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https://www.readbyqxmd.com/read/28549295/structural-characterization-of-astaxanthin-aggregates-as-revealed-by-analysis-and-simulation-of-optical-spectra
#1
Liping Lu, Taoping Hu, Zhigang Xu
Carotenoids can self-assemble in hydrated polar solvents to form J- or H-type aggregates, inducing dramatic changes in photophysical properties. Here, we measured absorption and emission spectra of astaxanthin in ethanol-water solution using ultraviolet-visible and fluorescence spectrometers. Two types of aggregates were distinguished in mixed solution at different water contents by absorption spectra. After addition of water, all probed samples immediately formed H-aggregates with maximum blue shift of 31nm...
May 15, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28549082/pharmacokinetics-and-pharmacodynamics-of-propofol-changes-in-patients-with-frontal-brain-tumours
#2
M M Sahinovic, D J Eleveld, T Miyabe-Nishiwaki, M M R F Struys, A R Absalom
Background: Models of propofol pharmacokinetics and pharmacodynamics developed in patients without brain pathology are widely used for target-controlled infusion (TCI) during brain tumour excision operations. The goal of this study was to determine if the presence of a frontal brain tumour influences propofol pharmacokinetics and pharmacodynamics and existing PK-PD model performance. Methods: Twenty patients with a frontal brain tumour and 20 control patients received a propofol infusion to achieve an induction-emergence-induction anaesthetic sequence...
May 26, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/28546935/prognostic-factors-of-short-term-outcomes-of-intravitreal-ranibizumab-in-diabetic-macular-edema
#3
I-An Lai, Wei-Cherng Hsu, Chung-May Yang, Yi-Ting Hsieh
AIM: To evaluate the prognostic factors for short-term visual and anatomical improvement of intravitreal ranibizumab (IVR) for diabetic macular edema (DME). METHODS: Fifty-one eyes from 35 patients that received three consecutive monthly IVR for DME with moderate visual loss were retrospectively recruited; all cases had their baseline best-corrected visual acuity (BCVA) between 20/400 and 20/40. BCVA and central subfield thickness (CST) at baseline and month 3 were collected...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28546754/patient-perceived-health-related-quality-of-life-before-and-after-laparoscopic-aortobifemoral-bypass
#4
Syed Sh Kazmi, Anne H Krog, Simen T Berge, Jon O Sundhagen, Mehdi Sahba, Ragnhild S Falk
BACKGROUND: In patients operated with laparoscopic aortobifemoral bypass (LABFB) for atherosclerotic obstruction in aortoiliac segment, the main focus of the reports published during the last two decades has been morbidity and mortality. The primary objective of this study was to examine the health-related quality of life (HRQL) in these patients before and after LABFB. PATIENTS AND METHODS: Fifty consecutive patients (27 females) with Trans-Atlantic Inter-Society Consensus II, type D lesions were prospectively included...
2017: Vascular Health and Risk Management
https://www.readbyqxmd.com/read/28545794/the-natural-history-of-sleep-disturbance-among-oef-oif-veterans-with-tbi-and-ptsd-and-the-role-of-proxy-variables-in-its-measurement
#5
Paul R King, Kerry T Donnelly, Gary Warner, Michael Wade, Wilfred R Pigeon
OBJECTIVE: Sleep disturbance crosscuts post-traumatic stress disorder (PTSD) and traumatic brain injury (TBI). Though previous cross-sectional findings demonstrate a compounding effect of PTSD and TBI comorbidity, relatively little is known about the longitudinal trajectory of sleep-related complaints in veterans with TBI history and current PTSD symptoms. In this study, we explored patterns and predictors of sleep complaints in a sample of combat veterans with and without TBI and PTSD...
May 2017: Journal of Psychosomatic Research
https://www.readbyqxmd.com/read/28545715/apol1-genetic-variants-are-not-associated-with-longitudinal-blood-pressure-in-young-black-adults
#6
Teresa K Chen, Michelle M Estrella, Eric Vittinghoff, Feng Lin, Orlando M Gutierrez, Holly Kramer, Cora E Lewis, Jeffrey B Kopp, Norrina B Allen, Cheryl A Winkler, Kirsten B Bibbins-Domingo, Carmen A Peralta
Whether APOL1 polymorphisms contribute to the excess risk of hypertension among blacks is unknown. To assess this we evaluated whether self-reported race and, in blacks, APOL1 risk variants (high-risk [2 risk alleles] versus low-risk [0-1 risk allele]) were associated with longitudinal blood pressure. Blood pressure trajectories were determined using linear mixed-effects (slope) and latent class models (5 distinct groups) during 25 years of follow-up in the Coronary Artery Risk Development in Young Adults Study...
May 23, 2017: Kidney International
https://www.readbyqxmd.com/read/28545391/a-random-effects-model-for-the-identification-of-differential-splicing-reids-using-exon-and-hta-arrays
#7
Marijke Van Moerbeke, Adetayo Kasim, Willem Talloen, Joke Reumers, Hinrick W H Göhlmann, Ziv Shkedy
BACKGROUND: Alternative gene splicing is a common phenomenon in which a single gene gives rise to multiple transcript isoforms. The process is strictly guided and involves a multitude of proteins and regulatory complexes. Unfortunately, aberrant splicing events do occur which have been linked to genetic disorders, such as several types of cancer and neurodegenerative diseases (Fan et al., Theor Biol Med Model 3:19, 2006). Therefore, understanding the mechanism of alternative splicing and identifying the difference in splicing events between diseased and healthy tissue is crucial in biomedical research with the potential of applications in personalized medicine as well as in drug development...
May 25, 2017: BMC Bioinformatics
https://www.readbyqxmd.com/read/28545074/influence-of-distance-between-residence-and-health-facilities-on-non-communicable-diseases-an-assessment-over-hypertension-and-diabetes-in-bangladesh
#8
Raaj Kishore Biswas, Enamul Kabir
OBJECTIVE: This paper reflected on the prevalence of hypertension and diabetes in Bangladesh, which is spreading rapidly in low-income countries. The rationale of constructing more health centers for addressing NCDs was assessed in this paper by determining the relationship between prevalence of NCDs, particularly hypertension and diabetes, and distance to health facilities. METHODS: From BDHS (Bangladesh Health and Demographic Survey) 2011 data set, 7544 samples were analyzed to demonstrate association between Non-communicable diseases (NCD) and distance from respondents' home to health facilities like hospitals, community clinics, pharmacies or doctors' chambers, and community facilities like market, post office or cinema hall...
2017: PloS One
https://www.readbyqxmd.com/read/28544945/longitudinal-association-between-diabetes-and-cognitive-decline-the-national-health-and-aging-trends-study
#9
Alexandra M V Wennberg, Clinton E Hagen, Rebecca F Gottesman, Vadim Zipunnikov, Christopher N Kaufmann, Marilyn S Albert, George W Rebok, Judith D Kasper, Adam P Spira
Type II diabetes mellitus (DM) is associated with increased risk of dementia; however, few studies have examined the longitudinal association between DM and cognitive outcomes in large nationally representative cohorts. We investigated these associations in 7605 participants enrolled in the National Health and Aging Trends Study, a nationally representative prospective study of Medicare beneficiaries ≥65, from 2011 to 2015. Participants or proxy respondents reported DM and dementia diagnosis, and participants completed immediate and delayed recall word list learning tests and the Clock Drawing Test...
May 16, 2017: Archives of Gerontology and Geriatrics
https://www.readbyqxmd.com/read/28544580/efficacy-of-mycophenolate-mofetil-and-oral-cyclophosphamide-on-skin-thickness-post-hoc-analyses-from-the-scleroderma-lung-study-i-and-ii
#10
Rajaie Namas, Donald P Tashkin, Daniel E Furst, Holly Wilhalme, Chi-Hong Tseng, Michael D Roth, Suzanne Kafaja, Elizabeth Volkmann, Philip J Clements, Dinesh Khanna
OBJECTIVES: To assess the efficacy of mycophenolate mofetil (MMF) and cyclophosphamide (CYC) on the modified Rodnan skin score (mRSS) in participants enrolled in the Scleroderma Lung Study (SLS)-I and II. METHODS: SLS-I participants received daily oral CYC or matching placebo for one year, whereas SLS-II participants received daily MMF for 2 years or daily oral CYC for 1 year followed by placebo for second year. We assessed the impact of MMF and CYC on the mRSS in SLS-II over 24-month period...
May 23, 2017: Arthritis Care & Research
https://www.readbyqxmd.com/read/28544407/no-relevant-impact-of-ambient-temperature-on-disability-measurements-in-a-large-cohort-of-patients-with-multiple-sclerosis
#11
J-P Stellmann, K L Young, E Vettorazzi, J Pöttgen, C Heesen
BACKGROUND AND PURPOSE: Many patients with multiple sclerosis (MS) report a worsening of symptoms due to high ambient temperatures, but objective data about this association are rare and contradictory. The aim of this study was to investigate the influence of ambient temperature on standard clinical tests. METHODS: We extracted the Symbol Digit Modality Test, Nine Hole Peg Test, Timed 25 Foot Walk (T25FW), Timed Tandem Walk, Expanded Disability Status Scale (EDSS) and quality-of-life items on cognition, fatigue and depression from our clinical database and matched them to historical temperatures...
June 2017: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/28543270/acoustic-plus-electric-speech-processing-long-term-results
#12
Bruce J Gantz, Camille C Dunn, Jacob Oleson, Marlan R Hansen
OBJECTIVE: Few studies have investigated the stability of residual hearing and speech perception outcomes in individuals who were implanted with a shorter electrode device. STUDY DESIGN: Longitudinal, single-subject design. METHODS: Fifty subjects who received a Nucleus Hybrid (Cochlear, Sydney, Australia) short electrode cochlear implant (CI) and had a minimum of 2 years (and up to 15 years) of postoperative longitudinal experience were included in this study...
May 23, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28543166/chronic-emgs-in-treadmill-running-sod1-mice-reveal-early-changes-in-muscle-activation
#13
K A Quinlan, E Kajtaz, J D Ciolino, R D Imhoff-Manuel, M C Tresch, C J Heckman, V M Tysseling
To improve our understanding of early disease mechanisms and find reliable biomarkers of amyotrophic lateral sclerosis (ALS), a progressive neurodegenerative disease, we measured electromyogram (EMG) activity in hind limb muscles of SOD1G93A mice. In contrast to clinical diagnostic measures using EMGs, which are performed on quiescent patients, we monitored activity during treadmill running in order to detect presymptomatic changes in motor patterning. Chronic EMG electrodes were implanted into vastus lateralis (VL), biceps femoris posterior (BFP), lateral gastrocnemius (LG), and tibialis anterior (TA) in mice from postnatal day (P) 55-100, and results were assessed using linear mixed models...
May 24, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28542605/voxelwise-distribution-of-acute-ischemic-stroke-lesions-in-patients-with-newly-diagnosed-atrial-fibrillation-trigger-of-arrhythmia-or-only-target-of-embolism
#14
Timolaos Rizos, Andreas J Bartsch, Timothy D Johnson, Felix Dittgen, Thomas E Nichols, Uwe Malzahn, Roland Veltkamp
OBJECTIVE: Atrial fibrillation (AF) is frequently detected after ischemic stroke for the first time, and brain regions involved in autonomic control have been suspected to trigger AF. We examined whether specific brain regions are associated with newly detected AF after ischemic stroke. METHODS: Patients with acute cerebral infarctions on diffusion-weighted magnetic resonance imaging were included in this lesion mapping study. Lesions were mapped and modeled voxelwise using Bayesian Spatial Generalised Linear Mixed Modeling to determine differences in infarct locations between stroke patients with new AF, without AF and with AF already known before the stroke...
2017: PloS One
https://www.readbyqxmd.com/read/28542553/quantitative-mri-for-analysis-of-peritumoral-edema-in-malignant-gliomas
#15
Ida Blystad, J B Marcel Warntjes, Örjan Smedby, Peter Lundberg, Elna-Marie Larsson, Anders Tisell
BACKGROUND AND PURPOSE: Damage to the blood-brain barrier with subsequent contrast enhancement is a hallmark of glioblastoma. Non-enhancing tumor invasion into the peritumoral edema is, however, not usually visible on conventional magnetic resonance imaging. New quantitative techniques using relaxometry offer additional information about tissue properties. The aim of this study was to evaluate longitudinal relaxation R1, transverse relaxation R2, and proton density in the peritumoral edema in a group of patients with malignant glioma before surgery to assess whether relaxometry can detect changes not visible on conventional images...
2017: PloS One
https://www.readbyqxmd.com/read/28542536/comparison-of-matrix-frequency-doubling-technology-perimetry-and-standard-automated-perimetry-in-monitoring-the-development-of-visual-field-defects-for-glaucoma-suspect-eyes
#16
Rongrong Hu, Chenkun Wang, Lyne Racette
BACKGROUND: Perimetry is indispensable for the clinical management of glaucoma suspects. Our goal is to compare the performance of standard automated perimetry (SAP) and Matrix frequency-doubling technology (FDT) perimetry in monitoring the development of visual field (VF) defects in glaucoma suspect eyes. METHODS: Longitudinal data of paired SAP and FDT from 221 eyes of 155 glaucoma suspects enrolled in the Diagnostic Innovations in Glaucoma Study or the African Descent and Glaucoma Evaluation Study were included...
2017: PloS One
https://www.readbyqxmd.com/read/28542230/visual-field-changes-after-vitrectomy-with-internal-limiting-membrane-peeling-for-epiretinal-membrane-or-macular-hole-in-glaucomatous-eyes
#17
Shunsuke Tsuchiya, Tomomi Higashide, Kazuhisa Sugiyama
PURPOSE: To investigate visual field changes after vitrectomy for macular diseases in glaucomatous eyes. METHODS: A retrospective review of 54 eyes from 54 patients with glaucoma, who underwent vitrectomy for epiretinal membrane (ERM; 42 eyes) or macular hole (MH; 12 eyes). Standard automated perimetry (Humphrey visual field 24-2 program) was performed and analyzed preoperatively and twice postoperatively (1st and 2nd sessions; 4.7 ± 2.5, 10.3 ± 3.7 months after surgery, respectively)...
2017: PloS One
https://www.readbyqxmd.com/read/28541578/disrupted-development-and-integrity-of-frontal-white-matter-in-patients-treated-for-pediatric-medulloblastoma
#18
John O Glass, Robert J Ogg, Jung W Hyun, Julie H Harreld, Jane E Schreiber, Yimei Li, Amar J Gajjar, Wilburn E Reddick
Background.: Treatment of pediatric medulloblastoma is associated with known neurocognitive deficits that we hypothesize are caused by microstructural damage to frontal white matter (WM). Methods.: Longitudinal MRI examinations were collected from baseline (after surgery but before therapy) to 36 months in 146 patients and at 3 time points in 72 controls. Regional analyses of frontal WM volume and diffusion tensor imaging metrics were performed and verified with tract-based spatial statistics...
May 25, 2017: Neuro-oncology
https://www.readbyqxmd.com/read/28541501/satellite-based-estimates-of-long-term-exposure-to-fine-particulate-matter-are-associated-with-c-reactive-protein-in-30%C3%A2-034-taiwanese-adults
#19
Zilong Zhang, Ly-Yun Chang, Alexis K H Lau, Ta-Chien Chan, Yuan Chieh Chuang, Jimmy Chan, Changqing Lin, Wun Kai Jiang, Keith Dear, Benny C Y Zee, Eng-Kiong Yeoh, Gerard Hoek, Tony Tam, Xiang Qian Lao
Background: Particulate matter (PM) air pollution is associated with the risk of cardiovascular morbidity and mortality. However, the biological mechanism underlying the associations remains unclear. Atherosclerosis, the underlying pathology of cardiovascular disease, is a chronic inflammatory process. We therefore investigated the association of long-term exposure to fine PM (PM 2.5 ) with C-reactive protein (CRP), a sensitive marker of systemic inflammation, in a large Taiwanese population...
May 25, 2017: International Journal of Epidemiology
https://www.readbyqxmd.com/read/28541378/what-does-a-single-semen-sample-tell-you-implications-for-male-factor-infertility-research
#20
Yu-Han Chiu, Regina Edifor, Bernard A Rosner, Feiby L Nassan, Audrey J Gaskins, Lidia Minguez-Alarcon, Paige L Williams, Cigdem Tanrikut, Russ Hauser, Jorge E Chavarro
Semen parameters are variable within-man but it is unclear whether one sample could represent a man's long-term average in epidemiologic studies. Between 2005 and 2014, 329 men from a fertility clinic provided 768 semen samples in the EARTH study in Boston, Massachusetts.Total sperm count, concentration, morphology, motility, and ejaculate volume were assessed. We used linear mixed models to compare men's first samples to their long-term averages, and calculate intraclass correlation coefficients for each parameter...
May 24, 2017: American Journal of Epidemiology
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