3 recherche sur le mot-clé 'DRD4'

A DRD4 gene by maternal sensitivity interaction predicts risk for overweight or obesity in two independent cohorts of preschool children / Robert D. LEVITAN in Journal of Child Psychology and Psychiatry, 58-2 (February 2017)  

Public ISBD [article]  inJournal of Child Psychology and Psychiatry > 58-2 (February 2017) . - p.180-188 Titre : A DRD4 gene by maternal sensitivity interaction predicts risk for overweight or obesity in two independent cohorts of preschool children Type de document : Texte imprimé et/ou numérique Auteurs : Robert D. LEVITAN, Auteur ; Pauline JANSEN, Auteur ; Barbara WENDLAND, Auteur ; Henning TIEMEIER, Auteur ; Vincent W.V. JADDOE, Auteur ; Patricia P. SILVEIRA, Auteur ; James L. KENNEDY, Auteur ; Leslie ATKINSON, Auteur ; Alison FLEMING, Auteur ; Marla SOKOLOWSKI, Auteur ; Helene GAUDREAU, Auteur ; Meir STEINER, Auteur ; Laurette DUBE, Auteur ; Jill HAMILTON, Auteur ; Ellen MOSS, Auteur ; Ashley WAZANA, Auteur ; Michael MEANEY, Auteur Année de publication : 2017 Article en page(s) : p.180-188 Langues : Anglais (eng) Mots-clés : Maternal sensitivity  DRD4  obesity  sex differences Index. décimale : PER Périodiques Résumé : Background Recent evidence suggests that early exposure to low maternal sensitivity is a risk factor for obesity in children and adolescents. A separate line of study shows that the seven-repeat (7R) allele of the dopamine-4 receptor gene (DRD4) increases susceptibility to environmental factors including maternal sensitivity. The current study integrates these lines of work by examining whether preschoolers carrying the 7R allele are more vulnerable to low maternal sensitivity as it relates to overweight/obesity risk. Method The Maternal Adversity Vulnerability and Neurodevelopment (MAVAN) project in Canada was used as the discovery cohort (N = 203), while the Generation R study in the Netherlands was used as a replication sample (N = 270). Regression models to predict both continuous BMI z-scores and membership in any higher BMI category based on established World Health Organization (WHO) cutoffs for 48 months of age were completed. Results In both cohorts, there was a significant maternal sensitivity by DRD4 by sex interaction predicting higher body mass indices and/or obesity risk. As hypothesized, post hoc testing revealed an inverse relationship between maternal sensitivity and body mass indices in 7R allele carriers relative to noncarriers. This finding was strongest in girls in the Canadian cohort and in boys in the Dutch cohort. Conclusions Many children who carry the 7R allele of DRD4 appear to be more influenced by maternal sensitivity as it relates to overweight/obesity risk, consistent with a plasticity effect. Given the relatively small sample sizes available for these analyses, further replications will be needed to confirm and extend these results. En ligne : http://dx.doi.org/10.1111/jcpp.12646 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=299 [article] A DRD4 gene by maternal sensitivity interaction predicts risk for overweight or obesity in two independent cohorts of preschool children [Texte imprimé et/ou numérique] / Robert D. LEVITAN, Auteur ; Pauline JANSEN, Auteur ; Barbara WENDLAND, Auteur ; Henning TIEMEIER, Auteur ; Vincent W.V. JADDOE, Auteur ; Patricia P. SILVEIRA, Auteur ; James L. KENNEDY, Auteur ; Leslie ATKINSON, Auteur ; Alison FLEMING, Auteur ; Marla SOKOLOWSKI, Auteur ; Helene GAUDREAU, Auteur ; Meir STEINER, Auteur ; Laurette DUBE, Auteur ; Jill HAMILTON, Auteur ; Ellen MOSS, Auteur ; Ashley WAZANA, Auteur ; Michael MEANEY, Auteur . - 2017 . - p.180-188. Langues : Anglais (eng) in Journal of Child Psychology and Psychiatry > 58-2 (February 2017) . - p.180-188 Mots-clés : Maternal sensitivity  DRD4  obesity  sex differences Index. décimale : PER Périodiques Résumé : Background Recent evidence suggests that early exposure to low maternal sensitivity is a risk factor for obesity in children and adolescents. A separate line of study shows that the seven-repeat (7R) allele of the dopamine-4 receptor gene (DRD4) increases susceptibility to environmental factors including maternal sensitivity. The current study integrates these lines of work by examining whether preschoolers carrying the 7R allele are more vulnerable to low maternal sensitivity as it relates to overweight/obesity risk. Method The Maternal Adversity Vulnerability and Neurodevelopment (MAVAN) project in Canada was used as the discovery cohort (N = 203), while the Generation R study in the Netherlands was used as a replication sample (N = 270). Regression models to predict both continuous BMI z-scores and membership in any higher BMI category based on established World Health Organization (WHO) cutoffs for 48 months of age were completed. Results In both cohorts, there was a significant maternal sensitivity by DRD4 by sex interaction predicting higher body mass indices and/or obesity risk. As hypothesized, post hoc testing revealed an inverse relationship between maternal sensitivity and body mass indices in 7R allele carriers relative to noncarriers. This finding was strongest in girls in the Canadian cohort and in boys in the Dutch cohort. Conclusions Many children who carry the 7R allele of DRD4 appear to be more influenced by maternal sensitivity as it relates to overweight/obesity risk, consistent with a plasticity effect. Given the relatively small sample sizes available for these analyses, further replications will be needed to confirm and extend these results. En ligne : http://dx.doi.org/10.1111/jcpp.12646 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=299

Mothers' prenatal stress and their children's antisocial outcomes – a moderating role for the Dopamine D4 Receptor (DRD4) gene / Katrin ZOHSEL in Journal of Child Psychology and Psychiatry, 55-1 (January 2014)  

Public ISBD [article]  inJournal of Child Psychology and Psychiatry > 55-1 (January 2014) . - p.69-76 Titre : Mothers' prenatal stress and their children's antisocial outcomes – a moderating role for the Dopamine D4 Receptor (DRD4) gene Type de document : Texte imprimé et/ou numérique Auteurs : Katrin ZOHSEL, Auteur ; Arlette F. BUCHMANN, Auteur ; Dorothea BLOMEYER, Auteur ; Erika HOHM, Auteur ; Martin H. SCHMIDT, Auteur ; Günter ESSER, Auteur ; Daniel BRANDEIS, Auteur ; Tobias BANASCHEWSKI, Auteur ; Manfred LAUCHT, Auteur Article en page(s) : p.69-76 Langues : Anglais (eng) Mots-clés : Prenatal stress  antisocial  conduct disorder  DRD4  gene–environment interaction Index. décimale : PER Périodiques Résumé : Background Maternal distress during pregnancy has been linked to aggressive behavior in offspring. This effect has been interpreted in terms of ‘fetal programming’. The 7-repeat (7r) allele of a VNTR polymorphism in exon III of the human dopamine receptor D4 (DRD4) has consistently been associated with externalizing behavior problems, especially in the presence of adverse environmental factors. So far, it is not known whether the DRD4 genotype moderates the effect of prenatal maternal stress on the development of childhood antisocial behavior. Methods As part of an ongoing epidemiological cohort study, prenatal maternal stress was assessed using self-report 3 months following child birth. When children were 8, 11, and 15 years old, mothers rated their children's externalizing behavior, and diagnoses of conduct disorder and/or oppositional defiant disorder (CD/ODD) according to DSM-IV were obtained. In a sample of N = 308 participants, the effects of the DRD4 genotype, prenatal maternal stress, and the interaction thereof on antisocial outcome were tested. Results Under conditions of elevated prenatal maternal stress, children carrying one or two DRD4 7r alleles were at increased risk of a diagnosis of CD/ODD. Moreover, homozygous carriers of the DRD4 7r allele displayed more externalizing behavior following exposure to higher levels of prenatal maternal stress, while homozygous carriers of the DRD4 4r allele turned out to be insensitive to the effects of prenatal stress. Conclusions This study is the first to report a gene–environment interaction related to DRD4 and prenatal maternal stress using data from a prospective study, which extends earlier findings on the impact of prenatal maternal stress with respect to childhood antisocial behavior. En ligne : http://dx.doi.org/10.1111/jcpp.12138 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=220 [article] Mothers' prenatal stress and their children's antisocial outcomes – a moderating role for the Dopamine D4 Receptor (DRD4) gene [Texte imprimé et/ou numérique] / Katrin ZOHSEL, Auteur ; Arlette F. BUCHMANN, Auteur ; Dorothea BLOMEYER, Auteur ; Erika HOHM, Auteur ; Martin H. SCHMIDT, Auteur ; Günter ESSER, Auteur ; Daniel BRANDEIS, Auteur ; Tobias BANASCHEWSKI, Auteur ; Manfred LAUCHT, Auteur . - p.69-76. Langues : Anglais (eng) in Journal of Child Psychology and Psychiatry > 55-1 (January 2014) . - p.69-76 Mots-clés : Prenatal stress  antisocial  conduct disorder  DRD4  gene–environment interaction Index. décimale : PER Périodiques Résumé : Background Maternal distress during pregnancy has been linked to aggressive behavior in offspring. This effect has been interpreted in terms of ‘fetal programming’. The 7-repeat (7r) allele of a VNTR polymorphism in exon III of the human dopamine receptor D4 (DRD4) has consistently been associated with externalizing behavior problems, especially in the presence of adverse environmental factors. So far, it is not known whether the DRD4 genotype moderates the effect of prenatal maternal stress on the development of childhood antisocial behavior. Methods As part of an ongoing epidemiological cohort study, prenatal maternal stress was assessed using self-report 3 months following child birth. When children were 8, 11, and 15 years old, mothers rated their children's externalizing behavior, and diagnoses of conduct disorder and/or oppositional defiant disorder (CD/ODD) according to DSM-IV were obtained. In a sample of N = 308 participants, the effects of the DRD4 genotype, prenatal maternal stress, and the interaction thereof on antisocial outcome were tested. Results Under conditions of elevated prenatal maternal stress, children carrying one or two DRD4 7r alleles were at increased risk of a diagnosis of CD/ODD. Moreover, homozygous carriers of the DRD4 7r allele displayed more externalizing behavior following exposure to higher levels of prenatal maternal stress, while homozygous carriers of the DRD4 4r allele turned out to be insensitive to the effects of prenatal stress. Conclusions This study is the first to report a gene–environment interaction related to DRD4 and prenatal maternal stress using data from a prospective study, which extends earlier findings on the impact of prenatal maternal stress with respect to childhood antisocial behavior. En ligne : http://dx.doi.org/10.1111/jcpp.12138 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=220

Confirmatory and competitive evaluation of alternative gene-environment interaction hypotheses / Jay BELSKY in Journal of Child Psychology and Psychiatry, 54-10 (October 2013)  

Public ISBD [article]  inJournal of Child Psychology and Psychiatry > 54-10 (October 2013) . - p.1135-1143 Titre : Confirmatory and competitive evaluation of alternative gene-environment interaction hypotheses Type de document : Texte imprimé et/ou numérique Auteurs : Jay BELSKY, Auteur ; Michael PLUESS, Auteur ; Keith F. WIDAMAN, Auteur Article en page(s) : p.1135-1143 Langues : Anglais (eng) Mots-clés : Gene-environment interaction  diathesis-stress  differential susceptibility  child care  DRD4 Index. décimale : PER Périodiques Résumé : Background Most gene-environment interaction (GXE) research, though based on clear, vulnerability-oriented hypotheses, is carried out using exploratory rather than hypothesis-informed statistical tests, limiting power and making formal evaluation of competing GXE propositions difficult. Method We present and illustrate a new regression technique which affords direct testing of theory-derived predictions, as well as competitive evaluation of alternative diathesis-stress and differential-susceptibility propositions, using data on the moderating effect of DRD4 with regard to the effect of childcare quality on children's social functioning. Results Results show that (a) the new approach detects interactions that the traditional one does not; (b) the discerned GXE fit the differential-susceptibility model better than the diathesis-stress one; and (c) a strong rather than weak version of differential susceptibility is empirically supported. Conclusion The new method better fits the theoretical ‘glove’ to the empirical ‘hand,’ raising the prospect that some failures to replicate GXE results may derive from standard statistical approaches being less than ideal. En ligne : http://dx.doi.org/10.1111/jcpp.12075 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=212 [article] Confirmatory and competitive evaluation of alternative gene-environment interaction hypotheses [Texte imprimé et/ou numérique] / Jay BELSKY, Auteur ; Michael PLUESS, Auteur ; Keith F. WIDAMAN, Auteur . - p.1135-1143. Langues : Anglais (eng) in Journal of Child Psychology and Psychiatry > 54-10 (October 2013) . - p.1135-1143 Mots-clés : Gene-environment interaction  diathesis-stress  differential susceptibility  child care  DRD4 Index. décimale : PER Périodiques Résumé : Background Most gene-environment interaction (GXE) research, though based on clear, vulnerability-oriented hypotheses, is carried out using exploratory rather than hypothesis-informed statistical tests, limiting power and making formal evaluation of competing GXE propositions difficult. Method We present and illustrate a new regression technique which affords direct testing of theory-derived predictions, as well as competitive evaluation of alternative diathesis-stress and differential-susceptibility propositions, using data on the moderating effect of DRD4 with regard to the effect of childcare quality on children's social functioning. Results Results show that (a) the new approach detects interactions that the traditional one does not; (b) the discerned GXE fit the differential-susceptibility model better than the diathesis-stress one; and (c) a strong rather than weak version of differential susceptibility is empirically supported. Conclusion The new method better fits the theoretical ‘glove’ to the empirical ‘hand,’ raising the prospect that some failures to replicate GXE results may derive from standard statistical approaches being less than ideal. En ligne : http://dx.doi.org/10.1111/jcpp.12075 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=212