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https://www.readbyqxmd.com/read/27906070/subretinal-adipose-tissue-derived-mesenchymal-stem-cell-implantation-in-advanced-stage-retinitis-pigmentosa-a-phase-i-clinical-safety-study
#1
Ayse Oner, Z Burcin Gonen, Neslihan Sinim, Mustafa Cetin, Yusuf Ozkul
BACKGROUND: This prospective clinical case series aimed to investigate the safety of subretinal adipose tissue-derived mesenchymal stem cell (ADMSC) implantation in advanced stage retinitis pigmentosa (RP). METHODS: This study included 11 patients with end-stage RP who received subretinal implantation of ADMSCs. All patients had a total visual field defect and five of them only had light perception. The best corrected visual acuity (BCVA) in the study was 20/2000...
December 1, 2016: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/27905547/in-silico-mapping-of-protein-unfolding-mutations-for-inherited-disease
#2
Caitlyn L McCafferty, Yuri V Sergeev
The effect of disease-causing missense mutations on protein folding is difficult to evaluate. To understand this relationship, we developed the unfolding mutation screen (UMS) for in silico evaluation of the severity of genetic perturbations at the atomic level of protein structure. The program takes into account the protein-unfolding curve and generates propensities using calculated free energy changes for every possible missense mutation at once. These results are presented in a series of unfolding heat maps and a colored protein 3D structure to show the residues critical to the protein folding and are available for quick reference...
December 1, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27905344/concurrent-retinitis-pigmentosa-and-pigmented-paravenous-retinochoroidal-atrophy-phenotypes-in-the-same-patient
#3
Dhanashree Ratra, Dhileesh P Chandrasekharan, P Aruldas, Vineet Ratra
We report a unique case of a patient with retinitis pigmentosa (RP) phenotype in one eye and pigmented paravenous retinochoroidal atrophy (PPRCA) phenotype in the other eye. We describe in detail the symptoms, clinical findings, and investigations done for a 32-year-old Indian woman. This patient had phenotypical picture resembling typical RP in the right eye, with characteristic symptoms of night blindness and constricted field of vision and a nonrecordable electroretinogram (ERG). The left eye of the same patient revealed typical PPRCA phenotype, with no night blindness, normal field, and normal ERG...
October 2016: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/27904945/-sarcoidosis-and-uveitis-an-update
#4
REVIEW
J G Garweg
Ocular involvement in sarcoidosis is present in up to one third of patients and is frequently manifested before the underlying systemic disease has been diagnosed. With a view to the therapeutic consequences an early diagnosis of the underlying disease is advantageous. In cases of visual loss early diagnostic measures include invasive procedures, such as ultrasound-guided bronchoalveolar lavage and transbronchial biopsy, if nodular conjunctival or cutaneous manifestations which would confirm the diagnosis are not present...
November 30, 2016: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
https://www.readbyqxmd.com/read/27904503/stem-cell-ophthalmology-treatment-study-scots-bone-marrow-derived-stem-cells-in-the-treatment-of-leber-s-hereditary-optic-neuropathy
#5
Jeffrey N Weiss, Steven Levy, Susan C Benes
The Stem Cell Ophthalmology Treatment Study (SCOTS) is currently the largest-scale stem cell ophthalmology trial registered at ClinicalTrials.gov (identifier: NCT01920867). SCOTS utilizes autologous bone marrow-derived stem cells (BMSCs) to treat optic nerve and retinal diseases. Treatment approaches include a combination of retrobulbar, subtenon, intravitreal, intra-optic nerve, subretinal, and intravenous injection of autologous BMSCs according to the nature of the disease, the degree of visual loss, and any risk factors related to the treatments...
October 2016: Neural Regeneration Research
https://www.readbyqxmd.com/read/27904478/neuro-rejuvenation-for-neuronal-function
#6
REVIEW
Yuan Liu, Richard K Lee
Neurodegenerative eye diseases, such as glaucoma, cause irreversible vision loss in millions of patients worldwide, creating serious medical, economic and social issues. Like other mammalian central nervous system tracts, optic nerve intrinsically lacks the capacity for axonal growth and its surrounding environment is also non-permissive to regeneration. Any axonal damage also triggers a vicious cycle of retinal ganglion cell (RGC) death. Exploring methods that can enhance RGCs survival and promote axonal regeneration will not only enable vision restoration for millions of patients, but also shed light on the treatment of other neurodegenerative diseases...
October 2016: Neural Regeneration Research
https://www.readbyqxmd.com/read/27904477/axon-injury-induced-endoplasmic-reticulum-stress-and-neurodegeneration
#7
REVIEW
Yang Hu
Injury to central nervous system axons is a common early characteristic of neurodegenerative diseases. Depending on its location and the type of neuron, axon injury often leads to axon degeneration, retrograde neuronal cell death and progressive permanent loss of vital neuronal functions. Although these sequential events are clearly connected, ample evidence indicates that neuronal soma and axon degenerations are active autonomous processes with distinct molecular mechanisms. By exploiting the anatomical and technical advantages of the retinal ganglion cell (RGC)/optic nerve (ON) system, we demonstrated that inhibition of the PERK-eIF2α-CHOP pathway and activation of the X-box binding protein 1 pathway synergistically protect RGC soma and axon, and preserve visual function, in both acute ON traumatic injury and chronic glaucomatous neuropathy...
October 2016: Neural Regeneration Research
https://www.readbyqxmd.com/read/27904033/impact-of-slc6a-transporters-in-physiological-taurine-transport-at-the-blood-retinal-barrier-and-in-the-liver
#8
Yoshiyuki Kubo, Shin-Ichi Akanuma, Ken-Ichi Hosoya
Cumulative studies showed that taurine (2-aminoethanesulfonic acid) contributes to a variety of physiological events. Transport study suggested the cellular taurine transport in an Na(+)- and Cl(-)-dependent manner, and the several members of SLC6A family have been shown as taurine transporter. At the inner blood-retinal barrier (BRB), taurine transporter (TauT/SLC6A) is involved in the transport of taurine to the retina from the circulating blood. The involvement of TauT is also suggested in γ-aminobutyric acid (GABA) transport at the inner BRB, and its role is assumed in the elimination of GABA from the retinal interstitial fluid...
2016: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/27904027/retinal-vascular-changes-and-prospective-risk-of-disabling-dementia-the-circulatory-risk-in-communities-study-circs
#9
Hiroshige Jinnouchi, Akihiko Kitamura, Kazumasa Yamagishi, Masahiko Kiyama, Hironori Imano, Takeo Okada, Renzhe Cui, Mitsumasa Umesawa, Isao Muraki, Mina Hayama-Terada, Ryo Kawasaki, Tomoko Sankai, Tetsuya Ohira, Hiroyasu Iso
AIM: To investigate the association of retinal vascular changes with a risk of dementia in longitudinal population-based study. METHODS: We performed a nested case-control study of 3,718 persons, aged 40-89 years, enrolled between 1983 and 2004. Retinal vascular changes were observed in 351 cases with disabling dementia (average period before the onset, 11.2 years) and in 702 controls matched for sex, age, and baseline year. Incidence of disabling dementia was defined as individuals who received cares for disabilities including dementia-related symptoms and/or behavioral disturbance...
December 1, 2016: Journal of Atherosclerosis and Thrombosis
https://www.readbyqxmd.com/read/27903733/development-of-activity-in-the-mouse-visual-cortex
#10
Jing Shen, Matthew T Colonnese
: A comprehensive developmental timeline of activity in the mouse cortex in vivo is lacking. Understanding the activity changes that accompany synapse and circuit formation is important to understand the mechanisms by which activity molds circuits and would help to identify critical checkpoints for normal development. To identify key principles of cortical activity maturation, we systematically tracked spontaneous and sensory-evoked activity with extracellular recordings of primary visual cortex (V1) in nonanesthetized mice...
November 30, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27903729/joint-encoding-of-object-motion-and-motion-direction-in-the-salamander-retina
#11
Norma Krystyna Kühn, Tim Gollisch
: The processing of motion in visual scenes is important for detecting and tracking moving objects as well as for monitoring self-motion through the induced optic flow. Specialized neural circuits have been identified in the vertebrate retina for detecting motion direction or for distinguishing between object motion and self-motion, although little is known about how information about these distinct features of visual motion is combined. The salamander retina, which is a widely used model system for analyzing retinal function, contains object-motion-sensitive (OMS) ganglion cells, which strongly respond to local motion signals but are suppressed by global image motion...
November 30, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27903703/retinal-and-non-retinal-contributions-to-extraclassical-surround-suppression-in-the-lateral-geniculate-nucleus
#12
Tucker G Fisher, Henry J Alitto, W Martin Usrey
: Extraclassical surround suppression is a prominent receptive field property of neurons in the lateral geniculate nucleus (LGN) of the dorsal thalamus, influencing stimulus size tuning, response gain control, and temporal features of visual responses. Despite evidence for the involvement of both retinal and non-retinal circuits in the generation of extraclassical suppression, we lack an understanding of the relative roles played by these pathways and how they interact during visual stimulation...
November 30, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27903636/spatiotopic-maps-during-dynamic-head-tilt
#13
Kyriaki Mikellidou, Marco Turi, David Charles Burr
Humans maintain a stable representation of the visual world effortlessly, despite constant movements of the eyes, head and body, across multiple planes. Whereas visual stability in the face of saccadic eye-movements has been intensely researched, fewer studies have investigated retinal image transformations induced by head movements, especially in the frontal plane. Unlike head rotations in the horizontal and sagittal planes, tilting the head in the frontal plane is only partially counteracted by torsional eye-movements, and consequently induces a distortion of the retinal image to which we seem to be completely oblivious...
November 30, 2016: Journal of Neurophysiology
https://www.readbyqxmd.com/read/27903184/microinvasive-tumor-endoresection-in-combination-with-ocular-stereotactic-radiosurgery
#14
Oleg A Sinyavskiy, Roman L Troyanovsky, Pavel I Ivanov, Alexandr S Golovin, Andrey V Tibilov, Svetlana N Solonina, Anna M Astapenko, Irina S Zubatkina
OBJECTIVE The use of Gamma Knife radiosurgery (GKRS) as monotherapy in the treatment of uveal melanoma (UM) allows clinicians to achieve high local tumor control with low recurrence but does not prevent secondary enucleation due to glaucoma in cases of large tumors. The authors analyzed indications for tumor endoresection (ER), the time interval between irradiation and surgery, and the features and results of performing ER for UM after GKRS. METHODS Thirty-seven patients between 28 and 78 years of age (16 male and 11 female patients) with UM underwent GKRS with a dose of 70 to 80 Gy that was applied to the center of the tumor with complete immobilization of the eye during the procedure...
December 2016: Journal of Neurosurgery
https://www.readbyqxmd.com/read/27903073/comparison-between-early-or-late-intravitreal-injection-of-dexamethasone-implant-in-branch-brvo-or-central-crvo-retinal-vein-occlusion-six-months-follow-up
#15
Fernanda Pacella, Giuseppe La Torre, Stefania Basili, Monica Autolitano, Antonella Pascarella, Tommaso Lenzi, Elena Pacella
PURPOSE: The purpose of this study was to compare early and late injections of intravitreal dexamethasone implant in patients affected by central retinal vein occlusion (CRVO) or branch retinal vein occlusion (BRVO) with a six-month follow-up. We assessed whether an earlier treatment start (within 7 days from diagnosis) could be more beneficial than a delayed (or late) treatment start (after 7 days). MATERIALS AND METHODS: The study included 81 patients (81 eyes) affected by retinal vein occlusion...
November 30, 2016: Cutaneous and Ocular Toxicology
https://www.readbyqxmd.com/read/27902677/perception-of-fechner-illusory-colors-in-alzheimer-disease-patients
#16
Gintaras Kaubrys, Vera Bukina, Ieva Bingelytė, Vladas Taluntis
BACKGROUND Alzheimer disease (AD) primarily affects cognition. A variety of visual disorders was established in AD. Fechner illusory colors are produced by a rotating disk with a black and white pattern. The purpose of our research was to explore the perception of illusory colors in AD. MATERIAL AND METHODS W recruited 40 AD patients (MMSE ≥14) and 40 normal controls (CG group) matched by age, education, gender in this prospective, cross-sectional, case-control study. An achromatic Benham's disk attached to a device to control the speed and direction of rotation was used to produce illusory colors...
November 30, 2016: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/27902640/minimal-endoillumination-levels-and-display-luminous-emittance-during-three-dimensional-heads-up-vitreoretinal-surgery
#17
Murtaza K Adam, Sarah Thornton, Carl D Regillo, Carl Park, Allen C Ho, Jason Hsu
PURPOSE: To determine minimal endoillumination levels required to perform 3-dimensional heads-up vitreoretinal surgery and to correlate endoillumination levels used for measurements of heads-up display (HUD) luminous emittance. METHODS: Prospective, observational surgical case series of 10 patients undergoing vitreoretinal surgery. Endoillumination levels were set to 40% of maximum output and were decreased at set intervals until the illumination level was 0%. Corresponding luminous emittance (lux) of the HUD was measured 40 cm from the display using a luxmeter (Dr...
November 29, 2016: Retina
https://www.readbyqxmd.com/read/27902638/the-pathophysiology-of-geographic-atrophy-secondary-to-age-related-macular-degeneration-and-the-complement-pathway-as-a-therapeutic-target
#18
David S Boyer, Ursula Schmidt-Erfurth, Menno van Lookeren Campagne, Erin C Henry, Christopher Brittain
PURPOSE: Geographic atrophy (GA) is an advanced, vision-threatening form of age-related macular degeneration (AMD) affecting approximately five million individuals worldwide. To date, there are no approved therapeutics for GA treatment; however, several are in clinical trials. This review focuses on the pathophysiology of GA, particularly the role of complement cascade dysregulation and emerging therapies targeting the complement cascade. METHODS: Primary literature search on PubMed for GA, complement cascade in age-related macular degeneration...
November 29, 2016: Retina
https://www.readbyqxmd.com/read/27902541/central-serous-chorioretinopathylike-mimicking-multifocal-vitelliform-macular-dystrophy-an-ocular-side-effect-of-mitogen-extracellular-signal-regulated-kinase-inhibitors
#19
Chiara Giuffrè, Elisabetta Miserocchi, Giulio Modorati, Adriano Carnevali, Alessandro Marchese, Lea Querques, Giuseppe Querques, Francesco Bandello
PURPOSE: To describe a case of multiple detachments of the neurosensory retina mimicking multifocal vitelliform macular dystrophy after chemotherapy with mitogen/extracellular signal-regulated kinase inhibitor for metastatic ovarian cancer. METHODS: Case report. RESULTS: A 38-year-old woman presented to our clinic for eye examination before the initiation of chemotherapy with trametinib. One month after starting treatment, the patient complained of vision loss and metamorphopsia in both eyes...
November 29, 2016: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/27902540/macular-perivenous-retinal-whitening-and-presumed-retino-ciliary-sparing-in-a-recurrent-central-retinal-vein-occlusion-associated-with-the-antiphospholipid-syndrome-and-cryoglobulinemia
#20
Dov B Sebrow, Jesse J Jung, Jason Horowitz, Jeffrey G Odel, K Bailey Freund
PURPOSE: Macular perivenous retinal whitening results from hypoperfusion-induced ischemia of the middle retina that can occur in central retinal vein occlusion (CRVO). We describe an unusual case of recurrent CRVO with macular perivenous retinal whitening and retino-ciliary venous sparing in the setting of 2 prothrombotic diseases, antiphospholipid syndrome and Type II cryoglobulinemia. METHODS: A 50-year-old man presented with intermittent loss of vision in his right eye related to a recurrent CRVO...
November 29, 2016: Retinal Cases & Brief Reports
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