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Jurkunas UV, Yin J, Johns LK, Li S, Negre H, Shaw KL, Samarakoon L, Ayala AR, Kheirkhah A, Katikireddy K, Gauthier A, Ong Tone S, Kaufman AR, Ellender S, Hernandez Rodriguez DE, Daley H, Dana R, Armant M, Ritz J. Cultivated autologous limbal epithelial cell (CALEC) transplantation: Development of manufacturing process and clinical evaluation of feasibility and safety. SCIENCE ADVANCES 2023; 9:eadg6470. [PMID: 37595035 PMCID: PMC10438443 DOI: 10.1126/sciadv.adg6470] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 07/18/2023] [Indexed: 08/20/2023]
Abstract
To treat unilateral limbal stem cell (LSC) deficiency, we developed cultivated autologous limbal epithelial cells (CALEC) using an innovative xenobiotic-free, serum-free, antibiotic-free, two-step manufacturing process for LSC isolation and expansion onto human amniotic membrane with rigorous quality control in a good manufacturing practices facility. Limbal biopsies were used to generate CALEC constructs, and final grafts were evaluated by noninvasive scanning microscopy and tested for viability and sterility. Cultivated cells maintained epithelial cell phenotype with colony-forming and proliferative capacities. Analysis of LSC biomarkers showed preservation of "stemness." After preclinical development, a phase 1 clinical trial enrolled five patients with unilateral LSC deficiency. Four of these patients received CALEC transplants, establishing preliminary feasibility. Clinical case histories are reported, with no primary safety events. On the basis of these results, a second recruitment phase of the trial was opened to provide longer term safety and efficacy data on more patients.
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Affiliation(s)
- Ula V. Jurkunas
- Department of Ophthalmology, Massachusetts Eye and Ear, Harvard Medical School, Boston, MA, USA
| | - Jia Yin
- Department of Ophthalmology, Massachusetts Eye and Ear, Harvard Medical School, Boston, MA, USA
| | - Lynette K. Johns
- Department of Ophthalmology, Massachusetts Eye and Ear, Harvard Medical School, Boston, MA, USA
| | - Sanming Li
- Department of Ophthalmology, Massachusetts Eye and Ear, Harvard Medical School, Boston, MA, USA
| | - Helene Negre
- Connell and O'Reilly Families Cell Manipulation Core Facility, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Kit L. Shaw
- Connell and O'Reilly Families Cell Manipulation Core Facility, Dana-Farber Cancer Institute, Boston, MA, USA
| | | | | | - Ahmad Kheirkhah
- Department of Ophthalmology, Massachusetts Eye and Ear, Harvard Medical School, Boston, MA, USA
| | - Kishore Katikireddy
- Department of Ophthalmology, Massachusetts Eye and Ear, Harvard Medical School, Boston, MA, USA
| | - Alex Gauthier
- Department of Ophthalmology, Massachusetts Eye and Ear, Harvard Medical School, Boston, MA, USA
| | - Stephan Ong Tone
- Department of Ophthalmology, Massachusetts Eye and Ear, Harvard Medical School, Boston, MA, USA
| | - Aaron R. Kaufman
- Department of Ophthalmology, Massachusetts Eye and Ear, Harvard Medical School, Boston, MA, USA
| | - Stacey Ellender
- Department of Ophthalmology, Massachusetts Eye and Ear, Harvard Medical School, Boston, MA, USA
| | | | - Heather Daley
- Connell and O'Reilly Families Cell Manipulation Core Facility, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Reza Dana
- Department of Ophthalmology, Massachusetts Eye and Ear, Harvard Medical School, Boston, MA, USA
| | - Myriam Armant
- TransLab, Translational Research Program, Boston Children’s Hospital, Boston, MA, USA
| | - Jerome Ritz
- Connell and O'Reilly Families Cell Manipulation Core Facility, Dana-Farber Cancer Institute, Boston, MA, USA
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
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2
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Borrelli M, Witt J, Roth M, Reichl S, Bradenbrink P, Schoppe M, Schrader S, Geerling G. Keratin films for ocular surface reconstruction: Wound healing in an in-vivo model. Exp Eye Res 2023; 227:109356. [PMID: 36563893 DOI: 10.1016/j.exer.2022.109356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 11/16/2022] [Accepted: 12/19/2022] [Indexed: 12/24/2022]
Abstract
The most commonly used tissue substitute for ocular surface reconstruction is human amniotic membrane (AM). Because of its low biomechanical strength and intransparency there is a need to search for alternatives of consistent quality. This study, further explored the biocompatibility of Keratin Film (KF) and its ability to sustain corneal epithelial wound healing. In three equal groups of 5 New Zeeland white rabbits a 4 mm superficial keratectomy was created in the right eye. Five eyes received a KF, five a human AM graft and the remaining five no implant. All eyes were treated with ofloxacin and dexamethasone eye drops and followed up for 10 days. Corneal fluorescein staining, vascularization, and transparency were assessed using slit lamp biomicroscopy according to a standardized grading score during and at the end of follow-up. The corneal-scleral-button was excised and processed for histology. After 10 days all eyes which had received a KF showed complete epithelial healing and no signs of neovascularization. In the AM group 1 eye showed a persistent epithelial defect at day 10 and 2 eyes showed neovascularization at day 7 resolving at day 10. Transparency improved progressively both in the KF group as well as in the AM group towards the end of the follow. Histology showed a multilayer epithelium firmly adherent to the KF with no evidence of keratocyte migration or inflammatory reaction in the corneal stroma. In this study on rabbit eyes KF better supported corneal epithelial wound healing than amniotic membrane.
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Affiliation(s)
- M Borrelli
- Department of Ophthalmology, University of Duesseldorf, Germany.
| | - J Witt
- Department of Ophthalmology, University of Duesseldorf, Germany
| | - M Roth
- Department of Ophthalmology, University of Duesseldorf, Germany
| | - S Reichl
- Institute of Pharmaceutical Technology, Technical University of Braunschweig, Germany
| | - P Bradenbrink
- Department of Ophthalmology, University of Duesseldorf, Germany
| | - M Schoppe
- Department of Pathology, University of Duesseldorf, Germany
| | - S Schrader
- Department of Ophthalmology, Carl von Ossietzky University Oldenburg, Germany
| | - G Geerling
- Department of Ophthalmology, University of Duesseldorf, Germany
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3
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Collantes M, Vairo C, Erhard Á, Navas C, Villullas S, Ecay M, Pareja F, Quincoces G, Gainza G, Peñuelas I. Preclinical safety of negatively charged microspheres (NCMs): optimization of radiolabeling for in vivo and ex vivo biodistribution studies after topical administration on full-thickness wounds in a rat model. Eur J Pharm Biopharm 2022; 177:61-67. [PMID: 35697288 DOI: 10.1016/j.ejpb.2022.06.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 06/01/2022] [Accepted: 06/04/2022] [Indexed: 11/15/2022]
Abstract
Negatively charged microspheres (NCMs) are postulated as a new form of treatment for chronic wounds. Despite the efficacy shown at clinical level, more studies are required to demonstrate their safety and local effect. The objective of the work was to confirm the lack of NCM systemic absorption performing a biodistribution study of the NCMs in an open wound rat animal model. To this end, radiolabeling of NCMs with technetium-99m was optimized and biodistribution studies were performed by in vivo SPEC/CT imaging and ex vivo counting during 24 h after topical administration. The studies were performed on animals treated with a single or repeated dose to study the effect of macrophages during a prolonged treatment. NCM radiolabeling was achieved in a simple, efficient and stable manner with high yield. SPECT/CT images showed that almost all NCMs (about 85 %) remained on the wound for 24 h either after single or multiple administrations. Ex vivo biodistribution studies confirmed that there was no accumulation of NCMs in any organ or tissue except in the wound area, suggesting a lack of absorption. In conclusion, NCMs can be considered safe as local wound treatment since they remain at the administration area.
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Affiliation(s)
- María Collantes
- Translational Molecular Imaging Unit (UNIMTRA), Clínica Universidad de Navarra, Avenida Pío XII, 31080, Pamplona, Spain; RADIOMIN Research Group, Radiopharmacy Unit, Clínica Universidad de Navarra, Avenida Pío XII, 31080, Pamplona, Spain; Nuclear Medicine Department, Clínica Universidad de Navarra, Avenida Pío XII, 31080, Pamplona, Spain; Instituto de Investigación Sanitaria de Navarra (IdiSNA), Spain
| | - Claudia Vairo
- BioKeralty Research Institute AIE, Albert Einstein, 25-E3, 01510, Miñano, Spain
| | - Álvaro Erhard
- Translational Molecular Imaging Unit (UNIMTRA), Clínica Universidad de Navarra, Avenida Pío XII, 31080, Pamplona, Spain; RADIOMIN Research Group, Radiopharmacy Unit, Clínica Universidad de Navarra, Avenida Pío XII, 31080, Pamplona, Spain; Nuclear Medicine Department, Clínica Universidad de Navarra, Avenida Pío XII, 31080, Pamplona, Spain
| | - Cristina Navas
- Translational Molecular Imaging Unit (UNIMTRA), Clínica Universidad de Navarra, Avenida Pío XII, 31080, Pamplona, Spain
| | - Silvia Villullas
- BioKeralty Research Institute AIE, Albert Einstein, 25-E3, 01510, Miñano, Spain
| | - Margarita Ecay
- Translational Molecular Imaging Unit (UNIMTRA), Clínica Universidad de Navarra, Avenida Pío XII, 31080, Pamplona, Spain; RADIOMIN Research Group, Radiopharmacy Unit, Clínica Universidad de Navarra, Avenida Pío XII, 31080, Pamplona, Spain; Nuclear Medicine Department, Clínica Universidad de Navarra, Avenida Pío XII, 31080, Pamplona, Spain
| | - Félix Pareja
- Nuclear Medicine Department, Clínica Universidad de Navarra, Avenida Pío XII, 31080, Pamplona, Spain
| | - Gemma Quincoces
- RADIOMIN Research Group, Radiopharmacy Unit, Clínica Universidad de Navarra, Avenida Pío XII, 31080, Pamplona, Spain; Nuclear Medicine Department, Clínica Universidad de Navarra, Avenida Pío XII, 31080, Pamplona, Spain; Instituto de Investigación Sanitaria de Navarra (IdiSNA), Spain
| | - Garazi Gainza
- BioKeralty Research Institute AIE, Albert Einstein, 25-E3, 01510, Miñano, Spain.
| | - Iván Peñuelas
- Translational Molecular Imaging Unit (UNIMTRA), Clínica Universidad de Navarra, Avenida Pío XII, 31080, Pamplona, Spain; RADIOMIN Research Group, Radiopharmacy Unit, Clínica Universidad de Navarra, Avenida Pío XII, 31080, Pamplona, Spain; Nuclear Medicine Department, Clínica Universidad de Navarra, Avenida Pío XII, 31080, Pamplona, Spain; Instituto de Investigación Sanitaria de Navarra (IdiSNA), Spain
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Schwab R, Reichl S. Dexamethasone-loaded keratin films for ocular surface reconstruction. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2022; 33:29. [PMID: 35244790 PMCID: PMC9050765 DOI: 10.1007/s10856-021-06638-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Accepted: 12/14/2021] [Indexed: 06/14/2023]
Abstract
Amniotic membrane (AM) is often applied as a substitute material during ocular surface reconstruction. However, since AM has several disadvantages, alternative materials must be considered for this application. Keratin films made from human hair (KFs) have previously been presented as a promising option; they exhibited suitable characteristics and satisfactory biocompatibility in an in vivo rabbit model. Nevertheless, dexamethasone (DEX) eye drops are necessary after surgery to suppress inflammation. Since eye drops must be administered frequently, this might result in poor patient compliance, and the release of DEX at the transplant site would be clinically beneficial. Therefore, we aimed to incorporate DEX into KFs without hindering the positive film characteristics. Drug-loaded KFs were generated either by suspension technique or by the addition of solubilizing agents. The resulting specimens were analyzed regarding appearance, loading capacity, transparency, mechanical characteristics, swelling behavior and in vitro release. Furthermore, biocompatibility was assessed in vitro by determining the cell viability, seeding efficiency and growth behavior of corneal epithelial cells. The amount of incorporated DEX influenced the transparency and biomechanical properties of the films, but even highly loaded films showed properties similar to those of AM. The suspension technique was identified as the best incorporation approach regarding chemical stability and prolonged DEX release. Moreover, suspended DEX in the films did not negatively impact cell seeding efficiencies, and the cell-growth behaviors on the specimens with moderate DEX loads were satisfactory. This suggest that these films could comprise a suitable alternative material with additional anti-inflammatory activity for ocular surface reconstruction. Graphical abstract.
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Affiliation(s)
- Rebekka Schwab
- Institut für Pharmazeutische Technologie, Technische Universität Braunschweig, Braunschweig, Germany
| | - Stephan Reichl
- Institut für Pharmazeutische Technologie, Technische Universität Braunschweig, Braunschweig, Germany.
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Hu X, Ricci S, Naranjo S, Hill Z, Gawason P. Protein and Polysaccharide-Based Electroactive and Conductive Materials for Biomedical Applications. Molecules 2021; 26:4499. [PMID: 34361653 PMCID: PMC8348981 DOI: 10.3390/molecules26154499] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 07/23/2021] [Accepted: 07/24/2021] [Indexed: 11/16/2022] Open
Abstract
Electrically responsive biomaterials are an important and emerging technology in the fields of biomedical and material sciences. A great deal of research explores the integral role of electrical conduction in normal and diseased cell biology, and material scientists are focusing an even greater amount of attention on natural and hybrid materials as sources of biomaterials which can mimic the properties of cells. This review establishes a summary of those efforts for the latter group, detailing the current materials, theories, methods, and applications of electrically conductive biomaterials fabricated from protein polymers and polysaccharides. These materials can be used to improve human life through novel drug delivery, tissue regeneration, and biosensing technologies. The immediate goal of this review is to establish fabrication methods for protein and polysaccharide-based materials that are biocompatible and feature modular electrical properties. Ideally, these materials will be inexpensive to make with salable production strategies, in addition to being both renewable and biocompatible.
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Affiliation(s)
- Xiao Hu
- Department of Physics and Astronomy, Rowan University, Glassboro, NJ 08028, USA; (S.R.); (Z.H.)
- Department of Biomedical Engineering, Rowan University, Glassboro, NJ 08028, USA; (S.N.); (P.G.)
- Department of Molecular and Cellular Biosciences, Rowan University, Glassboro, NJ 08028, USA
| | - Samuel Ricci
- Department of Physics and Astronomy, Rowan University, Glassboro, NJ 08028, USA; (S.R.); (Z.H.)
| | - Sebastian Naranjo
- Department of Biomedical Engineering, Rowan University, Glassboro, NJ 08028, USA; (S.N.); (P.G.)
| | - Zachary Hill
- Department of Physics and Astronomy, Rowan University, Glassboro, NJ 08028, USA; (S.R.); (Z.H.)
| | - Peter Gawason
- Department of Biomedical Engineering, Rowan University, Glassboro, NJ 08028, USA; (S.N.); (P.G.)
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Feroz S, Muhammad N, Ranayake J, Dias G. Keratin - Based materials for biomedical applications. Bioact Mater 2020; 5:496-509. [PMID: 32322760 PMCID: PMC7171262 DOI: 10.1016/j.bioactmat.2020.04.007] [Citation(s) in RCA: 106] [Impact Index Per Article: 26.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 03/27/2020] [Accepted: 04/06/2020] [Indexed: 12/22/2022] Open
Abstract
Keratin constitutes the major component of the feather, hair, hooves, horns, and wool represents a group of biological material having high cysteine content (7-13%) as compared to other structural proteins. Keratin -based biomaterials have been investigated extensively over the past few decades due to their intrinsic biological properties and excellent biocompatibility. Unlike other natural polymers such as starch, collagen, chitosan, the complex three-dimensional structure of keratin requires the use of harsh chemical conditions for their dissolution and extraction. The most commonly used methods for keratin extraction are oxidation, reduction, steam explosion, microbial method, microwave irradiation and use of ionic liquids. Keratin -based materials have been used extensively for various biomedical applications such as drug delivery, wound healing, tissue engineering. This review covers the structure, properties, history of keratin research, methods of extraction and some recent advancements related to the use of keratin derived biomaterials in the form of a 3-D scaffold, films, fibers, and hydrogels.
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Affiliation(s)
- Sandleen Feroz
- Department of Anatomy, School of Biomedical Sciences University of Otago, Otago, 9016, New Zealand
| | - Nawshad Muhammad
- Interdisciplinary Research Centre in Biomedical Materials (IRCBM), COMSATS University Islamabad, Lahore Campus, Pakistan
| | - Jithendra Ranayake
- Department of Anatomy, School of Biomedical Sciences University of Otago, Otago, 9016, New Zealand
| | - George Dias
- Department of Anatomy, School of Biomedical Sciences University of Otago, Otago, 9016, New Zealand
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Immunologische Toleranz von intraokularen Zilien nach penetrierender Hornhautverletzung. Ophthalmologe 2020; 117:914-916. [DOI: 10.1007/s00347-019-01010-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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8
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Gough CR, Rivera-Galletti A, Cowan DA, Salas-de la Cruz D, Hu X. Protein and Polysaccharide-Based Fiber Materials Generated from Ionic Liquids: A Review. Molecules 2020; 25:E3362. [PMID: 32722182 PMCID: PMC7435976 DOI: 10.3390/molecules25153362] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 07/19/2020] [Accepted: 07/24/2020] [Indexed: 02/06/2023] Open
Abstract
Natural biomacromolecules such as structural proteins and polysaccharides are composed of the basic building blocks of life: amino acids and carbohydrates. Understanding their molecular structure, self-assembly and interaction in solvents such as ionic liquids (ILs) is critical for unleashing a flora of new materials, revolutionizing the way we fabricate multi-structural and multi-functional systems with tunable physicochemical properties. Ionic liquids are superior to organic solvents because they do not produce unwanted by-products and are considered green substitutes because of their reusability. In addition, they will significantly improve the miscibility of biopolymers with other materials while maintaining the mechanical properties of the biopolymer in the final product. Understanding and controlling the physicochemical properties of biopolymers in ionic liquids matrices will be crucial for progress leading to the ability to fabricate robust multi-level structural 1D fiber materials. It will also help to predict the relationship between fiber conformation and protein secondary structures or carbohydrate crystallinity, thus creating potential applications for cell growth signaling, ionic conductivity, liquid diffusion and thermal conductivity, and several applications in biomedicine and environmental science. This will also enable the regeneration of biopolymer composite fiber materials with useful functionalities and customizable options critical for additive manufacturing. The specific capabilities of these fiber materials have been shown to vary based on their fabrication methods including electrospinning and post-treatments. This review serves to provide basic knowledge of these commonly utilized protein and polysaccharide biopolymers and their fiber fabrication methods from various ionic liquids, as well as the effect of post-treatments on these fiber materials and their applications in biomedical and pharmaceutical research, wound healing, environmental filters and sustainable and green chemistry research.
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Affiliation(s)
- Christopher R. Gough
- Department of Physics and Astronomy, Rowan University, Glassboro, NJ 08028, USA; (C.R.G.); (A.R.-G.); (D.A.C.)
- Department of Chemistry and Biochemistry, Rowan University, Glassboro, NJ 08028, USA
| | - Ashley Rivera-Galletti
- Department of Physics and Astronomy, Rowan University, Glassboro, NJ 08028, USA; (C.R.G.); (A.R.-G.); (D.A.C.)
- Department of Chemistry and Biochemistry, Rowan University, Glassboro, NJ 08028, USA
| | - Darrel A. Cowan
- Department of Physics and Astronomy, Rowan University, Glassboro, NJ 08028, USA; (C.R.G.); (A.R.-G.); (D.A.C.)
- Department of Chemistry and Biochemistry, Rowan University, Glassboro, NJ 08028, USA
| | - David Salas-de la Cruz
- Department of Chemistry, and Center for Computational and Integrative Biology, Camden, NJ 08102, USA;
| | - Xiao Hu
- Department of Physics and Astronomy, Rowan University, Glassboro, NJ 08028, USA; (C.R.G.); (A.R.-G.); (D.A.C.)
- Department of Biomedical Engineering, Rowan University, Glassboro, NJ 08028, USA
- Department of Molecular and Cellular Biosciences, Rowan University, Glassboro, NJ 08028, USA
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Overcoming the Inflammatory Stage of Non-Healing Wounds: In Vitro Mechanism of Action of Negatively Charged Microspheres (NCMs). NANOMATERIALS 2020; 10:nano10061108. [PMID: 32503283 PMCID: PMC7353184 DOI: 10.3390/nano10061108] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Revised: 05/23/2020] [Accepted: 06/01/2020] [Indexed: 01/20/2023]
Abstract
Negatively charged microspheres (NCMs) represent a new therapeutic approach for wound healing since recent clinical trials have shown NCM efficacy in the recovery of hard-to-heal wounds that tend to stay in the inflammatory phase, unlocking the healing process. The aim of this study was to elucidate the NCM mechanism of action. NCMs were extracted from a commercial microsphere formulation (PolyHeal® Micro) and cytotoxicity, attachment, proliferation and viability assays were performed in keratinocytes and dermal fibroblasts, while macrophages were used for the phagocytosis and polarization assays. We demonstrated that cells tend to attach to the microsphere surface, and that NCMs are biocompatible and promote cell proliferation at specific concentrations (50 and 10 NCM/cell) by a minimum of 3 fold compared to the control group. Furthermore, NCM internalization by macrophages seemed to drive these cells to a noninflammatory condition, as demonstrated by the over-expression of CD206 and the under-expression of CD64, M2 and M1 markers, respectively. NCMs are an effective approach for reverting the chronic inflammatory state of stagnant wounds (such as diabetic wounds) and thus for improving wound healing.
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Moringo NA, Shen H, Tauzin LJ, Wang W, Landes CF. Polymer Free Volume Effects on Protein Dynamics in Polystyrene Revealed by Single-Molecule Spectroscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:2330-2338. [PMID: 32078328 DOI: 10.1021/acs.langmuir.9b03535] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Protein-polymer interactions are critical to applications ranging from biomedical devices to chromatographic separations. The mechanistic relationship between the microstructure of polymer chains and protein interactions is challenging to quantify and not well studied. Here, single-molecule microscopy is used to compare the dynamics of two model proteins, α-lactalbumin and lysozyme, at the interface of uncharged polystyrene with varied molecular weights. The two proteins exhibit different surface interaction mechanisms despite having a similar size and structure. α-Lactalbumin exhibits interfacial adsorption-desorption with residence times that depend on polymer molecular weight. Lysozyme undergoes a continuous time random walk at the polystyrene surface with residence times that also depend on the molecular weight of polystyrene. Single-molecule observables suggest that the hindered continuous time random walk dynamics displayed by lysozyme are determined by the polystyrene free volume, a finding supported by thermal annealing and solvent quality studies. Hindered dynamics are dominated by short-range hydrophobic interactions where the contributions of electrostatic forces are negligible. This work establishes a relationship between the microscale structure (i.e., free volume) of polystyrene polymer chains to nanoscale interfacial protein dynamics.
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11
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Borrelli M, Geerling G, Spaniol K, Witt J. Eye Socket Regeneration and Reconstruction. Curr Eye Res 2020; 45:253-264. [DOI: 10.1080/02713683.2020.1712423] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- M. Borrelli
- Department of Ophthalmology, University Hospital Duesseldorf, Duesseldorf, Germany
| | - G. Geerling
- Department of Ophthalmology, University Hospital Duesseldorf, Duesseldorf, Germany
| | - K. Spaniol
- Department of Ophthalmology, University Hospital Duesseldorf, Duesseldorf, Germany
| | - J. Witt
- Department of Ophthalmology, University Hospital Duesseldorf, Duesseldorf, Germany
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12
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Lin CW, Yang KC, Cheng NC, Tsai WB, Lou KL, Yu J. Evaluation of adhesion, proliferation, and differentiation of human adipose-derived stem cells on keratin. JOURNAL OF POLYMER RESEARCH 2018. [DOI: 10.1007/s10965-018-1446-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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13
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Moringo NA, Shen H, Tauzin LJ, Wang W, Bishop LDC, Landes CF. Variable Lysozyme Transport Dynamics on Oxidatively Functionalized Polystyrene Films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:10818-10828. [PMID: 28937222 DOI: 10.1021/acs.langmuir.7b02641] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Tuning protein adsorption dynamics at polymeric interfaces is of great interest to many biomedical and material applications. Functionalization of polymer surfaces is a common method to introduce application-specific surface chemistries to a polymer interface. In this work, single-molecule fluorescence microscopy is utilized to determine the adsorption dynamics of lysozyme, a well-studied antibacterial protein, at the interface of polystyrene oxidized via UV exposure and oxygen plasma and functionalized by ligand grafting to produce varying degrees of surface hydrophilicity, surface roughness, and induced oxygen content. Single-molecule tracking indicates lysozyme loading capacities, and surface mobility at the polymer interface is hindered as a result of all functionalization techniques. Adsorption dynamics of lysozyme depend on the extent and the specificity of the oxygen functionalities introduced to the polystyrene surface. Hindered adsorption and mobility are dominated by hydrophobic effects attributed to water hydration layer formation at the functionalized polystyrene surfaces.
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Affiliation(s)
- Nicholas A Moringo
- Department of Chemistry, ‡Department of Electrical and Computer Engineering, and §Smalley-Curl Institute, Rice University , Houston, Texas 77251, United States
| | - Hao Shen
- Department of Chemistry, ‡Department of Electrical and Computer Engineering, and §Smalley-Curl Institute, Rice University , Houston, Texas 77251, United States
| | - Lawrence J Tauzin
- Department of Chemistry, ‡Department of Electrical and Computer Engineering, and §Smalley-Curl Institute, Rice University , Houston, Texas 77251, United States
| | - Wenxiao Wang
- Department of Chemistry, ‡Department of Electrical and Computer Engineering, and §Smalley-Curl Institute, Rice University , Houston, Texas 77251, United States
| | - Logan D C Bishop
- Department of Chemistry, ‡Department of Electrical and Computer Engineering, and §Smalley-Curl Institute, Rice University , Houston, Texas 77251, United States
| | - Christy F Landes
- Department of Chemistry, ‡Department of Electrical and Computer Engineering, and §Smalley-Curl Institute, Rice University , Houston, Texas 77251, United States
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14
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Ferraris S, Truffa Giachet F, Miola M, Bertone E, Varesano A, Vineis C, Cochis A, Sorrentino R, Rimondini L, Spriano S. Nanogrooves and keratin nanofibers on titanium surfaces aimed at driving gingival fibroblasts alignment and proliferation without increasing bacterial adhesion. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 76:1-12. [DOI: 10.1016/j.msec.2017.02.152] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Revised: 02/23/2017] [Accepted: 02/25/2017] [Indexed: 01/07/2023]
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Lin YH, Huang KW, Chen SY, Cheng NC, Yu J. Keratin/chitosan UV-crosslinked composites promote the osteogenic differentiation of human adipose derived stem cells. J Mater Chem B 2017; 5:4614-4622. [DOI: 10.1039/c7tb00188f] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A photocrosslinkable natural polymer, keratin/chitosan composite, promotes the aggregation and osteogenic differentiation of human adipose derived stem cells.
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Affiliation(s)
- Yung-Hao Lin
- Department of Chemical Engineering
- College of Engineering
- National Taiwan University
- Taipei 10617
- Taiwan
| | - Kai-Wen Huang
- Department of Chemical Engineering
- College of Engineering
- National Taiwan University
- Taipei 10617
- Taiwan
| | - Shao-Yung Chen
- Department of Chemical Engineering
- College of Engineering
- National Taiwan University
- Taipei 10617
- Taiwan
| | - Nai-Chen Cheng
- Department of Surgery
- National Taiwan University Hospital and College of Medicine
- National Taiwan University
- Taipei 100
- Taiwan
| | - Jiashing Yu
- Department of Chemical Engineering
- College of Engineering
- National Taiwan University
- Taipei 10617
- Taiwan
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16
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Shavandi A, Bekhit AEDA, Carne A, Bekhit A. Evaluation of keratin extraction from wool by chemical methods for bio-polymer application. J BIOACT COMPAT POL 2016. [DOI: 10.1177/0883911516662069] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
This study investigated some physicochemical properties of keratin extracted from Merino wool using five chemical extraction methods: alkali hydrolysis, sulfitolysis, reduction, oxidation, and extraction using ionic liquid. The ionic liquid method produced the highest protein yield (95%), followed by sulfitolysis method (89%), while the highest extraction yield was obtained with the reduction method (54%). The lowest yield was obtained with the oxidation method (6%). The oxidation extract contained higher molecular weight (>40 kDa) protein components, whereas the alkali hydrolysis extract contained protein material of <10 kDa. The sulfitolysis, reduction, and ionic liquid extracts contained various protein components between 3.5 and 60 kDa. Keratin obtained from various extraction methods had different yield, morphology, and physicochemical properties. None of the samples were toxic to L929 fibroblast cells up to a concentration of 2.5 mg/mL. Apart from the alkali hydrolysis extract, all other keratin extracts (reduction, sulfitolysis, ionic liquid, and oxidation) showed Fourier transform infrared adsorption peaks attributed to the sulfitolysis–oxidation stretching vibrations of cysteine-S-sulfonated residues, with the oxidation extract showing the highest content of cysteine-S-sulfonated residues. This study indicates that the properties of the keratin extract obtained vary depending on the extraction method used, which has implications for use in structural biomaterial applications.
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Affiliation(s)
- Amin Shavandi
- Department of Food Science, University of Otago, Dunedin, New Zealand
| | | | - Alan Carne
- Department of Biochemistry, University of Otago, Dunedin, New Zealand
| | - Adnan Bekhit
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Alexandria University, Alexandria, Egypt
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17
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Human pluripotent stem cell-derived limbal epithelial stem cells on bioengineered matrices for corneal reconstruction. Exp Eye Res 2015; 146:26-34. [PMID: 26658714 DOI: 10.1016/j.exer.2015.11.021] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2015] [Revised: 10/23/2015] [Accepted: 11/25/2015] [Indexed: 12/13/2022]
Abstract
Corneal epithelium is renewed by limbal epithelial stem cells (LESCs), a type of tissue-specific stem cells located in the limbal palisades of Vogt at the corneo-scleral junction. Acute trauma or inflammatory disorders of the ocular surface can destroy these stem cells, leading to limbal stem cell deficiency (LSCD) - a painful and vision-threatening condition. Treating these disorders is often challenging and complex, especially in bilateral cases with extensive damage. Human pluripotent stem cells (hPSCs) provide new opportunities for corneal reconstruction using cell-based therapy. Here, we investigated the use of hPSC-derived LESC-like cells on bioengineered collagen matrices in serum-free conditions, aiming for clinical applications to reconstruct the corneal epithelium and partially replace the damaged stroma. Differentiation of hPSCs towards LESC-like cells was directed using small-molecule induction followed by maturation in corneal epithelium culture medium. After four to five weeks of culture, differentiated cells were seeded onto bioengineered matrices fabricated as transparent membranes of uniform thickness, using medical-grade porcine collagen type I and a hybrid cross-linking technology. The bioengineered matrices were fully transparent, with high water content and swelling capacity, and parallel lamellar microstructure. Cell proliferation of hPSC-LESCs was significantly higher on bioengineered matrices than on collagen-coated control wells after two weeks of culture, and LESC markers p63 and cytokeratin 15, along with proliferation marker Ki67 were expressed even after 30 days in culture. Overall, hPSC-LESCs retained their capacity to self-renew and proliferate, but were also able to terminally differentiate upon stimulation, as suggested by protein expression of cytokeratins 3 and 12. We propose the use of bioengineered collagen matrices as carriers for the clinically-relevant hPSC-derived LESC-like cells, as a novel tissue engineering approach for corneal reconstruction.
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Ghezzi CE, Rnjak-Kovacina J, Kaplan DL. Corneal tissue engineering: recent advances and future perspectives. TISSUE ENGINEERING PART B-REVIEWS 2015; 21:278-87. [PMID: 25434371 DOI: 10.1089/ten.teb.2014.0397] [Citation(s) in RCA: 116] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
To address the growing need for corneal transplants two main approaches are being pursued: allogenic and synthetic materials. Allogenic tissue from human donors is currently the preferred choice; however, there is a worldwide shortage in donated corneal tissue. In addition, tissue rejection often limits the long-term success of this approach. Alternatively, synthetic homologs to donor corneal grafts are primarily considered temporary replacements until suitable donor tissue becomes available, as they result in a high incidence of graft failure. Tissue engineered cornea analogs would provide effective cornea tissue substitutes and alternatives to address the need to reduce animal testing of commercial products. Recent progress toward these needs is reviewed here, along with future perspectives.
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Affiliation(s)
- Chiara E Ghezzi
- 1Department of Biomedical Engineering, Tufts University, Medford, Massachusetts
| | - Jelena Rnjak-Kovacina
- 1Department of Biomedical Engineering, Tufts University, Medford, Massachusetts.,2Graduate School of Biomedical Engineering, UNSW Australia, Sydney, Australia
| | - David L Kaplan
- 1Department of Biomedical Engineering, Tufts University, Medford, Massachusetts
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Borrelli M, Joepen N, Reichl S, Finis D, Schoppe M, Geerling G, Schrader S. Keratin films for ocular surface reconstruction: Evaluation of biocompatibility in an in-vivo model. Biomaterials 2015; 42:112-20. [DOI: 10.1016/j.biomaterials.2014.11.038] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Revised: 11/13/2014] [Accepted: 11/24/2014] [Indexed: 02/04/2023]
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20
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He H, Yiu SC. Stem cell-based therapy for treating limbal stem cells deficiency: A review of different strategies. Saudi J Ophthalmol 2014; 28:188-94. [PMID: 25278795 DOI: 10.1016/j.sjopt.2014.06.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2014] [Revised: 06/16/2014] [Accepted: 06/16/2014] [Indexed: 12/13/2022] Open
Abstract
The self renewal capability of limbal epithelial stem (LEST) cells is fundamental to the maintenance and healing of corneal epithelium. Limbal stem cell deficiency (LSCD), due to dysfunction or loss of LEST cells, therefore presents as persistent epithelial defects, corneal vascularization, conjunctivalization etc. Stem cell-based therapy, in its simplest form - limbal autograft, has been used successfully for more than a decade. For bilateral LSCD, similar approaches with limbal allografts have been unsuccessful largely due to strong immune rejection. Therefore, as an alternate strategy for treating bilateral LSCD, ex vivo expansion of the remaining LEST cells or autologous stem cells sourced from other potential sites is being explored. Different culture systems (with and without xenobiotic supplements) using substrates like amniotic membrane or fibrin gels have been used successfully for ex vivo LEST cell maintenance and reproduction by imitating the stem cell niche. This paper is organized into sections reviewing the LEST cells, LSCD and various stem cell-based approaches for treating LSCD and discussing future direction and challenges.
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Affiliation(s)
- Hong He
- The Wilmer Eye Institute, School of Medicine, Johns Hopkins University, Baltimore, MD, United States
| | - Samuel C Yiu
- The Wilmer Eye Institute, School of Medicine, Johns Hopkins University, Baltimore, MD, United States
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