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Ursavas S, Darici H, Karaoz E. Olfactory ensheathing cells: Unique glial cells promising for treatments of spinal cord injury. J Neurosci Res 2021; 99:1579-1597. [PMID: 33605466 DOI: 10.1002/jnr.24817] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Accepted: 02/08/2021] [Indexed: 12/26/2022]
Abstract
Spinal cord injury (SCI) is generally the consequence of physical damage, which may result in devastating consequences such as paraplegia or paralysis. Some certain candidates for SCI repair are olfactory ensheathing cells (OECs), which are unique glial cells located in the transition region of the peripheral nervous system and central nervous system and perform neuron regeneration in the olfactory system throughout life. Culture studies have clarified many properties of OECs, but their mechanisms of actions are not fully understood. Successful results achieved in animal models showcased that SCI treatment with OEC transplants is suitable for clinical trials. However, clinical trials are limited by difficulties like cell acquisition for autograft transplantation. Despite the improvements in both animal and clinical studies so far, there is still insufficient information about the mechanism of actions, adverse effects, proper application methods, effective subtypes, and sources of cells. This review summarizes pre-clinical and clinical literature focused on the cellular characterization of both OECs in vitro and post-transplantation. We highlight the roles and effects of OECs on (a) the injury-induced glial milieu, (b) neuronal growth/regeneration, and (c) functional recovery after injury. Due to the shown benefits of OECs with in vitro and animal studies and a limited number of clinical trials, where safety and effectivity were shown, it is necessary to conduct more studies on OECs to obtain effective and feasible treatment methods.
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Affiliation(s)
- Selin Ursavas
- Department of Histology and Embryology, Faculty of Medicine, Istinye University, Istanbul, Turkey
| | - Hakan Darici
- Department of Histology and Embryology, Faculty of Medicine, Istinye University, Istanbul, Turkey
| | - Erdal Karaoz
- Department of Histology and Embryology, Faculty of Medicine, Istinye University, Istanbul, Turkey.,Center for Stem Cell and Tissue Engineering Research & Practice, Istinye University, Istanbul, Turkey.,Center for Regenerative Medicine and Stem Cell Research and Manufacturing, Liv Hospital, Istanbul, Turkey
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2
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Smith KE, Whitcroft K, Law S, Andrews P, Choi D, Jagger DJ. Olfactory ensheathing cells from the nasal mucosa and olfactory bulb have distinct membrane properties. J Neurosci Res 2019; 98:888-901. [PMID: 31797433 DOI: 10.1002/jnr.24566] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 11/14/2019] [Accepted: 11/14/2019] [Indexed: 12/15/2022]
Abstract
Transplantation of olfactory ensheathing cells (OECs) is a potential therapy for the regeneration of damaged neurons. While they maintain tissue homeostasis in the olfactory mucosa (OM) and olfactory bulb (OB), their regenerative properties also support the normal sense of smell by enabling continual turnover and axonal regrowth of olfactory sensory neurons (OSNs). However, the molecular physiology of OECs is not fully understood, especially that of OECs from the mucosa. Here, we carried out whole-cell patch-clamp recordings from individual OECs cultured from the OM and OB of the adult rat, and from the human OM. A subset of OECs from the rat OM cultured 1-3 days in vitro had large weakly rectifying K+ currents, which were sensitive to Ba2+ and desipramine, blockers of Kir4-family channels. Kir4.1 immunofluorescence was detectable in cultured OM cells colabeled for the OEC marker S100, and in S100-labeled cells found adjacent to OSN axons in mucosal sections. OECs cultured from rat OB had distinct properties though, displaying strongly rectifying inward currents at hyperpolarized membrane potentials and strongly rectifying outward currents at depolarized potentials. Kir4.1 immunofluorescence was not evident in OECs adjacent to axons of OSNs in the OB. A subset of human OECs cultured from the OM of adults had membrane properties comparable to those of the rat OM that is dominated by Ba2+ -sensitive weak inwardly rectifying currents. The membrane properties of peripheral OECs are different to those of central OECs, suggesting they may play distinct roles during olfaction.
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Affiliation(s)
- Katie E Smith
- UCL Ear Institute, University College London, London, UK
| | - Katherine Whitcroft
- UCL Ear Institute, University College London, London, UK.,Royal National Throat Nose & Ear Hospital, London, UK
| | - Stuart Law
- Institute of Neurology, University College London, London, UK
| | - Peter Andrews
- UCL Ear Institute, University College London, London, UK.,Royal National Throat Nose & Ear Hospital, London, UK
| | - David Choi
- Institute of Neurology, University College London, London, UK
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3
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Xie J, Li Y, Dai J, He Y, Sun D, Dai C, Xu H, Yin ZQ. Olfactory Ensheathing Cells Grafted Into the Retina of RCS Rats Suppress Inflammation by Down-Regulating the JAK/STAT Pathway. Front Cell Neurosci 2019; 13:341. [PMID: 31402855 PMCID: PMC6670006 DOI: 10.3389/fncel.2019.00341] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Accepted: 07/11/2019] [Indexed: 01/23/2023] Open
Abstract
The inflammatory microenvironment in the retina plays a vital role in the pathogenesis and progression of retinitis pigmentosa (RP). Microglial inflammatory cytokines production leads to gliosis and apoptosis of retinal neurons, and ultimately, visual loss. Cell-based therapies using grafted olfactory ensheathing cells (OECs) have demonstrated modulation of degenerative microenvironments in the central nervous system (CNS), in a number of animal models. However, mechanisms by which grafted OECs can reduce degeneration in the retina are not well understood. In the present study, we set up an in vitro OEC/BV2 microglia co-culture system, and an in vivo royal college of surgeons (RCS) rat model, used cell transplantation, immunohistochemistry, RT-PCR, western blot to explore the mechanisms by which OECs affect expression of pro- or anti-inflammatory cytokines and polarization of M(IL-6) and M(Arg1) type microglial activation in the retina. We found that compared with the LPS (Lipopolysaccharide) and olfactory nerve fibroblast (ONF), the OEC and BV2 co-culture group modulate microglial cytokines releasing toward the anti-inflammation, and away from the pro-inflammation, which was followed by higher IL-4 and IL-10 and lower TNF-a and IL-6 in their expression levels. In vivo, the transplantation group significantly reduced activated resident microglia/infiltrated macrophage, and expression of pro-inflammatory cytokines in RCS rats retina, increased anti-inflammatory cytokines in transplantation area. Additionally, we found that OECs expressed SOCS3 and down-regulated the JAK2/STAT3 (Janus Kinase 2/Signal Transducer and Activator of Transcription 3) pathway. Thirdly, OEC transplantation reduced Caspase-3 expression, protected inner retinal neurons and photoreceptors and therefore, delayed the visual function degeneration. In conclusion, our data suggest that OECs delay retinal degeneration in RP, at least in part through immunomodulation of microglia via the JAK/STAT pathway.
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Affiliation(s)
- Jing Xie
- Southwest Eye Hospital, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China.,Key Laboratory of Visual Damage, Regeneration and Restoration of Chongqing, Chongqing, China
| | - Yijian Li
- Southwest Eye Hospital, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China.,Key Laboratory of Visual Damage, Regeneration and Restoration of Chongqing, Chongqing, China
| | - Jiaman Dai
- Southwest Eye Hospital, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China.,Key Laboratory of Visual Damage, Regeneration and Restoration of Chongqing, Chongqing, China
| | - Yan He
- Southwest Eye Hospital, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China.,Key Laboratory of Visual Damage, Regeneration and Restoration of Chongqing, Chongqing, China
| | - Dayu Sun
- Southwest Eye Hospital, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China.,Key Laboratory of Visual Damage, Regeneration and Restoration of Chongqing, Chongqing, China
| | - Chao Dai
- Southwest Eye Hospital, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China.,Key Laboratory of Visual Damage, Regeneration and Restoration of Chongqing, Chongqing, China
| | - Haiwei Xu
- Southwest Eye Hospital, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China.,Key Laboratory of Visual Damage, Regeneration and Restoration of Chongqing, Chongqing, China
| | - Zheng Qin Yin
- Southwest Eye Hospital, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China.,Key Laboratory of Visual Damage, Regeneration and Restoration of Chongqing, Chongqing, China
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Girerd C, Lihoreau T, Rabenorosoa K, Tamadazte B, Benassarou M, Tavernier L, Pazart L, Haffen E, Andreff N, Renaud P. In Vivo Inspection of the Olfactory Epithelium: Feasibility of Robotized Optical Biopsy. Ann Biomed Eng 2018; 46:1951-1961. [PMID: 29922959 DOI: 10.1007/s10439-018-2076-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Accepted: 06/12/2018] [Indexed: 10/28/2022]
Abstract
Inspecting the olfactory cleft can be of high interest, as it is an open access to neurons, and thus an opportunity to collect in situ related data in a non-invasive way. Also, recent studies show a strong link between olfactory deficiency and neurodegenerative diseases such as Alzheimer and Parkinson diseases. However, no inspection of this area is possible today, as it is very difficult to access. Only robot-assisted interventions seem viable to provide the required dexterity. The feasibility of this approach is demonstrated in this article, which shows that the path complexity to the olfactory cleft can be managed with a concentric tube robot (CTR), a particular type of continuum robot. First, new anatomical data are elaborated, in particular for the olfactory cleft, that remains hardly characterized. 3D reconstructions are conducted on the database of 20 subjects, using CT scan images. Measurements are performed to describe the anatomy, including metrics with inter-subject variability. Then, the existence of collision-free passageways for CTR is shown using the 3D reconstructions. Among the 20 subjects, 19 can be inspected using only 3 different robot geometries. This constitutes an essential step towards a robotic device to inspect subjects for clinical purposes.
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Affiliation(s)
- Cédric Girerd
- AVR-ICube, CNRS, Université de Strasbourg, INSA Strasbourg, 1 Place de l'Hôpital, 67000, Strasbourg, France.
| | - Thomas Lihoreau
- CIC Inserm 1431, Univ. Hospital of Besançon, Univ. Bourgogne Franche-Comté, 3 bd Alexandre Fleming, 25030, Besançon, France
| | - Kanty Rabenorosoa
- FEMTO-ST Institute, Univ. Bourgogne Franche-Comté/CNRS, Besançon, France
| | - Brahim Tamadazte
- FEMTO-ST Institute, Univ. Bourgogne Franche-Comté/CNRS, Besançon, France
| | - Mourad Benassarou
- La Pitié Salpêtrière Hospital, 47-83 Boulevard de l'Hôpital, 75013, Paris, France
| | - Laurent Tavernier
- Univ. Hospital of Besançon, Univ. Bourgogne Franche-Comté, 3 bd Alexandre Fleming, 25030, Besançon, France
| | - Lionel Pazart
- CIC Inserm 1431, Univ. Hospital of Besançon, Univ. Bourgogne Franche-Comté, 3 bd Alexandre Fleming, 25030, Besançon, France
| | - Emmanuel Haffen
- CIC Inserm 1431, Univ. Hospital of Besançon, Univ. Bourgogne Franche-Comté, 3 bd Alexandre Fleming, 25030, Besançon, France
| | - Nicolas Andreff
- FEMTO-ST Institute, Univ. Bourgogne Franche-Comté/CNRS, Besançon, France
| | - Pierre Renaud
- AVR-ICube, CNRS, Université de Strasbourg, INSA Strasbourg, 1 Place de l'Hôpital, 67000, Strasbourg, France
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Techaikool P, Daranarong D, Kongsuk J, Boonyawan D, Haron N, Harley WS, Thomson KA, Foster LJR, Punyodom W. Effects of plasma treatment on biocompatibility of poly[(L-lactide)-co
-(ϵ
-caprolactone)] and poly[(L-lactide)-co
-glycolide] electrospun nanofibrous membranes. POLYM INT 2017. [DOI: 10.1002/pi.5427] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Pimwalan Techaikool
- Department of Chemistry; Faculty of Science, Chiang Mai University; Chiang Mai Thailand
| | - Donraporn Daranarong
- Department of Chemistry; Faculty of Science, Chiang Mai University; Chiang Mai Thailand
| | - Jutamas Kongsuk
- Department of Chemistry; Faculty of Science, Chiang Mai University; Chiang Mai Thailand
| | - Dheerawan Boonyawan
- Department of Physics and Materials Science; Faculty of Science, Chiang Mai University; Chiang Mai Thailand
| | - Nursyuhada Haron
- Bio/Polymer Research Group, School of Biotechnology and Biomolecular Sciences; University of New South Wales; Sydney Australia
| | - William S Harley
- Bio/Polymer Research Group, School of Biotechnology and Biomolecular Sciences; University of New South Wales; Sydney Australia
| | - Kyle A Thomson
- Bio/Polymer Research Group, School of Biotechnology and Biomolecular Sciences; University of New South Wales; Sydney Australia
| | - L John R Foster
- Bio/Polymer Research Group, School of Biotechnology and Biomolecular Sciences; University of New South Wales; Sydney Australia
- Save Sight Institute, Faculty of Medicine; University of Sydney; Sydney Australia
| | - Winita Punyodom
- Department of Chemistry; Faculty of Science, Chiang Mai University; Chiang Mai Thailand
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Delaney AM, Adams CF, Fernandes AR, Al-Shakli AF, Sen J, Carwardine DR, Granger N, Chari DM. A fusion of minicircle DNA and nanoparticle delivery technologies facilitates therapeutic genetic engineering of autologous canine olfactory mucosal cells. NANOSCALE 2017; 9:8560-8566. [PMID: 28613324 DOI: 10.1039/c7nr00811b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Olfactory ensheathing cells (OECs) promote axonal regeneration and improve locomotor function when transplanted into the injured spinal cord. A recent clinical trial demonstrated improved motor function in domestic dogs with spinal injury following autologous OEC transplantation. Their utility in canines offers promise for human translation, as dogs are comparable to humans in terms of clinical management and genetic/environmental variation. Moreover, the autologous, minimally invasive derivation of OECs makes them viable for human spinal injury investigation. Genetic engineering of transplant populations may augment their therapeutic potential, but relies heavily on viral methods which have several drawbacks for clinical translation. We present here the first proof that magnetic particles deployed with applied magnetic fields and advanced DNA minicircle vectors can safely bioengineer OECs to secrete a key neurotrophic factor, with an efficiency approaching that of viral vectors. We suggest that our alternative approach offers high translational potential for the delivery of augmented clinical cell therapies.
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Affiliation(s)
- Alexander M Delaney
- Cellular and Neural Engineering Group, Institute for Science and Technology in Medicine, Keele University, Keele, Staffordshire ST5 5BG, UK.
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7
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Oprych K, Cotfas D, Choi D. Common olfactory ensheathing glial markers in the developing human olfactory system. Brain Struct Funct 2016; 222:1877-1895. [PMID: 27718014 PMCID: PMC5406434 DOI: 10.1007/s00429-016-1313-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Accepted: 09/14/2016] [Indexed: 12/14/2022]
Abstract
The in situ immunocytochemical properties of olfactory ensheathing cells (OECs) have been well studied in several small to medium sized animal models including rats, mice, guinea pigs, cats and canines. However, we know very little about the antigenic characteristics of OECs in situ within the adult and developing human olfactory bulb and nerve roots. To address this gap in knowledge we undertook an immunocytochemical analysis of the 11–19 pcw human foetal olfactory system. Human foetal OECs in situ possessed important differences compared to rodents in the expression of key surface markers. P75NTR was not observed in OECs but was strongly expressed by human foetal Schwann cells and perineurial olfactory nerve fibroblasts surrounding OECs. We define OECs throughout the 11–19 pcw human olfactory system as S100/vimentin/SOX10+ with low expression of GFAP. Our results suggest that P75NTR is a robust marker that could be utilised with cell sorting techniques to generate enriched OEC cultures by first removing P75NTR expressing Schwann cells and fibroblasts, and subsequently to isolate OECs after P75NTR upregulation in vitro. O4 and PSA-NCAM were not found to be suitable surface antigens for OEC purification owing to their ambiguous and heterogeneous expression. Our results highlight the importance of corroborating cell markers when translating cell therapies from animal models to the clinic.
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Affiliation(s)
- Karen Oprych
- Department of Brain, Repair and Rehabilitation, Institute of Neurology, University College London, Queen Square, London, WC1N 3BG, UK.
| | - Daniel Cotfas
- Department of Brain, Repair and Rehabilitation, Institute of Neurology, University College London, Queen Square, London, WC1N 3BG, UK
| | - David Choi
- Department of Brain, Repair and Rehabilitation, Institute of Neurology, University College London, Queen Square, London, WC1N 3BG, UK.,National Hospital for Neurology and Neurosurgery, Queen Square, London, WC1N 3BG, UK
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Hassarati RT, Marcal H, John L, Foster R, Green RA. Biofunctionalization of conductive hydrogel coatings to support olfactory ensheathing cells at implantable electrode interfaces. J Biomed Mater Res B Appl Biomater 2015; 104:712-22. [PMID: 26248597 DOI: 10.1002/jbm.b.33497] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Revised: 07/09/2015] [Accepted: 07/18/2015] [Indexed: 11/06/2022]
Abstract
Mechanical discrepancies between conventional platinum (Pt) electrodes and neural tissue often result in scar tissue encapsulation of implanted neural recording and stimulating devices. Olfactory ensheathing cells (OECs) are a supportive glial cell in the olfactory nervous system which can transition through glial scar tissue while supporting the outgrowth of neural processes. It has been proposed that this function can be used to reconnect implanted electrodes with the target neural pathways. Conductive hydrogel (CH) electrode coatings have been proposed as a substrate for supporting OEC survival and proliferation at the device interface. To determine an ideal CH to support OECs, this study explored eight CH variants, with differing biochemical composition, in comparison to a conventional Pt electrodes. All CH variants were based on a biosynthetic hydrogel, consisting of poly(vinyl alcohol) and heparin, through which the conductive polymer (CP) poly(3,4-ethylenedioxythiophene) was electropolymerized. The biochemical composition was varied through incorporation of gelatin and sericin, which were expected to provide cell adherence functionality, supporting attachment, and cell spreading. Combinations of these biomolecules varied from 1 to 3 wt %. The physical, electrical, and biological impact of these molecules on electrode performance was assessed. Cyclic voltammetry and electrochemical impedance spectroscopy demonstrated that the addition of these biological molecules had little significant effect on the coating's ability to safely transfer charge. Cell attachment studies, however, determined that the incorporation of 1 wt % gelatin in the hydrogel was sufficient to significantly increase the attachment of OECs compared to the nonfunctionalized CH.
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Affiliation(s)
- Rachelle T Hassarati
- Graduate School of Biomedical Engineering, UNSW Australia, Sydney, Australia.,Bio/polymers Research Group, School of Biotechnology and Biomolecular Sciences, UNSW Australia, Sydney, Australia
| | - Helder Marcal
- Topical Therapeutics Research Group, School of Medical Sciences, Faculty of Medicine, UNSW Australia, Sydney, Australia
| | - L John
- Bio/polymers Research Group, School of Biotechnology and Biomolecular Sciences, UNSW Australia, Sydney, Australia
| | - R Foster
- Bio/polymers Research Group, School of Biotechnology and Biomolecular Sciences, UNSW Australia, Sydney, Australia
| | - Rylie A Green
- Graduate School of Biomedical Engineering, UNSW Australia, Sydney, Australia
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