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Khaled Alzahrani, Fiona Carley, Arun Brahma, Debbie Morley, M Chantal Hillarby
The aim of this study was to standardize and investigate the changes in corneal clarity with age. Densitometry software for the Oculus Pentacam was used to examine corneal clarity at different age groups.A total of 192 eyes from 97 healthy participants were included in this cohort comparative nonrandomized, cross-sectional study. An Oculus Pentcam was used to image the cornea of healthy participants grouped by age (between 10 and 70 years old). Data from the densitometry output have been used to determine clarity in concentric zones and different depths of the cornea...
November 2017: Medicine (Baltimore)
Lisa Johansson, Daniel Sundh, Martin Nilsson, Dan Mellström, Mattias Lorentzon
Studies investigating prevalent vertebral fracture (VF) diagnosed using densitometry-based VF assessment (VFA) and associations with physical function, assessed by performance-based measures, are lacking. In this population-based study of 1027 older women, we found that prevalent VF, identified by VFA, was associated with inferior physical health, back pain and inferior physical function. PURPOSE: Several studies have investigated the associations between health-related quality of life (HRQL) and back pain with prevalent VF, detected by spine radiographs, but just a few have been population-based and have used vertebral fracture assessment (VFA) for diagnosing VF...
November 15, 2017: Osteoporosis International
Eduardo Mateos-Diaz, Priscila Sutto-Ortiz, Moulay Sahaka, Jorge A Rodriguez, Frédéric Carrière
Usual methods for the continuous assay of lipolytic enzyme activities are mainly based on the titration of free fatty acids, surface pressure monitoring or spectrophotometry using substrates labeled with specific probes. These approaches only give a partial information on the chemistry of the lipolysis reaction and additional end-point analyses are often required to quantify both residual substrate and lipolysis products. We used transmission infrared (IR) spectroscopy to monitor simultaneously the hydrolysis of phospholipids by guinea pig pancreatic lipase-related protein 2 (GPLRP2) and the release of lipolysis products...
November 11, 2017: Chemistry and Physics of Lipids
María José Pérez-Sáez, Daniel Prieto-Alhambra, Adolfo Díez-Pérez, Julio Pascual
Bone disease related to chronic kidney disease and, particularly, to kidney transplant patients is a common cause or morbidity and mortality, especially due to a higher risk of osteoporotic fractures. Despite the fact that this has been known for decades, to date, an appropriate diagnostic strategy has yet to be established. Apart from bone biopsy, which is invasive and scarcely used, no other technique is available to accurately establish the risk of fracture in kidney patients. Techniques applied to the general population, such as bone densitometry, have not been subjected to sufficient external validation and their use is not systematic...
November 11, 2017: Nefrología: Publicación Oficial de la Sociedad Española Nefrologia
Barbara Bromińska, Ewa Cyrańska-Chyrek, Barbara Kuźnar-Kamińska, Magdalena Kostrzewska, Hanna Winiarska, Nadia Sawicka-Gutaj, Ariadna Zybek-Kocik, Aleksandra Hernik, Elżbieta Wrotkowska, Zbigniew Krasiński, Marek Ruchała, Halina Batura-Gabryel
INTRODUCTION    There is growing evidence that obstructive sleep apnea (OSA) influences both bone metabolism and structure. Chitinase-3-like protein 1 (YKL-40) is a novel inflammatory and remodeling marker, which was shown to increase in OSA. YKL-40 can probably alter the bone turnover.   OBJECTIVES    Assessment of a possible interplay between YKL-40 and bone turnover markers in patients with different stages of OSA. Evaluation of the relation among bone mass, OSA severity, and YKL-40 level. PATIENTS AND METHODS    The study is based on 72 male OSA patients divided into three groups according to disease severity using apnea-hypopnea index (AHI): OSA 1 n = 18 (5 ≤ AHI < 15), OSA 2 n = 25 (15 ≤ AHI < 30), OSA 3 n = 29 (AHI ≥ 30)...
November 7, 2017: Polish Archives of Internal Medicine
Gabor Nemeth, Jasmin Hassan, Laszlo Modis, Ziad Hassan
PURPOSE: Our aim was to compare densitometry data between keratoconus and normal corneas and to assess the long-term changes in corneal backscattered light values after corneal collagen cross-linking (CXL) treatment. MATERIAL AND METHODS: Retrospective analysis was performed on 26 eyes of normal patients (age: 32.71 ± 12.68 years) and 39 eyes of keratoconus patients (28.93 ± 7.59 years) using the Pentacam HR corneal densitometry module before CXL and during the postoperative period, which lasted a mean of 2...
November 7, 2017: Current Eye Research
Gökhan Pekel, Fatih Özbakış, Alperen Bahar, Evre Pekel, Ebru Nevin Çetin
PURPOSE: Our aim was to examine the associations between the cornea morphological parameters, endothelial cell density, and anterior chamber measurements. METHODS: This observational study included 50 eyes of 50 healthy volunteers. The thicknesses of corneal epithelium, Bowman's layer, stroma, Descemet's membrane-endothelium complex, and pre-ocular tear film were measured by means of anterior segment optical coherence tomography. The keratometry (K), corneal volume (CV), corneal optical densitometry (COD), iridocorneal angle (ICA), anterior chamber depth (ACD), and anterior chamber volume (ACV) measurements were taken by the Scheimpflug anterior segment imaging...
November 7, 2017: Current Eye Research
Tanja N Smilic, Tatjana R Novakovic, Snezana R Markovic-Jovanovic, Ljiljana L J Smilic, Javorka S Mitic, Miodrag L Radunovic
In general, markers of bone formation and markers of bone resorption are changing synergistically, so the monitoring of any osteoclastic and any osteoblastic marker should reflect the rate of bone transformation. The aim of the study is to monitor the bone metabolism markers in postmenopausal women with osteoporosis and osteopenia along with the variations caused by the effects of bisphosphonate therapy. The study involved 55 women of average age of 57.95 years, with osteopenia or osteoporosis. The patients with osteoporosis were treated with bisphosphonates (75 mg once a week); the laboratory tests were performed before the treatment and 6 months later...
November 2, 2017: Journal of Clinical Densitometry
K A Ward, Z Mughal
No abstract text is available yet for this article.
November 2, 2017: Osteoporosis International
Judith Elizabeth Adams
No abstract text is available yet for this article.
November 2, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
Vito Romano, Bernhard Steger, Matthias Brunner, Abigail Kaye, Yalin Zheng, Colin E Willoughby, Stephen B Kaye
PURPOSE: To investigate a pixel densitometry index (PDI) for measuring ocular surface inflammation (OSI). METHODS: Efron's grading was performed by two independent observers. Color photographs and indocyanine green angiography were undertaken before and after instillation of phenylephrine (PE) hydrochloride 2.5%. RESULTS: A total of 15 patients with and 10 without OSI were included. PDI before and after PE was 73.29 ± 30.71 and 50.87 ± 17...
November 2, 2017: Ocular Immunology and Inflammation
Jong-Beom Park, Chanjoo Park
Study Design: In vitro cell culture model. Purpose: To investigate the effect of small interfering RNA (siRNA) on Fas expression, apoptosis, and proliferation in serum-deprived rat disc cells. Overview of Literature: Synthetic siRNA can trigger an RNA interference (RNAi) response in mammalian cells and precipitate the inhibition of specific gene expression. However, the potential utility of siRNA technology in downregulation of specific genes associated with disc cell apoptosis remains unclear...
October 2017: Asian Spine Journal
Katarzyna Bober
The subject of durability of drugs is a very important problem investigated by researches. The method of accelerated aging is very often used for stability testing. It involves the influence of temperature, humidity, and light exposure. The aim of this work is estimation of contents of diphenhydramine in its standard solutions undergoing the impact of external factors, that is, temperature and UV light. The standard solutions of diphenhydramine were prepared in distilled water. The analysis of contents of compound investigated was carried out by use of HPTLC...
2017: International Journal of Analytical Chemistry
K Tekin, M Inanc, K Ozdemir, K Sonmez, P Yilmazbas
PurposeTo evaluate the baseline and post-vitrectomy lens densitometry values by a Scheimpflug camera in eyes with epiretinal membrane that were treated with 27-G microincision vitrectomy surgery (MIVS) without tamponade and to compare the results with those in fellow healthy eyes.Patients and methodsProspective case series. The lens densitometry measurements of 24 patients, who underwent 27-G MIVS without any tamponade for the treatment of epiretinal membrane, were taken preoperatively and on the first week, first month, and third month postoperatively with Pentacam HR-Scheimpflug imaging system...
October 27, 2017: Eye
Bushra B Patoli, Jody A Winter, Atif A Patoli, Robin M Delahay, Karen A Bunting
The study of archaeal proteins and the processes to which they contribute poses particular challenges due to the often extreme environments in which they function. DNA recombination, replication and repair proteins of the halophilic euryarchaeon, Haloferax volcanii (Hvo) are of particular interest as they tend to resemble eukaryotic counterparts in both structure and activity, and genetic tools are available to facilitate their analysis. In the present study, we show using bioinformatics approaches that the Hvo RecA-like protein RadA is structurally similar to other recombinases although is distinguished by a unique acidic insertion loop...
October 26, 2017: Microbiology
Arielle Cimeno, Beth M French, Jessica M Powell, Carol Phelps, David Ayares, Natalie A O'Neill, Christopher T Laird, Richard N Pierson, Agnes M Azimzadeh, Rolf N Barth, John C LaMattina
In addition to immune barriers, molecular incompatibilities between species are predicted to limit pig liver survival in primate xenotransplantation models. Assessment and measurement of synthetic function of genetically modified porcine livers after ex vivo perfusion with human blood have not previously been described. Eight porcine livers from α1,3-galactosyl transferase knockout and human membrane cofactor (GalTKO.hCD46), six livers from GalTKO.hCD46 and N-glycolylneuraminic acid knockout (GalTKO.hCD46...
October 25, 2017: Xenotransplantation
Jure Cerar, Iztok Dogsa, Andrej Jamnik, Matija Tomšič
General as well as more specific physicochemical data obtained by studying the structure and various dynamical properties of aqueous polymer systems of methyl cellulose, [Formula: see text]carrageenan, and [Formula: see text]carrageenan are presented in graphical and numeric tabular form. The data provide basic polymer characterization info as also a specific structural and dynamical info for aqueous solutions of three industrially very important polymers (food additives) that are available commercially. The commercial availability has much bigger impact to applications, research and connected advances, when the basic substances are well characterized - a feature that is still missing for many commercially available polymers unfortunately...
December 2017: Data in Brief
Yong-Won Shin, Kyung-Il Park, Jangsup Moon, Soon-Tae Lee, Kon Chu, Sang Kun Lee, Jae-Kyu Roh, Keun-Hwa Jung
Importance: Disruption of extracellular matrix integrity is critically involved in both intracranial aneurysm and bone fragility. Furthermore, both intracranial aneurysm and osteoporosis have a female predominance, and sex hormones are considered to affect this discrepancy. Objective: To evaluate the association between bone mineral density and intracranial aneurysm. Design, Setting, and Participants: A cross-sectional study conducted with 14 328 patients who underwent brain magnetic resonance angiography and bone mineral densitometry as a part of a health examination at a specialized center for comprehensive health examination in Seoul, the largest metropolitan area in the Republic of Korea, between December 2004 and November 2015...
October 16, 2017: JAMA Neurology
Natalie Cortes, Karina Sierra, Fernando Alzate, Edison H Osorio, Edison Osorio
INTRODUCTION: Enzymatic inhibition of acetylcholinesterase (AChE) is an essential therapeutic target for the treatment of Alzheimer's disease (AD) and AChE inhibitors are the first-line drugs for it treatment. However, butyrylcholinesterase (BChE), contributes critically to cholinergic dysfunction associated with AD. Thus, the development of novel therapeutics may involve the inhibition of both cholinesterase enzymes. OBJECTIVE: To evaluate, in an integrated bioguided study, cholinesterases alkaloidal inhibitors of Amaryllidaceae species...
October 17, 2017: Phytochemical Analysis: PCA
Leda M F Lucinda, Beatriz J V Aarestrup, Maycon M Reboredo, Thais D A Pains, Raphael Z Chaves, João E P Reis, Mário J Q Louzada, Martha O Guerra
Evaluate the effect of the extract of Ginkgo biloba in the bone alkaline phosphatase, bone mineral density, in the mechanical properties of the tibia in rats with glucocorticoid-induced-osteoporosis. After osteoporosis induction, the rats were divided into five groups: Osteoporosis; EGb1 (28 mg/Kg); EGb2 (56 mg/Kg); alendronate (0.2 mg/animal) and control. The animals were treated during 20 and 30 days. The control group was compared with the osteoporosis's (Student's t-test), while the other were analyzed by ANOVA test followed by Tukey/Dunnett'T3 (p<0...
October 16, 2017: Anais da Academia Brasileira de Ciências
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