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Borrelli M, Witt J, Roth M, Reichl S, Bradenbrink P, Schoppe M, Schrader S, Geerling G. Keratin films for ocular surface reconstruction: Wound healing in an in-vivo model. Exp Eye Res 2023; 227:109356. [PMID: 36563893 DOI: 10.1016/j.exer.2022.109356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 11/16/2022] [Accepted: 12/19/2022] [Indexed: 12/24/2022]
Abstract
The most commonly used tissue substitute for ocular surface reconstruction is human amniotic membrane (AM). Because of its low biomechanical strength and intransparency there is a need to search for alternatives of consistent quality. This study, further explored the biocompatibility of Keratin Film (KF) and its ability to sustain corneal epithelial wound healing. In three equal groups of 5 New Zeeland white rabbits a 4 mm superficial keratectomy was created in the right eye. Five eyes received a KF, five a human AM graft and the remaining five no implant. All eyes were treated with ofloxacin and dexamethasone eye drops and followed up for 10 days. Corneal fluorescein staining, vascularization, and transparency were assessed using slit lamp biomicroscopy according to a standardized grading score during and at the end of follow-up. The corneal-scleral-button was excised and processed for histology. After 10 days all eyes which had received a KF showed complete epithelial healing and no signs of neovascularization. In the AM group 1 eye showed a persistent epithelial defect at day 10 and 2 eyes showed neovascularization at day 7 resolving at day 10. Transparency improved progressively both in the KF group as well as in the AM group towards the end of the follow. Histology showed a multilayer epithelium firmly adherent to the KF with no evidence of keratocyte migration or inflammatory reaction in the corneal stroma. In this study on rabbit eyes KF better supported corneal epithelial wound healing than amniotic membrane.
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Affiliation(s)
- M Borrelli
- Department of Ophthalmology, University of Duesseldorf, Germany.
| | - J Witt
- Department of Ophthalmology, University of Duesseldorf, Germany
| | - M Roth
- Department of Ophthalmology, University of Duesseldorf, Germany
| | - S Reichl
- Institute of Pharmaceutical Technology, Technical University of Braunschweig, Germany
| | - P Bradenbrink
- Department of Ophthalmology, University of Duesseldorf, Germany
| | - M Schoppe
- Department of Pathology, University of Duesseldorf, Germany
| | - S Schrader
- Department of Ophthalmology, Carl von Ossietzky University Oldenburg, Germany
| | - G Geerling
- Department of Ophthalmology, University of Duesseldorf, Germany
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Maini S, Hurley-Bennett K, Dawson C. Case Series Describing the Use of Low-Temperature Vacuum-Dehydrated Amnion (Omnigen) for the Treatment of Corneal Ulcers in Cats and Dogs: 46 Cases (2016-2017). Top Companion Anim Med 2020; 41:100474. [PMID: 32919060 DOI: 10.1016/j.tcam.2020.100474] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 08/26/2020] [Accepted: 09/04/2020] [Indexed: 12/13/2022]
Abstract
Amniotic membrane is widely used in the treatment of ocular surface disorders in human and veterinary patients. Preservation and storage of amnion has proven challenging, prompting the development of new preservation techniques. Omnigen, a novel low-temperature vacuum-dehydrated amnion, is reported to possess enhanced structural properties and biochemical stability in vitro, but its clinical use in veterinary patients is not well described. This study aims to document and describe the varied use of Omnigen for the surgical treatment of corneal ulceration in cats and dogs. A total of 45 patients (46 eyes) were recruited from the clinical record system of the Royal Veterinary College (London) between January 2016 and December 2017. Brachycephalic breeds were over-represented (37/45; 82.2%). Omnigen was used as a standalone graft in 5/46 (10.9%) eyes, as a supplementary graft in 29/46 (63.0%) eyes and as a patch in 12/46 (26.1%) eyes. Graft failure occurred in 10/46 eyes (21.7%). At final examination 43/46 eyes (93.5%) had healed and 31/33 eyes (93.9%) were visual. This study demonstrates the successful use of Omnigen for the surgical treatment of corneal ulceration in cats and dogs. Further studies are needed to clarify its properties and benefits in the clinical field.
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Affiliation(s)
- Serena Maini
- Department of Clinical Science and Services, The Royal Veterinary College, Ophthalmology Service, University of London, North Mymms, Herts, UK.
| | - Kiera Hurley-Bennett
- Department of Clinical Science and Services, The Royal Veterinary College, Ophthalmology Service, University of London, North Mymms, Herts, UK
| | - Charlotte Dawson
- Department of Clinical Science and Services, The Royal Veterinary College, Ophthalmology Service, University of London, North Mymms, Herts, UK
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Gholipourmalekabadi M, Farhadihosseinabadi B, Faraji M, Nourani MR. How preparation and preservation procedures affect the properties of amniotic membrane? How safe are the procedures? Burns 2019; 46:1254-1271. [PMID: 31445711 DOI: 10.1016/j.burns.2019.07.005] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 05/14/2019] [Accepted: 07/03/2019] [Indexed: 12/22/2022]
Abstract
Human amniotic membrane (AM) has been widely used for tissue engineering and regenerative medicine applications. AM has many favorable characteristics such as high biocompatibility, antibacterial activity, anti-scarring property, immunomodulatory effects, anti-cancer behavior and contains several growth factors that make it an excellent natural candidate for wound healing. To date, various methods have been developed to prepare, preserve, cross-link and sterilize the AM. These methods remarkably affect the morphological, physico-chemical and biological properties of AM. Optimization of an effective and safe method for preparation and preservation of AM for a specific application is critical. In this review, the isolation, different methods of preparation, preservation, cross-linking and sterilization as well as their effects on properties of AM are well discussed. For each section, at least one effective and safe protocol is described in detail.
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Affiliation(s)
- Mazaher Gholipourmalekabadi
- Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran; Department of Tissue Engineering & Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran; Department of Molecular Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medicine Sciences, Tehran, Iran
| | - Behrouz Farhadihosseinabadi
- Department of Biotechnology, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Student Research Committee, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mehdi Faraji
- Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran; Department of Tissue Engineering & Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Mohammad Reza Nourani
- Chemical Injuries Research Center, Systems Biology and Poisoning Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran; Nanobiotechnology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran.
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Kim TG, Do Ki K, Lee MK, So JW, Chung SK, Kang J. Comparison of cytokine expression and ultrastructural alterations in fresh-frozen and dried electron beam-irradiated human amniotic membrane and chorion. Cell Tissue Bank 2019; 20:163-172. [PMID: 31062125 DOI: 10.1007/s10561-019-09748-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Accepted: 01/03/2019] [Indexed: 10/26/2022]
Abstract
The purpose of the current study was to compare the effects of drying and fresh-freezing on human amniotic membrane (HAM) and amnion/chorion membrane (HACM) in terms of histological and structural characteristics and cytokine levels. HAM and HACM samples, obtained from six placentae, were investigated. HAM and HACM were dried, electron beam-irradiated (dehydration group; d-HAM/d-HACM), or fresh-frozen (freezing group; f-HAM/f-HACM). Luminex assay was used to assay the levels of 15 cytokines. The ultrastructural characteristics of HAM and HACM were evaluated using light and transmission electron microscopies. Total cytokine contents did not show the statistical difference between dehydration and fresh-freezing process. Significantly higher levels of total cytokines were observed in HACM than in HAM. Epidermal growth factor (EGF) level was significantly higher in d-HAM than in the other samples. The levels of most of the other growth factors were higher in HACM than in HAM, but there was no statistical difference between the dehydration process and the fresh-freezing process. The levels of the cytokines, other than the growth factors, were higher in HACM than in HAM, and higher concentrations of cytokines were observed in the freezing group than in the dehydration group. Histological examination revealed that the dehydration group had thinner tissues than the freezing group, but the structural stability, including the basement membrane, did not differ between the two groups. Microscopic structures such as microvilli and nuclei were well-preserved in the freezing group, based on the results of the transmission electron microscopy. Our dehydration process maintained the histological structure of HAM/HACM and a variety of growth factors and cytokines were identified. Especially, the HAM, processed with the dehydration method, had a higher EGF level than that processed with the fresh-freezing method. Therefore, dehydration method can be used to effectively promote wound repair.
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Affiliation(s)
- Tae Gi Kim
- Department of Ophthalmology, Kyung Hee University Hospital at Gangdong, Kyung Hee University, # 892, Dongnam-ro, Gangdong-gu, Seoul, 05278, Republic of Korea
| | - Kyung Do Ki
- Department of Obstetrics and Gynecology, Kyung Hee University Hospital at Gangdong, Kyung Hee University, Seoul, Republic of Korea
| | - Myeong-Kyu Lee
- Department of Research and Development, Korea Public Tissue Bank, Seoul, Republic of Korea
| | - Jung-Won So
- Department of Research and Development, Korea Public Tissue Bank, Seoul, Republic of Korea
| | | | - Jaheon Kang
- Department of Ophthalmology, Kyung Hee University Hospital at Gangdong, Kyung Hee University, # 892, Dongnam-ro, Gangdong-gu, Seoul, 05278, Republic of Korea.
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Jang IK, Jung HJ, Noh OK, Lee DH, Lee KC, Park JE. B7‑H1‑mediated immunosuppressive properties in human mesenchymal stem cells are mediated by STAT‑1 and not PI3K/Akt signaling. Mol Med Rep 2018; 18:1842-1848. [PMID: 29901104 DOI: 10.3892/mmr.2018.9102] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2017] [Accepted: 05/01/2018] [Indexed: 11/06/2022] Open
Abstract
Mesenchymal stem cells (MSCs), derived from either bone marrow (BM) or Wharton's jelly (WJ), inhibit the proliferation of activated T cells, and interferon (IFN)‑γ serves an important role in this process. This process is B7‑homolog (H)1‑dependent during cell contact inhibition. However, the signaling pathway involved in B7‑H1 expression in MSCs remains largely undefined. The present study demonstrated activation of B7‑H1 by engaging signal transducer and activator of transcription (STAT)‑1 signaling in MSCs. Human BM‑ and WJ‑MSCs were isolated and cultured. The immunosuppressive effect of BM‑ and WJ‑MSCs on phytohemagglutinin (PHA)‑induced T cell proliferation was compared using direct and indirect co‑culture systems. B7‑H1 expression on BM‑ and WJ‑MSCs was detected by flow cytometry. Small interfering (si)RNA was used to knock down the expression of STAT‑1. The inhibitory effect of MSCs on T lymphocytes was observed using PHA‑induced T cell proliferation assays. IFN‑γ‑induced B7‑H1 expression on human BM‑ and WJ‑MSCs increased in a time‑dependent manner. Furthermore, the inhibitory effect of MSCs on T cell proliferation was be restored when an anti‑B7‑H1 monoclonal antibody was used. When STAT‑1 signaling was inhibited by siRNA, B7‑H1 expression on IFN‑γ‑treated MSCs decreased and T cell proliferation was restored; however, the expression of B7‑H1 did not alter upon treatment with a phosphatidylinositol‑3‑kinase (PI3K) inhibitor (LY294002). These results demonstrated that the IFN‑γ‑induced immunosuppressive properties of B7‑H1 in human BM‑ and WJ‑MSCs were mediated by STAT‑1 signaling, and not by PI3K/RAC‑α serine/threonine‑protein kinase signaling. Understanding the intracellular mechanisms underlying IFN‑γ‑induced expression of B7‑H1 in MSCs may ultimately lead to an improved understanding of MSCs and provide insight into their use as cell therapy agents.
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Affiliation(s)
- In Keun Jang
- Department of Pediatrics, Ajou University School of Medicine, Suwon 16499, Republic of Korea
| | - Hyun Joo Jung
- Department of Pediatrics, Ajou University School of Medicine, Suwon 16499, Republic of Korea
| | - O Kyu Noh
- Department of Radiation Oncology, Ajou University School of Medicine, Suwon 16499, Republic of Korea
| | - Doo-Hoon Lee
- Biomedical Research Institute, Lifeliver Co., Ltd., Yongin 16866, Republic of Korea
| | - Kwang Chul Lee
- Department of Pediatrics, College of Medicine, Korea University, Seoul 02841, Republic of Korea
| | - Jun Eun Park
- Department of Pediatrics, Ajou University School of Medicine, Suwon 16499, Republic of Korea
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Borrelli M, Joepen N, Reichl S, Finis D, Schoppe M, Geerling G, Schrader S. Keratin films for ocular surface reconstruction: Evaluation of biocompatibility in an in-vivo model. Biomaterials 2015; 42:112-20. [DOI: 10.1016/j.biomaterials.2014.11.038] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Revised: 11/13/2014] [Accepted: 11/24/2014] [Indexed: 02/04/2023]
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Amniotic epithelial cells have different in vitro proliferation capacity depending on their anatomical origin. BIOTECHNOL BIOPROC E 2015. [DOI: 10.1007/s12257-014-0299-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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8
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Anti-neovascular effect of chondrocyte-derived extracellular matrix on corneal alkaline burns in rabbits. Graefes Arch Clin Exp Ophthalmol 2014; 252:951-61. [DOI: 10.1007/s00417-014-2633-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2014] [Revised: 03/18/2014] [Accepted: 04/03/2014] [Indexed: 10/25/2022] Open
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Allen CL, Clare G, Stewart EA, Branch MJ, McIntosh OD, Dadhwal M, Dua HS, Hopkinson A. Augmented dried versus cryopreserved amniotic membrane as an ocular surface dressing. PLoS One 2013; 8:e78441. [PMID: 24205233 PMCID: PMC3813584 DOI: 10.1371/journal.pone.0078441] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2013] [Accepted: 09/11/2013] [Indexed: 02/06/2023] Open
Abstract
Purpose Dried amniotic membrane (AM) can be a useful therapeutic adjunct in ophthalmic surgery and possesses logistical advantages over cryopreserved AM. Differences in preservation techniques can significantly influence the biochemical composition and physical properties of AM, potentially affecting clinical efficacy. This study was established to investigate the biochemical and structural effects of drying AM in the absence and presence of saccharide lyoprotectants and its biocompatibility compared to cryopreserved material. Methods AM was cryopreserved or dried with and without pre-treatment with trehalose or raffinose and the antioxidant epigallocatechin (EGCG). Structural and visual comparisons were assessed using electron microscopy. Localisation, expression and release of AM biological factors were determined using immunoassays and immunofluorescence. The biocompatibility of the AM preparations co-cultured with corneal epithelial cell (CEC) or keratocyte monolayers were assessed using cell proliferation, cytotoxicity, apoptosis and migration assays. Results Drying devitalised AM epithelium, but less than cryopreservation and cellular damage was reduced in dried AM pre-treated with trehalose or raffinose. Dried AM alone, and with trehalose or raffinose showed greater factor retention efficiencies and bioavailability compared to cryopreserved AM and demonstrated a more sustained biochemical factor time release in vitro. Cellular health assays showed that dried AM with trehalose or raffinose are compatible and superior substrates compared to cryopreserved AM for primary CEC expansion, with increased proliferation and reduced LDH and caspase-3 levels. This concept was supported by improved wound healing in an immortalised human CEC line (hiCEC) co-cultured with dried and trehalose or raffinose membranes, compared to cryopreserved and fresh AM. Conclusions Our modified preservation process and our resultant optimised dried AM has enhanced structural properties and biochemical stability and is a superior substrate to conventional cryopreserved AM. In addition this product is stable and easily transportable allowing it to be globally wide reaching for use in clinical and military sectors.
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Affiliation(s)
- Claire L. Allen
- Ophthalmology, Division of Clinical Neuroscience, University of Nottingham, Nottingham, United Kingdom
| | - Gerry Clare
- Ophthalmology, Division of Clinical Neuroscience, University of Nottingham, Nottingham, United Kingdom
| | - Elizabeth A. Stewart
- Ophthalmology, Division of Clinical Neuroscience, University of Nottingham, Nottingham, United Kingdom
| | - Matthew J. Branch
- Ophthalmology, Division of Clinical Neuroscience, University of Nottingham, Nottingham, United Kingdom
| | - Owen D. McIntosh
- Ophthalmology, Division of Clinical Neuroscience, University of Nottingham, Nottingham, United Kingdom
| | - Megha Dadhwal
- Ophthalmology, Division of Clinical Neuroscience, University of Nottingham, Nottingham, United Kingdom
| | - Harminder S. Dua
- Ophthalmology, Division of Clinical Neuroscience, University of Nottingham, Nottingham, United Kingdom
| | - Andrew Hopkinson
- Ophthalmology, Division of Clinical Neuroscience, University of Nottingham, Nottingham, United Kingdom
- * E-mail:
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Chen RN, Lee LW, Chen LC, Ho HO, Lui SC, Sheu MT, Su CH. Wound-healing effect of micronized sacchachitin (mSC) nanogel on corneal epithelium. Int J Nanomedicine 2012; 7:4697-706. [PMID: 22956870 PMCID: PMC3431972 DOI: 10.2147/ijn.s34530] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
The extraction residue of the Ganoderma fruiting body, named sacchachitin, has been demonstrated to have the potential to enhance cutaneous wound healing by inducing cell proliferation. In this study, a nanogel formed from micronized sacchachitin (mSC) was investigated for the potential treatment of superficial chemical corneal burns. Reportedly, mSC has been produced successfully and its chemical properties confirmed, and physical and rheological properties characterized. An in vitro cell proliferation study has revealed that at the concentrations of 200, 300, and 400 μg/mL, mSC nanogel significantly increased Statens Seruminstitut rabbit corneal (SIRC) cell proliferation after 24 hours of incubation. In cell migration assay, migration of SIRC cell to wound closure was observed after 24 hours of incubation with the addition of 200 μg/mL mSC of nanogel. In an animal study, acceleration of corneal wound healing was probably due to the inhibition of proteolysis. In conclusion, the findings of this study substantiate the potential application of sacchachitin in the form of mSC nanogel for the treatment of superficial corneal injuries.
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Affiliation(s)
- Ray-Neng Chen
- Department of Cosmetic Science and Management, Mackay Medicine, Nursing and Management College, Taipei, Republic of China
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12
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Bray LJ, George KA, Ainscough SL, Hutmacher DW, Chirila TV, Harkin DG. Human corneal epithelial equivalents constructed on Bombyx mori silk fibroin membranes. Biomaterials 2011; 32:5086-91. [DOI: 10.1016/j.biomaterials.2011.03.068] [Citation(s) in RCA: 123] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2011] [Accepted: 03/29/2011] [Indexed: 01/06/2023]
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Yin L, Pi YL. Effect of amnion membrane transplantation on corneal neovascularization in 10 patients with alkali burn. Int J Ophthalmol 2011; 4:110-1. [PMID: 22553622 DOI: 10.3980/j.issn.2222-3959.2011.01.25] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2010] [Accepted: 12/28/2010] [Indexed: 11/02/2022] Open
Abstract
By observing clinical cases, we studied the curative effect of amnion membrane transplantation on decreasing corneal neovascularization (CNV). It was a non-randomized retrospective case-control study. Among 17 cases (21 eyes) of third-degree alkali burns from 2007 to 2010, 10 cases (12 eyes) were performed with amnion membrane transplantation operation, and others were not. Amnion membrane transplantation was performed at the 3(rd) day after burn in the treatment group. Areas of CNV in double groups were measured at the 14(th) day and 60(th) day after burn. Area of CNV in the treatment group was (66.207±7.251)mm(2) at the 14(th) day after burn, and was 18.27% lower than that in the control group. Area of CNV in the treatment group was (120.046±13.812)mm(2) at the 60(th) day after burn, and was 11.35% lower than that in the control group. There was both statistical significance (P<0.05). Amnion membrane transplantation operation can inhibit the growth of corneal neovascularization induced by alkali burn.
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Affiliation(s)
- Lan Yin
- Department of Ophthalmology, the First Affiliated Hospital of General Hospital of PLA, Beijing 100048, China
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New technologies in limbal epithelial stem cell transplantation. Curr Opin Biotechnol 2009; 20:593-7. [PMID: 19833502 DOI: 10.1016/j.copbio.2009.09.002] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2009] [Accepted: 09/16/2009] [Indexed: 02/07/2023]
Abstract
Destruction of the limbal epithelial stem cell (LESC) population in the cornea can lead to disorders that result in chronic inflammation, pain and impaired vision. Amniotic membrane (AM) is commonly used as a substrate for LESC transplantation for ocular surface repair but it is not an ideal substrate and so attempts have been made to find a more suitable alternative. The possible substitutes reviewed here include modified AM, cell carriers such as contact lenses or gauze as well as natural substrates fibrin and silk fibroin and many collagen-based scaffolds. Although there are a number of interesting systems in development, the search for an appropriate alternative continues.
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Yoo KH, Jang IK, Lee MW, Kim HE, Yang MS, Eom Y, Lee JE, Kim YJ, Yang SK, Jung HL, Sung KW, Kim CW, Koo HH. Comparison of immunomodulatory properties of mesenchymal stem cells derived from adult human tissues. Cell Immunol 2009; 259:150-6. [PMID: 19608159 DOI: 10.1016/j.cellimm.2009.06.010] [Citation(s) in RCA: 287] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2009] [Revised: 06/12/2009] [Accepted: 06/12/2009] [Indexed: 12/14/2022]
Abstract
Mesenchymal stem cells (MSCs), which evoke only minimal immune reactivity, may have anti-inflammatory and immunomodulatory effects. In this study, we conducted a comparative analysis of the immunomodulatory properties of MSCs derived from adult human tissues including bone marrow (BM), adipose tissues (AT), umbilical cord blood (CB), and cord Wharton's jelly (WJ). Using a multiple cytokine detection assay, we showed that there were no significant differences in levels of secreted factors from non-stimulated MSCs. We compared the immunosuppressive effect of BM-MSCs, AT-MSCs, CB-MSCs, and WJ-MSCs on phytohemagglutinin-induced T-cell proliferation. AT-MSCs, CB-MSCs, and WJ-MSCs effectively suppressed mitogen-induced T-cell proliferation as effectively as did BM-MSCs. Levels of interferon (IFN)-gamma and tumor necrosis factor (TNF)-alpha secreted from activated T-cells increased over time, but these levels were significantly reduced when cocultured with each type of MSCs. In addition, the expression of hepatocyte growth factor, IL-10, transforming growth factor-beta(1), cyclooxygenase (COX)-1, and COX-2 were unchanged in MSCs treated with IFN-gamma and/or TNF-alpha, while indoleamine 2,3-dioxygenase (IDO) expression increased. IFN-gamma and/or TNF-alpha produced by activated T-cells were correlated with induction of IDO expression by MSCs, which, in turn, suppressed T-cell proliferation. These findings suggest that MSCs derived from AT, CB, or WJ could be substituted for BM-MSCs for treatment of allogeneic conflicts.
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Affiliation(s)
- Keon Hee Yoo
- Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
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Miyashita H, Shimmura S, Higa K, Yoshida S, Kawakita T, Shimazaki J, Tsubota K. A novel NIH/3T3 duplex feeder system to engineer corneal epithelial sheets with enhanced cytokeratin 15-positive progenitor populations. Tissue Eng Part A 2008; 14:1275-82. [PMID: 18433313 DOI: 10.1089/ten.tea.2007.0212] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Corneal epithelial cell sheets co-cultivated with feeder cells are used to reconstruct the ocular surface in stem cell-depleted eyes. The present study was conducted to investigate the optimal method of using feeder cells in the interest of preserving progenitor cells in cultivated sheets. We compared the phenotype and secondary colony forming efficiency (CFE) of cell sheets that were engineered using 3T3 feeder cells as a separate layer or as a contact layer. We also devised a novel "duplex feeder" system that consists of two separate layers of feeder cells. After cells reached confluence, cells were cultured at the air-liquid interface to allow full stratification. Stratified sheets were then analyzed using immunohistochemistry and secondary colony formation. Contact feeder cultures and duplex feeder cultures yielded epithelial sheets with small, cuboid basal cells with strong expression of keratin (K)3, K12, and K 15. Furthermore, only duplex feeder layers reproduced the basal K 15, suprabasal K12 limbal phenotype where epithelial stem cells reside. A similar effect was observed when cornea stroma-derived progenitor cells were used as feeder cells. Duplex feeder sheets also produced significantly more secondary colonies than cells dissociated from single layer sheets, suggesting that the duplex feeder system produces transplantable sheets with a higher yield of progenitor cells.
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Affiliation(s)
- Hideyuki Miyashita
- Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan
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Reconstruction of a rabbit corneal epithelium on a lyophilized amniotic membrane using tilting air-liquid interface culture followed by tilting submerged culture. BIOTECHNOL BIOPROC E 2008. [DOI: 10.1007/s12257-008-0001-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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19
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Miyashita H, Shimmura S, Higa K, Yoshida S, Kawakita T, Shimazaki J, Tsubota K. A Novel NIH/3T3 Duplex Feeder System to Engineer Corneal Epithelial Sheets with Enhanced Cytokeratin 15-Positive Progenitor Populations. Tissue Eng Part A 2008. [DOI: 10.1089/tea.2007.0212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Ahn JI, Lee DH, Ryu YH, Jang IK, Yoon MY, Shin YH, Seo YK, Yoon HH, Kim JC, Song KY, Yang EK, Kim KH, Park JK. Reconstruction of rabbit corneal epithelium on lyophilized amniotic membrane using the tilting dynamic culture method. Artif Organs 2007; 31:711-21. [PMID: 17725699 DOI: 10.1111/j.1525-1594.2007.00441.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Rabbit corneal epithelium was reconstructed using tilting dynamic culture with a self-manufactured, amniotic membrane (AM) supporter and a lyophilized amniotic membrane (LAM). Rabbit corneal epithelial (RCE) cells were cultured and cryopreserved after isolation from the limbus. The second- and third-passage RCE cells were plated onto the epithelial side of the LAM of Ahn's AM supporter. Two days later, the air-liquid interface culture was maintained with third-passage RCE cells for 6 days and second-passage corneal epithelial cells for 9 days. The average viability of thawed RCE cells, assessed using trypan blue dye exclusion, was 77.42%. The reconstructed corneal epithelium was characterized by histological (hematoxylin and eosin) and immunohistochemical staining (proliferating cell nuclear antigen) for light microscopy, and by reverse transcriptase-polymerase chain reaction, glucose assay, and transmission electron microscopy. The basal layer of the reconstructed corneal epithelium was well formed, and the epithelium was tightly constructed due to the increase in cell proliferation and differentiation caused by the tilting dynamic culture, as opposed to static culture. Tilting dynamic culture was useful for the reconstruction of the epithelium using easily damaged epithelial cells and resulted in more stratum cell layers. Moreover, cytokeratin (CK3) mRNA expression in tilting dynamic cultured third-passage RCE cells seeded onto AM was greater than in static cultured third-passage RCE cells. The morphology of the reconstructed corneal epithelium on LAM by tilting dynamic culture for 9 days resembled that of the skin epidermis. This was thought to be because the tilting dynamic culture not only accelerated the proliferation and differentiation of cells by physical or mechanical stimulation, but also ensured that the supply of medium was delivered to the basal cells more efficiently. Thus, the reconstruction of the corneal epithelium using LAM and tilting dynamic culture was considered to be a good in vitro model for autologous or allogeneic transplantation of corneal epithelium and skin epidermis in patients with damaged epithelia.
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Affiliation(s)
- Jae-Il Ahn
- Department of Chemical and Biochemical Engineering, Dongguk University, Seoul, Korea
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Malchesky PS. Artificial Organs 2006: a year in review. Artif Organs 2007; 31:225-41. [PMID: 17343699 DOI: 10.1111/j.1525-1594.2007.00370.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Paul S Malchesky
- Artificial Organs Editorial Office, 10 West Erie Street, Painesville, OH 44077, USA.
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