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Zeng S, Tang Q, Xiao M, Tong X, Yang T, Yin D, Lei L, Li S. Cell membrane-coated nanomaterials for cancer therapy. Mater Today Bio 2023; 20:100633. [PMID: 37128288 PMCID: PMC10148189 DOI: 10.1016/j.mtbio.2023.100633] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 04/01/2023] [Accepted: 04/09/2023] [Indexed: 05/03/2023] Open
Abstract
With the development of nanotechnology, nanoparticles have emerged as a delivery carrier for tumor drug therapy, which can improve the therapeutic effect by increasing the stability and solubility and prolonging the half-life of drugs. However, nanoparticles are foreign substances for humans, are easily cleared by the immune system, are less targeted to tumors, and may even be toxic to the body. As a natural biological material, cell membranes have unique biological properties, such as good biocompatibility, strong targeting ability, the ability to evade immune surveillance, and high drug-carrying capacity. In this article, we review cell membrane-coated nanoparticles (CMNPs) and their applications to tumor therapy. First, we briefly describe CMNP characteristics and applications. Second, we present the characteristics and advantages of different cell membranes as well as nanoparticles, provide a brief description of the process of CMNPs, discuss the current status of their application to tumor therapy, summarize their shortcomings for use in cancer therapy, and propose future research directions. This review summarizes the research progress on CMNPs in cancer therapy in recent years and assesses remaining problems, providing scholars with new ideas for future research on CMNPs in tumor therapy.
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Affiliation(s)
- Shiying Zeng
- Department of Otorhinolaryngology Head and Neck Surgery, The Second Xiangya Hospital, Central South University, Changsha, 410011, China
| | - Qinglai Tang
- Department of Otorhinolaryngology Head and Neck Surgery, The Second Xiangya Hospital, Central South University, Changsha, 410011, China
| | - Minna Xiao
- Department of Otorhinolaryngology Head and Neck Surgery, The Second Xiangya Hospital, Central South University, Changsha, 410011, China
| | - Xinying Tong
- Department of Hemodialysis, The Second Xiangya Hospital, Central South University, Changsha, 410011, China
| | - Tao Yang
- Department of Otorhinolaryngology Head and Neck Surgery, The Second Xiangya Hospital, Central South University, Changsha, 410011, China
| | - Danhui Yin
- Department of Otorhinolaryngology Head and Neck Surgery, The Second Xiangya Hospital, Central South University, Changsha, 410011, China
| | - Lanjie Lei
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, China
- Corresponding author.
| | - Shisheng Li
- Department of Otorhinolaryngology Head and Neck Surgery, The Second Xiangya Hospital, Central South University, Changsha, 410011, China
- Corresponding author.
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2
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Allen BN, Wendland RJ, Thompson JD, Tucker BA, Worthington KS. Photopolymerization Parameters Influence Mechanical, Microstructural, and Cell Loading Properties of Rapidly Fabricated Cell Scaffolds. ACS Biomater Sci Eng 2023; 9:2663-2671. [PMID: 37075323 PMCID: PMC10170473 DOI: 10.1021/acsbiomaterials.3c00408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/21/2023]
Abstract
Engineered scaffolds are commonly used to assist in cellular transplantations, providing crucial support and specific architecture for a variety of tissue engineering applications. Photopolymerization as a fabrication technique for cell scaffolds enables precise spatial and temporal control of properties and structure. One simple technique to achieve a two-dimensional structure is the use of a patterned photomask, which results in regionally selective photo-cross-linking. However, the relationships between photopolymerization parameters like light intensity and exposure time and outcomes like structural fidelity and mechanical properties are not well-established. In this work, we used photopolymerization to generate degradable polycaprolactone triacrylate (PCLTA) scaffolds with a defined microstructure. We examined the impact of light intensity and exposure time on scaffold properties such as shear modulus and micropore structure. To assess feasibility in a specific application and determine the relationship between parameter-driven properties and cell loading, we cultured retinal progenitor cells on the PCLTA scaffolds. We found that light intensity and polymerization time directly impact the scaffold stiffness and micropore structure, which in turn influenced the cell loading capacity of the scaffold. Because material stiffness and topography are known to impact cell viability and fate, understanding the effect of scaffold fabrication parameters on mechanical and structural properties is critical to optimizing cell scaffolds for specific applications.
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Affiliation(s)
- Brittany N Allen
- Roy J. Carver Department of Biomedical Engineering, College of Engineering, The University of Iowa, Iowa City, Iowa 52242-1002, United States
| | - Rion J Wendland
- Roy J. Carver Department of Biomedical Engineering, College of Engineering, The University of Iowa, Iowa City, Iowa 52242-1002, United States
- Department of Ophthalmology and Visual Sciences, Roy J. Carver College of Medicine, Institute for Vision Research, The University of Iowa, Iowa City, Iowa 52242-1002, United States
| | - Jacob D Thompson
- Roy J. Carver Department of Biomedical Engineering, College of Engineering, The University of Iowa, Iowa City, Iowa 52242-1002, United States
| | - Budd A Tucker
- Department of Ophthalmology and Visual Sciences, Roy J. Carver College of Medicine, Institute for Vision Research, The University of Iowa, Iowa City, Iowa 52242-1002, United States
| | - Kristan S Worthington
- Roy J. Carver Department of Biomedical Engineering, College of Engineering, The University of Iowa, Iowa City, Iowa 52242-1002, United States
- Department of Ophthalmology and Visual Sciences, Roy J. Carver College of Medicine, Institute for Vision Research, The University of Iowa, Iowa City, Iowa 52242-1002, United States
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3
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Photoreceptor Cell Replacement Using Pluripotent Stem Cells: Current Knowledge and Remaining Questions. Cold Spring Harb Perspect Med 2023; 13:cshperspect.a041309. [PMID: 36617642 PMCID: PMC9899646 DOI: 10.1101/cshperspect.a041309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Retinal degeneration is an increasing global burden without cure for the majority of patients. Once retinal cells have degenerated, vision is permanently lost. Different strategies have been developed in recent years to prevent retinal degeneration or to restore sight (e.g., gene therapy, cell therapy, and electronic implants). Herein, we present current treatment strategies with a focus on cell therapy for photoreceptor replacement using human pluripotent stem cells. We will describe the state of the art and discuss obstacles and limitations observed in preclinical animal models as well as future directions to improve graft integration and functionality.
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Wang X, Chan V, Corridon PR. Acellular Tissue-Engineered Vascular Grafts from Polymers: Methods, Achievements, Characterization, and Challenges. Polymers (Basel) 2022; 14:polym14224825. [PMID: 36432950 PMCID: PMC9695055 DOI: 10.3390/polym14224825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 11/03/2022] [Accepted: 11/03/2022] [Indexed: 11/11/2022] Open
Abstract
Extensive and permanent damage to the vasculature leading to different pathogenesis calls for developing innovative therapeutics, including drugs, medical devices, and cell therapies. Innovative strategies to engineer bioartificial/biomimetic vessels have been extensively exploited as an effective replacement for vessels that have seriously malfunctioned. However, further studies in polymer chemistry, additive manufacturing, and rapid prototyping are required to generate highly engineered vascular segments that can be effectively integrated into the existing vasculature of patients. One recently developed approach involves designing and fabricating acellular vessel equivalents from novel polymeric materials. This review aims to assess the design criteria, engineering factors, and innovative approaches for the fabrication and characterization of biomimetic macro- and micro-scale vessels. At the same time, the engineering correlation between the physical properties of the polymer and biological functionalities of multiscale acellular vascular segments are thoroughly elucidated. Moreover, several emerging characterization techniques for probing the mechanical properties of tissue-engineered vascular grafts are revealed. Finally, significant challenges to the clinical transformation of the highly promising engineered vessels derived from polymers are identified, and unique perspectives on future research directions are presented.
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Affiliation(s)
- Xinyu Wang
- Department of Biomedical Engineering and Healthcare Engineering Innovation Center, Khalifa University, Abu Dhabi P.O. Box 127788, United Arab Emirates
- Department of Immunology and Physiology, College of Medicine and Health Sciences, Khalifa University, Abu Dhabi P.O. Box 127788, United Arab Emirates
| | - Vincent Chan
- Department of Biomedical Engineering and Healthcare Engineering Innovation Center, Khalifa University, Abu Dhabi P.O. Box 127788, United Arab Emirates
- Correspondence: (V.C.); (P.R.C.)
| | - Peter R. Corridon
- Department of Biomedical Engineering and Healthcare Engineering Innovation Center, Khalifa University, Abu Dhabi P.O. Box 127788, United Arab Emirates
- Department of Immunology and Physiology, College of Medicine and Health Sciences, Khalifa University, Abu Dhabi P.O. Box 127788, United Arab Emirates
- Center for Biotechnology, Khalifa University, Abu Dhabi P.O. Box 127788, United Arab Emirates
- Correspondence: (V.C.); (P.R.C.)
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Ko PL, Wang CK, Hsu HH, Lee TA, Tung YC. Revealing anisotropic elasticity of endothelium under fluid shear stress. Acta Biomater 2022; 145:316-328. [PMID: 35367381 DOI: 10.1016/j.actbio.2022.03.040] [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: 11/16/2021] [Revised: 03/22/2022] [Accepted: 03/24/2022] [Indexed: 11/26/2022]
Abstract
Endothelium lining interior surface of blood vessels experiences various physical stimulations in vivo. Its physical properties, especially elasticity, play important roles in regulating the physiological functions of vascular systems. In this paper, an integrated approach is developed to characterize the anisotropic elasticity of the endothelium under physiological-level fluid shear stress. A pressure sensor-embedded microfluidic device is developed to provide fluid shear stress on the perfusion-cultured endothelium and to measure transverse in-plane elasticities in the directions parallel and perpendicular to the flow direction. Biological atomic force microscopy (Bio-AFM) is further exploited to measure the vertical elasticity of the endothelium in its out-of-plane direction. The results show that the transverse elasticity of the endothelium in the direction parallel to the perfusion culture flow direction is about 70% higher than that in the direction perpendicular to the flow direction. Moreover, the transverse elasticities of the endothelium are estimated to be approximately 120 times larger than the vertical one. The results indicate the effects of fluid shear stress on the transverse elasticity anisotropy of the endothelium, and the difference between the elasticities in transverse and vertical directions. The quantitative measurement of the endothelium anisotropic elasticity in different directions at the tissue level under the fluid shear stress provides biologists insightful information for the advanced vascular system studies from biophysical and biomaterial viewpoints. STATEMENT OF SIGNIFICANCE: In this paper, we take advantage an integrated approach combining microfluidic devices and biological atomic force microscopy (Bio-AFM) to characterize anisotropic elasticities of endothelia with and without fluidic shear stress application. The microfluidic devices are exploited to conduct perfusion cell culture of the endothelial cells, and to estimate the in-plane elasticities of the endothelium in the direction parallel and perpendicular to the shear stress. In addition, the Bio-AFM is utilized for characterization of the endothelium morphology and vertical elasticity. The measurement results demonstrate the very first anisotropic elasticity quantification of the endothelia. Furthermore, the study provides insightful information bridging the microscopic sing cell and macroscopic organ level studies, which can greatly help to advance vascular system research from material perspective.
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Wu A, Lu R, Lee E. Tissue engineering in age-related macular degeneration: a mini-review. J Biol Eng 2022; 16:11. [PMID: 35578246 PMCID: PMC9109377 DOI: 10.1186/s13036-022-00291-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 04/27/2022] [Indexed: 11/10/2022] Open
Abstract
Age-related macular degeneration (AMD) is a progressive, degenerative disease of the macula, leading to severe visual loss in the elderly population. There are two types of AMD: non-exudative ('dry') AMD and exudative ('wet') AMD. Non-exudative AMD is characterized by drusen formation and macular atrophy, while the blood vessels are not leaky. Exudative AMD is a more advanced form of the disease, featured with abnormal blood vessel growth and vascular leakage. Even though anti-angiogenic therapies have been effective in treating wet AMD by normalizing blood vessels, there is no treatment available to prevent or treat dry AMD. Currently, the mechanisms of drusen formation and macular atrophy in the dry AMD are poorly understood, in part because the currently available in vivo models of AMD could not decouple and isolate the complex biological and biophysical factors in the macular region for a detailed mechanism study, including the complement system, angiogenesis factors, extracellular matrix, etc. In the present review article, we describe the biological background of AMD and the key cells and structures in AMD, including retinal epithelium, photoreceptor, Bruch's membrane, and choriocapillaris. We also discuss pre-clinical animal models of AMD and in vivo tissue-engineered approaches, including cell suspension injection and organoid-derived cell sheet transplantation. We also discuss in vitro tissue-engineered models for AMD research. Specifically, we evaluate and compare currently available two- and three-dimensional AMD tissue-engineered models that mimic key anatomical players in AMD progression, including pathophysiological characteristics in Bruch's membrane, photoreceptor, and choriocapillaris. Finally, we discuss the limitation of current AMD models and future directions.
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Affiliation(s)
- Andres Wu
- Nancy E. and Peter C. Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY, 14853, USA
- Ann S. Bowers College of Computing and Information Science, Cornell University, Ithaca, NY, 14853, USA
| | - Renhao Lu
- Nancy E. and Peter C. Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY, 14853, USA
| | - Esak Lee
- Nancy E. and Peter C. Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY, 14853, USA.
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7
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Rizzolo LJ, Nasonkin IO, Adelman RA. OUP accepted manuscript. Stem Cells Transl Med 2022; 11:269-281. [PMID: 35356975 PMCID: PMC8968686 DOI: 10.1093/stcltm/szac001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Accepted: 12/02/2021] [Indexed: 11/12/2022] Open
Abstract
Retinal pigment epithelium (RPE) cells grown on a scaffold, an RPE patch, have potential to ameliorate visual impairment in a limited number of retinal degenerative conditions. This tissue-replacement therapy is suited for age-related macular degeneration (AMD), and related diseases. RPE cells must be transplanted before the disease reaches a point of no return, represented by the loss of photoreceptors. Photoreceptors are specialized, terminally differentiated neurosensory cells that must interact with RPE’s apical processes to be functional. Human photoreceptors are not known to regenerate. On the RPE’s basal side, the RPE transplant must induce the reformation of the choriocapillaris, thereby re-establishing the outer blood-retinal barrier. Because the scaffold is positioned between the RPE and choriocapillaris, it should ideally degrade and be replaced by the natural extracellular matrix that separates these tissues. Besides biodegradable, the scaffolds need to be nontoxic, thin enough to not affect the focal length of the eye, strong enough to survive the transplant procedure, yet flexible enough to conform to the curvature of the retina. The challenge is patients with progressing AMD treasure their remaining vision and fear that a risky surgical procedure will further degrade their vision. Accordingly, clinical trials only treat eyes with severe impairment that have few photoreceptors to interact with the transplanted patch. Although safety has been demonstrated, the cell-replacement mechanism and efficacy remain difficult to validate. This review covers the structure of the retina, the pathology of AMD, the limitations of cell therapy approaches, and the recent progress in developing retinal therapies using biomaterials.
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Affiliation(s)
- Lawrence J Rizzolo
- Department of Ophthalmology and Visual Science, Yale University, New Haven, CT, USA
- Department of Surgery, Yale University, New Haven, CT, USA
- Corresponding author: Lawrence J. Rizzolo, PhD, 24 Long Hill Farm, Guilford, CT 06437, USA. Tel: 203-676-5583;
| | - Igor O Nasonkin
- Phythera Therapeutics LLC, San Leandro, CA, USA
- Igor O. Nasonkin, Phythera Therapeutics, 3021 Teagarden street, San Leandro, CA 92612, USA. Telephone: 510-205-7828;
| | - Ron A Adelman
- Department of Ophthalmology and Visual Science, Yale University, New Haven, CT, USA
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8
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Ramos-Rodriguez DH, MacNeil S, Claeyssens F, Asencio IO. The Use of Microfabrication Techniques for the Design and Manufacture of Artificial Stem Cell Microenvironments for Tissue Regeneration. Bioengineering (Basel) 2021; 8:50. [PMID: 33922428 PMCID: PMC8146165 DOI: 10.3390/bioengineering8050050] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 04/19/2021] [Accepted: 04/21/2021] [Indexed: 12/13/2022] Open
Abstract
The recapitulation of the stem cell microenvironment is an emerging area of research that has grown significantly in the last 10 to 15 years. Being able to understand the underlying mechanisms that relate stem cell behavior to the physical environment in which stem cells reside is currently a challenge that many groups are trying to unravel. Several approaches have attempted to mimic the biological components that constitute the native stem cell niche, however, this is a very intricate environment and, although promising advances have been made recently, it becomes clear that new strategies need to be explored to ensure a better understanding of the stem cell niche behavior. The second strand in stem cell niche research focuses on the use of manufacturing techniques to build simple but functional models; these models aim to mimic the physical features of the niche environment which have also been demonstrated to play a big role in directing cell responses. This second strand has involved a more engineering approach in which a wide set of microfabrication techniques have been explored in detail. This review aims to summarize the use of these microfabrication techniques and how they have approached the challenge of mimicking the native stem cell niche.
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Affiliation(s)
- David H. Ramos-Rodriguez
- Bioengineering and Health Technologies Group, The School of Clinical Dentistry, University of Sheffield, Sheffield S10 2TA, UK;
- Biomaterials and Tissue Engineering Group, Department of Materials Science and Engineering, Kroto Research Institute, University of Sheffield, Sheffield S3 7HQ, UK; (S.M.); (F.C.)
| | - Sheila MacNeil
- Biomaterials and Tissue Engineering Group, Department of Materials Science and Engineering, Kroto Research Institute, University of Sheffield, Sheffield S3 7HQ, UK; (S.M.); (F.C.)
| | - Frederik Claeyssens
- Biomaterials and Tissue Engineering Group, Department of Materials Science and Engineering, Kroto Research Institute, University of Sheffield, Sheffield S3 7HQ, UK; (S.M.); (F.C.)
| | - Ilida Ortega Asencio
- Bioengineering and Health Technologies Group, The School of Clinical Dentistry, University of Sheffield, Sheffield S10 2TA, UK;
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Lee IK, Ludwig AL, Phillips MJ, Lee J, Xie R, Sajdak BS, Jager LD, Gong S, Gamm DM, Ma Z. Ultrathin micromolded 3D scaffolds for high-density photoreceptor layer reconstruction. SCIENCE ADVANCES 2021; 7:eabf0344. [PMID: 33883135 PMCID: PMC8059936 DOI: 10.1126/sciadv.abf0344] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Accepted: 03/04/2021] [Indexed: 05/06/2023]
Abstract
Polymeric scaffolds are revolutionizing therapeutics for blinding disorders affecting the outer retina, a region anatomically and functionally defined by light-sensitive photoreceptors. Recent engineering advances have produced planar scaffolds optimized for retinal pigment epithelium monolayer delivery, which are being tested in early-stage clinical trials. We previously described a three-dimensional scaffold supporting a polarized photoreceptor monolayer, but photoreceptor somata typically occupy multiple densely packed strata to maximize light detection. Thus, patients with severe photoreceptor degeneration are expected to extract greater benefits from higher-density photoreceptor delivery. Here, we describe the microfabrication of a biodegradable scaffold patterned for high-density photoreceptor replacement. The "ice cube tray" structure optimizes mechanical properties and cell-to-biomaterial load, enabling production of a multicellular photoreceptor layer designed for outer retinal reconstruction. Our approach may also be useful in the production of a multitude of micro- and nanoscale structures for multilayered cell delivery in other tissues.
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Affiliation(s)
- In-Kyu Lee
- Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA
- Wisconsin Institute for Discovery, University of Wisconsin-Madison, Madison, WI 53715, USA
| | - Allison L Ludwig
- Department of Comparative Biomedical Sciences, University of Wisconsin-Madison, Madison, WI 53706, USA
- Waisman Center, University of Wisconsin-Madison, Madison, WI 53705, USA
- McPherson Eye Research Institute, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - M Joseph Phillips
- Waisman Center, University of Wisconsin-Madison, Madison, WI 53705, USA
- McPherson Eye Research Institute, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Juhwan Lee
- Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA
- Wisconsin Institute for Discovery, University of Wisconsin-Madison, Madison, WI 53715, USA
| | - Ruosen Xie
- Wisconsin Institute for Discovery, University of Wisconsin-Madison, Madison, WI 53715, USA
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI 53715, USA
| | - Benjamin S Sajdak
- McPherson Eye Research Institute, University of Wisconsin-Madison, Madison, WI 53705, USA
- Morgridge Institute for Research, Madison, WI 53715, USA
| | - Lindsey D Jager
- Waisman Center, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Shaoqin Gong
- Wisconsin Institute for Discovery, University of Wisconsin-Madison, Madison, WI 53715, USA.
- McPherson Eye Research Institute, University of Wisconsin-Madison, Madison, WI 53705, USA
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI 53715, USA
| | - David M Gamm
- Department of Comparative Biomedical Sciences, University of Wisconsin-Madison, Madison, WI 53706, USA.
- Waisman Center, University of Wisconsin-Madison, Madison, WI 53705, USA
- McPherson Eye Research Institute, University of Wisconsin-Madison, Madison, WI 53705, USA
- Department of Ophthalmology and Visual Sciences, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Zhenqiang Ma
- Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA.
- McPherson Eye Research Institute, University of Wisconsin-Madison, Madison, WI 53705, USA
- Department of Materials Science and Engineering, University of Wisconsin- Madison, WI 53706, USA
- Department of Engineering Physics, University of Wisconsin- Madison, WI 53706, USA
- Grainger Institute for Engineering, University of Wisconsin- Madison, WI 53706, USA
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10
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Microfluidic and Microscale Assays to Examine Regenerative Strategies in the Neuro Retina. MICROMACHINES 2020; 11:mi11121089. [PMID: 33316971 PMCID: PMC7763644 DOI: 10.3390/mi11121089] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 12/03/2020] [Accepted: 12/05/2020] [Indexed: 12/15/2022]
Abstract
Bioengineering systems have transformed scientific knowledge of cellular behaviors in the nervous system (NS) and pioneered innovative, regenerative therapies to treat adult neural disorders. Microscale systems with characteristic lengths of single to hundreds of microns have examined the development and specialized behaviors of numerous neuromuscular and neurosensory components of the NS. The visual system is comprised of the eye sensory organ and its connecting pathways to the visual cortex. Significant vision loss arises from dysfunction in the retina, the photosensitive tissue at the eye posterior that achieves phototransduction of light to form images in the brain. Retinal regenerative medicine has embraced microfluidic technologies to manipulate stem-like cells for transplantation therapies, where de/differentiated cells are introduced within adult tissue to replace dysfunctional or damaged neurons. Microfluidic systems coupled with stem cell biology and biomaterials have produced exciting advances to restore vision. The current article reviews contemporary microfluidic technologies and microfluidics-enhanced bioassays, developed to interrogate cellular responses to adult retinal cues. The focus is on applications of microfluidics and microscale assays within mammalian sensory retina, or neuro retina, comprised of five types of retinal neurons (photoreceptors, horizontal, bipolar, amacrine, retinal ganglion) and one neuroglia (Müller), but excludes the non-sensory, retinal pigmented epithelium.
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11
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Chemla Y, Avraham ES, Markus A, Teblum E, Slotky A, Kostikov Y, Farah N, Telkhozhayeva M, Shoval I, Nessim GD, Mandel Y. Carbon nanostructures as a scaffold for human embryonic stem cell differentiation toward photoreceptor precursors. NANOSCALE 2020; 12:18918-18930. [PMID: 32910131 DOI: 10.1039/d0nr02256j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Carbon nanomaterials have been introduced as a scaffold for various biological applications due to their unique physical and electrical properties. Here we studied carbon nanotubes (CNTs) and carbon nanofibers (CNFs) as scaffold materials for the differentiation of human embryonic stem cells (hESCs) towards photoreceptor precursor cells (PRPs). We report on their cytoxicity, their effect on cell morphology, cell-surface interface and the differentiation process. To this end, hESCs were differentiated into PRPs on carbon nanofibers (CNFs), long horizontal CNTs (LHCNTs), vertically aligned CNTs (VACNTs) or glass (control) surfaces. The differentiated cells were investigated by immunohistochemistry, fluorescence imaging and electron microscopy. Our results revealed that the investigated nanomaterials were not cytotoxic to the cells during the differentiation process. The surface interface effect on the cells was apparent, affecting cell directionality, migration and morphology. Interestingly, cell fate was not dependent on the substrate type, as inferred from the similar dynamics of the loss of pluripotency and the comparable expression levels of the photoreceptor marker Crx for all investigated substrates. These results are important for better understanding the effect of nanomaterial surface interaction with differentiating neural cells in general, and for future use of these materials as scaffolds for differentiating photoreceptors for vision restoration in particular.
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Affiliation(s)
- Yoav Chemla
- Faculty of Life Sciences, School of Optometry and Vision Science, Bar Ilan University, Ramat Gan, 5290002, Israel.
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Singh RK, Nasonkin IO. Limitations and Promise of Retinal Tissue From Human Pluripotent Stem Cells for Developing Therapies of Blindness. Front Cell Neurosci 2020; 14:179. [PMID: 33132839 PMCID: PMC7513806 DOI: 10.3389/fncel.2020.00179] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Accepted: 05/25/2020] [Indexed: 12/13/2022] Open
Abstract
The self-formation of retinal tissue from pluripotent stem cells generated a tremendous promise for developing new therapies of retinal degenerative diseases, which previously seemed unattainable. Together with use of induced pluripotent stem cells or/and CRISPR-based recombineering the retinal organoid technology provided an avenue for developing models of human retinal degenerative diseases "in a dish" for studying the pathology, delineating the mechanisms and also establishing a platform for large-scale drug screening. At the same time, retinal organoids, highly resembling developing human fetal retinal tissue, are viewed as source of multipotential retinal progenitors, young photoreceptors and just the whole retinal tissue, which may be transplanted into the subretinal space with a goal of replacing patient's degenerated retina with a new retinal "patch." Both approaches (transplantation and modeling/drug screening) were projected when Yoshiki Sasai demonstrated the feasibility of deriving mammalian retinal tissue from pluripotent stem cells, and generated a lot of excitement. With further work and testing of both approaches in vitro and in vivo, a major implicit limitation has become apparent pretty quickly: the absence of the uniform layer of Retinal Pigment Epithelium (RPE) cells, which is normally present in mammalian retina, surrounds photoreceptor layer and develops and matures first. The RPE layer polarize into apical and basal sides during development and establish microvilli on the apical side, interacting with photoreceptors, nurturing photoreceptor outer segments and participating in the visual cycle by recycling 11-trans retinal (bleached pigment) back to 11-cis retinal. Retinal organoids, however, either do not have RPE layer or carry patches of RPE mostly on one side, thus directly exposing most photoreceptors in the developing organoids to neural medium. Recreation of the critical retinal niche between the apical RPE and photoreceptors, where many retinal disease mechanisms originate, is so far unattainable, imposes clear limitations on both modeling/drug screening and transplantation approaches and is a focus of investigation in many labs. Here we dissect different retinal degenerative diseases and analyze how and where retinal organoid technology can contribute the most to developing therapies even with a current limitation and absence of long and functional outer segments, supported by RPE.
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13
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Zhang S, Markey M, Pena CD, Venkatesh T, Vazquez M. A Micro-Optic Stalk (μOS) System to Model the Collective Migration of Retinal Neuroblasts. MICROMACHINES 2020; 11:mi11040363. [PMID: 32244321 PMCID: PMC7230939 DOI: 10.3390/mi11040363] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 03/27/2020] [Accepted: 03/28/2020] [Indexed: 12/18/2022]
Abstract
Contemporary regenerative therapies have introduced stem-like cells to replace damaged neurons in the visual system by recapitulating critical processes of eye development. The collective migration of neural stem cells is fundamental to retinogenesis and has been exceptionally well-studied using the fruit fly model of Drosophila Melanogaster. However, the migratory behavior of its retinal neuroblasts (RNBs) has been surprisingly understudied, despite being critical to retinal development in this invertebrate model. The current project developed a new microfluidic system to examine the collective migration of RNBs extracted from the developing visual system of Drosophila as a model for the collective motile processes of replacement neural stem cells. The system scales with the microstructure of the Drosophila optic stalk, which is a pre-cursor to the optic nerve, to produce signaling fields spatially comparable to in vivo RNB stimuli. Experiments used the micro-optic stalk system, or μOS, to demonstrate the preferred sizing and directional migration of collective, motile RNB groups in response to changes in exogenous concentrations of fibroblast growth factor (FGF), which is a key factor in development. Our data highlight the importance of cell-to-cell contacts in enabling cell cohesion during collective RNB migration and point to the unexplored synergy of invertebrate cell study and microfluidic platforms to advance regenerative strategies.
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Affiliation(s)
- Stephanie Zhang
- Department of Biomedical Engineering, Binghamton University, 4400 Vestal Pkwy E, Binghamton, NY 13902, USA;
| | - Miles Markey
- Department of Biomedical Engineering, Rutgers University, 599 Taylor Rd, Piscataway, NJ 08854, USA;
| | - Caroline D. Pena
- Department of Biomedical Engineering, City College of New York, New York City, NY 10031, USA;
| | - Tadmiri Venkatesh
- Department of Biology, City College of New York, New York City, NY 10031, USA;
| | - Maribel Vazquez
- Department of Biomedical Engineering, Rutgers University, 599 Taylor Rd, Piscataway, NJ 08854, USA;
- Correspondence:
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14
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Murphy AR, Truong YB, O'Brien CM, Glattauer V. Bio-inspired human in vitro outer retinal models: Bruch's membrane and its cellular interactions. Acta Biomater 2020; 104:1-16. [PMID: 31945506 DOI: 10.1016/j.actbio.2020.01.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Revised: 01/07/2020] [Accepted: 01/09/2020] [Indexed: 12/17/2022]
Abstract
Retinal degenerative disorders, such as age-related macular degeneration (AMD), are one of the leading causes of blindness worldwide, however, treatments to completely stop the progression of these debilitating conditions are non-existent. Researchers require sophisticated models that can accurately represent the native structure of human retinal tissue to study these disorders. Current in vitro models used to study the retina are limited in their ability to fully recapitulate the structure and function of the retina, Bruch's membrane and the underlying choroid. Recent developments in the field of induced pluripotent stem cell technology has demonstrated the capability of retinal pigment epithelial cells to recapitulate AMD-like pathology. However, such studies utilise unsophisticated, bio-inert membranes to act as Bruch's membrane and support iPSC-derived retinal cells. This review presents a concise summary of the properties and function of the Bruch's membrane-retinal pigment epithelium complex, the initial pathogenic site of AMD as well as the current status for materials and fabrication approaches used to generate in vitro models of this complex tissue. Finally, this review explores required advances in the field of in vitro retinal modelling. STATEMENT OF SIGNIFICANCE: Retinal degenerative disorders such as age-related macular degeneration are worldwide leading causes of blindness. Previous attempts to model the Bruch's membrane-retinal pigment epithelial complex, the initial pathogenic site of age-related macular degeneration, have lacked the sophistication to elucidate valuable insights into disease mechanisms. Here we provide a detailed account of the morphological, physical and chemical properties of Bruch's membrane which may aid the fabrication of more sophisticated and physiologically accurate in vitro models of the retina, as well as various fabrication techniques to recreate this structure. This review also further highlights some recent advances in some additional challenging aspects of retinal tissue modelling including integrated fluid flow and photoreceptor alignment.
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Affiliation(s)
- Ashley R Murphy
- CSIRO Manufacturing, Research Way, Clayton, VIC 3168, Australia.
| | - Yen B Truong
- CSIRO Manufacturing, Research Way, Clayton, VIC 3168, Australia
| | - Carmel M O'Brien
- CSIRO Manufacturing, Research Way, Clayton, VIC 3168, Australia; Australian Regenerative Medicine Institute, Science, Technology, Research and Innovation Precinct (STRIP), Monash University, Clayton Campus, Wellington Road, Clayton, VIC 3800, Australia
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15
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Gandhi JK, Mano F, Iezzi R, LoBue SA, Holman BH, Fautsch MP, Olsen TW, Pulido JS, Marmorstein AD. Fibrin hydrogels are safe, degradable scaffolds for sub-retinal implantation. PLoS One 2020; 15:e0227641. [PMID: 31929571 PMCID: PMC6957177 DOI: 10.1371/journal.pone.0227641] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Accepted: 12/23/2019] [Indexed: 01/26/2023] Open
Abstract
Retinal pigment epithelium (RPE) transplantation for the treatment of macular degeneration has been studied for over 30 years. Human clinical trials have demonstrated that RPE monolayers exhibit improved cellular engraftment and survival compared to single cell suspensions. The use of a scaffold facilitates implantation of a flat, wrinkle-free, precisely placed monolayer. Scaffolds currently being investigated in human clinical trials are non-degradable which results in the introduction of a chronic foreign body. To improve RPE transplant technology, a degradable scaffold would be desirable. Using human fibrin, we have generated scaffolds that support the growth of an RPE monolayer in vitro. To determine whether these scaffolds are degraded in vivo, we developed a surgical approach that delivers a fibrin hydrogel implant to the sub-retinal space of the pig eye and determined whether and how fast they degraded. Using standard ophthalmic imaging techniques, the fibrin scaffolds were completely degraded by postoperative week 8 in 5 of 6 animals. Postmortem histologic analysis confirmed the absence of the scaffold from the subretinal space at 8 weeks, and demonstrated the reattachment of the neurosensory retina and a normal RPE–photoreceptor interface. When mechanical debridement of a region of native RPE was performed during implantation surgery degradation was accelerated and scaffolds were undetectable by 4 weeks. These data represent the first in situ demonstration of a fully biodegradable scaffold for use in the implantation of RPE and other cell types for treatment of macular degeneration and other retinal degenerative diseases.
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Affiliation(s)
- Jarel K. Gandhi
- Department of Ophthalmology, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Fukutaro Mano
- Department of Ophthalmology, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Raymond Iezzi
- Department of Ophthalmology, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Stephen A. LoBue
- Department of Ophthalmology, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Brad H. Holman
- Department of Ophthalmology, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Michael P. Fautsch
- Department of Ophthalmology, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Timothy W. Olsen
- Department of Ophthalmology, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Jose S. Pulido
- Department of Ophthalmology, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Alan D. Marmorstein
- Department of Ophthalmology, Mayo Clinic, Rochester, Minnesota, United States of America
- * E-mail:
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16
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Fields MA, Del Priore LV, Adelman RA, Rizzolo LJ. Interactions of the choroid, Bruch's membrane, retinal pigment epithelium, and neurosensory retina collaborate to form the outer blood-retinal-barrier. Prog Retin Eye Res 2019; 76:100803. [PMID: 31704339 DOI: 10.1016/j.preteyeres.2019.100803] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2019] [Revised: 10/26/2019] [Accepted: 10/28/2019] [Indexed: 01/10/2023]
Abstract
The three interacting components of the outer blood-retinal barrier are the retinal pigment epithelium (RPE), choriocapillaris, and Bruch's membrane, the extracellular matrix that lies between them. Although previously reviewed independently, this review integrates these components into a more wholistic view of the barrier and discusses reconstitution models to explore the interactions among them. After updating our understanding of each component's contribution to barrier function, we discuss recent efforts to examine how the components interact. Recent studies demonstrate that claudin-19 regulates multiple aspects of RPE's barrier function and identifies a barrier function whereby mutations of claudin-19 affect retinal development. Co-culture approaches to reconstitute components of the outer blood-retinal barrier are beginning to reveal two-way interactions between the RPE and choriocapillaris. These interactions affect barrier function and the composition of the intervening Bruch's membrane. Normal or disease models of Bruch's membrane, reconstituted with healthy or diseased RPE, demonstrate adverse effects of diseased matrix on RPE metabolism. A stumbling block for reconstitution studies is the substrates typically used to culture cells are inadequate substitutes for Bruch's membrane. Together with human stem cells, the alternative substrates that have been designed offer an opportunity to engineer second-generation culture models of the outer blood-retinal barrier.
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Affiliation(s)
- Mark A Fields
- Department of Ophthalmology and Visual Science, Yale University School of Medicine, PO Box 208061, New Haven, CT, 06520-8061, USA
| | - Lucian V Del Priore
- Department of Ophthalmology and Visual Science, Yale University School of Medicine, PO Box 208061, New Haven, CT, 06520-8061, USA
| | - Ron A Adelman
- Department of Ophthalmology and Visual Science, Yale University School of Medicine, PO Box 208061, New Haven, CT, 06520-8061, USA
| | - Lawrence J Rizzolo
- Department of Ophthalmology and Visual Science, Yale University School of Medicine, PO Box 208061, New Haven, CT, 06520-8061, USA; Department of Surgery, Yale University School of Medicine, PO Box 208062, New Haven, CT, 06520-8062, USA.
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17
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Chi PY, Spuul P, Tseng FG, Genot E, Chou CF, Taloni A. Cell Migration in Microfluidic Devices: Invadosomes Formation in Confined Environments. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1146:79-103. [PMID: 31612455 DOI: 10.1007/978-3-030-17593-1_6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The last 20 years have seen the blooming of microfluidics technologies applied to biological sciences. Microfluidics provides effective tools for biological analysis, allowing the experimentalists to extend their playground to single cells and single molecules, with high throughput and resolution which were inconceivable few decades ago. In particular, microfluidic devices are profoundly changing the conventional way of studying the cell motility and cell migratory dynamics. In this chapter we will furnish a comprehensive view of the advancements made in the research domain of confinement-induced cell migration, thanks to the use of microfluidic devices. The chapter is subdivided in three parts. Each section will be addressing one of the fundamental questions that the microfluidic technology is contributing to unravel: (i) where cell migration takes place, (ii) why cells migrate and, (iii) how the cells migrate. The first introductory part is devoted to a thumbnail, and partially historical, description of microfluidics and its impact in biological sciences. Stress will be put on two aspects of the devices fabrication process, which are crucial for biological applications: materials used and coating methods. The second paragraph concerns the cell migration induced by environmental cues: chemical, leading to chemotaxis, mechanical, at the basis of mechanotaxis, and electrical, which induces electrotaxis. Each of them will be addressed separately, highlighting the fundamental role of microfluidics in providing the well-controlled experimental conditions where cell migration can be induced, investigated and ultimately understood. The third part of the chapter is entirely dedicated to how the cells move in confined environments. Invadosomes (the joint name for podosomes and invadopodia) are cell protrusion that contribute actively to cell migration or invasion. The formation of invadosomes under confinement is a research topic that only recently has caught the attention of the scientific community: microfluidic design is helping shaping the future direction of this emerging field of research.
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Affiliation(s)
- Pei-Yin Chi
- Department of Engineering and System Science, National Tsing Hua University, Hsinchu, Taiwan, Republic of China.,Nano Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Taipei, Taiwan, Republic of China.,Institute of Physics, Academia Sinica, Taipei, Taiwan, Republic of China
| | - Pirjo Spuul
- Department of Chemistry and Biotechnology, Division of Gene Technology, Tallinn University of Technology, Tallinn, Estonia
| | - Fan-Gang Tseng
- Department of Engineering and System Science, National Tsing Hua University, Hsinchu, Taiwan, Republic of China.,Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu, Taiwan, Republic of China.,Research Center for Applied Sciences, Academia Sinica, Taipei, Taiwan, Republic of China
| | - Elisabeth Genot
- Centre de Recherche Cardio-Thoracique de Bordeaux (INSERM U1045), Université de Bordeaux, Bordeaux, France.
| | - Chia-Fu Chou
- Institute of Physics, Academia Sinica, Taipei, Taiwan, Republic of China. .,Research Center for Applied Sciences, Academia Sinica, Taipei, Taiwan, Republic of China. .,Genomics Research Center and Research Center for Applied Sciences, Academia Sinica, Taipei, Taiwan, Republic of China.
| | - Alessandro Taloni
- Institute for Complex Systems, Consiglio Nazionale delle Ricerche, Roma, Italy.
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18
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Abstract
The retina is a very fine and layered neural tissue, which vitally depends on the preservation of cells, structure, connectivity and vasculature to maintain vision. There is an urgent need to find technical and biological solutions to major challenges associated with functional replacement of retinal cells. The major unmet challenges include generating sufficient numbers of specific cell types, achieving functional integration of transplanted cells, especially photoreceptors, and surgical delivery of retinal cells or tissue without triggering immune responses, inflammation and/or remodeling. The advances of regenerative medicine enabled generation of three-dimensional tissues (organoids), partially recreating the anatomical structure, biological complexity and physiology of several tissues, which are important targets for stem cell replacement therapies. Derivation of retinal tissue in a dish creates new opportunities for cell replacement therapies of blindness and addresses the need to preserve retinal architecture to restore vision. Retinal cell therapies aimed at preserving and improving vision have achieved many improvements in the past ten years. Retinal organoid technologies provide a number of solutions to technical and biological challenges associated with functional replacement of retinal cells to achieve long-term vision restoration. Our review summarizes the progress in cell therapies of retina, with focus on human pluripotent stem cell-derived retinal tissue, and critically evaluates the potential of retinal organoid approaches to solve a major unmet clinical need—retinal repair and vision restoration in conditions caused by retinal degeneration and traumatic ocular injuries. We also analyze obstacles in commercialization of retinal organoid technology for clinical application.
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19
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Hunt NC, Hallam D, Chichagova V, Steel DH, Lako M. The Application of Biomaterials to Tissue Engineering Neural Retina and Retinal Pigment Epithelium. Adv Healthc Mater 2018; 7:e1800226. [PMID: 30175520 DOI: 10.1002/adhm.201800226] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Revised: 06/16/2018] [Indexed: 12/21/2022]
Abstract
The prevalence of degenerative retinal disease is ever increasing as life expectancy rises globally. The human retina fails to regenerate and the use of human embryonic stem cells (hESCs) and human-induced pluripotent stem cells (hiPSCs) to engineer retinal tissue is of particular interest due to the limited availability of suitable allogeneic or autologous tissue. Retinal tissue and its development are well characterized, which have resulted in robust assays to assess the development of tissue-engineered retina. Retinal tissue can be generated in vitro from hESCs and hiPSCs without biomaterial scaffolds, but despite advancements, protocols remain slow, expensive, and fail to result in mature functional tissue. Several recent studies have demonstrated the potential of biomaterial scaffolds to enhance generation of hESC/hiPSC-derived retinal tissue, including synthetic polymers, silk, alginate, hyaluronic acid, and extracellular matrix molecules. This review outlines the advances that have been made toward tissue-engineered neural retina and retinal pigment epithelium (RPE) for clinical application in recent years, including the success of clinical trials involving transplantation of cells and tissue to promote retinal repair; and the evidence from in vitro and animal studies that biomaterials can enhance development and integration of retinal tissue.
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Affiliation(s)
- Nicola C. Hunt
- Newcastle UniversityInstitute of Genetic MedicineInternational Centre for Life Central Parkway Newcastle NE1 3BZ UK
| | - Dean Hallam
- Newcastle UniversityInstitute of Genetic MedicineInternational Centre for Life Central Parkway Newcastle NE1 3BZ UK
| | - Valeria Chichagova
- Newcastle UniversityInstitute of Genetic MedicineInternational Centre for Life Central Parkway Newcastle NE1 3BZ UK
- Biomedicine WestInternational Centre for LifeTimes SquareNewcastle upon Tyne NE1 4EP UK
| | - David H. Steel
- Newcastle UniversityInstitute of Genetic MedicineInternational Centre for Life Central Parkway Newcastle NE1 3BZ UK
| | - Majlinda Lako
- Newcastle UniversityInstitute of Genetic MedicineInternational Centre for Life Central Parkway Newcastle NE1 3BZ UK
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20
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Khalili S, Ballios BG, Belair-Hickey J, Donaldson L, Liu J, Coles BLK, Grisé KN, Baakdhah T, Bader GD, Wallace VA, Bernier G, Shoichet MS, van der Kooy D. Induction of rod versus cone photoreceptor-specific progenitors from retinal precursor cells. Stem Cell Res 2018; 33:215-227. [PMID: 30453152 DOI: 10.1016/j.scr.2018.11.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 10/16/2018] [Accepted: 11/12/2018] [Indexed: 10/27/2022] Open
Abstract
During development, multipotent progenitors undergo temporally-restricted differentiation into post-mitotic retinal cells; however, the mechanisms of progenitor division that occurs during retinogenesis remain controversial. Using clonal analyses (lineage tracing and single cell cultures), we identify rod versus cone lineage-specific progenitors derived from both adult retinal stem cells and embryonic neural retinal precursors. Taurine and retinoic acid are shown to act in an instructive and lineage-restricted manner early in the progenitor lineage hierarchy to produce rod-restricted progenitors from stem cell progeny. We also identify an instructive, but lineage-independent, mechanism for the specification of cone-restricted progenitors through the suppression of multiple differentiation signaling pathways. These data indicate that exogenous signals play critical roles in directing lineage decisions and resulting in fate-restricted rod or cone photoreceptor progenitors in culture. Additional factors may be involved in governing photoreceptor fates in vivo.
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Affiliation(s)
- Saeed Khalili
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Brian G Ballios
- Department of Ophthalmology and Vision Sciences, University of Toronto, 340 College Street, Suite 400, Toronto, Ontario M5T 3A9, Canada
| | - Justin Belair-Hickey
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Laura Donaldson
- Division of Ophthalmology, Department of Surgery, Faculty of Health Sciences, McMaster University, 2757 King Street East, Hamilton, Ontario L8G 4X3, Canada
| | - Jeff Liu
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Brenda L K Coles
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Kenneth N Grisé
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Tahani Baakdhah
- Institute of Medical Science, University of Toronto, 1 King's College Circle, Toronto, Ontario M5S 1A8, Canada
| | - Gary D Bader
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Valerie A Wallace
- Department of Ophthalmology and Vision Sciences, University of Toronto, 340 College Street, Suite 400, Toronto, Ontario M5T 3A9, Canada; Donald K Johnson Eye Institute, Krembil Research Institute, University Health Network, 60 Leonard Ave., Rm 8KD413, Toronto, Ontario M5T 2S8, Canada
| | - Gilbert Bernier
- Stem Cell and Developmental Biology Laboratory, Hôpital Maisonneuve-Rosemont, 5415 Boul. l'Assomption, Montréal H1T 2M4, Canada; Faculté de Médecine, Départment de Neurosciences, Université de Montréal, Montréal H3T 1J4, Canada
| | - Molly S Shoichet
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, Ontario M5S 3E5, Canada
| | - Derek van der Kooy
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario M5S 1A8, Canada.
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21
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Jung YH, Phillips MJ, Lee J, Xie R, Ludwig AL, Chen G, Zheng Q, Kim TJ, Zhang H, Barney P, Min J, Barlow K, Gong S, Gamm DM, Ma Z. 3D Microstructured Scaffolds to Support Photoreceptor Polarization and Maturation. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1803550. [PMID: 30109736 DOI: 10.1002/adma.201803550] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 07/11/2018] [Indexed: 06/08/2023]
Abstract
Blinding disorders of the outer retina involve dysfunction and degeneration of photoreceptors. One potential approach to treat these forms of blindness is to repopulate the outer retina via a simple bolus injection of donor photoreceptors. However, this may not be ideal due to the highly polarized organization of photoreceptors that include apical light sensing photopigments and basal axon terminals. Furthermore, bolus injections create uncertainty with regard to the area, density, and retention of donor cells. Here, a novel and robust microfabrication process is developed to create 3D, micrometer-sized complex structures in ultrathin and biocompatible elastomer films (nonbiodegradable polydimethylsiloxane and biodegradable poly(glycerol-sebacate)) that can serve as polarizable photoreceptor delivery scaffolds, consisting of an array of cup-shaped photoreceptor capture wells that funnel into a microchannel. This "wine glass" scaffold design promotes efficient capture of human pluripotent stem-cell-derived photoreceptor cell bodies and guidance of basal axon extensions, ultimately achieving a uniform level of organization and polarization that is not possible with bolus injections or previously described scaffolds. In addition to future therapeutic applications, our scaffold design and materials provide a platform to generate reproducible and scalable in vitro models of photoreceptor-based diseases.
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Affiliation(s)
- Yei Hwan Jung
- Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, WI, 53706, USA
- Wisconsin Institute for Discovery, University of Wisconsin-Madison, Madison, WI, 53715, USA
| | - M Joseph Phillips
- Waisman Center, University of Wisconsin-Madison, Madison, WI, 53705, USA
- McPherson Eye Research Institute, University of Wisconsin-Madison, Madison, WI, 53705, USA
| | - Juhwan Lee
- Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, WI, 53706, USA
- Wisconsin Institute for Discovery, University of Wisconsin-Madison, Madison, WI, 53715, USA
| | - Ruosen Xie
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI, 53715, USA
- Wisconsin Institute for Discovery, University of Wisconsin-Madison, Madison, WI, 53715, USA
| | - Allison L Ludwig
- Waisman Center, University of Wisconsin-Madison, Madison, WI, 53705, USA
| | - Guojun Chen
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI, 53715, USA
- Wisconsin Institute for Discovery, University of Wisconsin-Madison, Madison, WI, 53715, USA
| | - Qifeng Zheng
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI, 53715, USA
- Wisconsin Institute for Discovery, University of Wisconsin-Madison, Madison, WI, 53715, USA
| | - Tong June Kim
- Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Huilong Zhang
- Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Patrick Barney
- Waisman Center, University of Wisconsin-Madison, Madison, WI, 53705, USA
| | - Jee Min
- Waisman Center, University of Wisconsin-Madison, Madison, WI, 53705, USA
| | - Katherine Barlow
- Waisman Center, University of Wisconsin-Madison, Madison, WI, 53705, USA
| | - Shaoqin Gong
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI, 53715, USA
- Wisconsin Institute for Discovery, University of Wisconsin-Madison, Madison, WI, 53715, USA
| | - David M Gamm
- Waisman Center, University of Wisconsin-Madison, Madison, WI, 53705, USA
- McPherson Eye Research Institute, University of Wisconsin-Madison, Madison, WI, 53705, USA
- Department of Ophthalmology and Visual Sciences, University of Wisconsin-Madison, Madison, WI, 53705, USA
| | - Zhenqiang Ma
- Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, WI, 53706, USA
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22
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Oswald J, Baranov P. Regenerative medicine in the retina: from stem cells to cell replacement therapy. Ther Adv Ophthalmol 2018; 10:2515841418774433. [PMID: 29998222 PMCID: PMC6016968 DOI: 10.1177/2515841418774433] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Accepted: 02/15/2018] [Indexed: 12/20/2022] Open
Abstract
Following the fast pace of the growing field of stem cell research, retinal cell replacement is finally emerging as a feasible mean to be explored for clinical application. Although neuroprotective treatments are able to slow the progression of retinal degeneration caused by diseases such as age-related macular degeneration and glaucoma, they are insufficient to fully halt disease progression and unable to recover previously lost vision. Comprehensive, technological and intellectual advances over the past years, including the in vitro differentiation of retinal cells at manufacturing scale from embryonic stem (ES) cell and induced pluripotent stem (iPS) cell cultures, progress within the area of retinal disease modeling, and the first clinical trials have started to shape the way towards addressing this treatment gap and translating retinal cell replacement to the clinic. Here, summarize the most recent advances within retinal cell replacement from both a scientific and clinical perspective, and discuss the remaining challenges towards the delivery of the first retinal cell products.
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Affiliation(s)
- Julia Oswald
- Department of Ophthalmology, Harvard Medical School, Schepens Eye Research Institute, Massachusetts Eye and Ear, 20 Staniford Street, Boston, MA 02114, USA
| | - Petr Baranov
- Department of Ophthalmology, Harvard Medical School, Schepens Eye Research Institute, Massachusetts Eye and Ear, Boston, MA, USA
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23
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An In Vitro Model for the Ocular Surface and Tear Film System. Sci Rep 2017; 7:6163. [PMID: 28733649 PMCID: PMC5522434 DOI: 10.1038/s41598-017-06369-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Accepted: 06/12/2017] [Indexed: 02/05/2023] Open
Abstract
Dry eye is a complicated ocular surface disease whose exact pathogenesis is not yet fully understood. For the therapeutic evaluation and pathogenesis study of dry eye, we established an in vitro three-dimensional (3D) coculture model for the ocular surface. It is composed of rabbit conjunctival epithelium and lacrimal gland cell spheroids, and recapitulates the aqueous and mucin layers of the tear film. We first investigated the culture conditions for both cell types to optimize their secretory functions, by employing goblet cell enrichment, air-lifting culture, and 3D spheroid formation techniques. The coculture of the two cell components leads to elevated secretion and higher expression of tear secretory markers. We also compared several coculture systems, and found that direct cell contact between the two cell types significantly increased tear secretion. Inflammation was induced to mimic dry eye disease in the coculture model system. Our results showed that the coculture system provides a more physiologically relevant therapeutic response compared to monocultures. Our work provides a complex 3D model as a recapitulation of the ocular surface and tear film system, which can be further developed as a model for dry eye disease and therapeutic evaluation.
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24
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Compartmentalized Microfluidic Platforms: The Unrivaled Breakthrough of In Vitro Tools for Neurobiological Research. J Neurosci 2017; 36:11573-11584. [PMID: 27852766 DOI: 10.1523/jneurosci.1748-16.2016] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Revised: 09/08/2016] [Accepted: 09/28/2016] [Indexed: 12/15/2022] Open
Abstract
Microfluidic technology has become a valuable tool to the scientific community, allowing researchers to study fine cellular mechanisms with higher variable control compared with conventional systems. It has evolved tremendously, and its applicability and flexibility made its usage grow exponentially and transversely to several research fields. This has been particularly noticeable in neuroscience research, where microfluidic platforms made it possible to address specific questions extending from axonal guidance, synapse formation, or axonal transport to the development of 3D models of the CNS to allow pharmacological testing and drug screening. Furthermore, the continuous upgrade of microfluidic platforms has allowed a deeper study of the communication occurring between different neuronal and glial cells or between neurons and other peripheral tissues, both in physiological and pathological conditions. Importantly, the evolution of microfluidic technology has always been accompanied by the development of new computational tools addressing data acquisition, analysis, and modeling.
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Li K, Zhong X, Yang S, Luo Z, Li K, Liu Y, Cai S, Gu H, Lu S, Zhang H, Wei Y, Zhuang J, Zhuo Y, Fan Z, Ge J. HiPSC-derived retinal ganglion cells grow dendritic arbors and functional axons on a tissue-engineered scaffold. Acta Biomater 2017; 54:117-127. [PMID: 28216299 DOI: 10.1016/j.actbio.2017.02.032] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Revised: 02/08/2017] [Accepted: 02/15/2017] [Indexed: 12/21/2022]
Abstract
Numerous therapeutic procedures in modern medical research rely on the use of tissue engineering for the treatment of retinal diseases. However, the cell source and the transplantation method are still a limitation. Previously, it was reported that a self-organizing three-dimensional neural retina can be induced from human-induced pluripotent stem cells (hiPSCs). In this study, we disclose the generation of retinal ganglion cells (RGCs) from the neural retina and their seeding on a biodegradable poly (lactic-co-glycolic acid) (PLGA) scaffold to create an engineered RGC-scaffold biomaterial. Moreover, we explored the dendritic arbor, branching point, functional axon and action potential of the biomaterial. Finally, the cell-scaffold was transplanted into the intraocular environment of rabbits and rhesus monkeys. STATEMENT OF SIGNIFICANCE As a part of the mammalian central nervous system (CNS), the retinal ganglion cell (RGC) shows little regenerative capacity. With the use of medical biomaterial for cells seeding and deliver, a new domain is now emerging that uses tissue engineering therapy for retinal disease. However, previous studies utilized RGCs from rodent model, which has limitations for human disease treatment. In the present study, we generated RGCs from hiPSCs-3D neural retina and then seeded these RGCs on PLGA scaffold to create an engineered RGC-scaffold biomaterial. Moreover, we assessed the transplantation method for biomaterial in vivo. Our study provides a technique to produce the engineered human RGC-scaffold biomaterial.
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Affiliation(s)
- Kangjun Li
- State Key Laboratory of Ophthalmology, Key Lab of Ophthalmology and Visual Science, Zhongshan Ophthalmic Center, Sun Yet-Sen University, Guangzhou, Guangdong, China
| | - Xiufeng Zhong
- State Key Laboratory of Ophthalmology, Key Lab of Ophthalmology and Visual Science, Zhongshan Ophthalmic Center, Sun Yet-Sen University, Guangzhou, Guangdong, China
| | - Sijing Yang
- State Key Laboratory of Ophthalmology, Key Lab of Ophthalmology and Visual Science, Zhongshan Ophthalmic Center, Sun Yet-Sen University, Guangzhou, Guangdong, China
| | - Ziming Luo
- State Key Laboratory of Ophthalmology, Key Lab of Ophthalmology and Visual Science, Zhongshan Ophthalmic Center, Sun Yet-Sen University, Guangzhou, Guangdong, China
| | - Kang Li
- State Key Laboratory of Ophthalmology, Key Lab of Ophthalmology and Visual Science, Zhongshan Ophthalmic Center, Sun Yet-Sen University, Guangzhou, Guangdong, China
| | - Ying Liu
- State Key Laboratory of Ophthalmology, Key Lab of Ophthalmology and Visual Science, Zhongshan Ophthalmic Center, Sun Yet-Sen University, Guangzhou, Guangdong, China
| | - Song Cai
- Department of Anatomy and Neurobiology, Zhongshan School of Medicine, Yet-Sen University, Guangzhou, Guangdong, China
| | - Huaiyu Gu
- Department of Anatomy and Neurobiology, Zhongshan School of Medicine, Yet-Sen University, Guangzhou, Guangdong, China
| | - Shoutao Lu
- Bai Duoan Medical Equipment Company, Qihe, Shandong, China
| | - Haijun Zhang
- Bai Duoan Medical Equipment Company, Qihe, Shandong, China
| | - Yantao Wei
- State Key Laboratory of Ophthalmology, Key Lab of Ophthalmology and Visual Science, Zhongshan Ophthalmic Center, Sun Yet-Sen University, Guangzhou, Guangdong, China
| | - Jing Zhuang
- State Key Laboratory of Ophthalmology, Key Lab of Ophthalmology and Visual Science, Zhongshan Ophthalmic Center, Sun Yet-Sen University, Guangzhou, Guangdong, China
| | - Yehong Zhuo
- State Key Laboratory of Ophthalmology, Key Lab of Ophthalmology and Visual Science, Zhongshan Ophthalmic Center, Sun Yet-Sen University, Guangzhou, Guangdong, China
| | - Zhigang Fan
- State Key Laboratory of Ophthalmology, Key Lab of Ophthalmology and Visual Science, Zhongshan Ophthalmic Center, Sun Yet-Sen University, Guangzhou, Guangdong, China
| | - Jian Ge
- State Key Laboratory of Ophthalmology, Key Lab of Ophthalmology and Visual Science, Zhongshan Ophthalmic Center, Sun Yet-Sen University, Guangzhou, Guangdong, China.
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Higuchi A, Suresh Kumar S, Ling QD, Alarfaj AA, Munusamy MA, Murugan K, Hsu ST, Benelli G, Umezawa A. Polymeric design of cell culture materials that guide the differentiation of human pluripotent stem cells. Prog Polym Sci 2017. [DOI: 10.1016/j.progpolymsci.2016.09.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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27
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Ni N, Ji J, Chen S, Zhang D, Wang Z, Shen B, Guo C, Zhang Y, Wang S, Fan X, You Z, Luo M, Gu P. Poly(1,3-propylene sebacate) and Poly(sebacoyl diglyceride): A Pair of Potential Polymers for the Proliferation and Differentiation of Retinal Progenitor Cells. Macromol Biosci 2016; 16:1334-47. [PMID: 27275951 DOI: 10.1002/mabi.201600058] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Revised: 04/16/2016] [Indexed: 01/09/2023]
Affiliation(s)
- Ni Ni
- Department of Ophthalmology; Shanghai Ninth People's Hospital; School of Medicine; Shanghai Jiaotong University; Shanghai 200011 China
| | - Jing Ji
- Department of Ophthalmology; Shanghai Ninth People's Hospital; School of Medicine; Shanghai Jiaotong University; Shanghai 200011 China
| | - Shuo Chen
- State Key Laboratory for Modification of Chemical Fibersand Polymer Materials; College of Materials Science and Engineering; Donghua University; 2999 North Renmin Road Shanghai 201620 China
| | - Dandan Zhang
- Department of Ophthalmology; Shanghai Ninth People's Hospital; School of Medicine; Shanghai Jiaotong University; Shanghai 200011 China
| | - Zi Wang
- Department of Ophthalmology; Shanghai Ninth People's Hospital; School of Medicine; Shanghai Jiaotong University; Shanghai 200011 China
| | - Bingqiao Shen
- Department of Ophthalmology; Shanghai Ninth People's Hospital; School of Medicine; Shanghai Jiaotong University; Shanghai 200011 China
| | - Chunyu Guo
- Department of Ophthalmology; Shanghai Ninth People's Hospital; School of Medicine; Shanghai Jiaotong University; Shanghai 200011 China
| | - Yi Zhang
- Department of Ophthalmology; Shanghai Ninth People's Hospital; School of Medicine; Shanghai Jiaotong University; Shanghai 200011 China
| | - Shaofei Wang
- State Key Laboratory for Modification of Chemical Fibersand Polymer Materials; College of Materials Science and Engineering; Donghua University; 2999 North Renmin Road Shanghai 201620 China
| | - Xianqun Fan
- Department of Ophthalmology; Shanghai Ninth People's Hospital; School of Medicine; Shanghai Jiaotong University; Shanghai 200011 China
| | - Zhengwei You
- State Key Laboratory for Modification of Chemical Fibersand Polymer Materials; College of Materials Science and Engineering; Donghua University; 2999 North Renmin Road Shanghai 201620 China
| | - Min Luo
- Department of Ophthalmology; Shanghai Ninth People's Hospital; School of Medicine; Shanghai Jiaotong University; Shanghai 200011 China
| | - Ping Gu
- Department of Ophthalmology; Shanghai Ninth People's Hospital; School of Medicine; Shanghai Jiaotong University; Shanghai 200011 China
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Song MJ, Bharti K. Looking into the future: Using induced pluripotent stem cells to build two and three dimensional ocular tissue for cell therapy and disease modeling. Brain Res 2016; 1638:2-14. [PMID: 26706569 PMCID: PMC4837038 DOI: 10.1016/j.brainres.2015.12.011] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Revised: 11/24/2015] [Accepted: 12/08/2015] [Indexed: 01/02/2023]
Abstract
Retinal degenerative diseases are the leading cause of irreversible vision loss in developed countries. In many cases the diseases originate in the homeostatic unit in the back of the eye that contains the retina, retinal pigment epithelium (RPE) and the choriocapillaris. RPE is a central and a critical component of this homeostatic unit, maintaining photoreceptor function and survival on the apical side and choriocapillaris health on the basal side. In diseases like age-related macular degeneration (AMD), it is thought that RPE dysfunctions cause disease-initiating events and as the RPE degenerates photoreceptors begin to die and patients start loosing vision. Patient-specific induced pluripotent stem (iPS) cell-derived RPE provides direct access to a patient's genetics and allow the possibility of identifying the initiating events of RPE-associated degenerative diseases. Furthermore, iPS cell-derived RPE cells are being tested as a potential cell replacement in disease stages with RPE atrophy. In this article we summarize the recent progress in the field of iPS cell-derived RPE "disease modeling" and cell therapies and also discuss the possibilities of developing a model of the entire homeostatic unit to aid in studying disease processes in the future. This article is part of a Special Issue entitled SI: PSC and the brain.
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Affiliation(s)
- Min Jae Song
- Unit on Ocular and Stem Cell Translational Research National Eye Institute, 10 Center Drive, Room 10B10, Bethesda, MD 20892, United States
| | - Kapil Bharti
- Unit on Ocular and Stem Cell Translational Research National Eye Institute, 10 Center Drive, Room 10B10, Bethesda, MD 20892, United States.
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Reactive gliosis in the adult zebrafish retina. Exp Eye Res 2015; 143:98-109. [PMID: 26492821 DOI: 10.1016/j.exer.2015.09.017] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Revised: 09/02/2015] [Accepted: 09/28/2015] [Indexed: 01/10/2023]
Abstract
In contrast to mammals, zebrafish posses the remarkable ability to regenerate retinal neurons. Damage to the zebrafish retina induces Müller glia to act as stem cells, generating retinal progenitors for regeneration. In contrast, injury in the mammalian retina results in Müller glial reactive gliosis, a characteristic gliotic response that is normally detrimental to vision. Understanding the signaling pathways that determine how Müller glia respond to injury is a critical step toward promoting regeneration in the mammalian retina. Here we report that zebrafish Müller glia exhibit signs of reactive gliosis even under normal regenerative conditions and that cell cycle inhibition increases this response. Persistently reactive Müller glia increase their neuroprotective functions, temporarily saving photoreceptors from a cytotoxic light lesion. However, the absence of a sustained proliferation response results in a significant inhibition of retinal regeneration. Interestingly, when cell cycle inhibition is released, a partial recovery of regeneration is observed. Together, these data demonstrate that zebrafish Müller glia possess both gliotic and regenerative potential.
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Liu J, Zheng H, Poh PSP, Machens HG, Schilling AF. Hydrogels for Engineering of Perfusable Vascular Networks. Int J Mol Sci 2015; 16:15997-6016. [PMID: 26184185 PMCID: PMC4519935 DOI: 10.3390/ijms160715997] [Citation(s) in RCA: 158] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Revised: 06/09/2015] [Accepted: 07/07/2015] [Indexed: 02/03/2023] Open
Abstract
Hydrogels are commonly used biomaterials for tissue engineering. With their high-water content, good biocompatibility and biodegradability they resemble the natural extracellular environment and have been widely used as scaffolds for 3D cell culture and studies of cell biology. The possible size of such hydrogel constructs with embedded cells is limited by the cellular demand for oxygen and nutrients. For the fabrication of large and complex tissue constructs, vascular structures become necessary within the hydrogels to supply the encapsulated cells. In this review, we discuss the types of hydrogels that are currently used for the fabrication of constructs with embedded vascular networks, the key properties of hydrogels needed for this purpose and current techniques to engineer perfusable vascular structures into these hydrogels. We then discuss directions for future research aimed at engineering of vascularized tissue for implantation.
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Affiliation(s)
- Juan Liu
- Department of Plastic Surgery and Hand Surgery, Klinikum Rechts der Isar, Technische Universität München, D-81675 Munich, Germany.
- Department of Hand Surgery, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China.
| | - Huaiyuan Zheng
- Department of Plastic Surgery and Hand Surgery, Klinikum Rechts der Isar, Technische Universität München, D-81675 Munich, Germany.
- Department of Hand Surgery, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China.
| | - Patrina S P Poh
- Department of Plastic Surgery and Hand Surgery, Klinikum Rechts der Isar, Technische Universität München, D-81675 Munich, Germany.
| | - Hans-Günther Machens
- Department of Plastic Surgery and Hand Surgery, Klinikum Rechts der Isar, Technische Universität München, D-81675 Munich, Germany.
| | - Arndt F Schilling
- Department of Plastic Surgery and Hand Surgery, Klinikum Rechts der Isar, Technische Universität München, D-81675 Munich, Germany.
- Center for Applied Tissue Engineering and Regenerative Medicine (CANTER), Munich University of Applied Science, D-80335 Munich, Germany.
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Dhamodaran K, Subramani M, Ponnalagu M, Shetty R, Das D. Ocular stem cells: a status update! Stem Cell Res Ther 2015; 5:56. [PMID: 25158127 PMCID: PMC4055087 DOI: 10.1186/scrt445] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2013] [Accepted: 04/14/2014] [Indexed: 12/13/2022] Open
Abstract
Stem cells are unspecialized cells that have been a major focus of the field of regenerative medicine, opening new frontiers and regarded as the future of medicine. The ophthalmology branch of the medical sciences was the first to directly benefit from stem cells for regenerative treatment. The success stories of regenerative medicine in ophthalmology can be attributed to its accessibility, ease of follow-up and the eye being an immune-privileged organ. Cell-based therapies using stem cells from the ciliary body, iris and sclera are still in animal experimental stages but show potential for replacing degenerated photoreceptors. Limbal, corneal and conjunctival stem cells are still limited for use only for surface reconstruction, although they might have potential beyond this. Iris pigment epithelial, ciliary body epithelial and choroidal epithelial stem cells in laboratory studies have shown some promise for retinal or neural tissue replacement. Trabecular meshwork, orbital and sclera stem cells have properties identical to cells of mesenchymal origin but their potential has yet to be experimentally determined and validated. Retinal and retinal pigment epithelium stem cells remain the most sought out stem cells for curing retinal degenerative disorders, although treatments using them have resulted in variable outcomes. The functional aspects of the therapeutic application of lenticular stem cells are not known and need further attention. Recently, embryonic stem cell-derived retinal pigment epithelium has been used for treating patients with Stargardts disease and age-related macular degeneration. Overall, the different stem cells residing in different components of the eye have shown some success in clinical and animal studies in the field of regenerative medicine.
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32
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Baran ET, Pirraco RP, Cerqueira MT, Marques AP, Retolaza A, Merino S, Neves NM, Reis RL. Depth (Z-axis) control of cell morphologies on micropatterned surfaces. J BIOACT COMPAT POL 2015. [DOI: 10.1177/0883911515580354] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
In this study, cell responses on micropatterned films that were changing in groove–ridge widths and pattern depth were investigated to compare the degree of size effects from X–Y and Z planes. Poly(caprolactone) films with five different groove–ridge sizes and three pattern depths were prepared by hot embossing technique. In general, the morphologies of osteoblast cell were not changed noticeably by the size changes in groove–ridges with the same depth size. However, cell morphologies were changed significantly when pattern depths were increased from 1.35 to 4.95 µm. Also, the cell morphology change between different groove–ridges was significant when the pattern depth was small (1.35 µm), and these effects were diminished or masked when the pattern depth was increased to 4.95 µm. Linear regression analysis further clarifies that unit size changes in depth may affect cell length and orientation rates 2.4 and 4 times, respectively, in comparison to rates obtained from X–Y planes.
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Affiliation(s)
- Erkan T Baran
- 3B’s Research Group—Biomaterials, Biodegradable and Biomimetic, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Guimarães, Portugal
- ICVS/3B’s PT Government Associated Laboratory, Guimarães, Portugal
| | - Rogerio P Pirraco
- 3B’s Research Group—Biomaterials, Biodegradable and Biomimetic, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Guimarães, Portugal
- ICVS/3B’s PT Government Associated Laboratory, Guimarães, Portugal
| | - Mariana T Cerqueira
- 3B’s Research Group—Biomaterials, Biodegradable and Biomimetic, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Guimarães, Portugal
- ICVS/3B’s PT Government Associated Laboratory, Guimarães, Portugal
| | - Alaxandre P Marques
- 3B’s Research Group—Biomaterials, Biodegradable and Biomimetic, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Guimarães, Portugal
- ICVS/3B’s PT Government Associated Laboratory, Guimarães, Portugal
| | - Aritz Retolaza
- Micro and Nanofabrication Unit, IK4-Tekniker, Eibar, Spain
- CIC microGUNE, Arrasate-Mondragón, Spain
| | - Santos Merino
- Micro and Nanofabrication Unit, IK4-Tekniker, Eibar, Spain
- CIC microGUNE, Arrasate-Mondragón, Spain
| | - Nuno M Neves
- 3B’s Research Group—Biomaterials, Biodegradable and Biomimetic, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Guimarães, Portugal
- ICVS/3B’s PT Government Associated Laboratory, Guimarães, Portugal
| | - Rui L Reis
- 3B’s Research Group—Biomaterials, Biodegradable and Biomimetic, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Guimarães, Portugal
- ICVS/3B’s PT Government Associated Laboratory, Guimarães, Portugal
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Green DI, Ou Y. Towards the development of a human glaucoma disease-in-a-dish model using stem cells. EXPERT REVIEW OF OPHTHALMOLOGY 2015. [DOI: 10.1586/17469899.2015.1026329] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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34
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Prevention of postoperative tendon adhesion by biodegradable electrospun membrane of poly(lactide-co-glycolide). CHINESE JOURNAL OF POLYMER SCIENCE 2015. [DOI: 10.1007/s10118-015-1611-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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35
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Higuchi A, Ling QD, Kumar SS, Chang Y, Alarfaj AA, Munusamy MA, Murugan K, Hsu ST, Umezawa A. Physical cues of cell culture materials lead the direction of differentiation lineages of pluripotent stem cells. J Mater Chem B 2015; 3:8032-8058. [DOI: 10.1039/c5tb01276g] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Differentiation methods of hPSCs into specific cell lineages. Differentiation of hPSCsviaEB formation (types AB, A–D) or without EB formation (types E–H).
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Affiliation(s)
- Akon Higuchi
- Department of Chemical and Materials Engineering, National Central University
- Taoyuan 32001
- Taiwan
- National Research Institute for Child Health and Development
- Center for Regenerative Medicine
| | - Qing-Dong Ling
- Cathay Medical Research Institute
- Cathay General Hospital
- Taipei
- Taiwan
- Graduate Institute of Systems Biology and Bioinformatics
| | - S. Suresh Kumar
- Department of Medical Microbiology and Parasitology
- Universiti Putra Malaysia
- Selangor
- Malaysia
| | - Yung Chang
- Department of Chemical Engineering
- R&D Center for Membrane Technology
- Chung Yuan Christian University
- Taoyuan
- Taiwan
| | - Abdullah A. Alarfaj
- Department of Botany and Microbiology
- College of Science
- King Saud University
- Riyadh
- Saudi Arabia
| | - Murugan A. Munusamy
- Department of Botany and Microbiology
- College of Science
- King Saud University
- Riyadh
- Saudi Arabia
| | - Kadarkarai Murugan
- Division of Entomology
- Department of Zoology
- School of Life Sciences
- Bharathiar University
- Coimbatore 641046
| | - Shih-Tien Hsu
- Department of Internal Medicine
- Taiwan Landseed Hospital
- Taoyuan
- Taiwan
| | - Akihiro Umezawa
- National Research Institute for Child Health and Development
- Center for Regenerative Medicine
- Tokyo 157-8535
- Japan
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Kong X, Wang J, Cao L, Yu Y, Liu C. Enhanced osteogenesis of bone morphology protein-2 in 2- N ,6- O -sulfated chitosan immobilized PLGA scaffolds. Colloids Surf B Biointerfaces 2014; 122:359-367. [DOI: 10.1016/j.colsurfb.2014.07.012] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2014] [Revised: 06/23/2014] [Accepted: 07/10/2014] [Indexed: 11/24/2022]
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Current treatment limitations in age-related macular degeneration and future approaches based on cell therapy and tissue engineering. J Ophthalmol 2014; 2014:510285. [PMID: 24672707 PMCID: PMC3941782 DOI: 10.1155/2014/510285] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Accepted: 12/10/2013] [Indexed: 01/01/2023] Open
Abstract
Age-related macular degeneration (AMD) is the leading cause of blindness in the Western world. With an ageing population, it is anticipated that the number of AMD cases will increase dramatically, making a solution to this debilitating disease an urgent requirement for the socioeconomic future of the European Union and worldwide. The present paper reviews the limitations of the current therapies as well as the socioeconomic impact of the AMD. There is currently no cure available for AMD, and even palliative treatments are rare. Treatment options show several side effects, are of high cost, and only treat the consequence, not the cause of the pathology. For that reason, many options involving cell therapy mainly based on retinal and iris pigment epithelium cells as well as stem cells are being tested. Moreover, tissue engineering strategies to design and manufacture scaffolds to mimic Bruch's membrane are very diverse and under investigation. Both alternative therapies are aimed to prevent and/or cure AMD and are reviewed herein.
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38
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Kador KE, Goldberg JL. Scaffolds and stem cells: delivery of cell transplants for retinal degenerations. EXPERT REVIEW OF OPHTHALMOLOGY 2014; 7:459-470. [PMID: 23585772 DOI: 10.1586/eop.12.56] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Retinal degenerations and optic neuropathies often lead to death of photoreceptors or retinal ganglion cells, respectively. Stem cell therapies are showing promise for these diseases in preclinical models and are beginning to transition into human trials, but cell delivery and integration remain major challenges. Focusing on photoreceptor- and progenitor-directed approaches, in this article, the authors review how advances in tissue engineering and cell scaffold design are enhancing cell therapies for retinal degeneration.
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Affiliation(s)
- Karl E Kador
- Bascom Palmer Eye Institute and Interdisciplinary Stem Cell Institute, University of Miami Miller School of Medicine, Miami, 1501 NW 10th Avenue, BRB 826, FL 33136, USA
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39
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Gamm DM, Phillips MJ, Singh R. Modeling retinal degenerative diseases with human iPS-derived cells: current status and future implications. EXPERT REVIEW OF OPHTHALMOLOGY 2014; 8:213-216. [PMID: 24039627 DOI: 10.1586/eop.13.14] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- David M Gamm
- Department of Ophthalmology and Visual Sciences, McPherson Eye Research Institute, Waisman Center Stem Cell Research Program, University of Wisconsin School of Medicine and Public Health, Waisman Center, Room T609, 1500 Highland Ave, Madison, WI 53705, USA
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40
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Kamei KI. Cutting-Edge Microfabricated Biomedical Tools for Human Pluripotent Stem Cell Research. ACTA ACUST UNITED AC 2013; 18:469-81. [DOI: 10.1177/2211068213495394] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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41
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McHugh KJ, Saint-Geniez M, Tao SL. Topographical control of ocular cell types for tissue engineering. J Biomed Mater Res B Appl Biomater 2013; 101:1571-84. [PMID: 23744715 PMCID: PMC4090092 DOI: 10.1002/jbm.b.32968] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2012] [Revised: 03/19/2013] [Accepted: 04/21/2013] [Indexed: 02/06/2023]
Abstract
Visual impairment affects over 285 million people worldwide and has a major impact on an individual's quality of life. Tissue engineering has the potential to increase the quality of life for many of these patients by preventing vision loss or restoring vision using cell-based therapies. However, these strategies will require an understanding of the microenvironmental factors that influence cell behavior. The eye is a well-organized organ whose structural complexity is essential for proper function. Interactions between ocular cells and their highly ordered extracellular matrix are necessary for maintaining key tissue properties including corneal transparency and retinal lamination. Therefore, it is not surprising that culturing these cells in vitro on traditional flat substrates result in irregular morphology. Instead, topographically patterned biomaterials better mimic native extracellular matrix and have been shown to elicit in vivo-like morphology and gene expression which is essential for tissue engineering. Herein we review multiple methods for producing well-controlled topography and discuss optimal biomaterial scaffold design for cells of the cornea, retina, and lens.
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Affiliation(s)
- Kevin J. McHugh
- The Charles Stark Draper Laboratory, Cambridge, MA
- Schepens Eye Research Institute, Boston, MA
- Department of Biomedical Engineering, Boston University, Boston, MA
| | - Magali Saint-Geniez
- Schepens Eye Research Institute, Boston, MA
- Department of Ophthalmology, Harvard Medical School, Boston, MA
| | - Sarah L. Tao
- The Charles Stark Draper Laboratory, Cambridge, MA
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42
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Borooah S, Phillips M, Bilican B, Wright A, Wilmut I, Chandran S, Gamm D, Dhillon B. Using human induced pluripotent stem cells to treat retinal disease. Prog Retin Eye Res 2013; 37:163-81. [PMID: 24104210 PMCID: PMC3841575 DOI: 10.1016/j.preteyeres.2013.09.002] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Revised: 09/06/2013] [Accepted: 09/16/2013] [Indexed: 02/08/2023]
Abstract
The eye is an ideal target for exploiting the potential of human induced pluripotent stem cell (hiPSC) technology in order to understand disease pathways and explore novel therapeutic strategies for inherited retinal disease. The aim of this article is to map the pathway from state-of-the art laboratory-based discoveries to realising the translational potential of this emerging technique. We describe the relevance and routes to establishing hiPSCs in selected models of human retinal disease. Additionally, we define pathways for applying hiPSC technology in treating currently incurable, progressive and blinding retinal disease.
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Affiliation(s)
- S. Borooah
- MRC Centre for Regenerative Medicine, University of Edinburgh, Edinburgh EH16 4UU, UK
- Ophthalmology, School of Clinical Sciences, University of Edinburgh, Edinburgh EH16 4SB, UK
| | - M.J. Phillips
- Waisman Center, University of Wisconsin School of Medicine and Public Health, 1500 Highland Ave, Madison, WI 53705, USA
| | - B. Bilican
- MRC Centre for Regenerative Medicine, University of Edinburgh, Edinburgh EH16 4UU, UK
| | - A.F. Wright
- MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh EH4 2XU, UK
| | - I. Wilmut
- MRC Centre for Regenerative Medicine, University of Edinburgh, Edinburgh EH16 4UU, UK
| | - S. Chandran
- MRC Centre for Regenerative Medicine, University of Edinburgh, Edinburgh EH16 4UU, UK
| | - D. Gamm
- Waisman Center, University of Wisconsin School of Medicine and Public Health, 1500 Highland Ave, Madison, WI 53705, USA
- Department of Ophthalmology and Visual Sciences, McPherson Eye Research Institute, University of Wisconsin School of Medicine and Public Health, 1500 Highland Ave, Madison, WI 53705, USA
| | - B. Dhillon
- Ophthalmology, School of Clinical Sciences, University of Edinburgh, Edinburgh EH16 4SB, UK
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43
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Yun JM, Ganesan R, Choi JH, Kim JB. Local pH-responsive diazoketo-functionalized photoresist for multicomponent protein patterning. ACS APPLIED MATERIALS & INTERFACES 2013; 5:10253-10259. [PMID: 24053579 DOI: 10.1021/am403053x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Selective surface immobilization of multiple biomolecule components, under mild conditions where they do not denature, is attractive for applications in biosensors and biotechnology. Here, we report on a biocompatible and pH-responsive photoresist containing diazoketo-functionalized methacrylate, methacrylic acid, and poly(ethylene glycol) methacrylate monomers, where the photolithographic process may be carried out in a local pH range to minimize biomolecular denaturation. The polymer is insoluble or sparsely soluble in pH 6.4 or more acidic solution or deionized water, but soluble in a basic solution, pH 7.9 or more. After UV exposure, however, carboxylic acid groups are generated by Wolff rearrangement and photodissociation of the diazoketo groups in the polymer chain, leading to dissolution of UV-exposed polymer at pH 6.4. Using the property of the pH-solubility switching, we demonstrate dual streptavidin patterning using only biological buffers, pH 6.4 and 7.9 solutions, and double exposure patterning to confirm the sustainability of the diazoketo groups in unexposed regions despite carrying out several wet processes.
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Affiliation(s)
- Je Moon Yun
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST) , Yuseong-gu, Daejeon 305-701, Korea
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44
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Kamei KI, Hirai Y, Tabata O. Body on a Chip: Re-Creation of a Living System In Vitro. IEEE NANOTECHNOLOGY MAGAZINE 2013. [DOI: 10.1109/mnano.2013.2275024] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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45
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Blenkinsop TA, Corneo B, Temple S, Stern JH. Ophthalmologic stem cell transplantation therapies. Regen Med 2013; 7:32-9. [PMID: 23210809 DOI: 10.2217/rme.12.77] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Vision loss is a major social issue, with more than 20 million people over the age of 18 years affected in the USA alone. Loss of vision is feared more than premature death or cardiovascular disease, according to a recent Society for Consumer Research group survey. The annual direct cost of medical care for the most prevalent eye disease, age-related macular degeneration, was estimated at US$255 billion in 2010 with an additional economic impact of US$88 billion due to lost productivity and the burden of family and community care for visual disability. With the blossoming of human stem cell research, regenerative treatments are now being developed that can help reduce this burden. Positive results from animal studies demonstrate that stem cell-based transplants can preserve and potentially improve vision. This has led to new clinical trials for several eye diseases that are yielding encouraging results. In the next few years, additional trials and longer-term results are anticipated to further develop ocular regenerative therapies, with the potential to revolutionize our approach to ophthalmic disease and damage.
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Affiliation(s)
- Timothy A Blenkinsop
- Neural Stem Cell Institute, Regenerative Research Foundation, One Discovery Drive, Rensselaer, NY12144, USA
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46
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Da Silva GR, Da Silva-Cunha A, Vieira LC, Silva LM, Ayres E, Oréfice RL, Fialho SL, Saliba JB, Behar-Cohen F. Montmorillonite clay based polyurethane nanocomposite as substrate for retinal pigment epithelial cell growth. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2013; 24:1309-1317. [PMID: 23430334 DOI: 10.1007/s10856-013-4885-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2012] [Accepted: 02/04/2013] [Indexed: 06/01/2023]
Abstract
The subretinal transplantation of retinal pigment epithelial cells (RPE cells) grown on polymeric supports may have interest in retinal diseases affecting RPE cells. In this study, montmorillonite based polyurethane nanocomposite (PU-NC) was investigated as substrate for human RPE cell growth (ARPE-19 cells). The ARPE-19 cells were seeded on the PU-NC, and cell viability, proliferation and differentiation were investigated. The results indicated that ARPE-19 cells attached, proliferated onto the PU-NC, and expressed occludin. The in vivo ocular biocompatibility of the PU-NC was assessed by using the HET-CAM; and through its implantation under the retina. The direct application of the nanocomposite onto the CAM did not compromise the vascular tissue in the CAM surface, suggesting no ocular irritancy of the PU-NC film. The nanocomposite did not elicit any inflammatory response when implanted into the eye of rats. The PU-NC may have potential application as a substrate for RPE cell transplantation.
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Affiliation(s)
- Gisele Rodrigues Da Silva
- School of Pharmacy, Federal University of São João Del Rei, Av. Sebastião Gonçalves Coelho 400, Chanadour, Divinópolis, Minas Gerais 35500-296, Brazil.
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47
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Viczian AS. Advances in retinal stem cell biology. J Ophthalmic Vis Res 2013; 8:147-59. [PMID: 23943690 PMCID: PMC3740467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2013] [Accepted: 03/14/2013] [Indexed: 11/21/2022] Open
Abstract
Tremendous progress has been made in recent years to generate retinal cells from pluripotent cell sources. These advances provide hope for those suffering from blindness due to lost retinal cells. Understanding the intrinsic genetic network in model organisms, like fly and frog, has led to a better understanding of the extrinsic signaling pathways necessary for retinal progenitor cell formation in mouse and human cell cultures. This review focuses on the culture methods used by different groups, which has culminated in the generation of laminated retinal tissue from both embryonic and induced pluripotent cells. The review also briefly describes advances made in transplantation studies using donor retinal progenitor and cultured retinal cells.
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Affiliation(s)
- Andrea S. Viczian
- Correspondence to: Andrea S. Viczian, PhD. Department of Ophthalmology, Center for Vision Research, SUNY Eye Institute, Upstate Medical University, 750 East Adams Street, Syracuse, NY 13210, USA;
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48
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Zheng W, Zhang W, Jiang X. Precise control of cell adhesion by combination of surface chemistry and soft lithography. Adv Healthc Mater 2013. [PMID: 23184447 DOI: 10.1002/adhm.201200104] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The adhesion of cells on an extracellular matrix (ECM) (in vivo) or the surfaces of materials (in vitro) is a prerequisite for most cells to survive. The rapid growth of nano/microfabrication and biomaterial technologies has provided new materials with excellent surfaces with specific, desirable biological interactions with their surroundings. On one hand, the chemical and physical properties of material surfaces exert an extensive influence on cell adhesion, proliferation, migration, and differentiation. On the other hand, material surfaces are useful for fundamental cell biology research and tissue engineering. In this Review, an overview will be given of the chemical and physical properties of newly developed material surfaces and their biological effects, as well as soft lithographic techniques and their applications in cell biology research. Recent advances in the manipulation of cell adhesion by the combination of surface chemistry and soft lithography will also be highlighted.
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Affiliation(s)
- Wenfu Zheng
- National Center for NanoScience and Technology, Beijing, China
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49
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Gregory-Evans CY, Wallace VA, Gregory-Evans K. Gene networks: dissecting pathways in retinal development and disease. Prog Retin Eye Res 2012; 33:40-66. [PMID: 23128416 DOI: 10.1016/j.preteyeres.2012.10.003] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2012] [Revised: 10/18/2012] [Accepted: 10/19/2012] [Indexed: 01/21/2023]
Abstract
During retinal neurogenesis, diverse cellular subtypes originate from multipotent neural progenitors in a spatiotemporal order leading to a highly specialized laminar structure combined with a distinct mosaic architecture. This is driven by the combinatorial action of transcription factors and signaling molecules which specify cell fate and differentiation. The emerging approach of gene network analysis has allowed a better understanding of the functional relationships between genes expressed in the developing retina. For instance, these gene networks have identified transcriptional hubs that have revealed potential targets and pathways for the development of therapeutic options for retinal diseases. Much of the current knowledge has been informed by targeted gene deletion experiments and gain-of-functional analysis. In this review we will provide an update on retinal development gene networks and address the wider implications for future disease therapeutics.
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Affiliation(s)
- Cheryl Y Gregory-Evans
- Department of Ophthalmology, University of British Columbia, Vancouver, BC V5Z 3N9, Canada.
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50
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Jin ZB, Takahashi M. Generation of retinal cells from pluripotent stem cells. PROGRESS IN BRAIN RESEARCH 2012. [PMID: 23186714 DOI: 10.1016/b978-0-444-59544-7.00008-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Retinal degeneration is a leading cause of incurable low vision and blindness worldwide. Most retinal degenerative diseases are caused by irreversible apoptosis of retinal neural cells or adjacent supporting tissue. Because there is no radical treatment for retinal degeneration, most therapies are aimed at specific situations, such as drug or surgical intervention for late complications. Retinal cell replacement would be valuable for regenerating functional retinas, and therefore it is being examined as a next-generation treatment for retinal degeneration. With advances in stem cell biology, considerable progress has been made in recent years on generation of retinal cells. Both sensory retinal neural cells and retinal pigment epithelial cells can be induced in vitro from pluripotent stem cells, including embryonic stem cells and induced pluripotent stem cells. Here, we review the stepwise differentiation of retinal cells from pluripotent stem cells, with emphases on the methodology and application potential.
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Affiliation(s)
- Zi-Bing Jin
- Laboratory for Stem Cell & Retinal Regeneration, Center for Vision Research, The Eye Hospital, School of Ophthalmology & Optometry, Wenzhou Medical College, Wenzhou, China.
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