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https://www.readbyqxmd.com/read/29156876/the-comparison-of-various-disinfectants-efficacy-on-staphylococcus-aureus-and-pseudomonas-aeruginosa-biofilm-layers
#1
Hatice Köse, Nur Yapar
Background/aim: Because biofilms are resistant to antibiotics and biocides, they usually cause chronic persistent infections, which are arduous to cure and have high mortality and morbidity. Our study aimed to investigate the efficiency of orthophthalaldehyde, peracetic acid, hydrogen peroxide, and sodium hypochlorite on Pseudomonas aeruginosa and Staphylococcus aureus biofilm layers and live microbial cells. Materials and methods: Biofilm layers were determined by crystal violet assay and live microbial cells were determined using a resazurin assay...
August 23, 2017: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/29156630/anti-bacteria-and-microecosystem-regulating-effects-of-dental-implant-coated-with-dimethylaminododecyl-methacrylate
#2
Bolei Li, Yang Ge, Yao Wu, Jing Chen, Hockin H K Xu, Minggang Yang, Mingyun Li, Biao Ren, Mingye Feng, Michael D Weir, Xian Peng, Lei Cheng, Xuedong Zhou
The effects of dimethylaminododecyl methacrylate (DMADDM) modified titanium implants on bacterial activity and microbial ecosystem of saliva-derived biofilm were investigated for the first time. Titanium discs were coated with DMADDM solutions at mass fractions of 0 mg/mL (control), 1, 5 and 10 mg/mL, respectively. Biomass accumulation and metabolic activity of biofilms were tested using crystal violet assay and MTT (3-(4,5-Dimethyl-thiazol-2-yl)-2,5-diphenyltetrazolium bromide) assay. 16S rRNA gene sequencing was performed to measure the microbial community...
November 20, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29156538/combined-effects-of-simulated-microgravity-and-radiation-exposure-on-osteoclast-cell-fusion
#3
Srinivasan Shanmugarajan, Ye Zhang, Maria Moreno-Villanueva, Ryan Clanton, Larry H Rohde, Govindarajan T Ramesh, Jean D Sibonga, Honglu Wu
The loss of bone mass and alteration in bone physiology during space flight are one of the major health risks for astronauts. Although the lack of weight bearing in microgravity is considered a risk factor for bone loss and possible osteoporosis, organisms living in space are also exposed to cosmic radiation and other environmental stress factors. As such, it is still unclear as to whether and by how much radiation exposure contributes to bone loss during space travel, and whether the effects of microgravity and radiation exposure are additive or synergistic...
November 18, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29156493/virtual-reality-for-stroke-rehabilitation
#4
REVIEW
Kate E Laver, Belinda Lange, Stacey George, Judith E Deutsch, Gustavo Saposnik, Maria Crotty
BACKGROUND: Virtual reality and interactive video gaming have emerged as recent treatment approaches in stroke rehabilitation with commercial gaming consoles in particular, being rapidly adopted in clinical settings. This is an update of a Cochrane Review published first in 2011 and then again in 2015. OBJECTIVES: Primary objective: to determine the efficacy of virtual reality compared with an alternative intervention or no intervention on upper limb function and activity...
November 20, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29156489/an-adherent-mucus-layer-attenuates-the-genotoxic-effect-of-colibactin
#5
Christian Reuter, Mona Alzheimer, Heike Walles, Tobias A Oelschlaeger
The human gastrointestinal tract is a complex ecosystem in which epithelial cells and microorganisms of the intestinal microbiota live in symbiosis. Certain members of the microbiota, in particular Escherichia coli strains of the B2 phylotype, carry the polyketide synthase (pks)-island encoding the genotoxin colibactin. Colibactin is a non-ribosomal peptide (NRP) or polyketide (PK)-NRP hybrid of still unsolved structure, which induces DNA double strand breaks (DSBs) in eukaryotic cells. However, direct contact between live bacteria and host cell is required in order to elicit these genotoxic effects...
November 20, 2017: Cellular Microbiology
https://www.readbyqxmd.com/read/29156451/impact-of-stressful-life-events-on-patients-with-chronic-obstructive-pulmonary-disease
#6
Tsung Yu, Anja Frei, Gerben Ter Riet, Milo A Puhan
BACKGROUND: There is a general notion that stressful life events may cause mental and physical health problems. OBJECTIVES: We aimed to describe stressful life events reported by patients with chronic obstructive pulmonary disease (COPD) and to assess their impact on health outcomes and behaviors. METHODS: Two hundred and sixty-six primary care patients who participated in the ICE COLD ERIC cohort study were asked to document any stressful life events in the past 3 years...
November 1, 2017: Respiration; International Review of Thoracic Diseases
https://www.readbyqxmd.com/read/29156415/patterns-of-food-and-physical-activity-environments-related-to-children-s-food-and-activity-behaviors-a-latent-class-analysis
#7
Robin S DeWeese, Punam Ohri-Vachaspati, Marc A Adams, Jonathan Kurka, Seung Yong Han, Michael Todd, Michael J Yedidia
Relationships between food and physical activity (PA) environments and children's related behaviors are complex. Latent class analyses derived patterns from proximity to healthy and unhealthy food outlets, PA facilities and parks, and counts of residential dwellings and intersections. Regression analyses examined whether derived classes were related to food consumption, PA, and overweight among 404 low-income children. Compared to children living in Low PA-Low Food environments, children in High Intersection&Parks-Moderate Density&Food, and High Density-Low Parks-High Food environments, had significantly greater sugar-sweetened beverage consumption (ps<0...
November 17, 2017: Health & Place
https://www.readbyqxmd.com/read/29156358/peer-norms-moderate-the-association-between-mental-health-and-sexual-risk-behaviors-among-young-men-living-in-dar-es-salaam-tanzania
#8
L M Hill, J Moody, N C Gottfredson, L J Kajula, B W Pence, V F Go, S Maman
BACKGROUND: Young men living in Dar es Salaam's informal settlements face environmental stressors that may expose them to multiple determinants of HIV risk including poor mental health and risky sexual behavior norms. We aimed to understand how these co-occurring risk factors not only independently affect men's condom use and sexual partner concurrency, but also how they interact to shape these risk behaviors. METHODS: Participants in the study were male members of 59 social groups known as "camps" in Dar es Salaam, Tanzania...
November 4, 2017: Social Science & Medicine
https://www.readbyqxmd.com/read/29156272/a-quantitative-assessment-of-distributions-and-sources-of-tropospheric-halocarbons-measured-in-singapore
#9
Sayantan Sarkar, Wei Hong Fan, Shiguo Jia, Donald R Blake, Jeffrey S Reid, Puji Lestari, Liya E Yu
This work reports the first ground-based atmospheric measurements of 26 halocarbons in Singapore, an urban-industrial city-state in Southeast (SE) Asia. A total of 166 whole air canister samples collected during two intensive 7 Southeast Asian Studies (7SEAS) campaigns (August-October 2011 and 2012) were analyzed for C1-C2 halocarbons using gas chromatography-electron capture/mass spectrometric detection. The halocarbon dataset was supplemented with measurements of selected non-methane hydrocarbons (NMHCs), C1-C5 alkyl nitrates, sulfur gases and carbon monoxide to better understand sources and atmospheric processes...
November 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29156123/a-nanopore-based-label-free-and-real-time-monitoring-assay-for-dna-methyltransferase-activity-and-inhibition
#10
Sana Rauf, Ling Zhang, Asghar Ali, Jalal Ahmad, Yang Liu, Jinghong Li
DNA methylation catalyzed by DNA methyltransferase plays an important role in many biological processes. However, conventional assays proposed for DNA methyltransferase activity are laborious and discontinuous. We describe a novel method for real-time monitoring of the activity and kinetics of Escherichia coli DNA adenine methyltransferase (Dam), using nanopore technique coupled with enzyme-linkage reactions. A double-stranded DNA probe AB having a recognition sequence 5'-GATC-3' for both Dam and MboI restriction endonuclease was prepared...
November 20, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/29155845/effect-of-actigraph-s-low-frequency-extension-for-estimating-steps-and-physical-activity-intensity
#11
Yuri Feito, Lyndsey M Hornbuckle, Lauren A Reid, Scott E Crouter
This study examined the effects of the ActiGraph's (AG) low-frequency extension (LFE) filter on steps and physical activity classification in the free-living environment. Thirty-four African-American women (age, 24.5±5.2 years; BMI, 24.9±4.5 kg/m2) had daily activity measured simultaneously with an AG-GT3X+ accelerometer and a New Lifestyles NL-800 pedometer for seven days. Steps per day (steps/day) and time (minutes/day) spent in sedentary, light, and moderate-to-vigorous physical activity (MVPA) were examined with and without the LFE filter (AG-LFE and AG-N, respectively)...
2017: PloS One
https://www.readbyqxmd.com/read/29155748/using-in-vitro-live-cell-imaging-to-explore-chemotherapeutics-delivered-by-lipid-based-nanoparticles
#12
Ann L B Seynhaeve, Timo L M Ten Hagen
Conventional imaging techniques can provide detailed information about cellular processes. However, this information is based on static images in an otherwise dynamic system, and successive phases are easily overlooked or misinterpreted. Live-cell imaging and time-lapse microscopy, in which living cells can be followed for hours or even days in a more or less continuous fashion, are therefore very informative. The protocol described here allows for the investigation of the fate of chemotherapeutic nanoparticles after the delivery of doxorubicin (dox) in living cells...
November 1, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29155265/neuroanatomical-distribution-and-function-of-the-vasopressin-v1b-receptor-in-the-rat-brain-deciphered-using-specific-fluorescent-ligands
#13
Maithé Corbani, Rafik Marir, Miguel Trueba, Magda Chafai, Anne Vincent, Amélie M Borie, Michel G Desarménien, Yoichi Ueta, Csaba Tomboly, Aleksandra Olma, Maurice Manning, Gilles Guillon
It is now accepted that vasopressin, through V1A/V1B receptors, centrally regulates cognitive functions such as memory, affiliation, stress, fear and depression. However, the respective roles of these receptor isoforms and their contribution to stress-related pathologies remain uncertain. The development of new therapeutic treatments requires a precise knowledge of the distribution of these receptors within the brain, which has been so far hampered by the lack of selective V1B markers. In the present study, we have determined the pharmacological properties of three new potent rat V1B fluorescent ligands and demonstrated that they constitute valuable tools for simultaneous visualization and activation of native V1B receptors in living rat brain tissue...
November 16, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/29155243/the-24-25-to-25-hydroxyvitamin-d-ratio-and-fracture-risk-in-older-adults-the-cardiovascular-health-study
#14
Charles Ginsberg, Ronit Katz, Ian H de Boer, Bryan R Kestenbaum, Michel Chonchol, Michael G Shlipak, Mark J Sarnak, Andrew N Hoofnagle, Dena E Rifkin, Pranav S Garimella, Joachim H Ix
25-hydroxyvitamin D [25(OH)D] may not optimally indicate vitamin D receptor activity. Higher concentrations of its catabolic product 24,25-dihydroxyvitmin D [24,25(OH)2D] and a higher ratio of 24,25(OH)2D to 25(OH)D (the vitamin D metabolite ratio [VMR]) may provide additional information on receptor activity. We compared the strength of associations of these markers with serum PTH concentrations, hip bone mineral density (BMD), and risk of incident hip fracture in community-living older participants in the Cardiovascular Health Study...
November 16, 2017: Bone
https://www.readbyqxmd.com/read/29154745/differential-gene-expression-in-chicken-primary-b-cells-infected-ex-vivo-with-attenuated-and-very-virulent-strains-of-infectious-bursal-disease-virus-ibdv
#15
Katherine L Dulwich, Efstathios S Giotis, Alice Gray, Venugopal Nair, Michael A Skinner, Andrew J Broadbent
Infectious bursal disease virus (IBDV) belongs to the family Birnaviridae and is economically important to the poultry industry worldwide. IBDV infects B cells in the bursa of Fabricius (BF), causing immunosuppression and morbidity in young chickens. In addition to strains that cause classical Gumboro disease, the so-called 'very virulent' (vv) strain, also in circulation, causes more severe disease and increased mortality. IBDV has traditionally been controlled through the use of live attenuated vaccines, with attenuation resulting from serial passage in non-lymphoid cells...
November 20, 2017: Journal of General Virology
https://www.readbyqxmd.com/read/29154543/fluorogenic-targeting-of-voltage-sensitive-dyes-to-neurons
#16
Pei Liu, Vincent Grenier, Wootack Hong, Vikram R Muller, Evan W Miller
We present a method to target voltage-sensitive fluorescent dyes to specified cells using an enzyme-catalyzed fluorogenic reaction on cell surfaces. The dye/enzyme hybrids are composed of a photoinduced electron transfer (PeT)-based fluorescent voltage indicator and a complementary enzyme expressed on the cell surface. Action of the exogenous enzyme on the dye results in fluorogenic activation of the dye, enabling fast voltage imaging in defined neurons with sensitivity surpassing those of purely genetically encoded approaches...
November 20, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29153839/asymmetry-between-activation-and-deactivation-during-a-transcriptional-pulse
#17
Lee S S Dunham, Hiroshi Momiji, Claire V Harper, Polly J Downton, Kirsty Hey, Anne McNamara, Karen Featherstone, David G Spiller, David A Rand, Bärbel Finkenstädt, Michael R H White, Julian R E Davis
Transcription in eukaryotic cells occurs in gene-specific bursts or pulses of activity. Recent studies identified a spectrum of transcriptionally active "on-states," interspersed with periods of inactivity, but these "off-states" and the process of transcriptional deactivation are poorly understood. To examine what occurs during deactivation, we investigate the dynamics of switching between variable rates. We measured live single-cell expression of luciferase reporters from human growth hormone or human prolactin promoters in a pituitary cell line...
November 13, 2017: Cell Systems
https://www.readbyqxmd.com/read/29153654/-68-ge-ga-activity-standardization-by-4%C3%AF-%C3%AE-ls-%C3%AE-nai-tl-anticoincidence-counting-measurements
#18
C J da Silva, P A L da Cruz, A Iwahara, E M de Oliveira, J Dos S Loureiro, L Tauhata, Ronaldo L da Silva, R Poledna, R T Lopes
In this work, a (68)(Ge+Ga) solution has been standardized at the National Institute of Ionizing Radiation Metrology (LNMRI), in Brazil, in the frame of an international key comparison CCRI(II)-K2.Ge-68 piloted by National Institute of Standards and Technology (NIST/USA). The 4πβ(LS)-γ(NaI(Tl)) anticoincidence method with live-time and extended dead-time was used and its result was validated by 4πβ(LS)-γ(NaI(Tl)) coincidence counting and liquid scintillation counting using the Triple to Double Coincidence Ratio (TDCR) method...
October 12, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/29153478/reliability-of-upper-limb-and-trunk-joint-angles-in-healthy-adults-during-activities-of-daily-living
#19
Susannah M Engdahl, Deanna H Gates
Assessments of upper limb performance should require participants to perform tasks that challenge the limits of their ability. In order to select appropriate tasks, it is important to know which joints are used to perform the movement and how reliably those movements can be measured. The purpose of this work was to quantify the reliability of upper limb and trunk joint angles in healthy adults during common activities of daily living (ADLs). Nineteen participants performed six ADLs with the right arm (applying deodorant, turning a doorknob, answering a desk telephone, placing a pushpin in a bulletin board, wiping a plate with a towel, and pouring water from a pitcher) during two separate sessions...
November 8, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29153291/structural-perturbation-by-arsenic-triggers-the-aggregation-of-hen-egg-white-lysozyme-by-promoting-oligomers-formation
#20
Neelakant Varma, Inderbhan Singh, Mohinder Singh Dahiya, Vijay Kumar Ravi, Satish Kumar
Arsenic trioxide is one of the most common metallic pollutants entering the food chain both by human activities and nature. Its entry inside the living organism through food, air and water results into the accumulation of heavy metal in several tissues which manifest several metabolic or hormonal disorders. Till now the effect of arsenic trioxide on protein misfolding and aggregation culminating into several neurodegenerative disorders is poorly understood. In the present study, we reveal the aggregation process of Hen Egg White Lysozyme (HEWL) in presence of arsenic trioxide (As2O3) at physiological conditions...
November 16, 2017: International Journal of Biological Macromolecules
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