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https://www.readbyqxmd.com/read/28649148/origins-and-genetic-diversity-of-introduced-populations-of-the-puerto-rican-red-eyed-coqu%C3%A3-eleutherodactylus-antillensis-in-saint-croix-u-s-virgin-islands-and-panam%C3%A3
#1
Brittany S Barker, Javier A Rodríguez-Robles
The Red-eyed Coquí, Eleutherodactylus antillensis, is a terrestrial frog endemic to the Puerto Rican Bank (Puerto Rico and numerous islands and cays off its eastern coast), in the eastern Caribbean Sea. The species was likely introduced in Saint Croix, an island c. 100 km southeast of Puerto Rico, in the late 1930s, and in Panamá City, Panamá, in the late 1950s or early 1960s, but the source(s) of these introductions are unknown. We analyzed sequence data from one mtDNA locus and four nuDNA introns to infer the origin(s) of the Saint Croix and Panamá City populations and quantify their genetic diversity...
July 2017: Copeia
https://www.readbyqxmd.com/read/28634888/saccades-evoked-in-response-to-electrical-stimulation-of-the-posterior-bank-of-the-arcuate-sulcus
#2
E Neromyliotis, A K Moschovakis
To test the hypothesis that the premotor cortex in and behind the caudal bank of the arcuate sulcus can generate saccades, we stimulated electrically the periarcuate region of alert rhesus monkeys. We were able to produce saccades from sites of the premotor cortex that were contiguous with the frontal eye fields and extended up to 2 mm behind the smooth pursuit area. However, premotor sites often elicited saccades with ipsiversive characteristic vectors, lower peak velocities, and flatter velocity profiles when compared to saccades evoked from the frontal eye field...
June 20, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28597192/pre-banking-microbial-contamination-of-donor-conjunctiva-and-storage-medium-for-penetrating-keratoplasty
#3
Takenori Inomata, Koichi Ono, Tsuyoshi Matsuba, Tina Shiang, Antonio Di Zazzo, Satoru Nakatani, Masahiro Yamaguchi, Nobuyuki Ebihara, Akira Murakami
PURPOSE: The aims of this study were to investigate the incidence of positive donor tissue cultures before transfer to preservation medium (Optisol™-GS) for penetrating keratoplasty, to verify the efficacy of antibiotics contained in Optisol™-GS by examining the drug susceptibility and to assess the relationship between the results of our microbial assessments as well as donor factors and the incidence of contamination. METHODS: We conducted a retrospective, cross-sectional study using Juntendo Eye Bank records for all corneal transplantations...
June 8, 2017: Japanese Journal of Ophthalmology
https://www.readbyqxmd.com/read/28594621/an-undergraduate-placemement-at-the-st-john-eye-hospital-jerusalem
#4
Ruth Dickinson
The elective placement is an opportunity for nursing undergraduates to independently decide where to go and what to do to widen their clinical experience. Being able to decide on and participate in an elective placement provides student nurses with a chance to work in a different area and explore personal ambitions. This reflective account examines a student nurse's experiences while on an elective placement at an eye hospital in East Jerusalem and the West Bank.
June 8, 2017: British Journal of Nursing: BJN
https://www.readbyqxmd.com/read/28575912/-growth-factor-concentration-in-keratocyte-supernatant-after-incubation-with-human-serum-in-vitro
#5
Nóra Szentmáry, Tanja Stachon, Ming-Feng Wu, Mona Bischoff, Manuela Huber, Achim Langenbucher, Berthold Seitz
Purpose Application of serum eye drops is an alternative treatment option for therapy-resistant corneal epithelial defects. In case of persisting epithelial defects, cytokines, which are secreted from stromal keratocytes, may play a role in epithelial wound healing. Our aim was to analyze fibroblast growth factor basic (FGFb), hepatocyte growth factor (HGF), keratinocyte growth factor (KGF) and transforming growth factor β1 (TGF-β1) concentration in the supernatant of keratocytes, after incubation with human serum (HS)...
June 2, 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/28574496/optical-clearing-of-the-eye-using-the-see-deep-brain-technique
#6
B Hohberger, C Baumgart, A Bergua
PurposeTissue clearing has been used in anatomy for the first time in Germany over a century ago. Neuronal tissue, like cortex, was investigated in mice using a water-based optical clearing method termed See Deep Brain (SeeDB). However, although the eye belongs to the central nervous system, this histological technique was not applied in the eye up to date. We applied SeeDB for the visualization of intraocular structures.Patients and methodsFour eyes of cornea donors (two male, two female: 73-84 years) obtained from the Cornea Bank of the Department of Ophthalmology Erlangen, four chicken eyes and two mices' optic nerve were used...
June 2, 2017: Eye
https://www.readbyqxmd.com/read/28542087/validity-of-postmortem-glycated-hemoglobin-to-determine-status-of-diabetes-mellitus-in-corneal-donors
#7
Mark C Soper, Santica M Marcovina, Caroline K Hoover, Peter M Calhoun, Kristen E McCoy, Christopher G Stoeger, Gregory A Schmidt, Baha M Arafah, Marianne O Price, Loretta B Szczotka-Flynn, Jonathan H Lass
PURPOSE: To examine the stability of postmortem glycated hemoglobin (HbA1c) measurement and its relationship to premortem glycemia. METHODS: Postmortem blood samples were obtained from 32 donors (8 known diabetic) and shipped on ice to a central laboratory to examine the stability of HbA1c measurements during the first 9 postmortem days. Thirty-nine other suspected diabetic donors underwent comparison of premortem and postmortem HbA1c measurements. RESULTS: Postmortem HbA1c measurements remained stable after 9 postmortem days (all measurements within ±0...
May 23, 2017: Cornea
https://www.readbyqxmd.com/read/28535143/intercultural-communication-through-the-eyes-of-patients-experiences-and-preferences
#8
Emma Paternotte, Sandra van Dulmen, Lindsay Bank, Conny Seeleman, Albert Scherpbier, Fedde Scheele
Objectives: To explore patients' preferences and experiences regarding intercultural communication which could influence the development of intercultural patient-centred communication training. Methods: This qualitative study is based on interviews with non-native patients. Thirty non-native patients were interviewed between September and December 2015 about their preferences and experiences regarding communication with a native Dutch doctor. Fourteen interviews were established with an interpreter...
May 16, 2017: International Journal of Medical Education
https://www.readbyqxmd.com/read/28508165/frequency-of-toxoplasma-gondii-in-the-retina-in-eye-banks-in-brazil
#9
Deise F Costa, Heloisa Nascimento, Aline Sutili, Fernando A J Nobrega, Flavio Fowler, Mario Junqueira Nobrega, Cristina Garrido, Janaina de Oliveira Dias, Consuelo B D Adán, Luiz Vicente Rizzo, Claudio Silveira, Rubens Belfort, Alessandra G Commodaro
Ocular toxoplasmosis is the main cause of posterior uveitis worldwide frequently leading to vision loss. In Brazil, the seroprevalence of Toxoplasma gondii infection ranges from 50 to 80% depending of the region studied. The frequency of toxoplasmic retinal scar may reach 18% of the adults in the South of Brazil. Our goal was to determine the frequency of T. gondii DNA in retinas from eye banks from different regions in Brazil. A total of 162 eyes were obtained from eye banks in Manaus (n = 60), Sao Paulo (n = 60), Chapeco (n = 26), and Joinville (n = 16)...
July 2017: Parasitology Research
https://www.readbyqxmd.com/read/28495906/emergency-corneal-grafting-in-the-uk-a-6-year-analysis-of-the-uk-transplant-registry
#10
Parwez Hossain, Abdo Karim Tourkmani, Dimitri Kazakos, Mark Jones, David Anderson
BACKGROUND: Corneal graft (CG) surgery is the most common and successful tissue transplant worldwide. A small and important group of patients are operated in emergency situations, typically to save a perforated eye. Our knowledge of the indications and outcomes of emergency corneal graft (eCG) is limited. METHODS: Retrospective, multifactorial analysis of all CGs registered by the UK Transplant Service from April 1999 to March 2005. RESULTS: A total of 12 976 CGs were performed...
May 11, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28489792/eye-bank-prepared-versus-surgeon-cut-endothelial-graft-tissue-for-descemet-membrane-endothelial-keratoplasty-an-observational-study
#11
COMPARATIVE STUDY
Marie Regnier, Céline Auxenfans, Delphine Maucort-Boulch, Anne-Sophie Marty, Odile Damour, Carole Burillon, Viridiana Kocaba
The purpose of this article is to examine outcomes of Descemet membrane endothelial keratoplasty (DMEK) performed with cornea bank (CB) prestripped tissue and surgeon stripped tissue (SST).This retrospective study examined subjects who underwent DMEK with CB or surgeon prepared tissue for Fuchs endothelial corneal dystrophy. Best-corrected visual acuity (BCVA), corneal thickness, endothelial cell count (ECC), and complications were examined before and throughout a 6-month postoperative period.Eleven CB and 22 SST subjects were included...
May 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28469991/donor-transmitted-melanoma-after-limbal-stem-cell-transplantation
#12
Anas Alsara, Muhammad Rafi
Limbal Stem Cells are a unique cell line located at the corneal limbus. They are responsible for regenerating and restoring corneal epithelial layers. Limbal stem cell transplantation is a promising technique that has been used to treat several hereditary and acquired corneal diseases. Cornea tissue lack vascularity. Hence, there were no special restrictions on collecting ocular tissues from donors with a diagnosis of metastatic melanoma. We are reporting a case of a patient who developed an ocular melanoma after she had limbal stem cell transplantation from a donor with history of melanoma...
April 2017: Avicenna Journal of Medicine
https://www.readbyqxmd.com/read/28457284/corneal-surgery-in-the-flying-eye-hospital-characteristics-and-visual-outcome
#13
Javed Hussain Farooqui, Emile Sharifi, Ahmed Gomaa
OBJECTIVE: The Flying Eye Hospital (FEH) of ORBIS International is a capacity-building platform that trains ophthalmologists throughout the developing world on-board a fully functional eye hospital based in an airplane and in the local hospitals of developing countries. Corneal blindness (CB) is the second leading cause of blindness in most developing countries. Treatment of existing global CB requires effective eye banking and surgeons trained in corneal transplant. ORBIS International has programs that addressed both those needs...
April 2017: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
https://www.readbyqxmd.com/read/28450146/alternatives-to-eye-bank-native-tissue-for-corneal-stromal-replacement
#14
REVIEW
Isabelle Brunette, Cynthia J Roberts, François Vidal, Mona Harissi-Dagher, Jean Lachaine, Heather Sheardown, Georges M Durr, Stéphanie Proulx, May Griffith
Corneal blindness is a major cause of blindness in the world and corneal transplantation is the only widely accepted treatment to restore sight in these eyes. However, it is becoming increasingly difficult for eye banks to meet the increasing demand for transplantable tissue, which is in part due to population aging. Donor tissue shortage is therefore a growing concern globally and there is a need for alternatives to human donor corneas. Biosynthetic corneal substitutes offer several significant advantages over native corneas: Large-scale production offers a powerful potential solution to the severe shortage of human donor corneas worldwide; Good manufacturing practices ensure sterility and quality control; Acellular corneal substitutes circumvent immune rejection induced by allogeneic cells; Optical and biomechanical properties of the implants can be adapted to the clinical need; and finally these corneal substitutes could benefit from new advances in biomaterials science, such as surface coating, functionalization and nanoparticles...
April 24, 2017: Progress in Retinal and Eye Research
https://www.readbyqxmd.com/read/28446867/response-properties-of-motor-equivalence-neurons-of-the-primate-premotor-cortex
#15
Eleftherios Neromyliotis, A K Moschovakis
To study the response properties of cells that could participate in eye-hand coordination we trained two macaque monkeys to perform center-out saccades and pointing movements with their right or left forelimb toward visual targets presented on a video display. We analyzed the phasic movement related discharges of neurons of the periarcuate cortex that fire before and during saccades and movements of the hand whether accompanied by movements of the other effector or not. Because such cells could encode an abstract form of the desired displacement vector without regard to the effector that would execute the movement we refer to such cells as motor equivalence neurons (Meq)...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/28397149/considering-3d-topography-of-endothelial-folds-to-improve-cell-count-of-organ-cultured-corneas
#16
Clotilde Jumelle, Thibaud Garcin, Anne Sophie Gauthier, Yaël Glasson, Aurélien Bernard, Yann Gavet, Jacques Klossa, Zhiguo He, Sophie Acquart, Philippe Gain, Gilles Thuret
The posterior side of the cornea is covered by the endothelial monolayer, which governs corneal transparency but cannot proliferate. Determination of endothelial cell density (ECD) is therefore the minimal and mandatory quality control in all eye banks. It avoids primary graft failures caused by endothelial insufficiency, and allows allocation of corneas to surgical techniques requiring different numbers of endothelial cells (ECs). Corneas stored in organ culture (17% of grafts worldwide), are characterized by heavy stromal swelling and numerous deep endothelial folds, up to 200 µm high...
June 2017: Cell and Tissue Banking
https://www.readbyqxmd.com/read/28381247/outcomes-of-descemet-stripping-automated-endothelial-keratoplasty-using-imported-donor-corneas
#17
Kaevalin Lekhanont, Kavin Vanikieti, Nutthida Nimvorapun, Varintorn Chuckpaiwong
BACKGROUND: The lack of development of local donor tissue acquisition in several regions of the world has resulted in the necessity of performing keratoplasty with imported donor corneas. The greatest concern about the use of donor corneas supplied by foreign eye banks is the effect of the increased donor death-to-operation time which inevitably occurs during the tissue recovery, tissue processing, and tissue transfer between the countries. The purpose of this study was to report the outcomes of descemet stripping automated endothelial keratoplasty (DSAEK) using imported donor corneas...
April 5, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28378499/autologous-cord-blood-infusions-are-safe-and-feasible-in-young-children-with-autism-spectrum-disorder-results-of-a-single-center-phase-i-open-label-trial
#18
Geraldine Dawson, Jessica M Sun, Katherine S Davlantis, Michael Murias, Lauren Franz, Jesse Troy, Ryan Simmons, Maura Sabatos-DeVito, Rebecca Durham, Joanne Kurtzberg
Despite advances in early diagnosis and behavioral therapies, more effective treatments for children with autism spectrum disorder (ASD) are needed. We hypothesized that umbilical cord blood-derived cell therapies may have potential in alleviating ASD symptoms by modulating inflammatory processes in the brain. Accordingly, we conducted a phase I, open-label trial to assess the safety and feasibility of a single intravenous infusion of autologous umbilical cord blood, as well as sensitivity to change in several ASD assessment tools, to determine suitable endpoints for future trials...
May 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28374155/morphometry-of-organ-cultured-corneal-endothelium-using-voronoi-segmentation
#19
Nigel H Brookes
The endothelial viability of eye-banked corneas must be assessed before transplantation, yet phase-contrast images of the endothelium of corneas stored in an Organ Culture system have a huge variety of endothelial appearance at different focal planes, due to stromal swelling and an evaluation technique that swells the cells and their intercellular spaces to make them visible. This makes them difficult to assess using common edge-based segmentation methodologies that have mostly been developed in vivo using specular microscopy...
June 2017: Cell and Tissue Banking
https://www.readbyqxmd.com/read/28370795/a-pair-of-glasses-and-beyond-impact-of-refractive-error-on-people-s-well-being
#20
Himal Kandel, Jyoti Khadka, Michael Goggin, Konrad Pesudovs
IMPORTANCE: This study qualitative explores the impact of refractive error on adults, particularly after correction. BACKGROUND: The study aimed to explore the impact of refractive error on people's quality of life. DESIGN: Cross sectional; In-depth telephone and face-to-face semi-structured interviews; Qualitative study with inductive and deductive processes PARTICIPANTS: 48 adults with refractive error (including presbyopia) were recruited from the Flinders Vision, the Ashford Advanced Eye Care and among Flinders University staff and students, in South Australia...
March 31, 2017: Clinical & Experimental Ophthalmology
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