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https://www.readbyqxmd.com/read/28109869/outcomes-infectiousness-and-transmission-dynamics-of-patients-with-extensively-drug-resistant-tuberculosis-and-home-discharged-patients-with-programmatically-incurable-tuberculosis-a-prospective-cohort-study
#1
Keertan Dheda, Jason D Limberis, Elize Pietersen, Jody Phelan, Aliasgar Esmail, Maia Lesosky, Kevin P Fennelly, Julian Te Riele, Barbara Mastrapa, Elizabeth M Streicher, Tania Dolby, Abdallah M Abdallah, Fathia Ben-Rached, John Simpson, Liezel Smith, Tawanda Gumbo, Paul van Helden, Frederick A Sirgel, Ruth McNerney, Grant Theron, Arnab Pain, Taane G Clark, Robin M Warren
BACKGROUND: The emergence of programmatically incurable tuberculosis threatens to destabilise control efforts. The aim of this study was to collect prospective patient-level data to inform treatment and containment strategies. METHODS: In a prospective cohort study, 273 South African patients with extensively drug-resistant tuberculosis, or resistance beyond extensively drug-resistant tuberculosis, were followed up over a period of 6 years. Transmission dynamics, infectiousness, and drug susceptibility were analysed in a subset of patients from the Western Cape using whole-genome sequencing (WGS; n=149), a cough aerosol sampling system (CASS; n=26), and phenotypic testing for 18 drugs (n=179)...
January 18, 2017: Lancet Respiratory Medicine
https://www.readbyqxmd.com/read/28109620/effect-of-pre-operative-octenidine-nasal-ointment-and%C3%A2-showering-on-surgical-site-infections-in-patients-undergoing-cardiac-surgery
#2
M Reiser, A Scherag, C Forstner, F M Brunkhorst, S Harbarth, T Doenst, M W Pletz, S Hagel
OBJECTIVE: To evaluate the effect of pre-operative octenidine (OCT) decolonization on surgical site infection (SSI) rates. DESIGN: Before-and-after cohort study. PATIENTS: Patients undergoing an elective isolated coronary artery bypass graft (CABG) procedure: control group (1(st) January to 31(st) December 2013), N=475; intervention group (1(st) January to 31(st) December 2014), N=428. INTERVENTIONS: The intervention consisted of nasal application of OCT ointment three times daily, beginning on the day before surgery, and showering the night before and on the day of surgery with OCT soap...
November 18, 2016: Journal of Hospital Infection
https://www.readbyqxmd.com/read/28109054/intracoronary-optical-coherence-tomography-clinical-and-research-applications-and-intravascular-imaging-software-overview
#3
Erhan Tenekecioglu, Felipe N Albuquerque, Yohei Sotomi, Yaping Zeng, Pannipa Suwannasom, Hiroki Tateishi, Rafael Cavalcante, Yuki Ishibashi, Shimpei Nakatani, Mohammad Abdelghani, Jouke Dijkstra, Christos Bourantas, Carlos Collet, Antonios Karanasos, Maria Radu, Ancong Wang, Takashi Muramatsu, Ulf Landmesser, Takayuki Okamura, Evelyn Regar, Lorenz Räber, Giulio Guagliumi, Robert T Pyo, Yoshinobu Onuma, Patrick W Serruys
By providing valuable information about the coronary artery wall and lumen, intravascular imaging may aid in optimizing interventional procedure results and thereby could improve clinical outcomes following percutaneous coronary intervention (PCI). Intravascular optical coherence tomography (OCT) is a light-based technology with a tissue penetration of approximately 1 to 3 mm and provides near histological resolution. It has emerged as a technological breakthrough in intravascular imaging with multiple clinical and research applications...
January 21, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28108906/a-novel-marker-in-acute-central-serous-chorioretinopathy-thiol-disulfide-homeostasis
#4
Hasan Altinkaynak, Piraye Zeynep Kurkcuoglu, Mehtap Caglayan, Mücella Arıkan Yorgun, Nilay Yuksel, Pınar Kosekahya, Cemile Koca, Yasin Toklu
PURPOSE: The aim of this study was to compare dynamic thiol/disulfide homeostatic status in acute central serous chorioretinopathy (CSCR) patients by using a novel and automated assay determining dynamic thiol/disulfide homeostasis. METHODS: Fifty-one patients with acute CSCR (study group) and 65 healthy individuals (control group) were enrolled in this study. Diagnosis of acute CSCR was made clinically and using spectral-domain RTVue OCT (optical coherence tomography) (Optovue, Fremont, CA)...
January 21, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28108905/the-assessment-of-macular-electrophysiology-and-macular-morphology-in-patients-with-vitiligo
#5
Rukiye Aydin, Mustafa Ozsutcu, Sevil Karaman Erdur, Funda Dikkaya, Ali Balevi, Merve Ozbek, Fevzi Senturk
PURPOSE: We aimed to analyze the electrophysiologic function and morphology of macula in vitiligo patients. METHODS: Seventeen patients with vitiligo and 11 healthy subjects were studied. All participants underwent multifocal electroretinography (mfERG) and spectral domain optical coherence tomography (SD-OCT) evaluations. The mfERG (P1 mfERG responses central and peripheral) and retinal layer segmentation parameters (nine ETDRS subfields) were compared in vitiligo and control groups...
January 21, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28108289/negative-feedback-regulation-between-microrna-let-7g-and-lox-1-mediated-hypoxia-induced-pasmcs-proliferation
#6
Wei-Fang Zhang, Tian-Tian Zhu, You-Wen Xiong, Ai-Zhen Xiong, Xiao-Yue Ge, Chang-Ping Hu, Zheng Zhang
BACKGROUND: Pulmonary hypertension (PH) is a proliferative disorder associated with enhanced proliferation and suppressed apoptosis of pulmonary artery smooth muscle cells (PASMCs). Our lately study demonstrated that let-7g inhibited hypoxia-induced proliferation of PASMCs via repressed c-myc-Bmi-1-p16 signaling pathway. However, the upstream of let-7g has not yet been fully defined. Previous studies have shown that LOX-1, a target of let-7g, could also regulate the expression of let-7g in human aortic endothelial cells...
January 17, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28107458/neuropilin-1-involvement-in-choroidal-and-retinal-neovascularisation
#7
Patricia Fernández-Robredo, Senthil Selvam, Michael B Powner, Dawn A Sim, Marcus Fruttiger
PURPOSE: Inhibiting VEGF is the gold standard treatment for neovascular age-related macular degeneration (AMD). It is also effective in preventing retinal oedema and neovascularisation (NV) in diabetic retinopathy (DR) and retinal vein occlusions (RVO). Neuropilin 1 (Nrp1) is a co-receptor for VEGF and many other growth factors, and therefore a possible alternative drug target in intra ocular neovascular disease. Here we assessed choroidal and retinal NV in an inducible, endothelial specific knock out model for Nrp1...
2017: PloS One
https://www.readbyqxmd.com/read/28107368/multi-channel-optical-coherence-elastography-using-relative-and-absolute-shear-wave-time-of-flight
#8
Eli Elyas, Alex Grimwood, Janine T Erler, Simon P Robinson, Thomas R Cox, Daniel Woods, Peter Clowes, Ramona De Luca, Franco Marinozzi, Jérémie Fromageau, Jeffrey C Bamber
Elastography, the imaging of elastic properties of soft tissues, is well developed for macroscopic clinical imaging of soft tissues and can provide useful information about various pathological processes which is complementary to that provided by the original modality. Scaling down of this technique should ply the field of cellular biology with valuable information with regard to elastic properties of cells and their environment. This paper evaluates the potential to develop such a tool by modifying a commercial optical coherence tomography (OCT) device to measure the speed of shear waves propagating in a three-dimensional (3D) medium...
2017: PloS One
https://www.readbyqxmd.com/read/28106890/assessment-of-a-new-hydrophilic-acrylic-supplementary-iol-for-sulcus-fixation-in-pseudophakic-cadaver-eyes
#9
N Reiter, L Werner, J Guan, J Li, K T Tsaousis, N Mamalis, S Srinivasan
PurposeManagement of refractive errors after cataract surgery includes spectacles or contact lens, secondary laser vision correction, intraocular lens (IOL) exchange, or piggyback lens implantation. We evaluated for the first time a single-piece hydrophilic acrylic IOL designed for supplementary sulcus fixation in postmortem pseudophakic human eyes.MethodsPseudophakic human cadaver eyes were imaged by anterior segment optical coherence tomography (AS-OCT) to assess position of the primary IOL. Eyes were prepared as per the Miyake-Apple technique...
January 20, 2017: Eye
https://www.readbyqxmd.com/read/28106555/optical-coherence-tomography-reveals-retinal-neuroaxonal-thinning-in-frontotemporal-dementia-as-in-alzheimer-s-disease
#10
Laura Ferrari, Su-Chun Huang, Giuseppe Magnani, Alessandro Ambrosi, Giancarlo Comi, Letizia Leocani
BACKGROUND: Alzheimer's disease (AD) and frontotemporal dementia (FTD) are leading causes of cognitive decline. Optical coherence tomography (OCT) allows the measurement of thickness of retinal neuroaxonal layers. While in AD and mild cognitive impairment (MCI), retinal nerve fiber layer (RNFL) thinning is frequently reported, less information is available on ganglion cell layer-inner plexiform layer (GCL-IPL). Data on FTD are lacking. OBJECTIVE: To obtain cross-sectional information on RNFL and GCL-IPL thickness among MCI, AD, FTD, and healthy controls (HC), and their correlations with dementia severity...
January 18, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28106238/choroidal-thickness-and-structural-glaucoma-parameters-in-glaucomatous-preperimetric-glaucomatous-and-healthy-eyes-using-swept-source-oct
#11
Handan Akil, Mayss Al-Sheikh, Khalil Ghasemi Falavarjani, Brian Francis, Vikas Chopra
PURPOSE: To evaluate choroidal thickness (CT) and its relationship with retinal nerve fiber layer (RNFL) and ganglion cell-inner plexiform layer thickness (GCIPLT) in glaucomatous, preperimetric glaucomatous, and healthy eyes using swept-source optical coherence tomography (SS-OCT). METHODS: Fifty eyes with primary open-angle glaucoma, 20 eyes with preperimetric glaucoma, and 20 age-matched healthy eyes were enrolled. Three-dimensional wide-field (12 × 9 mm) images were obtained using a SS-OCT instrument...
January 16, 2017: European Journal of Ophthalmology
https://www.readbyqxmd.com/read/28105103/inhibition-of-p-glycoprotein-multidrug-resistance-associated-protein-2-and-cytochrome-p450-3a4-improves-the-oral-absorption-of-octreotide-in-rats-with-portal-hypertension
#12
Xiao-Yu Sun, Zhi-Jun Duan, Zhen Liu, Shun-Xiong Tang, Yang Li, Shou-Cheng He, Qiu-Ming Wang, Qing-Yong Chang
The aim of the present study was to increase the intestinal transport of octreotide (OCT) by targeting the first-pass impact to identify a potential method for decreasing portal vein pressure (PVP) using oral OCT. Thus, the bioavailability of intestinally absorbed OCT was evaluated in normal rats and rats with portal hypertension (PH) that had been administered P-glycoprotein/multidrug resistance-associated protein 2/cytochrome P450 3A4 (P-gp/MRP2/CYP3A4) inhibitors. The mRNA and protein expression levels of P-gp, MRP2 and CYP3A4 were evaluated in normal and PH rats with or without OCT and the inhibitors using RT-PCR, western blot and immunohistochemical analyses...
December 2016: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28104208/first-in-human-evaluation-of-a-novel%C3%A2-polymer-free-drug-filled-stent-angiographic-ivus-oct-and-clinical-outcomes-from%C3%A2-the%C3%A2-revelution-study
#13
Stephen G Worthley, Alexandre Abizaid, Ajay J Kirtane, Daniel I Simon, Stephan Windecker, Sandeep Brar, Ian T Meredith, Sharad Shetty, Ajay Sinhal, Alexandra Popma Almonacid, Daniel Chamié, Akiko Maehara, Gregg W Stone
OBJECTIVES: This study sought to assess the safety and effectiveness of the drug-filled stent (DFS) (Medtronic, Santa Rosa, California) in the treatment of patients with coronary artery disease. BACKGROUND: Polymer-free drug-eluting stents have the potential to improve clinical outcomes and facilitate shorter durations of dual antiplatelet therapy. The polymer-free DFS is made from a trilayered continuous wire with an outer cobalt chromium layer, a middle tantalum layer, and an inner lumen coated with sirolimus...
January 23, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28103575/piwil2-transfected-human-fibroblasts-are-cancer-stem-cell-like-and-genetically-unstable
#14
Deying Zhang, Xin Wu, Xing Liu, Chunhong Cai, Guangping Zeng, Jan Rohozinski, Yuanyuan Zhang, Guanghui Wei, Dawei He
Uncontrolled cell proliferation and inhibition of apoptosis are considered to be vital for cancer initiation, maintenance, infiltration, metastasis and recurrence after anti-cancer therapy. Here we report the generation of a novel cell line by reprogramming child foreskin fibroblast with the full length apoptosis inhibitor gene PIWIL2. The fibroblasts transfected with PIWIL2 expressed the stem cell markers OCT-4, NANOG, SOX-2, KLF-4 and C-MYC; endoderm marker AFP and GATA6; mesoderm markers ACTA2 and BRACHYURY; and ectoderm markers NESTIN and TUBB3...
January 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/28101428/wide-field-and-highly-sensitive-angiography-based-on-optical-coherence-tomography-with-akinetic-swept-source
#15
Jingjiang Xu, Shaozhen Song, Wei Wei, Ruikang K Wang
Wide-field vascular visualization in bulk tissue that is of uneven surface is challenging due to the relatively short ranging distance and significant sensitivity fall-off for most current optical coherence tomography angiography (OCTA) systems. We report a long ranging and ultra-wide-field OCTA (UW-OCTA) system based on an akinetic swept laser. The narrow instantaneous linewidth of the swept source with its high phase stability, combined with high-speed detection in the system enable us to achieve long ranging (up to 46 mm) and almost negligible system sensitivity fall-off...
January 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28101427/dynamic-imaging-and-quantitative-analysis-of-cranial-neural-tube-closure-in-the-mouse-embryo-using-optical-coherence-tomography
#16
Shang Wang, Monica D Garcia, Andrew L Lopez, Paul A Overbeek, Kirill V Larin, Irina V Larina
Neural tube closure is a critical feature of central nervous system morphogenesis during embryonic development. Failure of this process leads to neural tube defects, one of the most common forms of human congenital defects. Although molecular and genetic studies in model organisms have provided insights into the genes and proteins that are required for normal neural tube development, complications associated with live imaging of neural tube closure in mammals limit efficient morphological analyses. Here, we report the use of optical coherence tomography (OCT) for dynamic imaging and quantitative assessment of cranial neural tube closure in live mouse embryos in culture...
January 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28101422/low-cost-hand-held-probe-for-depth-resolved-low-coherence-interferometry
#17
Paritosh Pande, Ryan L Shelton, Guillermo L Monroy, Ryan M Nolan, Stephen A Boppart
We report on the development of a low-cost hand-held low-coherence interferometric imaging system based on the principle of linear optical coherence tomography (Linear OCT), a technique which was first proposed in the early 2000s as a simpler alternative to the conventional time-domain and Fourier-domain OCT. A bench-top implementation of the proposed technique is first presented and validated. The axial resolution, SNR, and sensitivity roll-of of the system was estimated to be 5.2 μm and 80 dB, and 3.7 dB over a depth of 0...
January 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28101421/structural-and-functional-human-retinal-imaging-with-a-fiber-based-visible-light-oct-ophthalmoscope
#18
Shau Poh Chong, Marcel Bernucci, Harsha Radhakrishnan, Vivek J Srinivasan
The design of a multi-functional fiber-based Optical Coherence Tomography (OCT) system for human retinal imaging with < 2 micron axial resolution in tissue is described. A detailed noise characterization of two supercontinuum light sources with different pulse repetition rates is presented. The higher repetition rate and lower noise source is found to enable a sensitivity of 96 dB with 0.15 mW light power at the cornea and a 98 microsecond exposure time. Using a broadband (560 ± 50 nm), 90/10, fused single-mode fiber coupler designed for visible wavelengths, the sample arm is integrated into an ophthalmoscope platform, similar to current clinical OCT systems...
January 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28101419/posterior-rat-eye-during-acute-intraocular-pressure-elevation-studied-using-polarization-sensitive-optical-coherence-tomography
#19
Stanislava Fialová, Marco Augustin, Corinna Fischak, Leopold Schmetterer, Stephan Handschuh, Martin Glösmann, Michael Pircher, Christoph K Hitzenberger, Bernhard Baumann
Polarization sensitive optical coherence tomography (PS-OCT) operating at 840 nm with axial resolution of 3.8 µm in tissue was used for investigating the posterior rat eye during an acute intraocular pressure (IOP) increase experiment. IOP was elevated in the eyes of anesthetized Sprague Dawley rats by cannulation of the anterior chamber. Three dimensional PS-OCT data sets were acquired at IOP levels between 14 mmHg and 105 mmHg. Maps of scleral birefringence, retinal nerve fiber layer (RNFL) retardation and relative RNFL/retina reflectivity were generated in the peripapillary area and quantitatively analyzed...
January 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28101418/multi-surface-segmentation-of-oct-images-with-amd-using-sparse-high-order-potentials
#20
Jorge Oliveira, Sérgio Pereira, Luís Gonçalves, Manuel Ferreira, Carlos A Silva
In age-related macular degeneration (AMD), the quantification of drusen is important because it is correlated with the evolution of the disease to an advanced stage. Therefore, we propose an algorithm based on a multi-surface framework for the segmentation of the limiting boundaries of drusen: the inner boundary of the retinal pigment epithelium + drusen complex (IRPEDC) and the Bruch's membrane (BM). Several segmentation methods have been considerably successful in segmenting retinal layers of healthy retinas in optical coherence tomography (OCT) images...
January 1, 2017: Biomedical Optics Express
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