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Rekha Seshadri, Sinead C Leahy, Graeme T Attwood, Koon Hoong Teh, Suzanne C Lambie, Adrian L Cookson, Emiley A Eloe-Fadrosh, Georgios A Pavlopoulos, Michalis Hadjithomas, Neha J Varghese, David Paez-Espino, Rechelle Perry, Gemma Henderson, Christopher J Creevey, Nicolas Terrapon, Pascal Lapebie, Elodie Drula, Vincent Lombard, Edward Rubin, Nikos C Kyrpides, Bernard Henrissat, Tanja Woyke, Natalia N Ivanova, William J Kelly
Productivity of ruminant livestock depends on the rumen microbiota, which ferment indigestible plant polysaccharides into nutrients used for growth. Understanding the functions carried out by the rumen microbiota is important for reducing greenhouse gas production by ruminants and for developing biofuels from lignocellulose. We present 410 cultured bacteria and archaea, together with their reference genomes, representing every cultivated rumen-associated archaeal and bacterial family. We evaluate polysaccharide degradation, short-chain fatty acid production and methanogenesis pathways, and assign specific taxa to functions...
March 19, 2018: Nature Biotechnology
Ryan Rosenberry, Susie Chung, Michael D Nelson
Exercise represents a major hemodynamic stress that demands a highly coordinated neurovascular response in order to match oxygen delivery to metabolic demand. Reactive hyperemia (in response to a brief period of tissue ischemia) is an independent predictor of cardiovascular events and provides important insight into vascular health and vasodilatory capacity. Skeletal muscle oxidative capacity is equally important in health and disease, as it determines the energy supply for myocellular processes. Here, we describe a simple, non-invasive approach using near-infrared spectroscopy to assess each of these major clinical endpoints (reactive hyperemia, neurovascular coupling, and muscle oxidative capacity) during a single clinic or laboratory visit...
February 20, 2018: Journal of Visualized Experiments: JoVE
Ryan J Mailloux, Adrian Young, Marisa O'Brien, Robert Morris Gill
It has been reported that mitochondria can contain up to 12 enzymatic sources of reactive oxygen species (ROS). A majority of these sites include flavin-dependent respiratory complexes and dehydrogenases that produce a mixture of superoxide (O2●- ) and hydrogen peroxide (H2O2). Accurate quantification of the ROS-producing potential of individual sites in isolated mitochondria can be challenging due to the presence of antioxidant defense systems and side reactions that also form O2●- /H2O2. Use of nonspecific inhibitors that can disrupt mitochondrial bioenergetics can also compromise measurements by altering ROS release from other sites of production...
February 24, 2018: Journal of Visualized Experiments: JoVE
Karl Philipp Kutzner, Joachim Pfeil
Bone- and soft-tissue sparing short stems are increasingly used in total hip arthroplasty (THA). However, there are a large variety of models of short stems, differing in design and function. Calcar-guided short stems provide an anatomical curvature in the medial calcar region, thus, positioning is done individually alongside the calcar in the "round-the-corner" technique. Depending on the level of the neck's osteotomy, stems can be aligned individually in a large bandwidth of varus- and valgus anatomies...
February 27, 2018: Journal of Visualized Experiments: JoVE
Andrew K Fuller, Benjamin D Bice, Ashlee R Venancio, Olivia M Crowley, Ambur M Staab, Stephanie J Georges, Julio R Hidalgo, Annika V Warncke, Melinda L Angus-Hill
Several recent studies have illustrated the beneficial effects of living in an enriched environment on improving human disease. In mice, environmental enrichment (EE) reduces tumorigenesis by activating the mouse immune system, or affects tumor bearing animal survival by stimulating the wound repair response, including improved microbiome diversity, in the tumor microenvironment. Provided here is a detailed procedure to assess the effects of environmental enrichment on the biodiversity of the microbiome in a mouse colon tumor model...
February 28, 2018: Journal of Visualized Experiments: JoVE
Lisa N Chesner, Colin Campbell
The purpose of this method is to provide a flexible, rapid, and quantitative technique to examine the kinetics of DNA-protein crosslink (DPC) repair in mammalian cell lines. Rather than globally assaying removal of xenobiotic-induced or spontaneous chromosomal DPC removal, this assay examines the repair of a homogeneous, chemically defined lesion specifically introduced at one site within a plasmid DNA substrate. Importantly, this approach avoids the use of radioactive materials and is not dependent on expensive or highly-specialized technology...
March 5, 2018: Journal of Visualized Experiments: JoVE
Madeleine S Durkee, Landon D Nash, Fatemeh Nooshabadi, Jeffrey D Cirillo, Duncan J Maitland, Kristen C Maitland
The rapid development of new optical imaging techniques is dependent on the availability of low-cost, customizable, and easily reproducible standards. By replicating the imaging environment, costly animal experiments to validate a technique may be circumvented. Predicting and optimizing the performance of in vivo and ex vivo imaging techniques requires testing on samples that are optically similar to tissues of interest. Tissue-mimicking optical phantoms provide a standard for evaluation, characterization, or calibration of an optical system...
February 12, 2018: Journal of Visualized Experiments: JoVE
Polina Zjablovskaja, Petr Danek, Miroslava Kardosova, Meritxell Alberich-Jorda
Understanding of the hematopoietic stem and progenitor cell biology has important implications for regenerative medicine and the treatment of hematological pathologies. Despite the most relevant data that can be acquired using in vivo models or primary cultures, the low abundance of hematopoietic stem and progenitor cells considerably restricts the pool of suitable techniques for their investigation. Therefore, the use of cell lines allows sufficient production of biological material for the performance of screenings or assays that require large cell numbers...
February 21, 2018: Journal of Visualized Experiments: JoVE
Chao Xiong, Zhiquan Zhang, Gurpreet S Baht, Niccolo Terrando
Surgery is commonly used to improve and maintain quality of life. Unfortunately, in vulnerable patients such as the elderly, complications may occur and significantly diminish the outcome. Indeed, after routine orthopedic surgery to repair a fracture, as many as 50% of elderly patients suffer from neurologic complications like delirium. Also, the capacity to heal and regenerate tissue after surgery decreases with age, and can impact the quality of fracture repair and even osseous integration of implants. Thus, a better understanding of mechanisms that drive these age-dependent changes could provide strategic targets to minimize risk for such complications and optimize outcomes...
February 27, 2018: Journal of Visualized Experiments: JoVE
Andrey Zavadsky, Lev Shemer
This manuscript describes an experimental procedure that allows obtaining diverse quantitative information on temporal and spatial evolution of water waves excited by time-dependent and steady wind forcing. Capacitance-type wave gauge and Laser Slope Gauge (LSG) are used to measure instantaneous water surface elevation and two components of the instantaneous surface slope at a number of locations along the test section of a wind-wave facility. The computer-controlled blower provides airflow over the water in the tank whose rate can vary in time...
February 13, 2018: Journal of Visualized Experiments: JoVE
Satoshi Nishijima, Yoichi Otsuka, Hiroshi Ohoyama, Kentaro Kajimoto, Kento Araki, Takuya Matsumoto
Nonlinear current-voltage (<i>I-V</i>) characteristics is an important property for the realization of information processing in molecular electronics. We studied the electrical conduction through a Ru-dye complex (N-719) on a 2-aminoethanethiol (2-AET) monolayer in a nanoparticle bridge junction system. The nonlinear <i>I-V</i> characteristics exhibited a threshold voltage at around 1.2 V and little temperature dependence. From the calculation of the molecular states using density functional theory and the energy alignment between the electrodes and molecules, the conduction mechanism in this system was considered to be resonant tunneling via the HOMO level of N-719...
March 19, 2018: Nanotechnology
Tiziana Leone, Diego Alburez-Gutierrez, Rula Gandour, Ernestina Coast, Rita Giacaman
BACKGROUND: Armed conflicts can undermine a country's health-care capacity and disrupt the delivery of basic health services. Yet the public health consequences of war remain difficult to quantify, mainly because adequate data do not exist. We hypothesised that the ongoing conflict in the occupied Palestinian territory (including the restrictions on free movement and the strain on health-care services) have had detrimental effects on maternal and child health outcomes. METHODS: We reconstructed data on delivery by caesarean section and diphtheria, pertussis, and tetanus vaccination with pooled data from Demographic and Health Surveys for 2000-14...
February 21, 2018: Lancet
Suha Al-Butmeh, Njah Al-Khataib
BACKGROUND: The focus of this study was quality of life and mental health in elderly people living in the Bethlehem district. The aim of this study was to identify the most prevalent mental health problems and how they affect quality of life. METHODS: This cross-sectional study was done in June and July, 2010. We recruited a convenience sample of elderly people (aged 65 years and older) living in the Bethlehem district of occupied Palestinian territory. Using a structured questionnaire, we assessed quality of life with the WHOQOL-BREF and current psychological status and distress with the Brief Symptom Inventor...
February 21, 2018: Lancet
Ron J Smith
BACKGROUND: Siege, a process of political domination aimed at isolating an entire population, is a unique threat to health-care provision. The aim of this study was to qualitatively examine the effects of the Israeli siege on the practices and systems that underlie health in the Gaza Strip. METHODS: Data were from participant observation between 2009 and 2017, including 20 interviews with doctors and health administrators in non-governmental organisations (NGO), government, and UN sectors...
February 21, 2018: Lancet
Mohammed B Sarhan, Rula Ghandour, Niveen M E Abu Rmeileh
BACKGROUND: The burden of type 2 diabetes is increasing rapidly in the occupied Palestinian territory. Different counselling interventions have been applied worldwide to reduce HbA1c concentrations in patients with type 2 diabetes. Achieving good glycaemic control is important for prevention of complications of type 2 diabetes. The aim of this modelling study was to assess the effectiveness of different counselling interventions in improving glycaemic control in patients with type 2 diabetes...
February 21, 2018: Lancet
Khaled Abu Saman, Salwa Massad, Ali Abu Ibaid, Huda Anan, Mamhoud Daher, Rand Salman, Saleh Aldeqes
BACKGROUND: About 9% of the world's population has diabetes. Most people with diabetes live in developing countries. Diabetes is the fourth leading cause of death in the occupied Palestinian territory. The likelihood of diabetes complications increases with depression. Worldwide, about half of patients with diabetes have severe depression that has been misidentified by health providers. The aim of this study was to examine factors associated with depression in patients with type 2 diabetes in the Gaza governorate...
February 21, 2018: Lancet
Michelle E Maxson, Xenia Naj, Teresa R O'Meara, Jonathan D Plumb, Leah E Cowen, Sergio Grinstein
Candida albicans hyphae can reach enormous lengths, precluding their internalization by phagocytes. Nevertheless, macrophages engulf a portion of the hypha, generating incompletely sealed tubular phagosomes. These frustrated phagosomes are stabilized by a thick cuff of F-actin that polymerizes in response to non-canonical activation of integrins by fungal glycan. Despite their continuity, the surface and invaginating phagosomal membranes retain a strikingly distinct lipid composition. PtdIns(4,5)P2 is present at the plasmalemma but is not detectable in the phagosomal membrane, while PtdIns(3)P and PtdIns(3,4,5)P3 co-exist in the phagosomes yet are absent from the surface membrane...
March 19, 2018: ELife
Jennifer F Buckman, Evgeny G Vaschillo, Maria Fonoberova, Igor Mezić, Marsha E Bates
OBJECTIVE: It has been nearly 15 years since Kazdin and Nock published methodological and research recommendations for understanding mechanisms of change in child and adolescent therapy. Their arguments and enthusiasm for research on mechanisms of behavior change (MOBCs) resonated across disciplines and disorders, as it shined a light on the crucial importance of understanding how and for whom treatments instigate behavior change and how therapeutic mechanisms might be extended to "situations and settings of everyday life...
March 2018: Journal of Studies on Alcohol and Drugs
Emily T Noyes, Jacob A Levine, Robert C Schlauch, Cory A Crane, Gerard J Connors, Stephen A Maisto, Ronda L Dearing
OBJECTIVE: With the growing recognition that, for some, significant changes in drinking occur before the first treatment session (i.e., pretreatment change), researchers have called for the careful assessment of when change occurs and its potential impact on mechanism of behavior change (MOBC) research. Using a commonly hypothesized MOBC variable, alcohol abstinence self-efficacy, the primary aim of this study was to examine the effect of pretreatment change on the study of MOBCs. METHOD: Sixty-three individuals diagnosed with alcohol dependence were recruited to participate in a 12-week cognitive-behavioral treatment...
March 2018: Journal of Studies on Alcohol and Drugs
Jon M Houck, Jennifer K Manuel, Theresa B Moyers
OBJECTIVE: There is evidence of a causal chain in motivational interviewing (MI) involving counselor MI-consistent skills, client change language, and outcomes. MI was a key component of the combined behavioral intervention in the Combined Pharmacotherapies and Behavioral Interventions for Alcohol Dependence (COMBINE) Study. Participants in COMBINE were treatment-seeking and medication-seeking, and were required to maintain a period of abstinence before enrollment. Counselors were closely monitored and were temporarily removed from the study for remediation and supervision if their performance fell below threshold...
March 2018: Journal of Studies on Alcohol and Drugs
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