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https://www.readbyqxmd.com/read/29777239/inference-about-causation-between-body-mass-index-and-dna-methylation-in-blood-from-a-twin-family-study
#1
Shuai Li, Ee Ming Wong, Minh Bui, Tuong L Nguyen, Ji-Hoon Eric Joo, Jennifer Stone, Gillian S Dite, Pierre-Antoine Dugué, Roger L Milne, Graham G Giles, Richard Saffery, Melissa C Southey, John L Hopper
BACKGROUND: Several studies have reported DNA methylation in blood to be associated with body mass index (BMI), but few have investigated causal aspects of the association. We used a twin family design to assess this association at two life points and applied a novel analytical approach to appraise the evidence for causality. METHODS: The methylation profile of DNA from peripheral blood was measured for 479 Australian women from 130 twin families. Linear regression was used to estimate the associations of DNA methylation at ~410,000 cytosine-guanine dinucleotides (CpGs), and of the average DNA methylation at ~20,000 genes, with current BMI, BMI at age 18-21 years, and the change between the two (BMI change)...
May 17, 2018: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/29776614/characterisation-of-peripheral-blood-mononuclear-cell-populations-in-periparturient-dairy-cows-that-develop-metritis
#2
John J Bromfield, Meghan M Watt, Sossi M Iacovides
Bacterial contamination of the uterus following calving is ubiquitous in the dairy cow, 40% of cows develop postpartum uterine infection, including metritis. While predisposing factors like twinning and dystocia are associated with metritis, it is unclear why some cows remain healthy following calving and others develop uterine infection, negatively impacting animal health, milk production and economic return. Here, we profiled peripheral blood mononuclear cells of cows before calving and during postpartum metritis...
June 2018: Veterinary Immunology and Immunopathology
https://www.readbyqxmd.com/read/29776396/delivery-of-the-second-twin-influence-of-presentation-on-neonatal-outcome-a-case-controlled-study
#3
Gerhard Bogner, Valentina Wallner, Claudius Fazelnia, Martina Strobl, Birgit Volgger, Thorsten Fischer, Volker R Jacobs
BACKGROUND: Spontaneous vaginal twin delivery after 32nd week of gestation is safe when first twin presenting cephalic. Aim of this study is to identify obstetric factors influencing the condition of second twin and to verify whether non-cephalic presentation and vaginal breech delivery of the second twin is safe. METHODS: This is a retrospective case controlled cohort study of 717 uncomplicated twin deliveries ≥32 + 0 weeks of gestation from 2005 to 2014 in two tertiary perinatal centers...
May 18, 2018: BMC Pregnancy and Childbirth
https://www.readbyqxmd.com/read/29775871/associations-between-abuse-neglect-and-adhd-from-childhood-to-young-adulthood-a-prospective-nationally-representative-twin-study
#4
Adi Stern, Jessica Agnew-Blais, Andrea Danese, Helen L Fisher, Sara R Jaffee, Timothy Matthews, Guilherme V Polanczyk, Louise Arseneault
Child maltreatment has consistently been found to be associated with attention deficit/hyperactivity disorder (ADHD). However, the robustness of this association and the direction of the link between maltreatment and ADHD remain unclear. We used data from the Environmental Risk (E-Risk) Longitudinal Twin Study, a cohort of 2232 British twins, to investigate the associations between exposure to abuse/neglect and ADHD in childhood and in young adulthood, and to test their robustness and specificity. We also aimed to test longitudinal associations between abuse/neglect and ADHD from childhood to young adulthood, controlling for confounders...
May 15, 2018: Child Abuse & Neglect
https://www.readbyqxmd.com/read/29773819/a-comprehensive-study-on-microstructure-and-tensile-behaviour-of-a-selectively-laser-melted-stainless-steel
#5
Chunlei Qiu, Mohammed Al Kindi, Aiman Salim Aladawi, Issa Al Hatmi
316L stainless steel samples have been prepared by selective laser melting (SLM) using a pulsed laser mode and different laser powers and scanning patterns. The as-fabricated samples were found to be dominated by clusters of nano-sized γ needles or cells. TEM imaging shows that these needles contain a high population of dislocations while TEM-EDX analysis reveals high chemical homogeneity throughout the as-fabricated samples as evidenced by the fact that there is even no micro-/nano-segregation at interfaces between neighbouring γ needles...
May 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29772723/evolution-of-grain-interfaces-in-annealed-duplex-stainless-steel-after-parallel-cross-rolling-and-direct-rolling
#6
Ming Wang, Haoqing Li, Yujing Tian, Hong Guo, Xiaoying Fang, Yuebin Guo
Changes in various grain interfaces, including the grain boundary and phase boundary, are a strong indication of microstructural changes, particularly ultra-fined grains achieved by large strain deformation and subsequent annealing. After direct rolling and cross rolling with the same strain of ε = 2, the distributions of the interfaces in annealed UNS S32304 duplex stainless steel were investigated using electron backscatter diffraction (EBSD) in this study. The ferrite experienced continued recovery, and a high density of low-angle grain boundaries (LAGBs) was produced...
May 16, 2018: Materials
https://www.readbyqxmd.com/read/29772273/effect-of-formulation-and-process-variables-on-lipid-based-sustained-release-tablets-via-continuous-twin-screw-granulation-a-comparative-study
#7
Venkata Raman Kallakunta, Roshan Tiwari, Sandeep Sarabu, Suresh Bandari, Michael A Repka
The current study's aim is to prepare lipid based sustained release tablets via a twin-screw granulation technique and compare those dosage forms with conventional techniques, namely wet granulation and direct compression. The granules were successfully manufactured in a single-step, continuous twin-screw granulation process with a low proportion of binder (Klucel™ EF, HPC SSL) using Compritol® 888 ATO, Precirol® ATO 5 and Geleol™ as sustained release agents. The granules prepared showed good flow characteristics and compaction properties...
May 14, 2018: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29767413/the-statistical-joys-and-added-complications-of-twin-studies
#8
James A Hanley
No abstract text is available yet for this article.
May 16, 2018: Paediatric and Perinatal Epidemiology
https://www.readbyqxmd.com/read/29765759/crystal-structures-of-5-12-dimethyl-1-4-8-11-tetra-aza-cyclo-tetra-decane-cobalt-iii-mono-phenyl-acetyl-ide-and-bis-phenyl-acetyl-ide
#9
Benjamin M Oxley, Brandon Mash, Matthias Zeller, Susannah Banziger, Tong Ren
Reported in this contribution are the synthesis and crystal structures of new mono- and bis-phenyl-acetyl-ides based on CoIII (DMC) (DMC is 5,12-dimethyl-1,4,8,11-tetra-aza-cyclo-tetra-deca-ne). Chlorido-(5,12-dimethyl-1,4,8,11-tetra-aza-cyclo-tetra-deca-ne)(phenyl-ethyn-yl)cobalt(III) chloride-aceto-nitrile-methanol (1/1/1), [Co(C8 H5 )Cl(C12 H28 N4 )]Cl·CH3 CN·CH3 OH, 1 , and (5,12-dimethyl-1,4,8,11-tetra-aza-cyclo-tetra-deca-ne)bis-(phenyl-ethyn-yl)cobalt(III) tri-fluoro-methane-sulfonate-di-chloro-methane (2/1), [Co(C8 H5 )2 (C12 H28 N4 )]2 (CF3 SO3 )2 ·CH2 Cl2 , 2 , were prepared under weak-base conditions in satisfactory yields...
April 1, 2018: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/29764452/risk-factors-for-korean-women-to-develop-an-isthmocele-after-a-cesarean-section
#10
I Y Park, M R Kim, H N Lee, Y Gen, M J Kim
BACKGROUND: The increase in number of cesarean section (CS) operations has resulted in an increase in cases of isthmocele development. The objective of this study is to determine the risk factors for isthmocele development after CS. METHODS: Isthmocele measurements were taken for 404 women with a history of at least one low transverse CS. The following potential risk factors were investigated: patient's age at CS, cause of CS, weeks of gestation at CS, premature rupture of membrane (PROM), phase of labor, type suture (single/double layer), operation time, uterine flexion (anteversion/retroversion), and blood transfusion during operation...
May 15, 2018: BMC Pregnancy and Childbirth
https://www.readbyqxmd.com/read/29763608/early-prognostic-factors-of-outcomes-in-monochorionic-twin-pregnancy-systematic-review-and-meta-analysis
#11
REVIEW
Fiona L Mackie, Matthew J Hall, R Katie Morris, Mark D Kilby
OBJECTIVE: Assess ability of first trimester pregnancy related factors (ultrasound measurements, maternal characteristics, biomarkers) to predict complications in monochorionic twin pregnancies DATA SOURCES: MEDLINE, EMBASE, ISI Web of Science, CINAHL, the Cochrane Central Registration of Controlled Trials and Research Registers, and Google Scholar, from inception to 12 May 2017. Grey literature and bibliographies of articles were checked. STUDY ELIGIBILITY CRITERIA: Studies that reported ultrasound measurements, maternal characteristics, or potential biomarkers, measured in the first trimester in monochorionic diamniotic twin pregnancies, where the potential prognostic ability between the variable and twin-twin transfusion syndrome, growth restriction, or intrauterine fetal death could be assessed...
May 12, 2018: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/29761639/nongenetic-risk-factors-for-holoprosencephaly-an-updated-review-of-the-epidemiologic-literature
#12
April D Summers, Jennita Reefhuis, Joanna Taliano, Sonja A Rasmussen
Holoprosencephaly (HPE) is a major structural birth defect of the brain that occurs in approximately 1 in 10,000 live births. Although some genetic causes of HPE are known, a substantial proportion of cases have an unknown etiology. Due to the low birth prevalence and rarity of exposure to many potential risk factors for HPE, few epidemiologic studies have had sufficient sample size to examine risk factors. A 2010 review of the literature identified several risk factors that had been consistently identified as occurring more frequently among cases of HPE, including maternal diabetes, twinning, and a predominance of females, while also identifying a number of potential risk factors that had been less widely studied...
May 15, 2018: American Journal of Medical Genetics. Part C, Seminars in Medical Genetics
https://www.readbyqxmd.com/read/29760483/structure-and-crystallography-of-foliated-and-chalk-shell-microstructures-of-the-oyster-magallana-the-same-materials-grown-under-different-conditions
#13
Antonio G Checa, Elizabeth M Harper, Alicia González-Segura
Oyster shells are mainly composed of layers of foliated microstructure and lenses of chalk, a highly porous, apparently poorly organized and mechanically weak material. We performed a structural and crystallographic study of both materials, paying attention to the transitions between them. The morphology and crystallography of the laths comprising both microstructures are similar. The main differences were, in general, crystallographic orientation and texture. Whereas the foliated microstructure has a moderate sheet texture, with a defined 001 maximum, the chalk has a much weaker sheet texture, with a defined 011 maximum...
May 14, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29758689/dynamics-of-deformation-and-pinch-off-of-a-migrating-compound-droplet-in-a-tube
#14
Manash Pratim Borthakur, Gautam Biswas, Dipankar Bandyopadhyay
A computational fluid dynamic investigation has been carried out to study the dynamics of a moving compound droplet inside a tube. The motions associated with such a droplet is uncovered by solving the axisymmetric Navier-Stokes equations in which the spatiotemporal evolution of a pair of twin-deformable interfaces has been tracked employing the volume-of-fluid approach. The deformations at the interfaces and their subsequent dynamics are found to be stimulated by the subtle interplay between the capillary and viscous forces...
April 2018: Physical Review. E
https://www.readbyqxmd.com/read/29758532/evaluation-of-the-nova-vet-meter-for-sheep-side-monitoring-of-%C3%AE-hydroxybutyric-acid-bhba-and-description-of-ewe-bhba-during-late-gestation-in-three-flocks-from-the-northeastern-u-s
#15
Amanda K Jones, Rachael E Gately, Tasia D Kellogg, Steven A Zinn, Kristen E Govoni, Sarah A Reed
Prevention of metabolic diseases in small ruminants may improve production efficiency and profitability, yet ewes carrying multiples or who are in poor body condition are at increased susceptibility to develop ketosis. This study evaluated the hand-held Nova Vet Meter to accurately detect β-hydroxybutyric acid (BHBA) concentrations in ewes and determined the percentage of ewes at moderate (0.8 to 1.5 mmol/L BHBA) and greatest (≥1.6 mmol/L BHBA) risk to develop ketosis during late gestation. To validate the Nova Vet Meter, BHBA concentrations of 104 paired blood samples were measured using the Nova Vet Meter and gold-standard laboratory analysis...
May 7, 2018: Research in Veterinary Science
https://www.readbyqxmd.com/read/29758014/investigating-the-epigenetic-discrimination-of-identical-twins-using-buccal-swabs-saliva-and-cigarette-butts-in-the-forensic-setting
#16
Athina Vidaki, Vivian Kalamara, Elena Carnero-Montoro, Timothy D Spector, Jordana T Bell, Manfred Kayser
Monozygotic (MZ) twins are typically indistinguishable via forensic DNA profiling. Recently, we demonstrated that epigenetic differentiation of MZ twins is feasible; however, proportions of twin differentially methylated CpG sites (tDMSs) identified in reference-type blood DNA were not replicated in trace-type blood DNA. Here we investigated buccal swabs as typical forensic reference material, and saliva and cigarette butts as commonly encountered forensic trace materials. As an analog to a forensic case, we analyzed one MZ twin pair...
May 14, 2018: Genes
https://www.readbyqxmd.com/read/29757581/transmyometrial-embryo-transfer-as-a-useful-method-to-overcome-difficult-embryo-transfers-a-single-center-retrospective-study
#17
Janisse Ferreri Dos Anjos, Emma Gabriela Portillo Osorio, Joana Peñarrubia, Ester Vidal, Francisco Fábregues Gasol
OBJECTIVE: Pregnancy after an embryo transfer depends largely on embryo quality, endometrial receptivity, and the technique used in the embryo transfer. Embryo transfers have been reported as inevitably traumatic and difficult for 5-7% of patients in assisted reproduction treatment. In these cases, transmyometrial embryo transfer should be considered as a suitable method to overcome difficult embryo transfers. The aim of this study was to report our experience with this technique and analyze its causes, results and complications...
May 14, 2018: JBRA Assisted Reproduction
https://www.readbyqxmd.com/read/29757125/cross-cultural-comparison-of-genetic-and-cultural-transmission-of-smoking-initiation-using-an-extended-twin-kinship-model
#18
Hermine H Maes, Kate Morley, Michael C Neale, Kenneth S Kendler, Andrew C Heath, Lindon J Eaves, Nicholas G Martin
BACKGROUND: Considerable evidence from twin and adoption studies indicates that genetic and shared environmental factors play a role in the initiation of smoking behavior. Although twin and adoption designs are powerful to detect genetic and environmental influences, they do not provide information on the processes of assortative mating and parent-offspring transmission and their contribution to the variability explained by genetic and/or environmental factors. METHODS: We examined the role of genetic and environmental factors in individual differences for smoking initiation (SI) using an extended kinship design...
May 14, 2018: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/29756801/the-relationship-between-subjective-well-being-and-mortality-within-discordant-twin-pairs-from-two-independent-samples
#19
Gretchen R B Saunders, Irene J Elkins, Kaare Christensen, Matt McGue
Prior research has shown robust associations between greater subjective well-being (SWB) and reduced mortality. Whether this observed association is causal in nature or due instead to confounding genetic or environmental factors affecting both SWB and mortality is not well understood. We used a combined sample of 6,802 twins drawn from two cohorts: the Longitudinal Study of Middle-Aged Danish Twins (MADT; N = 2,815, baseline age between 45 and 69 years, M = 56.8, SD = 6.4) and the Longitudinal Study of Aging Danish Twins (LSADT; N = 3,987, baseline age between 70 and 97 years, M = 76...
May 2018: Psychology and Aging
https://www.readbyqxmd.com/read/29754148/age-prediction-of-children-and-adolescents-aged-6-17-years-an-epigenome-wide-analysis-of-dna-methylation
#20
Chunxiao Li, Wenjing Gao, Ying Gao, Canqing Yu, Jun Lv, Ruoran Lv, Jiali Duan, Ying Sun, Xianghui Guo, Weihua Cao, Liming Li
The DNA methylation age, a good reflection of human aging process, has been used to predict chronological age of adults and newborns. However, the prediction model for children and adolescents was absent. In this study, we aimed to generate a prediction model of chronological age for children and adolescents aged 6-17 years by using age-specific DNA methylation patterns from 180 Chinese twin individuals. We identified 6,350 age-related CpGs from the epigenome-wide association analysis (N=179). 116 known age-related sites in children were confirmed...
May 12, 2018: Aging
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