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https://www.readbyqxmd.com/read/29045874/dynamic-scaling-analysis-of-molecular-motion-within-the-lat-grb2-sos-protein-network-on%C3%A2-membranes
#1
William Y C Huang, Han-Kuei Chiang, Jay T Groves
Biochemical signaling pathways often involve proteins with multiple, modular interaction domains. Signaling activates binding sites, such as by tyrosine phosphorylation, which enables protein recruitment and growth of networked protein assemblies. Although widely observed, the physical properties of the assemblies, as well as the mechanisms by which they function, remain largely unknown. Here we examine molecular mobility within LAT:Grb2:SOS assemblies on supported membranes by single-molecule tracking. Trajectory analysis reveals a discrete temporal transition to subdiffusive motion below a characteristic timescale, indicating that the LAT:Grb2:SOS assembly has the dynamical structure of a loosely entangled polymer...
October 17, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/29045793/adsorption-removal-of-glycidyl-esters-from-palm-oil-and-oil-model-solution-by-using-acid-washed-oil-palm-wood-based-activated-carbon-kinetic-and-mechanism-study
#2
Weiwei Cheng, Guoqin Liu, Xuede Wang, Lipeng Han
Acid-washed oil palm wood-based activated carbon (OPAC) has been investigated for its potential application as a promising adsorbent in the removal of glycidyl esters (GEs) from both palm oil and oil model (hexadecane) solution. It was observed that the removal rate of GEs in palm oil was up to >95%, which was significantly higher than other adsorbents used in this study. In batch adsorption system, the adsorption efficiency and performance of acid-washed OPAC were evaluated as a function of several experimental parameters such as contact time, initial glycidyl palmitate (PGE) concentration, adsorbent dose, and temperature...
October 18, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29045742/white-leaf-and-panicle-2-encoding-a-pep-associated-protein-is-required-for-chloroplast-biogenesis-under-heat-stress-in-rice
#3
Yusong Lv, Gaoneng Shao, Jiehua Qiu, Guiai Jiao, Zhonghua Sheng, Lihong Xie, Yawen Wu, Shaoqing Tang, Xiangjin Wei, Peisong Hu, Robert Sharwood
The plastid-encoded RNA polymerase (PEP) plays an important role in the transcription machinery of mature chloroplasts, yet details of its function remain elusive in rice. Here, we identified a novel PEP-associated protein (PAP), WLP2, based on its two allelic white leaf and panicle mutants, wlp2s and wlp2w. The two mutants were albino lethal at high temperatures and showed decreased chlorophyll accumulation, abnormal chloroplast ultrastructure, and attenuated photosynthetic activity. Map-based cloning suggested that WLP2 encodes a putative pfkB-type carbohydrate kinase family protein, which is homologous to fructokinase-like 1 (AtFLN1) in Arabidopsis...
October 16, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/29045722/subjective-age-and-cystatin-c-among-older-adults
#4
Yannick Stephan, Angelina R Sutin, Antonio Terracciano, Shevaun Neupert
Objective: Cystatin C (CysC) is a marker of kidney function that is relevant for the health and cognition of older adults. Little is known about the link between psychological factors and CysC. Therefore, the present study examined whether subjective age is related to CysC level and changes in CysC over time. Method: Participants were 5,066 individuals drawn from the Health and Retirement Study aged from 50 to 107 years (60% women, mean age = 69.36 years, SD = 9...
October 16, 2017: Journals of Gerontology. Series B, Psychological Sciences and Social Sciences
https://www.readbyqxmd.com/read/29045612/fractional-flow-reserve-and-myocardial-perfusion-by-computed-tomography-a-guide-to-clinical-application
#5
Joanne D Schuijf, Brian S Ko, Marcelo F Di Carli, Jacqueline Hislop-Jambrich, Abdul-Rahman Ihdayhid, Sujith K Seneviratne, João A C Lima
The aim of this paper is to provide a guide to the clinical application of the functional computed tomography (CT) techniques fractional flow reserve (CT FFR) and myocardial perfusion (CTP) in patients presenting for the evaluation of coronary artery disease (CAD). Both techniques have recently been introduced to complement coronary CT angiography (CTA) with physiological information. Evidence supporting their diagnostic accuracy accumulates at a fast pace, and both techniques are moving from research tools to clinical applications for specific subgroups of patients...
October 17, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/29045582/strategies-to-reduce-injuries-and-develop-confidence-in-elders-stride-a-cluster-randomized-pragmatic-trial-of-a-multifactorial-fall-injury-prevention-strategy-design-and-methods
#6
Shalender Bhasin, Thomas M Gill, David B Reuben, Nancy K Latham, Jerry H Gurwitz, Patricia Dykes, Siobhan McMahon, Thomas W Storer, Pamela W Duncan, David A Ganz, Shehzad Basaria, Michael E Miller, Thomas G Travison, Erich J Greene, James Dziura, Denise Esserman, Heather Allore, Martha B Carnie, Maureen Fagan, Catherine Hanson, Dorothy Baker, Susan L Greenspan, Neil Alexander, Fred Ko, Albert L Siu, Elena Volpi, Albert W Wu, Jeremy Rich, Stephen C Waring, Robert Wallace, Carri Casteel, Jay Magaziner, Peter Charpentier, Charles Lu, Katy Araujo, Haseena Rajeevan, Scott Margolis, Richard Eder, Joanne M McGloin, Eleni Skokos, Jocelyn Wiggins, Lawrence Garber, Steven B Clauser, Rosaly Correa-De-Araujo, Peter Peduzzi
Background: Fall injuries are a major cause of morbidity and mortality among older adults. We describe the design of a pragmatic trial to compare the effectiveness of an evidence-based, patient-centered multifactorial fall injury prevention strategy to an enhanced usual care. Methods: Strategies to Reduce Injuries and Develop Confidence in Elders (STRIDE) is a 40-month cluster-randomized, parallel-group, superiority, pragmatic trial being conducted at 86 primary care practices in 10 healthcare systems across USA...
October 14, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/29045492/multitasking-in-older-adults-with-type-2-diabetes-a-cross-sectional-analysis
#7
Jason L Rucker, Joan M McDowd, Jonathan D Mahnken, Jeffrey M Burns, Carla H Sabus, Amanda J Britton-Carpenter, Nora B Utech, Patricia M Kluding
BACKGROUND AND PURPOSE: Deficits in the ability to multitask contribute to gait abnormalities and falls in many at-risk populations. However, it is unclear whether older adults with type 2 diabetes mellitus (DM) also demonstrate impairments in multitasking. The purpose of this study was to compare multitasking performance in cognitively intact older adults with and without DM and explore its relationship to measures of gait and functional ability. METHODS: We performed a cross-sectional analysis of 40 individuals aged 60 and older with type 2 DM and a matched group of 40 cognitively intact older adults without DM...
2017: PloS One
https://www.readbyqxmd.com/read/29045487/the-psychosocial-impact-of-leg-ulcers-in-patients-with-sickle-cell-disease-i-don-t-want-them-to-know-my-little-secret
#8
Nkeiruka I Umeh, Brittany Ajegba, Ashley J Buscetta, Khadijah E Abdallah, Caterina P Minniti, Vence L Bonham
BACKGROUND: Sickle cell disease (SCD) impacts millions of individuals worldwide and more than 100,000 people in the United States. Leg ulcers are the most common cutaneous manifestation of SCD. The health status of individuals living with chronic leg ulcers is not only influenced by clinical manifestations such as pain duration and intensity, but also by psychosocial factors. Garnering insights into the psychosocial impact can provide a more holistic view of their influence on quality of life...
2017: PloS One
https://www.readbyqxmd.com/read/29045379/discovery-of-new-gpcr-ligands-to-illuminate-new-biology
#9
Bryan L Roth, John J Irwin, Brian K Shoichet
Although a plurality of drugs target G-protein-coupled receptors (GPCRs), most have emerged from classical medicinal chemistry and pharmacology programs and resemble one another structurally and functionally. Though effective, these drugs are often promiscuous. With the realization that GPCRs signal via multiple pathways, and with the emergence of crystal structures for this family of proteins, there is an opportunity to target GPCRs with new chemotypes and confer new signaling modalities. We consider structure-based and physical screening methods that have led to the discovery of new reagents, focusing particularly on the former...
November 2017: Nature Chemical Biology
https://www.readbyqxmd.com/read/29045260/encopresis-plus
#10
DePorres Cormier, Marie Reilly, Amy Young, Marilyn Augustyn
Dexter is a 12-year-old boy who presents with his maternal grandmother for follow-up to primary care for secondary encopresis. Dexter presented, 18 months ago, with a 3-month history of secondary encopresis. At that time, a comprehensive assessment revealed functional constipation resulting in encopresis. Dexter's symptoms resolved with a combination of medication management and behavioral strategies; laxatives were discontinued 12 months ago.Dexter's grandmother reports that for the past 6 months, her grandson developed encopresis once again...
October 17, 2017: Journal of Developmental and Behavioral Pediatrics: JDBP
https://www.readbyqxmd.com/read/29045254/nutritional-interventions-in-sarcopenia-where-do-we-stand
#11
Jean Woo
PURPOSE OF REVIEW: To document recent evidence regarding the role of nutrition as an intervention for sarcopenia. RECENT FINDINGS: A review of seven randomized controlled trials (RCTs) on beta-hydroxy-beta-methylbutyrate (HMB) alone on muscle loss in 147 adults showed greater muscle mass gain in the intervention group, but no benefit in muscle strength and physical performance measures. Three other review articles examined nutrition and exercise as combined intervention, and suggest enhancement of benefits of exercise by nutrition supplements (energy, protein, vitamin D)...
October 17, 2017: Current Opinion in Clinical Nutrition and Metabolic Care
https://www.readbyqxmd.com/read/29045232/imaging-neoadjuvant-therapy-response-in-breast-cancer
#12
Amy M Fowler, David A Mankoff, Bonnie N Joe
The use of neoadjuvant systemic therapy in the treatment of breast cancer patients is increasing beyond the scope of locally advanced disease. Imaging provides important information in assessing response to therapy as a complement to conventional tumor measurements via physical examination. The purpose of this article is to discuss the advantages and limitations of current assessment methods, as well as review functional and molecular imaging approaches being investigated as emerging techniques for evaluating neoadjuvant therapy response for patients with primary breast cancer...
November 2017: Radiology
https://www.readbyqxmd.com/read/29045051/minimum-performance-on-clinical-tests-of-physical-function-to-predict-walking-6000-steps-day-in-knee-osteoarthritis-an-observational-study
#13
Hiral Master, Louise M Thoma, Meredith B Christiansen, Emily Polakowski, Laura A Schmitt, Daniel K White
OBJECTIVE: Evidence of physical function difficulties, such as difficulty rising from a chair, may limit daily walking for people with knee osteoarthritis (OA). The purpose of this study was to identify minimum performance thresholds on clinical tests of physical function predictive to walk ≥6000 steps/day. This benchmark is known to discriminate people with knee OA who develop functional limitation over time from those who do not. METHODS: Using data from the Osteoarthritis Initiative, we quantified daily walking as average steps/day from an accelerometer (Actigraph GTM1) worn for >10 hours/day over one week...
October 17, 2017: Arthritis Care & Research
https://www.readbyqxmd.com/read/29045021/reduced-dietary-intake-of-micronutrients-with-antioxidant-properties-negatively-impacts-muscle-health-in-aged-mice
#14
Miriam van Dijk, Francina J Dijk, Anita Hartog, Klaske van Norren, Sjors Verlaan, Ardy van Helvoort, Richard T Jaspers, Yvette Luiking
BACKGROUND: Inadequate intake of micronutrients with antioxidant properties is common among older adults and has been associated with higher risk of frailty, adverse functional outcome, and impaired muscle health. However, a causal relationship is less well known. The aim was to determine in old mice the impact of reduced dietary intake of vitamins A/E/B6/B12/folate, selenium, and zinc on muscle mass, oxidative capacity, strength, and physical activity (PA) over time. METHODS: Twenty-one-month-old male mice were fed either AIN-93-M (control) or a diet low in micronutrients with antioxidant properties (=LOWOX-B: 50% of mouse recommended daily intake of vitamins A, E, B6, and B12, folate, selenium, and zinc) for 4 months...
October 16, 2017: Journal of Cachexia, Sarcopenia and Muscle
https://www.readbyqxmd.com/read/29045002/sufficient-vitamin-k-status-combined-with-sufficient-vitamin-d-status-is-associated-with-better-lower-extremity-function-a-prospective-analysis-of-two-knee-osteoarthritis-cohorts
#15
M Kyla Shea, Richard F Loeser, Timothy E McAlindon, Denise K Houston, Stephen B Kritchevsky, Sarah L Booth
OBJECTIVE: Vitamins K and D are important for the function of vitamin K-dependent proteins in joint tissues. It is unclear if these nutrients are mutually important to functional outcomes related to knee osteoarthritis (OA). We evaluated the association of vitamin K and D sufficiency with lower-extremity function in the Health, Aging Body Composition Knee OA Sub-study (Health ABC) and conducted a replication analysis in an independent cohort, the Osteoarthritis Initiative (OAI). METHODS: In Health ABC (60% female, 75±3 years) baseline nutrient status was measured using circulating vitamin K and 25(OH)D...
October 17, 2017: Arthritis Care & Research
https://www.readbyqxmd.com/read/29044770/effects-of-forced-passive-and-voluntary-exercise-on-spinal-motoneurons-changes-after-peripheral-nerve-injury
#16
Ariadna Arbat-Plana, Xavier Navarro, Esther Udina
After peripheral nerve injury, there are important changes at the spinal level that can lead to disorganization of the central circuitry and thus, compromise functional recovery even if axons are able to successfully regenerate and reinnervate their target organs. Physical rehabilitation is a promising strategy to modulate these plastic changes and thus, to improve functional recovery after damage of the nervous system. Forced exercise in a treadmill is able to partially reverse the synaptic stripping and the loss of perineuronal nets that motoneurons suffer after peripheral nerve injury in animal models...
October 17, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/29044679/predictors-of-long-term-bladder-management-in-spinal-cord-injury-patients-upper-extremity-function-may-matter-most
#17
Dimitar V Zlatev, Kazuko Shem, Christopher S Elliott
INTRODUCTION: Clean intermittent catheterization (CIC) is the gold standard for neurogenic bladder management in most patients with spinal cord injury (SCI). There is nonetheless a lack of long-term adherence to CIC, with up to 50% discontinuance at 5-year follow-up. We hypothesize that limitations in upper extremity (UE) motor function represent a strong predictor for long-term CIC adoption. METHODS: We assessed Forms I and II data from the 2000-2013 National SCI Database...
October 17, 2017: Neurourology and Urodynamics
https://www.readbyqxmd.com/read/29044625/toward-an-automated-analysis-of-exchange-pathways-in-spin-coupled-systems
#18
Torben Steenbock, Carmen Herrmann
Understanding (super-)exchange coupling between local spins is an important task in theoretical chemistry and solid-state physics. We show that a Green's-function approach introduced earlier (Liechtenstein et al., J. Phys. F 1984, 14, L125; Steenbock et al., J. Chem. Theory Comput. 2015, 11, 5651) can be used for analyzing exchange coupling pathways in an automated fashion rather than by visual inspection of molecular orbitals. We demonstrate the capabilities of this approach by comparing it to previously published pathway analyses for hydroxy-bridged dinuclear copper complexes and an oxo-bridged dinuclear manganese complex, and employ it for discriminating between through-space and through-bond pathways in a naphthalene-bridged bisnickelocene complex...
October 17, 2017: Journal of Computational Chemistry
https://www.readbyqxmd.com/read/29044457/secondary-prevention-medication-use-after-myocardial-infarction-in-u-s-nursing-home-residents
#19
Andrew R Zullo, Sadia Sharmin, Yoojin Lee, Lori A Daiello, Nishant R Shah, W John Boscardin, David D Dore, Sei J Lee, Michael A Steinman
BACKGROUND/OBJECTIVES: Secondary prevention medications are recommended for older adults after acute myocardial infarction (AMI), but little is known about whether nursing home (NH) residents receive these medications. The objective was to evaluate new use of secondary prevention medications after AMI in NH residents who were previously nonusers and to evaluate what factors were associated with use. DESIGN: Retrospective cohort using linked national Minimum Data Set assessments; Online Survey, Certification and Reporting records; and Medicare claims...
October 17, 2017: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/29044345/first-report-of-granulicatella-sp-endocarditis-in-a-kidney-transplant-patient
#20
Flávio Jota de Paula, Precil Diego Miranda de Menezes Neves, Ramaiane Aparecida Bridi, Alice Tung Wan Song, Elias David-Neto
Granulicatella and Abiotrophia are genera of fastidious Gram-positive cocci commensal of the oral, genitourinary, and intestinal flora. We report the first case of infective endocarditis caused by Granulicatella sp. in a kidney transplant recipient. A 67-year-old male kidney transplant recipient was admitted to the hospital for investigation of fever, abdominal pain, and diarrhea. On physical examination, he was dehydrated. Laboratory tests identified impaired renal function (creatinine level of 15.5 mg/dl; reference, 3...
July 2017: Jornal Brasileiro de Nefrologia: ʹorgão Oficial de Sociedades Brasileira e Latino-Americana de Nefrologia
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