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Ahemaitijiang N, Ren H, Wang H, Han ZR. Longitudinal association between emotion-related parenting behavior and child aggression: The moderating role of parent-child physiological synchrony. Aggress Behav 2021; 47:267-275. [PMID: 33377187 DOI: 10.1002/ab.21945] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2019] [Revised: 12/01/2020] [Accepted: 12/14/2020] [Indexed: 01/13/2023]
Abstract
Considering the high prevalence of aggressive problems found in middle childhood and their negative impacts on children's overall adjustment, it is important to explore factors that may give rise to childhood aggression, as well as the underlying mechanisms involved within the family context. Applying a biopsychosocial approach, the aim of our study was to examine the relations between emotion-related parenting behavior (ERPB, e.g., parental psychological control and parental emotion dysregulation) and childhood aggression with a focus on the potential moderating effects of parent-child physiological synchrony on these relations. Eighty-nine parent-child dyads (total N = 178) participated in the study (child M age = 8.76 years, SD = 1.81 years, 49 boys). At T1, ERPB was observed and coded from dyadic interaction and parent-child physiological synchrony was assessed using interbeat interval (IBI) calculated from the participant's heart rate (HR) during an interaction task. Parents also reported their child's aggressive behavior at T1 and 9 months later (T2). The results showed that for children demonstrating stronger physiological synchrony with their parents, higher levels of parental psychological control and parental emotion dysregulation predicted their more aggressive behavior. Our findings suggest that for certain negative types of ERPB, parent-child physiological synchrony seems to be a risk factor for the development of children's aggressive behavior.
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Affiliation(s)
- Nigela Ahemaitijiang
- Beijing Key Laboratory of Applied Experimental Psychology, National Demonstration Center for Experimental Psychology Education, Faculty of Psychology Beijing Normal University Beijing China
| | - Haining Ren
- Beijing Key Laboratory of Applied Experimental Psychology, National Demonstration Center for Experimental Psychology Education, Faculty of Psychology Beijing Normal University Beijing China
| | - Hui Wang
- Beijing Key Laboratory of Applied Experimental Psychology, National Demonstration Center for Experimental Psychology Education, Faculty of Psychology Beijing Normal University Beijing China
| | - Zhuo Rachel Han
- Beijing Key Laboratory of Applied Experimental Psychology, National Demonstration Center for Experimental Psychology Education, Faculty of Psychology Beijing Normal University Beijing China
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2
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Carroll IC, Planalp EM, Van Hulle CA, Goldsmith HH. Peer Victimization and Selective Attention in Adolescence: Evidence from a Monozygotic Twin Difference Design. JOURNAL OF ABNORMAL CHILD PSYCHOLOGY 2019; 47:1303-1313. [PMID: 30706250 PMCID: PMC6620147 DOI: 10.1007/s10802-019-00516-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Peer victimization impacts 13% of adolescents worldwide (Currie et al. 2012). Despite its prevalence and associated adverse outcomes, global cognitive processes that could be affected by peer victimization have not been thoroughly investigated. Using a monozygotic (MZ) twin difference design that rigorously controls for the influence of genetic and familial level confounders, we examined the relation between peer victimization exposure and selective attention processes during an affective go/no go task. Twins who experienced more severe peer victimization were biased towards detecting goal relevant stimuli during the task. Our findings suggest an environmentally salient relation between peer victimization and goal oriented selective attention. Future work should investigate how this process might serve to enhance or buffer risk of peer victimization exposure for developing later adverse outcomes.
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Affiliation(s)
- Ian C Carroll
- Department of Psychology, Waisman Center, University of Wisconsin-Madison, 1500 Highland Ave, Madison, WI, 53705, USA.
| | - Elizabeth M Planalp
- Department of Psychology, Waisman Center, University of Wisconsin-Madison, 1500 Highland Ave, Madison, WI, 53705, USA
| | | | - H Hill Goldsmith
- Department of Psychology, Waisman Center, University of Wisconsin-Madison, 1500 Highland Ave, Madison, WI, 53705, USA
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Tremblay RE, Côté SM. Sex differences in the development of physical aggression: An intergenerational perspective and implications for preventive interventions. Infant Ment Health J 2019; 40:129-140. [DOI: 10.1002/imhj.21760] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Richard E. Tremblay
- Departments of Pediatrics and Psychology, University of Montreal; School of Public Health; Physiotherapy and Sport Science, University College Dublin; Dublin Ireland
| | - Sylvana M. Côté
- Social and Preventive Medicine; University of Montreal; Université de Bordeaux, INSERM U1219; Bordeaux France
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4
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E. Tremblay R. Développement des agressions physiques de la petite enfance à l’âge adulte. ENFANCE 2018. [DOI: 10.3917/enf2.183.0407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Tremblay RE, Vitaro F, Côté SM. Developmental Origins of Chronic Physical Aggression: A Bio-Psycho-Social Model for the Next Generation of Preventive Interventions. Annu Rev Psychol 2017; 69:383-407. [PMID: 29035692 DOI: 10.1146/annurev-psych-010416-044030] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
This review describes a bio-psycho-social approach to understanding and preventing the development of chronic physical aggression. The debate on the developmental origins of aggression has historically opposed genetic and environmental mechanisms. Recent studies have shown that the frequency of physical aggression peaks in early childhood and then decreases until old age. Molecular genetic studies and twin studies have confirmed important genetic influences. However, recent epigenetic studies have highlighted the important role of environments in gene expression and brain development. These studies suggest that interrelated bio-psycho-social channels involved in the development of chronic physical aggression are generally the product of an intergenerational transmission process occurring through assortative mating, genetic inheritance, and the inheritance of physical and social environmental conditions that handicap brain functioning and support the use of physical aggression to solve problems. Given these intergenerational mechanisms and physical aggression onset in infancy, it appears clear that preventive interventions should start early in pregnancy, at the latest.
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Affiliation(s)
- Richard E Tremblay
- Department of Pediatrics and Department of Psychology, University of Montreal, Montreal QC H3T 1J4, Canada;
| | - Frank Vitaro
- School of Psychoeducation, University of Montreal, Montreal QC H3T 1J4, Canada;
| | - Sylvana M Côté
- Department of Social and Preventive Medicine, University of Montreal, Montreal QC H3T 1J4, Canada; .,INSERM U1219, University of Bordeaux, 33400 Talence, France
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6
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Richards JS, Vásquez AA, van Rooij D, van der Meer D, Franke B, Hoekstra PJ, Heslenfeld DJ, Oosterlaan J, Faraone SV, Hartman CA, Buitelaar JK. Testing differential susceptibility: Plasticity genes, the social environment, and their interplay in adolescent response inhibition. World J Biol Psychiatry 2017; 18:308-321. [PMID: 27170266 PMCID: PMC5435559 DOI: 10.3109/15622975.2016.1173724] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVES Impaired inhibitory control is a key feature of attention-deficit/hyperactivity disorder (ADHD). We investigated gene-environment interaction (GxE) as a possible contributing factor to response inhibition variation in context of the differential susceptibility theory. This states individuals carrying plasticity gene variants will be more disadvantaged in negative, but more advantaged in positive environments. METHODS Behavioural and neural measures of response inhibition were assessed during a Stop-signal task in participants with (N = 197) and without (N = 295) ADHD, from N = 278 families (age M = 17.18, SD =3.65). We examined GxE between candidate plasticity genes (DAT1, 5-HTT, DRD4) and social environments (maternal expressed emotion, peer affiliation). RESULTS A DRD4 × Positive peer affiliation interaction was found on the right fusiform gyrus (rFG) activation during successful inhibition. Further, 5-HTT short allele carriers showed increased rFG activation during failed inhibitions. Maternal warmth and positive peer affiliation were positively associated with right inferior frontal cortex activation during successful inhibition. Deviant peer affiliation was positively related to the error rate. CONCLUSIONS While a pattern of differential genetic susceptibility was found, more clarity on the role of the FG during response inhibition is warranted before firm conclusions can be made. Positive and negative social environments were related to inhibitory control. This extends previous research emphasizing adverse environments.
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Affiliation(s)
- Jennifer S. Richards
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behaviour, Radboud university medical center, Nijmegen, The Netherlands,Karakter Child and Adolescent Psychiatry University Centre, Nijmegen, The Netherlands
| | - Alejandro Arias Vásquez
- Department of Human Genetics, Donders Institute for Brain, Cognition and Behaviour, Radboud university medical center, Nijmegen, The Netherlands,Department of Psychiatry, Donders Institute for Brain, Cognition and Behaviour, Radboud university medical center, Nijmegen, The Netherlands
| | - Daan van Rooij
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behaviour, Radboud university medical center, Nijmegen, The Netherlands
| | - Dennis van der Meer
- University of Groningen, University Medical Center Groningen, Department of Psychiatry, The Netherlands
| | - Barbara Franke
- Department of Human Genetics, Donders Institute for Brain, Cognition and Behaviour, Radboud university medical center, Nijmegen, The Netherlands,Department of Psychiatry, Donders Institute for Brain, Cognition and Behaviour, Radboud university medical center, Nijmegen, The Netherlands
| | - Pieter J. Hoekstra
- University of Groningen, University Medical Center Groningen, Department of Psychiatry, The Netherlands
| | - Dirk J. Heslenfeld
- Department of Clinical Neuropsychology, VU University Amsterdam, Amsterdam, The Netherlands
| | - Jaap Oosterlaan
- Department of Clinical Neuropsychology, VU University Amsterdam, Amsterdam, The Netherlands
| | - Stephen V. Faraone
- SUNY Upstate Medical University Center, Departments of Psychiatry and of Neuroscience and Physiology, Syracuse, USA and the K.G. Jebsen Centre for Research on Neuropsychiatric Disorders, University of Bergen, Bergen, Norway
| | - Catharina A. Hartman
- University of Groningen, University Medical Center Groningen, Department of Psychiatry, The Netherlands
| | - Jan K. Buitelaar
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behaviour, Radboud university medical center, Nijmegen, The Netherlands,Karakter Child and Adolescent Psychiatry University Centre, Nijmegen, The Netherlands
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Dietary Intake at 9 Years and Subsequent Body Mass Index in Adolescent Boys and Girls: A Study of Monozygotic Twin Pairs. Twin Res Hum Genet 2016; 19:47-59. [PMID: 26810866 DOI: 10.1017/thg.2015.97] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
There is a lack of evidence pointing to specific dietary elements related to weight gain and obesity prevention in childhood and adulthood. Dietary intake and obesity are both inherited and culturally transmitted, but most prospective studies on the association between diet and weight status do not take genetics into consideration. The objective of this study was to document the association between dietary intake at 9 years and subsequent Body Mass Index (BMI) in adolescent monozygotic boy and girl twin pairs. This research used data from 152 twin pairs. Dietary data were collected from two 24-hour-recall interviews with a parent and the child aged 9 years. Height and weight were obtained when the twins were aged 9, 12, 13, and 14 years. Intrapair variability analysis was performed to identify dietary elements related to BMI changes in subsequent years. BMI-discordant monozygotic twin pairs were also identified to analyze the dietary constituents that may have generated the discordance. After eliminating potential confounding genetic factors, pre-adolescent boys who ate fewer grain products and fruit and consumed more high-fat meat and milk had higher BMIs during adolescence; pre-adolescent girls who consumed more grain products and high-fat meat and milk had higher BMIs during adolescence. Energy intake (EI) at 9 years was not related to BMI in subsequent years. Our study suggests that messages and interventions directed at obesity prevention could take advantage of sex-specific designs and' eventually' genetic information.
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Richards JS, Arias Vásquez A, von Rhein D, van der Meer D, Franke B, Hoekstra PJ, Heslenfeld DJ, Oosterlaan J, Faraone SV, Buitelaar JK, Hartman CA. Adolescent behavioral and neural reward sensitivity: a test of the differential susceptibility theory. Transl Psychiatry 2016; 6:e771. [PMID: 27045841 PMCID: PMC4872395 DOI: 10.1038/tp.2016.37] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Revised: 02/09/2016] [Accepted: 02/11/2016] [Indexed: 12/27/2022] Open
Abstract
Little is known about the causes of individual differences in reward sensitivity. We investigated gene-environment interactions (GxE) on behavioral and neural measures of reward sensitivity, in light of the differential susceptibility theory. This theory states that individuals carrying plasticity gene variants will be more disadvantaged in negative, but more advantaged in positive environments. Reward responses were assessed during a monetary incentive delay task in 178 participants with and 265 without attention-deficit/hyperactivity disorder (ADHD), from N=261 families. We examined interactions between variants in candidate plasticity genes (DAT1, 5-HTT and DRD4) and social environments (maternal expressed emotion and peer affiliation). HTTLPR short allele carriers showed the least reward speeding when exposed to high positive peer affiliation, but the most when faced with low positive peer affiliation or low maternal warmth. DAT1 10-repeat homozygotes displayed similar GxE patterns toward maternal warmth on general task performance. At the neural level, DRD4 7-repeat carriers showed the least striatal activation during reward anticipation when exposed to high maternal warmth, but the most when exposed to low warmth. Findings were independent of ADHD severity. Our results partially confirm the differential susceptibility theory and indicate the importance of positive social environments in reward sensitivity and general task performance for persons with specific genotypes.
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Affiliation(s)
- J S Richards
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands,Karakter Child and Adolescent Psychiatry University Centre, Nijmegen, The Netherlands,Karakter Child and Adolescent Psychiatry University Centre, Reinier Postlaan 12, 6525 GC Nijmegen, The Netherlands. E-mail:
| | - A Arias Vásquez
- Department of Human Genetics, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands,Department of Psychiatry, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - D von Rhein
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - D van der Meer
- Department of Psychiatry, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - B Franke
- Department of Human Genetics, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands,Department of Psychiatry, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - P J Hoekstra
- Department of Psychiatry, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - D J Heslenfeld
- Department of Clinical Neuropsychology, VU University Amsterdam, Amsterdam, The Netherlands
| | - J Oosterlaan
- Department of Clinical Neuropsychology, VU University Amsterdam, Amsterdam, The Netherlands
| | - S V Faraone
- Departments of Psychiatry and of Neuroscience and Physiology, SUNY Upstate Medical University, Syracuse, NY, USA
| | - J K Buitelaar
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands,Karakter Child and Adolescent Psychiatry University Centre, Nijmegen, The Netherlands
| | - C A Hartman
- Department of Psychiatry, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
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Fontaine NMG, Hanscombe KB, Berg MT, McCrory EJ, Viding E. Trajectories of Callous-Unemotional Traits in Childhood Predict Different Forms of Peer Victimization in Adolescence. JOURNAL OF CLINICAL CHILD AND ADOLESCENT PSYCHOLOGY 2016; 47:458-466. [PMID: 26890671 DOI: 10.1080/15374416.2015.1105139] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Callous-unemotional (CU) traits (e.g., lack of empathy and guilt) differentiate a group of children at particularly high risk for engaging in aggressive behavior, notably bullying. However, little is known about whether youths with CU traits are at risk for being victimized by their peers. We examined the associations between trajectories of CU traits in childhood (between 7 and 12 years old) and peer victimization in adolescence (14 years old). The participants were drawn from the Twins Early Development Study, a longitudinal population-based study of twins born in England and in Wales. The trajectories of CU traits (i.e., stable high, increasing, decreasing and stable low) were identified through general growth mixture modeling. Four forms of peer victimization were considered: physical victimization, verbal victimization, social manipulation, and attacks on property. We found that youths with stable high levels, increasing levels, and decreasing levels of CU traits in childhood had higher levels of physical victimization in adolescence, not explained by other predictors at age 7 (e.g., conduct problems). Youths with increasing levels of CU traits, compared with the ones with stable low levels, also had higher levels of verbal victimization, social manipulation, and attacks on property. Our findings highlight the importance of distinct trajectories of CU traits in accounting for the experience of different forms of peer victimization. Youths with CU traits may benefit from bullying prevention programs, as they are likely to be the targets of peer victimization.
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Affiliation(s)
| | - Ken B Hanscombe
- b Department of Medical and Molecular Genetics , King's College London
| | - Mark T Berg
- c Department of Sociology , University of Iowa
| | - Eamon J McCrory
- d Division of Psychology and Language Sciences, University College London
| | - Essi Viding
- d Division of Psychology and Language Sciences, University College London.,e Institute of Psychiatry, Psychology & Neuroscience, King's College London
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10
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Vitaro F, Brendgen M, Girard A, Dionne G, Tremblay RE, Boivin M. Links between friends’ physical aggression and adolescents’ physical aggression. INTERNATIONAL JOURNAL OF BEHAVIORAL DEVELOPMENT 2016. [DOI: 10.1177/0165025415618277] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Exposure to deviant friends has been found to be a powerful source of influence on children’s and adolescents’ aggressive behavior. However, the contribution of deviant friends may have been overestimated because of a possible non-accounted gene-environment correlation (rGE). In this study, we used a cross-lagged design to test whether friends’ physical aggression at age 10 predicts an increase in participants’ physical aggression from age 10 to age 13 years. Participants were 201 pairs of monozygotic twins who are part of the Quebec Longitudinal Twin Study. We performed two sets of analyses. In the first set of analyses, using twins as singletons, we found that teacher-rated friends’ physical aggression predicted an increase in each twin’s self-reported physical aggression from age 10 to age 13, above and beyond auto-regressive and concurrent links. Second, we used within-pair differences in regard to friends’ physical aggression to predict an increase in within-pair differences in physical aggression, thus accounting for family-wide influences, including a likely rGE at age 10. No significant association was found, however. These results suggest that part of the influence attributed to friends in past studies may have been due to common underlying genetic effects on both physical aggression and association with physically aggressive friends.
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11
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Lacourse E, Boivin M, Brendgen M, Petitclerc A, Girard A, Vitaro F, Paquin S, Ouellet-Morin I, Dionne G, Tremblay RE. A longitudinal twin study of physical aggression during early childhood: evidence for a developmentally dynamic genome. Psychol Med 2014; 44:2617-2627. [PMID: 24443874 DOI: 10.1017/s0033291713003218] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND Physical aggression (PA) tends to have its onset in infancy and to increase rapidly in frequency. Very little is known about the genetic and environmental etiology of PA development during early childhood. We investigated the temporal pattern of genetic and environmental etiology of PA during this crucial developmental period. METHOD Participants were 667 twin pairs, including 254 monozygotic and 413 dizygotic pairs, from the ongoing longitudinal Quebec Newborn Twin Study. Maternal reports of PA were obtained from three waves of data at 20, 32 and 50 months. These reports were analysed using a biometric Cholesky decomposition and linear latent growth curve model. RESULTS The best-fitting Cholesky model revealed developmentally dynamic effects, mostly genetic attenuation and innovation. The contribution of genetic factors at 20 months substantially decreased over time, while new genetic effects appeared later on. The linear latent growth curve model revealed a significant moderate increase in PA from 20 to 50 months. Two separate sets of uncorrelated genetic factors accounted for the variation in initial level and growth rate. Non-shared and shared environments had no effect on the stability, initial status and growth rate in PA. CONCLUSIONS Genetic factors underlie PA frequency and stability during early childhood; they are also responsible for initial status and growth rate in PA. The contribution of shared environment is modest, and perhaps limited, as it appears only at 50 months. Future research should investigate the complex nature of these dynamic genetic factors through genetic-environment correlation (r GE) and interaction (G×E) analyses.
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Affiliation(s)
- E Lacourse
- Research Unit on Children's Psychosocial Adjustment, Ste-Justine Hospital Research Center,University of Montreal,QC,Canada
| | - M Boivin
- Research Unit on Children's Psychosocial Adjustment, Ste-Justine Hospital Research Center,University of Montreal,QC,Canada
| | - M Brendgen
- Research Unit on Children's Psychosocial Adjustment, Ste-Justine Hospital Research Center,University of Montreal,QC,Canada
| | - A Petitclerc
- National Center for Children and Families, Teachers College,Columbia University,NY,USA
| | - A Girard
- Research Unit on Children's Psychosocial Adjustment, Ste-Justine Hospital Research Center,University of Montreal,QC,Canada
| | - F Vitaro
- Research Unit on Children's Psychosocial Adjustment, Ste-Justine Hospital Research Center,University of Montreal,QC,Canada
| | - S Paquin
- Research Unit on Children's Psychosocial Adjustment, Ste-Justine Hospital Research Center,University of Montreal,QC,Canada
| | - I Ouellet-Morin
- Research Unit on Children's Psychosocial Adjustment, Ste-Justine Hospital Research Center,University of Montreal,QC,Canada
| | - G Dionne
- Research Unit on Children's Psychosocial Adjustment, Ste-Justine Hospital Research Center,University of Montreal,QC,Canada
| | - R E Tremblay
- Research Unit on Children's Psychosocial Adjustment, Ste-Justine Hospital Research Center,University of Montreal,QC,Canada
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12
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Cingolani P, Cao X, Khetani RS, Chen CC, Coon M, Sammak A, Bollig-Fischer A, Land S, Huang Y, Hudson ME, Garfinkel MD, Zhong S, Robinson GE, Ruden DM. Intronic non-CG DNA hydroxymethylation and alternative mRNA splicing in honey bees. BMC Genomics 2013; 14:666. [PMID: 24079845 PMCID: PMC3850688 DOI: 10.1186/1471-2164-14-666] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2013] [Accepted: 09/22/2013] [Indexed: 11/20/2022] Open
Abstract
Background Previous whole-genome shotgun bisulfite sequencing experiments showed that DNA cytosine methylation in the honey bee (Apis mellifera) is almost exclusively at CG dinucleotides in exons. However, the most commonly used method, bisulfite sequencing, cannot distinguish 5-methylcytosine from 5-hydroxymethylcytosine, an oxidized form of 5-methylcytosine that is catalyzed by the TET family of dioxygenases. Furthermore, some analysis software programs under-represent non-CG DNA methylation and hydryoxymethylation for a variety of reasons. Therefore, we used an unbiased analysis of bisulfite sequencing data combined with molecular and bioinformatics approaches to distinguish 5-methylcytosine from 5-hydroxymethylcytosine. By doing this, we have performed the first whole genome analyses of DNA modifications at non-CG sites in honey bees and correlated the effects of these DNA modifications on gene expression and alternative mRNA splicing. Results We confirmed, using unbiased analyses of whole-genome shotgun bisulfite sequencing (BS-seq) data, with both new data and published data, the previous finding that CG DNA methylation is enriched in exons in honey bees. However, we also found evidence that cytosine methylation and hydroxymethylation at non-CG sites is enriched in introns. Using antibodies against 5-hydroxmethylcytosine, we confirmed that DNA hydroxymethylation at non-CG sites is enriched in introns. Additionally, using a new technique, Pvu-seq (which employs the enzyme PvuRts1l to digest DNA at 5-hydroxymethylcytosine sites followed by next-generation DNA sequencing), we further confirmed that hydroxymethylation is enriched in introns at non-CG sites. Conclusions Cytosine hydroxymethylation at non-CG sites might have more functional significance than previously appreciated, and in honey bees these modifications might be related to the regulation of alternative mRNA splicing by defining the locations of the introns.
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Affiliation(s)
- Pablo Cingolani
- Department of Obstetrics and Gynecology, Wayne State University, Detroit, MI 48201, USA.
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A longitudinal investigation of the associations among parenting, deviant peer affiliation, and externalizing behaviors: a monozygotic twin differences design. Twin Res Hum Genet 2013; 16:698-706. [PMID: 23659853 DOI: 10.1017/thg.2013.24] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Non-shared parenting and deviant peer affiliation are linked to differences in externalizing behaviors between twins. However, few studies have examined these two non-shared environments simultaneously. The present study examined the transactional roles of differential parenting (i.e., warmth and hostility) and deviant peer affiliation on monozygotic (MZ) twin differences in externalizing behaviors using a two-wave longitudinal study of twins and their parents. The sample consisted of 520 pairs of MZ twins (46.5% males, 53.5% females), with a mean age of 13.86 years (SD = 2.10) at the T1 assessment, residing in Beijing, China. The association between non-shared hostility in parenting and adolescent externalizing behaviors was mainly explained by a child-driven effect whereby the twin with a higher level of externalizing behaviors than his or her co-twin was more likely to receive more hostility from the parents. Similarly, the relationship between deviant peer affiliation and adolescent externalizing behaviors supported the selection effect whereby the twin with a higher level of externalizing behaviors than his or her co-twin was more likely to affiliate with deviant peers. The theoretical and practical implications of these findings are discussed.
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14
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Barker ED, Salekin RT. Irritable oppositional defiance and callous unemotional traits: is the association partially explained by peer victimization? J Child Psychol Psychiatry 2012; 53:1167-75. [PMID: 22783837 PMCID: PMC3619049 DOI: 10.1111/j.1469-7610.2012.02579.x] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Irritability is a subdimension of ODD, which predicts mainly to internalizing disorders, and to a lesser extent, conduct problems and callous-unemotional traits. Given that youth with similar dispositions as the irritable types - as well as youth high in callous-unemotional (CU) traits - have both been reported to experience high levels of victimization by peers, the authors examined an extension of the failure model (Patterson & Capaldi, 1990): that irritability increases peer victimization, which, in turn, predicts both CU and internalizing symptoms. SAMPLE Using data from 5,923 mother-child pairs participating in The Avon Longitudinal Study of Parents and Children, the authors tested the outcomes of internalizing difficulties and callous-unemotional traits (based on mother report at age 13) via the predictors (at ages 8 and 10) of irritability (mother report) and the experience of peer victimization (youth report). RESULTS Irritability and peer victimization (age 10) directly predicted both CU and internalizing difficulties (age 13). Contrary to strict interpretation of the failure model, the significant indirect pathway described peer victimization (age 8) as increasing irritability (age 10), which, in turn, increased both CU and internalizing difficulties (age 13). CONCLUSION Results suggest that - for youth with irritable dispositions - co-occurring CU and internalizing difficulties can be acquired via adverse experiences in the social environment.
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Affiliation(s)
- Edward D Barker
- Developmental Psychopathology Laboratory, Department of Psychological Sciences, Birkbeck, University of London, London, UK.
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