in the presence of p38 mitogen-activated protein kinase (MAPK) inhibitors (SB203580 and SB202190) at gene and protein levels, as assessed by real-time PCR and immunocytohistochemistry, respectively. Pretreatment of cells with Dickkopf-1, a potent canonical Wnt antagonist binding to LRP5/6 co-receptors, did not influence Wnt3a-mediated p38 MAPK phosphorylation, suggesting that Wnt3a activates p38 MAPK through LRP5/6-independent signaling. On the other hand, pretreatment with p38 MAPK inhibitors had no effects on the phosphorylated status of GSK3β and β-catenin as well as β-catenin nuclear translocation, but inhibited Wnt3a-mediated β-catenin transcriptional activity. These findings suggest that p38 MAPK modulates canonical Wnt signaling at the β-catenin transcriptional level without any crosstalk with the Wnt3a-mediated LRP5/6-GSK3β signaling axis and subsequent β-catenin nuclear translocation. These findings expand our knowledge of the mechanisms controlling periodontal development and regeneration.
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Affiliation(s)
- Yukihiko Sakisaka
- Department of Periodontology and Endodontology, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Sousuke Kanaya
- Department of Periodontology and Endodontology, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; Liason Center for Innovative Dentistry, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Takashi Nakamura
- Department of Dental Pharmacology, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Masato Tamura
- Department of Biochemistry and Molecular Biology, Hokkaido University Graduate School of Dentistry, Sapporo 060-8586, Japan
| | - Hidetoshi Shimauchi
- Department of Periodontology and Endodontology, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Eiji Nemoto
- Department of Periodontology and Endodontology, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan.
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Ren X, Weisgerber DW, Bischoff D, Lewis MS, Reid RR, He TC, Yamaguchi DT, Miller TA, Harley BA, Lee JC. Nanoparticulate Mineralized Collagen Scaffolds and BMP-9 Induce a Long-Term Bone Cartilage Construct in Human Mesenchymal Stem Cells. Adv Healthc Mater 2016; 5:1821-30. [PMID: 27275929 PMCID: PMC5404742 DOI: 10.1002/adhm.201600187] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Revised: 04/21/2016] [Indexed: 12/29/2022]
Abstract
Engineering the osteochondral junction requires fabrication of a microenvironment that supports both osteogenesis and chondrogenesis. Multiphasic scaffold strategies utilizing a combination of soluble factors and extracellular matrix components are ideally suited for such applications. In this work, the contribution of an osteogenic nanoparticulate mineralized glycosaminoglycan scaffold (MC-GAG) and a dually chondrogenic and osteogenic growth factor, BMP-9, in the differentiation of primary human mesenchymal stem cells (hMSCs) is evaluated. Although 2D cultures demonstrate alkaline phosphatase activity and mineralization of hMSCs induced by BMP-9, MC-GAG scaffolds do not demonstrate significant differences in the collagen I expression, osteopontin expression, or mineralization. Instead, BMP-9 increases expression of collagen II, Sox9, aggrecan (ACAN), and cartilage oligomeric protein. However, the hypertrophic chondrocyte marker, collagen X, is not elevated with BMP-9 treatment. In addition, histologic analyses demonstrate that while BMP-9 does not increase mineralization, BMP-9 treatment results in an increase of sulfated glycosaminoglycans. Thus, the combination of BMP-9 and MC-GAG stimulates chondrocytic and osteogenic differentiation of hMSCs.
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Affiliation(s)
- Xiaoyan Ren
- Division of Plastic and Reconstructive Surgery, UCLA David Geffen School of Medicine, Los Angeles, CA 90095
- Research Service, Greater Los Angeles VA Healthcare System, Los Angeles, CA 90073
| | - Daniel W. Weisgerber
- Department of Chemical and Biomolecular Engineering, Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801
| | - David Bischoff
- Research Service, Greater Los Angeles VA Healthcare System, Los Angeles, CA 90073
| | - Michael S. Lewis
- Department of Pathology, Greater Los Angeles VA Healthcare System, Los Angeles, CA 90073
| | - Russell R. Reid
- Section of Plastic and Reconstructive Surgery, University of Chicago, IL 60637
| | - Tong-chuan He
- Department of Orthopaedic Surgery, University of Chicago, Chicago, IL 60637
| | - Dean T. Yamaguchi
- Research Service, Greater Los Angeles VA Healthcare System, Los Angeles, CA 90073
| | - Timothy A. Miller
- Division of Plastic and Reconstructive Surgery, UCLA David Geffen School of Medicine, Los Angeles, CA 90095
- Research Service, Greater Los Angeles VA Healthcare System, Los Angeles, CA 90073
| | - Brendan A.C. Harley
- Department of Chemical and Biomolecular Engineering, Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801
| | - Justine C. Lee
- Division of Plastic and Reconstructive Surgery, UCLA David Geffen School of Medicine, Los Angeles, CA 90095
- Research Service, Greater Los Angeles VA Healthcare System, Los Angeles, CA 90073
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Shiyan H, Nanquan R, Shuhao X, Xiaobing L. [Research progress on the cellular and molecular mechanisms of tooth eruption]. HUA XI KOU QIANG YI XUE ZA ZHI = HUAXI KOUQIANG YIXUE ZAZHI = WEST CHINA JOURNAL OF STOMATOLOGY 2016; 34:317-321. [PMID: 27526461 PMCID: PMC7030846 DOI: 10.7518/hxkq.2016.03.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Revised: 03/20/2016] [Indexed: 06/06/2023]
Abstract
Tooth eruption is a series of complicated physiological processes occurring once the crown is formed completely, as well as when the tooth moves toward the occasion plane. As such, the tooth moves through the alveolar bone and the oral mucosa until it finally reaches its functional position. Most studies indicate that the process of tooth eruption involves the alveolar bone, dental follicles, osteoclasts, osteoblasts, and multiple cytokines. Dental follicles regulate both resorption and formation of the alveolar bone, which is required for tooth eruption. Furthermore, root formation with periodontal ligament facilitates continuous tooth eruption. However, the exact mechanism underlying tooth eruption remains unclear. Hence, this review describes the recent research progress on the cellular and molecular mechanisms of tooth eruption.
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35
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Nanoparticulate mineralized collagen scaffolds induce in vivo bone regeneration independent of progenitor cell loading or exogenous growth factor stimulation. Biomaterials 2016; 89:67-78. [PMID: 26950166 DOI: 10.1016/j.biomaterials.2016.02.020] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Revised: 02/10/2016] [Accepted: 02/16/2016] [Indexed: 12/16/2022]
Abstract
Current strategies for skeletal regeneration often require co-delivery of scaffold technologies, growth factors, and cellular material. However, isolation and expansion of stem cells can be time consuming, costly, and requires an additional procedure for harvest. Further, the introduction of supraphysiologic doses of growth factors may result in untoward clinical side effects, warranting pursuit of alternative methods for stimulating osteogenesis. In this work, we describe a nanoparticulate mineralized collagen glycosaminoglycan scaffold that induces healing of critical-sized rabbit cranial defects without addition of expanded stem cells or exogenous growth factors. We demonstrate that the mechanism of osteogenic induction corresponds to an increase in canonical BMP receptor signalling secondary to autogenous production of BMP-2 and -9 early and BMP-4 later during differentiation. Thus, nanoparticulate mineralized collagen glycosaminoglycan scaffolds may provide a novel growth factor-free and ex vivo progenitor cell culture-free implantable method for bone regeneration.
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Sánchez-Duffhues G, Hiepen C, Knaus P, Ten Dijke P. Bone morphogenetic protein signaling in bone homeostasis. Bone 2015; 80:43-59. [PMID: 26051467 DOI: 10.1016/j.bone.2015.05.025] [Citation(s) in RCA: 125] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Revised: 04/11/2015] [Accepted: 05/20/2015] [Indexed: 01/06/2023]
Abstract
Bone morphogenetic proteins (BMPs) are cytokines belonging to the transforming growth factor-β (TGF-β) superfamily. They play multiple functions during development and tissue homeostasis, including regulation of the bone homeostasis. The BMP signaling pathway consists in a well-orchestrated manner of ligands, membrane receptors, co-receptors and intracellular mediators, that regulate the expression of genes controlling the normal functioning of the bone tissues. Interestingly, BMP signaling perturbation is associated to a variety of low and high bone mass diseases, including osteoporosis, bone fracture disorders and heterotopic ossification. Consistent with these findings, in vitro and in vivo studies have shown that BMPs have potent effects on the activity of cells regulating bone function, suggesting that manipulation of the BMP signaling pathway may be employed as a therapeutic approach to treat bone diseases. Here we review the recent advances on BMP signaling and bone homeostasis, and how this knowledge may be used towards improved diagnosis and development of novel treatment modalities. This article is part of a Special Issue entitled "Muscle Bone Interactions".
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Affiliation(s)
- Gonzalo Sánchez-Duffhues
- Department of Molecular Cell Biology and Cancer Genomics Centre Netherlands, Leiden University Medical Center, The Netherlands
| | - Christian Hiepen
- Institute for Chemistry and Biochemistry, Freie Universität Berlin, Berlin, Germany; Berlin Brandenburg School of Regenerative Therapies (BSRT), Charité Universitätsmedizin, Berlin, Germany
| | - Petra Knaus
- Institute for Chemistry and Biochemistry, Freie Universität Berlin, Berlin, Germany; Berlin Brandenburg School of Regenerative Therapies (BSRT), Charité Universitätsmedizin, Berlin, Germany.
| | - Peter Ten Dijke
- Department of Molecular Cell Biology and Cancer Genomics Centre Netherlands, Leiden University Medical Center, The Netherlands.
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García-Álvaro M, Addante A, Roncero C, Fernández M, Fabregat I, Sánchez A, Herrera B. BMP9-Induced Survival Effect in Liver Tumor Cells Requires p38MAPK Activation. Int J Mol Sci 2015; 16:20431-48. [PMID: 26343646 PMCID: PMC4613212 DOI: 10.3390/ijms160920431] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Revised: 07/31/2015] [Accepted: 08/18/2015] [Indexed: 12/22/2022] Open
Abstract
The study of bone morphogenetic proteins (BMPs) role in tumorigenic processes, and specifically in the liver, has gathered importance in the last few years. Previous studies have shown that BMP9 is overexpressed in about 40% of hepatocellular carcinoma (HCC) patients. In vitro data have also shown evidence that BMP9 has a pro-tumorigenic action, not only by inducing epithelial to mesenchymal transition (EMT) and migration, but also by promoting proliferation and survival in liver cancer cells. However, the precise mechanisms driving these effects have not yet been established. In the present work, we deepened our studies into the intracellular mechanisms implicated in the BMP9 proliferative and pro-survival effect on liver tumor cells. In HepG2 cells, BMP9 induces both Smad and non-Smad signaling cascades, specifically PI3K/AKT and p38MAPK. However, only the p38MAPK pathway contributes to the BMP9 growth-promoting effect on these cells. Using genetic and pharmacological approaches, we demonstrate that p38MAPK activation, although dispensable for the BMP9 proliferative activity, is required for the BMP9 protective effect on serum withdrawal-induced apoptosis. These findings contribute to a better understanding of the signaling pathways involved in the BMP9 pro-tumorigenic role in liver tumor cells.
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Affiliation(s)
- María García-Álvaro
- Department of Biochemistry and Molecular Biology II, Faculty of Pharmacy, Complutense University of Madrid. San Carlos Clinical Hospital Health Research Institute (IdISSC), Plaza Ramón y Cajal S/N, Madrid 28040, Spain.
| | - Annalisa Addante
- Department of Biochemistry and Molecular Biology II, Faculty of Pharmacy, Complutense University of Madrid. San Carlos Clinical Hospital Health Research Institute (IdISSC), Plaza Ramón y Cajal S/N, Madrid 28040, Spain.
| | - Cesáreo Roncero
- Department of Biochemistry and Molecular Biology II, Faculty of Pharmacy, Complutense University of Madrid. San Carlos Clinical Hospital Health Research Institute (IdISSC), Plaza Ramón y Cajal S/N, Madrid 28040, Spain.
| | - Margarita Fernández
- Department of Biochemistry and Molecular Biology II, Faculty of Pharmacy, Complutense University of Madrid. San Carlos Clinical Hospital Health Research Institute (IdISSC), Plaza Ramón y Cajal S/N, Madrid 28040, Spain.
| | - Isabel Fabregat
- Bellvitge Biomedical Research Institute (IDIBELL) and University of Barcelona (UB), L'Hospitalet de Llobregat, Barcelona 08908, Spain.
| | - Aránzazu Sánchez
- Department of Biochemistry and Molecular Biology II, Faculty of Pharmacy, Complutense University of Madrid. San Carlos Clinical Hospital Health Research Institute (IdISSC), Plaza Ramón y Cajal S/N, Madrid 28040, Spain.
| | - Blanca Herrera
- Department of Biochemistry and Molecular Biology II, Faculty of Pharmacy, Complutense University of Madrid. San Carlos Clinical Hospital Health Research Institute (IdISSC), Plaza Ramón y Cajal S/N, Madrid 28040, Spain.
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Osteogenic Potential of Dental Mesenchymal Stem Cells in Preclinical Studies: A Systematic Review Using Modified ARRIVE and CONSORT Guidelines. Stem Cells Int 2015; 2015:378368. [PMID: 26106427 PMCID: PMC4464683 DOI: 10.1155/2015/378368] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2014] [Accepted: 02/01/2015] [Indexed: 12/22/2022] Open
Abstract
Background and Objective. Dental stem cell-based tissue engineered constructs are emerging as a promising alternative to autologous bone transfer for treating bone defects. The purpose of this review is to systematically assess the preclinical in vivo and in vitro studies which have evaluated the efficacy of dental stem cells on bone regeneration. Methods. A literature search was conducted in Ovid Medline, Embase, PubMed, and Web of Science up to October 2014. Implantation of dental stem cells in animal models for evaluating bone regeneration and/or in vitro studies demonstrating osteogenic potential of dental stem cells were included. The preferred reporting items for systematic reviews and meta-analyses (PRISMA) guidelines were used to ensure the quality of the search. Modified ARRIVE (Animal research: reporting in invivo experiments) and CONSORT (Consolidated reporting of trials) were used to critically analyze the selected studies. Results. From 1914 citations, 207 full-text articles were screened and 137 studies were included in this review. Because of the heterogeneity observed in the studies selected, meta-analysis was not possible. Conclusion. Both in vivo and in vitro studies indicate the potential use of dental stem cells in bone regeneration. However well-designed randomized animal trials are needed before moving into clinical trials.
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Wang Z, Ma F, Wang J, Zhou Z, Liu B, He X, Fu L, He W, Cooper PR. Extracellular Signal-regulated Kinase Mitogen-activated Protein Kinase and Phosphatidylinositol 3-Kinase/Akt Signaling Are Required for Lipopolysaccharide-mediated Mineralization in Murine Odontoblast-like Cells. J Endod 2015; 41:871-6. [PMID: 25720983 DOI: 10.1016/j.joen.2015.01.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Accepted: 01/06/2015] [Indexed: 01/04/2023]
Abstract
INTRODUCTION Odontoblasts play an important role in post-developmental control of mineralization in response to external stimuli in the tooth. The present study investigated whether lipopolysaccharide (LPS), a major bacterial cell wall component, influenced mineralization in a murine odontoblast-like cell (OLC) line and the related intracellular signaling pathways involved. METHODS Alizarin red S staining was used to assess mineralized nodule formation in OLCs in response to LPS. The effects of LPS on gene expression of odontoblastic markers were investigated by using quantitative real-time reverse-transcriptase polymerase chain reaction. The potential involvement of toll-like receptor 4 (TLR4), nuclear factor kappa B (NF-κB), mitogen-activated protein kinase (MAPK), or phosphatidylinositol 3-kinase (PI3K)/Akt signaling pathways in the mineralized nodule formation, and mRNA expression of several odontoblastic markers of OLCs induced by LPS was assessed by using alizarin red S staining and quantitative real-time reverse-transcriptase polymerase chain reaction. Moreover, LPS stimulation resulted in phosphorylation of protein that was determined by Western blot analysis. RESULTS OLCs showed reduced mineralized nodule formation and several odontoblastic markers expression in response to LPS exposure. Furthermore, inhibition of TLR4, extracellular signal-regulated kinase (ERK), and PI3K/Akt signaling noticeably antagonized LPS-mediated mineralization in OLCs. However, p38 MAPK, c-Jun N-terminal kinase, and NF-κB signaling inhibitors did not affect LPS-mediated mineralization in OLCs. Notably, LPS treatment resulted in a time-dependent phosphorylation of ERK and PI3K/Akt in OLCs, which was abrogated by their specific inhibitors. CONCLUSIONS LPS decreased mineralization in OLCs via TLR4, ERK MAPK, and PI3K/Akt signaling pathways, but not p38, c-Jun N-terminal kinase, or NF-κB signaling.
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Affiliation(s)
- Zhihua Wang
- State Key Laboratory of Military Stomatology, Department of Operative Dentistry and Endodontics, School of Stomatology, Fourth Military Medical University, Xi'an, PR China
| | - Fengle Ma
- State Key Laboratory of Military Stomatology, Department of Operative Dentistry and Endodontics, School of Stomatology, Fourth Military Medical University, Xi'an, PR China
| | - Juan Wang
- State Key Laboratory of Military Stomatology, Department of Operative Dentistry and Endodontics, School of Stomatology, Fourth Military Medical University, Xi'an, PR China
| | - Zeyuan Zhou
- State Key Laboratory of Military Stomatology, Department of Operative Dentistry and Endodontics, School of Stomatology, Fourth Military Medical University, Xi'an, PR China
| | - Baogang Liu
- Department of Stomatology, Lishilu Outpatient Department, Chinese PLA Second Artillery Corps, Beijing, PR China
| | - Xinyao He
- State Key Laboratory of Military Stomatology, Department of Operative Dentistry and Endodontics, School of Stomatology, Fourth Military Medical University, Xi'an, PR China
| | - Lei Fu
- State Key Laboratory of Military Stomatology, Department of Operative Dentistry and Endodontics, School of Stomatology, Fourth Military Medical University, Xi'an, PR China; Department of Stomatology, NingXia People's Hospital, NingXia, Yinchuan, PR China
| | - Wenxi He
- State Key Laboratory of Military Stomatology, Department of Operative Dentistry and Endodontics, School of Stomatology, Fourth Military Medical University, Xi'an, PR China.
| | - Paul R Cooper
- Oral Biology, School of Dentistry, University of Birmingham, Birmingham, West Midlands, United Kingdom
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He W, Wang Z, Luo Z, Yu Q, Jiang Y, Zhang Y, Zhou Z, Smith AJ, Cooper PR. LPS promote the odontoblastic differentiation of human dental pulp stem cells via MAPK signaling pathway. J Cell Physiol 2015; 230:554-61. [PMID: 25104580 DOI: 10.1002/jcp.24732] [Citation(s) in RCA: 84] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Accepted: 08/01/2014] [Indexed: 01/01/2023]
Abstract
Human dental pulp stem cells (hDPSCs) show significant potential for exploitation in novel regeneration strategies, although lack of understanding of their responses to bacterial challenge constrains their application. The present study aimed to investigate whether lipopolysaccharide (LPS), the major pathogenic factor of Gram-negative bacteria, regulates the differentiation of hDPSCs and which intracellular signaling pathways may be involved. LPS treatment significantly promoted the differentiation of hDPSCs demonstrable by increased mineralized nodule formation and mRNA expression of several odontoblastic markers in a dose-dependent manner. While inhibition of TLR4, p38, and ERK signaling markedly antagonized LPS-mediated differentiation of hDPSCs. The inhibition of JNK and NF-κB signaling had no detectable effect on LPS activation of hDPSCs. LPS stimulation resulted in phosphorylation of NF-κB p65, IκB-α, extracellular signal-regulated kinase (ERK), c-Jun N-terminal kinase (JNK), and p38 mitogen-activated protein kinase (MAPK) in DPSCs in a time-dependent manner, which was markedly suppressed by their specific inhibitors, respectively. Data demonstrated that LPS promoted odontoblastic differentiation of hDPSCs via TLR4, ERK, and P38 MAPK signaling pathways, but not NF-κB signaling.
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Affiliation(s)
- Wenxi He
- State Key Laboratory of Military Stomatology, Department of Operative Dentistry and Endodontics, School of Stomatology, The Fourth Military Medical University, Xi'an, P. R. China
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A therapeutic strategy for spinal cord defect: human dental follicle cells combined with aligned PCL/PLGA electrospun material. BIOMED RESEARCH INTERNATIONAL 2015; 2015:197183. [PMID: 25695050 PMCID: PMC4324737 DOI: 10.1155/2015/197183] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Revised: 11/07/2014] [Accepted: 11/13/2014] [Indexed: 02/05/2023]
Abstract
Stem cell implantation has been utilized for the repair of spinal cord injury; however, it shows unsatisfactory performance in repairing large scale lesion of an organ. We hypothesized that dental follicle cells (DFCs), which possess multipotential capability, could reconstruct spinal cord defect (SCD) in combination with biomaterials. In the present study, mesenchymal and neurogenic lineage characteristics of human DFCs (hDFCs) were identified. Aligned electrospun PCL/PLGA material (AEM) was fabricated and it would not lead to cytotoxic reaction; furthermore, hDFCs could stretch along the oriented fibers and proliferate efficiently on AEM. Subsequently, hDFCs seeded AEM was transplanted to restore the defect in rat spinal cord. Functional observation was performed but results showed no statistical significance. The following histologic analyses proved that AEM allowed nerve fibers to pass through, and implanted hDFCs could express oligodendrogenic lineage maker Olig2 in vivo which was able to contribute to remyelination. Therefore, we concluded that hDFCs can be a candidate resource in neural regeneration. Aligned electrospun fibers can support spinal cord structure and induce cell/tissue polarity. This strategy can be considered as alternative proposals for the SCD regeneration studies.
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Potential roles of bone morphogenetic protein (BMP)-9 in human liver diseases. Int J Mol Sci 2014; 15:5199-220. [PMID: 24670474 PMCID: PMC4013558 DOI: 10.3390/ijms15045199] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Revised: 03/07/2014] [Accepted: 03/17/2014] [Indexed: 01/01/2023] Open
Abstract
Bone morphogenetic proteins (BMP-2 to BMP-15) belong to the Transforming Growth Factor (TGF)-β superfamily and, besides their well-documented roles during embryogenesis and bone formation, some of them have recently been described to be involved in the pathogenesis of different organs, including the liver. The role of BMPs in liver damage responses including hepatocellular carcinoma (HCC) development has only begun to be addressed and strong evidence supports the concept of a pro-tumorigenic role of BMP signaling in HCC cells. BMP-9 (also termed Growth and Differentiation Factor (GDF)-2) represents the most recently discovered member of the BMP family. We have previously demonstrated that in HCC patient samples BMP-9 expression was positively associated with the tumor seize (“T stage”) and that it enhanced cell migration and induced epithelial to mesenchymal transition (EMT) in HCC cells in vitro. In another study we recently found that BMP-9 promotes growth in HCC cells, but not in non-transformed hepatocytes. Published as well as unpublished results obtained with primary hepatocytes support the concept of a dual function of BMP-9 in the liver: while in primary, non-malignant cells BMP-9 stabilizes the epithelial phenotype and inhibits proliferation, in HCC cells it induces cell growth and the acquisition of a migratory phenotype. In this review article we summarize current knowledge about BMPs in liver diseases, with special focus on the role of BMP-9 in HCC development and progression, that may provide new clues for a better understanding of the contribution of BMP-signaling to chronic liver diseases.
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Zhao YF, Xu J, Wang WJ, Wang J, He JW, Li L, Dong Q, Xiao Y, Duan XL, Yang X, Liang YW, Song T, Tang M, Zhao D, Luo JY. Activation of JNKs is essential for BMP9-induced osteogenic differentiation of mesenchymal stem cells. BMB Rep 2014; 46:422-7. [PMID: 23977991 PMCID: PMC4133909 DOI: 10.5483/bmbrep.2013.46.8.266] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Although BMP9 is highly capable of promoting osteogenic differentiation of mesenchymal stem cell (MSCs), the molecular mechanism involved remains to be fully elucidated. Here, we explore the possible involvement and detail role of JNKs (c-Jun N-terminal kinases) in BMP9-induced osteogenic differentiation of MSCs. It was found that BMP9 stimulated the activation of JNKs in MSCs. BMP9-induced osteogenic differentiation of MSCs was dramatically inhibited by JNKs inhibitor SP600125. Moreover, BMP9-activated Smads signaling was decreased by SP600125 treatment in MSCs. The effects of inhibitor are reproduced with adenoviruses expressing siRNA targeted JNKs. Taken together, our results revealed that JNKs was activated in BMP9-induced osteogenic differentiation of MSCs. What is most noteworthy, however, is that inhibition of JNKs activity resulted in reduction of BMP9-induced osteogenic differentiation of MSCs, implying that activation of JNKs is essential for BMP9 osteoinductive activity. [BMB Reports 2013; 46(8):422-427]
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Affiliation(s)
- Yan-fang Zhao
- Key Laboratory of Diagnostic Medicine Designated by the Chinese Ministry of Education, Chongqing Medical University, Chongqing, PR China
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Ye G, Li C, Xiang X, Chen C, Zhang R, Yang X, Yu X, Wang J, Wang L, Shi Q, Weng Y. Bone morphogenetic protein-9 induces PDLSCs osteogenic differentiation through the ERK and p38 signal pathways. Int J Med Sci 2014; 11:1065-72. [PMID: 25136261 PMCID: PMC4135228 DOI: 10.7150/ijms.8473] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2014] [Accepted: 07/21/2014] [Indexed: 01/09/2023] Open
Abstract
Periodontal ligament stem cells (PDLSCs) with bone morphogenic ability are used to treat diseases such as periodontitis. Their treatment potential is increased when used in combination with proteins that induce osteogenic differentiation. For example, bone morphogenetic protein-9 (BMP9) has been found to have potent osteogenic activity. In the present study, PDLSCs were isolated from human periodontal membrane and infected with recombinant adenoviruses expressing BMP9 (Ad-BMP9). Levels of osteogenic markers such as runt-related transcription factor 2 (Runx2), alkaline phosphatase (ALP), osteopontin (OPN), and osteocalcin (OCN) as well as mineralization ability were measured. The results showed that BMP9 promoted bone formation of PDLSCs. In other experiments, SB203580 and PD98059, which are inhibitors of p38 and ERK1/2, respectively, were used to determine if these kinases are involved in the osteogenic differentiation process. The resulting protein expression profiles and osteogenic markers of PDLSCs revealed that the mitogen-activated protein kinase (MAPK) signaling pathway might play an important role in the process of BMP9-induced osteogenic differentiation of PDLSCs.
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Affiliation(s)
- Guo Ye
- 1. Chongqing key Laboratory for Oral Diseases and Biomedical Sciences, Chongqing 401147, China ; 2. The Affiliated Hospital of Stomatology, Chongqing Medical University, Chongqing 401147, China
| | - Conghua Li
- 1. Chongqing key Laboratory for Oral Diseases and Biomedical Sciences, Chongqing 401147, China ; 2. The Affiliated Hospital of Stomatology, Chongqing Medical University, Chongqing 401147, China
| | - Xuerong Xiang
- 1. Chongqing key Laboratory for Oral Diseases and Biomedical Sciences, Chongqing 401147, China ; 2. The Affiliated Hospital of Stomatology, Chongqing Medical University, Chongqing 401147, China
| | - Chu Chen
- 3. Department of Laboratory Medicine, M.O.E. Key Laboratory of Laboratory Medicine Diagnostics, Chongqing Medical University, Chongqing 400016, China
| | - Ruyi Zhang
- 3. Department of Laboratory Medicine, M.O.E. Key Laboratory of Laboratory Medicine Diagnostics, Chongqing Medical University, Chongqing 400016, China
| | - Xia Yang
- 1. Chongqing key Laboratory for Oral Diseases and Biomedical Sciences, Chongqing 401147, China ; 2. The Affiliated Hospital of Stomatology, Chongqing Medical University, Chongqing 401147, China
| | - Xuesong Yu
- 1. Chongqing key Laboratory for Oral Diseases and Biomedical Sciences, Chongqing 401147, China ; 2. The Affiliated Hospital of Stomatology, Chongqing Medical University, Chongqing 401147, China
| | - Jinhua Wang
- 1. Chongqing key Laboratory for Oral Diseases and Biomedical Sciences, Chongqing 401147, China ; 2. The Affiliated Hospital of Stomatology, Chongqing Medical University, Chongqing 401147, China
| | - Lan Wang
- 1. Chongqing key Laboratory for Oral Diseases and Biomedical Sciences, Chongqing 401147, China ; 2. The Affiliated Hospital of Stomatology, Chongqing Medical University, Chongqing 401147, China
| | - Qiong Shi
- 3. Department of Laboratory Medicine, M.O.E. Key Laboratory of Laboratory Medicine Diagnostics, Chongqing Medical University, Chongqing 400016, China
| | - Yaguang Weng
- 3. Department of Laboratory Medicine, M.O.E. Key Laboratory of Laboratory Medicine Diagnostics, Chongqing Medical University, Chongqing 400016, China
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