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Tu CC, Zheng ZC, Cheng NC, Yu J, Tai WC, Pan YX, Chang PC. Alveolar mucosal cell spheroids promote extraction socket healing and osseous defect regeneration. J Periodontol 2024; 95:372-383. [PMID: 37531239 DOI: 10.1002/jper.23-0283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 07/07/2023] [Accepted: 07/30/2023] [Indexed: 08/04/2023]
Abstract
BACKGROUND Alveolar mucosa could be a promising source of mesenchymal stem cells (MSCs) for regeneration therapeutics because it exhibits faster healing potential and can be easily collected with minimal periodontal disturbance. This study aimed to evaluate the potential of alveolar mucosal cell (AMC) spheroids for promoting extraction socket healing and calvarial osseous defect regeneration. METHODS AMCs were isolated from Sprague-Dawley rats. Antigenic and MSC surface marker expressions and trilineage differentiation capability were assessed. AMCs were then osteogenically stimulated (OAs) or unstimulated (UAs), self-aggregated to form spheroids, and encapsulated in gelatin hydrogel to fill rat extraction sockets or combined with freeze-dried bone graft (FDBG) to fill rat calvarial osseous defects. The outcome was assessed by gross observation, micro-CT imaging, and immunohistochemistry. RESULTS AMCs highly expressed MSC surface markers, showed weak antigenicity, and were capable of trilineage differentiation at Passage 3. In the extraction sockets, wound closure, socket fill, keratinization, and proliferative activities were accelerated in those with AMC spheroids treatment. Socket fill and maturation were further promoted by OA spheroids. In the calvarial osseous defects, the mineralized tissue ratio was promoted with AMC spheroids/FDBG treatment, and bone sialoprotein expression and cell proliferation were more evident with OA spheroids/FDBG treatment. CONCLUSION AMCs exhibited MSC properties with weak antigenicity. AMC spheroids promoted extraction socket healing, AMC spheroids/FDBG promoted calvarial osseous defect regeneration, and the outcomes were further enhanced by osteogenically stimulation of AMCs.
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Affiliation(s)
- Che-Chang Tu
- Graduate Institute of Clinical Dentistry, School of Dentistry, College of Medicine, National Taiwan University, Taipei, Taiwan
- Division of Periodontics, Department of Dentistry, National Taiwan University Hospital, Taipei, Taiwan
| | - Zhao-Cheng Zheng
- Graduate Institute of Clinical Dentistry, School of Dentistry, College of Medicine, National Taiwan University, Taipei, Taiwan
- Division of Periodontics, Department of Dentistry, National Taiwan University Hospital, Taipei, Taiwan
| | - Nai-Chen Cheng
- Department of Surgery, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan
| | - Jiashing Yu
- Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei, Taiwan
| | - Wei-Chiu Tai
- Graduate Institute of Clinical Dentistry, School of Dentistry, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Yi-Xuan Pan
- Graduate Institute of Clinical Dentistry, School of Dentistry, College of Medicine, National Taiwan University, Taipei, Taiwan
- Division of Periodontics, Department of Dentistry, National Taiwan University Hospital, Taipei, Taiwan
| | - Po-Chun Chang
- Graduate Institute of Clinical Dentistry, School of Dentistry, College of Medicine, National Taiwan University, Taipei, Taiwan
- Division of Periodontics, Department of Dentistry, National Taiwan University Hospital, Taipei, Taiwan
- School of Dentistry, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
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Chen TM, Wang CH, Chuang CC, Chen CF, Cheng NC. Introduction of 2024 JTSPS for APS Supplement. Ann Plast Surg 2024; 92:S1. [PMID: 38285988 DOI: 10.1097/sap.0000000000003763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2024]
Affiliation(s)
- Tim-Mo Chen
- From the Division of Plastic Surgery, Department of Surgery, Tri-Service General Hospital, National Defense Medical Center, Taipei
| | - Chih-Hsing Wang
- From the Division of Plastic Surgery, Department of Surgery, Tri-Service General Hospital, National Defense Medical Center, Taipei
| | - Chwei-Chin Chuang
- Department of Plastic Surgery, Chang Gung Memorial Hospital, Taipei Linkou
| | - Chieh-Feng Chen
- Division of Plastic Surgery, Department of Surgery, Taipei Municipal Wanfang Hospital
| | - Nai-Chen Cheng
- Division of Plastic Surgery, Department of Surgery, National Taiwan University Hospital, Taipei, Taiwan
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Wu YW, Wang CY, Cheng NC, Lin HJ, Huang HL, Huang JH, Chen CC, Lee JK, Chen PL, Hsu PC, Wu IH, Yeh JT, Tsai HY, Tzeng YS, Cheng CC, Lin CH, Wu SH, Tan JWH, Wu CH, Hsueh SK, Chang CH, Wu HP, Hsu CH, Yen HT, Lin PC, Lin CH, Tai HC, Chen WJ. 2024 TSOC/TSPS Joint Consensus: Strategies for Advanced Vascular Wound Management in Arterial and Venous Diseases. Acta Cardiol Sin 2024; 40:1-44. [PMID: 38264067 PMCID: PMC10801419 DOI: 10.6515/acs.202401_40(1).20231220a] [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] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Accepted: 12/20/2023] [Indexed: 01/25/2024]
Abstract
The Taiwan Society of Cardiology (TSOC) and Taiwan Society of Plastic Surgery (TSPS) have collaborated to develop a joint consensus for the management of patients with advanced vascular wounds. The taskforce comprises experts including preventive cardiologists, interventionists, and cardiovascular and plastic surgeons. The consensus focuses on addressing the challenges in diagnosing, treating, and managing complex wounds; incorporates the perfusion evaluation and the advanced vascular wound care team; and highlights the importance of cross-disciplinary teamwork. The aim of this joint consensus is to manage patients with advanced vascular wounds and encourage the adoption of these guidelines by healthcare professionals to improve patient care and outcomes. The guidelines encompass a range of topics, including the definition of advanced vascular wounds, increased awareness, team structure, epidemiology, clinical presentation, medical treatment, endovascular intervention, vascular surgery, infection control, advanced wound management, and evaluation of treatment results. It also outlines a detailed protocol for assessing patients with lower leg wounds, provides guidance on consultation and referral processes, and offers recommendations for various wound care devices, dressings, and products. The 2024 TSOC/TSPS consensus for the management of patients with advanced vascular wounds serves as a catalyst for international collaboration, promoting knowledge exchange and facilitating advancements in the field of advanced vascular wound management. By providing a comprehensive and evidence-based approach, this consensus aims to contribute to improved patient care and outcomes globally.
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Affiliation(s)
- Yen-Wen Wu
- Division of Cardiology, Cardiovascular Medical Center, and Department of Nuclear Medicine, Far Eastern Memorial Hospital, New Taipei City
- School of Medicine, National Yang Ming Chiao Tung University, Taipei
- Graduate Institute of Medicine, Yuan Ze University
| | - Chao-Yung Wang
- Division of Cardiology, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Taoyuan
- Institute of Cellular and System Medicine, National Health Research Institute, Zhunan
| | - Nai-Chen Cheng
- Division of Plastic Surgery, Department of Surgery, National Taiwan University Hospital and College of Medicine
| | - Hung-Ju Lin
- Division of Cardiology, Department of Internal Medicine
- Cardiovascular Center, National Taiwan University Hospital, Taipei
| | - Hsuan-Li Huang
- Division of Cardiology, Department of Internal Medicine, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei City
- School of Post-Baccalaureate Chinese Medicine, Tzu Chi University, Hualien
| | - Jih-Hsin Huang
- Division of Cardiovascular Surgery, Cardiovascular Center, Far Eastern Memorial Hospital, New Taipei City
| | - Chun-Chi Chen
- Division of Cardiology, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Taoyuan
| | - Jen-Kuang Lee
- Division of Plastic Surgery, Department of Surgery, National Taiwan University Hospital and College of Medicine
- Division of Cardiology, Department of Internal Medicine
- Department of Internal Medicine
- Department of Laboratory Medicine, National Taiwan University College of Medicine
- Telehealth Center, National Taiwan University Hospital, Taipei
| | - Po-Lin Chen
- School of Medicine, National Yang Ming Chiao Tung University, Taipei
- Division of Cardiovascular Surgery, Department of Surgery, En Chu Kong Hospital, New Taipei City
- Division of Cardiovascular Surgery, Department of Surgery, Taipei Veterans General Hospital, Taipei
| | - Po-Chao Hsu
- Division of Cardiology, Department of Internal Medicine, Kaohsiung Medical University Hospital
- Faculty of Medicine, Kaohsiung Medical University, Kaohsiung
| | - I-Hui Wu
- Department of Cardiovascular Surgery, National Taiwan University Hospital, College of Medicine, National Taiwan University
- Graduate Institute of Clinical Medicine, College of Medicine, National Taiwan University
- Department of Trauma Surgery, National Taiwan University Hospital, Taipei
| | - Jiun-Ting Yeh
- Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital, Chang Gung Medical College and Chang Gung University, Taoyuan
| | - Hao-Yuan Tsai
- Division of Cardiology, Cardiovascular Medical Center, Far Eastern Memorial Hospital, New Taipei City
| | - Yuan-Sheng Tzeng
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Tri-Service General Hospital, National Defense Medical Center, Taipei
- Department of Surgery, Zuoying Armed Forces General Hospital, Kaohsiung
| | - Cheng-Chung Cheng
- Division of Cardiology, Department of Internal Medicine, Tri-Service General Hospital, National Defense Medical Center
| | - Chia-Hsun Lin
- Division of Cardiovascular Surgery, Department of Surgery, Shin Kong Wu Ho-Su Memorial Hospital
| | - Szu-Hsien Wu
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Taipei Veterans General Hospital
- Department of Surgery, School of Medicine, National Yang Ming Chiao Tung University, Taipei
| | - Jimmy Wei Hwa Tan
- Department of Cardiovascular Surgery, An-Nan Hospital, China Medical University, Tainan
| | - Cheng-Hsueh Wu
- School of Medicine, National Yang Ming Chiao Tung University, Taipei
- Department of Critical Care Medicine, Taipei Veterans General Hospital, Taipei
| | - Shu-Kai Hsueh
- Division of Cardiology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung
| | - Chien-Hwa Chang
- Division of Cardiovascular Surgery, Dalin Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Chiayi County
| | - Hsu-Ping Wu
- Cardiovascular Center, MacKay Memorial Hospital, Taipei
| | - Chung-Ho Hsu
- Section of Peripheral Artery Disease, Division of Cardiology, Department of Internal Medicine, China Medical University Hospital, Taichung
| | - Hsu-Ting Yen
- Division of Thoracic and Cardiovascular Surgery, Department of Surgery, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung
| | - Po-Chang Lin
- Department of Internal Medicine, China Medical University Hospital, Taichung
| | - Chih-Hung Lin
- Department of Plastic Reconstructive Surgery, Chang Gung University of Science and Technology, Taoyuan
| | - Hao-Chih Tai
- Institute of Cellular and System Medicine, National Health Research Institute, Zhunan
| | - Wen-Jone Chen
- Division of Plastic Surgery, Department of Surgery, National Taiwan University Hospital and College of Medicine
- Division of Cardiology, Department of Internal Medicine
- Department of Emergency Medicine, National Taiwan University College of Medicine and Hospital, Taipei
- Min-Sheng General Hospital, Taoyuan, Taiwan
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Cheng NC, Chen YH, Wu YL, Chang YT. Transaxillary endoscopic subfascial operation for persistent muscular torticollis in pediatric patients: A 13-year retrospective study in Taiwan. Pediatr Neonatol 2023:S1875-9572(23)00209-7. [PMID: 38453564 DOI: 10.1016/j.pedneo.2023.06.010] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 05/30/2023] [Accepted: 06/07/2023] [Indexed: 03/09/2024] Open
Abstract
BACKGROUND The endoscopic surgery for persistent muscular torticollis has been well-described and most are subcutaneous working caverns. As the sternocleidomastoid muscle is located beneath the deep cervical fascia that corresponds to the pectoral fascia, this study aimed to review our results of the transaxillary approach under the pectoral fascia and the deep cervical fascia. METHODS Between November 2009 and January 2022, pediatric patients with persistent muscular torticollis receiving transaxillary endoscopic subfascial operation were retrospectively reviewed and analyzed. RESULTS There were thirty-three consecutive patients with median age of 6.5 years (range, 5.5 months-15.7 years). The median operating time was 90.0 min. With a median follow-up of 14.8 months (range, 5.0-127.7), the final outcomes showed excellent-to-good results in 90.9%, fair results in 6.1%, and poor results in 3.0%. Univariate analysis revealed that the long-term outcomes of the operation were independent of gender, age, involved side and previously open myotomy (p = 0.662, 0.818, 0.740 and 0.596, respectively). CONCLUSIONS The subfascial working cavern would be technically achievable for the transaxillary endoscopic approach with good functional and cosmetic outcomes.
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Affiliation(s)
- Nai-Chen Cheng
- Division of Pediatric Surgery, Department of Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Yu-Han Chen
- Division of Pediatric Surgery, Department of Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Yu-Ling Wu
- Division of Pediatric Surgery, Department of Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Yu-Tang Chang
- Division of Pediatric Surgery, Department of Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan.
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Li CW, Young TH, Wang MH, Pei MY, Hsieh TY, Hsu CL, Cheng NC. Low-glucose culture environment can enhance the wound healing capability of diabetic adipose-derived stem cells. Stem Cell Res Ther 2023; 14:236. [PMID: 37667384 PMCID: PMC10478288 DOI: 10.1186/s13287-023-03478-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Accepted: 08/29/2023] [Indexed: 09/06/2023] Open
Abstract
BACKGROUND Application of autologous adipose-derived stem cells (ASC) for diabetic chronic wounds has become an emerging treatment option. However, ASCs from diabetic individuals showed impaired cell function and suboptimal wound healing effects. We proposed that adopting a low-glucose level in the culture medium for diabetic ASCs may restore their pro-healing capabilities. METHODS ASCs from diabetic humans and mice were retrieved and cultured in high-glucose (HG, 4.5 g/L) or low-glucose (LG, 1.0 g/L) conditions. Cell characteristics and functions were investigated in vitro. Moreover, we applied diabetic murine ASCs cultured in HG or LG condition to a wound healing model in diabetic mice to compare their healing capabilities in vivo. RESULTS Human ASCs exhibited decreased cell proliferation and migration with enhanced senescence when cultured in HG condition in vitro. Similar findings were noted in ASCs derived from diabetic mice. The inferior cellular functions could be partially recovered when they were cultured in LG condition. In the animal study, wounds healed faster when treated with HG- or LG-cultured diabetic ASCs relative to the control group. Moreover, higher collagen density, more angiogenesis and cellular retention of applied ASCs were found in wound tissues treated with diabetic ASCs cultured in LG condition. CONCLUSIONS In line with the literature, our study showed that a diabetic milieu exerts an adverse effect on ASCs. Adopting LG culture condition is a simple and effective approach to enhance the wound healing capabilities of diabetic ASCs, which is valuable for the clinical application of autologous ASCs from diabetic patients.
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Affiliation(s)
- Chun-Wei Li
- Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital at Keelung, Chang Gung University and College of Medicine, Keelung, Taiwan
| | - Tai-Horng Young
- Department of Biomedical Engineering, College of Medicine and College of Engineering, National Taiwan University, Taipei, Taiwan
| | - Mu-Hui Wang
- Department of Surgery, National Taiwan University Hospital and College of Medicine, 7 Chung-Shan S. Rd., Taipei, 100, Taiwan
| | - Ming-Ying Pei
- Department of Biomedical Engineering, College of Medicine and College of Engineering, National Taiwan University, Taipei, Taiwan
| | - Tsung-Yu Hsieh
- Department of Biomedical Engineering, College of Medicine and College of Engineering, National Taiwan University, Taipei, Taiwan
| | - Chia-Lang Hsu
- Department of Medical Research, National Taiwan University Hospital, Taipei, Taiwan
| | - Nai-Chen Cheng
- Department of Surgery, National Taiwan University Hospital and College of Medicine, 7 Chung-Shan S. Rd., Taipei, 100, Taiwan.
- Research Center for Developmental Biology and Regenerative Medicine, National Taiwan University, Taipei, Taiwan.
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Liu CT, Yu J, Lin MH, Chang KH, Lin CY, Cheng NC, Wu PI, Huang CW, Zhang PY, Hung MT, Hsiao YS. Biophysical Electrical and Mechanical Stimulations for Promoting Chondrogenesis of Stem Cells on PEDOT:PSS Conductive Polymer Scaffolds. Biomacromolecules 2023; 24:3858-3871. [PMID: 37523499 DOI: 10.1021/acs.biomac.3c00506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2023]
Abstract
The investigation of the effects of electrical and mechanical stimulations on chondrogenesis in tissue engineering scaffolds is essential for realizing successful cartilage repair and regeneration. The aim of articular cartilage tissue engineering is to enhance the function of damaged or diseased articular cartilage, which has limited regenerative capacity. Studies have shown that electrical stimulation (ES) promotes mesenchymal stem cell (MSC) chondrogenesis, while mechanical stimulation (MS) enhances the chondrogenic differentiation capacity of MSCs. Therefore, understanding the impact of these stimuli on chondrogenesis is crucial for researchers to develop more effective tissue engineering strategies for cartilage repair and regeneration. This study focuses on the preparation of poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) conductive polymer (CP) scaffolds using the freeze-drying method. The scaffolds were fabricated with varying concentrations (0, 1, 3, and 10 wt %) of (3-glycidyloxypropyl) trimethoxysilane (GOPS) as a crosslinker and an additive to tailor the scaffold properties. To gain a comprehensive understanding of the material characteristics and the phase aggregation phenomenon of PEDOT:PSS scaffolds, the researchers performed theoretical calculations of solubility parameters and surface energies of PSS, PSS-GOPS, and PEDOT polymers, as well as conducted material analyses. Additionally, the study investigated the potential of promoting chondrogenic differentiation of human adipose stem cells by applying external ES or MS on a PEDOT:PSS CP scaffold. Compared to the group without stimulation, the group that underwent stimulation exhibited significantly up-regulated expression levels of chondrogenic characteristic genes, such as SOX9 and COL2A1. Moreover, the immunofluorescence staining images exhibited a more vigorous fluorescence intensity of SOX9 and COL II proteins that was consistent with the trend of the gene expression results. In the MS experiment, the strain excitation exerted on the scaffold was simulated and transformed into stress. The simulated stress response showed that the peak gradually decreased with time and approached a constant value, with the negative value of stress representing the generation of tensile stress. This stress response quantification could aid researchers in determining specific MS conditions for various materials in tissue engineering, and the applied stress conditions could be further optimized. Overall, these findings are significant contributions to future research on cartilage repair and biophysical ES/MS in tissue engineering.
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Affiliation(s)
- Chun-Ting Liu
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
- Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Jiashing Yu
- Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Min-Hsuan Lin
- Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Kai-Hsiang Chang
- Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Che-Yu Lin
- Institute of Applied Mechanics, College of Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Nai-Chen Cheng
- Department of Surgery, National Taiwan University Hospital and College of Medicine, Taipei 10002, Taiwan
| | - Po-I Wu
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
| | - Chun-Wei Huang
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
| | - Pin-Yu Zhang
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
| | - Min-Tzu Hung
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
| | - Yu-Sheng Hsiao
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
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Cheng NC, Cheng Y, Tai HC, Chien KL, Wang SH, Chen YH, Fang CT, Hsueh PR. High Mortality Risk of Type III Monomicrobial Gram-Negative Necrotizing Fasciitis: the Role of Extraintestinal Pathogenic Escherichia coli (ExPEC) and Klebsiella pneumoniae. Int J Infect Dis 2023; 132:64-71. [PMID: 37059297 DOI: 10.1016/j.ijid.2023.04.390] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [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: 10/13/2022] [Revised: 04/02/2023] [Accepted: 04/08/2023] [Indexed: 04/16/2023] Open
Abstract
OBJECTIVES The aim of this study was to investigate the prognostic value of reclassified new type III monomicrobial gram-negative necrotizing fasciitis (NF) and the microbial factors associated with an increased risk of mortality. METHODS This study included 235 NF cases treated at National Taiwan University Hospital. We compared the mortality risk of NF caused by different causal microorganisms and examined the bacterial virulence genes profile and antimicrobial susceptibility pattern associated with an increase in mortality risk. RESULTS Type III NF (n=68) had a mortality risk 2-fold higher than type I (polymicrobial, n=64) or type II (monomicrobial gram-positive, n=79) NF (42.6% vs. 23.4% or 19.0%, P= 0.019 and 0.002, respectively). Mortality differed by causal microorganism (Escherichia coli [61.5%], Klebsiella pneumoniae [40.0%], Aeromonas hydrophila [37.5%], Vibrio vulnificus [25.0%], polymicrobial [23.4%], group A streptococci [16.7%], and Staphylococcus aureus [16.2%], in decreasing rank, P < 0.001). Type III NF caused by E. coli, identified as extra-intestinal pathogenic E. coli (ExPEC) via virulence gene analyses, was associated with a particularly high mortality risk (adjusted odds ratio: 6.51, P = 0.003) after adjusting for age and comorbidities. Some (38.5%/7.7%) of the E. coli strains were non-susceptible to third/fourth-generation cephalosporins but remained susceptible to carbapenems. CONCLUSION Type III NF, especially cases caused by E. coli or K. pneumoniae, are associated with a comparatively high mortality risk than type I or type II NF. Wound gram stain-based rapid diagnosis of type III NF may inform empirical antimicrobial therapy to include a carbapenem.
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Affiliation(s)
- Nai-Chen Cheng
- Department of Surgery, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Yin Cheng
- Department of Surgery, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Hao-Chih Tai
- Department of Surgery, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Kuo-Liong Chien
- Department of Internal Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan; Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan
| | - Szu-Hui Wang
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan
| | - Yi-Hsuan Chen
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan; Taiwan Centers for Disease Control, Taipei, Taiwan
| | - Chi-Tai Fang
- Department of Internal Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan; Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan.
| | - Po-Ren Hsueh
- Department of Internal Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan; Department of Laboratory Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan; Departments of Laboratory Medicine and Internal Medicine, China Medical University Hospital, Taichung, Taiwan; School of Medicine, China Medical University, Taichung, Taiwan
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Wang HJ, Chuang CC, Chen SG, Chen CF, Cheng NC. Introduction of 2023 JTSPS for APS Supplement. Ann Plast Surg 2023; 90:S1. [PMID: 37740507 DOI: 10.1097/sap.0000000000003347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/21/2023]
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Chen WX, Cheng NC, Chen YJ, Lee IC. Characterization of silk fibroin-based microneedles and in vitro study of stromal cell-derived factor-1-loaded microneedles on adipose stem cell recruitment. Int J Biol Macromol 2023; 233:123537. [PMID: 36740118 DOI: 10.1016/j.ijbiomac.2023.123537] [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: 11/09/2022] [Revised: 01/17/2023] [Accepted: 01/31/2023] [Indexed: 02/05/2023]
Abstract
Silk fibroin (SF) has good biocompatibility, degradability and mechanical properties. In this study, SF-based microneedle (MN) patches were fabricated as stromal cell-derived factor-1 (SDF-1) carriers that may be used for adipose stem cell (ASC) recruitment. Therefore, SF was chosen as the main MN material to achieve sustained drug release. In addition, the variations in SF-based MN crystallinity after water annealing treatment were also determined. The results indicated that SF-based MN patches were successfully fabricated with a 3M™ commercial template and Polydimethylsiloxane mold. Through optical coherence tomography, it was found that all of the SF-based MN patches prepared in this study had sufficient strength to penetrate the skin to a depth of approximately 400 μm. Sustained release of the model drug-dextran from the SF-based MNs was demonstrated. Although SF-based MNs release SDF-1 in a sustained manner, the quantity released can be regulated and improved. Subsequently, dual-layer SDF-1-loaded MNs fabricated with a gelatin tip and SF body were prepared to enhance SDF-1 release for ASC recruitment. SF-based MNs can show good penetration ability and provide good sustained release while dual-layer MNs can regulate the amount of drug released, which could present an alternative for stem cell therapy.
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Affiliation(s)
- Wu-Xun Chen
- Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, Hsinchu, Taiwan
| | - Nai-Chen Cheng
- Department of Surgery, National Taiwan University Hospital and College of Medicine, 7 Chung-Shan S Rd, Taipei 100, Taiwan
| | - Yan-Jun Chen
- Graduate Institute of Biomedical Engineering, Chang Gung University, Taoyuan, Taiwan
| | - I-Chi Lee
- Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, Hsinchu, Taiwan.
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Tu CC, Cheng NC, Yu J, Pan YX, Tai WC, Chen YC, Chang PC. Adipose-derived stem cell spheroid-laden microbial transglutaminase cross-linked gelatin hydrogel for treating diabetic periodontal wounds and craniofacial defects. Stem Cell Res Ther 2023; 14:20. [PMID: 36737813 PMCID: PMC9898981 DOI: 10.1186/s13287-023-03238-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Accepted: 01/10/2023] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Diabetes mellitus deteriorates the destruction and impairs the healing of periodontal wounds and craniofacial defects. This study is to evaluate the potential of self-assembled adipose-derived stem cell spheroids (ADsp) in microbial transglutaminase cross-linked gelatin hydrogel (mTG) for treating diabetic periodontal wounds and craniofacial defects. METHODS Human adipose-derived stem cells (ADSCs) were isolated by lipoaspiration, pluripotent genes and trilineage differentiation were examined, and the maintenance of ADsp properties in mTG was verified. Oral mucosal wounds and calvarial osseous defects were created in diabetic rats. Gross observation, histologic evaluation, and immunohistochemistry for proliferating cells and keratinization were conducted in the mucosal wounds within 4-28 days. Micro-CT imaging, histologic evaluation, and immunohistochemistry for proliferating cells and osteogenic differentiation were conducted in the osseous defects at 7 and 28 days. RESULTS ADSCs expressed pluripotent genes and were capable of trilineage differentiation. ADsp retained morphology and stemness in mTG. In diabetic mucosal wounds, wound closure, epithelization, and keratinization were accelerated in those with ADsp and ADsp-mTG. In diabetic osseous defects, osteogenic differentiation markers were evidently expressed, cell proliferation was promoted from day 7, and bone formation was significantly promoted at day 28 in those with osteogenically pretreated ADsp-mTG. CONCLUSIONS ADsp-mTG accelerated diabetic oral mucosal wound healing, and osteogenically pretreated ADsp-mTG promoted diabetic osseous defect regeneration, proving that ADsp-mTG facilitated diabetic periodontal wound healing and craniofacial osseous defect regeneration.
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Affiliation(s)
- Che-Chang Tu
- grid.19188.390000 0004 0546 0241Graduate Institute of Clinical Dentistry, School of Dentistry, College of Medicine, National Taiwan University, Taipei, Taiwan ,grid.412094.a0000 0004 0572 7815Division of Periodontics, Department of Dentistry, National Taiwan University Hospital, Taipei, Taiwan
| | - Nai-Chen Cheng
- grid.412094.a0000 0004 0572 7815Department of Surgery, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan
| | - Jiashing Yu
- grid.19188.390000 0004 0546 0241Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei, Taiwan
| | - Yi-Xuan Pan
- grid.412094.a0000 0004 0572 7815Division of Periodontics, Department of Dentistry, National Taiwan University Hospital, Taipei, Taiwan ,grid.412094.a0000 0004 0572 7815Department of Surgery, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan
| | - Wei-Chiu Tai
- grid.19188.390000 0004 0546 0241Graduate Institute of Clinical Dentistry, School of Dentistry, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Yin-Chuan Chen
- grid.19188.390000 0004 0546 0241Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei, Taiwan
| | - Po-Chun Chang
- Graduate Institute of Clinical Dentistry, School of Dentistry, College of Medicine, National Taiwan University, Taipei, Taiwan. .,Division of Periodontics, Department of Dentistry, National Taiwan University Hospital, Taipei, Taiwan. .,School of Dentistry, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.
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Yu J, Hsu YC, Lee JK, Cheng NC. Enhanced angiogenic potential of adipose-derived stem cell sheets by integration with cell spheroids of the same source. Stem Cell Res Ther 2022; 13:276. [PMID: 35765015 PMCID: PMC9241243 DOI: 10.1186/s13287-022-02948-3] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Accepted: 06/09/2022] [Indexed: 11/24/2022] Open
Abstract
Background Adipose-derived stem cell (ASC) has been considered as a desirable source for cell therapy. In contrast to combining scaffold materials with cells, ASCs can be fabricated into scaffold-free three-dimensional (3D) constructs to promote regeneration at tissue level. However, previous reports have found decreased expression of vascular endothelial growth factor (VEGF) in ASC sheets. In this study, we aimed to integrate ASC spheroids into ASC sheets to enhance the angiogenic capability of cell sheets. Methods ASCs were seeded in agarose microwells to generate uniform cell spheroids with adjustable size, while extracellular matrix deposition could be stimulated by ascorbic acid 2-phosphate to form ASC sheets. RNA sequencing was performed to identify the transcriptomic profiles of ASC spheroids and sheets relative to monolayer ASCs. By transferring ASC spheroids onto ASC sheets, the spheroid sheet composites could be successfully fabricated after a short-term co-culture, and their angiogenic potential was evaluated in vitro and in ovo. Results RNA sequencing analysis revealed that upregulation of angiogenesis-related genes was found only in ASC spheroids. The stimulating effect of spheroid formation on ASCs toward endothelial lineage was demonstrated by enhanced CD31 expression, which maintained after ASC spheroids were seeded on cell sheets. Relative to ASC sheets, enhanced expression of VEGF and hepatocyte growth factor was also noted in ASC spheroid sheets, and conditioned medium of ASC spheroid sheets significantly enhanced tube formation of endothelial cells in vitro. Moreover, chick embryo chorioallantoic membrane assay showed a significantly higher capillary density with more branch points after applying ASC spheroid sheets, and immunohistochemistry also revealed a significantly higher ratio of CD31-positive area. Conclusion In the spheroid sheet construct, ASC spheroids can augment the pro-angiogenesis capability of ASC sheets without the use of exogenous biomaterial or genetic manipulation. The strategy of this composite system holds promise as an advance in 3D culture technique of ASCs for future application in angiogenesis and regeneration therapies. Supplementary Information The online version contains supplementary material available at 10.1186/s13287-022-02948-3.
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Affiliation(s)
- Jiashing Yu
- Department of Chemical Engineering, College of Engineering, National Taiwan University, 1 Sec. 4, Roosevelt Rd., Taipei 106, Taiwan
| | - Yi-Chiung Hsu
- Department of Biomedical Sciences and Engineering, National Central University, 300 Zhongda Rd., Taoyuan 320, Taiwan
| | - Jen-Kuang Lee
- Department of Medicine, National Taiwan University Hospital and College of Medicine, 7 Chung-Shan S. Rd., Taipei 100, Taiwan
| | - Nai-Chen Cheng
- Department of Surgery, National Taiwan University Hospital and College of Medicine, 7 Chung-Shan S. Rd., Taipei 100, Taiwan.
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Nguyen TT, Hu CC, Sakthivel R, Nabilla SC, Huang YW, Yu J, Cheng NC, Kuo YJ, Chung RJ. Preparation of gamma poly-glutamic acid/hydroxyapatite/collagen composite as the 3D-printing scaffold for bone tissue engineering. Biomater Res 2022; 26:21. [PMID: 35642070 PMCID: PMC9158383 DOI: 10.1186/s40824-022-00265-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Accepted: 05/02/2022] [Indexed: 11/19/2022] Open
Abstract
Background All types of movements involve the role of articular cartilage and bones. The presence of cartilage enables bones to move over one another smoothly. However, repetitive microtrauma and ischemia as well as genetic effects can cause an osteochondral lesion. Numerous treatment methods such as microfracture surgergy, autograft, and allograft, have been used, however, it possesses treatment challenges including prolonged recovery time after surgery and poses a financial burden on patients. Nowadays, various tissue engineering approaches have been developed to repair bone and osteochondral defects using biomaterial implants to induce the regeneration of stem cells. Methods In this study, a collagen (Col)/γ-polyglutamate acid (PGA)/hydroxyapatite (HA) composite scaffold was fabricated using a 3D printing technique. A Col/γ-PGA/HA 2D membrane was also fabricated for comparison. The scaffolds (four layers) were designed with the size of 8 mm in diameter and 1.2 mm in thickness. The first layer was HA/γ-PGA and the second to fourth layers were Col/γ-PGA. In addition, a 2D membrane was constructed from hydroxyapatite/γ-PGA and collagen/γ-PGA with a ratio of 1:3. The biocompatibility property and degradation activity were investigated for both scaffold and membrane samples. Rat bone marrow mesenchymal stem cells (rBMSCs) and human adipose-derived stem cells (hADSCs) were cultured on the samples and were tested in-vitro to evaluate cell attachment, proliferation, and differentiation. In-vivo experiments were performed in the rat and nude mice models. Results In-vitro and in-vivo results show that the developed scaffold is of well biodegradation and biocompatible properties, and the Col-HA scaffold enhances the mechanical properties for osteochondrogenesis in both in-vitro and animal trials. Conclusions The composite would be a great biomaterial application for bone and osteochondral regeneration.
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Wu YF, Lin YC, Yang HW, Cheng NC, Cheng CM. Point-of-Care Wound Blotting with Alcian Blue Grading versus Fluorescence Imaging for Biofilm Detection and Predicting 90-Day Healing Outcomes. Biomedicines 2022; 10:biomedicines10051200. [PMID: 35625936 PMCID: PMC9138671 DOI: 10.3390/biomedicines10051200] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 05/19/2022] [Accepted: 05/20/2022] [Indexed: 11/16/2022] Open
Abstract
Biofilm infection has been identified as a crucial factor of the pathogenesis of chronic wound, but wound biofilm diagnosis remains as an unmet clinical need. We previously proposed a modified wound blotting technique using Alcian blue staining for biofilm detection that was characterized as being non-invasive, time-saving, non-expansive, and informative for biofilm distribution. In this study, we adapted a novel Alcian blue grading method as the severity of biofilm infection for the wound blotting technique and compared its biofilm detection efficacy with MolecuLight i:X- a point-of-care florescence imaging device to detect bacteria and biofilm in wounds. Moreover, their predictive value of complete wound healing at 90 days was analyzed. When validated with wound culture results in the 53 enrolled subjects with chronic wounds, the modified wound blotting method showed a strong association with wound culture, while MolecuLight i:X only exhibited a weak association. In predicting 90-day wound outcomes, the modified wound blotting method showed a strong association (Kendall’s tau value = 0.563, p < 0.001), and the wound culture showed a moderate association (Spearman’s rho = 0.535, p < 0.001), but MolecuLight i:X exhibited no significant association (p = 0.184). In this study, modified wound blotting with the Alcian blue grading method showed superior value to MolecuLight i:X both in biofilm detection and predictive validity in 90-day wound-healing outcomes.
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Affiliation(s)
- Yu-Feng Wu
- Division of Plastic Surgery, Department of Surgery, National Taiwan University Hospital, Hsin-Chu Branch, Hsinchu 300, Taiwan;
- Institute of Biomedical Engineering, National Tsing Hua University, Hsinchu 300, Taiwan;
| | - Yu-Chen Lin
- Institute of Biomedical Engineering, National Tsing Hua University, Hsinchu 300, Taiwan;
| | - Hung-Wei Yang
- Division of Plastic Surgery, Department of Surgery, National Taiwan University Hospital, Biomedical Park Branch, Zhubei City 302, Taiwan;
| | - Nai-Chen Cheng
- Division of Plastic Surgery, Department of Surgery, National Taiwan University Hospital and College of Medicine, Taipei 100, Taiwan
- Correspondence: (N.-C.C.); (C.-M.C.)
| | - Chao-Min Cheng
- Institute of Biomedical Engineering, National Tsing Hua University, Hsinchu 300, Taiwan;
- Correspondence: (N.-C.C.); (C.-M.C.)
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Yu KF, Lu TY, Li YCE, Teng KC, Chen YC, Wei Y, Lin TE, Cheng NC, Yu J. Design and Synthesis of Stem Cell-Laden Keratin/Glycol Chitosan Methacrylate Bioinks for 3D Bioprinting. Biomacromolecules 2022; 23:2814-2826. [PMID: 35438970 DOI: 10.1021/acs.biomac.2c00191] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
With the advancements in tissue engineering and three-dimensional (3D) bioprinting, physiologically relevant three-dimensional structures with suitable mechanical and bioactive properties that mimic the biological tissue can be designed and fabricated. However, the available bioinks are less than demanded. In this research, the readily available biomass sources, keratin and glycol chitosan, were selected to develop a UV-curable hydrogel that is feasible for the 3D bioprinting process. Keratin methacrylate and glycol chitosan methacrylate were synthesized, and a hybrid bioink was created by combining this protein-polysaccharide cross-linked hydrogel. While human hair keratin could provide biological functions, the other composition, glycol chitosan, could further enhance the mechanical strength of the construct. The mechanical properties, degradation profile, swelling behavior, cell viability, and proliferation were investigated with various ratios of keratin methacrylate to glycol chitosan methacrylate. The composition of 2% (w/v) keratin methacrylate and 2% (w/v) chitosan methacrylate showed a significantly higher cell number and swelling percentage than other compositions and was designated as the bioink for 3D printing afterward. The feasibility of stem cell loading in the selected formula was examined with an extrusion-based bioprinter. The cells and spheroids can be successfully printed with the synthesized bioink into a specific shape and cultured. This work provides a potential option for bioinks and delivers insights into personalization research on stem cell-laden biofabricated hydrogels in the future.
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Affiliation(s)
- Kai-Fu Yu
- Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei 106, Taiwan
| | - Ting-Yu Lu
- Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei 106, Taiwan.,Materials Science and Engineering Program, University of California, San Diego La Jolla, California 92093, United States
| | - Yi-Chen Ethan Li
- Department of Chemical Engineering, Feng Chia University, Taichung 407, Taiwan
| | - Kuang-Chih Teng
- Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei 106, Taiwan
| | - Yin-Chuan Chen
- Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei 106, Taiwan
| | - Yang Wei
- Department of Chemical Engineering & Biotechnology, National Taipei University of Technology, Taipei 106, Taiwan
| | - Tzu-En Lin
- Department of Electronics and Electrical Engineering, National Yang-Ming Chiao Tung University, Hsinchu 300, Taiwan
| | - Nai-Chen Cheng
- Department of Surgery, National Taiwan University Hospital, Taipei City 100, Taiwan
| | - Jiashing Yu
- Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei 106, Taiwan
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Chiang YC, Yeh HW, Hu SM, Wu CY, Wu TY, Chen CH, Liao PC, Guan ZY, Cheng NC, Chen HY. Vapor construction and modification of stem cell-laden multicomponent scaffolds for regenerative therapeutics. Mater Today Bio 2022; 13:100213. [PMID: 35198961 PMCID: PMC8850674 DOI: 10.1016/j.mtbio.2022.100213] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Revised: 01/27/2022] [Accepted: 02/04/2022] [Indexed: 01/08/2023]
Abstract
Tissue engineering based on the combined use of isolated cells, scaffolds, and growth factors is widely used; however, the manufacture of cell-preloaded scaffolds faces challenges. Herein, we fabricated a multicomponent scaffold with multiple component accommodations, including bioactive molecules (BMs), such as fibroblast growth factor-2 (FGF-2) and l-ascorbic acid 2-phosphate (A2-P), and living cells of human adipose-derived stem cells (hASCs), within one scaffold construct. We report an innovative fabrication process based on vapor-phased construction using iced templates for vapor sublimation. Simultaneously, the vaporized water molecules were replaced by vapor deposition of poly-p-xylylene (PPX, USP Class VI, highly compatible polymer, FDA-approved records), forming a three-dimensional and porous scaffold matrix. More importantly, a multicomponent modification was achieved based on using nonvolatile solutes, including bioactive molecules of FGF-2 and A2-P, and living cells of hASCs, to prepare iced templates for sublimation. Additionally, the fabrication and construction resulted in a multicomponent scaffold product comprising the devised molecules, cells, and vapor-polymerized poly-p-xylylene as the scaffold matrix. The clean and dry fabrication process did not require catalysts, initiators or plasticizers, and potentially harmful solvents, and the scaffold products were produced in simple steps within hours of the processing time. Cell viability analysis showed a high survival rate (approximately 86.4%) for the accommodated hASCs in the fabricated scaffold product, and a surprising multilineage differentiation potential of hASCs was highly upregulated because of synergistic guidance by the same accommodated FGF-2 and A2-P components. Proliferation and self-renewal activities were also demonstrated with enhancement of the multicomponent scaffold product. Finally, in vivo calvarial defect studies further revealed that the constructed scaffolds provided blood vessels to grow into the bone defect areas with enhancement, and the induced conduction of osteoblast growth also promoted bone healing toward osseointegration. The reported scaffold construction technology represents a prospective tissue engineering scaffold product to enable accommodable and customizable versatility to control the distribution and composition of loading delicate BMs and living hASCs in one scaffold construct and demonstrates unlimited applications in tissue engineering repair and regenerative medicine applications.
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Affiliation(s)
- Yu-Chih Chiang
- School of Dentistry, Graduate Institute of Clinical Dentistry, National Taiwan University and National Taiwan University Hospital, Taipei, 10048, Taiwan
- Molecular Imaging Center, National Taiwan University, Taipei, 10617, Taiwan
- School of Dentistry, Colleage of Dental Medicine, Kaohsiung Medical University, Kaohsiung, 80708, Taiwan
| | - Hsiao-Wen Yeh
- School of Dentistry, Graduate Institute of Clinical Dentistry, National Taiwan University and National Taiwan University Hospital, Taipei, 10048, Taiwan
- Department of Dentistry, Tri-Service General Hospital, National Defense Medical Center, Taipei, 11490, Taiwan
| | - Shu-Man Hu
- Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan
| | - Chih-Yu Wu
- Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan
- Molecular Imaging Center, National Taiwan University, Taipei, 10617, Taiwan
- Corresponding author. Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan.
| | - Ting-Ying Wu
- Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan
| | - Chi-Hung Chen
- School of Dentistry, Graduate Institute of Clinical Dentistry, National Taiwan University and National Taiwan University Hospital, Taipei, 10048, Taiwan
| | - Pei-Chun Liao
- Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan
| | - Zhen-Yu Guan
- Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan
| | - Nai-Chen Cheng
- Department of Surgery, National Taiwan University Hospital and College of Medicine, Taipei, 10002, Taiwan
- Corresponding author.
| | - Hsien-Yeh Chen
- Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan
- Molecular Imaging Center, National Taiwan University, Taipei, 10617, Taiwan
- Corresponding author. Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan.
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Chen FJ, Hsiao YS, Liao IH, Liu CT, Wu PI, Lin CY, Cheng NC, Yu J. Rational design of a highly porous electronic scaffold with concurrent enhancement in cell behaviors and differentiation under electrical stimulation. J Mater Chem B 2021; 9:7674-7685. [PMID: 34586139 DOI: 10.1039/d1tb01260f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Conductive polymers (CPs) have received increasing attention as promising materials for studying electrophysiological signals in cell and tissue engineering. The combination of CPs with electrical stimulation (ES) could possibly enhance neurogenesis, osteogenesis, and myogenesis. To date, research has been prioritized on capitalizing CPs as two-dimensional (2D) structures for guiding the differentiation. In contrast, relatively little is conducted on the implementation of 3D conductive scaffolds. In this research, we report the synergic assembly of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) and multi-walled carbon nanotubes (MWCNTs) as a biocompatible, electrically conductive, mechanically robust and structurally porous 3D scaffold. To showcase the bioelectronic utilization, a proof-of-concept demonstration of electrically stimulated cell culture under ES is conducted. The ES effects coupled with the 3D scaffold are promising on pheochromocytoma 12 (PC12), a neuronal cell line, and the ES effect on osteogenesis of human adipose-derived stem cells (hASC) was further studied. PC12 cultured on this PEDOT:PSS/MWCNT 3D scaffolds was induced to differentiate toward a more mature neuronal phenotype with the ES treatment. Furthermore, hASC osteogenesis could be highly promoted in this conductive scaffold with ES. Calcium deposition concentration and osteo-differentiated gene markers were significantly higher with ES. The facile assembly of 3D conductive scaffolds sheds light on both platforms for investigating the 3D microenvironment for electrophysiological simulation of cells and tissues under the ES treatment of in vivo tissue engineering.
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Affiliation(s)
- Fang-Jung Chen
- Department of Chemical Engineering, National Taiwan University, Da'an Dist., Taipei City 10617, Taiwan.
| | - Yu-Sheng Hsiao
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Da'an Dist., Taipei City 10607, Taiwan.
| | - I-Hsiang Liao
- Department of Chemical Engineering, National Taiwan University, Da'an Dist., Taipei City 10617, Taiwan.
| | - Chun-Ting Liu
- Department of Chemical Engineering, National Taiwan University, Da'an Dist., Taipei City 10617, Taiwan.
| | - Po-I Wu
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Da'an Dist., Taipei City 10607, Taiwan.
| | - Che-Yu Lin
- Institute of Applied Mechanics, National Taiwan University, Da'an Dist., Taipei City 10617, Taiwan
| | - Nai-Chen Cheng
- Department of Surgery, National Taiwan University Hospital, Zhongzheng Dist., Taipei City 10048, Taiwan
| | - Jiashing Yu
- Department of Chemical Engineering, National Taiwan University, Da'an Dist., Taipei City 10617, Taiwan.
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Huang YY, Lin CW, Cheng NC, Cazzell SM, Chen HH, Huang KF, Tung KY, Huang HL, Lin PY, Perng CK, Shi B, Liu C, Ma Y, Cao Y, Li Y, Xue Y, Yan L, Li Q, Ning G, Chang SC. Effect of a Novel Macrophage-Regulating Drug on Wound Healing in Patients With Diabetic Foot Ulcers: A Randomized Clinical Trial. JAMA Netw Open 2021; 4:e2122607. [PMID: 34477854 PMCID: PMC8417758 DOI: 10.1001/jamanetworkopen.2021.22607] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
IMPORTANCE Delayed healing of diabetic foot ulcers (DFUs) is known to be caused by dysregulated M1/M2-type macrophages, and restoring the balance between these macrophage types plays a critical role in healing. However, drugs used to regulate M1/M2 macrophages have not yet been studied in large randomized clinical trials. OBJECTIVE To compare the topical application of ON101 cream with use of an absorbent dressing (Hydrofiber; ConvaTec Ltd) when treating DFUs. DESIGN, SETTING, AND PARTICIPANTS This multicenter, evaluator-blinded, phase 3 randomized clinical trial was performed in 21 clinical and medical centers across the US, China, and Taiwan from November 23, 2012, to May 11, 2020. Eligible patients with debrided DFUs of 1 to 25 cm2 present for at least 4 weeks and with Wagner grade 1 or 2 were randomized 1:1 to receive ON101 or control absorbent dressings. INTERVENTIONS Twice-daily applications of ON101 or a absorbent dressing changed once daily or 2 to 3 times a week for 16 weeks, with a 12-week follow-up. MAIN OUTCOMES AND MEASURES The primary outcome was the incidence of complete healing, defined as complete re-epithelialization at 2 consecutive visits during the treatment period assessed on the full-analysis set (FAS) of all participants with postrandomization data collected. Safety outcomes included assessment of the incidences of adverse events, clinical laboratory values, and vital signs. RESULTS In the FAS, 236 eligible patients (175 men [74.2%]; mean [SD] age, 57.0 [10.9] years; mean [SD] glycated hemoglobin level, 8.1% [1.6%]) with DFUs classified as Wagner grade 1 or 2 (mean [SD] ulcer area, 4.8 [4.4] cm2) were randomized to receive either the ON101 cream (n = 122) or the absorbent dressing (n = 114) for as long as 16 weeks. The incidence of complete healing in the FAS included 74 patients (60.7%) in the ON101 group and 40 (35.1%) in the comparator group during the 16-week treatment period (difference, 25.6 percentage points; odds ratio, 2.84; 95% CI, 1.66-4.84; P < .001). A total of 7 (5.7%) treatment-emergent adverse events occurred in the ON101 group vs 5 (4.4%) in the comparator group. No treatment-related serious adverse events occurred in the ON101 group vs 1 (0.9%) in the comparator group. CONCLUSIONS AND RELEVANCE In this multicenter randomized clinical trial, ON101 exhibited better healing efficacy than absorbent dressing alone in the treatment of DFUs and showed consistent efficacy among all patients, including those with DFU-related risk factors (glycated hemoglobin level, ≥9%; ulcer area, >5 cm2; and DFU duration, ≥6 months). TRIAL REGISTRATION ClinicalTrials.gov Identifier: NCT01898923.
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Affiliation(s)
- Yu-Yao Huang
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Chang Gung Memorial Hospital, Taoyuan City, Taiwan
- Department of Medical Nutritional Therapy, Chang Gung Memorial Hospital, Taoyuan City, Taiwan
| | | | - Nai-Chen Cheng
- Division of Plastic Surgery, Department of Surgery, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan
| | | | - Hsin-Han Chen
- Plastic and Reconstruction Surgery, China Medical University Hospital, Taichung, Taiwan
| | - Kuo-Feng Huang
- Plastic Surgery Center, Chi-Mei Medical Center, Tainan, Taiwan
| | - Kwang-Yi Tung
- Department of Surgery, Mackay Memorial Hospital, Taipei, Taiwan
| | - Hsuan-Li Huang
- Division of Cardiology, Buddhist Tzu Chi General Hospital, Taipei, Taiwan
| | - Pao-Yuan Lin
- Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital, Kaohsiung, Taiwan
| | - Cherng-Kang Perng
- Division of Plastic and Reconstructive Surgery, Taipei Veterans General Hospital, Taipei, Taiwan
- Department of Surgery, National Yang Ming Chiao Tung University School of Medicine, Taipei, Taiwan
| | - Bimin Shi
- Department of Endocrinology, The First Affiliated Hospital of Soochow University, Jiangsu, China
| | - Chang Liu
- Department of Burn and Plastic Surgery, Affiliated Hospital of Jiangsu University, Jiangsu, China
| | - Yujin Ma
- Department of Endocrinology, The First Affiliated Hospital of Henan Science and Technology University, Henan, China
| | - Yemin Cao
- Department of Vascular Anomalies, Shanghai TCM (Traditional Chinese Medicine)–Integrated Hospital, Shanghai, China
| | - Yanbing Li
- Department of Endocrinology, The First Affiliated Hospital of Sun Yat-sen University, Guangdong, China
| | - Yaoming Xue
- Department of Endocrinology, Nanfang Hospital of Southern Medical University, Guangdong, China
| | - Li Yan
- Department of Endocrinology, Sun Yat-sen Memorial Hospital of Sun Yat-sen University, Guangdong, China
| | - Qiu Li
- Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Shandong, China
| | - Guang Ning
- Shanghai National Clinical Research Center for Endocrine and Metabolic Diseases, Shanghai, China
- Key Laboratory for Endocrine and Metabolic Diseases of the National Health Commission of the People’s Republic of China, Shanghai, China
- Shanghai Institute of Endocrine and Metabolic Diseases, Ruijin Hospital, Shanghai, China
- Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Shun-Cheng Chang
- Division of Plastic Surgery, Department of Surgery, Integrated Burn and Wound Care Center, Taipei Medical University-Shuang Ho Hospital, Ministry of Health and Welfare, New Taipei City, Taiwan
- Division of Plastic Surgery, Department of Surgery, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
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Chen MH, Tai WC, Cheng NC, Chang CH, Chang PC. Characterization of the stemness and osteogenic potential of oral and sinus mucosal cells. J Formos Med Assoc 2021; 121:652-659. [PMID: 34233852 DOI: 10.1016/j.jfma.2021.06.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 05/18/2021] [Revised: 06/10/2021] [Accepted: 06/17/2021] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND/PURPOSE Covering the wounds from guided bone regeneration and sinus floor elevation with oral and sinus mucosa is a fundamental criterion for success. This study aimed to verify the regeneration capability of the mucosal connective tissue stromal cells by characterizing their stemness and osteogenic potentials. METHODS Bone marrow stromal cells (BMSCs), alveolar mucosa cells (AMCs), keratinized gingival cells (KGCs), and sinus mucosal cells (SMCs), were isolated from four Sprague-Dawley rats. The morphology and viability of the cells were investigated under a confocal microscope and by Alamar Blue. Stem cell surface markers were evaluated by flow cytometry. Expressions of pluripotent factors after initial seeding and an early osteogenic gene following 24 h of osteoinduction were evaluated by realtime PCR. Trilineage differentiation capability in long-term inductive cell culture was assessed by Alizarin Red, Alcian Blue, and Oil Red O staining. RESULTS BMSCs and AMCs were larger cells with smaller aspect ratios relative to KGCs and SMCs, and BMSCs revealed the greatest initial viability but the slowest proliferation. More than 94% of BMSCs, AMCs, and KGCs were double-positive for CD73 and CD90. Compared with BMSCs, AMCs expressed significantly higher Oct4 but reduced Cbfa1 after initial seeding, and AMCs and SMCs expressed significantly higher Cbfa1 following 24 h of osteoinduction. In long-term inductive cell culture, osteogenesis was observed in BMSCs, AMCs, and SMCs, chondrogenesis was observed in BMSCs, AMCs, and KGCs, and adipogenesis was evident in only BMSCs. CONCLUSION AMCs contain a high percentage of stem/progenitor cells and show differentiation capability toward osteogenic lineage.
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Affiliation(s)
- Ming-Hsu Chen
- Department of Otorhinolaryngology, Cathay General Hospital, Taipei, Taiwan
| | - Wei-Chiu Tai
- Graduate Institute of Clinical Dentistry, School of Dentistry, National Taiwan University, Taipei, Taiwan
| | - Nai-Chen Cheng
- Department of Surgery, National Taiwan University Hospital, Taipei, Taiwan
| | - Ching-He Chang
- Graduate Institute of Clinical Dentistry, School of Dentistry, National Taiwan University, Taipei, Taiwan
| | - Po-Chun Chang
- Graduate Institute of Clinical Dentistry, School of Dentistry, National Taiwan University, Taipei, Taiwan; Division of Periodontics, Department of Dentistry, National Taiwan University Hospital, Taipei, Taiwan; School of Dentistry, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.
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Chiang TY, Huang CH, Kuan CH, Horng SY, Hsieh JH, Wu YF, Chuang SY, Yu YH, Ho CC, Cheng NC, Tai HC. Resuming Oral Feeding in Patients With Oral Squamous Cell Carcinoma With Free Anterolateral Thigh Flap Reconstruction. Ann Plast Surg 2021; 86:S108-S112. [PMID: 33438960 DOI: 10.1097/sap.0000000000002652] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Quality of life and functional improvement have emerged as important goals for patients with oncologic disease. For patients with head and neck cancer, free anterolateral thigh (ALT) flaps serve as reliable reconstruction and provide functional restoration. Nevertheless, factors affecting the resumption of oral feeding are rarely described. This study aimed to evaluate and compare the functional outcomes of oral feeding for patients with different oncologic defect patterns and reconstructive ALT flap designs. METHODS We retrospectively reviewed patients with head and neck cancer undergoing oncologic ablation and free ALT reconstruction between January 2016 and April 2018 at National Taiwan University Hospital. Patients were categorized into 2 groups as through-and-through (T&T) and non-through-and-through (non-T&T) according to the defect pattern. We further subgrouped T&T patients into lip resection/lip sparing according to lip involvement. Reconstructive ALT flaps were of 2 designs, folded (F-ALT) and chimeric (C-ALT). Outcomes of oral feeding were analyzed using descriptive statistics, and differences between groups were compared using the Student t test. RESULTS We identified 233 patients who received oncologic ablation and free ALT flap reconstruction. There was no significant difference in functional recovery between the T&T and non-T&T groups (81.2% vs 73%, P = 0.137). However, among patients who succeeded in resuming oral feeding, lip-sparing patients had better functional recovery in terms of early oral feeding within 6 months and nasogastric tube removal compared with lip-resection patients (100% vs 83.3%, P = 0.001). Moreover, the F-ALT design resulted in a higher success rate in resuming oral feeding compared with the C-ALT design (90.5% vs 54.6%, P = 0.032). CONCLUSIONS Patients with head and neck cancer with T&T defects were associated with higher rates of secondary flap revision and a trend of delayed oral feeding. In the long term, improved oral feeding outcome with the F-ALT design was observed compared with the C-ALT design in the specific group with T&T defect.
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Affiliation(s)
- Ting-Yen Chiang
- From the Division of Plastic Surgery, Department of Surgery, National Taiwan University Hospital
| | - Chieh-Huei Huang
- From the Division of Plastic Surgery, Department of Surgery, National Taiwan University Hospital
| | - Chen-Hsiang Kuan
- From the Division of Plastic Surgery, Department of Surgery, National Taiwan University Hospital
| | - Shyue-Yih Horng
- From the Division of Plastic Surgery, Department of Surgery, National Taiwan University Hospital
| | - Jung-Hsien Hsieh
- From the Division of Plastic Surgery, Department of Surgery, National Taiwan University Hospital
| | - Yu-Feng Wu
- From the Division of Plastic Surgery, Department of Surgery, National Taiwan University Hospital
| | - Shu-Yang Chuang
- From the Division of Plastic Surgery, Department of Surgery, National Taiwan University Hospital
| | - Ya-Han Yu
- National Taiwan University and College of Medicine, Taipei
| | | | - Nai-Chen Cheng
- From the Division of Plastic Surgery, Department of Surgery, National Taiwan University Hospital
| | - Hao-Chih Tai
- From the Division of Plastic Surgery, Department of Surgery, National Taiwan University Hospital
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Lu TY, Yu KF, Kuo SH, Cheng NC, Chuang EY, Yu JS. Enzyme-Crosslinked Gelatin Hydrogel with Adipose-Derived Stem Cell Spheroid Facilitating Wound Repair in the Murine Burn Model. Polymers (Basel) 2020; 12:E2997. [PMID: 33339100 PMCID: PMC7765510 DOI: 10.3390/polym12122997] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Revised: 12/09/2020] [Accepted: 12/14/2020] [Indexed: 12/22/2022] Open
Abstract
Engineered skin that can facilitate tissue repair has been a great advance in the field of wound healing. A well-designed dressing material together with active biological cues such as cells or growth factors can overcome the limitation of using auto-grafts from patients. Recently, many studies showed that human adipose-derived stem cells (hASCs) can be used to promote wound healing and skin tissue engineering. hASCs have already been widely applied for clinical trials. hASCs can be harvested abundantly because they can be easily isolated from fat tissue known as the stromal vascular fraction (SVF). On the other hand, increasing studies have proven that cells from spheroids can better simulate the biological microenvironment and can enhance the expression of stemness markers. However, a three-dimensional (3D) scaffold that can harbor implanted cells and can serve as a skin-repaired substitute still suffers from deficiency. In this study, we applied a gelatin/microbial transglutaminase (mTG) hydrogel to encapsulate hASC spheroids to evaluate the performance of 3D cells on skin wound healing. The results showed that the hydrogel is not toxic to the wound and that cell spheroids have significantly improved wound healing compared to cell suspension encapsulated in the hydrogel. Additionally, a hydrogel with cell spheroids was much more effective than other groups in angiogenesis since the cell spheroid has the possibility of cell-cell signaling to promote vascular generation.
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Affiliation(s)
- Ting-Yu Lu
- Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei 10617, Taiwan; (T.-Y.L.); (K.-F.Y.); (S.-H.K.)
| | - Kai-Fu Yu
- Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei 10617, Taiwan; (T.-Y.L.); (K.-F.Y.); (S.-H.K.)
| | - Shuo-Hsiu Kuo
- Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei 10617, Taiwan; (T.-Y.L.); (K.-F.Y.); (S.-H.K.)
| | - Nai-Chen Cheng
- Department of Surgery, National Taiwan University Hospital, Taipei 10617, Taiwan
| | - Er-Yuan Chuang
- International Ph.D. Program in Biomedical Engineering, Graduate Institute of Biomedical Materials and Tissue Engineering, Taipei Medical University, Taipei 11031, Taiwan
- Cell Physiology and Molecular Image Research Center, Wan Fang Hospital, Taipei Medical University, Taipei 11031, Taiwan
| | - Jia-Shing Yu
- Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei 10617, Taiwan; (T.-Y.L.); (K.-F.Y.); (S.-H.K.)
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Fadera S, Cheng NC, Young TH, Lee IC. In vitro study of SDF-1α-loaded injectable and thermally responsive hydrogels for adipose stem cell therapy by SDF-1/CXCR4 axis. J Mater Chem B 2020; 8:10360-10372. [PMID: 33108417 DOI: 10.1039/d0tb01961e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Stem cell-based approaches have become a promising therapeutic strategy for treating ischemic diseases. The aim of this study was to develop injectable hydrogel systems for the local release of stromal cell-derived factor-1α (SDF-1α) to recruit adipose stem cells (ASCs) that express CXCR4 to achieve stem cell therapy and therapeutic angiogenesis. Thermoresponsive and injectable chitosan (CS)/β-glycerophosphate disodium salt pentahydrate (βGP) hydrogels with different concentrations of hyaluronic acid (HA) were designed and fabricated to achieve local and sustained release of SDF-1α for ASC recruitment. Herein, the material structures, physical properties, gelation temperature, and gelation time of hydrogels with different compositions were determined. The incorporation of 0.9% HA in CS-based hydrogels not only enhanced the gelation time but also increased the strength of the hydrogels. In addition, the results revealed that the thermoresponsive and injectable CS/βGP/HA hydrogels showed good biocompatibility. In addition, the in vitro release profiles showed that the hydrogels achieved sustained release of SDF-1α over 7 days and enhanced ASC migration. The results revealed that the hydrogels with HA enhanced the sustained release effect compared with the hydrogel without HA, indicating that the HA content regulated the physical and release properties of the injectable hydrogels. Therefore, thermoresponsive and injectable CS/βGP/HA hydrogels may provide an alternative for treating ischemic diseases via SDF-1/CXCR4 axis for ASC recruitment and retention.
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Affiliation(s)
- Siaka Fadera
- Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, Hsinchu, Taiwan.
| | - Nai-Chen Cheng
- Department of Surgery, National Taiwan University Hospital and College of Medicine, 7 Chung-Shan S Rd, Taipei 100, Taiwan
| | - Tai-Horng Young
- Department of Biomedical Engineering, College of Medicine and College of Engineering, National Taiwan University, 1 Jen-Ai Rd, Taipei 100, Taiwan.
| | - I-Chi Lee
- Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, Hsinchu, Taiwan.
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Cheng NC, Tu YK, Lee NH, Young TH. Influence of Human Platelet Lysate on Extracellular Matrix Deposition and Cellular Characteristics in Adipose-Derived Stem Cell Sheets. Front Cell Dev Biol 2020; 8:558354. [PMID: 33195191 PMCID: PMC7642065 DOI: 10.3389/fcell.2020.558354] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Accepted: 09/22/2020] [Indexed: 12/13/2022] Open
Abstract
Adipose-derived stem cell (ASC) is a valuable source of cell therapy. By stimulating extracellular matrix (ECM) secretion, ASC sheets can be fabricated with enhanced regenerative capabilities. In recent years, human platelet lysate (HPL) provides an attractive alternative to fetal bovine serum (FBS) for the ex vivo expansion of ASCs for clinical use. However, the effect of HPL on ASC sheet formation has not been previously determined. In this study, we compared ECM composition and cellular characteristics of ASC sheets cultured in growth medium supplemented with either FBS or HPL. HPL supplement significantly enhanced ASC proliferation without obvious change in the expression pattern of cell surface markers. We found that culturing ASCs with HPL rendered thicker cell sheets with significantly more ECM deposition, including collagen and fibronectin. Proteomic analysis of the FBS or HPL-cultured cell sheets showed diversity in ECM composition. HPL-cultured ASC sheets exhibited up-regulation of interleukin-6 and an anti-inflammatory cytokine, C1q/tumor necrosis factor-related protein-3. Conditioned medium of HPL-cultured ASC sheets significantly enhanced fibroblast migration and tube formation of endothelial cells in vitro, while it inhibited the migration of macrophages toward stimulated macrophages in vitro. TGF-β1-stimulated fibroblasts cultured in ASC sheet-conditioned medium showed down-regulation of α-SMA and TGF-β1. By adding an anti-hepatocyte growth factor (HGF) neutralizing antibody in conditioned medium, we indicated that an anti-fibrosis effect of HPL-cultured ASC sheets is partially mediated through the increased secretion of HGF. Moreover, chick embryo chorioallantoic membrane (CAM) assay showed comparable capillary density after applying either FBS or HPL-cultured ASC sheets, both of which were significantly higher than the control. In conclusion, robust ECM formation with altered ECM composition was noted in ASC sheets cultured in HPL-supplemented medium. Their immunomodulatory and pro-angiogenesis capabilities were largely maintained. Our findings paved the way to elucidate the potential of HPL-cultured ASC sheets for clinical application in tissue regeneration.
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Affiliation(s)
- Nai-Chen Cheng
- Department of Surgery, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Yuan-Kun Tu
- Department of Orthopedics, E-Da Hospital/I-Shou University, Kaohsiung, Taiwan
| | - Ning-Hsu Lee
- Institute of Biomedical Engineering, College of Medicine, College of Engineering, National Taiwan University, Taipei, Taiwan
| | - Tai-Horng Young
- Institute of Biomedical Engineering, College of Medicine, College of Engineering, National Taiwan University, Taipei, Taiwan
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Lin CW, Guan ZY, Lu M, Wu TY, Cheng NC, Chen HY, Yu J. Synergistically Enhanced Wound Healing of a Vapor-Constructed Porous Scaffold. ACS Appl Bio Mater 2020; 3:5678-5686. [DOI: 10.1021/acsabm.0c00435] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Che-Wei Lin
- Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Zhen-Yu Guan
- Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Min Lu
- Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Ting-Ying Wu
- Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Nai-Chen Cheng
- Department of Surgery, National Taiwan University Hospital, Taipei 10031, Taiwan
| | - Hsien-Yeh Chen
- Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei 10617, Taiwan
- Molecular Imaging Center, National Taiwan University, Taipei 10617, Taiwan
- Advanced Research Center for Green Materials Science and Technology, National Taiwan University, Taipei 10617, Taiwan
| | - Jiashing Yu
- Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei 10617, Taiwan
- Molecular Imaging Center, National Taiwan University, Taipei 10617, Taiwan
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Wu YF, Lee TY, Liao WT, Chuan HH, Cheng NC, Cheng CM. Rapid detection of biofilm with modified alcian blue staining: In-vitro protocol improvement and validation with clinical cases. Wound Repair Regen 2020; 28:834-843. [PMID: 32691440 DOI: 10.1111/wrr.12845] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 07/02/2020] [Accepted: 07/03/2020] [Indexed: 12/17/2022]
Abstract
For chronic wounds, biofilm infection is a critical issue because it can tip the scales toward an unhealing state. Biofilm-based wound therapy has been extensively advocated. However, point-of-care biofilm diagnosis still largely relies on clinical judgment. In this study, we aimed to develop a rapid tool for diagnosing wound biofilm presence by alcian blue staining. First, we sought to optimize alcian blue staining using a colorimetric-based approach to detect the biofilm, specifically targeting polysaccharides in the extracellular polymeric substances. Among examined transfer membranes and cationic detergents at various concentrations, we selected a positively charged nylon transfer membrane for sample loading, and 1% cetyl trimethyl ammonium chloride (CTAC) as the blocking solution. After sample loading and blocking, the membrane was immersed in alcian blue solution for staining, followed by immersion in 1% CTAC to decrease background noise. Each step required only 30 seconds, and the whole procedure was completed within a few minutes. In the second part of this study, we enrolled 31 patients with chronic wounds to investigate the predictive validity of biofilm detection for unhealed wounds at a 1-month follow-up visit. Among the 18 cases with positive wound biofilm staining, 15 wounds (83.3%) were not healed at the 1-month follow-up visit. Only three unhealed wounds (30%) produced in negative staining cases. This finding indicates that biofilm infection is associated with poor healing outcome for chronic wounds. Moreover, our staining results correlated well with the clinical microbiological culture assessment (83.9% consistency; 95.2% sensitivity, and 60% specificity). In conclusion, the modified alcian blue staining protocol used here represents a rapid and sensitive procedure for detecting biofilm in chronic wounds. This technique provides a practical point-of-care approach for detection of wound biofilm, the implementation of which may improve clinical outcomes for chronic wound patients. Additional studies are required to validate this method.
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Affiliation(s)
- Yu-Feng Wu
- Department of Surgery, National Taiwan University Hospital, Hsin-Chu Branch, Hsinchu, Taiwan
| | - Tyng-Yuh Lee
- Institute of Biomedical Engineering, National Tsing Hua University, Hsinchu, Taiwan
| | - Wan-Ting Liao
- Institute of Biomedical Engineering, National Tsing Hua University, Hsinchu, Taiwan
| | - Ho-Hsien Chuan
- Department of Surgery, National Taiwan University Hospital, Chu-Tung Branch, Hsinchu, Taiwan
| | - Nai-Chen Cheng
- Department of Surgery, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan
| | - Chao-Min Cheng
- Institute of Biomedical Engineering, National Tsing Hua University, Hsinchu, Taiwan
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Tsai CC, Kuo SH, Lu TY, Cheng NC, Shie MY, Yu J. Enzyme-Cross-linked Gelatin Hydrogel Enriched with an Articular Cartilage Extracellular Matrix and Human Adipose-Derived Stem Cells for Hyaline Cartilage Regeneration of Rabbits. ACS Biomater Sci Eng 2020; 6:5110-5119. [PMID: 33455262 DOI: 10.1021/acsbiomaterials.9b01756] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Hyaline cartilage regeneration remains clinically challenging. In this study, microbial transglutaminase was used to cross-link gelatin. The articular cartilage extracellular matrix (cECM), mainly comprising collagen type II and glycosaminoglycans (GAGs), which can support chondrogenesis, was enclosed in this enzyme-catalyzed hydrogel. After human adipose-derived stem cells (hASCs) were encapsulated in the hydrogel enriched with the cECM, the results demonstrated that the enzymatic cross-linking reaction is of low cytotoxicity. Moreover, the stem cells showed great proliferation and chondrogenic differentiation potential in the hydrogel. Most importantly, we assessed the therapeutic effects of applying a hydrogel enriched with the cECM and hASCs to repair a full-thickness osteochondral defect. At 8 weeks after surgery, the GCC group (hydrogel encapsulating cells and the cECM) exhibited a smooth articular surface with transparent new hyaline-like tissue macroscopically. According to histological analysis, inflammatory responses were hardly observed, and sound chondrocytes were aligned in the newly formed chondral layer. In addition, the GCC group exhibited significant improvement in the GAG content between weeks 4 and 8. In summary, the implantation of a gelatin hydrogel enriched with the cECM and hASCs could facilitate the hyaline cartilage regeneration significantly in rabbit knee joint models.
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Affiliation(s)
- Ching-Cheng Tsai
- Department of Chemical Engineering, National Taiwan University, No.1, Sec. 4, Roosevelt Rd., Da'an Dist., Taipei City 10617, Taiwan
| | - Shuo-Hsiu Kuo
- Department of Chemical Engineering, National Taiwan University, No.1, Sec. 4, Roosevelt Rd., Da'an Dist., Taipei City 10617, Taiwan
| | - Ting-Yu Lu
- Department of Chemical Engineering, National Taiwan University, No.1, Sec. 4, Roosevelt Rd., Da'an Dist., Taipei City 10617, Taiwan
| | - Nai-Chen Cheng
- Department of Surgery, National Taiwan University Hospital, No.1, Changde St., Zhongzheng Dist., Taipei City 10048, Taiwan
| | - Ming-You Shie
- Department of Dentistry, China Medical University, No.91 Hsueh-Shih Rd., Taichung City 40402, Taiwan
| | - Jiashing Yu
- Department of Chemical Engineering, National Taiwan University, No.1, Sec. 4, Roosevelt Rd., Da'an Dist., Taipei City 10617, Taiwan
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Kuan CH, Chung MJ, Hong RL, Tseng TY, Tai HC, Cheng NC, Hsieh JH, Horng SY, Lai HS. The impacts of intra-arterial chemotherapy on head and neck microvascular reconstruction. J Formos Med Assoc 2020; 119:1524-1531. [PMID: 31902466 DOI: 10.1016/j.jfma.2019.12.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Accepted: 12/09/2019] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND For locally advanced head and neck cancers, intra-arterial (IA) chemotherapy is utilized for locoregional control with favorable results. The study aimed to evaluate the surgical outcomes of microsurgical reconstruction in head and neck cancer patients with IA chemotherapy METHODS: This cohort study retrospectively reviewed patients who underwent head and neck microsurgical reconstruction from January 2014 to August 2018. Patients with prior history of chemotherapy were included and categorized into two groups according to history of IA chemotherapy (IA group)/intravenous chemotherapy (IV group). Flap survival was evaluated along with microsurgical revision rates and complications. Recipient vessel specimens were analyzed by histological examination. A 1:1 propensity score matched analysis was performed. RESULTS The study cohort included 45 patients with IA chemotherapy and 201 patients with IV chemotherapy. After propensity score matching, the difference in total flap loss and microsurgical revision rates were nonsignificant between two groups. However, the IA group had significantly higher rates of arterial thrombosis (Odds ratio [OR] 4.98; 95%CI, 1.28-19.38; p = 0.021), wound-related complications (OR 3.30; 95%CI, 1.21-9.02; p = 0.02) and revision surgery within one month (OR 3.73; 95%CI, 1.10-12.64; p = 0.035). Based on histology, IA group vessels showed a higher intima/media ratio than the IV group (0.45 ± 0.06 versus 0.23 ± 0.03, p = 0.02) CONCLUSION: Despite treating local advanced head and neck cancers with good results, IA chemotherapy may cause subsequent deleterious effects on local tissue due to the high concentration of cytotoxic chemotherapeutic agents. Surgeons should be cautious in selection of recipient vessels when performing microvascular reconstruction.
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Affiliation(s)
- Chen-Hsiang Kuan
- Graduate Institute of Clinical Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan; Division of Plastic Surgery, Department of Surgery, National Taiwan University Hospital, Taipei, Taiwan
| | - Ming-Jui Chung
- Division of Plastic Surgery, Department of Surgery, National Taiwan University Hospital, Taipei, Taiwan
| | - Ruey-Long Hong
- Department of Oncology, National Taiwan University Hospital, Taipei, Taiwan
| | - Tsai-Yu Tseng
- School of Biological Science, University of California, Irvine, United States
| | - Hao-Chih Tai
- Division of Plastic Surgery, Department of Surgery, National Taiwan University Hospital, Taipei, Taiwan
| | - Nai-Chen Cheng
- Division of Plastic Surgery, Department of Surgery, National Taiwan University Hospital, Taipei, Taiwan
| | - Jung-Hsien Hsieh
- Division of Plastic Surgery, Department of Surgery, National Taiwan University Hospital, Taipei, Taiwan
| | - Shuyre-Yee Horng
- Division of Plastic Surgery, Department of Surgery, National Taiwan University Hospital, Taipei, Taiwan
| | - Hong-Shiee Lai
- Graduate Institute of Clinical Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan; Department of Surgery, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan; Department of Surgery, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan.
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Liu TJ, Tai HC, Chien KL, Cheng NC. Predisposing factors of necrotizing fasciitis with comparison to cellulitis in Taiwan: A nationwide population-based case–control study. J Formos Med Assoc 2020; 119:18-25. [DOI: 10.1016/j.jfma.2019.01.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Revised: 01/11/2019] [Accepted: 01/15/2019] [Indexed: 11/29/2022] Open
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Tang KC, Yang KC, Lin CW, Chen YK, Lu TY, Chen HY, Cheng NC, Yu J. Human Adipose-Derived Stem Cell Secreted Extracellular Matrix Incorporated into Electrospun Poly(Lactic- co-Glycolic Acid) Nanofibrous Dressing for Enhancing Wound Healing. Polymers (Basel) 2019; 11:E1609. [PMID: 31623334 PMCID: PMC6835469 DOI: 10.3390/polym11101609] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 09/26/2019] [Accepted: 09/29/2019] [Indexed: 12/23/2022] Open
Abstract
Wound dressing, which prevents dehydration and provides a physical barrier against infection to wound beds, can improve wound healing. The interactions between extracellular matrix (ECM) and growth factors is critical to the healing process. Electrospun nanofibers are promising templates for wound dressings due to the structure similarity to ECM of skin. Otherwise, the ECM secreted by human adipose-derived stem cells (hASCs) is rich in growth factors known to enhance wound healing. Accordingly, we propose that the PLGA nanofibrous template incorporated with hASCs-secreted ECM may enhance wound healing. In this study, PLGA nanofibrous matrixes with an aligned or a random structure were prepared by electrospinning. Human ASCs cultured on the aligned matrix had a better viability and produced a larger amount of ECM relative to that of random one. After 7 days' cultivation, the hASCs on aligned PLGA substrates underwent decellularization to fabricate cECM/PLGA dressings. By using immunohistochemical staining against F-actin and cell nucleus, the removal of cellular components was verified. However, the type I collagen and laminin were well preserved on the cECM/PLGA nanofibrous matrixes. In addition, this substrate was hydrophilic, with appropriate mechanical strength to act as a wound dressing. The L929 fibroblasts had good activity, survival and proliferation on the cECM/PLGA meshes. In addition, the cECM/PLGA nanofibrous dressings improved the wound healing of surgically created full-thickness skin excision in a mouse model. This hASCs-secreted ECM incorporated into electrospun PLGA nanofibrous could be a promising dressing for enhancing wound healing.
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Affiliation(s)
- Kao-Chun Tang
- Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei 106, Taiwan.
| | - Kai-Chiang Yang
- School of Dental Technology, Taipei Medical University, Taipei 106, Taiwan.
| | - Che-Wei Lin
- Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei 106, Taiwan.
| | - Yi-Kai Chen
- Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei 106, Taiwan.
| | - Ting-Yu Lu
- Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei 106, Taiwan.
| | - Hsien-Yeh Chen
- Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei 106, Taiwan.
| | - Nai-Chen Cheng
- Department of Surgery, National Taiwan University Hospital, Taipei 100, Taiwan.
| | - Jiashing Yu
- Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei 106, Taiwan.
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Gao Y, Ku NJ, Sung TC, Higuchi A, Hung CS, Lee HHC, Ling QD, Cheng NC, Umezawa A, Barro L, Burnouf T, Ye Q, Chen H. The effect of human platelet lysate on the differentiation ability of human adipose-derived stem cells cultured on ECM-coated surfaces. J Mater Chem B 2019; 7:7110-7119. [PMID: 31513217 DOI: 10.1039/c9tb01764j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Human mesenchymal stem cells (hMSCs), such as human adipose-derived stem cells (hADSCs), present heterogeneous characteristics, including varying differentiation abilities and genotypes. hADSCs isolated under different conditions exhibit differences in stemness. We isolated hADSCs from human fat tissues via culture on different cell culture biomaterials including tissue culture polystyrene (TCPS) dishes and extracellular matrix protein (ECM)-coated dishes in medium supplemented with 5% or 10% serum-converted human platelet lysate (hPL) or 10% fetal bovine serum (FBS) as a control. Currently, it is not clear whether xeno-free hPL in the cell culture medium promotes the ability of hMSCs such as hADSCs to differentiate into several cell lineages compared to the xenomaterial FBS. We investigated whether a synchronized effect of ECM (Matrigel, fibronectin, and recombinant vitronectin) coatings on TCPS dishes for efficient hADSC differentiation could be observed when hADSCs were cultured in hPL medium. We found that Matrigel-coated dishes promoted hADSC differentiation into osteoblasts and suppressed differentiation into chondrocytes in 10% hPL medium. Recombinant vitronectin- and fibronectin-coated dishes greatly promoted hADSC differentiation into osteoblasts and chondrocytes in 5% and 10% hPL media. hPL promoted hADSC differentiation into osteoblasts and chondrocytes compared to FBS on the fibronectin-coated surface and recombinant vitronectin-coated surface.
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Affiliation(s)
- Yan Gao
- School of Biomedical Engineering, The Eye Hospital of Wenzhou Medical University, No. 270, Xueyuan Road, Wenzhou, Zhejiang 325027, China.
| | - Nien-Ju Ku
- Department of Chemical and Materials Engineering, National Central University, No. 300, Jhongda Rd, Jhongli, Taoyuan 32001, Taiwan
| | - Tzu-Cheng Sung
- Department of Chemical and Materials Engineering, National Central University, No. 300, Jhongda Rd, Jhongli, Taoyuan 32001, Taiwan
| | - Akon Higuchi
- School of Biomedical Engineering, The Eye Hospital of Wenzhou Medical University, No. 270, Xueyuan Road, Wenzhou, Zhejiang 325027, China. and Department of Chemical and Materials Engineering, National Central University, No. 300, Jhongda Rd, Jhongli, Taoyuan 32001, Taiwan and Center for Emergent Matter Science, Riken, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan and Wenzhou Institute, University of Chinese Academy of Science, No. 16, Xinsan Road, Hi-Tech Industry Park, Wenzhou, Zhejiang, China
| | - Chi-Sheng Hung
- Department of Chemical and Materials Engineering, National Central University, No. 300, Jhongda Rd, Jhongli, Taoyuan 32001, Taiwan
| | - Henry Hsin-Chung Lee
- Department of Surgery, Hsinchu Cathay General Hospital, No. 678, Sec 2, Zhonghua Rd, Hsinchu, 30060, Taiwan and Graduate Institute of Translational and Interdisciplinary Medicine, National Central University, No. 300, Jhongda Rd, Jhongli, Taoyuan 32001, Taiwan
| | - Qing-Dong Ling
- Cathay Medical Research Institute, Cathay General Hospital, No. 32, Ln 160, Jian-Cheng Road, Hsi-Chi City, Taipei 221, Taiwan
| | - Nai-Chen Cheng
- Department of Surgery, National Taiwan University Hospital and College of Medicine, 7 Chung-Shan S. Rd, Taipei 100, Taiwan
| | - Akihiro Umezawa
- Department of Reproduction, National Center for Child Health and Development, 2-10-1 Okura, Setagaya-ku, Tokyo 157-8535, Japan
| | - Lassina Barro
- International PhD Program in Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, No. 250 Wu-Xing Street, Taipei 11031, Taiwan
| | - Thierry Burnouf
- International PhD Program in Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, No. 250 Wu-Xing Street, Taipei 11031, Taiwan and Graduate Institute of Biomedical Materials and Tissue Engineering, College of Biomedical Engineering, Taipei Medical University, No. 250 Wu-Xing Street, Taipei 11031, Taiwan
| | - Qingsong Ye
- Regenerative Dentistry Group, School of Dentistry, The University of Queensland, 288 Herston Road, Herston Qld, Brisbane 4006, Australia
| | - Hao Chen
- School of Biomedical Engineering, The Eye Hospital of Wenzhou Medical University, No. 270, Xueyuan Road, Wenzhou, Zhejiang 325027, China.
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Chen HW, Chou YS, Young TH, Cheng NC. Inhibition of melanin synthesis and melanosome transfer by chitosan biomaterials. J Biomed Mater Res B Appl Biomater 2019; 108:1239-1250. [PMID: 31436375 DOI: 10.1002/jbm.b.34472] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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: 03/05/2019] [Revised: 07/19/2019] [Accepted: 07/19/2019] [Indexed: 01/21/2023]
Abstract
Decreasing skin pigmentation is desirable for various medical or cosmetic conditions. Although numerous pharmaceutical agents are currently available, their depigmentation effects are still not satisfactory. In this study, we investigated the effects of chitosan, a natural marine product, on melanin synthesis and melanosome transfer. Treating B16F10 melanoma cells caused the inhibitory effect of chitosan on melanogenesis to be more prominent under α-melanocyte-stimulating hormone (α-MSH) stimulation. Chitosan samples of different molecular weights inhibited melanogenesis to a comparable extent, whereas increasing the deacetylation of chitosan enhanced its depigmentation effects. Chitosan was found to effectively reduce basal or α-MSH-stimulated melanogenesis by suppressing the expression of melanogenic-related proteins (microphthalmia transcription factor, tyrosinase, and tyrosinase-related protein-1 and protein-2) as well as inhibiting tyrosinase activity. Moreover, the inhibitory effect of chitosan on melanogenesis in human melanocytes was confirmed. A transwell coculture system using permeable inserts was designed to allow the contact of human melanocytes and human HaCaT keratinocytes through the tiny holes on the membrane. When chitosan was added to this melanocyte-keratinocyte coculture system, we observed decreased melanosome release from melanocytes. Reduced melanosome uptake by keratinocytes was also observed, and was probably mediated by inhibiting protease-activated receptor 2 expression. Many skin-whitening agents can modulate the process of melanogenesis, but few have been shown to inhibit the melanosome transfer and uptake process. We demonstrated that chitosan exhibits a robust effect on depigmentation by inhibiting melanogenesis as well as melanosome transfer and uptake. Therefore, chitosan represents a potential therapeutic agent for hyperpigmentation disorders.
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Affiliation(s)
- Hsi-Wen Chen
- Institute of Biomedical Engineering, College of Medicine and College of Engineering, National Taiwan University, Taipei, Taiwan
| | - Ya-Shuan Chou
- Institute of Biomedical Engineering, College of Medicine and College of Engineering, National Taiwan University, Taipei, Taiwan
| | - Tai-Horng Young
- Institute of Biomedical Engineering, College of Medicine and College of Engineering, National Taiwan University, Taipei, Taiwan
| | - Nai-Chen Cheng
- Department of Surgery, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan.,Research Center for Developmental Biology and Regenerative Medicine, National Taiwan University, Taipei, Taiwan
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Cheng Y, Ko AT, Huang JH, Lee BC, Yang RS, Liang CW, Tai HC, Cheng NC. Developing a clinical scoring system to differentiate deep-seated atypical lipomatous tumor from lipoma of soft tissue. Asian J Surg 2019; 42:832-838. [DOI: 10.1016/j.asjsur.2018.12.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Revised: 12/13/2018] [Accepted: 12/24/2018] [Indexed: 02/07/2023] Open
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Hsu YT, Wu CY, Guan ZY, Sun HY, Mei C, Chen WC, Cheng NC, Yu J, Chen HY. Characterization of Mechanical Stability and Immunological Compatibility for Functionalized Modification Interfaces. Sci Rep 2019; 9:7644. [PMID: 31113975 PMCID: PMC6529445 DOI: 10.1038/s41598-019-43999-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [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: 06/18/2018] [Accepted: 05/07/2019] [Indexed: 11/17/2022] Open
Abstract
Surface modification layers are performed on the surfaces of biomaterials and have exhibited promise for decoupling original surface properties from bulk materials and enabling customized and advanced functional properties. The physical stability and the biological compatibility of these modified layers are equally important to ensure minimized delamination, debris, leaching of molecules, and other problems that are related to the failure of the modification layers and thus can provide a long-term success for the uses of these modified layers. A proven surface modification tool of the functionalized poly-para-xylylene (PPX) system was used as an example, and in addition to the demonstration of their chemical conjugation capabilities and the functional properties that have been well-documented, in the present report, we additionally devised the characterization protocols to examine stability properties, including thermostability and adhesive strength, as well as the biocompatibility, including cell viability and the immunological responses, for the modified PPX layers. The results suggested a durable coating stability for PPXs and firmly attached biomolecules under these stability and compatibility tests. The durable and stable modification layers accompanied by the native properties of the PPXs showed high cell viability against fibroblast cells and macrophages (MΦs), and the resulting immunological activities created by the MΦs exhibited excellent compatibility with non-activated immunological responses and no indication of inflammation.
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Affiliation(s)
- Yao-Tsung Hsu
- Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan
| | - Chih-Yu Wu
- Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan.
| | - Zhen-Yu Guan
- Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan
| | - Ho-Yi Sun
- Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan
| | - Chieh Mei
- Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan
| | - Wen-Chien Chen
- Department of Orthopedic Surgery, Chang Gung Memorial Hospital, College of Medicine Chang Gung University, Taoyuan, 333, Taiwan
| | - Nai-Chen Cheng
- Department of Surgery, National Taiwan University Hospital, Taipei, 10018, Taiwan
| | - Jiashing Yu
- Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan.
| | - Hsien-Yeh Chen
- Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan.
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33
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Chen MN, Ho KY, Hung YN, Su CC, Kuan CH, Tai HC, Cheng NC, Lin CC. Pre-treatment quality of life as a predictor of distant metastasis-free survival and overall survival in patients with head and neck cancer who underwent free flap reconstruction. Eur J Oncol Nurs 2019; 41:1-6. [PMID: 31358241 DOI: 10.1016/j.ejon.2019.05.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 05/14/2019] [Accepted: 05/14/2019] [Indexed: 12/22/2022]
Abstract
PURPOSE This study examined the prognostic associations of pre-treatment quality of life (QoL) with overall survival (OS) and distant metastasis-free survival (DFMS) among patients with head and neck cancer (HNC) who underwent free flap reconstruction. METHODS A cohort of 127 HNC patients who received free flap reconstruction between November 2010 and June 2014 at a hospital were recruited. Pre-treatment QoL was measured by the University of Washington Quality of Life Questionnaire, which contains six physical domains, including speech, swallowing, appearance, saliva, taste and chewing, as well as the six social-emotional domains of pain, activity, recreation, shoulder, mood, and anxiety. Cox regression analyses were performed. RESULTS Results showed that pre-treatment QoL was predictive of OS and DMFS. Of the domains, swallowing, chewing, speech, taste, saliva, pain and shoulder were demonstrated to be significant predictors of OS. Additionally, swallowing, chewing, speech, pain and activity were demonstrated making significant contributions to DMFS. CONCLUSION Our data supported that physical domains of pre-treatment QoL were predictors for OS and DFMS in HNC patients with free-flap reconstruction. Longitudinal studies are warranted to clarify the prognostic abilities of social-emotional domains. Information on pre-treatment QoL should be taken into account to individualize care plan for these patients, and hence prolong their survival.
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Affiliation(s)
- M N Chen
- Department of Nursing, National Taiwan University Hospital, Taipei, Taiwan; School of Nursing, College of Nursing, Taipei Medical University, Taipei, Taiwan.
| | - K Y Ho
- School of Nursing, The University of Hong Kong, HKSAR, China.
| | - Y N Hung
- School of Gerontology and Health Management, College of Nursing, Taipei Medical University, Taipei, Taiwan.
| | - C C Su
- Department of Nursing, Chang Gung University of Science and Technology, Chiayi, Taiwan.
| | - C H Kuan
- Graduate Institute of Clinical Research, College of Medicine, National Taiwan University, Taipei, Taiwan; Division of Plastic Surgery, Department of Surgery, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan.
| | - H C Tai
- Division of Plastic Surgery, Department of Surgery, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan.
| | - N C Cheng
- Division of Plastic Surgery, Department of Surgery, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan.
| | - C C Lin
- School of Nursing, College of Nursing, Taipei Medical University, Taipei, Taiwan; School of Nursing, The University of Hong Kong, HKSAR, China; Alice Ho Miu Ling Nethersole Charity Foundation Professor in Nursing, Hong Kong.
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34
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Lin CW, Chen YK, Tang KC, Yang KC, Cheng NC, Yu J. Keratin scaffolds with human adipose stem cells: Physical and biological effects toward wound healing. J Tissue Eng Regen Med 2019; 13:1044-1058. [PMID: 30938939 DOI: 10.1002/term.2855] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [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: 03/15/2018] [Revised: 02/26/2019] [Accepted: 03/15/2019] [Indexed: 01/31/2023]
Abstract
Keratin, a natural biomaterial derived from wool or human hair, has the intrinsic ability to interact with different types of cells and the potential to serve as a controllable extracellular matrix that can be used a scaffold for tissue engineering. In this study, we demonstrated a simple and fast technique to construct 3D keratin scaffolds for accelerated wound healing using a lyophilization method based on extraction of keratin from human hair. The physical properties of the keratin scaffolds such as water uptake, pore size, and porosity can be adjusted by changing the protein concentrations during the fabrication process. The keratin scaffolds supported human adipose stem cells (hASCs) adhesion, proliferation, and differentiation. In vivo study performed on ICR mice showed that keratin scaffolds with hASCs shortened skin wound healing time, accelerated epithelialization, and promoted wound remodeling. Therefore, keratin scaffolds alone or together with hASCs may serve as therapeutic agents for repairing wounded tissue.
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Affiliation(s)
- Che-Wei Lin
- Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei, Taiwan.,Institute of Biotechnology, National Taiwan University, Taipei, Taiwan
| | - Yi-Kai Chen
- Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei, Taiwan
| | - Kao-Chun Tang
- Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei, Taiwan
| | - Kai-Chiang Yang
- School of Dental Technology, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan.,Laboratory of Organ and Tissue Reconstruction, Institute for Frontier Life and Medical Sciences, Kyoto University, Kyoto, Japan
| | - Nai-Chen Cheng
- Department of Surgery, National Taiwan University Hospital, Taipei, Taiwan
| | - Jiashing Yu
- Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei, Taiwan
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35
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Tsai CC, Hong YJ, Lee RJ, Cheng NC, Yu J. Enhancement of human adipose-derived stem cell spheroid differentiation in an in situ enzyme-crosslinked gelatin hydrogel. J Mater Chem B 2019; 7:1064-1075. [DOI: 10.1039/c8tb02835d] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Standardized human adipose-derived stem cell spheroids can be harvested abundantly and the differentiation capability of cell spheroids performed well in the enzyme-crosslinked gelatin hydrogel.
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Affiliation(s)
- Ching-Cheng Tsai
- Department of Chemical Engineering
- National Taiwan University
- Taipei City 10617
- Taiwan
| | - Yu-Jun Hong
- Department of Chemical Engineering
- National Taiwan University
- Taipei City 10617
- Taiwan
| | - Randall J. Lee
- Department Medicine
- University of California San Francisco
- San Francisco
- USA
| | - Nai-Chen Cheng
- Department of Surgery
- National Taiwan University Hospital
- Taipei City 10048
- Republic of China
| | - Jiashing Yu
- Department of Chemical Engineering
- National Taiwan University
- Taipei City 10617
- Taiwan
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36
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Wu YK, Cheng NC, Cheng CM. Biofilms in Chronic Wounds: Pathogenesis and Diagnosis. Trends Biotechnol 2018; 37:505-517. [PMID: 30497871 DOI: 10.1016/j.tibtech.2018.10.011] [Citation(s) in RCA: 192] [Impact Index Per Article: 32.0] [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: 08/16/2018] [Revised: 10/27/2018] [Accepted: 10/29/2018] [Indexed: 12/17/2022]
Abstract
Chronic non-healing wounds have become a major worldwide healthcare burden. The impact of biofilms on chronic wound infection is well established. Despite increasing understanding of the underlying mechanism of biofilm formation in chronic wounds, current strategies for biofilm diagnosis in chronic wounds are still far from ideal. In this review, we briefly summarize the mechanism of biofilm formation and focus on current diagnostic approaches of chronic wound biofilms based on morphology, microbiology, and molecular assays. Innovative biotechnological approaches, such as wound blotting and transcriptomic analysis, may further shed light on this unmet clinical need. The continuous development of these sophisticated diagnostic approaches can markedly contribute to the future implementation of point-of-care biofilm detection in chronic wound care.
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Affiliation(s)
- Yuan-Kun Wu
- Department of Internal Medicine, National Taiwan University Hospital and College of Medicine, Taipei 100, Taiwan; These authors contributed equally
| | - Nai-Chen Cheng
- Department of Surgery, National Taiwan University Hospital and College of Medicine, Taipei 100, Taiwan; These authors contributed equally.
| | - Chao-Min Cheng
- Institute of Biomedical Engineering and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 300, Taiwan.
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Yu J, Wang MY, Tai HC, Cheng NC. Cell sheet composed of adipose-derived stem cells demonstrates enhanced skin wound healing with reduced scar formation. Acta Biomater 2018; 77:191-200. [PMID: 30017923 DOI: 10.1016/j.actbio.2018.07.022] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Revised: 06/16/2018] [Accepted: 07/10/2018] [Indexed: 12/21/2022]
Abstract
Scar formation remains a major clinical concern following tissue injuries such as skin wounds. Adipose-derived stem cell (ASC) sheets can be fabricated quickly through stimulation with l-ascorbate 2-phosphate and have valuable applications in tissue regeneration and wound healing. However, the antifibrotic capability of ASCs in cell sheet format has not been sufficiently investigated. We employed a murine model of healing-impaired cutaneous wounds and observed faster wound healing with ASC sheet treatment. Significantly more engrafted ASCs were observed in the wound tissue treated with ASC sheets at 14 days after wounding compared with dissociated cells. Moreover, no ASCs were found at day 28, which indicated a minimal risk of long-term side effects. The neoskin formed in the presence of ASC sheets exhibited a thickness comparable to normal skin and possessed a highly organized collagen structure. ASC sheets also suppressed macrophage infiltration and modulated TNF-α and TGF-β1 expression in vivo. Examination of fibroblasts cultured in ASC-conditioned medium indicated an anti-scarring effect of the ASC sheets evidenced by the downregulation of TGF-β1 and α-SMA in fibroblasts, which was likely mediated through the increased secretion of hepatocyte growth factor. Moreover, ASC sheets secreted significantly more C1q/TNF-related protein-3, which inhibited the C-C motif ligand 2 release by macrophages in vitro and subsequently reduced the chemotaxis of unstimulated macrophages. This mechanism may account for the observed decrease in recruitment of macrophages into the wound tissue. We conclude that ASC sheets possess the necessary paracrine factors to improve skin wound healing with a superior neoskin quality. STATEMENT OF SIGNIFICANCE Adipose-derived stem cell (ASC) sheets exhibit great potential for tissue regeneration. In this study, we investigated whether ASC sheets can ameliorate skin wound healing with reduced scar formation, and faster wound healing was observed when applying ASC sheets in an impaired wound healing model of mice. The neoskin formed in the presence of ASC sheets exhibited a thickness comparable to normal skin with a more organized collagen structure. In vitro experiments suggested that the anti-scarring effect of the ASC sheets was partly mediated through increased secretion of hepatocyte growth factor. Moreover, ASC sheets secreted significantly more C1q/TNF-related protein-3, which may account for the decreased recruitment of macrophages into the wound tissue. Therefore, ASC sheets possess the necessary paracrine factors to improve skin wound healing with less scarring, thus representing a desirable method of topical wound treatment.
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Lin CW, Yang KC, Cheng NC, Tsai WB, Lou KL, Yu J. Evaluation of adhesion, proliferation, and differentiation of human adipose-derived stem cells on keratin. J Polym Res 2018. [DOI: 10.1007/s10965-018-1446-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Tsai YT, Wu CY, Guan ZY, Sun HY, Cheng NC, Yeh SY, Chen HY. Topologically Controlled Cell Differentiation Based on Vapor-Deposited Polymer Coatings. Langmuir 2017; 33:8943-8949. [PMID: 28825482 DOI: 10.1021/acs.langmuir.7b01984] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In addition to the widely adopted method of controlling cell attachment for cell patterning, pattern formation via cell proliferation and differentiation is demonstrated using precisely defined interface chemistry and spatial topology. The interface platform is created using a maleimide-functionalized parylene coating (maleimide-PPX) that provides two routes for controlled conjugation accessibility, including the maleimide-thiol coupling reaction and the thiol-ene click reaction, with a high reaction specificity under mild conditions. The coating technology is a prime tool for the immobilization of sensitive molecules, such as growth factor proteins. Conjugation of fibroblast growth factor 2 (FGF-2) and bone morphogenetic protein (BMP-2) was performed on the coating surface by elegantly manipulating the reaction routes, and confining the conjugation reaction to selected areas was accomplished using microcontact printing (μCP) and/or UV irradiation photopatterning. The modified interface provides chemically and topologically defined signals that are recognized by cultured murine preosteoblast cells for proliferation (by FGF-2) and osteogenesis (by BMP-2) activities in specific locations. The reported technique additionally enabled synergistic pattern formation for both osteogenesis and proliferation activities on the same interface, which is difficult to perform using conventional cell attachment patterns. Because of the versatility of the coating, which can be applied to a wide range of materials and on curved and complex devices, the proposed technology is extendable to other prospective biomaterial designs and material interface modifications.
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Affiliation(s)
- Ya-Ting Tsai
- Department of Chemical Engineering, National Taiwan University , Taipei, 10617 Taiwan
| | - Chih-Yu Wu
- Department of Chemical Engineering, National Taiwan University , Taipei, 10617 Taiwan
| | - Zhen-Yu Guan
- Department of Chemical Engineering, National Taiwan University , Taipei, 10617 Taiwan
| | - Ho-Yi Sun
- Department of Chemical Engineering, National Taiwan University , Taipei, 10617 Taiwan
| | - Nai-Chen Cheng
- Department of Surgery, National Taiwan University Hospital , Taipei, 10018 Taiwan
| | - Shu-Yun Yeh
- Department of Chemical Engineering, National Taiwan University , Taipei, 10617 Taiwan
| | - Hsien-Yeh Chen
- Department of Chemical Engineering, National Taiwan University , Taipei, 10617 Taiwan
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Cheng NC, Lin WJ, Ling TY, Young TH. Sustained release of adipose-derived stem cells by thermosensitive chitosan/gelatin hydrogel for therapeutic angiogenesis. Acta Biomater 2017; 51:258-267. [PMID: 28131942 DOI: 10.1016/j.actbio.2017.01.060] [Citation(s) in RCA: 104] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Revised: 12/30/2016] [Accepted: 01/23/2017] [Indexed: 12/18/2022]
Abstract
Adipose-derived stem cells (ASCs) secrete several angiogenic growth factors and can be applied to treat ischemic tissue. However, transplantation of dissociated ASCs has frequently resulted in rapid cell death. Therefore, we aimed to develop a thermosensitive chitosan/gelatin hydrogel that is capable of ASC sustained release for therapeutic angiogenesis. By blending gelatin in the chitosan thermosensitive hydrogel, we significantly enhanced the viability of the encapsulated ASCs. During in vitro culturing, the gradual degradation of gelatin led to sustained release of ASCs from the chitosan/gelatin hydrogel. In vitro wound healing assays revealed significantly faster cell migration by co-culturing fibroblasts with ASCs encapsulated in chitosan/gelatin hydrogel compared to pure chitosan hydrogels. Additionally, significantly higher concentrations of vascular endothelial growth factor were found in the supernatant of ASC-encapsulated chitosan/gelatin hydrogels. Co-culturing SVEC4-10 endothelial cells with ASC-encapsulated chitosan/gelatin hydrogels resulted in significantly more tube-like structures, indicating the hydrogel's potential in promoting angiogenesis. Chick embryo chorioallantoic membrane assay and mice wound healing model showed significantly higher capillary density after applying ASC-encapsulated chitosan/gelatin hydrogel. Relative to ASC alone or ASC-encapsulated chitosan hydrogel, more ASCs were also found in the wound tissue on post-wounding day 5 after applying ASC-encapsulated chitosan/gelatin hydrogel. Therefore, chitosan/gelatin thermosensitive hydrogels not only maintain ASC survival, they also enable sustained release of ASCs for therapeutic angiogenesis applications, thereby exhibiting great clinical potential in treating ischemic diseases. STATEMENT OF SIGNIFICANCE Adipose-derived stem cells (ASCs) exhibit great potential to treat ischemic diseases. However, poor delivery methods lead to low cellular survival or dispersal of cells from target sites. In this study, we developed a thermosensitive chitosan/gelatin hydrogel that not only enhances the viability of the encapsulated ASCs, the gradual degradation of gelatin also result in a more porous architecture, leading to sustained release of ASCs from the hydrogel. ASC-encapsulated hydrogel enhanced in vitro wound healing of fibroblasts and tube formation of endothelial cells. It also promoted in vivo angiogenesis in a chick embryo chorioallantoic membrane assay and a mice wound model. Therefore, chitosan/gelatin hydrogel represents an effective delivery system that allows for controlled release of viable ASCs for therapeutic angiogenesis.
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Affiliation(s)
- Nai-Chen Cheng
- Department of Surgery, National Taiwan University Hospital and College of Medicine, 7 Chung-Shan S Rd, Taipei 100, Taiwan.
| | - Wei-Jhih Lin
- Institute of Biomedical Engineering, College of Medicine and College of Engineering, National Taiwan University, 1 Jen-Ai Rd, Taipei 100, Taiwan.
| | - Thai-Yen Ling
- Department of Pharmacology, College of Medicine, National Taiwan University, 1 Jen-Ai Rd, Taipei 100, Taiwan.
| | - Tai-Horng Young
- Institute of Biomedical Engineering, College of Medicine and College of Engineering, National Taiwan University, 1 Jen-Ai Rd, Taipei 100, Taiwan.
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Lin YH, Huang KW, Chen SY, Cheng NC, Yu J. Keratin/chitosan UV-crosslinked composites promote the osteogenic differentiation of human adipose derived stem cells. J Mater Chem B 2017; 5:4614-4622. [DOI: 10.1039/c7tb00188f] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A photocrosslinkable natural polymer, keratin/chitosan composite, promotes the aggregation and osteogenic differentiation of human adipose derived stem cells.
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Affiliation(s)
- Yung-Hao Lin
- Department of Chemical Engineering
- College of Engineering
- National Taiwan University
- Taipei 10617
- Taiwan
| | - Kai-Wen Huang
- Department of Chemical Engineering
- College of Engineering
- National Taiwan University
- Taipei 10617
- Taiwan
| | - Shao-Yung Chen
- Department of Chemical Engineering
- College of Engineering
- National Taiwan University
- Taipei 10617
- Taiwan
| | - Nai-Chen Cheng
- Department of Surgery
- National Taiwan University Hospital and College of Medicine
- National Taiwan University
- Taipei 100
- Taiwan
| | - Jiashing Yu
- Department of Chemical Engineering
- College of Engineering
- National Taiwan University
- Taipei 10617
- Taiwan
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42
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Abstract
The extra cellular matrix (ECM) and cell–cell interactions facilitate the survival, self-renewing and differentiation capabilities of stem cells.
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Affiliation(s)
- Chen-Yu Tsai
- Department of Chemical Engineering
- National Taiwan University
- Taipei City 106
- Taiwan
| | - Chih-Ling Lin
- Department of Chemical Engineering
- National Taiwan University
- Taipei City 106
- Taiwan
| | - Nai-Chen Cheng
- Department of Surgery
- National Taiwan University Hospital
- Taipei City 10048
- Republic of China
| | - Jiashing Yu
- Department of Chemical Engineering
- National Taiwan University
- Taipei City 106
- Taiwan
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43
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Kao CW, Cheng PH, Wu PT, Wang SW, Chen IC, Cheng NC, Yang KC, Yu J. Zwitterionic poly(sulfobetaine methacrylate) hydrogels incorporated with angiogenic peptides promote differentiation of human adipose-derived stem cells. RSC Adv 2017. [DOI: 10.1039/c7ra08919h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The superhydrophilic and ultralow biofouling properties as well as the resistance to foreign-body reaction make zwitterionic polymer promising in biomedical applications.
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Affiliation(s)
- Chung-Wei Kao
- Department of Chemical Engineering
- National Taiwan University
- Taipei
- Taiwan
| | - Po-Hsiu Cheng
- Department of Chemical Engineering
- National Taiwan University
- Taipei
- Taiwan
| | - Po-Ting Wu
- Department of Chemical Engineering
- National Taiwan University
- Taipei
- Taiwan
| | - Shih-Wen Wang
- Department of Chemical Engineering
- National Taiwan University
- Taipei
- Taiwan
| | - I.-Chun Chen
- Department of Chemical Engineering
- National Taiwan University
- Taipei
- Taiwan
| | - Nai-Chen Cheng
- National Taiwan University Hospital
- Department of Surgery
- Taipei
- Taiwan
| | - Kai-Chiang Yang
- School of Dental Technology
- College of Oral Medicine
- Taipei Medical University
- Taipei
- Taiwan
| | - Jiashing Yu
- Department of Chemical Engineering
- National Taiwan University
- Taipei
- Taiwan
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44
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Huang TY, Chang CC, Cheng NC, Wang MH, Chiou LL, Lee KL, Lee HS. Re-epithelialization of large wound in paedomorphic and metamorphic axolotls. J Morphol 2016; 278:228-235. [PMID: 27859516 DOI: 10.1002/jmor.20631] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Revised: 10/26/2016] [Accepted: 11/01/2016] [Indexed: 11/11/2022]
Abstract
Axolotls (Ambystoma mexicanum) may heal their skin wounds scar-free in both paedomorphs and metamorphs. In previous studies on small punch skin wounds, rapid re-epithelialisation was noted in these two axolotl morphs. However, large wound size in mammals may affect wound healing. In this study, large circumferential full thickness excision wounds on the hind limbs were created on juvenile paedomorphic and metamorphic axolotls. The results showed re-epithelialisation was more quickly initiated in paedomorphs than in metamorphs after wounding. The migrating rate of epidermis on the wound bed was faster in paedomorphs than in metamorphs and thus completion of re-epithelialisation was faster in paedomorphs than in metamorphs. Within these re-epithelialisation periods, neither basement membrane nor dermis was reformed. Epidermal cell proliferation was detected by EdU-labelling technique. In the normal unwounded skin, epidermal proliferation rate was higher in paedomorphs than in metamorphs. After wounding, the epidermal proliferation rate was significantly lower in the migrating front on the wound bed than in the normal skin in paedomorphs. The EdU-labelling rate between normal skin and migration front was not different in metamorphs. Lacking of more proliferating epidermal cells on the wound bed indicated that the new epidermis here derived rather from migrating epidermal cells than from cell proliferation in situ. In conclusion, re-epithelialisation in the large wound might be fully completed in both morphs despite it was initiated earlier and with faster rate in paedomorphs than in metamorphs. The new epidermis on the wound bed derived mainly from cell migration than by cell proliferation in the re-epithelialisation period. J. Morphol. 278:228-235, 2017. © 2016 Wiley Periodicals,Inc.
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Affiliation(s)
- Ting-Yu Huang
- Liver Disease Prevention and Treatment Research Foundation, Taipei, Taiwan
| | - Chun-Che Chang
- Department of Entomology, College of Bioresources and Agriculture, National Taiwan University, Taipei, Taiwan.,Institute of Biotechnology, College of Bioresources and Agriculture, National Taiwan University, Taipei, Taiwan
| | - Nai-Chen Cheng
- Department of Surgery, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - Mu-Hui Wang
- Institute of Biotechnology, College of Bioresources and Agriculture, National Taiwan University, Taipei, Taiwan
| | - Ling-Ling Chiou
- Liver Disease Prevention and Treatment Research Foundation, Taipei, Taiwan
| | - Kuang-Lun Lee
- Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - Hsuan-Shu Lee
- Institute of Biotechnology, College of Bioresources and Agriculture, National Taiwan University, Taipei, Taiwan.,Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan.,Agricultural Biotechnology Research Center, Academia Sinica, Taipei, Taiwan
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45
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Lee PH, Tu CT, Hsiao CC, Tsai MS, Ho CM, Cheng NC, Hung TM, Shih DTB. Antifibrotic Activity of Human Placental Amnion Membrane-Derived CD34+ Mesenchymal Stem/Progenitor Cell Transplantation in Mice With Thioacetamide-Induced Liver Injury. Stem Cells Transl Med 2016; 5:1473-1484. [PMID: 27405780 DOI: 10.5966/sctm.2015-0343] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Accepted: 04/18/2016] [Indexed: 12/31/2022] Open
Abstract
: Liver fibrosis represents the end stage of chronic liver inflammatory diseases and is defined by the abnormal accumulation of extracellular matrix in the liver. Advanced liver fibrosis results in cirrhosis, liver failure, and portal hypertension. Liver transplantation has been the most effective treatment for these diseases, but the procedure is limited by the shortage of suitable donors. Mesenchymal stromal cells (MSCs) have shown great potential in the treatment of chronic inflammatory diseases associated with fibrosis. This study aimed to evaluate the therapeutic effect of MSC-based cell transplantation as an alternative treatment for liver fibrosis. A CD34-positive subpopulation of human placental amnion membrane-derived stem/progenitor cells (CD34+ AMSPCs) was isolated through the depletion of CD34-negative stromal fibroblasts (CD34- AMSFCs) facilitated by CD34 fluorescence-activated cell sorting, enriched and expanded ex vivo. These cells express pluripotency markers and demonstrate multidirectional differentiation potentials. Comparative analysis was made between CD34+ AMSPCs and CD34- AMSFCs in terms of the expressions of stemness surface markers, embryonic surface antigens, and multilineage differentiation potentials. A mouse model of liver fibrosis was established by thioacetamide (TAA) administration. When injected into the spleen of TAA-injured mice, human placental amnion membrane-derived MSCs (hAM-MSCs) can engraft into the injury site, ameliorate liver fibrosis, and restore liver function, as shown by pathological and blood biochemical analysis and downregulated gene expressions associated with liver damage. CD34+ AMSPCs represent a more primitive subset of hAM-MSCs and could be a suitable candidate with a potentially better safety profile for cell-based therapy in treatment of liver diseases associated with fibrosis. SIGNIFICANCE In this study, a CD34+ subpopulation of stem/progenitor cells derived from neonatal placental amnion membrane, denoted as CD34+ AMSPCs, were identified, enriched, and characterized. These cells are highly proliferative, express mesenchymal stromal cells and pluripotent stem cell markers, and demonstrate multidirectional differentiation potentials, indicating their promising application in clinical regenerative therapies. CD34+ AMSPC transplantation ameliorated liver fibrosis in mice with drug-induced liver injury. These cells represent a potential therapeutic agent for treating liver diseases associated with fibrosis.
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Affiliation(s)
- Po-Huang Lee
- National Taiwan University Hospital, Taipei City, Taiwan, Republic of China
- E-Da Hospital/I-Shou University, Yan-Chau Shiang, Kaohsiung County, Taiwan, Republic of China
| | - Chi-Tang Tu
- National Taiwan University Hospital, Taipei City, Taiwan, Republic of China
| | - Chih-Chiang Hsiao
- Taipei Medical University Hospital, Taipei City, Taiwan, Republic of China
| | - Ming-Song Tsai
- Prenatal Diagnosis Center, Cathay General Hospital, Taipei City, Taiwan, Republic of China
| | - Cheng-Maw Ho
- National Taiwan University Hospital, Taipei City, Taiwan, Republic of China
| | - Nai-Chen Cheng
- National Taiwan University Hospital, Taipei City, Taiwan, Republic of China
| | - Tzu-Min Hung
- National Taiwan University Hospital, Taipei City, Taiwan, Republic of China
- E-Da Hospital/I-Shou University, Yan-Chau Shiang, Kaohsiung County, Taiwan, Republic of China
| | - Daniel Tzu-Bi Shih
- E-Da Hospital/I-Shou University, Yan-Chau Shiang, Kaohsiung County, Taiwan, Republic of China
- Taipei Medical University Hospital, Taipei City, Taiwan, Republic of China
- Innovation Incubation Center, National Taiwan University Hospital, Taipei City, Taiwan, Republic of China
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46
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Chang CW, Tai HC, Cheng NC, Li WT, Lai HS, Chien HF. Risk factors for complications following immediate tissue expander based breast reconstruction in Taiwanese population. J Formos Med Assoc 2016; 116:57-63. [PMID: 26947888 DOI: 10.1016/j.jfma.2016.01.012] [Citation(s) in RCA: 10] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Revised: 01/25/2016] [Accepted: 01/26/2016] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND/PURPOSE Breast cancer patients in Asia show considerable disparities from Caucasian patients, such as younger age of onset and lower rates of smoking, obesity, and diabetes. Findings of prior studies regarding risk factors associated with complications in tissue expander may not hold for Asian populations, since most of these studies involved Caucasian patients. In this study, we surveyed risk factors in the Taiwanese population, providing additional evidence about the important differences and discuss the implications for clinical practice. METHODS Patients who underwent immediate, two-stage, tissue expander breast reconstruction from December 2008 to August 2014 in the National Taiwan University Hospital, Taipei, Taiwan were included. Follow-up observations of all patients were conducted until December 2014. Complications occurring during the tissue expander stage were evaluated. Multivariate regression modeling was used to identify risk factors for complications. RESULTS A total of 246 consecutive, immediate, smooth round tissue expander placements were performed for breast reconstruction. The most common complication was skin necrosis (4.9%), followed by wound dehiscence (4.1%). In the multivariate model, body mass index (BMI) ≥ 24 kg/m2 was the only risk factor that reached statistical significance (odds ratio: 2.41, 95% confidence interval: 1.17-4.96). CONCLUSION We provided evidence that racial disparities have an impact on the risk factors for complications associated with tissue expander breast reconstruction. BMI≥24 kg/m2 was the only risk factor significantly associated with complications. Clinically, BMI≥24 kg/m2, rather than the standard definition of obesity (BMI > 30 kg/m2), may be a more suitable cutoff point for risk in patients of Asian ethnicity.
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Affiliation(s)
- Che-Wei Chang
- Division of Plastic Surgery, Department of Surgery, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan
| | - Hao-Chih Tai
- Division of Plastic Surgery, Department of Surgery, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan
| | - Nai-Chen Cheng
- Division of Plastic Surgery, Department of Surgery, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan
| | - Wei-Tang Li
- Division of Plastic Surgery, Department of Surgery, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan; Division of Plastic Surgery, Department of Surgery, Taipei Medical University Hospital and College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Hong-Shiee Lai
- Division of Pediatric Surgery, Department of Surgery, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan
| | - Hsiung-Fei Chien
- Division of Plastic Surgery, Department of Surgery, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan; Division of Plastic Surgery, Department of Surgery, Taipei Medical University Hospital and College of Medicine, Taipei Medical University, Taipei, Taiwan.
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47
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Cheng NC, Hsieh TY, Lai HS, Young TH. High glucose-induced reactive oxygen species generation promotes stemness in human adipose-derived stem cells. Cytotherapy 2016; 18:371-83. [PMID: 26780864 DOI: 10.1016/j.jcyt.2015.11.012] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Revised: 11/13/2015] [Accepted: 11/16/2015] [Indexed: 02/07/2023]
Abstract
BACKGROUND AIMS Adipose-derived stem cells (ASCs) represent an important source of cell therapy to treat diabetic complications. However, hyperglycemia may alter several cellular functions, so the present study aimed to investigate the influence of a diabetic environment on the stemness and differentiation capabilities of ASCs. METHODS Human ASCs were obtained from subcutaneous adipose tissues of diabetic (dASCs) and nondiabetic donors (nASCs) and characterized. To reproduce an in vitro hyperglycemia environment, the nASCs were also cultured under prolonged high-glucose (HG; 4.5 g/L) or low-glucose (LG; 1.0 g/L) conditions. RESULTS The expression of cell surface markers in dASCs and nASC was similar and characteristic of mesenchymal stem cells. Although dASCs or HG-treated nASCs exhibited decreased proliferation, enhanced expression of the pluripotent markers Sox-2, Oct-4, and Nanog was observed. Moreover, HG-treated nASCs exhibited decreased cell migration, enhanced senescence, and significantly higher intracellular reactive oxygen species (ROS), whereas their adipogenic and osteogenic differentiation capacities remained comparable to LG-treated cells. With antioxidant treatment, HG-treated nASCs showed improved cell proliferative activity without stemness enhancement. This HG-induced biological response was associated with ROS-mediated AKT attenuation. When cultured in an appropriate induction medium, the HG-treated nASCs and dASCs exhibited enhanced potential of transdifferentiation into neuron-like cells. DISCUSSION Despite lower proliferative activity and higher senescence in a diabetic environment, ASCs also exhibit enhanced stemness and neurogenic transdifferentiation potential via a ROS-mediated mechanism. The information is important for future application of autologous ASCs in diabetic patients.
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Affiliation(s)
- Nai-Chen Cheng
- Department of Surgery, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan; Research Center for Developmental Biology and Regenerative Medicine, National Taiwan University, Taipei, Taiwan
| | - Tsung-Yu Hsieh
- Institute of Biomedical Engineering, College of Medicine and College of Engineering, National Taiwan University, Taipei, Taiwan
| | - Hong-Shiee Lai
- Department of Surgery, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan
| | - Tai-Horng Young
- Institute of Biomedical Engineering, College of Medicine and College of Engineering, National Taiwan University, Taipei, Taiwan.
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48
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Cheng NC, Tai HC, Chang SC, Chang CH, Lai HS. Necrotizing fasciitis in patients with diabetes mellitus: clinical characteristics and risk factors for mortality. BMC Infect Dis 2015; 15:417. [PMID: 26463900 PMCID: PMC4604726 DOI: 10.1186/s12879-015-1144-0] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Accepted: 09/23/2015] [Indexed: 12/18/2022] Open
Abstract
Background Necrotizing fasciitis (NF) is a rapidly progressive and life-threatening infection. This study aimed to investigate the clinical characteristics and mortality- associated factors in diabetic patients. Methods Detailed clinical information of 165 NF cases was retrospectively collected and analyzed in National Taiwan University Hospital between January 1997 and February 2013. We documented and compared the clinical features according to the presence of underlying diabetes mellitus, and we identified risk factors associated with mortality. Results There were 84 patients (51 %) with diabetes. The overall case fatality rate was 29.7 %, and we found no significant difference between the patients with or without diabetes. Compared with the nondiabetic patients, diabetic patients were older and exhibited higher serum levels of glucose and potassium on admission. Polymicrobial infection and monomicrobial NF caused by Klebsiella pneumoniae were also more frequently associated with diabetic patients. Moreover, diabetic NF patients exhibit a significantly higher chance of limb loss during hospitalization. In the combined diabetic and nondiabetic cohort, a high serum level of potassium (odds ratio, 2.2; 95 % confidence interval, 1.2 to 4.02; P = 0.011) on admission was independently associated with mortality, whereas positive blood culture on admission was associated with mortality in the diabetic cohort (odds ratio, 7.36; 95 % confidence interval, 1.66 to 32.54; P = 0.009). Conclusions Diabetic patients are more susceptible to NF caused by polymicrobial infection or K. pneumoniae, and they are more likely to receive limb amputation for infection control. Bacteraemia on admission is a significant risk factor for mortality in diabetic NF patients.
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Affiliation(s)
- Nai-Chen Cheng
- Department of Surgery, National Taiwan University Hospital and College of Medicine, 7 Chung-Shan South Road, Taipei, 100, Taiwan.
| | - Hao-Chih Tai
- Department of Surgery, National Taiwan University Hospital and College of Medicine, 7 Chung-Shan South Road, Taipei, 100, Taiwan.
| | - Shan-Chwen Chang
- Department of Internal Medicine, National Taiwan University Hospital and College of Medicine, 7 Chung-Shan South Road, Taipei, 100, Taiwan.
| | - Chin-Hao Chang
- Department of Medical Research, National Taiwan University Hospital and College of Medicine, 7 Chung-Shan South Road, Taipei, 100, Taiwan.
| | - Hong-Shiee Lai
- Department of Surgery, National Taiwan University Hospital and College of Medicine, 7 Chung-Shan South Road, Taipei, 100, Taiwan.
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49
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Wu YL, Lin CW, Cheng NC, Yang KC, Yu J. Modulation of keratin in adhesion, proliferation, adipogenic, and osteogenic differentiation of porcine adipose-derived stem cells. J Biomed Mater Res B Appl Biomater 2015; 105:180-192. [PMID: 26454254 DOI: 10.1002/jbm.b.33551] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [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: 03/04/2015] [Revised: 09/07/2015] [Accepted: 09/27/2015] [Indexed: 11/10/2022]
Abstract
Recently, keratin attracts tremendous interest because of its intrinsic ability to interact with different cells. It has the potential to serve as a controllable extracellular matrix protein that can be used to demonstrate cell mechanism and cell-matrix interaction. However, there have been relatively few studies on the effects of keratin on stem cells. In the present work, we study the effects of human keratin on porcine adipose-derived stem cells (pASCs) and a series of selective cell lines: 3T3 fibroblasts, Madin-Darby canine kidney (MDCK) cells, and MG63 osteoblasts. Relative to un-treated culture plate, our results showed that keratin coating substrates promote cell adhesion and proliferation to above cell lines. Keratin also improved pASCs adhesion, proliferation, and enhanced cell viability. Evaluation of genetic markers showed that adipogenic and osteogenic differentiations of pASCs can be successfully induced, thus demonstrating that keratin did not influence the stemness of pASCs. Furthermore, keratin improved adipogenic differentiations of pASCs in terms of up-regulations in lipoprotein lipase, peroxisome proliferator-activated receptor gamma, and CCAAT-enhancer-binding protein alpha. The osteogenic markers type I collagen, runt-related transcription factor 2, and vitamin D receptor were also upregulated when pASCs cultured on keratin substrates. Therefore, keratin can serve as a biological derived material for surface modification and scaffold fabrication for biomedical purpose. The combination of keratin with stem cells may be a potential candidate for tissue repair in the field of regenerative medicine. © 2015 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 180-192, 2017.
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Affiliation(s)
- Yen-Lin Wu
- Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei, 10617, Taiwan
| | - Che-Wei Lin
- Institute of Biotechnology, National Taiwan University, Taipei, 10617, Taiwan
| | - Nai-Chen Cheng
- Department of Surgery, National Taiwan University Hospital, Taipei, 10031, Taiwan
| | - Kai-Chiang Yang
- School of Dental Technology, College of Oral Medicine, Taipei Medical University, Taipei, 11031, Taiwan.,Graduate Institute of Biomedical Materials & Tissue Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei, 11031, Taiwan
| | - Jiashing Yu
- Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei, 10617, Taiwan
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50
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Lin CY, Wang YR, Lin CW, Wang SW, Chien HW, Cheng NC, Tsai WB, Yu J. Peptide-modified zwitterionic porous hydrogels for endothelial cell and vascular engineering. Biores Open Access 2014; 3:297-310. [PMID: 25469315 PMCID: PMC4245844 DOI: 10.1089/biores.2014.0048] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [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] [Indexed: 12/26/2022] Open
Abstract
Hydrogels allow control of gel composition and mechanics, and permit incorporation of cells and a wide variety of molecules from nanoparticles to micromolecules. Peptide-linked hydrogels should tune the basic polymer into a more bioactive template to influence cellular activities. In this study, we first introduced the generation of 2D poly-(sulfobetaine methacrylate [SBMA]) hydrogel surfaces. By incorporating with functional peptide RGD and vascular endothelial growth factor-mimicking peptide KLTWQELYQLKYKG (QK) peptides, endothelial cells attached to the surface well and proliferated in a short-term culturing. However, the mechanical property, which plays a crucial role directing the cellular functions and supporting the structures, decreased when peptides graft onto hydrogels. Manipulating the mechanical property was thus necessary, and the most related factor was the monomer concentration. From our results, the higher amount of SBMA caused greater stiffness in hydrogels. Following the 2D surface studies, we fabricated 3D porous hydrogels for cell scaffolds by several methods. The salt/particle leaching method showed a more reliable way than gas-foaming method to fabricate homogeneous and open-interconnected pores within the hydrogel. Using the salt/particle leaching method, we can control the pore size before leaching. Morphology of endothelial cells within scaffolds was also investigated by scanning electron microscopy, and histological analysis was conducted in vitro and in vivo to test the biocompatibility of SB hydrogel and its potential as a therapeutic reagent for ischemic tissue repair in mice.
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Affiliation(s)
- Chih-Yeh Lin
- Department of Chemical Engineering, National Taiwan University , Taipei, Taiwan
| | - Yi-Ren Wang
- Department of Chemical Engineering, National Taiwan University , Taipei, Taiwan
| | - Che-Wei Lin
- Department of Chemical Engineering, National Taiwan University , Taipei, Taiwan
| | - Shih-Wen Wang
- Department of Chemical Engineering, National Taiwan University , Taipei, Taiwan
| | - Hsiu-Wen Chien
- Department of Chemical Engineering, National Taiwan University , Taipei, Taiwan
| | - Nai-Chen Cheng
- Department of Chemical Engineering, National Taiwan University , Taipei, Taiwan
| | - Wei-Bor Tsai
- Department of Chemical Engineering, National Taiwan University , Taipei, Taiwan
| | - Jiashing Yu
- Department of Chemical Engineering, National Taiwan University , Taipei, Taiwan
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