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https://www.readbyqxmd.com/read/28237326/metabolic-profiling-of-stages-of-healthy-pregnancy-in-hu-sheep-using-nuclear-magnetic-resonance-nmr
#1
Lingwei Sun, Yixuan Guo, Yixuan Fan, Haitao Nie, Ruocheng Wang, Feng Wang
Nutrition is one of the most important factors affecting the reproductive performance of animals. Changes in the ovine maternal metabolism during pregnancy are critical to fetal development. To understand the differences in ovine metabolic changes that occur during normal pregnancy, pregnant ewes carrying twin fetuses (n = 8) were selected at 35 days of gestation (dG). All ewes received 100% of National Research Council (NRC) requirements of all nutrients and energy during this experiment. At 50, 70, 90, and 110 dG, maternal plasma samples were collected and designated as one of four corresponding time points (T1, T2, T3, and T4, respectively)...
April 1, 2017: Theriogenology
https://www.readbyqxmd.com/read/28236812/unusual-twinning-resulting-in-chimerism-a-systematic-review-on-monochorionic-dizygotic-twins
#2
Henrike E Peters, Tamar E König, Marieke O Verhoeven, Roel Schats, Velja Mijatovic, Johannes C F Ket, Cornelis B Lambalk
Traditionally, it is understood that dizygotic (DZ) twins always have a dichorionic placenta. However, with 8% blood chimerism in DZ twins, placental sharing is probably more common than previously has been recognized. In this article, we will review all available cases of monochorionic dizygotic (MCDZ) twins. A total of 31 twins have been described in literature. A monochorionic diamniotic placenta is reported in all cases. Assisted reproductive technology is responsible for the origin of the pregnancy in 82...
February 27, 2017: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/28230406/test-retest-reliability-of-the-facial-expression-labeling-task
#3
Jennifer L Cecilione, Lance M Rappaport, Brad Verhulst, Dever M Carney, R J R Blair, Melissa A Brotman, Ellen Leibenluft, Daniel S Pine, Roxann Roberson-Nay, John M Hettema
Recognizing others' emotional expressions is vital for socioemotional development; impairments in this ability occur in several psychiatric disorders. Further study is needed to map the development of this ability and to evaluate its components as potential transdiagnostic endophenotypes. Before doing so, however, research is required to substantiate the test-retest reliability of scores of the face emotion identification tasks linked to developmental psychopathology. The current study estimated test-retest reliability of scores of one such task, the facial expression labeling task (FELT) among a sample of twin children (N = 157; ages 9-14)...
February 23, 2017: Psychological Assessment
https://www.readbyqxmd.com/read/28223478/phenotypic-and-genetic-evidence-for-a-unifactorial-structure-of-spatial-abilities
#4
Kaili Rimfeld, Nicholas G Shakeshaft, Margherita Malanchini, Maja Rodic, Saskia Selzam, Kerry Schofield, Philip S Dale, Yulia Kovas, Robert Plomin
Spatial abilities encompass several skills differentiable from general cognitive ability (g). Importantly, spatial abilities have been shown to be significant predictors of many life outcomes, even after controlling for g. To date, no studies have analyzed the genetic architecture of diverse spatial abilities using a multivariate approach. We developed "gamified" measures of diverse putative spatial abilities. The battery of 10 tests was administered online to 1,367 twin pairs (age 19-21) from the UK-representative Twins Early Development Study (TEDS)...
February 21, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28220550/metabolomic-profiling-in-umbilical-venous-plasma-reveals-effects-of-dietary-rumen-protected-arginine-or-n-carbamylglutamate-supplementation-in-nutrient-restricted-hu-sheep-during-pregnancy
#5
L Sun, H Zhang, Y Fan, Y Guo, G Zhang, H Nie, F Wang
Maternal nutrient restriction during pregnancy is a major problem worldwide for human and animal production. Arginine (Arg) is critical to health, growth and reproduction. N-carbamylglutamate (NCG), a key enzyme in arginine synthesis, is not extensively degraded in rumen. The aim of this study was to investigate ameliorating effects of rumen-protected arginine (RP-Arg) and NCG supplementation on dietary in undernourished Hu sheep during gestation. From day 35 to 110 of gestation, 32 Hu ewes carrying twin foetuses were randomly divided into four groups: a control (CG) group (n = 8; fed 100% National Research Council (NRC) requirements for pregnant sheep), a nutrient-restricted (RG) group (n = 8; fed 50% NRC requirements, which included 50% mineral-vitamin mixture) and two treatment (Arg and NCG) groups (n = 8; fed 50% NRC requirements supplemented with 20 g/day RP-Arg or 5 g/day NCG, which included 50% mineral-vitamin mixture)...
February 20, 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/28215407/a-simplified-vocal-profile-analysis-protocol-for-the-assessment-of-voice-quality-and-speaker-similarity
#6
Eugenia San Segundo, Jose A Mompean
OBJECTIVES: A simplified perceptual protocol for the assessment of voice quality (VQ) is attempted based on the Vocal Profile Analysis (VPA) scheme, with the aim of alleviating typical issues associated with the multidimensionality of VQ and enabling an easy quantification of speaker similarity. STUDY DESIGN: Twenty-four non-pathological male speakers (12 monozygotic twin pairs) of Standard Peninsular Spanish were perceptually evaluated by two trained phoneticians using the simplified VPA (SVPA)...
February 15, 2017: Journal of Voice: Official Journal of the Voice Foundation
https://www.readbyqxmd.com/read/28215053/-the-first-intervention-is-leaving-home-reasons-for-electing-an-out-of-hospital-birth-among-minnesotan-mothers
#7
Helen Hazen
The Twin Cities, Minnesota has seen a recent increase in the number of mothers seeking an out-of-hospital birth. This research uses in-depth interviews with 24 mothers who intended an out-of-hospital birth in the previous two years, exploring their reasons for pursuing an alternative approach to birth. For many women an out-of-hospital birth fits within a philosophy that rejects the pathologizing of birth. Escaping rigid hospital protocols is seen as critical to avoiding what many mothers described as unnecessary interventions...
February 18, 2017: Medical Anthropology Quarterly
https://www.readbyqxmd.com/read/28207240/interfaces-in-heterogeneous-catalysts-advancing-mechanistic-understanding-through-atomic-scale-measurements
#8
Wenpei Gao, Zachary D Hood, Miaofang Chi
Developing novel catalysts with high efficiency and selectivity is critical for enabling future clean energy conversion technologies. Interfaces in catalyst systems have long been considered the most critical factor in controlling catalytic reaction mechanisms. Interfaces include not only the catalyst surface but also interfaces within catalyst particles and those formed by constructing heterogeneous catalysts. The atomic and electronic structures of catalytic surfaces govern the kinetics of binding and release of reactant molecules from surface atoms...
February 16, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28194760/developmental-psychopathology-in-the-post-genomics-era-substantial-challenges-but-reasons-for-hope
#9
EDITORIAL
Jeffrey M Halperin
One only has to quickly look through the Table of Contents for this issue of JCPP to gain an appreciation of the ever-increasing influence of genetic research in the field of developmental psychopathology. Among the 13 articles in this issue that follow this editorial: two employ large family and/or twin studies to provide compelling behavioral genetic findings bolstering the importance of genes in the emergence of ADHD (Chen, Brikell, Lichtenstein, Serlachius, Kuja-Halkola, Sandin, and Larsson) and level of educational achievement in adolescents (Lewis, Asbury, and Plomin); one paper focuses on cortical development in patients with 22q11...
March 2017: Journal of Child Psychology and Psychiatry, and Allied Disciplines
https://www.readbyqxmd.com/read/28185911/transcriptome-analysis-of-monozygotic-twin-brothers-with-childhood-primary-myelofibrosis
#10
Nan Ding, Zhaojun Zhang, Wenyu Yang, Lan Ren, Yingchi Zhang, Jingliao Zhang, Zhanqi Li, Peihong Zhang, Xiaofan Zhu, Xiaojuan Chen, Xiangdong Fang
Primary myelofibrosis (PMF) is a chronic myeloproliferative disorder in human bone marrow. Over 50% of patients with myelofibrosis have mutations in JAK2, MPL, or CALR. However, these mutations are rarely detected in children, suggesting a difference in the pathogenesis of childhood PMF. In this study, we investigated the response to drug treatment of a monozygotic twin pair with typical childhood PMF. The twin exhibited different clinical outcomes despite following the same treatment regimen. The transcriptomic profiles of patient samples after drug treatment (E2 and Y2) were significantly different between the twin pair, which is consistent with the observation that the drug treatment was effective only in the younger brother, despite the twin being genetically identical...
February 7, 2017: Genomics, Proteomics & Bioinformatics
https://www.readbyqxmd.com/read/28183618/evaluation-of-the-osteo-inductive-potential-of-hollow-three-dimensional-magnesium-strontium-substitutes-for-the-bone-grafting-application
#11
Mei Li, Xuan Yang, Weidan Wang, Yu Zhang, Peng Wan, Ke Yang, Yong Han
Regeneration of bone defects is a clinical challenge that usually necessitates bone grafting materials. Limited bone supply and donor site morbidity limited the application of autografting, and improved biomaterials are needed to match the performance of autografts. Osteoinductive materials would be the perfect candidates for achieving this task. Strontium (Sr) is known to encourage bone formation and also prevent osteoporosis. Such twin requirements have motivated researchers to develop Sr-substituted biomaterials for orthopedic applications...
April 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28163210/are-people-with-chronic-low-back-pain-meeting-the-physical-activity-guidelines-a-co-twin-control-study
#12
Joshua Robert Zadro, Debra Shirley, Anita Amorim, Francisco Pérez-Riquelme, Juan R Ordoñana, Paulo H Ferreira
BACKGROUND: Despite a large amount of research investigating physical activity (PA) levels in people with chronic low back pain (LBP), no study has investigated whether people with chronic LBP are meeting the World Health Organization (WHO) PA guidelines. Furthermore, with genetics and the early shared environment substantially influencing the presence of LBP and PA engagement, these factors could confound the association between LBP and PA and need to be controlled for. PURPOSE: This study aimed to investigate the association between chronic LBP and meeting the PA guidelines, while controlling for the effects of genetics and early shared environment...
February 2, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28151560/developmental-change-in-the-association-between-adolescent-depressive-symptoms-and-the-home-environment-results-from-a-longitudinal-genetically-informative-investigation
#13
Laurie J Hannigan, Tom A McAdams, Thalia C Eley
BACKGROUND: Depression is already highly prevalent by late adolescence, indicating that research into its developmental emergence should consider earlier risk factors and environmental contexts. The home environment is a key context for children and adolescents throughout development. However, the nature of relationships that exist between aspects of the home environment and the development of depressive symptoms cannot be assumed. Genetically informative studies have been used to provide insights about the aetiology of such relationships, often finding them to be partly confounded by the influence of children's genes...
February 2, 2017: Journal of Child Psychology and Psychiatry, and Allied Disciplines
https://www.readbyqxmd.com/read/28150444/the-influence-of-chorionicity-and-gestational-age-at-single-fetal-loss-on-the-risk-of-preterm-birth-in-twin-pregnancies-analysis-of-the-stork-multiple-pregnancy-cohort
#14
Francesco D'Antonio, Basky Thilaganathan, Tiran Dias, Asma Khalil
BACKGROUND: Single intrauterine death (sIUD) in twin pregnancies is associated with a significant risk of co-twin demise and preterm birth (PTB), especially in monochorionic (MC) twins. However, it is yet to be established whether the gestational age at loss may influence the pregnancy outcome. The aim of this study was to explore the risk of PTB according to the gestational age at the diagnosis of sIUD. METHODS: A cohort study of all twin pregnancies from a large regional network of 9 hospitals over a ten-year period...
February 2, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28135689/test-retest-reliability-and-validity-of-a-frustration-paradigm-and-irritability-measures
#15
Wan-Ling Tseng, Elizabeth Moroney, Laura Machlin, Roxann Roberson-Nay, John M Hettema, Dever Carney, Joel Stoddard, Kenneth A Towbin, Daniel S Pine, Ellen Leibenluft, Melissa A Brotman
BACKGROUND: Data on the reliability and validity of assessments for irritability, particularly behavioral paradigms, are limited. This study examined the test-retest reliability and validity of a frustration paradigm (the Affective Posner 2 task) and two irritability measures [the Affective Reactivity Index (ARI) and Child Behavior Checklist (CBCL) irritability]. METHODS: Participants were 109 youth from a general population sample of twins (aged 9-14 years). Participants completed two visits that were 2-4 weeks apart...
January 23, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/28134072/lessons-on-dietary-biomarkers-from-twin-studies
#16
Cristina Menni
Metabolomic and microbiome profiling are promising tools to identify biomarkers of food intake and health status. The individual's genetic makeup plays a significant role on health, metabolism, gut microbes and diet and twin studies provide unique opportunities to untangle gene-environment effects on complex phenotypes. This brief review discusses the value of twin studies in nutrition research with a particular focus on metabolomics and the gut microbiome. Although, the twin model is a powerful tool to segregate the genetic component, to date, very few studies combine the twin design and metabolomics/microbiome in nutritional sciences...
January 30, 2017: Proceedings of the Nutrition Society
https://www.readbyqxmd.com/read/28120107/are-assisted-reproduction-technologies-associated-with-categorical-or-dimensional-aspects-of-psychopathology-in-childhood-adolescence-or-early-adulthood-results-from-a-danish-prospective-nationwide-cohort-study
#17
T Klausen, K Juul Hansen, P Munk-Jørgensen, C Mohr-Jensen
An increasing number of children are conceived using assisted reproduction technologies (ART), but little is known about the long-term risk in terms of mental health outcomes. All twin and singleton children conceived via ART and born in 1995 were sampled from the Danish in vitro fertilization registry and matched to four spontaneously conceived (SC) children. The children were followed-up at the age of 3, 7, 14 and 18 years in the Danish Psychiatric Central Research Registry, to estimate the prevalence of all possible psychiatric diagnoses; dimensional aspects of psychopathology were assessed at the age of 14 years, using the Child Behavior Checklist (CBCL)...
January 24, 2017: European Child & Adolescent Psychiatry
https://www.readbyqxmd.com/read/28106987/constructing-ultraporous-covalent-organic-frameworks-in-seconds-via-an-organic-terracotta-process
#18
Suvendu Karak, Sharath Kandambeth, Bishnu P Biswal, Himadri Sekhar Sasmal, Sushil Kumar, Pradip Pachfule, Rahul Banerjee
Research on covalent organic frameworks (COFs) has recently gathered significant momentum by the virtue of their predictive design, controllable porosity, and long-range ordering. However, the lack of solvent-free and easy-to-perform synthesis processes appears to be the bottleneck toward their greener fabrication, thereby limiting their possible potential applications. To alleviate such shortcomings, we demonstrate a simple route toward the rapid synthesis of highly crystalline and ultraporous COFs in seconds using a novel salt-mediated crystallization approach...
January 30, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28105968/situs-inversus-totalis-in-twins-a-brief-review-and-a-life-history-twin-research-twin-studies-of-trisomy-21-monozygotic-twin-concordance-for-bilateral-coronoid-hyperplasia-prenatal-hormonal-effects-in-mixed-sex-non-human-primate-litters-insurance-mandates-and
#19
Nancy L Segal
The presence of situs inversus totalis (full reversal of internal organs) in twins is briefly reviewed. Information gathered from 35-year-old monozygotic (MZ) female twin pair discordant for this condition is presented. This is followed by summaries of research on the frequency of trisomy 21 (Down syndrome) in twins, the first case of MZ twin concordance for bilateral coronoid hyperplasia, prenatal hormonal effects in mixed-sex non-human primate litters, and links between insurance mandates and twinning following in vitro fertilization...
February 2017: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/28105963/prevalence-and-heritability-of-early-childhood-caries-among-monozygotic-and-dizygotic-twins
#20
Anuradha Kuppan, Steven Rodrigues, Victor Samuel, Mahesh Ramakrishnan, Hassan S Halawany, Nimmi B Abraham, Vimal Jacob, Sukumaran Anil
Deciphering the relative importance of genetic and environmental factors, which play a major role in the prevalence of early childhood caries (ECC), can help clinicians with planning a long-term preventive treatment. The objective of the study was to determine the prevalence and heritability of ECC among monozygotic (MZ) and dizygotic (DZ) twins in Chennai, India, in the year 2013. A cross-sectional study was designed to estimate the prevalence of ECC among twins. Zygosity classification for the survey framework was adapted from a highly accurate parental report questionnaire pertaining to the physical similarity between twins...
February 2017: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
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