keyword
MENU ▼
Read by QxMD icon Read
search

Autofluorescence

keyword
https://www.readbyqxmd.com/read/28926190/an-8-year-follow-up-of-anti-vascular-endothelial-growth-factor-treatment-with-a-treat-and-extend-modality-for-neovascular-age-related-macular-degeneration
#1
Karina Berg, Anca B Roald, Jesintha Navaratnam, Ragnheiður Bragadóttir
PURPOSE: To investigate long-term visual results of treatment with anti-vascular endothelial growth factor (VEGF) agents for neovascular age-related macular degeneration (nAMD) following a treat-and-extend regimen. METHODS: Retrospective review of 155 patients who initiated treatment with bevacizumab for nAMD in one eye. At the final 8-year visit, 40 patients (26%) remained for follow-up. Mean change in best-corrected visual acuity (BCVA) was calculated compared to baseline values...
September 19, 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/28922308/large-retinal-pigment-epithelial-rip-associated-with-bullous-retinal-and-choroidal-detachment
#2
Jesse T McCann, Michael Engelbert
PURPOSE: To report a giant retinal pigment epithelium rip in a patient with a bullous retinal and choroidal detachment. METHODS: Case report with widefield imaging, fundus autofluorescence, and optical coherence tomography of the retina. RESULTS: This 62-year-old patient had a history of advanced glaucoma, trabeculectomy, blebitis, and endophthalmitis. He had cataract surgery 6 weeks before presentation. He was found to have a large bullous retinal and choroidal detachment with a large retinal pigment epithelium tear at the limit of the choroidal detachment...
October 2017: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/28921845/detection-and-delineation-of-squamous-neoplasia-with-hyperspectral-imaging-in-a-mouse-model-of-tongue-carcinogenesis
#3
Guolan Lu, Dongsheng Wang, Xulei Qin, Susan Muller, Xu Wang, Amy Y Chen, Zhuo Georgia Chen, Baowei Fei
yperspectral imaging (HSI) holds the potential for the noninvasive detection of cancers. Oral cancers are often diagnosed at a late stage when treatment is less effective and the mortality and morbidity rates are high. Early detection of oral cancer is, therefore, crucial in order to improve the clinical outcomes. To investigate the potential of HSI as a non-invasive diagnostic tool, an animal study was designed to acquire hyperspectral images of in vivo and ex vivo mouse tongues from a chemically induced tongue carcinogenesis model...
September 17, 2017: Journal of Biophotonics
https://www.readbyqxmd.com/read/28919188/-contribution-of-multimodal-imaging-in-the-various-stages-of-stargardt-disease
#4
L El Matri, Y Falfoul, M Kortli, A Hassairi, H Charfi, A Turki, F Kort, A Chebil
PURPOSE: To describe the contribution of multimodal imaging in the various stages of Stargardt disease (STGD). PATIENTS AND METHODS: We retrospectively reviewed 46 eyes of 23 STGD patients with identified ABCA4 mutations. All patients underwent a complete ophthalmic examination, spectral-domain optical coherence tomography (SD-OCT), fundus autofluorescence (FAF), fluorescein angiography (FA) and Indocyanine green angiography (ICGA). RESULTS: The mean age of patients was 25...
September 14, 2017: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/28905541/the-role-of-new-imaging-methods-in-managing-age-related-macular-degeneration
#5
Stephen James Talks, Akhunzada Muhammad Aftab, Imran Ashfaq, Taha Soomro
The use of imaging for age-related macular degeneration (AMD) depends on how it benefits clinical management and on reimbursement. The latter should relate to the former. This review assesses how different forms of AMD can be imaged and what information this provides. For nonneovascular AMD high-resolution optical coherence tomography (OCT), autofluorescence, and near infrared imaging can identify the type of drusen, such as reticular pseudodrusen, which influences prognosis, and the amount of atrophy, for which phase 3 trials are underway...
September 14, 2017: Asia-Pacific Journal of Ophthalmology
https://www.readbyqxmd.com/read/28902333/multi-modal-imaging-including-optical-coherence-tomography-angiography-in-patients-with-posterior-multifocal-placoid-pigment-epitheliopathy
#6
Jens Ulrich Werner, Christian Enders, Gerhard Klaus Lang, Gabriele Elisabeth Lang
BACKGROUND AND OBJECTIVE: New imaging methods provide novel insights into the pathogenesis of acute posterior multifocal placoid pigment epitheliopathy (APMPPE). PATIENTS AND METHODS: Four patients (eight eyes) in acute, subacute, and late phases of the disease were analyzed with multi-modal imaging methods including optical coherence tomography angiography (OCTA), structural OCT, fundus photography, and fundus autofluorescence. One patient was observed during the entire disease course...
September 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/28902331/quantitative-and-qualitative-features-of-spectral-domain-optical-coherence-tomography-provide-prognostic-indicators-for-visual-acuity-in-patients-with-choroideremia
#7
Alessandro Abbouda, Wei Sing Lim, Lina Sprogyte, Andrew R Webster, Mariya Moosajee
BACKGROUND AND OBJECTIVE: To identify qualitative and quantitative features of spectral-domain optical coherence tomography (SD-OCT) as prognostic indicators of visual acuity (VA) loss in patients with choroideremia (CHM). PATIENTS AND METHODS: Retrospective study of 57 male patients with CHM. Central foveal thickness (CFT), subfoveal choroidal thickness (SCT), fundus autofluorescence area, and evidence of outer retinal and choroidal degeneration were analyzed by SD-OCT...
September 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/28902330/centrifugal-extension-of-retinal-atrophy-in-retinal-pigment-epithelium-tears-secondary-to-age-related-macular-degeneration
#8
Vittorio Capuano, Roberta Farci, Alexandra Miere, Francesca Amoroso, Francesco Bandello, Eric H Souied, Giuseppe Querques
BACKGROUND AND OBJECTIVE: To investigate the progression of retinal atrophy in patients with retinal pigment epithelium (RPE) tears secondary to neovascular age-related macular degeneration. PATIENTS AND METHODS: In this retrospective case series, patients were analyzed at two high-volume referral centers. The extension of the areas without RPE was analyzed yearly from baseline to last examination through fundus autofluorescence (FAF) imaging using Region Finder (Heidelberg Engineering, Heidelberg, Germany)...
September 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/28902232/advanced-glycation-end-products-ages-accumulation-in-skin-relations-with-chronic-kidney-disease-mineral-and-bone-disorder
#9
Renata de Almeida França, André de Barros Albuquerque Esteves, Cynthia de Moura Borges, Kélcia Rosana da Silva Quadros, Luiz Carlos Nogueira Falcão, Jacqueline Costa Teixeira Caramori, Rodrigo Bueno de Oliveira
Introduction: Chronic kidney disease (CKD) is associated with high morbidity and mortality rates, main causes related with cardiovascular disease (CVD) and bone mineral disorder (CKD-BMD). Uremic toxins, as advanced glycation end products (AGEs), are non-traditional cardiovascular risk factor and play a role on development of CKD-BMD in CKD. The measurement of skin autofluorescence (sAF) is a noninvasive method to assess the level of AGEs in tissue, validated in CKD patients. Objective: The aim of this study is analyze AGEs measured by sAF levels (AGEs-sAF) and its relations with CVD and BMD parameters in HD patients...
August 28, 2017: Jornal Brasileiro de Nefrologia: ʹorgão Oficial de Sociedades Brasileira e Latino-Americana de Nefrologia
https://www.readbyqxmd.com/read/28901721/bioluminescence-resonance-energy-transfer-bret-coupled-annexin-v-functionalized-quantum-dots-for-near-infrared-optical-detection-of-apoptotic-cells
#10
Takashi Jin, Setsuko Tsuboi
Deregulation in apoptosis induces numerous diseases such as cancer, cardiovascular and neurodegenerative diseases. The detection of apoptotic cells is crucial for understanding the mechanism of those diseases and for therapy development. Although optical imaging using visible-emitting fluorescent probes such as FITC-labeled annexin V is widely used for the detection of apoptotic cells, there are a very limited probes that can be used in near-infrared (NIR) region over 700 nm. Compared with visible light, NIR light is highly permeable in turbid biological samples and tissues...
September 13, 2017: Chembiochem: a European Journal of Chemical Biology
https://www.readbyqxmd.com/read/28900746/electrophysiological-features-and-multimodal-imaging-in-ritonavir-related-maculopathy
#11
Céline Faure, Michel Paques, Isabelle Audo
PURPOSE: The purpose of this study is to report a case of ritonavir-related retinal toxicity followed over a year. Electrophysiological features and multimodal imaging, including adaptive optics, are provided and discussed. METHODS: Electrophysiological recordings and multimodal imaging were performed and repeated over 1 year. RESULTS: Fundus examination revealed crystalline maculopathy in conjunction with pigment disruption. Spectral domain optical coherence tomography displayed thinning of the macula without cysts...
September 12, 2017: Documenta Ophthalmologica. Advances in Ophthalmology
https://www.readbyqxmd.com/read/28895631/-oct-angiography-of-rpe-tears-in-exudative-amd-morpohological-analysis-of-the-choriocapillaris-and-the-rpe
#12
Matthias Gutfleisch, Kai Rothaus, Marie-Louise Farecki, Henrik Faatz, Britta Heimes-Bussmann, Frederic Gunnemann, Martin Ziegler, Ioannis Papapostolou, Albrecht Lommatzsch, Daniel Pauleikoff
Background Retinal pigment epithelium (RPE) tears are a typical complication of vascular pigment epithelium detachment in age-related macular degeneration (AMD). During proactive intense anti-VEGF therapy, stabilisation or improvement of function may occur. With the new method of OCT angiography (OCT-A), retinal vessels and flow density can be quantified. This pilot study investigates changes in the choriocapillars (CC) in areas with increasing FAF in OCT following an RPE-tear. Methods In six eyes with an RPE-tear, prospectively initially and every three months thereafter, multimodal imaging was performed, including fundus autofluorescence (FAF) (HRA2, Heidelberg Engineering, Heidelberg, Deutschland) and OCT-A (RTVue XR Avanti, SSDA-Modus, Angiovue, Optovue, Freemont, CA, USA)...
September 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/28892031/simple-elimination-of-background-fluorescence-in-formalin-fixed-human-brain-tissue-for-immunofluorescence-microscopy
#13
Yulong Sun, Philbert Ip, Avijit Chakrabartty
Immunofluorescence is a common method used to visualize subcellular compartments and to determine the localization of specific proteins within a tissue sample. A great hindrance to the acquisition of high quality immunofluorescence images is endogenous autofluorescence of the tissue caused by aging pigments such as lipofuscin or by common sample preparation processes such as aldehyde fixation. This protocol describes how background fluorescence can be greatly reduced through photobleaching using white phosphor light emitting diode (LED) arrays prior to treatment with fluorescent probes...
September 3, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28886928/geographic-atrophy-etiopathogenesis-and-current-therapies
#14
M Sastre-Ibáñez, A Barreiro-González, R Gallego-Pinazo, R Dolz-Marco, B García-Armendariz
Geographic atrophy is characterized by severe visual deficit whose etiology and pathophysiology are yet to be elucidated. As a working hypothesis, oxidative damage could trigger a chronic inflammation in Bruch's membrane-RPE-choriocapillaris complex, mostly due to complement pathway overactivation. Some individuals with mutations in the complement system and other factors have diminished capacity in the modulation of the inflammatory response, which results in cell damage and waste accumulation. This accumulation of intracellular and extracellular waste products manifests as drusen and pigmentary changes that precede the atrophy of photoreceptors, RPE, choriocapillaris with an ischemic process with decreased choroid flow...
September 5, 2017: Archivos de la Sociedad Española de Oftalmología
https://www.readbyqxmd.com/read/28885867/clinical-characteristics-of-recessive-retinal-degeneration-due-to-mutations-in-the-cdhr1-gene-and-a-review-of-the-literature
#15
A P Bessette, M J DeBenedictis, E I Traboulsi
BACKGROUND: The clinical phenotype of patients presenting with autosomal recessive CDHR1-related retinopathy has not been well described. MATERIALS AND METHODS: This is a retrospective case series of patients presenting to a single institution. Clinical data, including age, visual acuity, dilated fundus exam, fundus photos, fundus autofluorescence (FAF), optical coherence tomography, full-field electroretinograms (ERGs), and results of genetic testing, were collected...
September 8, 2017: Ophthalmic Genetics
https://www.readbyqxmd.com/read/28882513/enhanced-detection-of-rickettsia-species-in-ixodes-pacificus-using-highly-sensitive-fluorescence-in-situ-hybridization-coupled-with-tyramide-signal-amplification
#16
Ghazaleh Bagheri, Jeremy D Lehner, Jianmin Zhong
Ixodes pacificus is a host of many bacteria including Rickettsia species phylotypes G021 and G022. As part of the overall goal of understanding interactions of phylotypes with their tick host, this study focused on molecular detection of rickettsiae in ovarian and midgut tissue of I. pacificus by fluorescent in situ hybridization (FISH), PCR, and ultrastructural analysis. Of three embedding media (Technovit 8100, Unicryl, and paraffin) tested for generating thin sections, tissues embedded in paraffin resulted in the visualization of bacteria with low autofluorescence in FISH...
August 9, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28882392/fundus-autofluorescence-in-retinal-artery-occlusion-a-more-precise-diagnosis
#17
J-L Bacquet, M Sarov-Rivière, C Denier, G Querques, B Riou, L Bonin, E Barreau, M Labetoulle, A Rousseau
IMPORTANCE: Retinal artery occlusion (RAO) is a medical emergency associated with a high risk of cerebral vascular accident and other cardiovascular events. Among patients with non-arteritic RAO, a retinal embolus is observed in approximately 40% of cases. Fundus examination and retinography are not reliable to predict the nature of the emboli. OBSERVATIONS: We report three consecutive cases of central and branch RAO that were investigated with fundus autofluorescence, fluorescein angiography and color retinal photographs...
September 4, 2017: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/28880249/event-associated-oxygen-consumption-rate-increases-ca-five-fold-when-interictal-activity-transforms-into-seizure-like-events-in-vitro
#18
Karl Schoknecht, Nikolaus Berndt, Jörg Rösner, Uwe Heinemann, Jens P Dreier, Richard Kovács, Alon Friedman, Agustin Liotta
Neuronal injury due to seizures may result from a mismatch of energy demand and adenosine triphosphate (ATP) synthesis. However, ATP demand and oxygen consumption rates have not been accurately determined, yet, for different patterns of epileptic activity, such as interictal and ictal events. We studied interictal-like and seizure-like epileptiform activity induced by the GABAA antagonist bicuculline alone, and with co-application of the M-current blocker XE-991, in rat hippocampal slices. Metabolic changes were investigated based on recording partial oxygen pressure, extracellular potassium concentration, and intracellular flavine adenine dinucleotide (FAD) redox potential...
September 7, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28880154/micromagnetic-stimulation-of-the-mouse-auditory-cortex-in-vivo-using-an-implantable-solenoid-system
#19
Shunsuke Minusa, Hisayuki Osanai, Takashi Tateno
OBJECTIVE: Recent studies have reported that micromagnetic stimulation (μMS), which can activate neural tissue and cells via sub-millimeter inductors, may address several limitations of conventional magnetic stimulation methods. Previous studies have examined the effects of μMS on single neurons, yet little is known about how μMS can affect brain tissue including local neural networks. Here, we propose a new, readily available implantable μMS system and computationally and experimentally evaluate its validity...
September 1, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28875932/h-and-na-elicited-rapid-changes-of-the-microtubule-cytoskeleton-in-the-biflagellated-green-alga-chlamydomonas
#20
Yi Liu, Mike Visetsouk, Michelle Mynlieff, Hongmin Qin, Karl F Lechtreck, Pinfen Yang
Although microtubules are known for dynamic instability, the dynamicity is considered to be tightly controlled to support a variety of cellular processes. Yet diverse evidence suggests that this is not applicable to Chlamydomonas, a biflagellate fresh water green alga, but intense autofluorescence from photosynthesis pigments has hindered the investigation. By expressing a bright fluorescent reporter protein at the endogenous level, we demonstrate in real time discreet sweeping changes in algal microtubules elicited by rises of intracellular H(+) and Na(+)...
September 6, 2017: ELife
keyword
keyword
42539
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"