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Katharine D Wenstrom, Mary E D'Alton, Daniel F O'Keefe
OBJECTIVE:  To conduct a survey of the members of the Society for Maternal-Fetal Medicine (SMFM) to determine the practice patterns of maternal-fetal medicine (MFM) subspecialists in the United States and to estimate the likelihood that our work force is sufficient to support the proposed MFM staffing requirements for level III and IV maternity centers. STUDY DESIGN:  All regular SMFM members in the United States were invited to answer a 26 question survey by email...
March 16, 2018: American Journal of Perinatology
Davis C Woodworth, Langston T Holly, Emeran A Mayer, Noriko Salamon, Benjamin M Ellingson
BACKGROUND: Advanced cervical spondylosis (CS) can cause structural damage to the spinal cord resulting in long-term neurological impairment including neck pain and motor weakness. We hypothesized long-term structural reorganization within the brain in patients with CS. OBJECTIVE: To explore the associations between cortical thickness, subcortical volumes, neurological symptoms, and pain severity in CS patients with or without myelopathy and healthy controls (HCs)...
March 14, 2018: Neurosurgery
Oren Schwartz, Itzik Malka, Cara H Olsen, Israel Dudkiewicz, Tarif Bader
Introduction: Integration of females in combat units poses a unique challenge for army commanders around the world. The purpose of this study is to provide a detailed up-to-date situation report regarding overuse injuries among combat female warriors in the IDF (Israeli Defense Forces) in order to enable evidence-based decision-making, prevention policy, and further research of this highly significant military public health issue. Methods: A cross-sectional descriptive study was conducted including 2,519 females recruited to combat duties during the year of 2013...
March 14, 2018: Military Medicine
Alexander D Jobrack, Suman Goel, Alvin M Cotlar
Introduction: Granular cell tumors (GCTs) are of neuroectodermal origin and account for 0.5% of soft tissue tumors. They are most prevalent in African-Americans in the fourth to sixth decades, with a predilection for the head and neck regions. GCTs usually resemble more common lesions and hence are difficult to diagnose preoperatively. The tumor is readily identified on needle biopsy. Although usually benign with a malignancy rate of only 2-3%, the malignant form has a reported 3-yr mortality of 60%...
March 14, 2018: Military Medicine
Devin Ancona, Dan York, Robert J Higgins, Danika Bannasch, Peter J Dickinson
Choroid plexus tumors (CPTs) occur spontaneously in humans and dogs providing an opportunity for comparative cross species analysis of common tumor mechanisms. Large scale chromosomal copy number alterations are the hallmark of human CPTs and identification of driver genes within these regions is problematic. Copy number alterations in 12 spontaneous dog CPTs were defined using an Illumina 170 K single nucleotide polymorphism array and were characterized by highly recurrent whole chromosomal losses in up to 100% of cases with few chromosome wide gains...
March 14, 2018: Journal of Neuropathology and Experimental Neurology
Vassilis E Papadopoulos, Georgia Nikolopoulou, Ivi Antoniadou, Antonia Karachaliou, Giovanna Arianoglou, Evangelia Emmanouilidou, S Pablo Sardi, Leonidas Stefanis, Kostas Vekrellis
Glucocerebrosidase gene (GBA) mutations are the most common genetic contributor to Parkinson's Disease (PD) and are associated with decreased Glucocerebrosidase (GCase) enzymatic activity in PD. PD patients without GBA mutations also exhibit lower levels of GCase activity in the central nervous system (CNS) suggesting a potential contribution of the enzyme activity in disease pathogenesis, possibly by alteration of lysosomal function. α-synuclein, a protein with a central role in PD pathogenesis, has been shown to be secreted partly in association with exosomes...
March 14, 2018: Human Molecular Genetics
P D Tar, N A Thacker, M Babur, Y Watson, S Cheung, R A Little, R G Gieling, K J Williams, J P B O'Connor
Motivation: Imaging demonstrates that preclinical and human tumors are heterogeneous, i.e. a single tumor can exhibit multiple regions that behave differently during both normal development and also in response to treatment. The large variations observed in control group tumors can obscure detection of significant therapeutic effects due to the ambiguity in attributing causes of change. This can hinder development of effective therapies due to limitations in experimental design, rather than due to therapeutic failure...
March 14, 2018: Bioinformatics
Christos Dimitrakopoulos, Sravanth Kumar Hindupur, Luca Häfliger, Jonas Behr, Hesam Montazeri, Michael N Hall, Niko Beerenwinkel
Motivation: Several molecular events are known to be cancer-related, including genomic aberrations, hypermethylation of gene promoter regions, and differential expression of microRNAs. These aberration events are very heterogeneous across tumors and it is poorly understood how they affect the molecular makeup of the cell, including the transcriptome and proteome. Protein interaction networks can help decode the functional relationship between aberration events and changes in gene and protein expression...
March 14, 2018: Bioinformatics
Marine Landa, Stéphane Blain, Jérôme Harmand, Sébastien Monchy, Alain Rapaport, Ingrid Obernosterer
In the Southern Ocean, natural iron fertilization in the wake of islands leads to annually occurring spring phytoplankton blooms associated with enhanced heterotrophic activity through the release of labile dissolved organic matter (DOM). The aim of this study was to investigate experimentally how diatom-derived DOM affects the composition of Southern Ocean winter water bacterial communities and to identify the most responsive taxa. A bacterial community collected in the naturally iron-fertilized region off Kerguelen Island (KEOPS2 October-November 2011) was grown onboard in continuous cultures, on winter water alone or amended with diatom-derived DOM supplied at identical DOC concentrations...
March 14, 2018: FEMS Microbiology Ecology
Igor S Pessi, Yannick Lara, Benoit Durieu, Pedro de C Maalouf, Elie Verleyen, Annick Wilmotte
The terrestrial Antarctic Realm has recently been divided into 16 Antarctic Conservation Biogeographic Regions (ACBRs) based on environmental properties and the distribution of biota. Despite their prominent role in the primary production and nutrient cycling in Antarctic lakes, cyanobacteria were only poorly represented in the biological dataset used to delineate these ACBRs. Here we provide a first high-throughput sequencing (HTS) insight into the spatial distribution of benthic cyanobacterial communities in Antarctic lakes located in four distinct, geographically distant ACBRs and covering a range of limnological conditions...
March 14, 2018: FEMS Microbiology Ecology
Oren Schwartz, Boris Kanevsky, M A J Sergey Kutikov, Cara H Olsen, Israel Dudkiewicz
Introduction: Attrition from training is associated with substantial financial and personnel loss. There is a plethora of medical literature and research of attrition rates related to initial/phase 1 training (basic combat training); however, the analysis of second phase training (commanders training, consisting of schools that qualify junior commanders and officers for infantry and non-infantry combat units) is limited. The purpose of this study is to perform a comprehensive survey regarding to medical attrition from commanders training in the IDF (Israeli Defense Forces) in order to present the commanders of the IDF a detailed situation report that will serve as an evidence-based platform for future policy planning and implementation...
March 14, 2018: Military Medicine
Deepak Reddy Gade, Amareswararao Makkapati, Rajesh Babu Yarlagadda, Godefridus J Peters, B S Sastry, V V S Rajendra Prasad
Overexpression of P-glycoprotein (P-gp) leads to the emergence of multidrug resistance (MDR) in cancer treatment. Acridones have the potential to reverse MDR and sensitize cells. In the present study, we aimed to elucidate the chemosensitization potential of acridones by employing various molecular modelling techniques. Pharmacophore modeling was performed for the dataset of chemosensitizing acridones earlier proved for cytotoxic activity against MCF7 breast cancer cell line. Gaussian-based QSAR studies also performed to predict the favored and disfavored region of the acridone molecules...
February 24, 2018: Computational Biology and Chemistry
Xuan Shi, Huu Hao Ngo, Langtao Sang, Pengkang Jin, Xiaochang C Wang, Guanghua Wang
In this study, a pilot combined sewer system was constructed to characterize the pollutant transformation in sewer sediment. The results showed that particulate contaminants deposited from sewage could be transformed into dissolved matter by distinct pollutant transformation pathways. Although the oxidation-reduction potential (ORP) was varied from -80 mV to -340 mV in different region of the sediment, the fermentation was the dominant process in all regions of the sediment, which induced hydrolysis and decomposition of particulate contaminants...
March 13, 2018: Environmental Pollution
Sijie Ge, Sujing Wang, Qiang Xu, Thomas Ho
Emergency shutdowns of chemical plants (ESCP) inevitably generate intensive and huge amounts of VOCs and NOx emissions through flaring that can cause highly localized and transient air pollution events with elevated ozone concentrations. However, quantitative studies of regional ozone impact due to ESCP, in terms of how ESCP would affect and to what extent ESCP could impact, are still lacking. This paper reports a systematic study on regional air quality impact from an olefin plant emergency shutdown due to the sudden failure of its cracked gas compressor (CGC)...
March 7, 2018: Chemosphere
A Garbout, M Férid
Considering the features in changing the structure and properties of rare earth titanates pyrochlores, the substituted Dy2 Ti2 O7 may be very attractive for various applications. Effect of Sm and Y substitution on the structural properties of Dy2 Ti2 O7 ceramic was established. These ceramics were prepared by solid-state reaction and characterized by X-ray diffraction and Raman spectroscopy. Both analysis show that YDyTi2 O7 with the pyrochlore structure is obtained after heating at 1400°C, but SmDyTi2 O7 has already formed after sintering at 1200°C...
March 10, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
Gillian A Ryan, Sarah M Nicholson, John J Morrison
Vaginal birth after caesarean (VBAC) delivery remains a controversial topic, and one for which there is a lack of robust data to guide clinicians and parturients regarding their best option for mode of delivery in a subsequent pregnancy. In many developed countries the trend observed in recent years is that of progressively reduced VBAC rates, and hence increased use of elective repeat caesarean section (ERCS). This factor has contributed, more than any other, to the disproportionately high caesarean section (CS) rates in many countries...
March 7, 2018: European Journal of Obstetrics, Gynecology, and Reproductive Biology
Chen Zhu, Xiaohui Zhang, Qiran Zhao, Qihui Chen
In genetics, heterosis refers to the phenomenon that cross-breeding within species leads to offspring that are genetically fitter than their parents and exhibit improved phenotypic characteristics. Based on the theory of heterosis and existing genetic evidence, offspring of "hybrid" marriages (spouses originating from different states/provinces/countries/areas), though relatively rare due to physical boundaries, may exhibit greater genetic fitness in terms of intelligence, height, or physical attractiveness (the "distance-performance" hypothesis)...
February 19, 2018: Economics and Human Biology
Corina Nüesch, Jan-Arie Overberg, Hermann Schwameder, Geert Pagenstert, Annegret Mündermann
BACKGROUND: Instrumented treadmills with integrated pressure mats measure spatiotemporal, pressure and force parameters and are often used to investigate changes in gait patterns due to injury or rehabilitation. RESEARCH QUESTION: What is the within- and between-day repeatability of such an instrumented treadmill for spatiotemporal parameters, peak pressures and forces during walking and running? METHODS: Treadmill gait and running analysis were performed at 5...
March 7, 2018: Gait & Posture
X Bai, B Tie, J-H Schmitt, D Aubry
The correlation between ultrasonic wave propagation and polycrystalline microstructures has significant implications in nondestructive evaluation. An original numerical approach using the finite element method to quantify in both time and frequency domains the ultrasonic noise scattering due to the elastic heterogeneity of polycrystalline microstructures is presented. Based on the reciprocity theorem, it allows the scattering evaluation using mechanical data recorded only on the boundary of polycrystal instead of within its volume and is applicable to any polycrystalline aggregate regardless of its crystallographic or morphological characteristics...
February 14, 2018: Ultrasonics
Richard Teke Ngomba, Gilles van Luijtelaar
Metabotropic glutamate (mGlu) receptors are expressed in key regions of the cortex and the thalamus and are known to regulate spike and wave discharges (SWDs), the electroclinical hallmarks of absence seizures. Recent preclinical studies have highlighted the therapeutic potential of selective group I and III mGlu receptor subtype allosteric modulators, which can suppress pathological SWDs. Of particular interest are positive allosteric modulators (PAMs) for mGlu5 receptors, as they currently show the most promise as novel anti-absence epilepsy drugs...
March 13, 2018: Current Opinion in Pharmacology
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