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Zhou Y, Cai X, Zhang X, Dong Y, Pan X, Lai M, Zhang Y, Chen Y, Li X, Li X, Liu J, Zhang Y, Ma F. Mesenchymal stem/stromal cells from human pluripotent stem cell-derived brain organoid enhance the ex vivo expansion and maintenance of hematopoietic stem/progenitor cells. Stem Cell Res Ther 2024; 15:68. [PMID: 38443990 PMCID: PMC10916050 DOI: 10.1186/s13287-023-03624-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Accepted: 12/22/2023] [Indexed: 03/07/2024] Open
Abstract
BACKGROUND Mesenchymal stem/stromal cells (MSCs) are of great therapeutic value due to their role in maintaining the function of hematopoietic stem/progenitor cells (HSPCs). MSCs derived from human pluripotent stem cells represent an ideal alternative because of their unlimited supply. However, the role of MSCs with neural crest origin derived from HPSCs on the maintenance of HSPCs has not been reported. METHODS Flow cytometric analysis, RNA sequencing and differentiation ability were applied to detect the characteristics of stromal cells from 3D human brain organoids. Human umbilical cord blood CD34+ (UCB-CD34+) cells were cultured in different coculture conditions composed of stromal cells and umbilical cord MSCs (UC-MSCs) with or without a cytokine cocktail. The hematopoietic stroma capacity of stromal cells was tested in vitro with the LTC-IC assay and in vivo by cotransplantation of cord blood nucleated cells and stroma cells into immunodeficient mice. RNA and proteomic sequencing were used to detect the role of MSCs on HSPCs. RESULTS The stromal cells, derived from both H1-hESCs and human induced pluripotent stem cells forebrain organoids, were capable of differentiating into the classical mesenchymal-derived cells (osteoblasts, chondrocytes, and adipocytes). These cells expressed MSC markers, thus named pluripotent stem cell-derived MSCs (pMSCs). The pMSCs showed neural crest origin with CD271 expression in the early stage. When human UCB-CD34+ HSPCs were cocultured on UC-MSCs or pMSCs, the latter resulted in robust expansion of UCB-CD34+ HSPCs in long-term culture and efficient maintenance of their transplantability. Comparison by RNA sequencing indicated that coculture of human UCB-CD34+ HSPCs with pMSCs provided an improved microenvironment for HSC maintenance. The pMSCs highly expressed the Wnt signaling inhibitors SFRP1 and SFRP2, indicating that they may help to modulate the cell cycle to promote the maintenance of UCB-CD34+ HSPCs by antagonizing Wnt activation. CONCLUSIONS A novel method for harvesting MSCs with neural crest origin from 3D human brain organoids under serum-free culture conditions was reported. We demonstrate that the pMSCs support human UCB-HSPC expansion in vitro in a long-term culture and the maintenance of their transplantable ability. RNA and proteomic sequencing indicated that pMSCs provided an improved microenvironment for HSC maintenance via mechanisms involving cell-cell contact and secreted factors and suppression of Wnt signaling. This represents a novel method for large-scale production of MSCs of neural crest origin and provides a potential approach for development of human hematopoietic stromal cell therapy for treatment of dyshematopoiesis.
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Affiliation(s)
- Ya Zhou
- Center for Stem Cell Research and Application, Institute of Blood Transfusion, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), Huacai Road 26, Chengdu, 610052, China
| | - Xinping Cai
- Center for Stem Cell Research and Application, Institute of Blood Transfusion, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), Huacai Road 26, Chengdu, 610052, China
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College(CAMS & PUMC), Tianjin, 300020, China
| | - Xiuxiu Zhang
- Center for Stem Cell Research and Application, Institute of Blood Transfusion, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), Huacai Road 26, Chengdu, 610052, China
| | - Yong Dong
- Center for Stem Cell Research and Application, Institute of Blood Transfusion, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), Huacai Road 26, Chengdu, 610052, China
- Department of Immunology, School of Basic Medical Sciences, Chengdu Medical College, Chengdu, China
| | - Xu Pan
- Center for Stem Cell Research and Application, Institute of Blood Transfusion, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), Huacai Road 26, Chengdu, 610052, China
| | - Mowen Lai
- Center for Stem Cell Research and Application, Institute of Blood Transfusion, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), Huacai Road 26, Chengdu, 610052, China
| | - Yimeng Zhang
- Center for Stem Cell Research and Application, Institute of Blood Transfusion, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), Huacai Road 26, Chengdu, 610052, China
| | - Yijin Chen
- Center for Stem Cell Research and Application, Institute of Blood Transfusion, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), Huacai Road 26, Chengdu, 610052, China
| | - Xiaohong Li
- Center for Stem Cell Research and Application, Institute of Blood Transfusion, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), Huacai Road 26, Chengdu, 610052, China
| | - Xia Li
- Center for Stem Cell Research and Application, Institute of Blood Transfusion, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), Huacai Road 26, Chengdu, 610052, China
| | - Jiaxin Liu
- Center for Stem Cell Research and Application, Institute of Blood Transfusion, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), Huacai Road 26, Chengdu, 610052, China
| | - Yonggang Zhang
- Center for Stem Cell Research and Application, Institute of Blood Transfusion, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), Huacai Road 26, Chengdu, 610052, China.
| | - Feng Ma
- Center for Stem Cell Research and Application, Institute of Blood Transfusion, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), Huacai Road 26, Chengdu, 610052, China.
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Tan Y, Qiu Z, Zeng H, Luo J, Wang L, Wang J, Cui K, Zhang G, Zeng Y, Jin H, Chen X, Huang Y, Shu W. Microcystin-leucine-arginine impairs bone microstructure and biomechanics by activating osteoimmune response and inhibiting osteoblasts maturation in developing rats. Toxicology 2023; 494:153595. [PMID: 37467923 DOI: 10.1016/j.tox.2023.153595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 07/06/2023] [Accepted: 07/16/2023] [Indexed: 07/21/2023]
Abstract
Microcystin-LR (MC-LR) affects bone health in adult mice via osteo-immunomodulation. However, its effect on osteoblasts and bone development is unclear. This study investigated the effect of MC-LR on bone osteoimmune and osteoblasts in the developing period. 18 Four-week-old male Sprague Dawley rats were divided into two groups (n = 9 per group) and exposed to 0 (control) and 1 μg/kg b.w. MC-LR (exposure) by intraperitoneal injection for four weeks. The heart blood was collected for serological examination, and the femur for morphological, histopathological, and biomechanical analysis. MC-LR exposure significantly weakened bone microstructures (bone volume, bone volume/total volume, bone trabecular number, connectivity density) and biomechanics (maximum loads and maximum deflection) (P < 0.05). Besides, MC-LR decreased serum procollagen type І car-boxy-terminal propeptide, osteocalcin, bone morphogenetic protein-2, osteoprotegerin, and receptor activator of nuclear factor κB ligand, while elevating osteoclasts number, matrix metalloproteinase-9, β-catenin, Runt-related transcription factor 2, and osterix in bone, and bone alkaline phosphate, C-terminal cross-linked telopeptide of type-I collagen, tartrate-resistant acid phosphatase-5b in serum (P < 0.05). Moreover, MC-LR increased CD4+ T-cells, CD4+/CD8+, M1 and M2 macrophages, and cells apoptosis in the bone marrow, interleukin-6, interleukin-17, and tumor necrosis factor-α in serum, decreased serum interleukin-10 (P < 0.05). Overall, MC-LR can promote bone resorption by activating osteoclasts via osteoimmunology, which may involve macrophages besides lymphocytes. MC-LR may inhibit bone formation by stopping the osteoblasts at an immature stage. Thus, MC-LR weakened bone microstructure and biomechanics in developing period. Its risk on bone development needs further study.
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Affiliation(s)
- Yao Tan
- Department of Environmental Hygiene, College of Preventive Medicine, Army Medical University (Third Military Medical University), Chongqing, China
| | - Zhiqun Qiu
- Department of Environmental Hygiene, College of Preventive Medicine, Army Medical University (Third Military Medical University), Chongqing, China
| | - Hui Zeng
- Department of Environmental Hygiene, College of Preventive Medicine, Army Medical University (Third Military Medical University), Chongqing, China
| | - Jiaohua Luo
- Department of Environmental Hygiene, College of Preventive Medicine, Army Medical University (Third Military Medical University), Chongqing, China
| | - Lingqiao Wang
- Department of Environmental Hygiene, College of Preventive Medicine, Army Medical University (Third Military Medical University), Chongqing, China
| | - Jia Wang
- Department of Environmental Hygiene, College of Preventive Medicine, Army Medical University (Third Military Medical University), Chongqing, China
| | - Ke Cui
- Department of Environmental Hygiene, College of Preventive Medicine, Army Medical University (Third Military Medical University), Chongqing, China
| | - Guowei Zhang
- Department of Environmental Hygiene, College of Preventive Medicine, Army Medical University (Third Military Medical University), Chongqing, China
| | - Yi Zeng
- Department of Environmental Hygiene, College of Preventive Medicine, Army Medical University (Third Military Medical University), Chongqing, China
| | - Huidong Jin
- Department of Environmental Hygiene, College of Preventive Medicine, Army Medical University (Third Military Medical University), Chongqing, China
| | - Xiaoling Chen
- Institute of Immunology, Army Medical University (Third Military Medical University), Chongqing, China
| | - Yujing Huang
- Department of Environmental Hygiene, College of Preventive Medicine, Army Medical University (Third Military Medical University), Chongqing, China.
| | - Weiqun Shu
- Department of Environmental Hygiene, College of Preventive Medicine, Army Medical University (Third Military Medical University), Chongqing, China.
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Tian Y, Lin J, Li X, Zhu G, Fan L, Lou S, Li D, Pan Y. Mechanical dissection and culture of mouse cranial neural crest cells. Birth Defects Res 2023; 115:417-429. [PMID: 36621938 DOI: 10.1002/bdr2.2148] [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: 10/10/2022] [Revised: 12/21/2022] [Accepted: 12/22/2022] [Indexed: 01/10/2023]
Abstract
Owing to the contribution of cranial neural crest cells (CNCCs) to the majority of craniofacial structures, they have been studied extensively for the pathogenesis of craniofacial diseases. To investigate and summarize how to isolate and culture the CNCCs from wild-type mice, a literature search was performed in online databases (PubMed and Web of Science) using optimized keywords "mouse," "cranial neural crest cell" and "culture." The literature was checked by two investigators according to the screening and exclusion criteria. Initially, 197 studies were retrieved from PubMed and 169 from Web of Science, and after excluding replicate studies, 293 articles were considered. Finally, 17 studies met all the criteria and were included in this review. The results showed that obtaining purified stem cells and balancing the need to promote cell growth and prevent unwanted early cell differentiation were the two key points in the isolation and culture of CNCCs. However, no standard criteria are available for answering these questions. Thus, it is important to emphasize the necessity for standardization of CNCC isolation, culture, and identification in research on craniofacial diseases.
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Affiliation(s)
- Yu Tian
- Jiangsu Province Key Laboratory of Oral Diseases, Nanjing, Jiangsu Province, China.,Department of Orthodontics, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Junyan Lin
- Jiangsu Province Key Laboratory of Oral Diseases, Nanjing, Jiangsu Province, China.,Department of Orthodontics, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Xiaofeng Li
- Jiangsu Province Key Laboratory of Oral Diseases, Nanjing, Jiangsu Province, China.,Department of Orthodontics, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Guirong Zhu
- Jiangsu Province Key Laboratory of Oral Diseases, Nanjing, Jiangsu Province, China.,Department of Orthodontics, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Liwen Fan
- Jiangsu Province Key Laboratory of Oral Diseases, Nanjing, Jiangsu Province, China.,Department of Orthodontics, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China.,Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, Jiangsu Province, China
| | - Shu Lou
- Jiangsu Province Key Laboratory of Oral Diseases, Nanjing, Jiangsu Province, China.,Department of Orthodontics, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China.,Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, Jiangsu Province, China
| | - Dandan Li
- Jiangsu Province Key Laboratory of Oral Diseases, Nanjing, Jiangsu Province, China.,Department of Orthodontics, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China.,Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, Jiangsu Province, China
| | - Yongchu Pan
- Jiangsu Province Key Laboratory of Oral Diseases, Nanjing, Jiangsu Province, China.,Department of Orthodontics, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China.,Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, Jiangsu Province, China
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Srinivasan A, Teo N, Poon KJ, Tiwari P, Ravichandran A, Wen F, Teoh SH, Lim TC, Toh YC. Comparative Craniofacial Bone Regeneration Capacities of Mesenchymal Stem Cells Derived from Human Neural Crest Stem Cells and Bone Marrow. ACS Biomater Sci Eng 2020; 7:207-221. [PMID: 33455206 DOI: 10.1021/acsbiomaterials.0c00878] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Most craniofacial bones are derived from the ectodermal germ layer via neural crest stem cells, which are distinct from mesoderm-derived long bones. However, current craniofacial bone tissue engineering approaches do not account for this difference and utilize mesoderm-derived bone marrow mesenchymal stem cells (BM-MSCs) as a paradigm cell source. The effect of the embryonic origin (ontogeny) of an MSC population on its osteogenic differentiation potential and regenerative ability still remains unresolved. To clarify the effects of MSC ontogeny on bone regenerative ability, we directly compared the craniofacial bone regenerative abilities of an ecto-mesenchymal stem cell (eMSC) population, which is derived from human embryonic stem cells via a neural crest intermediate, with mesodermal adult BM-MSCs. eMSCs showed comparable osteogenic and chondrogenic ability to BM-MSCs in 2-D in vitro culture, but lower adipogenic ability. They exhibited greater proliferation than BM-MSCs and comparable construct mineralization in a well-established 3-D polycaprolactone-tricalcium phosphate (PCL-TCP) scaffold system in vitro. eMSC-derived 3D osteogenic constructs were maintained for longer in a proliferative osteoblast state and exhibited differential levels of genes related to fibroblast growth factor (FGF) signaling compared to BM-MSCs. Although both eMSC and BM-MSC-seeded scaffold constructs could promote bone regeneration in a rat calvarial defect model, eMSC-derived osseous constructs had significantly higher cellularity due to increased number of proliferative (Ki67+) cells than those seeded with BM-MSCs, and exhibited enhanced new bone formation in the defect area as compared to untreated controls. Overall, our study demonstrates the potential of human eMSCs for future clinical use in craniofacial regeneration applications and indicates the importance of considering MSC origin when selecting an MSC source for regenerative applications.
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Affiliation(s)
- Akshaya Srinivasan
- Department of Biomedical Engineering, National University of Singapore, 4 Engineering Drive 3, #04-08, Singapore, 117583.,Department of Orthopaedic Surgery, Yong Loo Lin School of Medicine, National University of Singapore, 1E Kent Ridge Road, Singapore, 119288.,NUS Tissue Engineering Program (NUSTEP), National University of Singapore, DSO (Kent Ridge), 27 Medical Drive, #04-01, Singapore, 117510
| | - Nelson Teo
- Department of Surgery, National University of Singapore, 1E Kent Ridge Road, Singapore, 119228
| | - Kei Jun Poon
- Department of Surgery, National University of Singapore, 1E Kent Ridge Road, Singapore, 119228
| | - Priya Tiwari
- Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, National University Hospital, 1E Kent Ridge Road, Singapore, 119228
| | - Akhilandeshwari Ravichandran
- School of Chemical and Biomedical Engineering & Lee Kong Chian School of Medicine, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459.,School of Mechanical, Medical and Process Engineering, Queensland University of Technology, 2 George Street, Brisbane, Queensland 4001, Australia
| | - Feng Wen
- School of Chemical and Biomedical Engineering & Lee Kong Chian School of Medicine, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459
| | - Swee Hin Teoh
- School of Chemical and Biomedical Engineering & Lee Kong Chian School of Medicine, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459
| | - Thiam Chye Lim
- Department of Surgery, National University of Singapore, 1E Kent Ridge Road, Singapore, 119228.,Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, National University Hospital, 1E Kent Ridge Road, Singapore, 119228
| | - Yi-Chin Toh
- Department of Biomedical Engineering, National University of Singapore, 4 Engineering Drive 3, #04-08, Singapore, 117583.,NUS Tissue Engineering Program (NUSTEP), National University of Singapore, DSO (Kent Ridge), 27 Medical Drive, #04-01, Singapore, 117510.,School of Mechanical, Medical and Process Engineering, Queensland University of Technology, 2 George Street, Brisbane, Queensland 4001, Australia.,Institute of Health and Biomedical Innovation, Queensland University of Technology, 60 Musk Avenue, Kelvin Grove, Queensland 4059, Australia.,Centre for Biomedical Technologies, Queensland University of Technology, 60 Musk Avenue, Kelvin Grove, Queensland 4059, Australia
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Srinivasa Reddy T, Privér SH, Mirzadeh N, Luwor RB, Ganga Reddy V, Ramesan S, Bhargava SK. Antitumor and Antiangiogenic Properties of Gold(III) Complexes Containing Cycloaurated Triphenylphosphine Sulfide Ligands. Inorg Chem 2020; 59:5662-5673. [PMID: 32255617 DOI: 10.1021/acs.inorgchem.0c00423] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A family of stable anticancer gold(III)-based therapeutic complexes containing cyclometalated triphenylphosphine sulfide ligands have been prepared. The anticancer properties of the newly developed complexes [AuCl2{κ2-2-C6H4P(S)Ph2}] (1), [Au(κ2-S2CNEt2){κ2-2-C6H4P(S)Ph2}]PF6 (2), [AuCl(dppe){κC-2-C6H4P(S)Ph2}]Cl (3), and [Au(dppe){κ2-2-C6H4P(S)Ph2}][PF6]2 (4) were investigated toward five human cancer cell lines [cervical (HeLa), lung (A549), prostate (PC3), fibrosarcoma (HT1080), and breast (MDA-MB-231)]. In vitro cytotoxicity studies revealed that compounds 2-4 displayed potent cell growth inhibition (IC50 values in the range of 0.17-2.50 μM), comparable to, or better than, clinically used cisplatin (0.63-6.35 μM). Preliminary mechanistic studies using HeLa cells indicate that the cytotoxic effects of the compounds involve apoptosis induction through ROS accumulation. Compound 2 also demonstrated significant inhibition of endothelial cell migration and tube formation in the angiogenesis process. Evaluation of the in vivo antitumor activity of compound 2 in nude mice bearing cervical cancer cell (HeLa) xenografts indicated significant tumor growth inhibition (55%) with 1 mg/kg dose (every 3 days) compared with the same dose of cisplatin (28%). These results demonstrate the potential of gold(III) complexes containing cyclometalated triphenylphosphine sulfide ligands as novel metal-based anticancer agents.
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Affiliation(s)
- T Srinivasa Reddy
- Centre for Advanced Materials and Industrial Chemistry, School of Science, RMIT University, G.P.O. Box 2476, Melbourne 3001, Australia
| | - Steven H Privér
- Centre for Advanced Materials and Industrial Chemistry, School of Science, RMIT University, G.P.O. Box 2476, Melbourne 3001, Australia
| | - Nedaossadat Mirzadeh
- Centre for Advanced Materials and Industrial Chemistry, School of Science, RMIT University, G.P.O. Box 2476, Melbourne 3001, Australia
| | - Rodney B Luwor
- Department of Surgery, Royal Melbourne Hospital, University of Melbourne, Parkville 3050, Australia
| | - Velma Ganga Reddy
- Centre for Advanced Materials and Industrial Chemistry, School of Science, RMIT University, G.P.O. Box 2476, Melbourne 3001, Australia
| | - Shwathy Ramesan
- School of Engineering, RMIT University, G.P.O. Box 2476, Melbourne 3001, Australia
| | - Suresh K Bhargava
- Centre for Advanced Materials and Industrial Chemistry, School of Science, RMIT University, G.P.O. Box 2476, Melbourne 3001, Australia
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Abstract
With the rapidly development of clinical treatments, precision medicine has come to people eyes with the requirement according to different people and different disease situation. So precision medicine is called personalized medicine which is a new frontier of healthcare. Bone tissue engineering developed from traditional bone graft to precise medicine era. So scientists seek approaches to harness stem cells, scaffolds, growth factors, and extracellular matrix to promise enhanced and more reliable bone formation. This review provides an overview of novel developments on precision medicine in tissue engineering of bone hoping it can open new perspectives of strategies on bone treatment.
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Affiliation(s)
| | | | - Rong Zhou
- Department of Stomatology, Shanghai 10th People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Haixia Liu
- Department of Stomatology, Shanghai 10th People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Shengcai Qi
- Department of Stomatology, Shanghai 10th People's Hospital, Tongji University School of Medicine, Shanghai, China.
| | - Raorao Wang
- Department of Stomatology, Shanghai 10th People's Hospital, Tongji University School of Medicine, Shanghai, China.
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Gu L, Zhang J, Li L, Du Z, Cai Q, Yang X. Hydroxyapatite nanowire composited gelatin cryogel with improved mechanical properties and cell migration for bone regeneration. ACTA ACUST UNITED AC 2019; 14:045001. [PMID: 30939454 DOI: 10.1088/1748-605x/ab1583] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Hydrogels are normally not robust enough to meet the repairing requirements of bone defects, therefore, cryogels of higher mechanical properties are developed as the more proper candidates for the purpose. In view of the organic-inorganic composition of natural bone tissues, hydroxyapatite (HA) is envisioned as a good additive for protein cryogels to achieve biomimetic compositions, additionally, as an excellent reinforcement to increase the mechanical properties of cryogels. In this study, methacrylated gelatin (GelMA) was synthesized and corresponding 3D-structured cryogel was fabricated, followed by the incorporation of HA nanowires (HANWs) at different amounts as reinforcements. The results showed that the GelMA/HANW composite cryogels possessed highly porous structure with HANWs being homogeneously distributed. The compressive strengths and mechanical stability of the composite cryogels were improved alongside the increasing contents of HANWs. These composite cryogels were proven non-cytotoxic, able to support cell proliferation and promote osteogenic differentiation of bone mesenchymal stromal cells. More importantly, their porous structure allowed cell migration within the matrix, which was normally hard to be achieved in GelMA hydrogel. With improved performance, GelMA/HANW composite cryogels were thus possibly serving as a new type of bone repair materials.
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Affiliation(s)
- Lihua Gu
- State Key Laboratory of Organic-Inorganic Composites; Beijing Laboratory of Biomedical Materials; Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
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Smith EE, Angstadt S, Monteiro N, Zhang W, Khademhosseini A, Yelick PC. Bioengineered Tooth Buds Exhibit Features of Natural Tooth Buds. J Dent Res 2018; 97:1144-1151. [PMID: 29879370 DOI: 10.1177/0022034518779075] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Tooth loss is a significant health issue currently affecting millions of people worldwide. Artificial dental implants, the current gold standard tooth replacement therapy, do not exhibit many properties of natural teeth and can be associated with complications leading to implant failure. Here we propose bioengineered tooth buds as a superior alternative tooth replacement therapy. We describe improved methods to create highly cellularized bioengineered tooth bud constructs that formed hallmark features that resemble natural tooth buds such as the dental epithelial stem cell niche, enamel knot signaling centers, transient amplifying cells, and mineralized dental tissue formation. These constructs were composed of postnatal dental cells encapsulated within a hydrogel material that were implanted subcutaneously into immunocompromised rats. To our knowledge, this is the first report describing the use of postnatal dental cells to create bioengineered tooth buds that exhibit evidence of these features of natural tooth development. We propose future bioengineered tooth buds as a promising, clinically relevant tooth replacement therapy.
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Affiliation(s)
- E E Smith
- 1 Program in Cell, Molecular, and Developmental Biology, Sackler School of Graduate Biomedical Sciences, Tufts University School Medicine, Boston, MA, USA
| | - S Angstadt
- 2 Department of Orthodontics, Tufts University School of Dental Medicine, Boston, MA, USA
| | - N Monteiro
- 2 Department of Orthodontics, Tufts University School of Dental Medicine, Boston, MA, USA
| | - W Zhang
- 2 Department of Orthodontics, Tufts University School of Dental Medicine, Boston, MA, USA
| | - A Khademhosseini
- 3 Department of Bioengineering, University of California Los Angeles, Los Angeles, CA, USA
| | - P C Yelick
- 1 Program in Cell, Molecular, and Developmental Biology, Sackler School of Graduate Biomedical Sciences, Tufts University School Medicine, Boston, MA, USA.,2 Department of Orthodontics, Tufts University School of Dental Medicine, Boston, MA, USA
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