Shaping long-term primate development: Telomere length trajectory as an indicator of early maternal maltreatment and predictor of future physiologic regulation / Stacy S. DRURY in Development and Psychopathology, 29-5 (December 2017)  

Public ISBD [article]  inDevelopment and Psychopathology > 29-5 (December 2017) . - p.1539-1551 Titre : Shaping long-term primate development: Telomere length trajectory as an indicator of early maternal maltreatment and predictor of future physiologic regulation Type de document : Texte imprimé et/ou numérique Auteurs : Stacy S. DRURY, Auteur ; Brittany R. HOWELL, Auteur ; Christopher JONES, Auteur ; Kyle ESTEVES, Auteur ; Elyse MORIN, Auteur ; Reid SCHLESINGER, Auteur ; Jerrold S. MEYER, Auteur ; Kate BAKER, Auteur ; Mar M. SANCHEZ, Auteur Article en page(s) : p.1539-1551 Langues : Anglais (eng) Index. décimale : PER Périodiques Résumé : The molecular, neurobiological, and physical health impacts of child maltreatment are well established, yet mechanistic pathways remain inadequately defined. Telomere length (TL) decline is an emerging molecular indicator of stress exposure with definitive links to negative health outcomes in maltreated individuals. The multiple confounders endemic to human maltreatment research impede the identification of causal pathways. This study leverages a unique randomized, cross-foster, study design in a naturalistic translational nonhuman primate model of infant maltreatment. At birth, newborn macaques were randomly assigned to either a maltreating or a competent control mother, balancing for sex, biological mother parenting history, and social rank. Offspring TL was measured longitudinally across the first 6 months of life (infancy) from peripheral blood. Hair cortisol accumulation was also determined at 6, 12, and 18 months of age. TL decline was greater in animals randomized to maltreatment, but also interacted with biological mother group. Shorter TL at 6 months was associated with higher mean cortisol levels through 18 months (juvenile period) when controlling for relevant covariates. These results suggest that even under the equivalent social, nutritional, and environmental conditions feasible in naturalistic translational nonhuman primate models, early adverse caregiving results in lasting molecular scars that foreshadow elevated health risk and physiologic dysregulation. En ligne : http://dx.doi.org/10.1017/S0954579417001225 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=323 [article] Shaping long-term primate development: Telomere length trajectory as an indicator of early maternal maltreatment and predictor of future physiologic regulation [Texte imprimé et/ou numérique] / Stacy S. DRURY, Auteur ; Brittany R. HOWELL, Auteur ; Christopher JONES, Auteur ; Kyle ESTEVES, Auteur ; Elyse MORIN, Auteur ; Reid SCHLESINGER, Auteur ; Jerrold S. MEYER, Auteur ; Kate BAKER, Auteur ; Mar M. SANCHEZ, Auteur . - p.1539-1551. Langues : Anglais (eng) in Development and Psychopathology > 29-5 (December 2017) . - p.1539-1551 Index. décimale : PER Périodiques Résumé : The molecular, neurobiological, and physical health impacts of child maltreatment are well established, yet mechanistic pathways remain inadequately defined. Telomere length (TL) decline is an emerging molecular indicator of stress exposure with definitive links to negative health outcomes in maltreated individuals. The multiple confounders endemic to human maltreatment research impede the identification of causal pathways. This study leverages a unique randomized, cross-foster, study design in a naturalistic translational nonhuman primate model of infant maltreatment. At birth, newborn macaques were randomly assigned to either a maltreating or a competent control mother, balancing for sex, biological mother parenting history, and social rank. Offspring TL was measured longitudinally across the first 6 months of life (infancy) from peripheral blood. Hair cortisol accumulation was also determined at 6, 12, and 18 months of age. TL decline was greater in animals randomized to maltreatment, but also interacted with biological mother group. Shorter TL at 6 months was associated with higher mean cortisol levels through 18 months (juvenile period) when controlling for relevant covariates. These results suggest that even under the equivalent social, nutritional, and environmental conditions feasible in naturalistic translational nonhuman primate models, early adverse caregiving results in lasting molecular scars that foreshadow elevated health risk and physiologic dysregulation. En ligne : http://dx.doi.org/10.1017/S0954579417001225 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=323

Understanding behavioral effects of early life stress using the reactive scope and allostatic load models / Brittany R. HOWELL in Development and Psychopathology, 23-4 (November 2011)  

Public ISBD [article]  inDevelopment and Psychopathology > 23-4 (November 2011) . - p.1001-1016 Titre : Understanding behavioral effects of early life stress using the reactive scope and allostatic load models Type de document : Texte imprimé et/ou numérique Auteurs : Brittany R. HOWELL, Auteur ; Mar M. SANCHEZ, Auteur Année de publication : 2011 Article en page(s) : p.1001-1016 Langues : Anglais (eng) Index. décimale : PER Périodiques Résumé : The mechanisms through which early life stress leads to psychopathology are thought to involve allostatic load, the “wear and tear” an organism is subjected to as a consequence of sustained elevated levels of glucocorticoids caused by repeated/prolonged stress activations. The allostatic load model described this phenomenon, but has been criticized as inadequate to explain alterations associated with early adverse experience in some systems, including behavior, which cannot be entirely explained from an energy balance perspective. The reactive scope model has been more recently proposed and focuses less on energy balance and more on dynamic ranges of physiological and behavioral mediators. In this review we examine the mechanisms underlying the behavioral consequences of early life stress in the context of both these models. We focus on adverse experiences that involve mother–infant relationship disruption, and dissect those mechanisms involving maternal care as a regulator of development of neural circuits that control emotional and social behaviors in the offspring. We also discuss the evolutionary purpose of the plasticity in behavioral development, which has a clear adaptive value in a changing environment. En ligne : http://dx.doi.org/10.1017/S0954579411000460 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=146 [article] Understanding behavioral effects of early life stress using the reactive scope and allostatic load models [Texte imprimé et/ou numérique] / Brittany R. HOWELL, Auteur ; Mar M. SANCHEZ, Auteur . - 2011 . - p.1001-1016. Langues : Anglais (eng) in Development and Psychopathology > 23-4 (November 2011) . - p.1001-1016 Index. décimale : PER Périodiques Résumé : The mechanisms through which early life stress leads to psychopathology are thought to involve allostatic load, the “wear and tear” an organism is subjected to as a consequence of sustained elevated levels of glucocorticoids caused by repeated/prolonged stress activations. The allostatic load model described this phenomenon, but has been criticized as inadequate to explain alterations associated with early adverse experience in some systems, including behavior, which cannot be entirely explained from an energy balance perspective. The reactive scope model has been more recently proposed and focuses less on energy balance and more on dynamic ranges of physiological and behavioral mediators. In this review we examine the mechanisms underlying the behavioral consequences of early life stress in the context of both these models. We focus on adverse experiences that involve mother–infant relationship disruption, and dissect those mechanisms involving maternal care as a regulator of development of neural circuits that control emotional and social behaviors in the offspring. We also discuss the evolutionary purpose of the plasticity in behavioral development, which has a clear adaptive value in a changing environment. En ligne : http://dx.doi.org/10.1017/S0954579411000460 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=146

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