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Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies

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https://www.readbyqxmd.com/read/30428952/age-sex-and-genetic-and-environmental-effects-on-unintentional-injuries-in-young-and-adult-twins
#1
Simo Salminen, Eero Vuoksimaa, Richard J Rose, Jaakko Kaprio
The aim of this study was to examine the effects of genetic and environment influences and sex on injury involvement using two sets of Finnish twin data. The younger participants were 955 twins born between 1983 and 1987, aged 20 to 24 years. The older participants were 12,428 twins born between 1930 and 1957, aged 33 to 60 years. Within-twin correlations in monozygotic and dizygotic twins suggested that genetic effects play no role in injury involvement among young twins, but do have some effect at older ages...
November 15, 2018: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/30392485/the-x-linked-analog-of-the-hardy-weinberg-law
#2
Alan E Stark
The system of mating that maintains a general genotypic distribution among females with respect to an X-linked locus is defined. In particular, it is shown that Hardy-Weinberg proportions can be maintained with non-random mating.
November 5, 2018: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/30376909/genetic-and-environmental-overlaps-among-sasang-constitution-types-a-multivariate-twin-study
#3
Yoon-Mi Hur, Siwoo Lee, Hee-Jeong Jin
According to the Sasang theory, humans can be categorized into one of the four Sasang constitution (SC) types. The four SC types are Tae-Yang (TY), Tae-Eum (TE), So-Yang (SY), and So-Eum (SE), which are determined mainly on the basis of anthropometric characteristics, personality, and the balance of the physiological functions of the major organ systems. There is a growing recognition in the complementary and alternative medicine area that SC types have the potential to be a useful scientific tool for the prevention, diagnosis, and treatment of diseases (Cooper, Evidence Based Complementary and Alternative Medicine, Vol...
October 31, 2018: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/30375322/major-discordant-structural-anomalies-in-monochorionic-twins-spectrum-and-outcomes
#4
Maria Angela Rustico, Mariano Lanna, Stefano Faiola, Daniela Casati, Luigina Spaccini, Andrea Righini, Cecilia Parazzini, Marcello Napolitano, Barbara Scelsa, Gianluca Lista, Carla Corti, Giovanna Riccipetitoni, Irene Cetin
Monochorionic twins, resulting from a single fertilized egg giving rise to two separate embryos, are monozygotic and considered genetically identical. However, discordant phenotypes have been reported in monozygotic twins. We analyzed a retrospective cohort of 155 monochorionic pregnancies (312 twins) with major discordant structural anomalies coded by the ICD-10 system in order to describe the spectrum of anomalies, the management of the pregnancies, and the perinatal outcome. Treatment options included conservative management, selective feticide with bipolar cord coagulation, or complete termination...
October 30, 2018: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/30375300/diagnosing-zygosity-in-giant-panda-twins-using-short-tandem-repeats
#5
Maiju Qiao, Yingmin Zhou, Thomas Connor, Rengui Li, Dan Tang, Hemin Zhang, Jianghong Ran
The giant panda, native to mountains of south-west China, is one of the world's rarest bear species and is subject to considerable conservation effort. In captivity, the proportion of twins accounts for 54% of the total number of births. To date, little is known about zygosity in panda populations - specifically, the proportion of monozygotic and dizygotic twins. In this study, we used 10 microsatellite markers for reliable zygosity testing, and the probability of monozygotic twins was 99.963% when all 10 markers were concordant...
October 30, 2018: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/30345945/single-intrauterine-death-in-twins-the-importance-of-fetal-order
#6
Penelope L Ward, Karen L Reidy, Ricardo Palma-Dias, Lex W Doyle, Mark P Umstad
Perinatal mortality is higher in twins. Effects of twin order have not previously been studied in the context of single fetal demise. Our objective was to determine whether death of the fetus more proximal to the cervix will result in worse perinatal outcomes. Our population included multiple pregnancies with two viable fetuses confirmed prior to 20 weeks' gestation with the subsequent death of at least one twin. All the pregnancies were managed at The Royal Women's Hospital, Melbourne between 2006 and 2014...
October 22, 2018: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/30293537/a-further-comment-on-large-scale-cognitive-gwas-meta-analysis-reveals-tissue-specific-neural-expression-and-potential-nootropic-drug-targets-by-lam-et-al
#7
W D Hill
Lam et al. (2018) respond to a commentary of their paper entitled 'Large-Scale Cognitive GWAS Meta-Analysis Reveals Tissue-Specific Neural Expression and Potential Nootropic Drug Targets' Lam et al. (2017). While Lam et al. (2018) have now provided the recommended quality control metrics for their paper, problems remain. Specifically, Lam et al. (2018) do not dispute that the results of their multi-trait analysis of genome-wide association study (MTAG) analysis has produced a phenotype with a genetic correlation of one with three measures of education, but do claim the associations found are specific to the trait of cognitive ability...
October 8, 2018: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/30246684/from-genes-to-behavior-through-sex-hormones-and-socialization-the-example-of-gender-development-erratum
#8
Sheri A Berenbaum, Adriene M Beltz
No abstract text is available yet for this article.
September 24, 2018: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/30284534/thg-volume-21-issue-5-cover-and-back-matter
#9
(no author information available yet)
No abstract text is available yet for this article.
October 2018: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/30284533/thg-volume-21-issue-5-cover-and-front-matter
#10
(no author information available yet)
No abstract text is available yet for this article.
October 2018: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/30284532/abstracts-for-the-42nd-human-genetics-society-of-australasia-annual-scientific-meeting-sydney-new-south-wales-august-4-7-2018
#11
(no author information available yet)
No abstract text is available yet for this article.
October 2018: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/30284531/abstracts-for-the-42nd-human-genetics-society-of-australasia-annual-scientific-meeting-sydney-new-south-wales-august-4-7-2018
#12
(no author information available yet)
No abstract text is available yet for this article.
October 2018: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/30201058/are-the-variants-of-the-circle-of-willis-determined-by-genetic-or-environmental-factors-results-of-a-twin-study-and-review-of-the-literature
#13
Bianka Forgo, Adam Domonkos Tarnoki, David Laszlo Tarnoki, Daniel Tamas Kovacs, Laszlo Szalontai, Aliz Persely, Anita Hernyes, Marcell Szily, Levente Littvay, Emanuela Medda, Adam Szabo, Lajos Rudolf Kozak, Gabor Rudas, Attila Sas, Marianna Sepsi, Laszlo Kostyal, Csaba Olah
BACKGROUND: Anatomic variants of the circle of Willis (CW) are commonly observed in healthy subjects. Genetic and environmental factors influencing these variants remain unclear. Our aim was to assess the genetic and environmental background affecting variant CW phenotypes. METHODS: A total of 122 adult healthy twins from the Hungarian Twin Registry (39 monozygotic (MZ) and 22 dizygotic (DZ) pairs, average age 49.7 ± 13.4 years) underwent Time-of-Flight magnetic resonance angiography and transcranial Doppler sonography...
October 2018: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/30131086/twins-switched-at-birth-frequency-life-histories-twin-relationships-and-critical-issues-twin-research-reviews-classroom-placement-mirror-syndrome-unusual-twinning-parenting-stress-human-interest-triplet-film-educational-achievement-prison-release-co-twin-impersonation
#14
Nancy L Segal
Twins switched at birth are a rare subtype of twins who grow up apart. The frequency with which this event occurs, as well as selected life history events, twin relationships, and critical issues generated by the nine recorded cases are reviewed. This is followed by summaries of recent studies addressing classroom placement for twins, mirror syndrome in mothers, unusual twin types, and parenting stress. The article concludes with a review of human interest items from the general media, namely a triplet film, educational achievement, prison release, co-twin impersonation, and facial recognition technology...
October 2018: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/30064533/four-generation-pedigree-of-monozygotic-female-twins-reveals-genetic-factors-in-twinning-process-by-whole-genome-sequencing
#15
Shiqi Liu, Yaqiang Hong, Kai Cui, Jinxia Guan, Lu Han, Wei Chen, Zhe Xu, Kenan Gong, Yang Ou, Changqing Zeng, Sheng Li, Dake Zhang, Dawei Hu
Familial monozygotic (MZ) twinning reports are rare around the world, and we report a four-generation pedigree with seven recorded pairs of female MZ twins. Whole-genome sequencing of seven family members was performed to explore the featured genetic factors in MZ twins. For variations specific to MZ twins, five novel variants were observed in the X chromosome. These candidates were used to explain the seemingly X-linked dominant inheritance pattern, and only one variant was exonic, located at the 5'UTR region of ZCCHC12 (chrX: 117958597, G > A)...
October 2018: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/30017014/the-genetic-relationship-between-psychological-distress-somatic-distress-affective-disorders-and-substance-use-in-young-australian-adults-a-multivariate-twin-study
#16
Lun-Hsien Chang, Baptiste Couvy-Duchesne, Sarah E Medland, Nathan A Gillespie, Ian B Hickie, Richard Parker, Nicholas G Martin
Psychological distress (PSYCH), somatic distress (SOMA), affective disorders (AD), and substance use (SU) frequently co-occur. The genetic relationship between PSYCH and SOMA, however, remains understudied. We examined the genetic and environmental influences on these two disorders and their comorbid AD and SU using structural equation modeling. Self-reported PSYCH and SOMA were measured in 1,548 twins using the two subscales of a 12-item questionnaire, the Somatic and Psychological Health Report. Its reliability and psychometric properties were examined...
October 2018: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/30001766/multi-trait-analysis-of-gwas-and-biological-insights-into-cognition-a-response-to-hill-2018
#17
Max Lam, Joey W Trampush, Jin Yu, Emma Knowles, Srdjan Djurovic, Ingrid Melle, Kjetil Sundet, Andrea Christoforou, Ivar Reinvang, Pamela DeRosse, Astri J Lundervold, Vidar M Steen, Thomas Espeseth, Katri Räikkönen, Elisabeth Widen, Aarno Palotie, Johan G Eriksson, Ina Giegling, Bettina Konte, Panos Roussos, Stella Giakoumaki, Katherine E Burdick, Antony Payton, William Ollier, Ornit Chiba-Falek, Deborah K Attix, Anna C Need, Elizabeth T Cirulli, Aristotle N Voineskos, Nikos C Stefanis, Dimitrios Avramopoulos, Alex Hatzimanolis, Dan E Arking, Nikolaos Smyrnis, Robert M Bilder, Nelson A Freimer, Tyrone D Cannon, Edythe London, Russell A Poldrack, Fred W Sabb, Eliza Congdon, Emily Drabant Conley, Matthew A Scult, Dwight Dickinson, Richard E Straub, Gary Donohoe, Derek Morris, Aiden Corvin, Michael Gill, Ahmad R Hariri, Daniel R Weinberger, Neil Pendleton, Panos Bitsios, Dan Rujescu, Jari Lahti, Stephanie Le Hellard, Matthew C Keller, Ole A Andreassen, David C Glahn, Anil K Malhotra, Todd Lencz
Hill (Twin Research and Human Genetics, Vol. 21, 2018, 84-88) presented a critique of our recently published paper in Cell Reports entitled 'Large-Scale Cognitive GWAS Meta-Analysis Reveals Tissue-Specific Neural Expression and Potential Nootropic Drug Targets' (Lam et al., Cell Reports, Vol. 21, 2017, 2597-2613). Specifically, Hill offered several interrelated comments suggesting potential problems with our use of a new analytic method called Multi-Trait Analysis of GWAS (MTAG) (Turley et al., Nature Genetics, Vol...
October 2018: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/29976271/carotid-artery-atherosclerosis-a-review-on-heritability-and-genetics
#18
Bianka Forgo, Emanuela Medda, Anita Hernyes, Laszlo Szalontai, David Laszlo Tarnoki, Adam Domonkos Tarnoki
Carotid atherosclerosis (CAS) is associated with increased cardiovascular risk, and therefore, assessing the genetic versus environmental background of CAS traits is of key importance. Carotid intima-media-thickness and plaque characteristics seem to be moderately heritable, with remarkable differences in both heritability and presence or severity of these traits among ethnicities. Although the considerable role of additive genetic effects is obvious, based on the results so far, there is an important emphasis on non-shared environmental factors as well...
October 2018: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/29976260/how-consistent-are-genetic-factors-in-explaining-leisure-time-physical-activity-and-sport-participation-the-portuguese-healthy-families-study
#19
Sara Pereira, Peter T Katzmarzyk, Thayse N Gomes, Robert Elston, José Maia
This study investigates how consistent genetic factors are, as measured by heritability estimates (h2), in the leisure-time physical activity index (LTPAI) and sport participation index (SPI) from early (10-14 yrs) to late adolescence (15-19 yrs). The sample comprises 12,385 subjects from 3,378 Portuguese nuclear families. Height and weight were measured and body mass index (BMI) was calculated, and the LTPAI and SPI were estimated by questionnaire. Socioeconomic status (SES) was assessed by parental occupation...
October 2018: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/29929564/heritability-of-hwabyung-symptoms-in-south-korean-adolescent-and-young-adult-twins
#20
Yoon-Mi Hur, Eun-Ji Choi, Jong-Woo Kim, Hee-Jeong Jin, Siwoo Lee
The present study aimed to estimate heritability of Hwabyung (HB) symptoms in adolescent and young adult twins in South Korea. The sample included 1,601 twins consisting of 143 pairs of monozygotic male (MZM), 67 pairs of dizygotic male (DZM), 295 pairs of monozygotic female (MZF), 114 pairs of dizygotic female (DZF), and 117 pairs of opposite-sex dizygotic (OSDZ) twins and 129 twins with non-participating co-twins (mean age = 19.1 ± 3.1 years; range: 12-29 years). An HB symptom questionnaire was given to twins via a telephone interview...
October 2018: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
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