1
|
Zhang J, Suttapreyasri S, Leethanakul C, Samruajbenjakun B. Fabrication of vascularized tissue-engineered bone models using triaxial bioprinting. J Biomed Mater Res A 2024; 112:1093-1106. [PMID: 38411369 DOI: 10.1002/jbm.a.37694] [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: 09/15/2023] [Revised: 01/01/2024] [Accepted: 02/14/2024] [Indexed: 02/28/2024]
Abstract
Bone tissue is a highly vascularized tissue. When constructing tissue-engineered bone models, both the osteogenic and angiogenic capabilities of the construct should be carefully considered. However, fabricating a vascularized tissue-engineered bone to promote vascular formation and bone generation, while simultaneously establishing nutrition channels to facilitate nutrient exchange within the constructs, remains a significant challenge. Triaxial bioprinting, which not only allows the independent encapsulation of different cell types while simultaneously forming nutrient channels, could potentially emerge as a strategy for fabricating vascularized tissue-engineered bone. Moreover, bioinks should also be applied in combination to promote both osteogenesis and angiogenesis. In this study, employing triaxial bioprinting, we used a blend bioink of gelatin methacryloyl (GelMA), sodium alginate (Alg), and different concentrations of nano beta-tricalcium phosphate (nano β-TCP) encapsulated MC3T3-E1 preosteoblasts as the outer layer, a mixed bioink of GelMA and Alg loaded with human umbilical vein endothelial cells (HUVEC) as the middle layer, and gelatin as a sacrificial material to form nutrient channels in the inner layer to fabricate vascularized bone constructs simulating the microenvironment for bone and vascular tissues. The results showed that the addition of nano β-TCP could adjust the mechanical, swelling, and degradation properties of the constructs. Biological assessments revealed the cell viability of constructs containing different concentrations of nano β-TCP was higher than 90% on day 7, The cell-laden constructs containing 3% (w/v) nano β-TCP exhibited better osteogenic (higher Alkaline phosphatase activity and larger Osteocalcin positive area) and angiogenic (the gradual increased CD31 positive area) potential. Therefore, using triaxial bioprinting technology and employing GelMA, Alg, and nano β-TCP as bioink components could fabricate vascularized bone tissue constructs, offering a novel strategy for vascularized bone tissue engineering.
Collapse
Affiliation(s)
- Junbiao Zhang
- Orthodontic Section, Department of Preventive Dentistry, Faculty of Dentistry, Prince of Songkla University, Songkhla, Thailand
- Guiyang Hospital of Stomatology, Guiyang, People's Republic of China
| | - Srisurang Suttapreyasri
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Prince of Songkla University, Hat Yai, Thailand
| | - Chidchanok Leethanakul
- Orthodontic Section, Department of Preventive Dentistry, Faculty of Dentistry, Prince of Songkla University, Songkhla, Thailand
| | - Bancha Samruajbenjakun
- Orthodontic Section, Department of Preventive Dentistry, Faculty of Dentistry, Prince of Songkla University, Songkhla, Thailand
| |
Collapse
|
2
|
Zhao F, Zhang Z, Guo W. The 3-dimensional printing for dental tissue regeneration: the state of the art and future challenges. Front Bioeng Biotechnol 2024; 12:1356580. [PMID: 38456006 PMCID: PMC10917914 DOI: 10.3389/fbioe.2024.1356580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Accepted: 02/06/2024] [Indexed: 03/09/2024] Open
Abstract
Tooth loss or damage poses great threaten to oral and general health. While contemporary clinical treatments have enabled tooth restoration to a certain extent, achieving functional tooth regeneration remains a challenging task due to the intricate and hierarchically organized architecture of teeth. The past few decades have seen a rapid development of three-dimensional (3D) printing technology, which has provided new breakthroughs in the field of tissue engineering and regenerative dentistry. This review outlined the bioactive materials and stem/progenitor cells used in dental regeneration, summarized recent advancements in the application of 3D printing technology for tooth and tooth-supporting tissue regeneration, including dental pulp, dentin, periodontal ligament, alveolar bone and so on. It also discussed current obstacles and potential future directions, aiming to inspire innovative ideas and encourage further development in regenerative medicine.
Collapse
Affiliation(s)
- Fengxiao Zhao
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
- National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu, China
- Department of Pediatric Dentistry, West China School of Stomatology, Sichuan University, Chengdu, China
| | - Zhijun Zhang
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
- National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu, China
- Department of Pediatric Dentistry, West China School of Stomatology, Sichuan University, Chengdu, China
| | - Weihua Guo
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
- National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu, China
- Department of Pediatric Dentistry, West China School of Stomatology, Sichuan University, Chengdu, China
- Yunnan Key Laboratory of Stomatology, The Affiliated Hospital of Stomatology, School of Stomatology, Kunming Medical University, Kunming, China
| |
Collapse
|
3
|
Wang Z, Jiang C, Fan Y, Hao X, Dong Y, He X, Gao J, Zhang Y, Li M, Wang M, Liu Y, Xu W. The application of a 4D-printed chitosan-based stem cell carrier for the repair of corneal alkali burns. Stem Cell Res Ther 2024; 15:41. [PMID: 38355568 PMCID: PMC10865625 DOI: 10.1186/s13287-024-03653-z] [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: 08/26/2023] [Accepted: 01/27/2024] [Indexed: 02/16/2024] Open
Abstract
BACKGROUND Corneal alkali burns can lead to ulceration, perforation, and even corneal blindness due to epithelial defects and extensive cell necrosis, resulting in poor healing outcomes. Previous studies have found that chitosan-based in situ hydrogel loaded with limbal epithelium stem cells (LESCs) has a certain reparative effect on corneal alkali burns. However, the inconsistent pore sizes of the carriers and low cell loading rates have resulted in suboptimal repair outcomes. In this study, 4D bioprinting technology was used to prepare a chitosan-based thermosensitive gel carrier (4D-CTH) with uniform pore size and adjustable shape to improve the transfer capacity of LESCs. METHODS Prepare solutions of chitosan acetate, carboxymethyl chitosan, and β-glycerophosphate sodium at specific concentrations, and mix them in certain proportions to create a pore-size uniform scaffold using 4D bioprinting technology. Extract and culture rat LESCs (rLESCs) in vitro, perform immunofluorescence experiments to observe the positivity rate of deltaNp63 cells for cell identification. Conduct a series of experiments to validate the cell compatibility of 4D-CTH, including CCK-8 assay to assess cell toxicity, scratch assay to evaluate the effect of 4D-CTH on rLESCs migration, and Calcein-AM/PI cell staining experiment to examine the impact of 4D-CTH on rLESCs proliferation and morphology. Establish a severe alkali burn model in rat corneas, transplant rLESCs onto the injured cornea using 4D-CTH, periodically observe corneal opacity and neovascularization using a slit lamp, and evaluate epithelial healing by fluorescein sodium staining. Assess the therapeutic effect 4D-CTH-loaded rLESCs on corneal alkali burn through histological evaluation of corneal tissue paraffin sections stained with hematoxylin and eosin, as well as immunofluorescence staining of frozen sections. RESULTS Using the 4D-CTH, rLESCs were transferred to the alkali burn wounds of rats. Compared with the traditional treatment group (chitosan in situ hydrogel encapsulating rLESCs), the 4D-CTH-rLESC group had significantly higher repair efficiency of corneal injury, such as lower corneal opacity score (1.2 ± 0.4472 vs 0.4 ± 0.5477, p < 0.05) and neovascularization score (5.5 ± 1.118 vs 2.6 ± 0.9618, p < 0.01), and significantly higher corneal epithelial wound healing rate (72.09 ± 3.568% vs 86.60 ± 5.004%, p < 0.01). CONCLUSION In summary, the corneas of the 4D-CTH-rLESC treatment group were similar to the normal corneas and had a complete corneal structure. These findings suggested that LESCs encapsulated by 4D-CTH significantly accelerated corneal wound healing after alkali burn and can be considered as a rapid and effective method for treating epithelial defects.
Collapse
Affiliation(s)
- Zibo Wang
- Institute of Regenerative Medicine and Laboratory Technology Innovation, Qingdao University, Qingdao, 266071, Shandong, China
- Department of Clinical Laboratory, Affiliated Hospital of Qingdao University, Qingdao, 266003, China
| | - Changqing Jiang
- Department of Pathology, Qingdao Municipal Hospital, Qingdao, 266000, Shandong, China
| | - Yuqiao Fan
- Institute of Regenerative Medicine and Laboratory Technology Innovation, Qingdao University, Qingdao, 266071, Shandong, China
| | - Xiaodan Hao
- Institute of Translational Medicine, College of Medicine, Qingdao University, Qingdao, 266003, Shandong, China
| | - Yanhan Dong
- Institute of Translational Medicine, College of Medicine, Qingdao University, Qingdao, 266003, Shandong, China
| | - Xinjia He
- Department of Oncology, Affiliated Hospital of Qingdao University, Qingdao, 266003, Shandong, China
| | - Jinning Gao
- Institute of Translational Medicine, College of Medicine, Qingdao University, Qingdao, 266003, Shandong, China
| | - Yongchun Zhang
- Department of Oncology, Affiliated Hospital of Qingdao University, Qingdao, 266003, Shandong, China
| | - Meng Li
- Institute of Regenerative Medicine and Laboratory Technology Innovation, Qingdao University, Qingdao, 266071, Shandong, China
| | - Mengyuan Wang
- Institute of Regenerative Medicine and Laboratory Technology Innovation, Qingdao University, Qingdao, 266071, Shandong, China
| | - Yiming Liu
- Institute of Regenerative Medicine and Laboratory Technology Innovation, Qingdao University, Qingdao, 266071, Shandong, China
| | - Wenhua Xu
- Institute of Regenerative Medicine and Laboratory Technology Innovation, Qingdao University, Qingdao, 266071, Shandong, China.
| |
Collapse
|