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Bindi B, Perioli A, Melo P, Mattu C, Ferreira AM. Bioinspired Collagen/Hyaluronic Acid/Fibrin-Based Hydrogels for Soft Tissue Engineering: Design, Synthesis, and In Vitro Characterization. J Funct Biomater 2023; 14:495. [PMID: 37888160 PMCID: PMC10607851 DOI: 10.3390/jfb14100495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 09/12/2023] [Accepted: 09/16/2023] [Indexed: 10/28/2023] Open
Abstract
A major challenge for future drug development comprises finding alternative models for drug screening. The use of animal models in research is highly controversial, with an ongoing debate on their ethical acceptability. Also, animal models are often poorly predictive of therapeutic outcomes due to the differences between animal and human physiological environments. In this study, we aimed to develop a biomimetic hydrogel that replicates the composition of skin for potential use in in vitro modeling within tissue engineering. The hydrogel was fabricated through the crosslinking of collagen type I, hyaluronic acid, four-arm PEG succinimidyl glutarate (4S-StarPEG), and fibrinogen. Various ratios of these components were systematically optimized to achieve a well-interconnected porosity and desirable rheological properties. To evaluate the hydrogel's cytocompatibility, fibroblasts were embedded within the matrix. The resulting hydrogel exhibited promising properties as a scaffold, also facilitating the growth of and proliferation of the cells. This biomimetic hydrogel holds great potential for tissue engineering applications, particularly in skin regeneration and cancer research. The study used melanoma spheroids fabricated using the 96-round bottom well plate method as a potential application. The results demonstrate that the developed hydrogels allowed the maintenance of spheroid integrity and viability, meaning it has a promising use as a three-dimensional in vitro model of melanoma for both tissue engineering and drug screening applications.
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Affiliation(s)
- Bianca Bindi
- School of Engineering, Newcastle University, Newcastle upon Tyne NE1 7RU, UK
| | - Annalisa Perioli
- School of Engineering, Newcastle University, Newcastle upon Tyne NE1 7RU, UK
| | - Priscila Melo
- School of Engineering, Newcastle University, Newcastle upon Tyne NE1 7RU, UK
| | - Clara Mattu
- Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy
| | - Ana Marina Ferreira
- School of Engineering, Newcastle University, Newcastle upon Tyne NE1 7RU, UK
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2
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Wilkus-Adamczyk K, Brodaczewska K, Majewska A, Kieda C. Microenvironment commits breast tumor ECs to dedifferentiation by micro-RNA-200-b-3p regulation and extracellular matrix remodeling. Front Cell Dev Biol 2023; 11:1125077. [PMID: 37261072 PMCID: PMC10229062 DOI: 10.3389/fcell.2023.1125077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Accepted: 04/27/2023] [Indexed: 06/02/2023] Open
Abstract
Introduction: Hypoxia shapes the tumor microenvironment, modulates distinct cell population activities, and activates pathological angiogenesis in cancer, where endothelial cells (ECs) are the most important players. This study aimed to evidence the influences of the tumor microenvironment on the global gene expression pattern characteristic for ECs and the distinct responses displayed by tumor-derived ECs in comparison to the healthy endothelium during endothelial to mesenchymal transition (EndMT) and its regulation by miR-200-b-3p. Methodology: Immortalized lines of ECs from the same patient with breast cancer, healthy breast tissue (HBH.MEC), and primary tumor (HBCa.MEC) were used. The experiments were performed in normoxia and hypoxia for 48 h. By using the wound healing test, we investigated the migration abilities of ECs. Global gene expression analysis with NGS was carried out to detect new pathways altered in pathological ECs and find the most changed miRNAs. The validation of NGS data from RNA and miRNA was estimated by qPCRs. Mimic miR-200b-3p was used in HBH.MEC, and the targets VEGF, Bcl2, ROCK2, and SP1 were checked. Results: Hypoxia influences EC migration properties in wound healing assays. In hypoxia, healthy ECs migrate slower than they do in normoxia, as opposed to HBCa.MEC, where no decreased migration ability is induced by hypoxia due to EndMT features. NGS data identified this process to be altered in cancer ECs through extracellular matrix (ECM) organization. The deregulated genes, validated by qPCR, included SPP1, ITGB6, COL4A4, ADAMST2, LAMA1, GAS6, PECAM1, ELN, FBLN2, COL6A3, and COL9A3. NGS also identified collagens, laminins, fibronectins, and integrins, as being deregulated in tumor-derived ECs. Moreover, the analysis of the 10 most intensively modified miRNAs, when breast tumor-derived ECs were compared to healthy ECs, shed light on miR-200b-3p, which is strongly upregulated in HBCa.MECs when compared to HBH.MECs. Discussion and conclusion: The pathological ECs differed significantly, both phenotypically and functionally, from the normal corresponding tissue, thus influencing their microenvironment cross-talk. The gene expression profile confirms the EndMT phenotype of tumor-derived ECs and migratory properties acquisition. Moreover, it indicates the role of miR-200b-3p, that is, regulating EndMT in pathological ECs and silencing several angiogenic growth factors and their receptors by directly targeting their mRNA transcripts.
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Affiliation(s)
- Kinga Wilkus-Adamczyk
- Laboratory of Molecular Oncology and Innovative Therapies, Military Institute of Medicine- National Research Institute, Warsaw, Poland
- Postgraduate School of Molecular Medicine, Medical University of Warsaw, Warsaw, Poland
| | - Klaudia Brodaczewska
- Laboratory of Molecular Oncology and Innovative Therapies, Military Institute of Medicine- National Research Institute, Warsaw, Poland
| | - Aleksandra Majewska
- Laboratory of Molecular Oncology and Innovative Therapies, Military Institute of Medicine- National Research Institute, Warsaw, Poland
- Postgraduate School of Molecular Medicine, Medical University of Warsaw, Warsaw, Poland
| | - Claudine Kieda
- Laboratory of Molecular Oncology and Innovative Therapies, Military Institute of Medicine- National Research Institute, Warsaw, Poland
- Center for Molecular Biophysics UPR 4301 CNRS, Orleans, France
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Peng X, Zhu Y, Wu Y, Xiang X, Deng M, Liu L, Li T, Yang G. Genistein, a Soybean Isoflavone, Promotes Wound Healing by Enhancing Endothelial Progenitor Cell Mobilization in Rats with Hemorrhagic Shock. Adv Biol (Weinh) 2023; 7:e2200236. [PMID: 36634922 DOI: 10.1002/adbi.202200236] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 11/04/2022] [Indexed: 01/14/2023]
Abstract
Severe trauma and hemorrhaging are often accompanied by delayed cutaneous wound healing. Soybean isoflavone is a natural phytoestrogen that has attracted great attention due to its protective effects against various injuries. Endothelial progenitor cells (EPCs) are precursor cells with directional differentiation characteristics. This study is to determine whether genistein (GEN), an isoflavone in soybean products, benefits wound healing in hemorrhagic shock (HS) rats by promoting EPC homing and to investigate the underlying mechanisms. In this study, it is found that GEN promotes skin wound healing in HS rats, which is due at least partly to the mobilization of endogenous EPCs to the injury site via angiotensin II (Ang-II), stromal cell-derived factor-1alpha (SDF-1α), and transforming growth factor beta(TGF-β) signaling.
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Affiliation(s)
- Xiaoyong Peng
- Department of Shock and Transfusion, Research Institute of Surgery, State Key Laboratory of Trauma, Burns and Combined Injury, Daping Hospital, Army Medical University, Chongqing, 400042, P. R. China
| | - Yu Zhu
- Department of Shock and Transfusion, Research Institute of Surgery, State Key Laboratory of Trauma, Burns and Combined Injury, Daping Hospital, Army Medical University, Chongqing, 400042, P. R. China
| | - Yue Wu
- Department of Shock and Transfusion, Research Institute of Surgery, State Key Laboratory of Trauma, Burns and Combined Injury, Daping Hospital, Army Medical University, Chongqing, 400042, P. R. China
| | - Xinming Xiang
- Department of Shock and Transfusion, Research Institute of Surgery, State Key Laboratory of Trauma, Burns and Combined Injury, Daping Hospital, Army Medical University, Chongqing, 400042, P. R. China
| | - Mengsheng Deng
- Department of Weapon Bioeffect Assessment, Research Institute of Surgery, State Key Laboratory of Trauma, Burns and Combined Injury, Daping Hospital, Army Medical University, Chongqing, 400042, P. R. China
| | - Liangming Liu
- Department of Shock and Transfusion, Research Institute of Surgery, State Key Laboratory of Trauma, Burns and Combined Injury, Daping Hospital, Army Medical University, Chongqing, 400042, P. R. China
| | - Tao Li
- Department of Shock and Transfusion, Research Institute of Surgery, State Key Laboratory of Trauma, Burns and Combined Injury, Daping Hospital, Army Medical University, Chongqing, 400042, P. R. China
| | - Guangming Yang
- Department of Weapon Bioeffect Assessment, Research Institute of Surgery, State Key Laboratory of Trauma, Burns and Combined Injury, Daping Hospital, Army Medical University, Chongqing, 400042, P. R. China
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4
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Khanna A, Zamani M, Huang NF. Extracellular Matrix-Based Biomaterials for Cardiovascular Tissue Engineering. J Cardiovasc Dev Dis 2021; 8:137. [PMID: 34821690 PMCID: PMC8622600 DOI: 10.3390/jcdd8110137] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 10/10/2021] [Accepted: 10/19/2021] [Indexed: 12/12/2022] Open
Abstract
Regenerative medicine and tissue engineering strategies have made remarkable progress in remodeling, replacing, and regenerating damaged cardiovascular tissues. The design of three-dimensional (3D) scaffolds with appropriate biochemical and mechanical characteristics is critical for engineering tissue-engineered replacements. The extracellular matrix (ECM) is a dynamic scaffolding structure characterized by tissue-specific biochemical, biophysical, and mechanical properties that modulates cellular behavior and activates highly regulated signaling pathways. In light of technological advancements, biomaterial-based scaffolds have been developed that better mimic physiological ECM properties, provide signaling cues that modulate cellular behavior, and form functional tissues and organs. In this review, we summarize the in vitro, pre-clinical, and clinical research models that have been employed in the design of ECM-based biomaterials for cardiovascular regenerative medicine. We highlight the research advancements in the incorporation of ECM components into biomaterial-based scaffolds, the engineering of increasingly complex structures using biofabrication and spatial patterning techniques, the regulation of ECMs on vascular differentiation and function, and the translation of ECM-based scaffolds for vascular graft applications. Finally, we discuss the challenges, future perspectives, and directions in the design of next-generation ECM-based biomaterials for cardiovascular tissue engineering and clinical translation.
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Affiliation(s)
| | - Maedeh Zamani
- Department of Cardiothoracic Surgery, Stanford University, Stanford, CA 94305, USA;
- Stanford Cardiovascular Institute, Stanford University, Stanford, CA 94305, USA
| | - Ngan F. Huang
- Department of Cardiothoracic Surgery, Stanford University, Stanford, CA 94305, USA;
- Stanford Cardiovascular Institute, Stanford University, Stanford, CA 94305, USA
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305, USA
- Veterans Affairs Palo Alto Health Care System, Palo Alto, CA 94304, USA
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5
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Hosseini M, Shafiee A. Engineering Bioactive Scaffolds for Skin Regeneration. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2101384. [PMID: 34313003 DOI: 10.1002/smll.202101384] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 03/24/2021] [Indexed: 06/13/2023]
Abstract
Large skin wounds pose a major clinical challenge. Scarcity of donor site and postsurgical scarring contribute to the incomplete or partial loss of function and aesthetic concerns in skin wound patients. Currently, a wide variety of skin grafts are being applied in clinical settings. Scaffolds are used to overcome the issues related to the misaligned architecture of the repaired skin tissues. The current review summarizes the contribution of biomaterials to wound healing and skin regeneration and addresses the existing limitations in skin grafting. Then, the clinically approved biologic and synthetic skin substitutes are extensively reviewed. Next, the techniques for modification of skin grafts aiming for enhanced tissue regeneration are outlined, and a summary of different growth factor delivery systems using biomaterials is presented. Considering the significant progress in biomaterial science and manufacturing technologies, the idea of biomaterial-based skin grafts with the ability for scarless wound healing and reconstructing full skin organ is more achievable than ever.
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Affiliation(s)
- Motaharesadat Hosseini
- Institute of Health and Biomedical Innovation, Queensland University of Technology (QUT), Kelvin Grove, Brisbane, QLD, 4059, Australia
| | - Abbas Shafiee
- Herston Biofabrication Institute, Metro North Hospital and Health Service, Brisbane, QLD, 4029, Australia
- Royal Brisbane and Women's Hospital, Metro North Hospital and Health Service, Brisbane, QLD, 4029, Australia
- UQ Diamantina Institute, Translational Research Institute, The University of Queensland, Brisbane, QLD, 4102, Australia
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Wei C, Feng Y, Che D, Zhang J, Zhou X, Shi Y, Wang L. Biomaterials in skin tissue engineering. INT J POLYM MATER PO 2021. [DOI: 10.1080/00914037.2021.1933977] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Chao Wei
- Mechanical and Automotive Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, China
| | - Yihua Feng
- Mechanical and Automotive Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, China
| | - Dezhao Che
- Mechanical and Automotive Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, China
| | - Jiahui Zhang
- Mechanical and Automotive Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, China
| | - Xuan Zhou
- Mechanical and Automotive Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, China
| | - Yanbin Shi
- Mechanical and Automotive Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, China
| | - Li Wang
- Mechanical and Automotive Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, China
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7
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Trombino S, Curcio F, Cassano R, Curcio M, Cirillo G, Iemma F. Polymeric Biomaterials for the Treatment of Cardiac Post-Infarction Injuries. Pharmaceutics 2021; 13:1038. [PMID: 34371729 PMCID: PMC8309168 DOI: 10.3390/pharmaceutics13071038] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 06/29/2021] [Accepted: 07/05/2021] [Indexed: 02/06/2023] Open
Abstract
Cardiac regeneration aims to reconstruct the heart contractile mass, preventing the organ from a progressive functional deterioration, by delivering pro-regenerative cells, drugs, or growth factors to the site of injury. In recent years, scientific research focused the attention on tissue engineering for the regeneration of cardiac infarct tissue, and biomaterials able to anatomically and physiologically adapt to the heart muscle have been proposed as valuable tools for this purpose, providing the cells with the stimuli necessary to initiate a complete regenerative process. An ideal biomaterial for cardiac tissue regeneration should have a positive influence on the biomechanical, biochemical, and biological properties of tissues and cells; perfectly reflect the morphology and functionality of the native myocardium; and be mechanically stable, with a suitable thickness. Among others, engineered hydrogels, three-dimensional polymeric systems made from synthetic and natural biomaterials, have attracted much interest for cardiac post-infarction therapy. In addition, biocompatible nanosystems, and polymeric nanoparticles in particular, have been explored in preclinical studies as drug delivery and tissue engineering platforms for the treatment of cardiovascular diseases. This review focused on the most employed natural and synthetic biomaterials in cardiac regeneration, paying particular attention to the contribution of Italian research groups in this field, the fabrication techniques, and the current status of the clinical trials.
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Affiliation(s)
| | | | - Roberta Cassano
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende, CS, Italy; (S.T.); (F.C.); (G.C.); (F.I.)
| | - Manuela Curcio
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende, CS, Italy; (S.T.); (F.C.); (G.C.); (F.I.)
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8
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Liu K, Han S, Gao W, Tang Y, Han X, Liu Z, Bao L, Zhi M, Wang H, Wang Y, Du H. Changes of Mineralogical Properties and Biological Activities of Gypsum and Its Calcined Products with Different Phase Structures. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2021; 2021:6676797. [PMID: 33777161 PMCID: PMC7969087 DOI: 10.1155/2021/6676797] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 02/11/2021] [Accepted: 02/24/2021] [Indexed: 12/25/2022]
Abstract
Raw gypsum (RG) and calcined gypsum (CG) are widely used in traditional Chinese medicine (TCM). RG is usually taken orally to resolve heat and diminish inflammation, while CG is only used externally to treat ulcerations and empyrosis. Calcination at different temperatures, three phase CG structures, namely, bassanite, anhydrite III, and anhydrite II, may be generated. We herein investigated the relationship between the phase structure and the efficacy of CG and the optimum phase structure for CG. RG has a compact structure, small pore size, weak anti-inflammatory effect, but no antibacterial effect, and has almost no effect on the repair of scalds. CG150 (bassanite) has a loose texture, large pore size and specific surface area, and certain antibacterial and anti-inflammatory effects, but it has a poor repair effect on scalds. CG750 (anhydrite II) has a compact structure, small pore size and specific surface area, and low antibacterial and anti-inflammatory effects, but it has a certain repair effect on scalds. Only CG350 (anhydrite III) has good performance in texture, pore size, specific surface area, antibacterial, anti-inflammatory, and scald repair. Our research has proved that the mineral properties and biological activities of CG are different due to different phase structures. CG350, namely, anhydrite III, is considered by our research to be the optimal phase structure as CG.
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Affiliation(s)
- Kaiyang Liu
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Shu Han
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Wei Gao
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Ya'nan Tang
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Xitao Han
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Ziqin Liu
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Liyuan Bao
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Meiru Zhi
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Hongyue Wang
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Yingli Wang
- Shanxi University of Chinese Medicine, Jinzhong, Shanxi 030619, China
| | - Hong Du
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 102488, China
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9
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Kim YS, Lee HY, Jang JY, Lee HR, Shin YS, Kim CH. Redox treatment ameliorates diabetes mellitus-induced skin flap necrosis via inhibiting apoptosis and promoting neoangiogenesis. Exp Biol Med (Maywood) 2021; 246:718-728. [PMID: 33706582 PMCID: PMC7988729 DOI: 10.1177/1535370220974269] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Accepted: 10/27/2020] [Indexed: 01/13/2023] Open
Abstract
Intractable wound healing is the habitual problem of diabetes mellitus. High blood glucose limits wound healing by interrupting inflammatory responses and inhibiting neoangiogenesis. Oxidative stress is commonly thought to be a major pathogenic cause of diabetic complications. Edaravone (3-methyl-1-phenyl-2-pyrazolin-5-one, EDV) is a free radical scavenger which suppress oxidative stress. This study investigates whether EDV can reduce oxidative stress in wound healing HaCaT/human dermal fibroblasts cells (HDFs) in vitro and in vivo animal model. Cell viability and wound healing assays, FACS flow cytometry, and Hoechst 33342 staining were performed to confirm apoptosis and cytotoxicity in H2O2 and EDV-treated HaCaT and HDFs. A streptozotocin-induced hyperglycemic animal model was made in adult C57BL6 mice. Full-thickness skin flap was made on dorsomedial back and re-sutured to evaluate the wound healing process. EDV was delivered slowly in the skin flap with degradable fibrin glue. The flap was monitored and analyzed on postoperative days 1, 3, and 5. CD31/DAPI staining was done to detect newly formed blood vessels. The expression levels of NF-κB, bcl-2, NOX3, and STAT3 proteins in C57BL6 mouse tissues were also examined. The wound healing process in hyper- and normoglycemic mice showed a difference in protein expression, especially in oxidative stress management and angiogenesis. Exogenous H2O2 reduced cell viability in a proportion to the concentration via apoptosis. EDV protected HaCaT cells and HDFs from H2O2 induced reactive oxygen species cell damage and apoptosis. In the mouse model, EDV with fibrin resulted in less necrotic areas and increased angiogenesis on postoperative day 5, compared to sham-treated mice. Our results indicate that EDV could protect H2O2-induced cellular injury via inhibiting early apoptosis and inflammation and also increasing angiogenesis. EDV might be valuable in the treatment of diabetic wounds that oxidative stress has been implicated.
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Affiliation(s)
- Yeon S Kim
- Department of Otorhinolaryngology, College of Medicine, Konyang University Hospital, Konyang University, Daejeon 35365, Korea
| | - Hye-Young Lee
- Department of Otolaryngology, School of Medicine, Ajou University, Suwon 16499, Korea
| | - Jeon Y Jang
- Department of Otolaryngology, School of Medicine, Ajou University, Suwon 16499, Korea
| | - Hye R Lee
- Department of Otolaryngology, School of Medicine, Ajou University, Suwon 16499, Korea
| | - Yoo S Shin
- Department of Otolaryngology, School of Medicine, Ajou University, Suwon 16499, Korea
| | - Chul-Ho Kim
- Department of Otolaryngology, School of Medicine, Ajou University, Suwon 16499, Korea
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Next-generation tissue-engineered heart valves with repair, remodelling and regeneration capacity. Nat Rev Cardiol 2020; 18:92-116. [PMID: 32908285 DOI: 10.1038/s41569-020-0422-8] [Citation(s) in RCA: 111] [Impact Index Per Article: 27.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/09/2020] [Indexed: 02/06/2023]
Abstract
Valvular heart disease is a major cause of morbidity and mortality worldwide. Surgical valve repair or replacement has been the standard of care for patients with valvular heart disease for many decades, but transcatheter heart valve therapy has revolutionized the field in the past 15 years. However, despite the tremendous technical evolution of transcatheter heart valves, to date, the clinically available heart valve prostheses for surgical and transcatheter replacement have considerable limitations. The design of next-generation tissue-engineered heart valves (TEHVs) with repair, remodelling and regenerative capacity can address these limitations, and TEHVs could become a promising therapeutic alternative for patients with valvular disease. In this Review, we present a comprehensive overview of current clinically adopted heart valve replacement options, with a focus on transcatheter prostheses. We discuss the various concepts of heart valve tissue engineering underlying the design of next-generation TEHVs, focusing on off-the-shelf technologies. We also summarize the latest preclinical and clinical evidence for the use of these TEHVs and describe the current scientific, regulatory and clinical challenges associated with the safe and broad clinical translation of this technology.
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11
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Lim X, Potter M, Cui Z, Dye JF. Manufacture and characterisation of EmDerm-novel hierarchically structured bio-active scaffolds for tissue regeneration. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2018; 29:79. [PMID: 29872930 PMCID: PMC5988793 DOI: 10.1007/s10856-018-6060-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Accepted: 04/13/2018] [Indexed: 05/27/2023]
Abstract
There are significant challenges for using emulsion templating as a method of manufacturing macro-porous protein scaffolds. Issues include protein denaturation by adsorption at hydrophobic interfaces, emulsion instability, oil droplet and surfactant removal after protein gelation, and compatible cross-linking methods. We investigated an oil-in-water macro-emulsion stabilised with a surfactant blend, as a template for manufacturing protein-based nano-structured bio-intelligent scaffolds (EmDerm) with tuneable micro-scale porosity for tissue regeneration. Prototype EmDerm scaffolds were made using either collagen, through thermal gelation, fibrin, through enzymatic coagulation or collagen-fibrin composite. Pore size was controlled via surfactant-to-oil phase ratio. Scaffolds were crosslink-stabilised with EDC/NHS for varying durations. Scaffold micro-architecture and porosity were characterised with SEM, and mechanical properties by tensiometry. Hydrolytic and proteolytic degradation profiles were quantified by mass decrease over time. Human dermal fibroblasts, endothelial cells and bone marrow derived mesenchymal stem cells were used to investigate cytotoxicity and cell proliferation within each scaffold. EmDerm scaffolds showed nano-scale based hierarchical structures, with mean pore diameters ranging from 40-100 microns. The Young's modulus range was 1.1-2.9 MPa, and ultimate tensile strength was 4-16 MPa. Degradation rate was related to cross-linking duration. Each EmDerm scaffold supported excellent cell ingress and proliferation compared to the reference materials Integra™ and Matriderm™. Emulsion templating is a novel rapid method of fabricating nano-structured fibrous protein scaffolds with micro-scale pore dimensions. These scaffolds hold promising clinical potential for regeneration of the dermis and other soft tissues, e.g., for burns or chronic wound therapies.
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Affiliation(s)
- Xuxin Lim
- Tissue Engineering Group, Institute of Biomedical Engineering, Department of Engineering Science, University of Oxford, ORCRB, Roosevelt Drive, Headington, Oxford, OX3 7DQ, UK
| | - Matthew Potter
- Department of Plastic Surgery, Oxford University Hospitals NHS Foundation Trust, West Wing, John Radcliffe Hospital, Headington, Oxford, OX9 9DU, UK
| | - Zhanfeng Cui
- Tissue Engineering Group, Institute of Biomedical Engineering, Department of Engineering Science, University of Oxford, ORCRB, Roosevelt Drive, Headington, Oxford, OX3 7DQ, UK
| | - Julian F Dye
- Tissue Engineering Group, Institute of Biomedical Engineering, Department of Engineering Science, University of Oxford, ORCRB, Roosevelt Drive, Headington, Oxford, OX3 7DQ, UK.
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12
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Udhayakumar S, Shankar KG, Sowndarya S, Rose C. Novel fibrous collagen-based cream accelerates fibroblast growth for wound healing applications: in vitro and in vivo evaluation. Biomater Sci 2018; 5:1868-1883. [PMID: 28676877 DOI: 10.1039/c7bm00331e] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The present study reports the development of a novel film-forming bovine collagenous cream (BCC) based on bovine collagen (BC). In this study, collagen was isolated from bovine forestomach tissue, a novel source, and a cream formulation was prepared using some other bioactive ingredients. The electrophoretic pattern of the BC was found to be similar to type I collagen. The purity of BC was examined by amino acid analysis, which confirmed the presence of atelocollagen. The physicochemical properties of BCC such as rheology, spreadability, and temperature stability were characterized. The antimicrobial activity was examined against Bacillus subtilis, Staphylococcus aureus, and Escherichia coli, and BCC displayed excellent inhibitory effect. In vitro biocompatibility studies using NIH 3T3 fibroblast cells showed enhanced cell viability. FACS analysis revealed the non-toxic nature of BCC toward cells. The cell morphology and proliferation on the BCC matrix was studied using SEM and fluorescence microscopy. The in vivo wound healing efficacy of the BCC as a topical wound dressing was demonstrated on full thickness excision wounds in rat models. The healing profile showed that the BCC significantly enhanced re-epithelialization, collagen deposition, and contraction in the wound healing process. The findings of this study provide a new opportunity for the utilization of the untapped byproducts of the meat industry for valorization. We expect that this kind of topical healing cream could be a potential candidate in wound management and future clinical needs.
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Affiliation(s)
- Sivalingam Udhayakumar
- Department of Biochemistry and Biotechnology, CSIR-Central Leather Research Institute, Chennai 600020, India.
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Abstract
The normal wound healing process involves a well-organized cascade of biological pathways and any failure in this process leads to wounds becoming chronic. Non-healing wounds are a burden on healthcare systems and set to increase with aging population and growing incidences of obesity and diabetes. Stem cell-based therapies have the potential to heal chronic wounds but have so far seen little success in the clinic. Current research has been focused on using polymeric biomaterial systems that can act as a niche for these stem cells to improve their survival and paracrine activity that would eventually promote wound healing. Furthermore, different modification strategies have been developed to improve stem cell survival and differentiation, ultimately promoting regenerative wound healing. This review focuses on advanced polymeric scaffolds that have been used to deliver stem cells and have been tested for their efficiency in preclinical animal models of wounds.
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Huang J, Huang K, You X, Liu G, Hollett G, Kang Y, Gu Z, Wu J. Evaluation of tofu as a potential tissue engineering scaffold. J Mater Chem B 2018; 6:1328-1334. [DOI: 10.1039/c7tb02852k] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Tofu not only is a delicious vegetarian food, but also shows potential biomedical applications for its high protein content and typical porous scaffold structure.
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Affiliation(s)
- Jun Huang
- Key Laboratory of Sensing Technology and Biomedical Instrument of Guangdong Province
- School of Engineering
- Sun Yat-sen University
- Guangzhou
- P. R. China
| | - Keqin Huang
- Key Laboratory of Sensing Technology and Biomedical Instrument of Guangdong Province
- School of Engineering
- Sun Yat-sen University
- Guangzhou
- P. R. China
| | - Xinru You
- Key Laboratory of Sensing Technology and Biomedical Instrument of Guangdong Province
- School of Engineering
- Sun Yat-sen University
- Guangzhou
- P. R. China
| | - Guiting Liu
- Key Laboratory of Sensing Technology and Biomedical Instrument of Guangdong Province
- School of Engineering
- Sun Yat-sen University
- Guangzhou
- P. R. China
| | - Geoffrey Hollett
- Materials Science and Engineering Program
- University of California San Diego
- La Jolla
- USA
| | - Yang Kang
- Key Laboratory of Sensing Technology and Biomedical Instrument of Guangdong Province
- School of Engineering
- Sun Yat-sen University
- Guangzhou
- P. R. China
| | - Zhipeng Gu
- Key Laboratory of Sensing Technology and Biomedical Instrument of Guangdong Province
- School of Engineering
- Sun Yat-sen University
- Guangzhou
- P. R. China
| | - Jun Wu
- Key Laboratory of Sensing Technology and Biomedical Instrument of Guangdong Province
- School of Engineering
- Sun Yat-sen University
- Guangzhou
- P. R. China
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15
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Effects of various monomers and micro-structure of polyhydroxyalkanoates on the behavior of endothelial progenitor cells and endothelial cells for vascular tissue engineering. JOURNAL OF POLYMER RESEARCH 2017. [DOI: 10.1007/s10965-017-1341-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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16
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Li R, Pang Z, He H, Lee S, Qin J, Wu J, Pang L, Wang J, Yang VC. Drug depot-anchoring hydrogel: A self-assembling scaffold for localized drug release and enhanced stem cell differentiation. J Control Release 2017; 261:234-245. [PMID: 28694033 DOI: 10.1016/j.jconrel.2017.07.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Revised: 06/26/2017] [Accepted: 07/06/2017] [Indexed: 12/30/2022]
Abstract
Localized and long-term delivery of growth factors has been a long-standing challenge for stem cell-based tissue engineering. In the current study, a polymeric drug depot-anchoring hydrogel scaffold was developed for the sustained release of macromolecules to enhance the differentiation of stem cells. Self-assembling peptide (RADA16)-modified drug depots (RDDs) were prepared and anchored to a RADA16 hydrogel. The anchoring effect of RADA16 modification on the RDDs was tested both in vitro and in vivo. It was shown that the in vitro leakage of RDDs from the RADA16 hydrogel was significantly less than that of the unmodified drug depots (DDs). In addition, the in vivo retention of injected hydrogel-incorporated RDDs was significantly longer than that of hydrogel-incorporated unmodified DDs. A model drug, vascular endothelial growth factor (VEGF), was encapsulated in RDDs (V-RDDs) as drug depot that was then anchored to the hydrogel. The release of VEGF could be sustained for 4weeks. Endothelial progenitor cells (EPCs) were cultured on the V-RDDs-anchoring scaffold and enhanced cell proliferation and differentiation were observed, compared with a VEGF-loaded scaffold. Furthermore, this scaffold laden with EPCs promoted neovascularization in an animal model of hind limb ischemia. These results demonstrate that self-assembling hydrogel-anchored drug-loaded RDDs are promising for localized and sustained drug release, and can effectively enhance the proliferation and differentiation of resident stem cells, thus lead to successful tissue regeneration.
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Affiliation(s)
- Ruixiang Li
- School of Pharmacy, Fudan University, Key Laboratory of Smart Drug Delivery, Ministry of Education, Shanghai 201203, China
| | - Zhiqing Pang
- School of Pharmacy, Fudan University, Key Laboratory of Smart Drug Delivery, Ministry of Education, Shanghai 201203, China
| | - Huining He
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin 300070, China
| | - Seungjin Lee
- College of Pharmacy, Ewha Women's University, Seoul 03760, Republic of Korea
| | - Jing Qin
- School of Pharmacy, Fudan University, Key Laboratory of Smart Drug Delivery, Ministry of Education, Shanghai 201203, China
| | - Jian Wu
- School of Pharmacy, Fudan University, Key Laboratory of Smart Drug Delivery, Ministry of Education, Shanghai 201203, China
| | - Liang Pang
- School of Pharmacy, Fudan University, Key Laboratory of Smart Drug Delivery, Ministry of Education, Shanghai 201203, China
| | - Jianxin Wang
- School of Pharmacy, Fudan University, Key Laboratory of Smart Drug Delivery, Ministry of Education, Shanghai 201203, China.
| | - Victor C Yang
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin 300070, China; College of Pharmacy, University of Michigan, Ann Arbor, MI 48109-1065, USA.
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17
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Singaravelu S, Ramanathan G, Sivagnanam UT. Dual-layered 3D nanofibrous matrix incorporated with dual drugs and their synergetic effect on accelerating wound healing through growth factor regulation. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 76:37-49. [DOI: 10.1016/j.msec.2017.02.148] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2016] [Revised: 12/16/2016] [Accepted: 02/24/2017] [Indexed: 12/29/2022]
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18
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Ho J, Walsh C, Yue D, Dardik A, Cheema U. Current Advancements and Strategies in Tissue Engineering for Wound Healing: A Comprehensive Review. Adv Wound Care (New Rochelle) 2017; 6:191-209. [PMID: 28616360 PMCID: PMC5467128 DOI: 10.1089/wound.2016.0723] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Accepted: 02/09/2017] [Indexed: 12/20/2022] Open
Abstract
Significance: With an aging population leading to an increase in diabetes and associated cutaneous wounds, there is a pressing clinical need to improve wound-healing therapies. Recent Advances: Tissue engineering approaches for wound healing and skin regeneration have been developed over the past few decades. A review of current literature has identified common themes and strategies that are proving successful within the field: The delivery of cells, mainly mesenchymal stem cells, within scaffolds of the native matrix is one such strategy. We overview these approaches and give insights into mechanisms that aid wound healing in different clinical scenarios. Critical Issues: We discuss the importance of the biomimetic niche, and how recapitulating elements of the native microenvironment of cells can help direct cell behavior and fate. Future Directions: It is crucial that during the continued development of tissue engineering in wound repair, there is close collaboration between tissue engineers and clinicians to maintain the translational efficacy of this approach.
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Affiliation(s)
- Jasmine Ho
- UCL Division of Surgery and Interventional Sciences, UCL Institute for Orthopaedics and Musculoskeletal Sciences, University College London, London, United Kingdom
| | - Claire Walsh
- UCL Division of Surgery and Interventional Sciences, UCL Institute for Orthopaedics and Musculoskeletal Sciences, University College London, London, United Kingdom
| | - Dominic Yue
- Department of Plastic and Reconstructive Surgery, Royal Stoke University Hospital, Stoke-on-Trent, United Kingdom
| | - Alan Dardik
- The Vascular Biology and Therapeutics Program and the Department of Surgery, Yale University School of Medicine, New Haven, Connecticut
| | - Umber Cheema
- UCL Division of Surgery and Interventional Sciences, UCL Institute for Orthopaedics and Musculoskeletal Sciences, University College London, London, United Kingdom
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19
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Shi X, Zhang W, Yin L, Chilian WM, Krieger J, Zhang P. Vascular precursor cells in tissue injury repair. Transl Res 2017; 184:77-100. [PMID: 28284670 PMCID: PMC5429880 DOI: 10.1016/j.trsl.2017.02.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Revised: 12/25/2016] [Accepted: 02/14/2017] [Indexed: 12/22/2022]
Abstract
Vascular precursor cells include stem cells and progenitor cells giving rise to all mature cell types in the wall of blood vessels. When tissue injury occurs, local hypoxia and inflammation result in the generation of vasculogenic mediators which orchestrate migration of vascular precursor cells from their niche environment to the site of tissue injury. The intricate crosstalk among signaling pathways coordinates vascular precursor cell proliferation and differentiation during neovascularization. Establishment of normal blood perfusion plays an essential role in the effective repair of the injured tissue. In recent years, studies on molecular mechanisms underlying the regulation of vascular precursor cell function have achieved substantial progress, which promotes exploration of vascular precursor cell-based approaches to treat chronic wounds and ischemic diseases in vital organ systems. Verification of safety and establishment of specific guidelines for the clinical application of vascular precursor cell-based therapy remain major challenges in the field.
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Affiliation(s)
- Xin Shi
- Department of Integrative Medical Sciences, College of Medicine, Northeast Ohio Medical University, Rootstown, Ohio
| | - Weihong Zhang
- Department of Basic Medicine, School of Nursing, Zhengzhou University, Zhengzhou, Henan Province, PR China
| | - Liya Yin
- Department of Integrative Medical Sciences, College of Medicine, Northeast Ohio Medical University, Rootstown, Ohio
| | - William M Chilian
- Department of Integrative Medical Sciences, College of Medicine, Northeast Ohio Medical University, Rootstown, Ohio
| | - Jessica Krieger
- Department of Integrative Medical Sciences, College of Medicine, Northeast Ohio Medical University, Rootstown, Ohio
| | - Ping Zhang
- Department of Integrative Medical Sciences, College of Medicine, Northeast Ohio Medical University, Rootstown, Ohio.
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20
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Healing potential of zerumbone ointment on experimental full-thickness excision cutaneous wounds in rat. J Tissue Viability 2017; 26:202-207. [PMID: 28454680 DOI: 10.1016/j.jtv.2017.04.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Revised: 03/25/2017] [Accepted: 04/13/2017] [Indexed: 01/22/2023]
Abstract
Zerumbone is a monocyclic sesquiterpene compound. Based on report, it is the predominant bioactive compound from the rhizomes of Zingiber zerumbet. The study was undertaken to evaluate the therapeutic effects of topical zerumbone on excision wounds in rats. A 1% (w/w) simple ointment containing zerumbone was applied topically (100 mg ointment per rat) once a day on full-thickness excision wounds created on rats. The wound tissue was removed and used for estimation of antioxidant activity and to observe histopathological changes. Immunohistochemical staining was performed to study the expression pattern of vascular endothelial growth factor (VEGF), transforming growth factor (TGF)-β1 and collagen IV. Zerumbone exhibited antimicrobial activity against Staphylococcus aureus, Staphylococcus epidermidis, Escherichia coli, Candida albicans and Candida tropicali. Zerumbone ointment has potent wound healing capacity as evident from the wound contraction on 15th post wounding day. The histopathological examinations of healed wound sections showed greater tissue regeneration, more fibroblasts and angiogenesis in zerumbone ointment-treated group. VEGF, TGF-β1 and collagen IV expression were also correlative with the healing pattern observed. Zerumbone possesses potent antioxidant activity by increasing superoxide dismutase, catalase, glutathione and decreased lipid peroxidation. The synergistic effects of both antimicrobial and antioxidant activities in zerumbone are deduced to have accelerated the wound repair. The results demonstrate that zerumbone possessed strong wound healing potential and can be exploited to accelerate excision wound healing.
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21
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Fioretta ES, Dijkman PE, Emmert MY, Hoerstrup SP. The future of heart valve replacement: recent developments and translational challenges for heart valve tissue engineering. J Tissue Eng Regen Med 2017; 12:e323-e335. [PMID: 27696730 DOI: 10.1002/term.2326] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Revised: 07/25/2016] [Accepted: 09/26/2016] [Indexed: 12/18/2022]
Abstract
Heart valve replacement is often the only solution for patients suffering from valvular heart disease. However, currently available valve replacements require either life-long anticoagulation or are associated with valve degeneration and calcification. Moreover, they are suboptimal for young patients, because they do not adapt to the somatic growth. Tissue-engineering has been proposed as a promising approach to fulfil the urgent need for heart valve replacements with regenerative and growth capacity. This review will start with an overview on the currently available valve substitutes and the techniques for heart valve replacement. The main focus will be on the evolution of and different approaches for heart valve tissue engineering, namely the in vitro, in vivo and in situ approaches. More specifically, several heart valve tissue-engineering studies will be discussed with regard to their shortcomings or successes and their possible suitability for novel minimally invasive implantation techniques. As in situ heart valve tissue engineering based on cell-free functionalized starter materials is considered to be a promising approach for clinical translation, this review will also analyse the techniques used to tune the inflammatory response and cell recruitment upon implantation in order to stir a favourable outcome: controlling the blood-material interface, regulating the cytokine release, and influencing cell adhesion and differentiation. In the last section, the authors provide their opinion about the future developments and the challenges towards clinical translation and adaptation of heart valve tissue engineering for valve replacement. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Emanuela S Fioretta
- Institute for Regenerative Medicine (IREM), University of Zurich, Switzerland
| | - Petra E Dijkman
- Institute for Regenerative Medicine (IREM), University of Zurich, Switzerland
| | - Maximilian Y Emmert
- Institute for Regenerative Medicine (IREM), University of Zurich, Switzerland.,Heart Center Zurich, University Hospital Zurich, Switzerland.,Wyss Translational Center Zurich, Switzerland
| | - Simon P Hoerstrup
- Institute for Regenerative Medicine (IREM), University of Zurich, Switzerland.,Wyss Translational Center Zurich, Switzerland.,Department of Biomedical Engineering, Eindhoven University of Technology, The Netherlands
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22
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Emmert MY, Fioretta ES, Hoerstrup SP. Translational Challenges in Cardiovascular Tissue Engineering. J Cardiovasc Transl Res 2017; 10:139-149. [PMID: 28281240 DOI: 10.1007/s12265-017-9728-2] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Accepted: 01/03/2017] [Indexed: 01/23/2023]
Abstract
Valvular heart disease and congenital heart defects represent a major cause of death around the globe. Although current therapy strategies have rapidly evolved over the decades and are nowadays safe, effective, and applicable to many affected patients, the currently used artificial prostheses are still suboptimal. They do not promote regeneration, physiological remodeling, or growth (particularly important aspects for children) as their native counterparts. This results in the continuous degeneration and subsequent failure of these prostheses which is often associated with an increased morbidity and mortality as well as the need for multiple re-interventions. To overcome this problem, the concept of tissue engineering (TE) has been repeatedly suggested as a potential technology to enable native-like cardiovascular replacements with regenerative and growth capacities, suitable for young adults and children. However, despite promising data from pre-clinical and first clinical pilot trials, the translation and clinical relevance of such TE technologies is still very limited. The reasons that currently limit broad clinical adoption are multifaceted and comprise of scientific, clinical, logistical, technical, and regulatory challenges which need to be overcome. The aim of this review is to provide an overview about the translational problems and challenges in current TE approaches. It further suggests directions and potential solutions on how these issues may be efficiently addressed in the future to accelerate clinical translation. In addition, a particular focus is put on the current regulatory guidelines and the associated challenges for these promising TE technologies.
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Affiliation(s)
- Maximilian Y Emmert
- Institute for Regenerative Medicine (IREM), University of Zurich, Moussonstrasse 13, 8091, Zurich, Switzerland.,Heart Center Zurich, University Hospital Zurich, Zurich, Switzerland.,Wyss Translational Center Zurich, Zurich, Switzerland
| | - Emanuela S Fioretta
- Institute for Regenerative Medicine (IREM), University of Zurich, Moussonstrasse 13, 8091, Zurich, Switzerland
| | - Simon P Hoerstrup
- Institute for Regenerative Medicine (IREM), University of Zurich, Moussonstrasse 13, 8091, Zurich, Switzerland. .,Wyss Translational Center Zurich, Zurich, Switzerland.
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23
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Kwon YW, Heo SC, Lee TW, Park GT, Yoon JW, Jang IH, Kim SC, Ko HC, Ryu Y, Kang H, Ha CM, Lee SC, Kim JH. N-Acetylated Proline-Glycine-Proline Accelerates Cutaneous Wound Healing and Neovascularization by Human Endothelial Progenitor Cells. Sci Rep 2017; 7:43057. [PMID: 28230162 PMCID: PMC5322356 DOI: 10.1038/srep43057] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Accepted: 01/17/2017] [Indexed: 12/22/2022] Open
Abstract
Human endothelial progenitor cells (hEPCs) are promising therapeutic resources for wound repair through stimulating neovascularization. However, the hEPCs-based cell therapy has been hampered by poor engraftment of transplanted cells. In this study, we explored the effects of N-acetylated Proline-Glycine-Proline (Ac-PGP), a degradation product of collagen, on hEPC-mediated cutaneous wound healing and neovascularization. Treatment of hEPCs with Ac-PGP increased migration, proliferation, and tube-forming activity of hEPCs in vitro. Knockdown of CXCR2 expression in hEPCs abrogated the stimulatory effects of Ac-PGP on migration and tube formation. In a cutaneous wound healing model of rats and mice, topical application of Ac-PGP accelerated cutaneous wound healing with promotion of neovascularization. The positive effects of Ac-PGP on wound healing and neovascularization were blocked in CXCR2 knockout mice. In nude mice, the individual application of Ac-PGP treatment or hEPC injection accelerated wound healing by increasing neovascularization. Moreover, the combination of Ac-PGP treatment and hEPC injection further stimulated wound healing and neovascularization. Topical administration of Ac-PGP onto wound bed stimulated migration and engraftment of transplanted hEPCs into cutaneous dermal wounds. Therefore, these results suggest novel applications of Ac-PGP in promoting wound healing and augmenting the therapeutic efficacy of hEPCs.
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Affiliation(s)
- Yang Woo Kwon
- Department of Physiology, Pusan National University School of Medicine, Yangsan 50612, Republic of Korea
| | - Soon Chul Heo
- Department of Physiology, Pusan National University School of Medicine, Yangsan 50612, Republic of Korea
| | - Tae Wook Lee
- Department of Physiology, Pusan National University School of Medicine, Yangsan 50612, Republic of Korea
| | - Gyu Tae Park
- Department of Physiology, Pusan National University School of Medicine, Yangsan 50612, Republic of Korea
| | - Jung Won Yoon
- Department of Physiology, Pusan National University School of Medicine, Yangsan 50612, Republic of Korea
| | - Il Ho Jang
- Department of Oral Biochemistry and Molecular Biology, Pusan National University School of Dentistry, Yangsan 50612, Republic of Korea
| | - Seung-Chul Kim
- Department of Obstetrics and Gynecology, Pusan National University School of Medicine, Yangsan 50612, Republic of Korea
| | - Hyun-Chang Ko
- Department of Dermatology, Pusan National University School of Medicine, Yangsan 50612, Republic of Korea
| | - Youngjae Ryu
- Korea Brain Research Institute, Daegu 41068, Republic of Korea
| | - Hyeona Kang
- Korea Brain Research Institute, Daegu 41068, Republic of Korea
| | - Chang Man Ha
- Korea Brain Research Institute, Daegu 41068, Republic of Korea
| | - Sang Chul Lee
- Functional Genomics Research Center, KRIBB, Daejeon 34141, Republic of Korea
| | - Jae Ho Kim
- Department of Physiology, Pusan National University School of Medicine, Yangsan 50612, Republic of Korea.,Research Institute of Convergence Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan 50612, Republic of Korea
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24
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Kasiewicz LN, Whitehead KA. Recent advances in biomaterials for the treatment of diabetic foot ulcers. Biomater Sci 2017; 5:1962-1975. [DOI: 10.1039/c7bm00264e] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Diabetes mellitus is one of the most challenging epidemics facing the world today, with over 300 million patients affected worldwide.
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Affiliation(s)
- Lisa N. Kasiewicz
- Department of Chemical Engineering
- Carnegie Mellon University
- Pittsburgh
- USA
| | - Kathryn A. Whitehead
- Department of Chemical Engineering
- Carnegie Mellon University
- Pittsburgh
- USA
- Department of Biomedical Engineering
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25
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Vedakumari WS, Ayaz N, Karthick AS, Senthil R, Sastry TP. Quercetin impregnated chitosan–fibrin composite scaffolds as potential wound dressing materials — Fabrication, characterization and in vivo analysis. Eur J Pharm Sci 2017; 97:106-112. [DOI: 10.1016/j.ejps.2016.11.012] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 11/09/2016] [Accepted: 11/10/2016] [Indexed: 12/14/2022]
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26
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Zhao WN, Xu SQ, Liang JF, Peng L, Liu HL, Wang Z, Fang Q, Wang M, Yin WQ, Zhang WJ, Lou JN. Endothelial progenitor cells from human fetal aorta cure diabetic foot in a rat model. Metabolism 2016; 65:1755-1767. [PMID: 27832863 DOI: 10.1016/j.metabol.2016.09.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2016] [Revised: 09/03/2016] [Accepted: 09/13/2016] [Indexed: 12/26/2022]
Abstract
OBJECTIVE Recent evidence has suggested that circulating endothelial progenitor cells (EPCs) can repair the arterial endothelium during vascular injury. However, a reliable source of human EPCs is needed for therapeutic applications. In this study, we isolated human fetal aorta (HFA)-derived EPCs and analyzed the capacity of EPCs to differentiate into endothelial cells. In addition, because microvascular dysfunction is considered to be the major cause of diabetic foot (DF), we investigated whether transplantation of HFA-derived EPCs could treat DF in a rat model. METHODS EPCs were isolated from clinically aborted fetal aorta. RT-PCR, fluorescence-activated cell sorting, immunofluorescence, and an enzyme-linked immunosorbent assay were used to examine the expressions of CD133, CD34, CD31, Vascular Endothelial Growth Factor Receptor 2 (VEGFR2), von Willebrand Factor (vWF), and Endothelial Leukocyte Adhesion Molecule-1 (ELAM-1). Morphology and Dil-uptake were used to assess function of the EPCs. We then established a DF model by injecting microcarriers into the hind-limb arteries of Goto-Kakizaki rats and then transplanting the cultured EPCs into the ischemic hind limbs. Thermal infrared imaging, oxygen saturation apparatus, and laser Doppler perfusion imaging were used to monitor the progression of the disease. Immunohistochemistry was performed to examine the microvascular tissue formed by HFA-derived EPCs. RESULTS We found that CD133, CD34, and VEGFR2 were expressed by HFA-derived EPCs. After VEGF induction, CD133 expression was significantly decreased, but expression levels of vWF and ELAM-1 were markedly increased. Furthermore, tube formation and Dil-uptake were improved after VEGF induction. These observations suggest that EPCs could differentiate into endothelial cells. In the DF model, temperature, blood flow, and oxygen saturation were reduced but recovered to a nearly normal level following injection of the EPCs in the hind limb. Ischemic symptoms also improved. Injected EPCs were preferentially and durably engrafted into the blood vessels. In addition, anti-human CD31+-AMA+-vWF+ microvasculars were detected after transplantation of EPCs. CONCLUSION Early fetal aorta-derived EPCs possess strong self-renewal ability and can differentiate into endothelial cells. We demonstrated for the first time that transplanting HFA-derived EPCs could ameliorate DF prognosis in a rat model. These findings suggest that the transplantation of HFA-derived EPCs could serve as an innovative therapeutic strategy for managing DF.
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Affiliation(s)
- Wan-Ni Zhao
- Peking University China-Japan Friendship School of Clinical Medicine, Beijing, China
| | - Shi-Qing Xu
- Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing, China
| | - Jian-Feng Liang
- Department of Neurosurgery, Peking University International Hospital, Beijing, China
| | - Liang Peng
- Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing, China
| | - Hong-Lin Liu
- Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing, China
| | - Zai Wang
- Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing, China
| | - Qing Fang
- Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing, China
| | - Meng Wang
- Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing, China; Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Wei-Qin Yin
- Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing, China; Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Wen-Jian Zhang
- Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing, China.
| | - Jin-Ning Lou
- Peking University China-Japan Friendship School of Clinical Medicine, Beijing, China; Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing, China.
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27
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Malinovskaya NA, Komleva YK, Salmin VV, Morgun AV, Shuvaev AN, Panina YA, Boitsova EB, Salmina AB. Endothelial Progenitor Cells Physiology and Metabolic Plasticity in Brain Angiogenesis and Blood-Brain Barrier Modeling. Front Physiol 2016; 7:599. [PMID: 27990124 PMCID: PMC5130982 DOI: 10.3389/fphys.2016.00599] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Accepted: 11/16/2016] [Indexed: 12/31/2022] Open
Abstract
Currently, there is a considerable interest to the assessment of blood-brain barrier (BBB) development as a part of cerebral angiogenesis developmental program. Embryonic and adult angiogenesis in the brain is governed by the coordinated activity of endothelial progenitor cells, brain microvascular endothelial cells, and non-endothelial cells contributing to the establishment of the BBB (pericytes, astrocytes, neurons). Metabolic and functional plasticity of endothelial progenitor cells controls their timely recruitment, precise homing to the brain microvessels, and efficient support of brain angiogenesis. Deciphering endothelial progenitor cells physiology would provide novel engineering approaches to establish adequate microfluidically-supported BBB models and brain microphysiological systems for translational studies.
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Affiliation(s)
| | | | | | | | | | | | | | - Alla B. Salmina
- Research Institute of Molecular Medicine & Pathobiochemistry, Krasnoyarsk State Medical University named after Prof. V.F. Voino-YasenetskyKrasnoyarsk, Russia
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28
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Cao Z, Tong X, Xia W, Chen L, Zhang X, Yu B, Yang Z, Tao J. CXCR7/p-ERK-Signaling Is a Novel Target for Therapeutic Vasculogenesis in Patients with Coronary Artery Disease. PLoS One 2016; 11:e0161255. [PMID: 27612090 PMCID: PMC5017667 DOI: 10.1371/journal.pone.0161255] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Accepted: 08/02/2016] [Indexed: 12/15/2022] Open
Abstract
Coronary artery disease (CAD) is characterized by insufficient vasculogenic response to ischemia, which is typically accompanied by dysfunction of endothelial outgrowth cells (EOCs). CXC chemokine receptor 7 (CXCR7) is a key modulator of the neovascularization of EOCs to perfusion defect area. However, the mechanism underlying the role of EOCs in CAD-related abnormal vasculogenesis is still not clear. Here, we investigated the alteration of EOCs-related vasculogenic capacity in patients with CAD and its potential mechanism. Compared with EOCs isolated from healthy subjects, EOCs from CAD patients showed an impaired vasculogenic function in vitro. CXCR7 expression of EOCs from CAD patients was downregulated. Meanwhile, the phosphorylation of extracellular signal-regulated kinase (ERK), downstream of CXCR7 signaling, was also reduced. CXCR7 expression introduced by adenovirus increased the phosphorylation of ERK, which was parallel to improved function of EOCs. The enhanced adhesion and vasculogenesis of EOCs can be blocked by short interfering RNA (siRNA) against CXCR7 and ERK inhibitor PD098059. Therefore, our study demonstrates that the upregulation of CXCR7 signaling contributes to increased vasculogenic capacity of EOCs from CAD patients, indicating that CXCR7 signaling may be a novel therapeutic vasculogenic target for CAD.
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Affiliation(s)
- Zheng Cao
- Department of Cardiology, Taihe Hospital, Hubei University of Medicine, Hubei, China
| | - Xinzhu Tong
- Department of Cardiology, Taihe Hospital, Hubei University of Medicine, Hubei, China
- Department of Hypertension and Vascular Disease, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Wenhao Xia
- Department of Hypertension and Vascular Disease, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Long Chen
- Department of Hypertension and Vascular Disease, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Xiaoyu Zhang
- Department of Hypertension and Vascular Disease, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Bingbo Yu
- Department of Hypertension and Vascular Disease, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Zhen Yang
- Department of Hypertension and Vascular Disease, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
- * E-mail: (JT); (ZY)
| | - Jun Tao
- Department of Hypertension and Vascular Disease, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
- * E-mail: (JT); (ZY)
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Parani M, Lokhande G, Singh A, Gaharwar AK. Engineered Nanomaterials for Infection Control and Healing Acute and Chronic Wounds. ACS APPLIED MATERIALS & INTERFACES 2016; 8:10049-69. [PMID: 27043006 DOI: 10.1021/acsami.6b00291] [Citation(s) in RCA: 145] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Nanoengineered biomaterials have dramatically expanded the range of tools used for infection control and to accelerate wound healing. This review thoroughly describes the developments that are shaping this emerging field and evaluates the potential wound healing applications of recently developed engineered nanomaterials for both acute and chronic wounds. Specifically, we will assess the unique characteristics of engineered nanomaterials that render them applicable for wound healing and infection control. A range of engineered nanomaterials, including polymeric-, metallic- and ceramic-based nanomaterials, that could be used as therapeutic delivery agents to accelerate regeneration of damaged dermal and epidermal tissues are also detailed. Finally, we will detail the current state of engineered nanomaterials for wound regeneration and will identify promising new research directions in infection control.
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Affiliation(s)
- Madasamy Parani
- Genomics Laboratory, Department of Genetic Engineering, SRM University , Chennai, Tamil Nadu 603 203, India
| | | | - Ankur Singh
- Sibley School of Mechanical and Aerospace Engineering, Cornell University , Ithaca, New York 14853, United States
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30
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Low-intensity treadmill exercise promotes rat dorsal wound healing. ACTA ACUST UNITED AC 2016; 36:121-126. [PMID: 26838752 DOI: 10.1007/s11596-016-1553-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Revised: 01/07/2016] [Indexed: 12/17/2022]
Abstract
In order to investigate the promoting effect of low-intensity treadmill exercise on rat dorsal wound healing and the mechanism, 20 Sprague-Dawley rats were randomly divided into two groups: exercise group (Ex) and non-exercise group (non-ex). The rats in Ex group were given treadmill exercise for one month, and those in non-ex group raised on the same conditions without treadmill exercise. Both groups received dorsal wound operation with free access to food and water. By two-week continuous observation and recording of the wound area, the healing rate was analyzed. The blood sample was collected at day 14 post-operation via cardiac puncture for determination of the number of endothelial progenitor cells (EPCs) by flow cytometry, and the concentrations of relevant cytokines such as basic fibroblast growth factor (bFGF), endothelial nitric oxide synthase (eNOS) and vascular endothelial growth factor (VEGF) were measured by ELISA. The skin tissue around the wound was dissected to observe the vascular density under the microscope after HE staining, to detect the mRNA level of VEGFR2 and angiopoietin-1 (Ang-1) receptor using RT-qPCR, and protein expression of a-smooth muscle actin (αSMA) and type III collagen (ColIII) using Western blotting. It was found that the wound area in Ex group was smaller at the same time point than in non-ex group. The number of circulating EPCs was greater and the concentrations of vasoactive factors such as VEGF, eNOS and bFGF were higher in Ex group than in non-ex group. HE staining displayed a higher vessel density in Ex group than in non-ex group. Moreover, the mRNA expression of VEGFR2 and Ang-1 detected in the wound tissue in Ex group was higher than in non-ex group. Meanwhile, the protein expression of αSMA and ColIII was more abundant in Ex group than in non-ex group. Conclusively, the above results demonstrate Ex rats had a higher wound healing rate, suggesting low-intensity treadmill exercise accelerates wound healing. The present work may provide some hint for future study of treating refractory wound.
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31
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Konings J, Hoving LR, Ariëns RS, Hethershaw EL, Ninivaggi M, Hardy LJ, de Laat B, ten Cate H, Philippou H, Govers-Riemslag JW. The role of activated coagulation factor XII in overall clot stability and fibrinolysis. Thromb Res 2015; 136:474-80. [DOI: 10.1016/j.thromres.2015.06.028] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2015] [Revised: 06/14/2015] [Accepted: 06/18/2015] [Indexed: 11/26/2022]
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Geiger BC, Nelson MT, Munj HR, Tomasko DL, Lannutti JJ. Dual drug release from CO2-infused nanofibers via hydrophobic and hydrophilic interactions. J Appl Polym Sci 2015. [DOI: 10.1002/app.42571] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Brett C. Geiger
- Department of Biomedical Engineering; The Ohio State University; Columbus Ohio 43210
| | - Mark Tyler Nelson
- Department of Biomedical Engineering; The Ohio State University; Columbus Ohio 43210
| | - Hrishikesh R. Munj
- William G. Lowrie Department of Chemical and Biomolecular Engineering; The Ohio State University; Columbus Ohio 43210
| | - David L. Tomasko
- William G. Lowrie Department of Chemical and Biomolecular Engineering; The Ohio State University; Columbus Ohio 43210
| | - John J. Lannutti
- Department of Materials Science and Engineering; The Ohio State University; Columbus Ohio 43210
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Maeng YS, Choi YJ, Kim EK. TGFBIp regulates differentiation of EPC (CD133+
c-kit+
lin−
cells) to EC through activation of the notch signaling pathway. Stem Cells 2015; 33:2052-62. [DOI: 10.1002/stem.2003] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Accepted: 02/06/2015] [Indexed: 01/16/2023]
Affiliation(s)
- Yong-Sun Maeng
- Department of Ophthalmology; Corneal Dystrophy Research Institute; Seoul South Korea
| | - Yeon Jeong Choi
- Department of Ophthalmology; Corneal Dystrophy Research Institute; Seoul South Korea
| | - Eung Kweon Kim
- Department of Ophthalmology; Corneal Dystrophy Research Institute; Seoul South Korea
- Brain Korea 21 Plus Project for Medical Science; Institute of Vision Research, Severance Biomedical Science Institute, Yonsei University College of Medicine; Seoul South Korea
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Park HJ, Lee SJ, Kim MM. Effect of α-asarone on angiogenesis and matrix metalloproteinase. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2015; 39:1107-1114. [PMID: 25912851 DOI: 10.1016/j.etap.2015.04.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2014] [Revised: 03/31/2015] [Accepted: 04/04/2015] [Indexed: 06/04/2023]
Abstract
α-Asarone is a main component of Acorus gramineus widely known as an oriental traditional medicinal stuff. A. gramineus has been known to have a variety of medicinal efficacies such as anti-gastric ulcer and anti-allergic activities, inhibition of histamine release and antioxidant effect. However, its effect on angiogenesis remains unclear. The aim of this study was to investigate the effect of α-asarone on induction of angiogenesis through modulation of matrix metalloproteinase (MMP). First of all, MTT assay was performed to evaluate the effect of α-asarone on cell viability using MTT assay, and then tube formation assay with human umbilical vein endothelial cells (HUVEC) in vitro and rat aorta ring assay ex vivo were carried out to elucidate its effect on angiogenesis. Treatment with α-asarone below 6μM showed no cytotoxicity in human fibrosarcoma cells (HT1080) and HUVEC. It was observed that α-asarone not only promotes tube formation of HUVEC but also induces angiogenesis of rat aorta. In addition, the effects of α-asarone on the expressions of protein and gene were evaluated using western blot analysis and RT-PCR assay. α-Asarone increased the expression levels of MMP-2 and MMP-9 stimulated by phenazine methosulfate (PMS) and phorbol 12-myristate 13-acetate (PMA) in HT1080. Especially, the expression level of antioxidant enzyme such as glutathione reductase was increased in the presence of α-asarone. Therefore, above findings suggest that α-asarone may play an important role in pathological diseases related to MMP and angiogenesis.
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Affiliation(s)
- Hye-Jung Park
- Department of Chemistry, Dong-Eui University, Busan 614-714, Republic of Korea
| | - Soo-Jin Lee
- Department of Chemistry, Dong-Eui University, Busan 614-714, Republic of Korea
| | - Moon-Moo Kim
- Department of Chemistry, Dong-Eui University, Busan 614-714, Republic of Korea.
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35
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Sireesha M, Jagadeesh Babu V, Ramakrishna S. Biocompatible and biodegradable elastomer/fibrinogen composite electrospun scaffolds for cardiac tissue regeneration. RSC Adv 2015. [DOI: 10.1039/c5ra20322h] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Schematic for nanofiber with HCMs in cardiac tissue engineering.
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Affiliation(s)
- Merum Sireesha
- Center for Nanofibers and Nanotechnology
- Nanoscience and Nanotechnology Initiative
- Faculty of Engineering
- National University of Singapore
- Singapore
| | - Veluru Jagadeesh Babu
- Department of Chemical and Biomolecular Engineering
- National University of Singapore
- Singapore 117 585
- Singapore
| | - Seeram Ramakrishna
- Center for Nanofibers and Nanotechnology
- Nanoscience and Nanotechnology Initiative
- Faculty of Engineering
- National University of Singapore
- Singapore
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36
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Fibrin as a delivery system in wound healing tissue engineering applications. J Control Release 2014; 196:1-8. [PMID: 25284479 DOI: 10.1016/j.jconrel.2014.09.023] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Revised: 09/22/2014] [Accepted: 09/23/2014] [Indexed: 12/21/2022]
Abstract
Fibrin is formed in the body upon initiation of the clotting cascade and is produced commercially for use as a tissue sealant and hemostasis device during surgical procedures. Experimentally fibrin is being increasingly used as a vector to deliver growth factors, cells, drugs and genes in tissue engineering applications mimicking aspects of the extra cellular matrix. Growth factors (GFs) are central to wound healing, inducing cell proliferation, migration and differentiation. Attempts have been made to augment wound healing with GFs, however widespread clinical use has been hindered in vivo due to their rapid metabolism within the body. Fibrin hydrogels protect GFs from rapid degradation and the composition of which can be altered to achieve their optimal release. This article reviews the use of fibrin for the delivery of GFs and details the various strategies that have evolved to alter the release rate so as to enhance the regenerative process, including bi-domain peptides, plasmin degradation sequences and heparin incorporation. This paper also reviews other recent advances in this field, such as dual delivery of cells and GF or sequential release of multiple GF.
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37
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Riopel M, Trinder M, Wang R. Fibrin, a scaffold material for islet transplantation and pancreatic endocrine tissue engineering. TISSUE ENGINEERING PART B-REVIEWS 2014; 21:34-44. [PMID: 24947304 DOI: 10.1089/ten.teb.2014.0188] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Fibrin is derived from fibrinogen during injury to produce a blood clot and thus promote wound repair. Composed of different domains, including Arg-Gly-Asp amino acid motifs, fibrin is used extensively as a hydrogel and sealant in the clinic. By binding to cell surface receptors like integrins and acting as a supportive 3D scaffold, fibrin has been useful in promoting cell differentiation, proliferation, function, and survival. In particular, fibrin has been able to maintain islet cell architecture, promote beta cell insulin secretion, and islet angiogenesis, as well as inducing a protective effect against cell death. During islet transplantation, fibrin improved neovascularization and islet function. These improvements resulted in reduced number of transplanted islets necessary to reverse diabetes. Therefore, fibrin, as a biocompatible and biodegradable scaffold, should be considered during subcutaneous islet transplantation and beta cell expansion in vitro to ensure maintenance of islet cell function, proliferation, and survival to develop effective cell-based therapies for the treatment of diabetes.
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Affiliation(s)
- Matthew Riopel
- 1 Children's Health Research Institute, London, Ontario, Canada
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38
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The role of integrin α2 in cell and matrix therapy that improves perfusion, viability and function of infarcted myocardium. Biomaterials 2014; 35:4749-58. [PMID: 24631247 DOI: 10.1016/j.biomaterials.2014.02.028] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2014] [Accepted: 02/16/2014] [Indexed: 12/13/2022]
Abstract
Injectable delivery matrices hold promise in enhancing engraftment and the overall efficacy of cardiac cell therapies; however, the mechanisms responsible remain largely unknown. Here we studied the interaction of a collagen matrix with circulating angiogenic cells (CACs) in a mouse myocardial infarction model. CACs + matrix treatment enhanced CAC engraftment, and improved myocardial perfusion, viability and function compared to cells or matrix alone. Integrin-linked kinase (ILK) was up-regulated in matrix-cultured CACs. Integrin α2β1 blocking prevented ILK up-regulation, significantly reduced the adhesion, proliferation, and paracrine properties of matrix-cultured CACs, and negated the benefits of CACs + matrix therapy in vivo. Furthermore, integrin α5 was essential for the angiogenic potential of CACs on matrix. These findings indicate that the synergistic therapeutic effect of CACs + matrix therapy in MI requires the matrix to enhance CAC function via α2β1 and α5 integrin signaling mechanisms, rather than simply delivering the cells.
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39
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Ninan N, Muthiah M, Park IK, Elain A, Wong TW, Thomas S, Grohens Y. Faujasites incorporated tissue engineering scaffolds for wound healing: in vitro and in vivo analysis. ACS APPLIED MATERIALS & INTERFACES 2013; 5:11194-206. [PMID: 24102066 DOI: 10.1021/am403436y] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Exploring the possibility of using inorganic faujasites in tissue engineering scaffolds is a prospective approach in regenerative medicine. Novel gelatin/hyaluronic acid (HA)/faujasite porous scaffolds with low surface energy were fabricated by lyophilization. The pore size of gelatin/HA scaffold was 50-2000 μm, whereas it was greatly reduced to 10-250 μm after incorporation of 2.4% (w/w) of faujasites in polymer matrix, GH(2.4%). Micro computed tomography analysis showed that the porosity of GH(2.4%) was 90.6%. The summative effect was ideal for growth of dermal fibroblasts and cellular attachment. XRD analysis revealed that the embedded faujasites maintained their crystallinity in the polymer matrix even though they interacted with the polymers as indicated by FT-IR analysis. Coupling with effective reinforcement of faujasites, GH(2.4%) demonstrated compression modulus of 929 ± 7 Pa and glass transition temperature of 31 ± 0.05 °C. It exhibited controlled swelling and degradation, allowing sufficient space for tissue regrowth. The latter is further supported by capability of faujasites to provide efficient oxygen supply to fibroblast cells. GH(2.4%) showed a cell viability of 91 ± 8% on NIH 3T3 fibroblast cell lines. The in vivo studies on Sprague-Dawley rats revealed its ability to enhance wound healing by accelerating re-epithelization and collagen deposition. These findings indicated its potential as excellent wound dressing material.
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Affiliation(s)
- Neethu Ninan
- Laboratoire Ingénierie des Matériaux de Bretagne, Université de Bretagne Sud , BP 92116, 56321 Lorient Cedex, France
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40
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Kanitkar M, Jaiswal A, Deshpande R, Bellare J, Kale VP. Enhanced growth of endothelial precursor cells on PCG-matrix facilitates accelerated, fibrosis-free, wound healing: a diabetic mouse model. PLoS One 2013; 8:e69960. [PMID: 23922871 PMCID: PMC3724903 DOI: 10.1371/journal.pone.0069960] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2013] [Accepted: 06/13/2013] [Indexed: 11/19/2022] Open
Abstract
Diabetes mellitus (DM)-induced endothelial progenitor cell (EPC) dysfunction causes impaired wound healing, which can be rescued by delivery of large numbers of 'normal' EPCs onto such wounds. The principal challenges herein are (a) the high number of EPCs required and (b) their sustained delivery onto the wounds. Most of the currently available scaffolds either serve as passive devices for cellular delivery or allow adherence and proliferation, but not both. This clearly indicates that matrices possessing both attributes are 'the need of the day' for efficient healing of diabetic wounds. Therefore, we developed a system that not only allows selective enrichment and expansion of EPCs, but also efficiently delivers them onto the wounds. Murine bone marrow-derived mononuclear cells (MNCs) were seeded onto a PolyCaprolactone-Gelatin (PCG) nano-fiber matrix that offers a combined advantage of strength, biocompatibility wettability; and cultured them in EGM2 to allow EPC growth. The efficacy of the PCG matrix in supporting the EPC growth and delivery was assessed by various in vitro parameters. Its efficacy in diabetic wound healing was assessed by a topical application of the PCG-EPCs onto diabetic wounds. The PCG matrix promoted a high-level attachment of EPCs and enhanced their growth, colony formation, and proliferation without compromising their viability as compared to Poly L-lactic acid (PLLA) and Vitronectin (VN), the matrix and non-matrix controls respectively. The PCG-matrix also allowed a sustained chemotactic migration of EPCs in vitro. The matrix-effected sustained delivery of EPCs onto the diabetic wounds resulted in an enhanced fibrosis-free wound healing as compared to the controls. Our data, thus, highlight the novel therapeutic potential of PCG-EPCs as a combined 'growth and delivery system' to achieve an accelerated fibrosis-free healing of dermal lesions, including diabetic wounds.
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Affiliation(s)
- Meghana Kanitkar
- National Centre for Cell Science, NCCS Complex, University of Pune Campus, Ganeshkhind, Pune, Maharashtra, India
| | - Amit Jaiswal
- Department of Chemical Engineering, Indian Institute of Technology-Bombay, Powai, Mumbai, Maharashtra, India
| | - Rucha Deshpande
- National Centre for Cell Science, NCCS Complex, University of Pune Campus, Ganeshkhind, Pune, Maharashtra, India
| | - Jayesh Bellare
- Department of Chemical Engineering, Indian Institute of Technology-Bombay, Powai, Mumbai, Maharashtra, India
| | - Vaijayanti P. Kale
- National Centre for Cell Science, NCCS Complex, University of Pune Campus, Ganeshkhind, Pune, Maharashtra, India
- * E-mail:
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41
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Filová E, Brynda E, Riedel T, Chlupáč J, Vandrovcová M, Svindrych Z, Lisá V, Houska M, Pirk J, Bačáková L. Improved adhesion and differentiation of endothelial cells on surface-attached fibrin structures containing extracellular matrix proteins. J Biomed Mater Res A 2013; 102:698-712. [PMID: 23723042 DOI: 10.1002/jbm.a.34733] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2012] [Revised: 01/07/2013] [Accepted: 01/09/2013] [Indexed: 02/04/2023]
Abstract
Currently used vascular prostheses are hydrophobic and do not allow endothelial cell (EC) adhesion and growth. The aim of this study was to prepare fibrin (Fb)-based two-dimensional (2D) and three-dimensional (3D) assemblies coated with extracellular matrix (ECM) proteins and to evaluate the EC adhesion, proliferation and differentiation on these assemblies in vitro. Coating of Fb with collagen, laminin (LM), and fibronectin (FN) was proved using the surface plasmon resonance technique. On all Fb assemblies, ECs reached higher cell densities than on polystyrene after 3 and 7 days of culture. Immunoflurescence staining showed better assembly of talin and vinculin into focal adhesion plaques, and also more apparent staining of vascular endothelial cadherin on surface-attached 3D Fb and protein-coated Fb assemblies. On these samples, ECs also contained a lower concentration of intercellular adhesion molecule-1, measured by enzyme-linked immunosorbent assay. Higher concentrations of CD31 (platelet-endothelial cell adhesion molecule-1) were found on 3D Fb coated with LM, and higher concentrations of von Willebrand factor were found on 3D Fb coated with type I collagen or LM in comparison to 2D Fb layers. The results indicate that ECM protein-coated 2D and 3D Fb assemblies can be used for versatile applications in various tissue replacements where endothelialization is desirable, for example, vascular prostheses and heart valves.
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Affiliation(s)
- Elena Filová
- Department of Biomaterials and Tissue Engineering, Institute of Physiology, Academy of Sciences of the Czech Republic, v.v.i., 142 20 Prague 4, Czech Republic
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42
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Balasubramanian P, Prabhakaran MP, Kai D, Ramakrishna S. Human cardiomyocyte interaction with electrospun fibrinogen/gelatin nanofibers for myocardial regeneration. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2013; 24:1660-75. [DOI: 10.1080/09205063.2013.789958] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Preethi Balasubramanian
- a Department of Mechanical Engineering , National University of Singapore, 9 Engineering Drive 1 , Singapore , 117576 , Singapore
| | - Molamma P. Prabhakaran
- b Faculty of Engineering , Center for Nanofibers and Nanotechnology, Nanoscience and Nanotechnology Initiative, National University of Singapore, 2 Engineering Drive 3 , Singapore , 117576 , Singapore
| | - Dan Kai
- c NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore , Singapore , 117576 , Singapore
| | - Seeram Ramakrishna
- a Department of Mechanical Engineering , National University of Singapore, 9 Engineering Drive 1 , Singapore , 117576 , Singapore
- b Faculty of Engineering , Center for Nanofibers and Nanotechnology, Nanoscience and Nanotechnology Initiative, National University of Singapore, 2 Engineering Drive 3 , Singapore , 117576 , Singapore
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43
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A comparison of human cord blood- and embryonic stem cell-derived endothelial progenitor cells in the treatment of chronic wounds. Biomaterials 2012; 34:995-1003. [PMID: 23127335 DOI: 10.1016/j.biomaterials.2012.10.039] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2012] [Accepted: 10/12/2012] [Indexed: 12/21/2022]
Abstract
Endothelial progenitor cells (EPCs) promote new blood vessel formation and increase angiogenesis by secreting growth factors and cytokines in ischemic tissues. Therefore, EPCs have been highlighted as an alternative cell source for wound healing. EPCs can be isolated from various sources, including the bone marrow, cord blood, and adipose tissue. However, several recent studies have reported that isolating EPCs from these sources has limitations, such as the isolation of insufficient cell numbers and the difficulty of expanding these cells in culture. Thus, human embryonic stem cells (hESCs) have generated great interest as an alternative source of EPCs. Previously, we established an efficient preparation method to obtain EPCs from hESCs (hESC-EPCs). These hESC-EPCs secreted growth factors and cytokines, which are known to be important in angiogenesis and wound healing. In this study, we directly compared the capacity of hESC-EPCs and human cord blood-derived EPCs (hCB-EPCs) to benefit wound healing. The number of hESC-EPCs increased during culture and was always higher than the number of hCB-EPCs during the culture period. In addition, the levels of VEGF and Ang-1 secreted by hESC-EPCs were significantly higher than those produced by hCB-EPCs. After transplantation in a mouse dermal excisional wound model, all EPC-transplanted wounds exhibited better regeneration than in the control group. More importantly, we found that the wounds transplanted with hESC-EPCs showed significantly accelerated re-epithelialization. Thus, hESC-EPCs may be a promising cell source for the treatment of chronic wounds.
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44
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The use of regenerative medicine in the management of invasive bladder cancer. Adv Urol 2012; 2012:653652. [PMID: 23019421 PMCID: PMC3457671 DOI: 10.1155/2012/653652] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2012] [Accepted: 08/01/2012] [Indexed: 02/01/2023] Open
Abstract
Muscle invasive and recurrent nonmuscle invasive bladder cancers have been traditionally treated with a radical cystectomy and urinary diversion. The urinary diversion is generally accomplished through the creation of an incontinent ileal conduit, continent catheterizable reservoir, or orthotopic neobladder utilizing small or large intestine. While radical extirpation of the bladder is often successful from an oncological perspective, there is a significant morbidity associated with enteric interposition within the genitourinary tract. Therefore, there is a great opportunity to decrease the morbidity of the surgical management of bladder cancer through utilization of novel technologies for creating a urinary diversion without the use of intestine. Clinical trials using neourinary conduits (NUC) seeded with autologous smooth muscle cells are currently in progress and may represent a significant surgical advance, potentially eliminating the complications associated with the use of gastrointestinal segments in the urinary reconstruction, simplifying the surgical procedure, and greatly facilitating recovery from cystectomy.
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45
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Lee YB, Shin YM, Lee JH, Jun I, Kang JK, Park JC, Shin H. Polydopamine-mediated immobilization of multiple bioactive molecules for the development of functional vascular graft materials. Biomaterials 2012; 33:8343-52. [PMID: 22917738 DOI: 10.1016/j.biomaterials.2012.08.011] [Citation(s) in RCA: 126] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2012] [Accepted: 08/05/2012] [Indexed: 10/28/2022]
Abstract
In this study, we introduced a simple method for polydopamine-mediated immobilization of dual bioactive factors for the preparation of functionalized vascular graft materials. Polydopamine was deposited on elastic and biodegradable poly(lactic acid-co-ɛ-caprolactone) (PLCL) films, and a cell adhesive RGD-containing peptide and basic fibroblast growth factor were subsequently immobilized by simple dipping. We used an enzyme-linked immunosorbent assay and fluorescamine assay to confirm that we had stably immobilized bioactive molecules on the polydopamine-coated PLCL film in a reaction time-dependent manner. When human umbilical vein endothelial cells (HUVEC) were cultured on the prepared substrates, the number of adherent cells and proliferation of HUVEC for up to 14 days were greatest on the film immobilized with dual factors. On the other hand, the film immobilized with RGD peptide exhibited the highest migration speed compared to the other groups. The expression of cluster of differentiation 31 and von Willebrand factor, which indicates maturation of endothelial cells, was highly stimulated in the dual factor-immobilized group, and passively adsorbed factors showed a negligible effect. The immobilization of bioactive molecules inspired by polydopamine was successful, and adhesion, migration, proliferation and differentiation of HUVEC were synergistically accelerated by the presence of multiple signaling factors. Collectively, our results have demonstrated that a simple coating with polydopamine enables the immobilization of multiple bioactive molecules for preparation of polymeric functionalized vascular graft materials.
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Affiliation(s)
- Yu Bin Lee
- Department of Bioengineering, College of Engineering, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, Republic of Korea
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Ganeshkumar M, Ponrasu T, Krithika R, Iyappan K, Gayathri VS, Suguna L. Topical application of Acalypha indica accelerates rat cutaneous wound healing by up-regulating the expression of Type I and III collagen. JOURNAL OF ETHNOPHARMACOLOGY 2012; 142:14-22. [PMID: 22521732 DOI: 10.1016/j.jep.2012.04.005] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2011] [Revised: 03/14/2012] [Accepted: 04/06/2012] [Indexed: 05/31/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Acalypha indica Linn. (Acalypha indica) vernacularly called Kuppaimeni in Tamil, has been used as a folklore medicine since ages for the treatment of wounds by tribal people of Tamil Nadu, Southern India. The present study investigates the biochemical and molecular rationale behind the healing potential of Acalypha indica on dermal wounds in rats. MATERIAL AND METHODS Acalypha indica extract (40 mg/kg body weight) was applied topically once a day on full-thickness excision wounds created on rats. The wound tissue was removed and used for estimation of various biochemical and biophysical analyses and to observe histopathological changes with and with-out extract treatment. The serum levels of pro-inflammatory cytokine tumor necrosis factor (TNF-α) was measured at 12 h, 24 h, 48 h and 72 h post-wounding using ELISA. Reverse transcription-polymerase chain reaction (RT-PCR) analysis was performed to study the expression pattern of transforming growth factor [TGF-β1], collagen 1 α (I) [Col 1 α (I)] and collagen 3 α (I) [Col 3 α (I)]. Likewise, linear incision wounds were created and treated with the extract and used for tensile strength measurements. RESULTS Wound healing in control rats was characterized by less inflammatory cell infiltration, lack of granulation tissue formation, deficit of collagen and significant decrease in biomechanical strength of wounds. Acalypha indica treatment mitigated the oxidative stress and decreased lipid peroxidation with concomitant increase in ascorbic acid levels. It also improved cellular proliferation, increased TNF-α levels during early stages of wound healing, up-regulated TGF-β1 and elevated collagen synthesis by markedly increasing the expression of Col 1 α (I) and Col 3 α (I). Increased rates of wound contraction, epithelialization, enhanced shrinkage temperature and high tensile strength were observed in the extract treated rats. CONCLUSION Acalypha indica extract was shown to augment the process of dermal wound healing by its ability to increase collagen synthesis through up-regulation of key players in different phases of wound healing and by its antioxidative potential.
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Affiliation(s)
- Moorthy Ganeshkumar
- Department of Biochemistry, Central Leather Research Institute-Council of Scientific and Industrial Research, Chennai 600020, India
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Mittal A, Kumar R, Parsad D, Kumar N. Cytomodulin-functionalized porous PLGA particulate scaffolds respond better to cell migration, actin production and wound healing in rodent model. J Tissue Eng Regen Med 2012; 8:351-63. [DOI: 10.1002/term.1527] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2011] [Revised: 02/06/2012] [Accepted: 04/03/2012] [Indexed: 11/06/2022]
Affiliation(s)
- Anupama Mittal
- Department of Pharmaceutics; National Institute of Pharmaceutical Education and Research (NIPER); Sector 67 SAS Nagar-160 062 India
| | - Ravinder Kumar
- Department of Dermatology; Post Graduate Institute of Medical Education and Research (PGIMER); Chandigarh-160012 India
| | - Davinder Parsad
- Department of Dermatology; Post Graduate Institute of Medical Education and Research (PGIMER); Chandigarh-160012 India
| | - Neeraj Kumar
- Department of Pharmaceutics; National Institute of Pharmaceutical Education and Research (NIPER); Sector 67 SAS Nagar-160 062 India
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Musilli C, Karam JP, Paccosi S, Muscari C, Mugelli A, Montero-Menei CN, Parenti A. Pharmacologically active microcarriers for endothelial progenitor cell support and survival. Eur J Pharm Biopharm 2012; 81:609-16. [PMID: 22561954 DOI: 10.1016/j.ejpb.2012.04.014] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2011] [Revised: 04/13/2012] [Accepted: 04/18/2012] [Indexed: 12/29/2022]
Abstract
The regenerative potential of endothelial progenitor cell (EPC)-based therapies is limited due to poor cell viability and minimal retention following application. Neovascularization can be improved by means of scaffolds supporting EPCs. The aim of the present study was to investigate whether human early EPCs (eEPCs) could be efficiently cultured on pharmacologically active microcarriers (PAMs), made with poly(d,l-lactic-coglycolic acid) and coated with adhesion/extracellular matrix molecules. They may serve as a support for stem cells and may be used as cell carriers providing a controlled delivery of active protein such as the angiogenic factor, vascular endothelial growth factor-A (VEGF-A). eEPC adhesion to fibronectin-coated PAMs (FN-PAMs) was assessed by means of microscopic evaluation and by means of Alamar blue assay. Phospho ERK(1/2) and PARP-1 expression was measured by means of Western blot to assess the survival effects of FN-PAMs releasing VEGF-A (FN-VEGF-PAMs). The Alamar blue assay or a modified Boyden chamber assay was employed to assess proliferative or migratory capacity, respectively. Our data indicate that eEPCs were able to adhere to empty FN-PAMs within a few hours. FN-VEGF-PAMs increased the ability of eEPCs to adhere to them and strongly supported endothelial-like phenotype and cell survival. Moreover, the release of VEGF-A by FN-PAMs stimulated in vitro HUVEC migration and proliferation. These data strongly support the use of PAMs for supporting eEPC growth and survival and for stimulating resident mature human endothelial cells.
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Affiliation(s)
- Claudia Musilli
- Department of Preclinical and Clinical Pharmacology, University of Florence, Florence, Italy
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Caiado F, Dias S. Endothelial progenitor cells and integrins: adhesive needs. FIBROGENESIS & TISSUE REPAIR 2012; 5:4. [PMID: 22410175 PMCID: PMC3323425 DOI: 10.1186/1755-1536-5-4] [Citation(s) in RCA: 99] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2011] [Accepted: 03/12/2012] [Indexed: 02/07/2023]
Abstract
In the last decade there have been multiple studies concerning the contribution of endothelial progenitor cells (EPCs) to new vessel formation in different physiological and pathological settings. The process by which EPCs contribute to new vessel formation in adults is termed postnatal vasculogenesis and occurs via four inter-related steps. They must respond to chemoattractant signals and mobilize from the bone marrow to the peripheral blood; home in on sites of new vessel formation; invade and migrate at the same sites; and differentiate into mature endothelial cells (ECs) and/or regulate pre-existing ECs via paracrine or juxtacrine signals. During these four steps, EPCs interact with different physiological compartments, namely bone marrow, peripheral blood, blood vessels and homing tissues. The success of each step depends on the ability of EPCs to interact, adapt and respond to multiple molecular cues. The present review summarizes the interactions between integrins expressed by EPCs and their ligands: extracellular matrix components and cell surface proteins present at sites of postnatal vasculogenesis. The data summarized here indicate that integrins represent a major molecular determinant of EPC function, with different integrin subunits regulating different steps of EPC biology. Specifically, integrin α4β1 is a key regulator of EPC retention and/or mobilization from the bone marrow, while integrins α5β1, α6β1, αvβ3 and αvβ5 are major determinants of EPC homing, invasion, differentiation and paracrine factor production. β2 integrins are the major regulators of EPC transendothelial migration. The relevance of integrins in EPC biology is also demonstrated by many studies that use extracellular matrix-based scaffolds as a clinical tool to improve the vasculogenic functions of EPCs. We propose that targeted and tissue-specific manipulation of EPC integrin-mediated interactions may be crucial to further improve the usage of this cell population as a relevant clinical agent.
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Affiliation(s)
- Francisco Caiado
- Angiogenesis Laboratory, CIPM, Instituto Português de Oncologia Francisco Gentil, EPE, Lisboa, Portugal.
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Fioretta ES, Fledderus JO, Burakowska-Meise EA, Baaijens FPT, Verhaar MC, Bouten CVC. Polymer-based Scaffold Designs For In Situ Vascular Tissue Engineering: Controlling Recruitment and Differentiation Behavior of Endothelial Colony Forming Cells. Macromol Biosci 2012; 12:577-90. [DOI: 10.1002/mabi.201100315] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2011] [Revised: 10/08/2011] [Indexed: 01/22/2023]
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