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https://www.readbyqxmd.com/read/28087899/increasing-dietary-nitrate-has-no-effect-on-cancellous-bone-loss-or-fecal-microbiome-in-ovariectomized-rats
#1
Melissa N Conley, Cooper Roberts, Thomas J Sharpton, Urszula T Iwaniec, Norman Hord
Studies suggest diets rich in fruit and vegetables reduce bone loss, although the specific compounds responsible are unknown. Substrates for endogenous nitric oxide (NO) production, including organic nitrates and dietary nitrate, may support NO production in age-related conditions, including osteoporosis. We investigated the capability of dietary nitrate to improve NO bioavailability, reduce bone turnover and loss. Six-month-old Sprague Dawley rats [30 ovariectomized (OVX) and 10 sham-operated (sham)] were randomized into 3 groups: (1) vehicle (water) control, (2) low-dose nitrate (LDN, 0...
January 13, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28087834/environmental-deflection-the-impact-of-toxicant-exposures-on-the-aging-epigenome
#2
Joseph Kochmanski, Luke Montrose, Jaclyn M Goodrich, Dana C Dolinoy
Epigenetic drift and age-related methylation have both been used in the literature to describe changes in DNA methylation that occurs with aging. However, ambiguity remains regarding the exact definition of both of these terms, and neither of these fields of study explicitly considers the impact of environmental factors on the aging epigenome. Recent twin studies have demonstrated longitudinal, pair-specific discordance in DNA methylation patterns, suggesting an effect of the environment on age-related methylation and/or epigenetic drift...
January 13, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28087694/iso-%C3%AE-acids-bitter-components-of-beer-prevent-inflammation-and-cognitive-decline-induced-in-a-mouse-model-of-alzheimer-s-disease
#3
Yasuhisa Ano, Atsushi Dhata, Yoshimasa Taniguchi, Ayaka Hoshi, Kazuyuki Uchida, Akihiko Takashima, Hiroyuki Nakayama
Alongside the rapid growth in aging populations worldwide, prevention and therapy for age-related memory decline and dementia are in great demand to maintain a long healthy life. Here we found that iso-α-acids, hop-derived bitter compounds in beer, enhance microglial phagocytosis and suppress inflammation via activation of the peroxisome proliferator-activated receptor (PPAR-γ). In normal mice, oral administration of iso-α-acids led to a significant increase both in CD11b and CD206 double-positive anti-inflammatory type microglia (P<0...
January 13, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28087676/the-longitudinal-study-of-aging-in-human-young-adults-knowledge-gaps-and-research-agenda
#4
Terrie E Moffitt, Daniel W Belsky, Andrea Danese, Richie Poulton, Avshalom Caspi
BACKGROUND: To prevent onset of age-related diseases and physical and cognitive decline, interventions to slow human aging and extend health span must eventually be applied to people while they are still young and healthy. Yet most human aging research examines older adults, many with chronic disease, and little is known about aging in healthy young humans. METHOD: This article explains how this knowledge gap is a barrier to extending health span and puts forward the case that geroscience should invest in researching the pace of aging in young adults...
February 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28087675/dna-repair-and-mutations-during-quiescence-in-yeast
#5
Serge Gangloff, Benoit Arcangioli
Life is maintained through alternating phases of cell division and quiescence. The causes and consequences of spontaneous mutations have been extensively explored in proliferating cells, and the major sources include errors of DNA replication and DNA repair. The foremost consequences are genetic variations within a cell population that can lead to heritable diseases and drive evolution. While most of our knowledge on DNA damage response and repair has been gained through cells actively dividing, it remains essential to also understand how DNA damage is metabolized in cells which are not dividing...
January 12, 2017: FEMS Yeast Research
https://www.readbyqxmd.com/read/28087489/neurite-density-index-is-sensitive-to-age-related-differences-in-the-developing-brain
#6
Sila Genc, Charles B Malpas, Scott K Holland, Richard Beare, Timothy J Silk
PURPOSE: White matter development during childhood and adolescence is characterised by increasing white matter coherence and organisation. Commonly used scalar metrics, such as fractional anisotropy (FA), are sensitive to multiple mechanisms of white matter change and therefore unable to distinguish between mechanisms that change during development. We investigate the relationship between age and neurite density index (NDI) from neurite orientation dispersion and density imaging (NODDI), and the age-classification accuracy of NDI compared with FA, in a developmental cohort...
January 10, 2017: NeuroImage
https://www.readbyqxmd.com/read/28087407/polymeric-micelles-for-ocular-drug-delivery-from-structural-frameworks-to-recent-preclinical-studies
#7
REVIEW
Abhirup Mandal, Rohit Bisht, Ilva D Rupenthal, Ashim K Mitra
Effective intraocular drug delivery poses a major challenge due to the presence of various elimination mechanisms and physiological barriers that result in low ocular bioavailability after topical application. Over the past decades, polymeric micelles have emerged as one of the most promising drug delivery platforms for the management of ocular diseases affecting the anterior (dry eye syndrome) and posterior (age-related macular degeneration, diabetic retinopathy and glaucoma) segments of the eye. Promising preclinical efficacy results from both in-vitro and in-vivo animal studies have led to their steady progression through clinical trials...
January 10, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28086806/age-related-macular-degeneration-associated-polymorphism-rs10490924-in-arms2-results-in-deficiency-of-a-complement-activator
#8
Sven Micklisch, Yuchen Lin, Saskia Jacob, Marcus Karlstetter, Katharina Dannhausen, Prasad Dasari, Monika von der Heide, Hans-Martin Dahse, Lisa Schmölz, Felix Grassmann, Medhanie Alene, Sascha Fauser, Harald Neumann, Stefan Lorkowski, Diana Pauly, Bernhard H Weber, Antonia M Joussen, Thomas Langmann, Peter F Zipfel, Christine Skerka
BACKGROUND: Age-related macular degeneration (AMD) is the leading cause of blindness in developed countries. The polymorphism rs10490924 in the ARMS2 gene is highly associated with AMD and linked to an indel mutation (del443ins54), the latter inducing mRNA instability. At present, the function of the ARMS2 protein, the exact cellular sources in the retina and the biological consequences of the rs10490924 polymorphism are unclear. METHODS: Recombinant ARMS2 was expressed in Pichia pastoris, and protein functions were studied regarding cell surface binding and complement activation in human serum using fluoresence-activated cell sorting (FACS) as well as laser scanning microscopy (LSM)...
January 5, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/28081519/interoception-and-psychopathology-a-developmental-neuroscience-perspective
#9
REVIEW
Jennifer Murphy, Rebecca Brewer, Caroline Catmur, Geoffrey Bird
Interoception refers to the perception of the physiological condition of the body, including hunger, temperature, and heart rate. There is a growing appreciation that interoception is integral to higher-order cognition. Indeed, existing research indicates an association between low interoceptive sensitivity and alexithymia (a difficulty identifying one's own emotion), underscoring the link between bodily and emotional awareness. Despite this appreciation, the developmental trajectory of interoception across the lifespan remains under-researched, with clear gaps in our understanding...
December 23, 2016: Developmental Cognitive Neuroscience
https://www.readbyqxmd.com/read/28080911/evaluation-of-in-house-urine-dipstick-reference-laboratory-urinalysis-and-urine-protein-creatinine-ratio-from-a-colony-of-callimicos-callimico-goeldii
#10
Sarah A Cannizzo, Jennifer N Langan, Mark Warneke, Matthew Allender
This study evaluated results from an in-house (IH) laboratory dipstick, a reference laboratory (RL) urinalysis, and urine protein : creatinine (UPC) ratios from callimicos ( Callimico goeldii ). Urine was collected from 25 individuals comprising a single colony under professional care in North America and compared based on laboratory, sex, age class, and presence or absence of a normal urinalysis. Urine specific gravity and pH between laboratories were statistically different. Overall, 56% to 100% of animals had at least a trace amount of protein in their urine...
December 2016: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/28080301/assessing-social-cognition-age-related-changes-in-moral-reasoning-in-childhood-and-adolescence
#11
V Chiasson, E Vera-Estay, G Lalonde, J J Dooley, M H Beauchamp
OBJECTIVE: There is increasing recognition that socio-cognitive skills, such as moral reasoning (MR), are affected in a wide range of developmental and neuropsychological conditions. However, the lack of appropriate measures available to neuropsychologists poses a challenge for the direct assessment of these skills. This study sought to explore age-related changes in MR using an innovative visual tool and examine the developmental sensitivity of the task. METHOD: To address some of the methodological limitations of traditional measures of MR, a novel, visual task, the Socio-Moral Reasoning Aptitude Level (So-Moral), was used to evaluate MR in 216 healthy participants aged 6-20 years...
January 12, 2017: Clinical Neuropsychologist
https://www.readbyqxmd.com/read/28079929/the-impact-of-age-on-psoriasis-health-care-in-germany
#12
A Trettel, C Spehr, A Körber, M Augustin
INTRODUCTION: Inequality between age groups has been demonstrated in the prescription of biologics, yet systematic real-world data about age-related differences in psoriasis care are missing. OBJECTIVE: To investigate disparities in psoriasis characteristics by age groups and to identify potential impact on psoriasis health care. PATIENTS AND METHODS: Data analysis included 3,615 patients from the German Psoriasis registry PsoBest, which observes adult patients with moderate to severe psoriasis or psoriatic arthritis (PsA) on systemic treatment over a time period of 10 years...
January 12, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28079918/dose-evaluation-of-lamivudine-in-hiv-infected-children-aged-5%C3%A2-months-18%C3%A2-years-based-on-a-population-pharmacokinetic-analysis
#13
Esther J H Janssen, Diane E T Bastiaans, Pyry A J Välitalo, Annemarie M C van Rossum, Evelyne Jacqz-Aigrain, Hermione Lyall, Catherijne A J Knibbe, David M Burger
AIM: The objectives of this study were to characterise age-related changes in lamivudine pharmacokinetics in children and evaluate lamivudine exposure, followed by dose recommendations for subgroups in which target steady state AUC0-24h is not reached. METHODS: Population pharmacokinetic modelling was performed in NONMEM using data from two model building datasets and two external datasets (n = 180 (age 0.4-18 years, bodyweight 3.4-60.5 kg); 2,061 samples (median 12 per child); daily oral dose 60-300 mg (3...
January 12, 2017: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28079756/optical-coherence-tomography-angiography-changes-in-early-type-3-neovascularization-after-anti-vascular-endothelial-growth-factor-treatment
#14
Alexandra Miere, Giuseppe Querques, Oudy Semoun, Francesca Amoroso, Olivia Zambrowski, Thibaut Chapron, Vittorio Capuano, Eric H Souied
PURPOSE: To investigate the morphologic changes on optical coherence tomography angiography (OCTA) of treatment-naive Type 3 neovascularization secondary to exudative age-related macular degeneration after 1 year of anti-vascular endothelial growth factor therapy. METHODS: Consecutive patients diagnosed with treatment-naive early-stage Type 3 neovascularization were enrolled in this retrospective study. All patients underwent color fundus photographs/MultiColor (Heidelberg Engineering) imaging, fluorescein angiography, indocyanine green angiography, structural spectral domain OCT, and OCTA Optovue RTVue XR Avanti (Optovue) at baseline, and repeated OCTA and structural spectral domain OCT at Month 12...
January 10, 2017: Retina
https://www.readbyqxmd.com/read/28079528/assessing-the-evolution-of-redundancy-synergy-of-spontaneous-variability-regulation-with-age
#15
Alberto Porta, Vlasta Bari, Beatrice De Maria, Natália Maria Perseguini, Juliana Milan, Patricia Rehder-Santos, Vinícius Minatel, Anielle Takahashi, Aparecida Catai
We exploited a model-based Wiener-Granger causality method in the information domain for the evaluation of the transfer entropy (TE) and interaction TE (ITE), the latter taken as a measure of the net balance between redundancy and synergy, to describe the interactions between the spontaneous variability of heart period (HP) and systolic arterial pressure (SAP) and the effect of respiration (R) on both variables. Cardiac control was typified via the genuine TE from SAP to HP, that from R to HP, and the ITE from SAP and R to HP, while vascular control was characterized via the genuine TE from HP to SAP, that from R to SAP, and the ITE from HP and R to SAP...
January 12, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28079023/incidence-and-growth-of-geographic-atrophy-during-5-years-of-comparison-of-age-related-macular-degeneration-treatments-trials
#16
Juan E Grunwald, Maxwell Pistilli, Ebenezer Daniel, Gui-Shuang Ying, Wei Pan, Glenn J Jaffe, Cynthia A Toth, Stephanie A Hagstrom, Maureen G Maguire, Daniel F Martin
PURPOSE: To estimate the incidence, size, and growth rate of geographic atrophy (GA) during 5 years of follow-up among participants in the Comparison of Age-Related Macular Degeneration Treatments Trials (CATT). DESIGN: Cohort within a clinical trial. PARTICIPANTS: Participants included in CATT. METHODS: A total of 1185 CATT participants were randomly assigned to ranibizumab or bevacizumab treatment and to 3 treatment regimens...
January 2017: Ophthalmology
https://www.readbyqxmd.com/read/28078992/smoking-and-eye-pathologies-a-systemic-review-part-ii-retina-diseases-uveitis-optic-neuropathies-thyroid-associated-orbitopathy
#17
Małgorzata Nita, Andrzej Grzybowski
BACKGROUND: Tobacco smoking has detrimental influence on human health. AIM: The analysis of influence of tobacco smoking on retina diseases, uveitis, optic neuropathies, and thyroid-associated orbitopathy in adults and children. METHODS: A comprehensive review of the literature performed through MEDLINE and PubMed searches, covering the years 2000-2016. RESULTS: In adults, tobacco smoking is a strong risk factor for age-related macular degeneration, polypoidal choroidal vasculopathy, uveitis and inflamed cystoid macular edema as well as Grave`s ophthalmopathy...
January 10, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28078760/a-study-of-volumetric-variations-of-basal-nuclei-in-the-normal-human-brain-by-magnetic-resonance-imaging
#18
Amal Elkattan, Amal Mahdy, Mohamed Eltomey, Radwa Ismail
Knowledge of the effects of healthy aging on brain structures is necessary to identify abnormal changes due to diseases. Many studies have demonstrated age-related volume changes in the brain using MRI. 60 healthy individuals who had normal MRI aged from 20 years to 80 years were examined and classified into three groups: Group I: 21 persons; nine males and 12 females aging between 20-39 years old. Group II: 22 persons; 11 males and 11 females aging between 40-59 years old. Group III: 17 persons; eight males and nine females aging between 60-80 years old...
January 12, 2017: Clinical Anatomy
https://www.readbyqxmd.com/read/28078611/hyperbaric-oxygen-prevents-cognitive-impairments-in-mice-induced-by-d-galactose-by-improving-cholinergic-and-anti-apoptotic-functions
#19
Chunxia Chen, Luying Huang, Zhihuan Nong, Yaoxuan Li, Wan Chen, Jianping Huang, Xiaorong Pan, Guangwei Wu, Yingzhong Lin
Our previous study demonstrated that hyperbaric oxygen (HBO) improved cognitive impairments mainly by regulating oxidative stress, inflammatory responses and aging-related gene expression. However, a method for preventing cognitive dysfunction has yet to be developed. In the present study, we explored the protective effects of HBO on the cholinergic system and apoptosis in D-galactose (D-gal)-treated mice. A model of aging was established via systemic intraperitoneal injection of D-gal daily for 8 weeks. HBO was administered during the last 2 weeks of D-gal injection...
January 11, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28078323/genetic-architecture-of-age-related-cognitive-decline-in-african-americans
#20
Towfique Raj, Lori B Chibnik, Cristin McCabe, Andus Wong, Joseph M Replogle, Lei Yu, Sujuan Gao, Frederick W Unverzagt, Barbara Stranger, Jill Murrell, Lisa Barnes, Hugh C Hendrie, Tatiana Foroud, Anna Krichevsky, David A Bennett, Kathleen S Hall, Denis A Evans, Philip L De Jager
OBJECTIVE: To identify genetic risk factors associated with susceptibility to age-related cognitive decline in African Americans (AAs). METHODS: We performed a genome-wide association study (GWAS) and an admixture-mapping scan in 3,964 older AAs from 5 longitudinal cohorts; for each participant, we calculated a slope of an individual's global cognitive change from neuropsychological evaluations. We also performed a pathway-based analysis of the age-related cognitive decline GWAS...
February 2017: Neurology. Genetics
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