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Abstract
Enzymes are a class of protein that catalyze a wide range of chemical reactions, including the cleavage of specific peptide bonds. They are expressed in all cell types, play vital roles in tissue development and homeostasis, and in many diseases, such as cancer. Enzymatic activity is tightly controlled through the use of inactive pro-enzymes, endogenous inhibitors and spatial localization. Since the presence of specific enzymes is often correlated with biological processes, and these proteins can directly modify biomolecules, they are an ideal biological input for cell-responsive biomaterials. These materials include both natural and synthetic polymers, cross-linked hydrogels and self-assembled peptide nanostructures. Within these systems enzymatic activity has been used to induce biodegradation, release therapeutic agents and for disease diagnosis. As technological advancements increase our ability to quantify the expression and nanoscale organization of proteins in cells and tissues, as well as the synthesis of increasingly complex and well-defined biomaterials, enzyme-responsive biomaterials are poised to play vital roles in the future of biomedicine.
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Affiliation(s)
- E. Thomas Pashuck
- Department of Bioengineering, P.C. Rossin College of Engineering and Applied Science, Lehigh University Bethlehem Pennsylvania USA
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2
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Jaganathan SK, Mani MP. Single-stage synthesis of electrospun polyurethane scaffold impregnated with zinc nitrate nanofibers for wound healing applications. J Appl Polym Sci 2018. [DOI: 10.1002/app.46942] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Saravana Kumar Jaganathan
- Department for Management of Science and Technology Development; Ton Duc Thang University; Ho Chi Minh City Vietnam
- Faculty of Applied Sciences; Ton Duc Thang University; Ho Chi Minh City Vietnam
- IJN-UTM Cardiovascular Engineering Centre, Department of Clinical Sciences, Faculty of Biosciences and Medical Engineering; Universiti Teknologi Malaysia; Skuda 81300 Johor Malaysia
| | - Mohan Prasath Mani
- Faculty of Biosciences and Medical Engineering; Universiti Teknologi Malaysia; Skuda 81300 Johor Malaysia
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Gholipourmalekabadi M, Seifalian AM, Urbanska AM, Omrani MD, Hardy JG, Madjd Z, Hashemi SM, Ghanbarian H, Brouki Milan P, Mozafari M, Reis RL, Kundu SC, Samadikuchaksaraei A. 3D Protein-Based Bilayer Artificial Skin for the Guided Scarless Healing of Third-Degree Burn Wounds in Vivo. Biomacromolecules 2018. [PMID: 29529861 DOI: 10.1021/acs.biomac.7b01807] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Severe burn injuries can lead to delays in healing and devastating scar formation. Attempts have been made to develop a suitable skin substitute for the scarless healing of such skin wounds. Currently, there is no effective strategy for completely scarless healing after the thermal injuries. In our recent work, we fabricated and evaluated a 3D protein-based artificial skin made from decellularized human amniotic membrane (AM) and electrospun nanofibrous silk fibroin (ESF) in vitro. We also characterized both biophysical and cell culture investigation to establish in vitro performance of the developed bilayer scaffolds. In this report, we evaluate the appropriate utility of this fabricated bilayered artificial skin in vivo with particular emphasis on healing and scar formation due to the biochemical and biomechanical complexity of the skin. For this work, AM and AM/ESF membranes alone or seeded with adipose-tissue-derived mesenchymal stem cells (AT-MSCs) are implanted on full-thickness burn wounds in mice. The healing efficacy and scar formation are evaluated at 7, 14, and 28 days post-implantation in vivo. Our data reveal that ESF accelerates the wound-healing process through the early recruitment of inflammatory cells such as macrophages into the defective site as well as the up-regulation of angiogenic factors from the AT-MSCs and the facilitation of the remodeling phase. In vivo application of the prepared AM/ESF membrane seeded with the AT-MSCs reduces significantly the post-burn scars. The in vivo data suggest that the potential applications of the AM/ESF bilayered artificial skin may be considered a clinical translational product with stem cells to guide the scarless healing of severe burn injuries.
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Affiliation(s)
| | - Alexander M Seifalian
- Nanotechnology & Regenerative Medicine Commercialization Centre Ltd., The London BioScience Innovation Centre , London , NW1 0NH , United Kingdom
| | - Aleksandra M Urbanska
- Division of Digestive and Liver Diseases, Department of Medicine, Herbert Irving Comprehensive Cancer Center , Columbia University , New York , NY 10032 , United States
| | - Mir Davood Omrani
- Department of Medical Genetics, Faculty of Medicine , ○Cellular & Molecular Biology Research Centre , and ∥Department of Immunology, School of Medicine , and ◆Biotechnology Department, School of Advanced Technologies in Medicine , Shahid Beheshti University of Medical Sciences , Tehran , 19857-17443 Iran
| | | | | | | | | | | | - Masoud Mozafari
- Bioengineering Research Group, Department of Nanotechnology and Advanced Materials , Materials and Energy Research Center (MERC) , P.O. Box 31787-316 , Tehran , Iran
| | - Rui L Reis
- 3Bs Research Group, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine , University of Minho , 4805-017 Barco, Guimaraes , Portugal
| | - Subhas C Kundu
- 3Bs Research Group, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine , University of Minho , 4805-017 Barco, Guimaraes , Portugal
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Kaplan A, Bueno M, Fournier AE. Extracellular functions of 14-3-3 adaptor proteins. Cell Signal 2017; 31:26-30. [DOI: 10.1016/j.cellsig.2016.12.007] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2016] [Revised: 12/13/2016] [Accepted: 12/15/2016] [Indexed: 01/09/2023]
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Xu Y, Kim CS, Saylor DM, Koo D. Polymer degradation and drug delivery in PLGA-based drug-polymer applications: A review of experiments and theories. J Biomed Mater Res B Appl Biomater 2016; 105:1692-1716. [PMID: 27098357 DOI: 10.1002/jbm.b.33648] [Citation(s) in RCA: 223] [Impact Index Per Article: 27.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Revised: 01/25/2016] [Accepted: 02/12/2016] [Indexed: 01/03/2023]
Abstract
Poly (lactic-co-glycolic acid) (PLGA) copolymers have been broadly used in controlled drug release applications. Because these polymers are biodegradable, they provide an attractive option for drug delivery vehicles. There are a variety of material, processing, and physiological factors that impact the degradation rates of PLGA polymers and concurrent drug release kinetics. This work is intended to provide a comprehensive and collective review of the physicochemical and physiological factors that dictate the degradation behavior of PLGA polymers and drug release from contemporary PLGA-based drug-polymer products. In conjunction with the existing experimental results, analytical and numerical theories developed to predict drug release from PLGA-based polymers are summarized and correlated with the experimental observations. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 1692-1716, 2017.
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Affiliation(s)
- Yihan Xu
- Materials Science and Engineering Department, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin, 53211
| | - Chang-Soo Kim
- Materials Science and Engineering Department, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin, 53211
| | - David M Saylor
- Division of Biology, Chemistry, and Materials Science, Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, Maryland, 20993
| | - Donghun Koo
- Materials Science R&D, MilliporeSigma, Milwaukee, Wisconsin, 53209
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Lee DE, Trowbridge RM, Ayoub NT, Agrawal DK. High-mobility Group Box Protein-1, Matrix Metalloproteinases, and Vitamin D in Keloids and Hypertrophic Scars. PLASTIC AND RECONSTRUCTIVE SURGERY-GLOBAL OPEN 2015; 3:e425. [PMID: 26180726 PMCID: PMC4494495 DOI: 10.1097/gox.0000000000000391] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Accepted: 04/23/2015] [Indexed: 01/16/2023]
Abstract
Keloids and hypertrophic scars represent excessive wound healing involving high production of collagen by skin fibroblasts. This review focuses on the role of high-mobility group box protein-1 (HMGB-1), matrix metalloproteinases (MMPs), and vitamin D in these conditions. Although the role of HMGB-1 in keloids and hypertrophic scars is unclear, the effect of HMGB-1 on fibroblasts suggests a profibrotic role and a potential contribution to excessive scarring. MMPs contribute extensively to wound healing and characteristically degrade the extracellular matrix. MMP-1 is decreased in keloids and hypertrophic scars. However, other MMPs, including MMP-2, have been found to be increased and are thought to possibly contribute to keloid expansion through peripheral extracellular matrix catabolism. Many novel therapeutic approaches to keloids and hypertrophic scars target MMPs and aim to increase their levels and catabolic activity. The higher prevalence of keloids in darker skin types may partially be due to a tendency for lower vitamin D levels. The physiologically active form of vitamin D, 1,25(OH)2D3, inhibits the proliferation of keloid fibroblasts, and correlations between vitamin D receptor polymorphisms, such as the TaqI CC genotype, and keloid formation have been reported. Additionally, vitamin D may exert an antifibrotic effect partially mediated by MMPs. Here, we critically discuss whether keloid and hypertrophic scar formation could be predicted based on vitamin D status and vitamin D receptor polymorphisms. Specifically, the findings identified HMGB-1, MMPs, and vitamin D as potential avenues for further clinical investigation and potentially novel therapeutic approaches to prevent the development of keloids and hypertrophic scars.
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Affiliation(s)
- Dylan E. Lee
- From the Center for Clinical and Translational Science, Creighton University School of Medicine, Omaha, Neb.; Brigham and Women’s Hospital, Boston, Mass.; and Westfield Plastic Surgery Center, Omaha, Neb
| | - Ryan M. Trowbridge
- From the Center for Clinical and Translational Science, Creighton University School of Medicine, Omaha, Neb.; Brigham and Women’s Hospital, Boston, Mass.; and Westfield Plastic Surgery Center, Omaha, Neb
| | - Nagi T. Ayoub
- From the Center for Clinical and Translational Science, Creighton University School of Medicine, Omaha, Neb.; Brigham and Women’s Hospital, Boston, Mass.; and Westfield Plastic Surgery Center, Omaha, Neb
| | - Devendra K. Agrawal
- From the Center for Clinical and Translational Science, Creighton University School of Medicine, Omaha, Neb.; Brigham and Women’s Hospital, Boston, Mass.; and Westfield Plastic Surgery Center, Omaha, Neb
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Hartwell R, Lai A, Ghahary A. Modulation of extracellular matrix through keratinocyte–fibroblast crosstalk. ACTA ACUST UNITED AC 2014. [DOI: 10.1586/edm.09.55] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Sun X, Cheng L, Zhu W, Hu C, Jin R, Sun B, Shi Y, Zhang Y, Cui W. Use of ginsenoside Rg3-loaded electrospun PLGA fibrous membranes as wound cover induces healing and inhibits hypertrophic scar formation of the skin. Colloids Surf B Biointerfaces 2013; 115:61-70. [PMID: 24333554 DOI: 10.1016/j.colsurfb.2013.11.030] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2013] [Revised: 10/27/2013] [Accepted: 11/17/2013] [Indexed: 01/23/2023]
Abstract
Prevention of hypertrophic scar formation of the skin requires a complex treatment process, which mainly includes promoting skin regeneration in an early stage while inhibiting hypertrophic formation in a later stage. Electrospinning PLGA with the three-dimensional micro/nano-fibrous structure and as drugs carrier, could be used as an excellent skin repair scaffold. However, it is difficult to combine the advantage of nanofibrous membranes and drug carriers to achieve early and late treatment. In this study, Ginsenoside-Rg3 (Rg3) loaded hydrophilic poly(D,L-lactide-co-glycolide) (PLGA) electrospun fibrous membranes coated with chitosan (CS) were fabricated by combining electrospinning and pressure-driven permeation (PDP) technology. The PDP method was able to significantly improve the hydrophilicity of electrospun fibrous membranes through surface coating of the hydrophilic fibers with CS, while maintaining the Rg3 releasing rate of PLGA electrospun fibrous membranes. Experimental wounds of animal covered with PDP treated fibrous membranes completely re-epithelialized and healed 3-4 days earlier than the wounds in control groups. Scar elevation index (SEI) measurements and histologic characteristics revealed that Rg3 significantly inhibited scar formation 28 days post-surgery. Moreover, RT-PCR assays and western blot analysis revealed that at day 28 after wound induction the expression of VEGF, mRNA and Collagen Type I in the scars treated with Rg3 was decreased compared to control groups. Taken together PLGA-Rg3/CS electrospun fibrous membranes induced repair of tissue damage in the early stage and inhibited scar formation in the late stage of wound healing. These dual-functional membranes present a combined therapeutic approach for inhibiting hypertrophic scars of the skin.
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Affiliation(s)
- Xiaoming Sun
- Department of Plastic and Reconstructive Surgery, Ninth People's Hospital Affiliated to Medical School of Shanghai Jiao Tong University, 639 Zhi Zao Ju Road, Shanghai 200011, PR China
| | - Liying Cheng
- Department of Plastic and Reconstructive Surgery, Ninth People's Hospital Affiliated to Medical School of Shanghai Jiao Tong University, 639 Zhi Zao Ju Road, Shanghai 200011, PR China
| | - Wankun Zhu
- School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, PR China
| | - Changmin Hu
- Orthopedic Institute, Soochow University, 708 Renmin Road, Suzhou, Jiangsu 215006, PR China; School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, PR China
| | - Rong Jin
- Department of Plastic and Reconstructive Surgery, Ninth People's Hospital Affiliated to Medical School of Shanghai Jiao Tong University, 639 Zhi Zao Ju Road, Shanghai 200011, PR China
| | - Baoshan Sun
- Department of Plastic and Reconstructive Surgery, Ninth People's Hospital Affiliated to Medical School of Shanghai Jiao Tong University, 639 Zhi Zao Ju Road, Shanghai 200011, PR China
| | - Yaoming Shi
- Department of Plastic and Reconstructive Surgery, Ninth People's Hospital Affiliated to Medical School of Shanghai Jiao Tong University, 639 Zhi Zao Ju Road, Shanghai 200011, PR China
| | - Yuguang Zhang
- Department of Plastic and Reconstructive Surgery, Ninth People's Hospital Affiliated to Medical School of Shanghai Jiao Tong University, 639 Zhi Zao Ju Road, Shanghai 200011, PR China.
| | - Wenguo Cui
- Orthopedic Institute, Soochow University, 708 Renmin Road, Suzhou, Jiangsu 215006, PR China; Department of Orthopedics, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, Jiangsu 215006, PR China.
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Cheng L, Sun X, Li B, Hu C, Yang H, Zhang Y, Cui W. Electrospun Ginsenoside Rg3/poly(lactic-co-glycolic acid) fibers coated with hyaluronic acid for repairing and inhibiting hypertrophic scars. J Mater Chem B 2013; 1:4428-4437. [DOI: 10.1039/c3tb20441c] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Rahmani-Neishaboor E, Jallili R, Hartwell R, Leung V, Carr N, Ghahary A. Topical application of a film-forming emulgel dressing that controls the release of stratifin and acetylsalicylic acid and improves/prevents hypertrophic scarring. Wound Repair Regen 2012; 21:55-65. [DOI: 10.1111/j.1524-475x.2012.00857.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2011] [Accepted: 08/13/2012] [Indexed: 01/29/2023]
Affiliation(s)
- Elham Rahmani-Neishaboor
- Department of Surgery; Division of Plastic Surgery; University of British Columbia; Vancouver BC Canada
| | - Reza Jallili
- Department of Surgery; Division of Plastic Surgery; University of British Columbia; Vancouver BC Canada
| | - Ryan Hartwell
- Department of Surgery; Division of Plastic Surgery; University of British Columbia; Vancouver BC Canada
| | - Victor Leung
- Department of Surgery; Division of Plastic Surgery; University of British Columbia; Vancouver BC Canada
| | - Nicholas Carr
- Department of Surgery; Division of Plastic Surgery; University of British Columbia; Vancouver BC Canada
| | - Aziz Ghahary
- Department of Surgery; Division of Plastic Surgery; University of British Columbia; Vancouver BC Canada
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Rahmani-Neishaboor E, Hartwell R, Jalili R, Jackson J, Brown E, Ghahary A. Localized controlled release of stratifin reduces implantation-induced dermal fibrosis. Acta Biomater 2012; 8:3660-8. [PMID: 22743110 DOI: 10.1016/j.actbio.2012.06.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2012] [Revised: 06/17/2012] [Accepted: 06/19/2012] [Indexed: 10/28/2022]
Abstract
Localized controlled release of anti-fibrogenic factors can potentially prevent tissue fibrosis surrounding biomedical prostheses, such as vascular stents and breast implants. We have previously demonstrated that therapeutic intervention with topically applied stratifin in a rabbit ear fibrotic model not only prevents dermal fibrosis but also promotes more normal tissue repair by regulating extracellular matrix deposition. In this work, the anti-fibrogenic effect of a controlled release form of stratifin was investigated in the prevention of fibrosis induced by dermal poly(lactic-co-glycolic acid) (PLGA) microsphere/poly(vinyl alcohol) (PVA) hydrogel implants. Pharmacodynamic effects were evaluated by histopathological examination of subcutaneous tissue surrounding implanted composites. Controlled release of stratifin from PLGA microsphere/PVA hydrogel implants significantly moderated dermal fibrosis and inflammation by reducing collagen deposition (30%), total tissue cellularity (48%) and infiltrated CD3(+) immune cells (81%) in the surrounding tissue compared with the stratifin-free implants. The controlled release of stratifin from implants markedly increased the level of matrix metalloproteinase-1 expression in the surrounding tissue, which resulted in less collagen deposition. These stratifin-eluting PLGA/PVA composites show promise as coatings to decrease the typical fibrosis exhibited around implanted biomedical prostheses, such as breast implants and vascular stents.
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Mittal A, Kumar N. Drug-Loaded Polymeric Composite Skin Graft for Infection-Free Wound Healing: Fabrication, Characterization, Cell Proliferation, Migration, and Antimicrobial Activity. Pharm Res 2012; 29:3110-21. [DOI: 10.1007/s11095-012-0803-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2012] [Accepted: 06/07/2012] [Indexed: 10/28/2022]
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Hydrogels as drug-delivery platforms: physicochemical barriers and solutions. Ther Deliv 2012; 3:775-86. [DOI: 10.4155/tde.12.48] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The properties of hydrogels, in particular their high biocompatibility and water sorption uptake, make hydrogels very attractive in drug delivery and biomedical devices. These favorable features of hydrogels are compromised by certain structural limitations such as those associated with their low mechanical strength in the swollen state. This review highlights the most important challenges that may seriously affect the practical implementation of hydrogels in clinical practice and the solutions that may be applied to overcome these limitations.
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Ulery BD, Nair LS, Laurencin CT. Biomedical Applications of Biodegradable Polymers. JOURNAL OF POLYMER SCIENCE. PART B, POLYMER PHYSICS 2011; 49:832-864. [PMID: 21769165 PMCID: PMC3136871 DOI: 10.1002/polb.22259] [Citation(s) in RCA: 1169] [Impact Index Per Article: 89.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Utilization of polymers as biomaterials has greatly impacted the advancement of modern medicine. Specifically, polymeric biomaterials that are biodegradable provide the significant advantage of being able to be broken down and removed after they have served their function. Applications are wide ranging with degradable polymers being used clinically as surgical sutures and implants. In order to fit functional demand, materials with desired physical, chemical, biological, biomechanical and degradation properties must be selected. Fortunately, a wide range of natural and synthetic degradable polymers has been investigated for biomedical applications with novel materials constantly being developed to meet new challenges. This review summarizes the most recent advances in the field over the past 4 years, specifically highlighting new and interesting discoveries in tissue engineering and drug delivery applications.
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Affiliation(s)
- Bret D. Ulery
- Department of Orthopaedic Surgery, New England Musculoskeletal Institute, University of Connecticut Health Center, Farmington, Connecticut 06030
- Institute of Regenerative Engineering, University of Connecticut Health Center, Farmington, Connecticut 06030
| | - Lakshmi S. Nair
- Department of Orthopaedic Surgery, New England Musculoskeletal Institute, University of Connecticut Health Center, Farmington, Connecticut 06030
- Institute of Regenerative Engineering, University of Connecticut Health Center, Farmington, Connecticut 06030
- Department of Chemical, Materials & Biomolecular Engineering, University of Connecticut, Storrs, Connecticut 06268
| | - Cato T. Laurencin
- Department of Orthopaedic Surgery, New England Musculoskeletal Institute, University of Connecticut Health Center, Farmington, Connecticut 06030
- Institute of Regenerative Engineering, University of Connecticut Health Center, Farmington, Connecticut 06030
- Department of Chemical, Materials & Biomolecular Engineering, University of Connecticut, Storrs, Connecticut 06268
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