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Retina, transplantation

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https://www.readbyqxmd.com/read/28223209/langmuir-schaefer-film-deposition-onto-honeycomb-porous-films-for-retinal-tissue-engineering
#1
Maria Teresa Calejo, Tanja Ilmarinen, Elina Vuorimaa-Laukkanen, Elina Talvitie, Hanna M Hakola, Heli Skottman, Minna Kellomäki
: Age-related macular degeneration (AMD) is the leading cause of vision loss in senior citizens in the developed world. The disease is characterised by the degeneration of a specific cell layer at the back of the eye - the retinal pigment epithelium (RPE), which is essential in retinal function. The most promising therapeutic option to restore the lost vision is considered to be RPE cell transplantation. This work focuses on the development of biodegradable biomaterials with similar properties to the native Bruch's membrane as carriers for RPE cells...
February 18, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28220575/generation-of-storable-retinal-organoids-and-retinal-pigmented-epithelium-from-adherent-human-ips-cells-in-xeno-free-and-feeder-free-conditions
#2
Sacha Reichman, Amélie Slembrouck, Giuliana Gagliardi, Antoine Chaffiol, Angélique Terray, Céline Nanteau, Anais Potey, Morgane Belle, Oriane Rabesandratana, Jens Duebel, Gael Orieux, Emeline F Nandrot, José-Alain Sahel, Olivier Goureau
Human induced pluripotent stem cells (hiPSCs) are potentially useful in regenerative therapies for retinal disease. For medical applications, therapeutic retinal cells, such as retinal pigmented epithelial (RPE) cells or photoreceptor precursors, must be generated under completely defined conditions. To this purpose, we have developed a two-step xeno-free/feeder-free (XF/FF) culture system to efficiently differentiate hiPSCs into retinal cells. This simple method, relies only on adherent hiPSCs cultured in chemically defined media, bypassing embryoid body formation...
February 20, 2017: Stem Cells
https://www.readbyqxmd.com/read/28216299/hipsc-derived-retinal-ganglion-cells-grow-dendritic-arbors-and-functional-axons-on-a-tissue-engineered-scaffold
#3
Kangjun Li, Xiufeng Zhong, Sijing Yang, Ziming Luo, Kang Li, Ying Liu, Song Cai, Huaiyu Gu, Shoutao Lu, Haijun Zhang, Yantao Wei, Jing Zhuang, Yehong Zhuo, Zhigang Fan, Jian Ge
: 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, we reported on the induction of a self-organizing three-dimensional neural retina 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...
February 16, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28210901/transplantation-of-lineage-negative-stem-cells-in-pterygopalatine-artery-ligation-induced-retinal-ischemia-reperfusion-injury-in-mice
#4
Gillipsie Minhas, Sudesh Prabhakar, Ryuichi Morishita, Munehisa Shimamura, Reema Bansal, Akshay Anand
Retinal ischemia is a condition associated with retinal degenerative diseases such as glaucoma, diabetic retinopathy, and other optic neuropathies, leading to visual impairment and blindness worldwide. Currently, there is no therapy available for ischemic retinopathies. Therefore, the aim of this study was to test a murine model of pterygopalatine artery ligation-induced retinal injury for transplantation of mouse bone marrow-derived lineage-negative (lin-ve) stem cells. The mouse external carotid artery and pterygopalatine artery were ligated for 3...
February 16, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28205557/experimental-study-of-the-biological-properties-of-human-embryonic-stem-cell-derived-retinal-progenitor-cells
#5
Jingzhi Shao, Peng-Yi Zhou, Guang-Hua Peng
Retinal degenerative diseases are among the leading causes of blindness worldwide, and cell replacement is considered as a promising therapeutic. However, the resources of seed cells are scarce. To further explore this type of therapy, we adopted a culture system that could harvest a substantial quantity of retinal progenitor cells (RPCs) from human embryonic stem cells (hESCs) within a relatively short period of time. Furthermore, we transplanted these RPCs into the subretinal spaces of Royal College of Surgeons (RCS) rats...
February 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28199830/ipsc-derived-retina-transplants-improve-vision-in-rd1-end-stage-retinal-degeneration-mice
#6
Michiko Mandai, Momo Fujii, Tomoyo Hashiguchi, Genshiro A Sunagawa, Shin-Ichiro Ito, Jianan Sun, Jun Kaneko, Junki Sho, Chikako Yamada, Masayo Takahashi
No abstract text is available yet for this article.
February 14, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/28185609/olfactory-ensheathing-cells-inhibit-gliosis-in-retinal-degeneration-by-down-regulation-of-the-m%C3%A3-ller-cell-notch-signaling-pathway
#7
Jing Xie, Shujia Huo, Yijian Li, Jiaman Dai, Haiwei Xu, Zheng Qin Yin
Retinal regeneration and self-repair, whether in response to injury or degenerative disease, are severely impeded by glial scar formation by Müller cells (specialized retinal macroglia). We have previously demonstrated that the activation of Müller cells and gliosis in the degenerative retina are significantly suppressed by the subretinal transplantation of a mixture of olfactory ensheathing cells (OECs) and olfactory nerve fibroblasts. However, the underlying molecular mechanism has remained elusive. Here, we transplanted purified rat OECs into the subretinal space of pigmented Royal College of Surgeons (RCS) rats, a classic rodent model of retinal degeneration...
February 9, 2017: Cell Transplantation
https://www.readbyqxmd.com/read/28183612/controlled-surface-morphology-and-hydrophilicity-of-polycaprolactone-toward-human-retinal-pigment-epithelium-cells
#8
Saleheh Shahmoradi, Fatemeh Yazdian, Fatemeh Tabandeh, Zahra-Soheila Soheili, Ashraf Sadat Hatamian Zarami, Mona Navaei-Nigjeh
Applying scaffolds as a bed to enhance cell proliferation and even differentiation is one of the treatment of retina diseases such as age-related macular degeneration (AMD) which deteriorating photoreceptors and finally happening blindness. In this study, aligned polycaprolactone (PCL) nanofibers were electrospun and at different conditions and their characteristics were measured by scanning electron microscope (SEM) and contact angle. Response surface methodology (RSM) was used to optimize the diameter of fabricated nanofibers...
April 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28164440/effect-of-human-umbilical-cord-blood-mesenchymal-stem-cells-administered-by-intravenous-or-intravitreal-routes-on-cryo-induced-retinal-injury
#9
Eman M Mohamed, Shaimaa A Abdelrahman, Samia Hussein, Sally M Shalaby, Hala Mosaad, Ahmed M B Awad
Traumatic optic neuropathy is an important cause of severe vision loss. So, many attempts were performed to transplant stem cells systemically or locally to regenerate the injured retina. In this study, we investigated the effect of human umbilical cord blood mesenchymal stem cells (hUBMSCs) on histological structure, apoptotic, antiapoptotic, oxidant and antioxidant markers in an experimental model of cryo-induced retinal damage in mice. Forty-eight mice were included with 4 major groups; group I contained 18 mice as controls...
February 5, 2017: IUBMB Life
https://www.readbyqxmd.com/read/28155808/using-electrical-stimulation-to-enhance-the-efficacy-of-cell-transplantation-therapies-for-neurodegenerative-retinal-diseases-concepts-challenges-and-future-perspectives
#10
Abby Leigh Manthey, Wei Liu, Zhi Xin Jiang, Marcus Hiu Kong Lee, Jian Ji, Kwok-Fai So, Jimmy Shiu Ming Lai, Vincent Wing Hong Lee, Kin Chiu
Disease or trauma-induced loss or dysfunction of neurons in any central nervous system (CNS) tissue will have a significant impact on the health of the affected patient. The retina is a multilayered tissue that originates from the neuroectoderm, much like the brain and spinal cord. While sight is not required for life, neurodegeneration-related loss of vision not only affects the quality of life for the patient, but also has societal implications in terms of health care expenditure. Thus, it is essential to develop effective strategies to repair the retina and prevent disease symptoms...
February 3, 2017: Cell Transplantation
https://www.readbyqxmd.com/read/28149774/neuroprotective-effects-of-bdnf-and-gdnf-in-intravitreally-transplanted-mesenchymal-stem-cells-after-optic-nerve-crush-in-mice
#11
Zong-Li Hu, Ni Li, Xin Wei, Li Tang, Ting-Hua Wang, Xiao-Ming Chen
AIM: To assess the neuro-protective effect of bone marrow mesenchymal stem cells (BMSCs) on retinal ganglion cells (RGCs) following optic nerve crush in mice. METHODS: C56BL/6J mice were treated with intravitreal injection of PBS, BMSCs, BDNF-interference BMSCs (BIM), and GDNF-interference BMSCs (GIM) following optic nerve crush, respectively. The number of surviving RGCs was determined by whole-mount retinas and frozen sections, while certain mRNA or protein was detected by q-PCR or ELISA, respectively...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28143742/cone-genesis-tracing-by-the-chrnb4-egfp-mouse-line-evidences-of-cellular-material-fusion-after-cone-precursor-transplantation
#12
Sarah Decembrini, Catherine Martin, Florian Sennlaub, Sylvain Chemtob, Martin Biel, Marijana Samardzija, Alexandre Moulin, Francine Behar-Cohen, Yvan Arsenijevic
The cone function is essential to mediate high visual acuity, color vision, and daylight vision. Inherited cone dystrophies and age-related macular degeneration affect a substantial percentage of the world population. To identify and isolate the most competent cells for transplantation and integration into the retina, cone tracing during development would be an important added value. To that aim, the Chrnb4-EGFP mouse line was characterized throughout retinogenesis. It revealed a sub-population of early retinal progenitors expressing the reporter gene that is progressively restricted to mature cones during retina development...
January 28, 2017: Molecular Therapy: the Journal of the American Society of Gene Therapy
https://www.readbyqxmd.com/read/28129425/vision-recovery-and-connectivity-by-fetal-retinal-sheet-transplantation-in-an-immunodeficient-retinal-degenerate-rat-model
#13
Magdalene J Seiler, Robert E Lin, Bryce T McLelland, Anuradha Mathur, Bin Lin, Jaclyn Sigman, Alexander T De Guzman, Leonard M Kitzes, Robert B Aramant, Biju B Thomas
Purpose: To characterize a recently developed model, the retinal degenerate immunodeficient S334ter line-3 rat (SD-Foxn1 Tg(S334ter)3Lav) (RD nude rat), and to test whether transplanted rat fetal retinal sheets can elicit lost responses to light. Methods: National Institutes of Health nude rats (SD-Foxn1 Tg) with normal retina were compared to RD nude rats with and without transplant for morphology and visual function. Retinal sheets from transgenic rats expressing human placental alkaline phosphatase (hPAP) were transplanted into the subretinal space of RD nude rats between postnatal day (P) 26 and P38...
January 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28099524/role-of-myo-nog-cells-in-neuroprotection-evidence-from-the-light-damaged-retina
#14
Alice Brandli, Jacquelyn Gerhart, Christopher K Sutera, Sivaraman Purushothuman, Mindy George-Weinstein, Jonathan Stone, Arturo Bravo-Nuevo
PURPOSE: To identify Myo/Nog cells in the adult retina and test their role in protecting retinal photoreceptors from light damage. METHODS: Light damage was induced by exposing albino rats raised in dim cyclic light to 1000 lux light for 24 hours. In one group of rats, Myo/Nog cells were purified from rat brain tissue by magnetic cell sorting following binding of the G8 monoclonal antibody (mAb). These cells were injected into the vitreous humour of the eye within 2 hours following bright light exposure...
2017: PloS One
https://www.readbyqxmd.com/read/28089909/immunosuppression-via-loss-of-il2r%C3%AE-enhances-long-term-functional-integration-of-hesc-derived-photoreceptors-in-the-mouse-retina
#15
Jie Zhu, Helen Cifuentes, Joseph Reynolds, Deepak A Lamba
Loss of photoreceptors is a common endpoint in degenerative retinal diseases. Human pluripotent stem cells provide a potential source for photoreceptor replacement, but, even in mouse models, the efficiency and efficacy of transplantation-based repair remains poor. In this study, we examined the degree to which immune rejection contributes to these disappointing outcomes using an immunodeficient IL2 receptor γ (IL2rγ)-null mouse model. Our results show that prevention of cell rejection in the normal and degenerating retinal environment significantly improves long-term survival and integration of hESC-derived donor retinal cells...
December 29, 2016: Cell Stem Cell
https://www.readbyqxmd.com/read/28076757/ipsc-derived-retina-transplants-improve-vision-in-rd1-end-stage-retinal-degeneration-mice
#16
Michiko Mandai, Momo Fujii, Tomoyo Hashiguchi, Genshiro A Sunagawa, Shinichiro Ito, Jianan Sun, Jun Kaneko, Junki Sho, Chikako Yamada, Masayo Takahashi
Recent success in functional recovery by photoreceptor precursor transplantation in dysfunctional retina has led to an increased interest in using embryonic stem cell (ESC) or induced pluripotent stem cell (iPSC)-derived retinal progenitors to treat retinal degeneration. However, cell-based therapies for end-stage degenerative retinas that have lost the outer nuclear layer (ONL) are still a big challenge. In the present study, by transplanting mouse iPSC-derived retinal tissue (miPSC retina) in the end-stage retinal-degeneration model (rd1), we visualized the direct contact between host bipolar cell terminals and the presynaptic terminal of graft photoreceptors by gene labeling, showed light-responsive behaviors in transplanted rd1 mice, and recorded responses from the host retina with transplants by ex vivo micro-electroretinography and ganglion cell recordings using a multiple-electrode array system...
January 10, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/28038685/grafted-c-kit-ssea1-eye-wall-progenitor-cells-delay-retinal-degeneration-in-mice-by-regulating-neural-plasticity-and-forming-new-graft-to-host-synapses
#17
Xi Chen, Zehua Chen, Zhengya Li, Chen Zhao, Yuxiao Zeng, Ting Zou, Caiyun Fu, Xiaoli Liu, Haiwei Xu, Zheng Qin Yin
BACKGROUND: Despite diverse pathogenesis, the common pathological change observed in age-related macular degeneration and in most hereditary retinal degeneration (RD) diseases is photoreceptor loss. Photoreceptor replacement by cell transplantation may be a feasible treatment for RD. The major obstacles to clinical translation of stem cell-based cell therapy in RD remain the difficulty of obtaining sufficient quantities of appropriate and safe donor cells and the poor integration of grafted stem cell-derived photoreceptors into the remaining retinal circuitry...
December 30, 2016: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28028920/the-influence-of-substrate-modulus-on-retinal-pigment-epithelial-cells
#18
Corina White, Tyler DiStefano, Ronke Olabisi
Although transplantation of retinal pigment epithelial (RPE) cells has shown promise for the treatment of retinal degenerative diseases, this therapeutic approach is not without challenges. Two major challenges are RPE cell dedifferentiation and inflammatory response following transplantation. The aim of this work is to understand how the rigidity of a scaffold, a relatively unexplored design aspect in retinal tissue engineering, affects RPE cells, particularly the pathways associated with the aforementioned challenges...
December 28, 2016: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28003788/multimodal-imaging-of-membranoproliferative-glomerulonephritis-type-ii
#19
Zafer Cebeci, Serife Bayraktar, Merih Oray, Nur Kir
To report the fundus findings on multimodal imaging of a membranoproliferative glomerulonephritis type II (MPGNII) patient. A 41-year-old woman had a medical history of renal transplantation for MPGNII 5 years prior to presentation to our clinic for ophthalmic examination. Fundus examination showed macular retinal pigment epithelial changes and large peripapillary atrophy in the right eye, and yellowish bilateral drusen-like deposits peripherally. Fundus fluorescein angiography and indocyanine green angiography revealed multifocal hyperfluorescence in the peripheral retina with accompanying deposits...
October 2016: Saudi Journal of Ophthalmology: Official Journal of the Saudi Ophthalmological Society
https://www.readbyqxmd.com/read/28002569/protective-role-of-icos-and-icos-ligand-in-corneal-transplantation-and-in-maintenance-of-immune-privilege
#20
Tomoyuki Kunishige, Hiroko Taniguchi, Misao Terada, Hisaya Akiba, Hideo Yagita, Ryo Abe, Junko Hori
Purpose: The interaction between the inducible costimulatory molecule (ICOS) and ICOS ligand (ICOSL) has been implicated in the differentiation and functions of T cells. The purpose of the present study was to determine the role of ICOS-ICOSL in the immune privilege of corneal allografts. Methods: Expression of ICOS and ICOSL mRNA from mouse eyes was assessed by RT-PCR. Corneas of C57BL/6 mice were orthotopically transplanted into the eyes of ICOS-/- BALB/c recipients and BALB/c wild-type (WT) recipients treated with anti-ICOSL mAb, and graft survival was assessed...
December 1, 2016: Investigative Ophthalmology & Visual Science
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