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Ai X, Luo R, Wang H, Yan B, Li K, Yu X, Dong W, Tan Y, Liu M, Chen Y, Lu T, Wang X, Wang W, Fu W. Vascular endothelial growth factor a modified mRNA engineered cellular electrospun membrane complexes promotes mouse skin wound repair. Mater Today Bio 2023; 22:100776. [PMID: 37664797 PMCID: PMC10474086 DOI: 10.1016/j.mtbio.2023.100776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Revised: 08/13/2023] [Accepted: 08/22/2023] [Indexed: 09/05/2023] Open
Abstract
Artificial skin substitutes are one of the most promising areas of wound healing research; however, graft survival largely depends on how the treatment is performed. Early angiogenesis is essential for wound healing and graft survival and vascular endothelial growth factor A (VEGFA) is an important cytokine that stimulates angiogenesis. Here, we first investigated the effects of different ratios of collagen (BC) and gelatin blended with poly (l-lactide-co-caprolactone) (PLCL) on nanofibrous membranes. The Young's modulus and cell proliferation were significantly higher in the 50% BC group than that in all other groups. Then, cellular electrospun membrane complexes (CEMC) were successfully constructed from nanoscaffolds and fibroblasts extracted from human foreskin and engineered with controlled autocrine VEGFA by transfecting VEGFA modified mRNA (modRNA). Engineered CEMC significantly promoted wound healing in vivo and contributed to stable vascular network formation in the grafted area, thereby increasing the survival rate of the engineered skin. This study provides a potential solution for wound healing while establishing the value of different RNA modification methods for various engineered skins in the future, thereby advancing engineered skin development.
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Affiliation(s)
- Xuefeng Ai
- Department of Pediatric Cardiothoracic Surgery, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - Runjiao Luo
- Department of Pediatric Cardiothoracic Surgery, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - Huijing Wang
- Institute of Pediatric Translational Medicine, Shanghai Institute for Pediatric Congenital Heart Disease, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, China
| | - Bingqian Yan
- Institute of Pediatric Translational Medicine, Shanghai Institute for Pediatric Congenital Heart Disease, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, China
| | - Kaixiang Li
- Department of Pediatric Cardiothoracic Surgery, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - Xindi Yu
- Department of Pediatric Cardiothoracic Surgery, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - Wei Dong
- Department of Pediatric Cardiothoracic Surgery, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - Yao Tan
- Institute of Pediatric Translational Medicine, Shanghai Institute for Pediatric Congenital Heart Disease, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, China
| | - Minglu Liu
- Department of Pediatric Cardiothoracic Surgery, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - Ying Chen
- Institute of Pediatric Translational Medicine, Shanghai Institute for Pediatric Congenital Heart Disease, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, China
| | - Tingting Lu
- Institute of Pediatric Translational Medicine, Shanghai Institute for Pediatric Congenital Heart Disease, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, China
| | - Xiangying Wang
- Institute of Pediatric Translational Medicine, Shanghai Institute for Pediatric Congenital Heart Disease, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, China
| | - Wei Wang
- Department of Pediatric Cardiothoracic Surgery, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - Wei Fu
- Institute of Pediatric Translational Medicine, Shanghai Institute for Pediatric Congenital Heart Disease, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, China
- Shanghai Key Laboratory of Tissue Engineering, Shanghai 9th People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200011, China
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Wang JJ, Yu YY, Wang PY, Huang XM, Chen X, Chen XG. Sequential treatment for diabetic foot ulcers in dialysis patients: A case report. World J Diabetes 2023; 14:1323-1329. [PMID: 37664469 PMCID: PMC10473955 DOI: 10.4239/wjd.v14.i8.1323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 05/16/2023] [Accepted: 07/14/2023] [Indexed: 08/11/2023] Open
Abstract
BACKGROUND Diabetic foot ulcers (DFUs) are common in patients with diabetes, especially those undergoing hemodialysis. In severe cases, these ulcers can cause damage to the lower extremities and lead to amputation. Traditional treatments such as flap transposition and transfemoral amputation are not always applicable in all cases. Therefore, there is a need for alternative treatment methods. CASE SUMMARY This report describes a 62-year-old female patient who was admitted to the hospital with plantar and heel ulcers on her left foot. The patient had a history of renal failure and was undergoing regular hemodialysis. Digital subtraction angiography showed extensive stenosis and occlusion in the left superficial femoral artery, left peroneal artery and left posterior tibial artery. Following evaluation by a multidisciplinary team, the patient was diagnosed with type 2 DFUs (TEXAS 4D). Traditional treatments were deemed unsuitable, and the patient was treated with endovascular surgery in the affected area, in addition to supportive medical treatment, local debridement, and sequential repair using split-thickness skin and tissue-engineered skin grafts combined with negative pressure treatment. After four months, the wound had completely healed, and the patient was able to walk with a walking aid. CONCLUSION This study demonstrates a new treatment method for DFUs was successful, using angioplasty, skin grafts, and negative pressure.
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Affiliation(s)
- Jin-Jun Wang
- College of Marine Life Science, Ocean University of China, Qingdao 266003, Shandong Province, China
- Department of Vascular Surgery, Qingdao Haici Hospital Affiliated to Qingdao University, Qingdao 266033, Shandong Province, China
| | - Yuan-Yuan Yu
- Department of Vascular Surgery, Qingdao Haici Hospital Affiliated to Qingdao University, Qingdao 266033, Shandong Province, China
| | - Pin-Yi Wang
- Department of Vascular Surgery, Qingdao Haici Hospital Affiliated to Qingdao University, Qingdao 266033, Shandong Province, China
| | - Xian-Ming Huang
- Department of Vascular Surgery, Qingdao Haici Hospital Affiliated to Qingdao University, Qingdao 266033, Shandong Province, China
| | - Xiao Chen
- Department of Vascular Surgery, Qingdao Haici Hospital Affiliated to Qingdao University, Qingdao 266033, Shandong Province, China
| | - Xi-Guang Chen
- College of Marine Life Science, Ocean University of China, Qingdao 266003, Shandong Province, China
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Wang Z, Xu H, Yang H, Zhang Y, Wang X, Wang P, Xu Z, Lv D, Rong Y, Dong Y, Tang B, Hu Z, Deng W, Zhu J. Single-stage transplantation combined with epidermal stem cells promotes the survival of tissue-engineered skin by inducing early angiogenesis. Stem Cell Res Ther 2023; 14:51. [PMID: 36959609 PMCID: PMC10035248 DOI: 10.1186/s13287-023-03281-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Accepted: 03/13/2023] [Indexed: 03/25/2023] Open
Abstract
BACKGROUND The composite transplantation of a split-thickness skin graft (STSG) combined with an acellular dermal matrix (ADM) is a promising repair method for full-thickness skin defects. Due to delayed vascularization of the ADM, no currently available engineered skin tissue is able to permanently cover full-thickness skin defects via a single-stage procedure. Epidermal stem cells (EpSCs) have been found to promote angiogenesis in the wound bed. Whether EpSCs can induce early angiogenesis of dermal substitutes and promote the survival of single-stage tissue-engineered skin transplantation needs to be further studied. METHODS In vitro, rat vascular endothelial cells (RVECs) were treated with the supernatant of EpSCs cultured in ADM and stimulated for 48 h. RVECs were analysed by RNA sequencing and tube formation assays. For the in vivo experiment, 75 rats were randomly divided into five groups: ADM, ADM + EpSCs (AE), STSG, ADM + STSG (AS), and ADM + STSG + EpSCs (ASE) groups. The quality of wound healing was estimated by general observation and H&E and Masson staining. The blood perfusion volume was evaluated using the LDPI system, and the expression of vascular markers was determined by immunohistochemistry (IHC). RESULTS The active substances secreted by EpSCs cultured in ADM promoted angiogenesis, as shown by tube formation experiments and RNA-seq. EpSCs promoted epithelialization of the ADM and vascularization of the ADM implant. The ASE group showed significantly increased skin graft survival, reduced skin contraction, and an improved cosmetic appearance compared with the AS group and the STSG control group. CONCLUSIONS In summary, our findings suggest that EpSCs promote the formation of new blood vessels in dermal substitutes and support one-step transplantation of tissue-engineered skin, and thereby provide new ideas for clinical application.
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Affiliation(s)
- Zhiyong Wang
- Department of Burn and Wound Repair Surgery, First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Hailin Xu
- Department of Burn and Wound Repair Surgery, First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Hao Yang
- Department of Burn and Wound Repair Surgery, First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Yi Zhang
- Department of Burn and Plastic Surgery, Affiliated Hospital of Nantong University, Nantong, China
| | - Xiaoyan Wang
- Department of Burn and Wound Repair Surgery, First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Peng Wang
- Department of Burn and Wound Repair Surgery, First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Zhongye Xu
- Department of Burn and Wound Repair Surgery, First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Dongming Lv
- Department of Burn and Wound Repair Surgery, First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Yanchao Rong
- Department of Burn and Wound Repair Surgery, First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Yunxian Dong
- Department of Plastic Surgery, Guangdong Second Provincial General Hospital, Southern Medical University, Guangzhou, China
| | - Bing Tang
- Department of Burn and Wound Repair Surgery, First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Zhicheng Hu
- Department of Burn and Wound Repair Surgery, First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China.
| | - Wuguo Deng
- Collaborative Innovation Center of Cancer Medicine, State Key Laboratory of Oncology in South China, Sun Yat-Sen University Cancer Center, Guangzhou, China.
| | - Jiayuan Zhu
- Department of Burn and Wound Repair Surgery, First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China.
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Shen Z, Sun L, Liu Z, Li M, Cao Y, Han L, Wang J, Wu X, Sang S. Rete ridges: Morphogenesis, function, regulation, and reconstruction. Acta Biomater 2023; 155:19-34. [PMID: 36427683 DOI: 10.1016/j.actbio.2022.11.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 10/29/2022] [Accepted: 11/16/2022] [Indexed: 11/25/2022]
Abstract
Rete ridges (RRs) are distinct undulating microstructures at the junction of the dermis and epidermis in the skin of humans and certain animals. This structure is essential for enhancing the mechanical characteristics of skin and preserving homeostasis. With the development of tissue engineering and regenerative medicine, artificial skin grafts have made great progress in the field of skin healing. However, the restoration of RRs has been often disregarded or absent in artificial skin grafts, which potentially compromise the efficacy of tissue repair and regeneration. Therefore, this review collates recent research advances in understanding the structural features, function, morphogenesis, influencing factors, and reconstruction strategies pertaining to RRs. In addition, the preparation methods and limitations of tissue-engineered skin with RRs are discussed. STATEMENT OF SIGNIFICANCE: The technology for the development of tissue-engineered skin (TES) is widely studied and reported; however, the preparation of TES containing rete ridges (RRs) is often ignored, with no literature reviews on the structural reconstruction of RRs. This review focuses on the progress pertaining to RRs and focuses on the reconstruction methods for RRs. In addition, it discusses the limitations of existing reconstruction methods. Therefore, this review could be a valuable reference for transferring TES with RR structure from the laboratory to clinical applications in skin repair.
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Affiliation(s)
- Zhizhong Shen
- Shanxi Key Laboratory of Micro Nano Sensors & Artificial Intelligence Perception, College of Information and Computer, Taiyuan University of Technology, Taiyuan 030024, China
| | - Lei Sun
- Shanxi Key Laboratory of Micro Nano Sensors & Artificial Intelligence Perception, College of Information and Computer, Taiyuan University of Technology, Taiyuan 030024, China; Key Lab of Advanced Transducers and Intelligent Control System of the Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China
| | - Zixian Liu
- Shanxi Key Laboratory of Micro Nano Sensors & Artificial Intelligence Perception, College of Information and Computer, Taiyuan University of Technology, Taiyuan 030024, China; Key Lab of Advanced Transducers and Intelligent Control System of the Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China
| | - Meng Li
- Shanxi Key Laboratory of Micro Nano Sensors & Artificial Intelligence Perception, College of Information and Computer, Taiyuan University of Technology, Taiyuan 030024, China; Shanxi Research Institute of 6D Artificial Intelligence Biomedical Science, Taiyuan 030031, China
| | - Yanyan Cao
- Shanxi Key Laboratory of Micro Nano Sensors & Artificial Intelligence Perception, College of Information and Computer, Taiyuan University of Technology, Taiyuan 030024, China; Shanxi Research Institute of 6D Artificial Intelligence Biomedical Science, Taiyuan 030031, China
| | - Lu Han
- Shanxi Key Laboratory of Micro Nano Sensors & Artificial Intelligence Perception, College of Information and Computer, Taiyuan University of Technology, Taiyuan 030024, China; Shanxi Research Institute of 6D Artificial Intelligence Biomedical Science, Taiyuan 030031, China
| | - Jianming Wang
- General Hospital of TISCO, North Street, Xinghualing District, Taiyuan 030809, China
| | - Xunwei Wu
- Department of Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong, China; Engineering Laboratory for Biomaterials and Tissue Regeneration, Ningbo Stomatology Hospital, Savaid Stomatology School, Hangzhou Medical College, Ningbo, China.
| | - Shengbo Sang
- Shanxi Key Laboratory of Micro Nano Sensors & Artificial Intelligence Perception, College of Information and Computer, Taiyuan University of Technology, Taiyuan 030024, China; Key Lab of Advanced Transducers and Intelligent Control System of the Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China.
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5
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Zhang HL, Sun H, Yang YF, Li YM. Skin substitutes comprised of recombinant human collagen hydrogel promote full-thickness skin defect reconstruction. Burns 2022; 48:1523-1524. [PMID: 35786501 DOI: 10.1016/j.burns.2022.06.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 06/10/2022] [Indexed: 01/03/2023]
Affiliation(s)
- Han-Lin Zhang
- Institute of Regenerative Medicine, Affiliated Hospital of Jiangsu University, Jiangsu University, Zhenjiang 212001, Jiangsu Province, China; Department of Dermatology, Affiliated Hospital of Jiangsu University, Jiangsu University, Zhenjiang, Jiangsu 212001, China; School of Medicine, Jiangsu University, Zhenjiang, Jiangsu 212001, China
| | - Hui Sun
- Institute of Regenerative Medicine, Affiliated Hospital of Jiangsu University, Jiangsu University, Zhenjiang 212001, Jiangsu Province, China; Department of Dermatology, Affiliated Hospital of Jiangsu University, Jiangsu University, Zhenjiang, Jiangsu 212001, China; School of Medicine, Jiangsu University, Zhenjiang, Jiangsu 212001, China
| | - Yi-Fei Yang
- Institute of Regenerative Medicine, Affiliated Hospital of Jiangsu University, Jiangsu University, Zhenjiang 212001, Jiangsu Province, China; Department of Dermatology, Affiliated Hospital of Jiangsu University, Jiangsu University, Zhenjiang, Jiangsu 212001, China; School of Medicine, Jiangsu University, Zhenjiang, Jiangsu 212001, China
| | - Yu-Mei Li
- Institute of Regenerative Medicine, Affiliated Hospital of Jiangsu University, Jiangsu University, Zhenjiang 212001, Jiangsu Province, China; Department of Dermatology, Affiliated Hospital of Jiangsu University, Jiangsu University, Zhenjiang, Jiangsu 212001, China; School of Medicine, Jiangsu University, Zhenjiang, Jiangsu 212001, China.
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Shen Z, Cao Y, Li M, Yan Y, Cheng R, Zhao Y, Shao Q, Wang J, Sang S. Construction of tissue-engineered skin with rete ridges using co-network hydrogels of gelatin methacrylated and poly(ethylene glycol) diacrylate. Mater Sci Eng C Mater Biol Appl 2021; 129:112360. [PMID: 34579879 DOI: 10.1016/j.msec.2021.112360] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 07/19/2021] [Accepted: 08/05/2021] [Indexed: 02/08/2023]
Abstract
Tissue-engineered skin, as a promising skin substitute, can be used for in vitro skin research and skin repair. However, most of research on tissue-engineered skin tend to ignore the rete ridges (RRs) microstructure, which enhances the adhesion between dermis and epidermis and provides a growth environment for epidermal stem cells. Here, we prepared and characterized photocurable gelatin methacrylated (GelMA) and poly(ethylene glycol) diacrylate (PEGDA) co-network hydrogels with different concentrations. Using a UV curing 3D printer, resin molds were designed and fabricated to create three-dimensional micropatterns and replicated onto GelMA-PEGDA scaffolds. Human keratinocytes (HaCaTs) and human skin fibroblasts (HSFs) were co-cultured on the hydrogel scaffold to prepare tissue-engineered skin. The results showed that 10%GelMA-2%PEGDA hydrogel provides the sufficient mechanical properties and biocompatibility to prepare a human skin model with RRs microstructure, that is, it presents excellent structural support, suitable degradation rate, good bioactivity and is suitable for long-term culturing. Digital microscope image analyses showed the micropattern was well-transferred onto the scaffold surface. Both in vitro and in vivo experiments confirmed the formation of the epidermal layer with undulating microstructure. In wound healing experiments, hydrogel can significantly accelerate wound healing. This study provides a simple and powerful way to mimic the structures of human skin and can make a contribution to skin tissue engineering and wound healing.
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Affiliation(s)
- Zhizhong Shen
- MicroNano System Research Center, Key Lab of Advanced Transducers and Intelligent Control System of the Ministry of Education & College of Information and Computer, Taiyuan University of Technology, Taiyuan 030024, China
| | - Yanyan Cao
- MicroNano System Research Center, Key Lab of Advanced Transducers and Intelligent Control System of the Ministry of Education & College of Information and Computer, Taiyuan University of Technology, Taiyuan 030024, China; College of Information Science and Engineering, Hebei North University, Zhangjiakou 075000, China
| | - Meng Li
- MicroNano System Research Center, Key Lab of Advanced Transducers and Intelligent Control System of the Ministry of Education & College of Information and Computer, Taiyuan University of Technology, Taiyuan 030024, China
| | - Yayun Yan
- MicroNano System Research Center, Key Lab of Advanced Transducers and Intelligent Control System of the Ministry of Education & College of Information and Computer, Taiyuan University of Technology, Taiyuan 030024, China
| | - Rong Cheng
- MicroNano System Research Center, Key Lab of Advanced Transducers and Intelligent Control System of the Ministry of Education & College of Information and Computer, Taiyuan University of Technology, Taiyuan 030024, China
| | - Yajing Zhao
- MicroNano System Research Center, Key Lab of Advanced Transducers and Intelligent Control System of the Ministry of Education & College of Information and Computer, Taiyuan University of Technology, Taiyuan 030024, China
| | - Quan Shao
- General Hospital of TISCO, North Street, Xinghualing District, Taiyuan 030024, China
| | - Jianming Wang
- General Hospital of TISCO, North Street, Xinghualing District, Taiyuan 030024, China.
| | - Shengbo Sang
- MicroNano System Research Center, Key Lab of Advanced Transducers and Intelligent Control System of the Ministry of Education & College of Information and Computer, Taiyuan University of Technology, Taiyuan 030024, China.
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Zhang Q, Wen J, Liu C, Ma C, Bai F, Leng X, Chen Z, Xie Z, Mi J, Wu X. Early-stage bilayer tissue-engineered skin substitute formed by adult skin progenitor cells produces an improved skin structure in vivo. Stem Cell Res Ther 2020; 11:407. [PMID: 32948249 PMCID: PMC7501683 DOI: 10.1186/s13287-020-01924-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 07/27/2020] [Accepted: 09/03/2020] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND In recent years, significant progress has been made in developing highly complex tissue-engineered skin substitutes (TESSs) for wound healing. However, the lack of skin appendages, such as hair follicles and sweat glands, and the time required, are two major limitations that hinder its broad application in the clinic. Therefore, it is necessary to develop a competent TESS in a short time to meet the needs for clinical applications. METHODS Adult scalp dermal progenitor cells and epidermal stem cells together with type I collagen as a scaffold material were used to reconstitute bilayer TESSs in vitro. TESSs at 4 different culture times (5, 9, 14, and 21 days) were collected and then grafted onto full-thickness wounds created in the dorsal skin of athymic nude/nude mice. The skin specimens formed from grafted TESSs were collected 4 and 8 weeks later and then evaluated for their structure, cell organization, differentiation status, vascularization, and formation of appendages by histological analysis, immunohistochemistry, and immunofluorescent staining. RESULTS Early-stage bilayer TESSs after transplantation had a better efficiency of grafting. A normal structure of stratified epidermis containing multiple differentiated layers of keratinocytes was formed in all grafts from both early-stage and late-stage TESSs, but higher levels of the proliferation marker Ki-67 and the epidermal progenitor marker p63 were found in the epidermis formed from early-stage TESSs. Interestingly, the transplantation of early-stage TESSs produced a thicker dermis that contained more vimentin- and CD31-positive cells, and importantly, hair follicle formation was only observed in the skin grafted from early-stage TESSs. Finally, early-stage TESSs expressed high levels of p63 but had low expression levels of genes involved in the activation of the apoptotic pathway compared to the late-stage TESSs in vitro. CONCLUSIONS Early-stage bilayer TESSs reconstituted from skin progenitor cells contained more competent cells with less activation of the apoptotic pathway and produced a better skin structure, including hair follicles associated with sebaceous glands, after transplantation, which should potentially provide better wound healing when applied in the clinic in the future.
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Affiliation(s)
- Qun Zhang
- Department of Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, No.44-1 Wenhua Road West, Jinan, Shandong, China
| | - Jie Wen
- Department of Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, No.44-1 Wenhua Road West, Jinan, Shandong, China
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Science, Shandong University, Qingdao, China
| | - Chang Liu
- Department of Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, No.44-1 Wenhua Road West, Jinan, Shandong, China
| | - Chuan Ma
- Department of Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, No.44-1 Wenhua Road West, Jinan, Shandong, China
| | - Fuxiang Bai
- Department of Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, No.44-1 Wenhua Road West, Jinan, Shandong, China
| | - Xue Leng
- Department of Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, No.44-1 Wenhua Road West, Jinan, Shandong, China
| | - Zhihong Chen
- Qilu Children's Hospital of Shandong University, Jinan, China
| | - Zhiwei Xie
- Department of Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, No.44-1 Wenhua Road West, Jinan, Shandong, China
- Department of Stomatology, Shengli Oilfield Center Hospital, Dongying, Shandong, China
| | - Jun Mi
- Department of Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, No.44-1 Wenhua Road West, Jinan, Shandong, China
| | - Xunwei Wu
- Department of Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, No.44-1 Wenhua Road West, Jinan, Shandong, China.
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Sharma K, Bullock AJ, Giblin V, MacNeil S. Identification of a fibrin concentration that promotes skin cell outgrowth from skin explants onto a synthetic dermal substitute. JPRAS Open 2020; 25:8-17. [PMID: 32490127 PMCID: PMC7260611 DOI: 10.1016/j.jpra.2019.12.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Accepted: 12/22/2019] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Our overall objective is to develop a single-stage in-theatre skin replacement by combining small explants of skin with a synthetic biodegradable dermal scaffold. The aim of the current study is to determine the concentration of fibrin constituents and their handling properties for both adhering skin explants to the scaffold and encouraging cellular outgrowth to achieve reepithelialization. METHODS Small skin explants were combined with several concentrations of thrombin (2.5,4.5,and 6.5 I.U) and fibrinogen (18.75,67, and 86.5 mg/ml), cultured in Green's media for 14 days and cellular outgrowth was measured using Rose Bengal staining. They were also cultured on electrospun scaffolds for 14 and 21 days. Hematoxylin and eosin (H&E) staining was undertaken to visualize the interface between skin explants and scaffolds and metabolic activity and collagen production were assessed. RESULTS A thrombin/fibrinogen combination of 2.5 I. U/ml /18.75 mg/ml showed significantly greater cell viability as assessed by Rose Bengal stained areas at days 7 and 14. This was also seen in DAPI images and H&E stains skin explant/scaffold constructs. Fibrin with a concentration of thrombin 2.5 I.U./ml took 5-6 min to set, which is convenient for distributing skin explants on the scaffold. CONCLUSION The study identified concentrations of thrombin (2.5 I.U/ml) and fibrinogen (18.75 mg/ml), which were easy to handle and aided the retention of skin explants and permitted cell outgrowth from explants.
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Affiliation(s)
- Kavita Sharma
- Kroto Research Institute, Department of Materials Science and Engineering, University of Sheffield, North Campus, Broad Lane, Sheffield, S1 7HQ UK
| | - Anthony J. Bullock
- Kroto Research Institute, Department of Materials Science and Engineering, University of Sheffield, North Campus, Broad Lane, Sheffield, S1 7HQ UK
| | - Victoria Giblin
- Kroto Research Institute, Department of Materials Science and Engineering, University of Sheffield, North Campus, Broad Lane, Sheffield, S1 7HQ UK
| | - Sheila MacNeil
- Kroto Research Institute, Department of Materials Science and Engineering, University of Sheffield, North Campus, Broad Lane, Sheffield, S1 7HQ UK
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Beißner N, Bolea Albero A, Füller J, Kellner T, Lauterboeck L, Liang J, Böl M, Glasmacher B, Müller-Goymann CC, Reichl S. Improved in vitro models for preclinical drug and formulation screening focusing on 2D and 3D skin and cornea constructs. Eur J Pharm Biopharm 2018; 126:57-66. [PMID: 29191717 DOI: 10.1016/j.ejpb.2017.11.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Revised: 11/03/2017] [Accepted: 11/26/2017] [Indexed: 01/15/2023]
Abstract
The present overview deals with current approaches for the improvement of in vitro models for preclinical drug and formulation screening which were elaborated in a joint project at the Center of Pharmaceutical Engineering of the TU Braunschweig. Within this project a special focus was laid on the enhancement of skin and cornea models. For this reason, first, a computation-based approach for in silico modeling of dermal cell proliferation and differentiation was developed. The simulation should for example enhance the understanding of the performed 2D in vitro tests on the antiproliferative effect of hyperforin. A second approach aimed at establishing in vivo-like dynamic conditions in in vitro drug absorption studies in contrast to the commonly used static conditions. The reported Dynamic Micro Tissue Engineering System (DynaMiTES) combines the advantages of in vitro cell culture models and microfluidic systems for the emulation of dynamic drug absorption at different physiological barriers and, later, for the investigation of dynamic culture conditions. Finally, cryopreserved shipping was investigated for a human hemicornea construct. As the implementation of a tissue-engineering laboratory is time-consuming and cost-intensive, commercial availability of advanced 3D human tissue is preferred from a variety of companies. However, for shipping purposes cryopreservation is a challenge to maintain the same quality and performance of the tissue in the laboratory of both, the provider and the customer.
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Maver T, Maver U, Kleinschek KS, Raščan IM, Smrke DM. Advanced therapies of skin injuries. Wien Klin Wochenschr 2015; 127 Suppl 5:S187-98. [PMID: 26404739 DOI: 10.1007/s00508-015-0859-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2014] [Accepted: 08/21/2015] [Indexed: 11/24/2022]
Abstract
The loss of tissue is still one of the most challenging problems in healthcare. Efficient laboratory expansion of skin tissue to reproduce the skins barrier function can make the difference between life and death for patients with extensive full-thickness burns, chronic wounds, or genetic disorders such as bullous conditions. This engineering has been initiated based on the acute need in the 1980s and today, tissue-engineered skin is the reality. The human skin equivalents are available not only as models for permeation and toxicity screening, but are frequently applied in vivo as clinical skin substitutes. This review aims to introduce the most important recent development in the extensive field of tissue engineering and to describe already approved, commercially available skin substitutes in clinical use.
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Affiliation(s)
- Tina Maver
- Faculty of Mechanical Engineering, Laboratory for Characterisation and Processing of Polymers, University of Maribor, Smetanova 17, 2000, Maribor, Slovenia
| | - Uroš Maver
- Faculty of Medicine, Department of Pharmacology and Experimental Toxicology, University of Maribor, Taborska ulica 8, 2000, Maribor, Slovenia.
| | - Karin Stana Kleinschek
- Faculty of Mechanical Engineering, Laboratory for Characterisation and Processing of Polymers, University of Maribor, Smetanova 17, 2000, Maribor, Slovenia
| | - Irena Mlinarič Raščan
- Faculty of Pharmacy, University of Ljubljana, Aškerčeva 7, 1000, Ljubljana, Slovenia
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