keyword
MENU ▼
Read by QxMD icon Read
search

Retina, stem cells

keyword
https://www.readbyqxmd.com/read/28437526/prominin-1-is-a-novel-regulator-of-autophagy-in-the-human-retinal-pigment-epithelium
#1
Sujoy Bhattacharya, Jinggang Yin, Christina S Winborn, Qiuhua Zhang, Junming Yue, Edward Chaum
Purpose: Prominin-1 (Prom1) is a transmembrane glycoprotein, which is expressed in stem cell lineages, and has recently been implicated in cancer stem cell survival. Mutations in the Prom1 gene have been shown to disrupt photoreceptor disk morphogenesis and cause an autosomal dominant form of Stargardt-like macular dystrophy (STGD4). Despite the apparent structural role of Prom1 in photoreceptors, its role in other cells of the retina is unknown. The purpose of this study is to investigate the role of Prom1 in the highly metabolically active cells of the retinal pigment epithelium (RPE)...
April 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28433627/docosahexaenoic-acid-promotes-differentiation-of-photoreceptor-cells-in-three-dimensional-neural-retinas
#2
Eisuke Arai, Vipul M Parmar, Bhubanananda Sahu, Lindsay Perusek, Tanu Parmar, Akiko Maeda
Retinal tissues generated from human pluripotent stem cells can be an excellent tool for investigating pathogenesis of retinal diseases and developing new pharmacologic therapies. Moreover, patient derived retinal tissues could allow for retinal transplantation therapy for degenerative retinal diseases. However, obtaining retinal tissues with matured photoreceptor outer segments, which are essential for photoreceptor functions, is currently challenging. Here we investigated the effects of docosahexaenoic acid (DHA) for maturation of photoreceptor outer segments at the late stage and visual chromophore analog, 9-cis-retinal for the early stage of differentiation to three-dimensional (3D)-retinal tissues from human embryonic stem cells (hESCs), respectively...
April 19, 2017: Neuroscience Research
https://www.readbyqxmd.com/read/28424578/the-crb1-complex-following-the-trail-of-crumbs-to-a-feasible-gene-therapy-strategy
#3
REVIEW
Peter M Quinn, Lucie P Pellissier, Jan Wijnholds
Once considered science fiction, gene therapy is rapidly becoming scientific reality, targeting a growing number of the approximately 250 genes linked to hereditary retinal disorders such as retinitis pigmentosa and Leber's congenital amaurosis. Powerful new technologies have emerged, leading to the development of humanized models for testing and screening these therapies, bringing us closer to the goal of personalized medicine. These tools include the ability to differentiate human induced pluripotent stem cells (iPSCs) to create a "retina-in-a-dish" model and the self-formed ectodermal autonomous multi-zone, which can mimic whole eye development...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28416692/immunomodulation-accelerated-neuronal-regeneration-following-selective-rod-photoreceptor-cell-ablation-in-the-zebrafish-retina
#4
David T White, Sumitra Sengupta, Meera T Saxena, Qingguo Xu, Justin Hanes, Ding Ding, Hongkai Ji, Jeff S Mumm
Müller glia (MG) function as inducible retinal stem cells in zebrafish, completely repairing the eye after damage. The innate immune system has recently been shown to promote tissue regeneration in which classic wound-healing responses predominate. However, regulatory roles for leukocytes during cellular regeneration-i.e., selective cell-loss paradigms akin to degenerative disease-are less well defined. To investigate possible roles innate immune cells play during retinal cell regeneration, we used intravital microscopy to visualize neutrophil, macrophage, and retinal microglia responses to induced rod photoreceptor apoptosis...
April 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28411269/novel-regulatory-mechanisms-for-the-soxc-transcriptional-network-required-for-visual-pathway-development
#5
Kun-Che Chang, Jonathan Hertz, Xiong Zhang, Xiao-Lu Jin, Peter Shaw, Brooke A Derosa, Janet Y Li, Praseeda Venugopalan, Daniel A Valenzuela, Roshni D Patel, Kristina R Russano, Shomoukh A Alshamekh, Catalina Sun, Kevin Tenerelli, Chenyi Li, Dmitri Velmeshev, Yuyan Cheng, Timothy M Boyce, Alexandra Dreyfuss, Mohammed S Uddin, Kenneth J Muller, Derek M Dykxhoorn, Jeffrey L Goldberg
What pathways specify retinal ganglion cell (RGC) fate in the developing retina? Here we report on mechanisms by which a molecular pathway involving Sox4/Sox11 is required for RGC differentiation and for optic nerve formation in mice in vivo, and is sufficient to differentiate human induced pluripotent stem cells into electrophysiologically active RGCs. These data place Sox4 downstream of RE1 silencing transcription factor (REST) in regulating RGC fate, and further describe a newly identified, Sox4-regulated SUMOylation site in Sox11, which suppresses Sox11's nuclear localization and its ability to promote RGC differentiation, providing a mechanism for the SoxC familial compensation observed here and elsewhere in the nervous system...
April 14, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28400789/the-promise-of-stem-cell-based-therapeutics-in-ophthalmology
#6
REVIEW
Israel Aharony, Shalom Michowiz, Nitza Goldenberg-Cohen
The promising role of cellular therapies in the preservation and restoration of visual function has prompted intensive efforts to characterize embryonic, adult, and induced pluripotent stem cells for regenerative purposes. Three main approaches to the use of stem cells have been described: sustained drug delivery, immunomodulation, and differentiation into various ocular structures. Studies of the differentiation capacity of all three types of stem cells into epithelial, neural, glial and vascular phenotypes have reached proof-of-concept in culture, but the correction of vision is still in the early developmental stages, and the requirements for effective in vivo implementation are still unclear...
February 2017: Neural Regeneration Research
https://www.readbyqxmd.com/read/28396597/photoreceptor-outer-segment-like-structures-in-long-term-3d-retinas-from-human-pluripotent-stem-cells
#7
Karl J Wahlin, Julien A Maruotti, Srinivasa R Sripathi, John Ball, Juan M Angueyra, Catherine Kim, Rhonda Grebe, Wei Li, Bryan W Jones, Donald J Zack
The retinal degenerative diseases, which together constitute a leading cause of hereditary blindness worldwide, are largely untreatable. Development of reliable methods to culture complex retinal tissues from human pluripotent stem cells (hPSCs) could offer a means to study human retinal development, provide a platform to investigate the mechanisms of retinal degeneration and screen for neuroprotective compounds, and provide the basis for cell-based therapeutic strategies. In this study, we describe an in vitro method by which hPSCs can be differentiated into 3D retinas with at least some important features reminiscent of a mature retina, including exuberant outgrowth of outer segment-like structures and synaptic ribbons, photoreceptor neurotransmitter expression, and membrane conductances and synaptic vesicle release properties consistent with possible photoreceptor synaptic function...
April 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28390992/patient-specific-induced-pluripotent-stem-cells-to-evaluate-the-pathophysiology-of-trnt1-associated-retinitis-pigmentosa
#8
Tasneem P Sharma, Luke A Wiley, S Scott Whitmore, Kristin R Anfinson, Cathryn M Cranston, Douglas J Oppedal, Heather T Daggett, Robert F Mullins, Budd A Tucker, Edwin M Stone
Retinitis pigmentosa (RP) is a heterogeneous group of monogenic disorders characterized by progressive death of the light-sensing photoreceptor cells of the outer neural retina. We recently identified novel hypomorphic mutations in the tRNA Nucleotidyl Transferase, CCA-Adding 1 (TRNT1) gene that cause early-onset RP. To model this disease in vitro, we generated patient-specific iPSCs and iPSC-derived retinal organoids from dermal fibroblasts of patients with molecularly confirmed TRNT1-associated RP. Pluripotency was confirmed using rt-PCR, immunocytochemistry, and a TaqMan Scorecard Assay...
March 18, 2017: Stem Cell Research
https://www.readbyqxmd.com/read/28372274/stem-cell-roadmap%C3%A2-the-industrial-point-of%C3%A2-view
#9
Mazen Elzaabi, Agnès Thevenin, Pierre-Noël Lirsac
CELLforCURE is a French Contract Development and Manufacturing Organization (CDMO) dedicated to industrialization and process development for routine manufacturing, GMP manufacturing for clinical and commercial batches and regulatory services and associated logistics. CELLforCURE is a subsidiary of LFB Group.Stem cells fields of application gather cell and gene therapy as well as tissue engineering. According to VisionGain survey, cell therapy medicinal products will remain predominant in the future.Clinical trials are sponsored either by universities or private companies...
2017: Bio-medical Materials and Engineering
https://www.readbyqxmd.com/read/28371543/upregulation-of-matrix-metalloproteinase-triggers-transdifferentiation-of-retinal-pigmented-epithelial-cells-in-xenopus-laevis-a-link-between-inflammatory-response-and-regeneration
#10
Hanako Naitoh, Yukari Suganuma, Yoko Ueda, Takahiko Sato, Yosuke Hiramuki, Atsuko Fujisawa-Sehara, Shigeru Taketani, Masasuke Araki
In adult Xenopus eyes, when the whole retina is removed, retinal pigmented epithelial (RPE) cells become activated to be retinal stem cells and regenerate the whole retina. In the present study, using a tissue culture model, we examined whether upregulation of matrix metalloproteinases (Mmps) triggers retinal regeneration. Soon after retinal removal, Xmmp9 and Xmmp18 were strongly upregulated in the tissues of the RPE and the choroid. In the culture, Mmp expression in the RPE cells corresponded with their migration from the choroid...
April 2, 2017: Developmental Neurobiology
https://www.readbyqxmd.com/read/28361307/generation-of-a-three-dimensional-retinal-tissue-from-self-organizing-human-esc-culture
#11
Atsushi Kuwahara, Tokushige Nakano, Mototsugu Eiraku
A three-dimensional (3D) tissue generated in vitro is a promising source to study developmental biology and regenerative medicine. In the last decade, Yoshiki Sasai's group have developed a 3D stem cell culture technique known as SFEBq and demonstrated that embryonic stem cells (ESCs) have an ability to self-organize stratified neural tissue including 3D-retina. Furthermore, we have reported that ESC-derived retinal tissue can form an optic cup and a ciliary margin, which are unique structures in the developing retina...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28355662/-photoreceptor-transplantation-into-the-degenerative-retina
#12
O Borsch, T Santos-Ferreira, M Ader
Vision impairment and blindness due to photoreceptor loss represents one of the major causes for disability in industrialized societies. Whereas rod photoreceptors allow vision under dim light conditions, cone photoreceptors provide high-acuity vision in daylight conditions and color detection. Several therapeutic strategies are currently developed to repair vision loss, including cell-based interventions. Within the last decade, major progress regarding the replacement of photoreceptors by transplantation has been made in pre-clinical animal models...
March 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/28351499/retina-tissue-engineering-by-conjunctiva-mesenchymal-stem-cells-encapsulated-in-fibrin-gel-hypotheses-on-novel-approach-to-retinal-diseases-treatment
#13
Mostafa Soleimannejad, Somayeh Ebrahimi-Barough, Samad Nadri, Mohammad Riazi-Esfahani, Masoud Soleimani, Seyed Mohammad Tavangar, Jafar Ai
BACKGROUND: Retinitis pigmentosa (RP) and age related macular degeneration (AMD) are two retinal diseases that progress by photoreceptor cells death. In retinal transplantation studies, stem and progenitor cells inject into the sub retinal space or vitreous and then these cells can be migrate to the site of retinal degeneration and locate in the host retina and restitute vision. PRESENTATION OF THE HYPOTHESIS: Our hypothesis suggests that using human conjunctiva stem cells (as the source for increasing the number of human stem cells progenitor cells in retina dysfunction diseases) with fibrin gel and also assessing its relating in vitro (cellular and molecular processes) and in vivo (vision tests and pathology) could be a promising strategy for treatment of AMD and RP disorders...
April 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28298640/combined-transplantation-of-human-mesenchymal-stem-cells-and-human-retinal-progenitor-cells-into-the-subretinal-space-of-rcs-rats
#14
Linghui Qu, Lixiong Gao, Haiwei Xu, Ping Duan, Yuxiao Zeng, Yong Liu, Zheng Qin Yin
Retinitis pigmentosa (RP) is one of hereditary retinal diseases characterized by the loss of photoreceptors. Cell transplantation has been clinically applied to treat RP patients. Human retinal progenitor cells (HRPCs) and human bone marrow-derived mesenchymal stem cells (HBMSCs) are the two commonly and practically used stem cells for transplantation. Since combined transplantation could be a promising way to integrate the advantages of both stem cell types, we transplanted HRPCs and HBMSCs into the subretinal space (SRS) of Royal College of Surgeons (RCS) rats...
March 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28296613/autologous-induced-stem-cell-derived-retinal-cells-for-macular-degeneration
#15
Michiko Mandai, Akira Watanabe, Yasuo Kurimoto, Yasuhiko Hirami, Chikako Morinaga, Takashi Daimon, Masashi Fujihara, Hiroshi Akimaru, Noriko Sakai, Yumiko Shibata, Motoki Terada, Yui Nomiya, Shigeki Tanishima, Masahiro Nakamura, Hiroyuki Kamao, Sunao Sugita, Akishi Onishi, Tomoko Ito, Kanako Fujita, Shin Kawamata, Masahiro J Go, Chikara Shinohara, Ken-Ichiro Hata, Masanori Sawada, Midori Yamamoto, Sachiko Ohta, Yasuo Ohara, Kenichi Yoshida, Junko Kuwahara, Yuko Kitano, Naoki Amano, Masafumi Umekage, Fumiyo Kitaoka, Azusa Tanaka, Chihiro Okada, Naoko Takasu, Seishi Ogawa, Shinya Yamanaka, Masayo Takahashi
We assessed the feasibility of transplanting a sheet of retinal pigment epithelial (RPE) cells differentiated from induced pluripotent stem cells (iPSCs) in a patient with neovascular age-related macular degeneration. The iPSCs were generated from skin fibroblasts obtained from two patients with advanced neovascular age-related macular degeneration and were differentiated into RPE cells. The RPE cells and the iPSCs from which they were derived were subject to extensive testing. A surgery that included the removal of the neovascular membrane and transplantation of the autologous iPSC-derived RPE cell sheet under the retina was performed in one of the patients...
March 16, 2017: New England Journal of Medicine
https://www.readbyqxmd.com/read/28258388/smad7-deficiency-stimulates-m%C3%A3-ller-progenitor-cell-proliferation-during-the-development-of-the-mammalian-retina
#16
Martina Kugler, Anja Schlecht, Rudolf Fuchshofer, Sabrina I Schmitt, Ingo Kleiter, Ludwig Aigner, Ernst R Tamm, Barbara M Braunger
The transforming growth factor-β (TGF-β) pathway contributes to maintain the quiescence of adult neural stem and progenitor cells in the brain. In the retina, Müller cells are discussed to represent a glial cell population with progenitor-like characteristics. Here, we aimed to investigate if elevated TGF-β signaling modulates the proliferation of Müller cells during retinal development. We generated mutant mice with a systemic, heterozygous up-regulation of TGF-β signaling by deleting its inhibitor SMAD7...
March 3, 2017: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/28255307/overexpression-of-heme-oxygenase-1-in-mesenchymal-stem-cells-augments-their-protection-on-retinal-cells-in-vitro-and-attenuates-retinal-ischemia-reperfusion-injury-in-vivo-against-oxidative-stress
#17
Li Li, GaiPing Du, DaJiang Wang, Jin Zhou, Guomin Jiang, Hua Jiang
Retinal ischemia/reperfusion (I/R) injury, involving several ocular diseases, seriously threatens human ocular health, mainly treated by attenuating I/R-induced oxidative stress. Currently, mesenchymal stem cells (MSCs) could restore I/R-injured retina through paracrine secretion. Additionally, heme oxygenase-1 (HO-1) could ameliorate oxidative stress and thus retinal apoptosis, but the expression of HO-1 in MSC is limited. Here, we hypothesized that overexpression of HO-1 in MSC (MSC-HO-1) may significantly improve their retina-protective potentials...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28249091/subretinal-glial-membranes-in-eyes-with-geographic-atrophy
#18
Malia M Edwards, D Scott McLeod, Imran A Bhutto, Rhonda Grebe, Maeve Duffy, Gerard A Lutty
Purpose: Müller cells create the external limiting membrane (ELM) by forming junctions with photoreceptor cells. This study evaluated the relationship between focal photoreceptors and RPE loss in geographic atrophy (GA) and Müller cell extension into the subretinal space. Methods: Human donor eyes with no retinal disease or geographic atrophy (GA) were fixed and the eye cups imaged. The retinal posterior pole was stained for glial fibrillary acidic protein (GFAP; astrocytes and activated Müller cells) and vimentin (Müller cells) while the submacular choroids were labeled with Ulex Europaeus Agglutinin lectin (blood vessels)...
March 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28246397/relationship-between-somatic-mosaicism-of-pax6-mutation-and-variable-developmental-eye-abnormalities-an-analysis-of-crispr-genome-edited-mouse-embryos
#19
Akihiro Yasue, Hitomi Kono, Munenori Habuta, Tetsuya Bando, Keita Sato, Junji Inoue, Seiichi Oyadomari, Sumihare Noji, Eiji Tanaka, Hideyo Ohuchi
The clustered regularly interspaced short palindromic repeat (CRISPR)/CRISPR-associated protein (Cas) system is a rapid gene-targeting technology that does not require embryonic stem cells. To demonstrate dosage effects of the Pax6 gene on eye formation, we generated Pax6-deficient mice with the CRISPR/Cas system. Eyes of founder embryos at embryonic day (E) 16.5 were examined and categorized according to macroscopic phenotype as class 1 (small eye with distinct pigmentation), class 2 (pigmentation without eye globes), or class 3 (no pigmentation and no eyes)...
December 2017: Scientific Reports
https://www.readbyqxmd.com/read/28242480/bifacial-stem-cell-niches-in-fish-and-plants
#20
REVIEW
Dongbo Shi, Tinatini Tavhelidse, Thomas Thumberger, Joachim Wittbrodt, Thomas Greb
Embryonic development is key for determining the architecture and shape of multicellular bodies. However, most cells are produced postembryonically in, at least partly, differentiated organs. In this regard, organismal growth faces common challenges in coordinating expansion and function of body structures. Here we compare two examples for postembryonic growth processes from two different kingdoms of life to reveal common regulatory principles: lateral growth of plants and the enlargement of the fish retina...
February 24, 2017: Current Opinion in Genetics & Development
keyword
keyword
16464
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"