Search

The development of biological markers of aging has primarily focused on adult samples. Epigenetic clocks are a promising tool for measuring biological age that show impressive accuracy across most tissues and age ranges. In adults, deviations from the DNA methylation (DNAm) age prediction are correlated with several age-related phenotypes, such as mortality and frailty. In children, however, fewer such associations have been made, possibly because DNAm changes are more dynamic in pediatric populations as compared to adults. To address this gap, we aimed to develop a highly accurate, noninvasive, biological measure of age specific to pediatric samples using buccal epithelial cell DNAm. We gathered 1,721 genome-wide DNAm profiles from 11 different cohorts of typically developing individuals aged 0 to 20 y old. Elastic net penalized regression was used to select 94 CpG sites from a training dataset (n = 1,032), with performance assessed in a separate test dataset (n = 689). DNAm at these 94 CpG sites was highly predictive of age in the test cohort (median absolute error = 0.35 y). The Pediatric-Buccal-Epigenetic (PedBE) clock was characterized in additional cohorts, showcasing the accuracy in longitudinal data, the performance in nonbuccal tissues and adult age ranges, and the association with obstetric outcomes. The PedBE tool for measuring biological age in children might help in understanding the environmental and contextual factors that shape the DNA methylome during child development, and how it, in turn, might relate to child health and disease.

The early caregiving environment can have lasting effects on child mental health. Animal models suggest that glucocorticoid receptor gene (NR3C1) DNA methylation plays a mediating role in linking more responsive caregiving to improved behavioral outcomes by its impact on the stress regulatory system. In this longitudinal study, we examined whether children's NR3C1 methylation levels mediate an effect of maternal sensitivity in infancy on levels of child internalizing and externalizing behavior in a community sample. Maternal sensitivity of 145 mothers was rated at infant age 5 weeks, 12 months, and 30 months by observing mother–infant interactions. Buccal DNA methylation was assessed in the same children at age 6 years and maternal-reported internalizing and externalizing behavior was assessed at age 6 and 10 years. Higher sensitivity at age 5 weeks significantly predicted lower DNA methylation levels at two NR3C1 CpG loci, although methylation levels at these loci did not mediate an effect of maternal sensitivity on levels of child internalizing and externalizing behavior. Overall, the study provides evidence that maternal sensitivity in early infancy is associated with DNA methylation levels at loci involved in stress regulation, but the significance of this finding for child mental health remains unclear. [ABSTRACT FROM AUTHOR]

Background: Parent-adolescent interactions, particularly parental criticism and praise, have previously been identified as factors relevant to self-concept development and, when negative, to adolescent depression. Yet, whether adolescents with depression show aberrant emotional and neural reactivity to parental criticism and praise is understudied. Methods: Adolescents with depression (n = 20) and healthy controls (n = 59) received feedback supposedly provided by their mother or father in the form of negative ('untrustworthy'), neutral ('chaotic'), and positive ('respectful') personality evaluations while in an MRI-scanner. After each feedback word, adolescents reported their mood. Beforehand, adolescents had rated whether these personality evaluations matched their self-views. Results: In both groups, mood decreased after criticism and increased after praise. Adolescents with depression reported blunted mood responses after praise, whereas there were no mood differences after criticism. Neuroimaging analyses revealed that adolescents with depression (v. healthy controls) exhibited increased activity in response to criticism in the subgenual anterior cingulate cortex, temporal pole, hippocampus, and parahippocampal gyrus. Praise consistent with adolescents' self-views improved mood independent of depression status, while criticism matching self-views resulted in smaller mood increases in adolescents with depression (v. healthy controls). Exploratory analyses indicated that adolescents with depression recalled criticism (v. praise) more. Conclusions: Adolescents with depression might be especially attentive to parental criticism, as indexed by increased sgACC and hippocampus activity, and memorize this criticism more. Together with lower positive impact of praise, these findings suggest that cognitive biases in adolescent depression may affect how parental feedback is processed, and may be fed into their self-views. [ABSTRACT FROM AUTHOR]

Parent-child agreement on child maltreatment was examined in a multigenerational study. Questionnaires on perpetrated and experienced child maltreatment were completed by 138 parent-child pairs. Multi-level analyses were conducted to explore whether parents and children agreed about levels of parent-to-child maltreatment (convergence), and to examine whether parents and children reported equal levels of child maltreatment (absolute differences). Direct and moderating effects of age and gender were examined as potential factors explaining differences between parent and child report. The associations between parent- and child-reported maltreatment were significant for all subtypes, but the strength of the associations was low to moderate. Moreover, children reported more parent-to-child neglect than parents did. Older participants reported more experienced maltreatment than younger participants, without evidence for differences in actual exposure. These findings support the value of multi-informant assessment of child maltreatment to improve accuracy, but also reveal the divergent perspectives of parents and children on child maltreatment., Author(s): Laura H.C.G. Compier-de Block [sup.1] , Lenneke R.A. Alink [sup.1] [sup.2] , Mariëlle Linting [sup.1] , Lisa J.M. van den Berg [sup.3] , Bernet M. Elzinga [sup.3] , Alexandra [...]

One of the proposed mechanisms linking childhood stressor exposure to negative mental and physical health outcomes in later life is cellular aging. In this prospective, longitudinal, and pre‐registered study, we examined the association between a cumulative pattern of childhood risk exposure from age 6 to age 10 (i.e., poor maternal mental health, parental relationship problems, family/friend death, bullying victimization, poor quality friendships) and change in two biomarkers of cellular aging (i.e., telomere length, epigenetic age) from age 6 to age 10 in a Dutch low‐risk community sample (n = 193). We further examined the moderating effect of cortisol reactivity at age 6. Ordinary Least Squares regression analyses revealed no significant main effects of childhood risk exposure on change in cellular aging, nor a moderation effect of child cortisol reactivity. Secondary findings showed a positive correlation between telomere length and cortisol reactivity at age 6, warranting further investigation. More research in similar communities is needed before drawing strong conclusions based on the null results. Previous research in high‐adversity risk samples suggests an association between childhood stressor exposure and accelerated cellular aging. Our null‐findings from a longitudinal community sample indicate that such link between childhood stressor exposure and accelerated cellular aging might not be present in low‐adversity risk samples. Furthermore, our study uncovers an association between telomere length and cortisol reactivity and supports the notions of a lack of association between different biomarkers of cellular aging and a period of telomere length stability in childhood. [ABSTRACT FROM AUTHOR]