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https://www.readbyqxmd.com/read/28432866/shared-genetic-influences-among-childhood-shyness-social-competences-and-cortical-responses-to-emotions
#1
Marco Battaglia, Giorgia Michelini, Elettra Pezzica, Anna Ogliari, Corrado Fagnani, Maria-Antonietta Stazi, Eleonora Bertoletti, Simona Scaini
Visual event-related potentials (ERPs) evoked by facial expressions are useful to map socioemotional responses among shy children and to predict transition into social phobia. We investigated the sources of covariation among childhood shyness, social competences, and ERPs to other children's happy, neutral, and angry expressions. Electrophysiological and twin analyses examined the phenotypic and etiological association among an index of childhood shyness, an index of social competences, and ERP responses to facial expressions in 200 twins (mean age=9...
April 19, 2017: Journal of Experimental Child Psychology
https://www.readbyqxmd.com/read/28431796/lessons-learned-from-twins-in-autoimmune-and-chronic-inflammatory-diseases
#2
REVIEW
Elena Generali, Angela Ceribelli, Maria Antonietta Stazi, Carlo Selmi
Autoimmunity and chronic inflammation recognize numerous shared factors and, as a result, the resulting diseases frequently coexist in the same patients or respond to the same treatments. Among the convenient truths of autoimmune and chronic inflammatory diseases, there is now agreement that these are complex conditions in which the individual genetic predisposition provides a rate of heritability. The concordance rates in monozygotic and dizygotic twins allows to estimate the weight of the environment in determining disease susceptibility, despite recent data supporting that only a minority of immune markers depend on hereditary factors...
April 18, 2017: Journal of Autoimmunity
https://www.readbyqxmd.com/read/28431171/heritability-of-heart-rate-response-to-arousals-in-twins
#3
Xiaoling Gao, Ali Azarbarzin, Brendan T Keenan, Michele Ostrowski, Frances M Pack, Bethany Staley, Greg Maislin, Allan I Pack, Magdy Younes, Samuel T Kuna
Objectives: To determine if the large and highly reproducible inter-individual differences in arousal intensity and heart rate response to arousal (ΔHR) during non-REM sleep are heritable. Methods: Polysomnograms of 55 monozygotic (14 male and 41 female pairs) and 36 dizygotic (15 male and 21 female pairs) same-sex twin pairs were analyzed. Arousals were scored using the 2012 American Academy of Sleep Medicine criteria. Arousal intensity was scaled (between 0 and 9) using an automatic algorithm based on the change in EEG time and frequency characteristics...
April 18, 2017: Sleep
https://www.readbyqxmd.com/read/28430324/negative-staining-of-the-vitreous-with-the-use-of-vital-dyes
#4
Cesare Mariotti, Michele Nicolai, Simone Donati, Michele Reibaldi
PURPOSE: The vitreous cortex, epiretinal membrane (ERM), and inner limiting membrane (ILM) are transparent tissues and are thus difficult to visualize. Staining these structures can increase the efficiency of a nontraumatic removal. METHODS: The surgeon performs a partial core vitrectomy and induces a posterior vitreous detachment. The vital dye is then injected into the retrohyaloid space in balanced salt solution (BSS). The dyes used are TWIN (Alchimia srl, Padova, Italy), MembraneBlue-Dual (DORC International, Zuidland, the Netherlands), and Doubledyne (Alfa Intes, Casoria, Italy)...
April 13, 2017: European Journal of Ophthalmology
https://www.readbyqxmd.com/read/28430088/informatics-for-health-2017-advancing-both-science-and-practice
#5
Philip J Scott, Ronald Cornet, Colin McCowan, Niels Peek, Paolo Fraccaro, Nophar Geifman, Wouter T Gude, William Hulme, Glen P Martin, Richard Williams
INTRODUCTION: The Informatics for Health congress, 24-26 April 2017, in Manchester, UK, brought together the Medical Informatics Europe (MIE) conference and the Farr Institute International Conference. This special issue of the Journal of Innovation in Health Informatics contains 113 presentation abstracts and 149 poster abstracts from the congress. DISCUSSION: The twin programmes of "Big Data" and "Digital Health" are not always joined up by coherent policy and investment priorities...
April 21, 2017: Journal of Innovation in Health Informatics
https://www.readbyqxmd.com/read/28429759/dual-mechanisms-of-grain-refinement-in-a-fecocrni-high-entropy-alloy-processed-by-high-pressure-torsion
#6
Wenqian Wu, Min Song, Song Ni, Jingshi Wang, Yong Liu, Bin Liu, Xiaozhou Liao
An equiatomic FeCoCrNi high-entropy alloy with a face-centered cubic structure was fabricated by a powder metallurgy route, and then processed by high-pressure torsion. Detailed microscopy investigations revealed that grain refinement from coarse grains to nanocrystalline grains occurred mainly via concurrent nanoband (NB) subdivision and deformation twinning. NB-NB, twin-NB and twin-twin interactions contributed to the deformation process. The twin-twin interactions resulted in severe lattice distortion and accumulation of high densities of dislocations in the interaction areas...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28429683/biokinetics-of-yttrium-and-comparison-with-its-geochemical-twin-holmium
#7
Richard Wayne Leggett
The transition metal yttrium (Y, atomic number 39) is chemically similar to elements in the lanthanide family (atomic numbers 57-71) and is found with the lanthanides in rare earth ores. Yttrium and the lanthanide holmium are referred to as geochemical twins because they generally show little fractionation from metamorphic or weathering processes, due to their closely similar chemical properties and nearly identical ionic radii. Extensive measurements on rocks, soils, and meteorites indicate that the Y/Ho mass concentration ratio rarely falls far from the so-called chondritic or solar system ratio of ~26...
April 21, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/28429501/formation-of-macromolecules-in-wheat-gluten-starch-mixtures-during-twin-screw-extrusion-effect-of-different-additives
#8
Kaiqiang Wang, Cheng Li, Bingzhi Wang, Wen Yang, Shuizhong Luo, Yanyan Zhao, Shaotong Jiang, Dongdong Mu, Zhi Zheng
BACKGROUND: Wheat gluten comprises a good quality and inexpensive vegetable protein with an ideal amino acid composition. To expand the potential application of wheat gluten in the food industry, the effect of different additives on the physicochemical and structural properties of wheat gluten/starch mixtures during twin-screw extrusion was investigated. RESULTS: Macromolecules were observed to form in wheat gluten/starch mixtures during twin-screw extrusion, which may be ascribed to the formation of new disulfide bonds and non-covalent interactions, as well as Maillard reaction products...
April 21, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28427946/is-an-early-age-at-illness-onset-in-schizophrenia-associated-with-increased-genetic-susceptibility-analysis-of-data-from-the-nationwide-danish-twin-register
#9
Rikke Hilker, Dorte Helenius, Birgitte Fagerlund, Axel Skytthe, Kaare Christensen, Thomas M Werge, Merete Nordentoft, Birte Glenthøj
BACKGROUND: Early age at illness onset has been viewed as an important liability marker for schizophrenia, which may be associated with an increased genetic vulnerability. A twin approach can be valuable, because it allows for the investigation of specific illness markers in individuals with a shared genetic background. METHODS: We linked nationwide registers to identify a cohort of twin pairs born in Denmark from 1951 to 2000 (N=31,524 pairs), where one or both twins had a diagnosis in the schizophrenia spectrum...
April 6, 2017: EBioMedicine
https://www.readbyqxmd.com/read/28426696/heritability-of-brain-volume-on-mri-in-middle-to-advanced-age-a-twin-study-of-japanese-adults
#10
Matthew W Lukies, Yoshiyuki Watanabe, Hisashi Tanaka, Hiroto Takahashi, Soshiro Ogata, Kayoko Omura, Shiro Yorifuji, Noriyuki Tomiyama
Brain atrophy is part of the aging process and accelerated by neurodegenerative diseases, so an understanding of the background heritability of brain volume is essential. The purpose of this study was to determine the heritability of brain volume in middle to advanced age East Asian adults, an age group less studied and an ethnicity not previously studied. 3T magnetic resonance images were obtained and volumetric analyses conducted for a total of 74 individuals, 20 monozygotic twin pairs (mean age 61y min 41y max 75y) and 17 dizygotic twin pairs (mean age 64y min 41y max 85y)...
2017: PloS One
https://www.readbyqxmd.com/read/28425672/evaluating-therapeutic-effect-on-womac-subscales-in-osteoarthritis-rcts-when-model-choice-matters
#11
Giulia Lorenzoni, Danila Azzolina, Nicola Soriani, Dario Gregori
RATIONALE, AIMS, AND OBJECTIVES: The study aimed at developing a method for modelling the Western Ontario and McMaster Universities index (WOMAC), accounting for correlation between its subscales and for heterogeneity of treatment effect (HTE), using data from 2 twin trials on knee osteoarthritis. METHOD: Two randomized, double-blind, placebo-controlled clinical trials (twin trials). Studies aimed at investigating the effectiveness of a pharmacological treatment on clinical outcomes of knee osteoarthritis, measured using WOMAC index...
April 20, 2017: Journal of Evaluation in Clinical Practice
https://www.readbyqxmd.com/read/28425218/recurrence-of-congenital-heart-defects-among-siblings-a-nationwide-study
#12
Kristoffer Brodwall, Gottfried Greve, Elisabeth Leirgul, Grethe S Tell, Stein E Vollset, Nina Øyen
Congenital heart defects (CHD) constitute the largest group of congenital malformations. In most families, only one person has CHD; however, the risk of CHD increases for children born into families already affected. In this study, all births from 1994 through 2009 were identified in the Medical Birth Registry of Norway, including supplemental information on CHD from clinical and administrative registers, as part of the CVDNOR project. By using the unique personal identification number of each parent we were able to link 16,078 pairs of twins, 445,584 pairs of full siblings, and 106,840 pairs of half-siblings...
April 19, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28424107/early-maturation-and-substance-use-across-adolescence-and-young-adulthood-a-longitudinal-study-of-finnish-twins
#13
Jeanne E Savage, Richard J Rose, Lea Pulkkinen, Karri Silventoinen, Tellervo Korhonen, Jaakko Kaprio, Nathan Gillespie, Danielle M Dick
Early maturation, indexed by pubertal development (PD), has been associated with earlier initiation and greater frequency of adolescent substance use, but this relationship may be biased by confounding factors and effects that change across development. Using a population-based Finnish twin sample (N = 3,632 individuals), we conducted twin modeling and multilevel structural equation modeling of the relationship between PD and substance use at ages 12-22. Shared environmental factors contributed to early PD and heavier substance use for females...
April 20, 2017: Development and Psychopathology
https://www.readbyqxmd.com/read/28422692/safe-screening-rules-for-accelerating-twin-support-vector-machine-classification
#14
Xianli Pan, Zhiji Yang, Yitian Xu, Laisheng Wang
The twin support vector machine (TSVM) is widely used in classification problems, but it is not efficient enough for large-scale data sets. Furthermore, to get the optimal parameter, the exhaustive grid search method is applied to TSVM. It is very time-consuming, especially for multiparameter models. Although many techniques have been presented to solve these problems, all of them always affect the performance of TSVM to some extent. In this paper, we propose a safe screening rule (SSR) for linear-TSVM, and give a modified SSR (MSSR) for nonlinear TSVM, which contains multiple parameters...
April 12, 2017: IEEE Transactions on Neural Networks and Learning Systems
https://www.readbyqxmd.com/read/28422613/the-impact-of-prospective-telemedicine-implementation-in-the-management-of-childhood-acute-lymphoblastic-leukemia-in-recife-brazil
#15
Francisco Pedrosa, Faisal Shaikh, Gaston Rivera, Raul Ribeiro, Ibrahim Qaddoumi
BACKGROUND: A gap in childhood cancer outcomes remains between developed and developing countries. Persistence of this gap may be caused by financial, social, or educational disparities. Twinning and distance learning initiatives may improve such disparities. Integrating telemedicine into pediatric oncology twinning programs enhances education and facilitates patient-centered capacity building. MATERIALS AND METHODS: We performed an analysis of Web-based meetings held from August 2005 through July 2009 between the International Outreach Program at St...
April 19, 2017: Telemedicine Journal and E-health: the Official Journal of the American Telemedicine Association
https://www.readbyqxmd.com/read/28422403/blood-chimerism-in-dizygotic-monochorionic-twins-during-five-years-observation
#16
Morten Hanefeld Dziegiel, Morten Høgh Hansen, Sofie Haedersdal, Angela Natalie Barrett, Klaus Rieneck, Katharina Maria Main, Anne Todsen Hansen, Frederik Banch Clausen
Dizygotic monochorionic twin pregnancies can result in blood chimerism due to in utero twin-to-twin exchange of stem cells. In this case, we examined the proportion of allogeneic red blood cells (RBCs) by flow cytometry and the proportion of allogeneic nucleated cells by digital PCR at seven months and again at five years. We found an increase in the proportion of allogeneic cells from 63% to 89% in one twin, and a similar increase in autologous cells in the other twin from 57% to 84%. A paradigm for stem cell therapy could be modelled on this case: induction of tolerance and chimerism by antenatal transfusion of donor stem cells...
April 19, 2017: American Journal of Transplantation
https://www.readbyqxmd.com/read/28422345/therapeutic-efficacy-of-twin-block-and-fixed-oral-appliances-in-patients-with-obstructive-sleep-apnea-syndrome
#17
George Umemoto, Hideo Toyoshima, Yuji Yamaguchi, Naoko Aoyagi, Chikara Yoshimura, Kouta Funakoshi
PURPOSE: To compare the efficacy of twin-block (i.e., allows mouth opening) and fixed (i.e., maintains mouth closure) mandibular advancement splints (MASs) for the treatment of obstructive sleep apnea-hypopnea syndrome (OSA). MATERIALS AND METHODS: From 2011 to 2013, 23 patients with OSA in the twin-block group, and from 2013 to 2015, 29 patients in the fixed MAS group were included. All patients underwent polysomnography before and after 3 months of treatment. The two sets of polysomnographic and cephalometric variables were compared...
April 19, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28422179/heritability-maps-of-human-face-morphology-through-large-scale-automated-three-dimensional-phenotyping
#18
Dimosthenis Tsagkrasoulis, Pirro Hysi, Tim Spector, Giovanni Montana
The human face is a complex trait under strong genetic control, as evidenced by the striking visual similarity between twins. Nevertheless, heritability estimates of facial traits have often been surprisingly low or difficult to replicate. Furthermore, the construction of facial phenotypes that correspond to naturally perceived facial features remains largely a mystery. We present here a large-scale heritability study of face geometry that aims to address these issues. High-resolution, three-dimensional facial models have been acquired on a cohort of 952 twins recruited from the TwinsUK registry, and processed through a novel landmarking workflow, GESSA (Geodesic Ensemble Surface Sampling Algorithm)...
April 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28421666/genetic-interplay-between-human-longevity-and-metabolic-pathways-a-large-scale-eqtl-study
#19
Robert Häsler, Geetha Venkatesh, Qihua Tan, Friederike Flachsbart, Anupam Sinha, Philip Rosenstiel, Wolfgang Lieb, Stefan Schreiber, Kaare Christensen, Lene Christiansen, Almut Nebel
Human longevity is a complex phenotype influenced by genetic and environmental components. Unraveling the contribution of genetic vs. nongenetic factors to longevity is a challenging task. Here, we conducted a large-scale RNA-sequencing-based expression quantitative trait loci study (eQTL) with subsequent heritability analysis. The investigation was performed on blood samples from 244 individuals from Germany and Denmark, representing various age groups including long-lived subjects up to the age of 104 years...
April 19, 2017: Aging Cell
https://www.readbyqxmd.com/read/28421630/the-factor-structure-of-dental-fear
#20
Caroline M H H van Houtem, Arjen J van Wijk, Dorret I Boomsma, Lannie Ligthart, Corine M Visscher, Ad de Jongh
There is limited empirical information as to whether or how stimuli associated with dental fear can be classified into distinct subtypes. The purpose of the current study was to develop a descriptive framework for the classification of dental fear. Data were collected using a survey among Dutch twin families (n = 11,771). The sample was randomly divided into two subsamples of, respectively, 5,920 and 5,851 individuals. An exploratory factor analysis (EFA) was performed on the first subsample to delineate the multidimensional structure of a set of 28 dental-fear-provoking objects and situations...
April 18, 2017: European Journal of Oral Sciences
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