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Oct 4

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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/27905337/choroidal-thickness-evaluation-of-healthy-eyes-central-serous-chorioretinopathy-and-fellow-eyes-using-spectral-domain-optical-coherence-tomography-in-indian-population
#2
Supriya Arora, Richa Pyare, Preethi Sridharan, Tarun Arora, Meenakshi Thakar, Basudeb Ghosh
AIM: The purpose of this study is to establish a normative database of subfoveal choroidal thickness (CT) in healthy young Indians using spectral domain optical coherence tomography (SD OCT). Evaluation and comparison of CT of central serous chorioretinopathy (CSC) and fellow eyes were also performed. MATERIALS AND METHODS: This was a prospective, cross-sectional, and observational study. It included 112 normal eyes of 112 healthy volunteers who had no evidence of ocular or systemic disease, 84 CSC eyes with acute, treatment-naïve CSC, and 69 fellow eyes with no evidence of neurosensory detachment or pigment epithelium detachment on SD OCT...
October 2016: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/27903454/effects-of-frequently-used-pharmaceutical-excipients-on-the-organic-cation-transporters-1-3-and-peptide-transporters-1-2-stably-expressed-in-mdckii-cells
#3
Marcus Otter, Stefan Oswald, Werner Siegmund, Markus Keiser
There is ample evidence that pharmaceutical excipients, which are supposed to be pharmacologically inactive, have an impact on drug metabolism and efflux transport. So far, little is known whether they also modulate uptake transporter proteins. We have recently shown that commonly used solubilizing agents exert significant effects on the function of organic anion uptake transporting polypeptides. Therefore, we investigated in this study the influence of frequently used pharmaceutical excipients on the transport activity of organic cation transporters OCT1, OCT2 and OCT3 and the peptide transporters PEPT1 and PEPT2...
November 26, 2016: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/27896843/impact-of-clinical-presentation-on-early-vascular-healing-after-bioresorbable-vascular-scaffold-implantation
#4
Moritz Baquet, Christoph Brenner, Maximilian Wenzler, Madeleine Eickhoff, Jochheim David, Stefan Brunner, Hans Theiss, Steffen Massberg, Giulio Guagliumi, Julinda Mehilli
BACKGROUND: Optimal strut coverage and early vascular healing are important factors to reduce the risk of stent thrombosis. Data on early vascular healing with the new bioresorbable vascular scaffolds (BVS) are lacking. Further, healing response after BVS implantation in different clinical presentation has not been fully investigated. METHODS AND RESULTS: We assessed with optical coherence tomography (OCT) the early vascular response to BVS implantation in 26 consecutive patients presenting with acute coronary syndrome (ACS) or stable angina (SA)...
November 28, 2016: Journal of Interventional Cardiology
https://www.readbyqxmd.com/read/27896533/characteristics-of-higher-order-aberrations-and-anterior-segment-tomography-in-patients-with-pathologic-myopia
#5
Kaori Kasahara, Naoyuki Maeda, Takashi Fujikado, Makoto Tomita, Muka Moriyama, Mutsumi Fuchihata, Kyoko Ohno-Matsui
PURPOSE: To investigate prospectively the characteristics in the higher-order aberrations and anterior segment tomography in patients with pathologic myopia. METHODS: One hundred and twelve consecutive highly myopic patients (mean age 43.4 ± 9.3 years, spherical equivalent of refractive error ≥8 D and an axial length ≥26.5 mm) were studied. Thirty-seven emmetropic individuals (mean age 37.0 ± 14.5 years, spherical equivalent of refractive error ≤ ±1 D) were analyzed as controls...
November 28, 2016: International Ophthalmology
https://www.readbyqxmd.com/read/27895995/photoreceptor-disc-shedding-in-the-living-human-eye
#6
Omer P Kocaoglu, Zhuolin Liu, Furu Zhang, Kazuhiro Kurokawa, Ravi S Jonnal, Donald T Miller
Cone photoreceptors undergo a daily cycle of renewal and shedding of membranous discs in their outer segments (OS), the portion responsible for light capture. These physiological processes are fundamental to maintaining photoreceptor health, and their dysfunction is associated with numerous retinal diseases. While both processes have been extensively studied in animal models and postmortem eyes, little is known about them in the living eye, in particular human. In this study, we report discovery of the optical signature associated with disc shedding using a method based on adaptive optics optical coherence tomography (AO-OCT) in conjunction with post-processing methods to track and monitor individual cone cells in 4D...
November 1, 2016: Biomedical Optics Express
https://www.readbyqxmd.com/read/27893097/benefit-of-measuring-anterior-segment-structures-using-an-increased-number-of-optical-coherence-tomography-images-the-chinese-american-eye-study
#7
Benjamin Y Xu, Paul Israelsen, Billy X Pan, Dandan Wang, Xuejuan Jiang, Rohit Varma
Purpose: The purpose of this study was to evaluate the benefit of analyzing an increased number of anterior segment optical coherence tomography (AS-OCT) images on measurement values of various anterior segment parameters. Methods: Subjects for this cross-sectional study were recruited from the Chinese American Eye Study (CHES), a population-based study in Los Angeles, CA. Thirty-two AS-OCT images were acquired from one eye each of 83 consecutive subjects. Sixteen parameters were analyzed in each image, including angle opening distance (AOD), angle recess area (ARA), trabecular iris space area (TISA), trabecular iris angle (TIA), scleral spur angle (SSAngle), lens vault (LV), pupillary diameter (PD), anterior chamber depth (ACD), anterior chamber width (ACW), iris area (IA), and anterior chamber area (ACA)...
November 1, 2016: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/27886571/apigenin-inhibited-hypoxia-induced-stem-cell-marker-expression-in-a-head-and-neck-squamous-cell-carcinoma-cell-line
#8
Yuwaporn Ketkaew, Thanaphum Osathanon, Prasit Pavasant, Sireerat Sooampon
OBJECTIVE: Cancer stem cells contribute to tumor recurrence, and a hypoxic environment is critical for maintaining cancer stem cells. Apigenin is a natural product with anticancer activity. However, the effect of apigenin on cancer stem cells remains unclear. Our aim was to investigate the effect of apigenin on cancer stem cell marker expression in head and neck squamous cell carcinoma cells under hypoxia. DESIGN: We used three head and neck squamous cell carcinoma cell lines; HN-8, HN-30, and HSC-3...
November 15, 2016: Archives of Oral Biology
https://www.readbyqxmd.com/read/27885682/fractional-laser-assisted-drug-uptake-impact-of-time-related-topical-application-to-achieve-enhanced-delivery
#9
Christina A Banzhaf, Daniel Thaysen-Petersen, Christiane Bay, Peter A Philipsen, Mette Mogensen, Tarl Prow, Merete Haedersdal
BACKGROUND AND OBJECTIVE: Ablative fractional laser (AFXL) is acknowledged to increase uptake of topically applied agents in skin. AFXL channels gradually close over time, which may impair this capability. The time frame for applying a drug after AFXL exposure remains to be established. The aim of this study, was to investigate the importance of time-related topical application after AFXL exposure and to relate resultant uptake in skin with AFXL channel morphology and skin integrity. STUDY DESIGN/MATERIALS AND METHODS: Buttock skin of healthy volunteers (n = 11) was exposed to 10,600 nm fractional CO2 laser using 5% density, 120 μm beam diameter, 15 mJ pulse energy...
November 25, 2016: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/27882244/evaluation-of-peripapillary-nerve-fiber-layer-after-dexamethasone-implantation-ozurdex-in-branch-retinal-vein-occlusions
#10
Muhammed Nurullah Bulut, Yusuf Özertürk, Ümit Çallı, Güzide Akçay, Ulviye Kıvrak, Kezban Bulut
Purpose. To evaluate the peripapillary retinal nerve fiber layer (RNFL) thicknesses of patients treated with intravitreal Ozurdex implant due to branch retinal vein occlusion (BRVO) related macular edema (ME). Methods. Thirty-three eyes of 33 patients treated with Ozurdex implant due to ME associated with BRVO were included in the study. Ophthalmic examinations including determination of best corrected visual acuity (BCVA), measurement of intraocular pressure (IOP), and central macular thickness (CMT) and peripapillary RNFL assessment with optical coherence tomography (OCT) were performed before the injection of Ozurdex implant and during the 6-month follow-up period after the injection...
2016: Journal of Ophthalmology
https://www.readbyqxmd.com/read/27880806/choroidal-round-hyporeflectivities-in-geographic-atrophy
#11
Eleonora Corbelli, Riccardo Sacconi, Luigi Antonio De Vitis, Adriano Carnevali, Alessandro Rabiolo, Lea Querques, Francesco Bandello, Giuseppe Querques
PURPOSE: In geographic atrophy (GA), choroidal vessels typically appear on structural optical coherence tomography (OCT) as hyperreflective round areas with highly reflective borders. We observed that some GA eyes show choroidal round hyporeflectivities with highly reflective borders beneath the atrophy, and futher investigated the charcteristcs by comparing structural OCT, indocyanine green angiography (ICGA) and OCT angiography (OCT-A). METHODS: Round hyporeflectivities were individuated from a pool of patients with GA secondary to non-neovascular age-related macular degeneration consecutively presenting between October 2015 and March 2016 at the Medical Retina & Imaging Unit of the University Vita-Salute San Raffaele...
2016: PloS One
https://www.readbyqxmd.com/read/27873325/dynamic-nanomechanical-analysis-of-the-vocal-fold-structure-in-excised-larynges
#12
Gregory R Dion, Paulo G Coelho, Stephanie Teng, Malvin N Janal, Milan R Amin, Ryan C Branski
OBJECTIVES/HYPOTHESIS: Quantification of clinical outcomes after vocal fold (VF) interventions is challenging with current technology. High-speed digital imaging and optical coherence tomography (OCT) of excised larynges assess intact laryngeal function, but do not provide critical biomechanical information. We developed a protocol to quantify tissue properties in intact, excised VFs using dynamic nanomechanical analysis (nano-DMA) to obtain precise biomechanical properties in the micrometer scale...
November 22, 2016: Laryngoscope
https://www.readbyqxmd.com/read/27872047/detection-of-mild-papilloedema-in-posterior-uveitis-using-spectral-domain-optical-coherence-tomography
#13
A Philiponnet, C Vardanian, A Malcles, C Pochat, R Sallit, L Kodjikian
OBJECTIVE: To compare two methods for diagnosing mild papilloedema (PO) using peripapillary total retinal (PTR) and retinal nerve fibre layer (RNFL) thickness measurement by spectral domain optical coherence tomography (OCT) in patients suffering from posterior uveitis. METHODS: 17 eyes in 17 patients with PO caused by posterior uveitis, 15 eyes in 15 patients with uveitis but with no PO based on slit lamp analysis were studied. High-quality OCT fundus images were analysed and graded by three masked observers using the Modified Frisén Scale...
November 21, 2016: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/27870802/intravitreal-infliximab-in-refractory-uveitis-in-behcet-s-disease-a-safety-and-efficacy-clinical-study
#14
Mostafa M E Hamza, Tamer A Macky, Mohamed Karim Sidky, Gaafar Ragab, Mahmoud M Soliman
PURPOSE: To assess the safety and efficacy of intravitreal infliximab (1 mg/0.05 mL) in patients with refractory posterior uveitis in Behcet's disease. METHODS: Twenty patients were included in this study. Best corrected visual acuity (BCVA), vitreous haze (graded 0-4), vasculitis, retinitis, and papillopathy (presence or absence) were assessed at baseline, Day 1 and Week 2, 4, 6, 8, 12, and 18. Optical coherence tomography (OCT) central foveal thickness, fluorescein angiography, and flash electroretinogram were done at baseline and 4, 12, and 18 weeks...
December 2016: Retina
https://www.readbyqxmd.com/read/27867714/automatic-identification-of-the-temporal-retinal-nerve-fiber-raphe-from-macular-cube-data
#15
Phillip Bedggood, Fumi Tanabe, Allison M McKendrick, Andrew Turpin
We evaluated several approaches for automatic location of the temporal nerve fiber raphe from standard macular cubes acquired on a Heidelberg Spectralis OCT. Macular cubes with B-scan separation of 96-122 µm were acquired from 15 healthy participants, and "high density" cubes with scan separation of 11 µm were acquired from the same eyes. These latter scans were assigned to experienced graders for subjective location of the raphe, providing the ground truth by which to compare methods operating on the lower density data...
October 1, 2016: Biomedical Optics Express
https://www.readbyqxmd.com/read/27867703/deep-imaging-of-absorption-and-scattering-features-by-multispectral-multiple-scattering-low-coherence-interferometry
#16
Yang Zhao, Jason R Maher, Mohamed M Ibrahim, Jennifer S Chien, Howard Levinson, Adam Wax
We have developed frequency domain multispectral multiple scattering low coherence interferometry (ms2/LCI) for deep imaging of absorption and scattering contrast. Using tissue-mimicking phantoms that match the full scattering phase function of human dermal tissue, we demonstrate that ms2/LCI can provide a signal/noise ratio (SNR) improvement of 15.4 dB over conventional OCT at an imaging depth of 1 mm. The enhanced SNR and penetration depth provided by ms2/LCI could be leveraged for a variety of clinical applications including the assessment of burn injuries where current clinical classification of severity only provides limited accuracy...
October 1, 2016: Biomedical Optics Express
https://www.readbyqxmd.com/read/27866331/photoreceptor-degeneration-by-intravitreal-injection-of-n-methyl-n-nitrosourea-mnu-in-rabbits-a-pilot-study
#17
Sarah Rösch, Claudia Werner, Frank Müller, Peter Walter
BACKGROUND: Pilot study on the attempt to induce selective photoreceptor degeneration in the rabbit eye by intravitreal injection of MNU, facing the difficulties of the evaluation of retinal degeneration by different in-vivo and in-vitro methods in such a large eye animal model. METHODS: Eight pigmented Chinchilla Bastard rabbits were injected intravitreally with MNU (1 × 1mg/kg body weight (BW), 1 × 2mg/kg BW, 3 × 3mg/kg BW, 1 × 4mg/kg BW, 1 × 6mg/kg BW, and 1 × DMSO + PBS as control)...
November 19, 2016: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/27863959/transmission-of-staphylococcus-aureus-between-health-care-workers-the-environment-and-patients-in-an-intensive-care-unit-a-longitudinal-cohort-study-based-on-whole-genome-sequencing
#18
James R Price, Kevin Cole, Andrew Bexley, Vasiliki Kostiou, David W Eyre, Tanya Golubchik, Daniel J Wilson, Derrick W Crook, A Sarah Walker, Timothy E A Peto, Martin J Llewelyn, John Paul
BACKGROUND: Health-care workers have been implicated in nosocomial outbreaks of Staphylococcus aureus, but the dearth of evidence from non-outbreak situations means that routine health-care worker screening and S aureus eradication are controversial. We aimed to determine how often S aureus is transmitted from health-care workers or the environment to patients in an intensive care unit (ICU) and a high-dependency unit (HDU) where standard infection control measures were in place. METHODS: In this longitudinal cohort study, we systematically sampled health-care workers, the environment, and patients over 14 months at the ICU and HDU of the Royal Sussex County Hospital, Brighton, England...
November 15, 2016: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/27856030/comparison-between-widefield-en-face-swept-source-oct-and-conventional-multimodal-imaging-for-the-detection-of-reticular-pseudodrusen
#19
Karen B Schaal, Andrew D Legarreta, William J Feuer, Giovanni Gregori, Qianqian Cheng, John E Legarreta, Mary K Durbin, Paul F Stetson, Sophie Kubach, Philip J Rosenfeld
PURPOSE: The ability to detect reticular pseudodrusen (RPD)/subretinal drusenoid deposits (SDDs) using 12×12-mm widefield en face swept-source optical coherence tomography (SS-OCT) imaging was compared with conventional multimodal imaging (color, fundus autofluorescence (FAF), and infrared reflectance [IR] imaging) in eyes with nonexudative age-related macular degeneration (AMD). DESIGN: Cross-sectional study. PARTICIPANTS: Patients with nonexudative AMD were prospectively enrolled in an SS-OCT imaging study at the Bascom Palmer Eye Institute...
November 14, 2016: Ophthalmology
https://www.readbyqxmd.com/read/27855873/household-transmission-of-neisseria-meningitidis-in-the-african-meningitis-belt-a-longitudinal-cohort-study
#20
(no author information available yet)
BACKGROUND: Information on transmission of meningococcal infection in the African meningitis belt is scarce. We aimed to describe transmission patterns of Neisseria meningitidis (meningococcus) in households in the African meningitis belt. METHODS: Cross-sectional carriage surveys were done in seven African meningitis belt countries (Chad, Ethiopia, Ghana, Mali, Niger, Nigeria, and Senegal) between Aug 1, 2010, and Oct 15, 2012. Meningococcal carriers identified in these surveys and all available people in their households were recruited into this longitudinal cohort study...
December 2016: Lancet Global Health
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