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Zhang Y, Zhang C, Chen S, Hu J, Shen L, Yu Y. Research Progress Concerning a Novel Intraocular Lens for the Prevention of Posterior Capsular Opacification. Pharmaceutics 2022; 14:pharmaceutics14071343. [PMID: 35890240 PMCID: PMC9318653 DOI: 10.3390/pharmaceutics14071343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2022] [Revised: 06/12/2022] [Accepted: 06/23/2022] [Indexed: 11/24/2022] Open
Abstract
Posterior capsular opacification (PCO) is the most common complication resulting from cataract surgery and limits the long-term postoperative visual outcome. Using Nd:YAG laser-assisted posterior capsulotomy for the clinical treatment of symptomatic PCO increases the risks of complications, such as glaucoma, retinal diseases, uveitis, and intraocular lens (IOL) pitting. Therefore, finding how to prevent PCO development is the subject of active investigations. As a replacement organ, the IOL is implanted into the lens capsule after cataract surgery, but it is also associated with the occurrence of PCO. Using IOL as a medium for PCO prophylaxis is a more facile and efficient method that has demonstrated various clinical application prospects. Thus, scientists have conducted a lot of research on new intraocular lens fabrication methods, such as optimizing IOL materials and design, and IOL surface modification (including plasma/ultraviolet/ozone treatment, chemical grafting, drug loading, coating modification, and layer-by-layer self-assembly methods). This paper summarizes the research progress for different types of intraocular lenses prepared by different surface modifications, including anti-biofouling IOLs, enhanced-adhesion IOLs, micro-patterned IOLs, photothermal IOLs, photodynamic IOLs, and drug-loading IOLs. These modified intraocular lenses inhibit PCO development by reducing the residual intraoperative lens epithelial cells or by regulating the cellular behavior of lens epithelial cells. In the future, more works are needed to improve the biosecurity and therapeutic efficacy of these modified IOLs.
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Affiliation(s)
- Yidong Zhang
- Eye Center, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310058, China; (Y.Z.); (C.Z.); (S.C.); (J.H.); (L.S.)
| | - Chengshou Zhang
- Eye Center, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310058, China; (Y.Z.); (C.Z.); (S.C.); (J.H.); (L.S.)
| | - Silong Chen
- Eye Center, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310058, China; (Y.Z.); (C.Z.); (S.C.); (J.H.); (L.S.)
| | - Jianghua Hu
- Eye Center, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310058, China; (Y.Z.); (C.Z.); (S.C.); (J.H.); (L.S.)
- Jiande Branch, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310058, China
| | - Lifang Shen
- Eye Center, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310058, China; (Y.Z.); (C.Z.); (S.C.); (J.H.); (L.S.)
| | - Yibo Yu
- Eye Center, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310058, China; (Y.Z.); (C.Z.); (S.C.); (J.H.); (L.S.)
- Correspondence:
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Vrana NE, Gupta S, Mitra K, Rizvanov AA, Solovyeva VV, Antmen E, Salehi M, Ehterami A, Pourchet L, Barthes J, Marquette CA, von Unge M, Wang CY, Lai PL, Bit A. From 3D printing to 3D bioprinting: the material properties of polymeric material and its derived bioink for achieving tissue specific architectures. Cell Tissue Bank 2022; 23:417-440. [PMID: 35000046 DOI: 10.1007/s10561-021-09975-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Accepted: 10/31/2021] [Indexed: 12/22/2022]
Abstract
The application of 3D printing technologies fields for biological tissues, organs, and cells in the context of medical and biotechnology applications requires a significant amount of innovation in a narrow printability range. 3D bioprinting is one such way of addressing critical design challenges in tissue engineering. In a more general sense, 3D printing has become essential in customized implant designing, faithful reproduction of microenvironmental niches, sustainable development of implants, in the capacity to address issues of effective cellular integration, and long-term stability of the cellular constructs in tissue engineering. This review covers various aspects of 3D bioprinting, describes the current state-of-the-art solutions for all aforementioned critical issues, and includes various illustrative representations of technologies supporting the development of phases of 3D bioprinting. It also demonstrates several bio-inks and their properties crucial for being used for 3D printing applications. The review focus on bringing together different examples and current trends in tissue engineering applications, including bone, cartilage, muscles, neuron, skin, esophagus, trachea, tympanic membrane, cornea, blood vessel, immune system, and tumor models utilizing 3D printing technology and to provide an outlook of the future potentials and barriers.
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Affiliation(s)
| | | | - Kunal Mitra
- Florida Institute of Technology, Melbourne, USA
| | | | | | - Ezgi Antmen
- Center of Excellence in Biomaterials and Tissue Engineering, BIOMATEN, Middle East Technical University (METU), Ankara, Turkey
| | - Majid Salehi
- Department of Tissue Engineering, School of Medicine, Shahroud University of Medical Sciences, Shahroud, Iran.,Tissue Engineering and Stem Cells Research Center, Shahroud University of Medical Sciences, Shahroud, Iran
| | - Arian Ehterami
- Department of Mechanical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Lea Pourchet
- UMR 1121, Biomaterials and Bioengineering, INSERM, Strasbourg, France
| | - Julien Barthes
- UMR 1121, Biomaterials and Bioengineering, INSERM, Strasbourg, France
| | | | - Magnus von Unge
- Akershus University Hospital and University of Oslo, Oslo, Norway.,Center for Clinical Research, Uppsala University, Vasteras, Uppsala, Sweden
| | - Chi-Yun Wang
- Department of Orthopedic Surgery, Chang Gung Memorial Hospital, Taoyuan City, Taiwan.,Bone and Joint Research Center, Chang Gung Memorial Hospital, Taoyuan City, Taiwan
| | - Po-Liang Lai
- Department of Orthopedic Surgery, Chang Gung Memorial Hospital, Taoyuan City, Taiwan.,Bone and Joint Research Center, Chang Gung Memorial Hospital, Taoyuan City, Taiwan
| | - Arindam Bit
- National Institute of Technology, Raipur, India.
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Prospects for the application of Müller glia and their derivatives in retinal regenerative therapies. Prog Retin Eye Res 2021; 85:100970. [PMID: 33930561 DOI: 10.1016/j.preteyeres.2021.100970] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 03/28/2021] [Accepted: 03/31/2021] [Indexed: 02/07/2023]
Abstract
Neural cell death is the main feature of all retinal degenerative disorders that lead to blindness. Despite therapeutic advances, progression of retinal disease cannot always be prevented, and once neuronal cell damage occurs, visual loss cannot be reversed. Recent research in the stem cell field, and the identification of Müller glia with stem cell characteristics in the human eye, have provided hope for the use of these cells in retinal therapies to restore vision. Müller glial cells, which are the major structural cells of the retina, play a very important role in retinal homeostasis during health and disease. They are responsible for the spontaneous retinal regeneration observed in zebrafish and lower vertebrates during early postnatal life, and despite the presence of Müller glia with stem cell characteristics in the adult mammalian retina, there is no evidence that they promote regeneration in humans. Like many other stem cells and neurons derived from pluripotent stem cells, Müller glia with stem cell potential do not differentiate into retinal neurons or integrate into the retina when transplanted into the vitreous of experimental animals with retinal degeneration. However, despite their lack of integration, grafted Müller glia have been shown to induce partial restoration of visual function in spontaneous or induced experimental models of photoreceptor or retinal ganglion cell damage. This improvement in visual function observed after Müller cell transplantation has been ascribed to the release of neuroprotective factors that promote the repair and survival of damaged neurons. Due to the development and availability of pluripotent stem cell lines for therapeutic uses, derivation of Müller cells from retinal organoids formed by iPSC and ESC has provided more realistic prospects for the application of these cells to retinal therapies. Several opportunities for research in the regenerative field have also been unlocked in recent years due to a better understanding of the genomic and proteomic profiles of the developing and regenerating retina in zebrafish, providing the basis for further studies of the human retina. In addition, the increased interest on the nature and function of cellular organelle release and the characterization of molecular components of exosomes released by Müller glia, may help us to design new approaches that could be applied to the development of more effective treatments for retinal degenerative diseases.
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Yang GH, Lee J, Kim G. The fabrication of uniaxially aligned micro-textured polycaprolactone struts and application for skeletal muscle tissue regeneration. Biofabrication 2019; 11:025005. [DOI: 10.1088/1758-5090/ab0098] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Thakur A, Mishra S, Pena J, Zhou J, Redenti S, Majeska R, Vazquez M. Collective adhesion and displacement of retinal progenitor cells upon extracellular matrix substrates of transplantable biomaterials. J Tissue Eng 2018; 9:2041731417751286. [PMID: 29344334 PMCID: PMC5764132 DOI: 10.1177/2041731417751286] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Accepted: 12/07/2017] [Indexed: 12/11/2022] Open
Abstract
Strategies to replace retinal photoreceptors lost to damage or disease rely upon the migration of replacement cells transplanted into sub-retinal spaces. A significant obstacle to the advancement of cell transplantation for retinal repair is the limited migration of transplanted cells into host retina. In this work, we examine the adhesion and displacement responses of retinal progenitor cells on extracellular matrix substrates found in retina as well as widely used in the design and preparation of transplantable scaffolds. The data illustrate that retinal progenitor cells exhibit unique adhesive and displacement dynamics in response to poly-l-lysine, fibronectin, laminin, hyaluronic acid, and Matrigel. These findings suggest that transplantable biomaterials can be designed to improve cell integration by incorporating extracellular matrix substrates that affect the migratory behaviors of replacement cells.
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Affiliation(s)
- Ankush Thakur
- Department of Biomedical Engineering, The City College of New York, New York, NY, USA
| | - Shawn Mishra
- Department of Biomedical Engineering, The City College of New York, New York, NY, USA
| | - Juan Pena
- Department of Biomedical Engineering, The City College of New York, New York, NY, USA
| | - Jing Zhou
- Department of Biology, Lehman College, Bronx, NY, USA.,Biology, The Graduate Center, The City University of New York, New York, NY, USA
| | - Stephen Redenti
- Department of Biology, Lehman College, Bronx, NY, USA.,Biology, The Graduate Center, The City University of New York, New York, NY, USA.,Biochemistry, The Graduate Center, The City University of New York, New York, NY, USA
| | - Robert Majeska
- Department of Biomedical Engineering, The City College of New York, New York, NY, USA
| | - Maribel Vazquez
- Department of Biomedical Engineering, The City College of New York, New York, NY, USA.,Biochemistry, The Graduate Center, The City University of New York, New York, NY, USA
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6
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Pennington MR, Ledbetter EC, Van de Walle GR. New Paradigms for the Study of Ocular Alphaherpesvirus Infections: Insights into the Use of Non-Traditional Host Model Systems. Viruses 2017; 9:E349. [PMID: 29156583 PMCID: PMC5707556 DOI: 10.3390/v9110349] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Revised: 11/14/2017] [Accepted: 11/16/2017] [Indexed: 12/22/2022] Open
Abstract
Ocular herpesviruses, most notably human alphaherpesvirus 1 (HSV-1), canid alphaherpesvirus 1 (CHV-1) and felid alphaherpesvirus 1 (FHV-1), infect and cause severe disease that may lead to blindness. CHV-1 and FHV-1 have a pathogenesis and induce clinical disease in their hosts that is similar to HSV-1 ocular infections in humans, suggesting that infection of dogs and cats with CHV-1 and FHV-1, respectively, can be used as a comparative natural host model of herpesvirus-induced ocular disease. In this review, we discuss both strengths and limitations of the various available model systems to study ocular herpesvirus infection, with a focus on the use of these non-traditional virus-natural host models. Recent work has demonstrated the robustness and reproducibility of experimental ocular herpesvirus infections in dogs and cats, and, therefore, these non-traditional models can provide additional insights into the pathogenesis of ocular herpesvirus infections.
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Affiliation(s)
- Matthew R Pennington
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA.
| | - Eric C Ledbetter
- Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA.
| | - Gerlinde R Van de Walle
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA.
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7
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Sorkio A, Haimi S, Verdoold V, Juuti-Uusitalo K, Grijpma D, Skottman H. Poly(trimethylene carbonate) as an elastic biodegradable film for human embryonic stem cell-derived retinal pigment epithelial cells. J Tissue Eng Regen Med 2017; 11:3134-3144. [DOI: 10.1002/term.2221] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Revised: 03/15/2016] [Accepted: 04/19/2016] [Indexed: 12/28/2022]
Affiliation(s)
- Anni Sorkio
- BioMediTech; University of Tampere; Tampere Finland
| | - Suvi Haimi
- BioMediTech; University of Tampere; Tampere Finland
- MIRA Institute for Biomedical Engineering and Technical Medicine and Department of Biomaterials Science and Technology; University of Twente; Enschede The Netherlands
| | - Vincent Verdoold
- MIRA Institute for Biomedical Engineering and Technical Medicine and Department of Biomaterials Science and Technology; University of Twente; Enschede The Netherlands
| | | | - Dirk Grijpma
- MIRA Institute for Biomedical Engineering and Technical Medicine and Department of Biomaterials Science and Technology; University of Twente; Enschede The Netherlands
- Department of Biomedical Engineering; University of Groningen, University Medical Centre Groningen; Groningen The Netherlands
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Fernández-Castillejo S, Formentín P, Catalán Ú, Pallarès J, Marsal LF, Solà R. Silicon microgrooves for contact guidance of human aortic endothelial cells. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2017; 8:675-681. [PMID: 28462069 PMCID: PMC5372752 DOI: 10.3762/bjnano.8.72] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2016] [Accepted: 02/27/2017] [Indexed: 05/09/2023]
Abstract
Background: Micro- and nanoscale substrates have been fabricated in order to study the influence of the topography on the cellular response. The aim of this work was to prepare different collagen-coated silicon substrates displaying grooves and ridges to mimic the aligned and elongated endothelium found in linear vessels, and to use them as substrates to study cell growth and behaviour. Results: The influence of groove-shaped substrates on cell adhesion, morphology and proliferation were assessed, by comparing them to flat silicon substrates, used as control condition. Using human aortic endothelial cells, microscopy images demonstrate that the cellular response is different depending on the silicon surface, when it comes to cell adhesion, morphology (alignment, circularity and filopodia presence) and proliferation. Moreover, these structures exerted no cytotoxic effect. Conclusion: The results suggest that topographical patterning influences cell response. Silicon groove substrates can be used in developing medical devices with microscale features to mimic the endothelium in lineal vessels.
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Affiliation(s)
- Sara Fernández-Castillejo
- Unit of Lipids and Atherosclerosis Research, Department of Medicine and Surgery, Universitat Rovira I Virgili, Sant Llorenç 21, 43201 Reus, Tarragona, Spain
| | - Pilar Formentín
- Nano-electronic and Photonic Systems, Departament d’Enginyeria Electrònica, Elèctrica i Automàtica, Universitat Rovira I Virgili, Països Catalans 26, 43007 Tarragona, Spain
| | - Úrsula Catalán
- Unit of Lipids and Atherosclerosis Research, Department of Medicine and Surgery, Universitat Rovira I Virgili, Sant Llorenç 21, 43201 Reus, Tarragona, Spain
| | - Josep Pallarès
- Nano-electronic and Photonic Systems, Departament d’Enginyeria Electrònica, Elèctrica i Automàtica, Universitat Rovira I Virgili, Països Catalans 26, 43007 Tarragona, Spain
| | - Lluís F Marsal
- Nano-electronic and Photonic Systems, Departament d’Enginyeria Electrònica, Elèctrica i Automàtica, Universitat Rovira I Virgili, Països Catalans 26, 43007 Tarragona, Spain
| | - Rosa Solà
- Unit of Lipids and Atherosclerosis Research, Department of Medicine and Surgery, Universitat Rovira I Virgili, Sant Llorenç 21, 43201 Reus, Tarragona, Spain
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Zalis MC, Johansson S, Johansson F, Johansson UE. Exploration of physical and chemical cues on retinal cell fate. Mol Cell Neurosci 2016; 75:122-32. [DOI: 10.1016/j.mcn.2016.07.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Revised: 06/29/2016] [Accepted: 07/25/2016] [Indexed: 12/28/2022] Open
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10
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Plenderleith RA, Pateman CJ, Rodenburg C, Haycock JW, Claeyssens F, Sammon C, Rimmer S. Arginine-glycine-aspartic acid functional branched semi-interpenetrating hydrogels. SOFT MATTER 2015; 11:7567-7578. [PMID: 26280624 DOI: 10.1039/c5sm00695c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
For the first time a series of functional hydrogels based on semi-interpenetrating networks with both branched and crosslinked polymer components have been prepared and we show the successful use of these materials as substrates for cell culture. The materials consist of highly branched poly(N-isopropyl acrylamide)s with peptide functionalised end groups in a continuous phase of crosslinked poly(vinyl pyrrolidone). Functionalisation of the end groups of the branched polymer component with the GRGDS peptide produces a hydrogel that supports cell adhesion and proliferation. The materials provide a new synthetic functional biomaterial that has many of the features of extracellular matrix, and as such can be used to support tissue regeneration and cell culture. This class of high water content hydrogel material has important advantages over other functional hydrogels in its synthesis and does not require post-processing modifications nor are functional-monomers, which change the polymerisation process, required. Thus, the systems are amenable to large scale and bespoke manufacturing using conventional moulding or additive manufacturing techniques. Processing using additive manufacturing is exemplified by producing tubes using microstereolithography.
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Affiliation(s)
- Richard A Plenderleith
- The Polymer and Biomaterials Chemistry Laboratories, Department of Chemistry, University of Sheffield, Sheffield, South Yorkshire S3 7HF, UK.
| | - Christopher J Pateman
- Department of Materials and Engineering, Kroto Research Institute, University of Sheffield, North Campus, Broad Lane, Sheffield S3 7HQ, UK
| | - Cornelia Rodenburg
- Department of Materials Science and Engineering, University of Sheffield, Mappin Street, Sheffield, S1 3JD, UK
| | - John W Haycock
- Department of Materials and Engineering, Kroto Research Institute, University of Sheffield, North Campus, Broad Lane, Sheffield S3 7HQ, UK
| | - Frederik Claeyssens
- Department of Materials and Engineering, Kroto Research Institute, University of Sheffield, North Campus, Broad Lane, Sheffield S3 7HQ, UK
| | - Chris Sammon
- Materials and Engineering Research Institute, Sheffield Hallam University, Howard Street, Sheffield, South Yorkshire, S1 1WN, UK
| | - Stephen Rimmer
- The Polymer and Biomaterials Chemistry Laboratories, Department of Chemistry, University of Sheffield, Sheffield, South Yorkshire S3 7HF, UK.
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11
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Cheng D, Hou J, Hao L, Cao X, Gao H, Fu X, Wang Y. Bottom-up topography assembly into 3D porous scaffold to mediate cell activities. J Biomed Mater Res B Appl Biomater 2015; 104:1056-63. [DOI: 10.1002/jbm.b.33452] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Revised: 03/22/2015] [Accepted: 05/02/2015] [Indexed: 01/08/2023]
Affiliation(s)
- Delin Cheng
- School of Materials Science and Engineering; South China University of Technology; Guangzhou 510641 China
- National Engineering Research Center for Tissue Restoration and Reconstruction; Guangzhou 510006 China
- Guangdong Province Key Laboratory of Biomedical Engineering; South China University of Technology; Guangzhou 510006 China
| | - Jie Hou
- School of Materials Science and Engineering; South China University of Technology; Guangzhou 510641 China
- National Engineering Research Center for Tissue Restoration and Reconstruction; Guangzhou 510006 China
- Guangdong Province Key Laboratory of Biomedical Engineering; South China University of Technology; Guangzhou 510006 China
| | - Lijing Hao
- School of Materials Science and Engineering; South China University of Technology; Guangzhou 510641 China
- National Engineering Research Center for Tissue Restoration and Reconstruction; Guangzhou 510006 China
- Guangdong Province Key Laboratory of Biomedical Engineering; South China University of Technology; Guangzhou 510006 China
| | - Xiaodong Cao
- School of Materials Science and Engineering; South China University of Technology; Guangzhou 510641 China
- National Engineering Research Center for Tissue Restoration and Reconstruction; Guangzhou 510006 China
- Guangdong Province Key Laboratory of Biomedical Engineering; South China University of Technology; Guangzhou 510006 China
| | - Huichang Gao
- School of Materials Science and Engineering; South China University of Technology; Guangzhou 510641 China
- National Engineering Research Center for Tissue Restoration and Reconstruction; Guangzhou 510006 China
- Guangdong Province Key Laboratory of Biomedical Engineering; South China University of Technology; Guangzhou 510006 China
| | - Xiaoling Fu
- School of Materials Science and Engineering; South China University of Technology; Guangzhou 510641 China
- National Engineering Research Center for Tissue Restoration and Reconstruction; Guangzhou 510006 China
- Guangdong Province Key Laboratory of Biomedical Engineering; South China University of Technology; Guangzhou 510006 China
| | - Yingjun Wang
- School of Materials Science and Engineering; South China University of Technology; Guangzhou 510641 China
- National Engineering Research Center for Tissue Restoration and Reconstruction; Guangzhou 510006 China
- Guangdong Province Key Laboratory of Biomedical Engineering; South China University of Technology; Guangzhou 510006 China
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12
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Magin CM, May RM, Drinker MC, Cuevas KH, Brennan AB, Reddy ST. Micropatterned Protective Membranes Inhibit Lens Epithelial Cell Migration in Posterior Capsule Opacification Model. Transl Vis Sci Technol 2015; 4:9. [PMID: 25883876 DOI: 10.1167/tvst.4.2.9] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Accepted: 02/04/2015] [Indexed: 12/15/2022] Open
Abstract
PURPOSE To evaluate the ability of Sharklet (SK) micropatterns to inhibit lens epithelial cell (LEC) migration. Sharklet Technologies, Inc. (STI) and InSight Innovations, LLC have proposed to develop a Sharklet-patterned protective membrane (PM) to be implanted in combination with a posterior chamber intraocular lens (IOL) to inhibit cellular migration across the posterior capsule, and thereby reduce rates of posterior capsular opacification (PCO). METHODS A variety of STI micropatterns were evaluated versus smooth (SM) controls in a modified scratch wound assay for the ability to reduce or inhibit LEC migration. The best performing topography was selected, translated to a radial design, and applied to PM prototypes. The PM prototypes were tested in an in vitro PCO model for reduction of cell migration behind an IOL versus unpatterned prototypes and IOLs with no PM. In both assays, cell migration was analyzed with fluorescent microscopy. RESULTS All SK micropatterns significantly reduced LEC migration compared with SM controls. Micropatterns that protruded from the surface reduced migration more than recessed features. The best performing micropattern reduced LEC coverage by 80%, P = 0.0001 (ANOVA, Tukey Test). Micropatterned PMs reduced LEC migration in a PCO model by 50%, P = 0.0005 (ANOVA, Tukey Test) compared with both IOLs with no PM and IOLs with SM PMs. CONCLUSIONS Collectively, in vitro results indicate the implantation of micropatterned PMs in combination with posterior chamber IOLs could significantly reduce rates of clinically relevant PCO. This innovative technology is a globally accessible solution to high PCO rates. TRANSLATIONAL RELEVANCE A novel IOL incorporating the SK micropattern in a membrane design surrounding the optic may help increase the success of cataract surgery by reducing secondary cataract, or PCO.
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Affiliation(s)
| | - Rhea M May
- Sharklet Technologies, Inc., Aurora, CO, USA
| | | | - Kevin H Cuevas
- Rocky Mountain Ophthalmology and InSight Innovations, LLC, Golden, CO, USA
| | - Anthony B Brennan
- Sharklet Technologies, Inc., Aurora, CO, USA ; Department of Materials Science & Engineering and J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL, USA
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13
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McHugh KJ, Tao SL, Saint-Geniez M. Porous poly(ε-caprolactone) scaffolds for retinal pigment epithelium transplantation. Invest Ophthalmol Vis Sci 2014; 55:1754-62. [PMID: 24550370 DOI: 10.1167/iovs.13-12833] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
PURPOSE Retinal pigment epithelium (RPE) transplantation is a promising strategy for the treatment of dry age-related macular degeneration (AMD). However, previous attempts at subretinal RPE cell transplantation have experienced limited success due to poor adhesion, organization, and function on aged or diseased Bruch's membrane. Instead, cell-based strategies may benefit from a synthetic scaffold that mimics the functions of healthy Bruch's membrane to promote the formation of a functional RPE monolayer while maintaining metabolite exchange between the vasculature and outer retina. METHODS This study evaluated the behavior of human RPE on nanopatterned porous poly(ε-caprolactone) (PCL) film as a potential scaffold for therapeutic transplantation. Fetal human RPE (fhRPE) was cultured on porous PCL, nonporous PCL, or Costar porous polyester transwells for up to 8 weeks and assessed using light microscopy, fluorescent microscopy, transepithelial resistance, quantitative PCR, ELISAs, and phagocytosis assays. RESULTS fhRPE on porous PCL displayed improved markers of maturity and function compared with both porous polyester transwells and nonporous PCL, including pigmentation, increased cell density, superior barrier function, up-regulation of RPE-specific genes, and polarized growth factor secretion. CONCLUSIONS This study indicates that porous PCL is an attractive scaffold for RPE transplantation. In addition to being biocompatible with the subretinal space, porous PCL also allows for trans-scaffold metabolite transport and significantly improves RPE cell behavior compared to nonporous PCL or porous polyester transwells.
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14
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Enhancement of retinal pigment epithelial culture characteristics and subretinal space tolerance of scaffolds with 200 nm fiber topography. Biomaterials 2014; 35:2837-50. [DOI: 10.1016/j.biomaterials.2013.12.069] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2013] [Accepted: 12/20/2013] [Indexed: 12/21/2022]
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