Inflammation and minority stress: A moderated mediation model of childhood adversity and mental health in young men who have sex with men

RATIONALE

Adverse childhood experiences (ACEs) are linked to later anxiety and depression, and inflammation has been implicated as a mediating mechanism. Black and Latinx men who have sex with men (MSM) face higher prevalences of ACEs, anxiety, and depression compared to White, heterosexual peers. Understanding the links between ACEs and mental health is crucial to addressing these disparities.

METHODS

This study used structural equation modeling to test moderated mediation models examining inflammation as a mediator of the relationship between ACEs and symptoms of anxiety/depression and minority stress as a moderator on the path between ACEs and inflammation. Data was from a community sample of Black and Latinx MSM (n = 246; mean age = 22.6).

RESULTS

ACEs were significantly associated with symptoms of anxiety (B = 0.414; p < 0.001) and depression (B = 0.346; p < 0.001), but inflammation did not show a significant mediating effect. Additionally, the interaction between ACEs and minority stress had no significant indirect effect on anxiety/depression.

CONCLUSIONS

These findings underscore the possibility that inflammation may not represent the global perturbations of stress processes after ACEs at younger ages, particularly among a relatively healthy sample of emerging adults.

Family Functioning and Pubertal Maturation in Hispanic/Latino Children from the HCHS/SOL Youth

Previous studies have examined the association between family dysfunction and pubertal timing in adolescent girls. However, the evidence is lacking on the role of family dysfunction during sensitive developmental periods in both boys and girls from racial and ethnic minority groups. This study aimed to determine the effect of family dysfunction on the timing of pubertal maturation among US Hispanic/Latino children and adolescents. Participants were 1466 youths (50% female; ages 8-16 years) from the Hispanic Community Children's Health Study/Study of Latino Youth (SOL Youth). Pubertal maturation was measured using self-administered Pubertal Development Scale (PDS) items for boys and girls. Family dysfunction included measures of single-parent family structure, unhealthy family functioning, low parental closeness, and neglectful parenting style. We used multivariable ordinal logistic and linear regression analyses to examine the associations between family dysfunction and pubertal maturation (individual and cumulative measures), with adjustment for childhood BMI and socioeconomic factors, design effects (strata and clustering), and sample weights. Multivariable models of individual PDS items showed that family dysfunction was negatively associated with growth in height (OR = 0.66, 95% CI: 0.44, 0.99) in girls; no associations were found in boys. In the assessment of cumulative PDS scores, family dysfunction was associated with a lower average pubertal maturation score (b = -0.63, 95% CI: -1.21, -0.05) in boys, while no associations were found in girls. Pubertal timing lies at the intersection of associations between childhood adversity and adult health and warrants further investigation to understand the factors affecting timing and differences across sex and sociocultural background.

Interpreting evidence on the association between multiple adverse childhood experiences and mental and physical health outcomes in adulthood: protocol for a systematic review assessing causality

INTRODUCTION

Research suggests that adverse childhood experiences can have a lasting influence on children's development that result in poorer health outcomes in adulthood. Like other exposure-outcome relationships, however, there is uncertainty about the extent to which the relationship between adverse childhood experiences and health is causal or attributable to other factors. The aim of this systematic review is to better understand the nature and extent of the evidence available to infer a causal relationship between adverse childhood experiences and health outcomes in adulthood.

METHODS AND ANALYSIS

A systematic review of evidence from cross-sectional and longitudinal studies will be conducted to examine the association between multiple adverse childhood experiences and mental and physical health outcomes in adulthood. A comprehensive search for articles will be conducted in four databases (Medline, CINAHL, PsycInfo and Web of Science) and Google Scholar. We will include studies published since 2014: (1) of adults aged 16 years or over with exposure to adverse childhood experiences before age 16 years from general population samples; (2) that report measures across multiple categories of childhood adversity, including both direct and indirect types and (3) report outcomes related to disease morbidity and mortality. Two reviewers will independently screen all titles and abstracts and full texts of potentially relevant studies. Included studies will be evaluated for risk of bias with the Risk Of Bias In Non-randomised Studies of Exposures tool. Data extraction will include extraction of study characteristics; measurement of adverse childhood experiences, outcome assessment and measurement of outcomes; details about confounding variables and contextual variables; methods of statistical analysis; and methods for assessing causal inference. We will carry out a meta-analysis and incorporate causal assessment with reference to the Bradford Hill criteria and the Grading of Recommendations Assessment, Development and Evaluation framework.

ETHICS AND DISSEMINATION

This study is a systematic review protocol collecting data from published literature and does not require approval from an institutional review board. The findings from this systematic review will be disseminated via a peer-reviewed journal publication, professional networks and social media.

PROSPERO REGISTRATION NUMBER

CRD42024554563.

Developmental Plasticity and the Evolutionary Rescue of a Colonizing Mite

Plasticity, especially in small newly founded populations, can expose genetic variation to selection during the evolutionary rescue of populations, allowing individuals to achieve a phenotype with which they can survive. However, developmental plasticity can also enable organisms to accommodate perturbations, generating new phenotypic variation. We explored whether, at the start of a colonization event, phenotype dynamics follow a "selective" process in which plasticity fuels evolutionary rescue or whether they are due to developmental plasticity in a "generative" process. We investigated this using the bulb mite Rhizoglyphus robini, which expresses a facultative, juvenile dispersal phenotype (deutonymph) under unfavorable conditions and shows alternative adult male phenotypes: competitive fighters or benign scramblers that are expressed to mitigate food stress and which have higher levels of genetic heterozygosity than fighters. Mimicking colonization dynamics, we founded small, medium and large populations from deutonymphs on low or high food to test if scramblers were expressed earliest postcolonization within (i) the smallest founder populations to alleviate inbreeding (selective hypothesis), or (ii) the largest founder populations as a direct consequence of food stress is highest due to higher food competition (generative hypothesis). In line with the generative hypothesis under both food environments, scramblers were expressed at the earliest in the largest founder populations, which also tended to show the lowest growth at the start of the experiment and had the lowest ultimate population size. Our findings highlight the necessity to seek explanations of how developmental pathways likely influence evolutionary rescue patterns, starting with how resource limitation (stress) shapes adaptive responses during colonization.

Adaptation and validation of the Chinese versions of the childhood perceived poverty and wealth questionnaire(C‑CPPWQ) and the childhood perceived unpredictability questionnaire (C‑CPUQ)

BACKGROUND

Childhood subjective socioeconomic status (operational definition of harshness) and unpredictability significantly influence life history strategies and subsequent psychological and behavioral patterns. Existing research on Chinese populations has been limited by inconsistent metrics and inadequate measurement items. This study aimed to adapt and validate the Chinese versions of the Childhood Perceived Poverty and Wealth Questionnaire (C-CPPWQ) and the Childhood Perceived Unpredictability Questionnaire (C-CPUQ), addressing cultural differences and expanding measurement subjects.

METHODS

We conducted Exploratory Factor Analysis (EFA) with 493 students and Confirmatory Factor Analysis (CFA) with 1217 students to validate the factor structures. Concurrent validity was assessed using correlations with life history strategies (Mini-K) and childhood trauma (CTQ-SF) and reliability were also evaluated.

RESULTS

The C-CPPWQ's two-factor model (perceived wealth and perceived poverty) demonstrated good fit (CFI = 0.95; TLI = 0.94; SRMR = 0.05; RMSEA = 0.08) and strong internal consistency (alpha = 0.90), with significant correlations with Mini-K (r = -0.28, p < 0.001) and childhood trauma (r = 0.29, p < 0.001). The C-CPUQ's three-factor model (Unpredictability of Parenting, Unpredictability of External Environment, and Unpredictability of Daily Happening) also showed a good fit (CFI = 0.96; TLI = 0.95; SRMR = 0.04; RMSEA = 0.07) and high reliability (alpha = 0.95), with significant correlations with Mini-K (r = -0.39, p < 0.001) and childhood trauma (r = 0.72, p < 0.001).

CONCLUSIONS

The newly adapted 14-item C-CPPWQ and 16-item C-CPUQ for Chinese contexts exhibit satisfactory psychometric properties, making them valuable tools for researching and evaluating childhood adversity.

Multivariate links between the developmental timing of adversity exposure and white matter tract connectivity in adulthood

BACKGROUND

Early-life adversity is pervasive worldwide and represents a potent risk factor for increased mental health burden across the lifespan. However, there is substantial individual heterogeneity in associations between adversity exposure, neurobiological changes, and mental health problems. Accounting for key features of adversity such as the developmental timing of exposure may clarify associations between adversity, neurodevelopment, and mental health.

METHODS

The present study leverages sparse canonical correlation analysis to characterize modes of covariation between adversity exposure across development and the connectivity of white matter tracts throughout the brain in a sample of 107 adults.

RESULTS

We found that adversity exposure during preschool-age and middle childhood (ages 4-5 and 8 in particular) were consistently linked across diffusion metrics with alterations in white matter tract connectivity. Whereas tracts supporting sensorimotor functions displayed higher connectivity with higher preschool-age and middle childhood adversity exposure, tracts supporting cortico-cortical communication displayed lower connectivity. Further, latent patterns of tract connectivity linked with adversity experienced across preschool-age and middle childhood (ages 3-8) were associated with post-traumatic stress symptoms in adulthood.

CONCLUSIONS

Our findings underscore that adversity exposure may differentially affect white matter in a function- and developmental-timing specific manner and suggest that adversity experienced between ages 3-8 may shape the development of white matter tracts across the brain in ways that are relevant for mental health in adulthood.

Transcriptional evidence of HPA axis dysregulation in adolescent females: Unique contributions of chronic early-life stressor exposure and maternal depression history

BACKGROUND

Depression risk increases dramatically for adolescent females following the pubertal transition. Although chronic early-life stressor exposure and a maternal history of depression are established risk factors for depression onset in this population, we know little about the biological mechanisms underlying these associations.

METHOD

To investigate, we examined how chronic early-life stressor exposure and maternal depression history were associated with stress-related gene expression patterns, using a high-risk family design in 48 psychiatrically healthy adolescent females, 20 of whom had a mother with a lifetime history of depression. Lifetime chronic stressor exposure was assessed using the STRAIN and gene expression patterns were estimated using transcriptional profiling of whole blood.

RESULTS

Consistent with hypotheses, we found that adolescent females with greater chronic stressor exposure had higher NR3C1 expression levels compared to those with less chronic stressor exposure. Additionally, youth with a depressed mother had lower levels of FKBP5 expression compared to those without a depressed mother. Levels of FKBP5 expression, in turn, interacted with chronic stressor exposure to predict NR3C1 expression. Specifically, for those with low chronic stressor exposure, levels of FKBP5 and NR3C1 expression were strongly interrelated, whereas for those with high chronic stressor exposure, NR3C1 expression was high regardless of levels of FKBP5 expression.

LIMITATIONS

This study was correlational, the sample size was limited, and additional research is needed to elucidate the underlying mechanisms and predict who subsequently develops depression.

CONCLUSIONS

Notwithstanding these limitations, these data indicate that having low FKBP5 expression, alongside high NR3C1 expression, may be a potential preclinical marker of depression risk in adolescent females that warrants additional investigation.

Mary Main's concept of conditional strategies: influences on studies of child-parent and adult romantic attachments

Among Mary Main's many vital contributions to the field of attachment is the idea that human infants develop adaptive conditional strategies in the service of maintaining proximity to a secure base in light of a particular caregiving history. In this tribute paper, we describe Main's original theorizing, which delineated three types of conditional strategies: a primary secure base strategy and two secondary strategies of minimizing or maximizing the naturally occurring output of the attachment behavioral system, using a variety of cognitive, affective, and behavioral means. We review the large body of evidence for minimizing and maximizing strategies in infancy, childhood, adolescence, and adulthood. Across a range of studies - including age groups and methodologies extending well beyond Main's original work with infants - there is remarkable convergence of findings that support Main's ideas. We conclude with several promising directions in implementing Main's groundbreaking ideas to enrich future research and clinical applications.

What Doesn't Kill You Makes You Stronger? Examining Relationships Between Early-Life Stress, Later-Life Inflammation and Mortality Risk in Skeletal Remains

OBJECTIVES

This paper explores conflicting perspectives on the adaptive significance of phenotypic plasticity during fetal and early postnatal development and the impact that stressors experienced during this critical early-life period have on later-life morbidity and mortality risk.

METHODS

The sample (n = 216) comprised archeologically-recovered human skeletons. A geometric morphometric (GM) method was employed to evaluate first permanent molar (M1) fluctuating asymmetry (FA) and provide a proxy for early-life stress. Shifts in later-life physiology were inferred through two inflammatory lesions: periosteal new bone formation (PNBF) and periodontal disease (PD). To explore mortality risk, age-at-death was estimated through dental development for skeletally immature individuals (n = 104) and through senescent skeletal changes for mature skeletons (n = 112).

RESULTS

Significant differences were found in M1 FA between groups, with the immature cohort associated with elevated FA. Within-group analysis revealed age-at-death in the immature group had a significant positive relationship with M1 FA and PD presence. In the mature group, alongside sex and the co-occurrence of PD and PNBF, FA was a significant predictor of a shorter life. Higher FA was also associated with active and bilaterally expressed PNBF.

CONCLUSIONS

It is theorized that early-life stress, if survived, programmed a hyperinflammatory response to environmentally-mediated physiological perturbations which increased the chances of survival during subsequent development but also elevated later-life mortality risk. Findings demonstrate a complicated relationship between developmental stress and physiological shifts that helps to illustrate the adaptive significance of early-life programming and support the Thrifty Phenotype hypothesis.

Childhood maltreatment and mental health problems in a 10-year follow-up study of adolescents in youth residential care: A latent transition analysis

Childhood maltreatment and mental health problems are common among young people placed out-of-home. However, evidence on the impact of maltreatment on the course of mental health problems in at-risk populations is sparse. The aim of this longitudinal study is twofold: (a) describe the course of mental health problems and the shift in symptom patterns among adolescents in youth residential care into young adulthood and (b) assess how childhood maltreatment is related to the course of mental health problems. One hundred and sixty-six adolescents in Swiss youth residential care were followed up into young adulthood (36.1% women; MAge-Baseline = 16.1 years; MAge-Follow-Up = 26.4 years). Latent transition analysis was employed to analyze transitions of symptom patterns and their association with maltreatment exposure. We found three latent classes of mental health problems: a "multiproblem"-class (51.8% baseline; 33.7% follow-up), a "low symptom"-class (39.2% baseline; 60.2% follow-up), and an "externalizing"-class (9.0% baseline; 6.0% follow-up). Individuals in the "multiproblem"-class were likely to transition towards less-complex symptom patterns. Higher severity of self-reported childhood maltreatment was associated with more complex and persistent mental health problems. Our study underlines the need for collaboration between residential and psychiatric care systems within and after care placements, with a specialized focus on trauma-informed interventions and care.

Psychobiological Stress Response Profiles in Current and Remitted Depression: A Person-Centered, Multisystem Approach

Background

A dysregulated stress response, including exaggerated affective reactivity and abnormal hypothalamic-pituitary-adrenal axis responsivity, has been implicated in the etiology, maintenance, and relapse of major depressive disorder (MDD). Among adolescents, discordant affective and physiological stress response profiles have been linked to negative affective outcomes and increased risk for psychopathology. Whether these findings extend to adults with varying degree of MDD risk is unclear, as are possible links to various risk factors.

Methods

We used a person-centered, multisystem approach in a sample of 119 unmedicated adults with current or remitted MDD and individuals without past MDD to evaluate psychobiological stress response profiles. Multitrajectory modeling was applied to positive affect, negative affect, and salivary cortisol (CORT) levels in response to the Maastricht Acute Stress Test.

Results

Analyses identified 4 within-person profiles, 1 typical, termed normative (n = 32, 26.9%) and 3 atypical: CORT hyperreactivity affective stability (n = 17, 14.3%), CORT hyporeactivity affective reactivity 1 (n = 45, 37.8%), and CORT hyporeactivity affective reactivity 2 (n = 25, 21.0%). While validating the assumption of a normative profile and increased risk for psychopathology in non-normative stress response profiles, coherent associations emerged between stress response profiles and clinical status, depression severity, anhedonia, perceived stress, childhood adversity, and reports of well-being, suggesting increased risk for psychopathology for individuals with a hyperreactive or discordant hyporeactive stress response profile.

Conclusions

This work advances our understanding of stress response mechanisms in MDD and underscores the potential of targeted interventions to enhance resilience and reduce psychopathology based on individual stress response profiles.

Earlier pubertal timing, not tempo, links time-limited early adversity with psychopathology

Evolutionary-developmental theories propose that early adverse experiences adaptively shift the timing (i.e., onset) and tempo (i.e., rate) of pubertal maturation. Empirical evidence of links between early life adversity and pubertal maturation is mixed, potentially in part because isolating the unique impacts of early environments is challenging. The current accelerated longitudinal study used a quasi-experimental design to examine pubertal maturation among 132 previously-institutionalized (PI), internationally adopted children who experienced a time-limited form of severe early life adversity, compared to 169 non-adopted (NA) children. Based on prior literature, we also assessed whether pubertal timing and/or tempo are pathways by which early adversity relates to later symptoms of psychopathology. At each of three annual sessions, Tanner pubertal staging was determined by nurse exam, and symptoms of psychopathology were captured in a composite of child self-reported internalizing and parent-reported externalizing symptoms. Findings revealed that, only among children at Tanner pubertal stages 3 or below, PI children were more likely to have reached stage 3 compared to NA children, reflective of earlier pubertal timing. No group differences were found for pubertal tempo. In the subsample of children at Tanner stage 3 or lower, earlier pubertal timing was an indirect pathway by which early adversity related to both higher levels and greater longitudinal declines in internalizing and externalizing symptoms of psychopathology, accounting for a small proportion of the total effect of early adversity on psychopathology. Results from this quasi-experimental study add to existing research on associations between early adversity, early pubertal timing, and psychopathology, further suggesting that links may be specific to timing but not tempo. While findings broadly align with recent calls to consider early pubertal maturation as a transdiagnostic risk marker with utility for identifying children who could benefit from early mental health intervention, they also suggest that pubertal timing is unlikely to be a robust target for reducing psychopathology risk in these children.

The Intersection of Personality Dimensions with Stress Relief Strategies in Adolescence: An Experimental Study

Stress is becoming more prevalent among adolescents and negatively impacts their health and development. It is, therefore, pivotal to increase our knowledge about potential (personalized) healthy stress relief strategies for adolescents. This study investigated individual personality differences (i.e., behavioral inhibition versus behavioral activation) in adolescents' preference for, and the effectiveness of, physical or mental exercise to relieve stress. A sample of 208 adolescents (12 to 18 years) were recruited during a science and education student festival in the Netherlands. For ethical reasons, no personally identifiable information could be collected. Surveys were used to assess personality and preferences at baseline and subjective stress at baseline, after stress induction with the Sing-a-Song Stress Test, and after stress relief through physical or mental exercise. The results from multivariate regression analyses indicate that personality did not significantly influence adolescents' preference for, or benefit from, physical or mental exercise for stress relief. Both types of exercise significantly reduced experienced stress, but the effect was stronger when adolescents performed their activity of choice. The findings suggest that pre- and intervention efforts for adolescents' stress-related health problems are better directed at offering a range of effective free-choice stress relief activities than on personalized stress-relief methods.

Adverse childhood experiences and emotion dynamics in daily life: a two sample study

Research suggests that adverse childhood experiences (ACEs) can have life-long consequences on emotional functioning. However, it is unclear how ACEs shape the dynamic features of everyday emotions. In the current preregistered study with two adult ecological momentary assessment samples (Ns = 122 and 121), we examined the linear and curvilinear associations of ACEs with daily emotion dynamic features. We expected ACEs to show linear associations with a higher baseline level, variability, and inertia of negative emotions, as well as a lower baseline level of positive emotions. Moreover, we expected ACEs to show U-shaped curvilinear associations with the variability of negative and positive emotions. The results did not support our hypotheses. Instead, ACEs showed an inverted U-shaped association with the baseline level and variability of negative emotions. Furthermore, ACEs also showed a U-shaped association with the baseline level of positive emotions and a linear association with higher variability of positive emotions. However, all associations were present in only one of the two samples. Our study underscores the critical need to incorporate a broad spectrum of ACEs in research samples to adequately capture their developmental consequences and the role of ACEs in contributing to the baseline level and variability of daily emotions.

Restoration of typical HPA-SAM co-activation following psychosocial intervention among preadolescent youth living in poverty

Despite the added value of multisystem (relative to traditional single-system) approaches for characterizing biological processes linked to risk for psychopathology (e.g., neuroendocrine stress responsivity; Buss et al., 2019; Quas et al., 2014), no study to date has evaluated whether multisystem processes may serve as viable biological targets of intervention. Utilizing a multiple-levels-of-analysis approach (Cicchetti & Dawson, 2002), this person-centered study examined whether stress-adapted patterns of hypothalamus-pituitary-adrenal (HPA) axis and sympathetic-adrenomedullary (SAM) system co-activation were amenable to change following the Building a Strong Identity and Coping Skills intervention (BaSICS; Wadsworth et al., 2022). Preadolescents exposed to concentrated poverty (n = 112, M age = 11.78 years, 57.1% female, 54% assigned to intervention; 40% Hispanic, 63% Black, 20% White) completed questionnaires and the Trier Social Stress Test at both pre- and posttest. Multitrajectory modeling of cortisol and alpha-amylase levels identified four pretest and posttest HPA-SAM co-activation profiles. At pretest, youth exhibiting Asymmetric Nos. 1 & 2 HPA-SAM co-activation reported greater maladjustment relative to youth with Symmetric Nos. 1 & 2 co-activation. Youth exhibiting Asymmetric No. 1 co-activation at pretest were more likely to exhibit Symmetric No. 1 co-activation following BaSICS relative to control. Findings highlight the potential of BaSICS to restore neuroendocrine stress response function in impoverished youth, pointing to HPA-SAM co-activation as a potential biological target of preventive intervention in this population.

Childhood emotional maltreatment and psychological richness among Chinese adolescents: The mediating effect of gratitude

BACKGROUND

Childhood emotional maltreatment impairs adolescents' well-being, but less is known about the link between childhood emotional maltreatment and adolescents' psychological richness, a new form of well-being and the mechanism underlying the link.

OBJECTIVE

This study aimed to reveal the longitudinal effect of childhood emotional maltreatment on psychological richness as well as the mediating role of gratitude among Chinese adolescents.

METHODS

A total of 577 (354 females; Mage = 16.19 years, SDage = 0.50 years) adolescents participated in this study by voluntarily completing questionnaires. First, we used a regression analysis to test the longitudinal relationship between childhood emotional maltreatment and adolescents' psychological richness. Next, we explored the mediating role of gratitude using a mediation analysis at two time points. For all of the above analyses we used gender, age, hedonic well-being and eudaimonic well-being as covariates.

RESULTS

The regression analysis revealed a negative relationship between childhood emotional maltreatment and psychological richness four months later in teenagers. The results of the mediation analysis showed that the association between psychological richness and childhood emotional maltreatment was mediated by gratitude.

CONCLUSIONS

This research demonstrated that childhood emotional maltreatment had a negative predictive role in teenagers' psychological richness and gratitude acted as a mediator in this relationship. Thus, enhancing gratitude levels may be an important intervention.

The future of neuroscience in developmental psychopathology

Developmental psychopathology started as an intersection of fields and is now a field itself. As we contemplate the future of this field, we consider the ways in which a newer, interdisciplinary field - human developmental neuroscience - can inform, and be informed by, developmental psychopathology. To do so, we outline principles of developmental psychopathology and how they are and/or can be implemented in developmental neuroscience. In turn, we highlight how the collaboration between these fields can lead to richer models and more impactful translation. In doing so, we describe the ways in which models from developmental psychopathology can enrich developmental neuroscience and future directions for developmental psychopathology.

Considering heterogeneity within negative emotionality can inform the distinction between diathesis-stress and differential susceptibility: Children's early anger and fear as moderators of effects of parental socialization on antisocial conduct

The importance of interactions between child temperament and parenting has been accepted ever since Thomas and Chess (1977) proposed their "goodness-of-fit" construct, but over the last three decades, pertinent research has grown exponentially. Researchers examining child characteristics that can moderate the effects of socialization have tested increasingly complex, nuanced, and sophisticated models, largely inspired by the highly influential frameworks of child plasticity or differential susceptibility (Belsky & Pluess, 2009). Yet, multiple questions remain unsettled. We addressed four such questions as applied to predicting children's observed disregard for rules at age 4.5 in a study of 200 community families from the US Midwest. (a) We examined children's observed negative emotionality at 16 months, most commonly seen as a plasticity "trait," but separating anger and fear proneness, which may differently moderate effects of socialization. (b) We examined two separate aspects of observed parental socialization at age 3, mutually responsive orientation and power assertion. (c) We distinguished analytically diathesis-stress from differential susceptibility. (d) We examined all effects in mother- and father-child relationships. We supported both diathesis-stress and differential susceptibility, depending on the facet of negative emotionality, the aspect of socialization considered, and parental gender, highlighting the nuanced nature of the processes involved.

Coming of age in war: Early life adversity, age at menarche, and mental health

Armed conflict and forced migration (ACFM) represent a set of extreme environments that are increasingly common for children and adolescents to experience. Adolescence may constitute a sensitive period (puberty and psychoneurological maturation) through which ACFM adversity leaves a lasting mark. Adolescence has become a focal point for analysis and intervention as it relates to the effects of early life adversity on puberty, linear growth, and mental health. Research in public health and psychological science suggests early life adversity (ELA) may accelerate puberty, heightening risks for mental health disorders. However, it is not well substantiated whether ACFM-derived adversities accelerate or delay relative pubertal timing. Secondly, ACFM provides salient context through which to probe the relationships between nutritional, psychosocial, and demographic changes and their respective impact on puberty and mental health. We conducted a narrative review which 1) examined constructions of early life adversity and their proposed influence on puberty 2) reviewed empirical findings (n = 29 studies, n = 36 samples) concerning effects of ACFM ELA on age at menarche and 3) discussed proposed relationships between early life adversity, puberty, and mental ill-health. Contrary to prior research, we found war-derived early life adversity was more consistently associated with pubertal delay than acceleration and may exert counterintuitive effects on mental health. We show that ELA cannot be operationalized in the same way across contexts and populations, especially in the presence of extreme forms of human stress and resilience. We further discuss the ethics of puberty research among conflict-affected youth.

Cognitive difficulties following adversity are not related to mental health: Findings from the ABCD study

Early life adversity is associated with differences in cognition and mental health that can impact on daily functioning. This study uses a hybrid machine-learning approach that combines random forest classification with hierarchical clustering to clarify whether there are cognitive differences between individuals who have experienced moderate-to-severe adversity relative to those have not experienced adversity, to explore whether different forms of adversity are associated with distinct cognitive alterations and whether these such alterations are related to mental health using data from the ABCD study (n = 5,955). Cognitive measures spanning language, reasoning, memory, risk-taking, affective control, and reward processing predicted whether a child had a history of adversity with reasonable accuracy (67%), and with good specificity and sensitivity (>70%). Two subgroups were identified within the adversity group and two within the no-adversity group that were distinguished by cognitive ability (low vs high). There was no evidence for specific associations between the type of adverse exposure and cognitive profile. Worse cognition predicted lower levels of mental health in unexposed children. However, while children who experience adversity had elevated mental health difficulties, their mental health did not differ as a function of cognitive ability, thus providing novel insight into the heterogeneity of psychiatric risk.

Leveraging the science of early life predictability to inform policies promoting child health

Addressing the tremendous burden of early-life adversity requires constructive dialogues between scientists and policy makers to improve population health. Whereas dialogues focused on several aspects of early-life adversity have been initiated, discussion of an underrecognized form of adversity that has been observed across multiple contexts and cultures is only now emerging. Here we provide evidence for "why unpredictability?", including: 1. Evidence that exposures to unpredictability affect child neurodevelopment, with influences that persist into adulthood. 2. The existence of a translational non-human animal model of exposure to early life unpredictability that can be capitalized upon to causally probe neurobiological mechanisms. 3. Evidence that patterns of signals in the early environment promote brain maturation across species. 4. The uneven distribution of unpredictability across demographic populations that illuminates a possible focal point for enhancing health equity. We then outline the potential of unpredictability in terms of the "what"; that is, how might the concept of unpredictability be leveraged to inform policy? We emphasize the importance of interdisciplinary and community partnerships to the success of this work and describe our community-engaged research project. Finally, we highlight opportunities for the science of unpredictability to inform policies in areas such as screening, immigration, criminal justice, education, childcare, child welfare, employment, healthcare and housing.

Pubertal timing mediates the association between threat adversity and psychopathology

BACKGROUND

Exposure to adversity in childhood is a risk factor for lifetime mental health problems. Altered pace of biological aging, as measured through pubertal timing, is one potential explanatory pathway for this risk. This study examined whether pubertal timing mediated the association between adversity (threat and deprivation) and adolescent mental health problems (internalizing and externalizing), and whether this was moderated by sex.

METHODS

Aims were examined using the Adolescent Brain and Cognitive Development study, a large community sample from the United States. Data were used from three timepoints across the ages of 9-14 years. Latent scores from confirmatory factor analysis operationalized exposure to threat and deprivation. Bayesian mixed-effects regression models tested whether pubertal timing in early adolescence mediated the relationship between adversity exposure and later internalizing and externalizing problems. Sex was examined as a potential moderator of this pathway.

RESULTS

Both threat and deprivation were associated with later internalizing and externalizing symptoms. Threat, but not deprivation, was associated with earlier pubertal timing, which mediated the association of threat with internalizing and externalizing problems. Sex differences were only observed in the direct association between adversity and internalizing problems, but no such differences were present for mediating pathways.

CONCLUSIONS

Adversity exposure had similar associations with the pace of biological aging (as indexed by pubertal timing) and mental health problems in males and females. However, the association of adversity on pubertal timing appears to depend on the dimension of adversity experienced, with only threat conferring risk of earlier pubertal timing.

Intergenerational effects of maternal childhood maltreatment on newborns' stress regulation: The role of maternal depressive symptoms

BACKGROUND

Maternal childhood maltreatment (CM) has been repeatedly associated with negative offspring's emotional outcomes. The dysregulation of the Hypothalamic-Pituitary-Adrenal (HPA) axis has emerged as the main underlying physiological mechanism.

OBJECTIVE

To explore the association between maternal CM and newborns' physiological and neurobehavioral stress responses, considering the role of perinatal maternal depression and bonding.

PARTICIPANTS AND SETTING

150 healthy women were followed throughout pregnancy. 79 mother-infant dyads were included in the final analyses. Maternal CM was evaluated using the Childhood Trauma Questionnaire and depressive symptoms by the Edinburgh Postnatal Depression Scale (EPDS) at each trimester. At 7 weeks postpartum, the EPDS and the Postpartum Bonding Questionnaire were administered. Newborns' behavioral responses were assessed using "States Organization" (SO) and "States Regulation" (SR) subdomains of the Neonatal Behavioral Assessment Scale (NBAS). Newborns' salivary samples were collected before and after the NBAS to study cortisol reactivity.

METHODS

A cross-lagged panel model was employed.

RESULTS

Infants born to mothers with higher CM presented more optimal scores on SO (β (0.635) = 0.216, p 〈001) and SR (ß (0.273) = 0.195, p = .006), and a higher cortisol reactivity after NBAS handling (β(0.019) = 0.217, p = .009). Moreover, newborns of mothers with higher CM and postpartum depressive symptoms exhibited a poorer performance on SR (ß (0.156 = -0.288,p = .002). Analyses revealed non-significant relationships between mother-infant bonding, newborns' cortisol reactivity and SO.

CONCLUSIONS

Newborns from mothers with greater CM present higher cortisol reactivity and more optimal behavioral responses, which may reflect a prenatal HPA axis sensitization. However, those exposed to maternal postnatal depressive symptoms present poorer stress recovery.

Childhood trauma is linked to epigenetic age deceleration in young adults with previous youth residential care placements

Background: Early adversity increases the risk for mental and physical disorders as well as premature death. Epigenetic processes, and altered epigenetic aging in particular, might mediate these effects. While the literature that examined links between early adversity and epigenetic aging is growing, results have been heterogeneous.Objective: In the current work, we explored the link between early adversity and epigenetic aging in a sample of formerly out-of-home placed young adults.Method: A total of N = 117 young adults (32% women, age mean = 26.3 years, SD = 3.6 years) with previous youth residential care placements completed the Childhood Trauma Questionnaire (CTQ) and the Life Events Checklist (LEC-R) and provided blood samples for the analysis of DNA methylation using the Illumina Infinium MethylationEPIC BeadChip Microarray. Epigenetic age was estimated using Hovarth's and Hannum's epigenetic clocks. Furthermore, Hovarth's and Hannum's epigenetic age residuals were calculated as a proxy of epigenetic aging by regressing epigenetic age on chronological age. The statistical analysis plan was preregistered (https://osf.io/b9ev8).Results: Childhood trauma (CTQ) was negatively associated with Hannum's epigenetic age residuals, β = -.23, p = .004 when controlling for sex, BMI, smoking status and proportional white blood cell type estimates. This association was driven by experiences of physical neglect, β = -.25, p = .001. Lifetime trauma exposure (LEC-R) was not a significant predictor of epigenetic age residuals.Conclusion: Childhood trauma, and physical neglect in particular, was associated with decelerated epigenetic aging in our sample. More studies focusing on formerly institutionalized at-risk populations are needed to better understand which factors affect stress-related adaptations following traumatic experiences.

Adaptation and validation for use in Brazil of the Confusion, Hubbub, and Order Scale (CHAOS)

BACKGROUND

The Confusion, Hubbub, and Order Scale (CHAOS in English Version) was originally developed in the USA by Matheny et al (Bringing order out of chaos: psychometric characteristics of the confusion, hubbub, and order scale. Journal of Applied Developmental Psychology 16(3):429-444, 1995) to measure chaos in the family environment, characterized by confusion, lack of routine, and organization.

OBJECTIVE

To present evidence of content validity, internal structure validity, and validity based on relationships with external measures of an adapted version of the CHAOS into Brasilian Portuguese with adolescents sample in São Paulo - Brasil.

METHOD

Study 1 involved the translation/back-translation and adaptation of the scale into Brazilian Portuguese [here named "Escala de Confusão, Alvoroço e Ordem no Sistema familiar" (CAOS)], assessed by 5 judges. In Study 2, we conducted an exploratory factor analyses (EFA) to determine the scale's factor structure (N = 180 adults). In Study 3, we carried out confirmatory factor analyses (CFA) to confirm the internal validity of the scale, along with complete structural equation modeling to explore convergent validity in another sample (N = 239 adolescents).

RESULTS

The CAOS scale displayed content validity, and the EFA and CFA showed a unifactorial structure (with some scale adjustments) with an acceptable fit. The family chaos latent factor was associated with externalizing symptoms and perceived stress in adolescents.

CONCLUSION

Overall, the Brazilian version of the scale presented evidence of construct, internal, and concurrent validity that indicate its usefulness in Brazil.

New policies on skin-to-skin contact warrant an oxytocin-based perspective on perinatal health care

Background

In 2023, the World Health Organization (WHO) published a Global Position Paper on Kangaroo Mother Care (KMC), which is applicable to all countries worldwide: from the moment of birth, every "small and sick" newborn should remain with mother in immediate and continuous skin-to-skin contact (SSC), receiving all required clinical care in that place. This was prompted by the startling results of a randomized controlled trial published in 2021: in which 1,609 infants receiving immediate SSC were compared with 1,602 controls that were separated from their mothers but otherwise received identical conventional state-of-the-art care. The intervention infants showed a 25% reduction in mortality after 28 days.

New perspectives

The new WHO guidelines are a significant change from earlier guidance and common clinical practice. The author presents that separating mothers and babies is assumed to be "normal" (a paradigm) but actually puts newborns at increased risk for morbidity and mortality. The author presents arguments and ethical perspectives for a new perspective on what is "normal," keeping newborns with their mothers is the infant's physiological expectation and critical requirement for healthy development. The author reviews the scientific rationale for changing the paradigm, based on synchronous interactions of oxytocin on both mother and infant. This follows a critique of the new policies that highlights the role of immediate SSC.

Actionable recommendations

This critique strengthens the case for implementing the WHO guidelines on KMC for small and sick babies. System changes will be necessary in both obstetric and neonatal settings to ensure seamless perinatal care. Based on the role of oxytocin, the author identifies that many current routine care practices may actually contribute to stress and increased vulnerability to the newborn. WHO has actionable recommendations about family involvement and presence in newborn intensive care units.

Discussion

The concepts of resilience and vulnerability have specific definitions well known in perinatal care: the key outcome of care should be resilience rather than merely the absence of vulnerability. Newborns in all settings and contexts need us to re-evaluate our paradigms and adopt and implement the new WHO guidelines on KMC in perinatal care.

Childhood trauma and hair cortisol response over the year following onset of a chronic life event stressor

OBJECTIVE

Childhood trauma may contribute to poor lifelong health in part through programming of the HPA-axis response to future life stressors. To date, empirical evidence shows an association of childhood trauma with dysregulation of the HPA-axis and blunted cortisol reactivity to acute stressors. Here, we conduct an initial examination of childhood trauma as a moderator of changes over time in perceived stress levels and HPA-axis response to a major chronic stressor in adulthood.

METHODS

Participants were 83 maternal caregivers of children newly diagnosed with cancer who completed the Childhood Trauma Questionnaire (CTQ), and who, over the year following their child's cancer diagnosis, had hair samples collected up to 7 times for the assessment of cortisol and completed monthly measures of perceived stress.

RESULTS

CTQ scores were in the expected range for a community sample and associated with changes in perceived stress and cortisol concentration over time (γ =.003, p =.002; γ = -.0004, p =.008, respectively) independently of age, education, treatment intensity and randomization to stress management intervention. Maternal caregivers who endorsed lower childhood trauma showed a steeper decline in perceived stress and a larger increase in cortisol levels across the year than caregivers who recalled more childhood trauma.

CONCLUSIONS

Findings extend animal models and studies that examine cortisol reactivity to acute stressors and suggest that childhood trauma may program a phenotype that is more psychologically reactive but shows a blunted HPA-axis response to chronic stress. While adaptive in the short-term, this early life programming may incur long-term costs for health. Further work is warranted to examine this possibility.

The Relationship between Socioeconomic Status and Academic Achievement is Mediated and Moderated by Executive Functions

Executive function is an underlying mechanism linking family socioeconomic status (SES) and academic achievement. Previous studies mainly investigated either the mediating or moderating role of executive function within this relationship, which either overlook the individual differences that are independent of the environment or neglect the influence of the environment on shaping personal factors. To avoid a piecemeal approach to theory, the current study aimed to test the mediating and moderating roles of executive function in a single analytic model. Two hundred and thirty-six Chinese fifth graders (Mage = 10.70 years, SD = 0.49, range = 10.23-11.75 years, and 40.30% girls) were recruited. Their executive function performance was measured using eight different tasks, and their Chinese literacy skills and mathematics achievement were assessed by routine school evaluations. One year after the initial assessment, children's academic achievements were evaluated again. Results demonstrated that parental SES positively predicted children's academic achievement when controlling for prior academic achievement, and children's executive function mediated this relationship. Also, executive function moderated the association between SES and academic achievement in that, the negative predictive effect of low SES on academic achievement was only significant for children with lower levels of executive function, which is not shown in children with higher levels of executive function. By demonstrating the dual roles of executive function in the SES-achievement link, this work provides evidence for supporting the optimal development of children from diverse socioeconomic backgrounds and emphasizes the significance of developing individualized intervention strategies on executive function to mitigate the negative effect of low SES on children's academic achievement.

Prenatal family income, but not parental education, is associated with resting brain activity in 1-month-old infants

Childhood socioeconomic disadvantage is associated with disparities in development and health, possibly through adaptations in children's brain function. However, it is not clear how early in development such neural adaptations might emerge. This study examined whether prenatal family socioeconomic status, operationalized as family income and average years of parental education, prospectively predicts individual differences in infant resting electroencephalography (EEG; theta, alpha, beta, and gamma power) at approximately 1 month of age (N = 160). Infants of mothers reporting lower family income showed more lower-frequency (theta) and less higher-frequency (beta and gamma) power. These associations held when adjusting for other prenatal and postnatal experiences, as well as infant demographic and health-related factors. In contrast, parental education was not significantly associated with infant EEG power in any frequency band. These data suggest that lower prenatal family income is associated with developmental differences in brain function that are detectable within the first month of life.

Does Grit Compensate for Family Background Disadvantage in Predicting Mental Health Difficulties? A Longitudinal Study of Chinese Migrant and Urban Children

The significant population of Chinese rural-to-urban migrant children has sparked considerable domestic and international concern regarding their disadvantaged family circumstances and their escalating prevalence of internalizing and externalizing problems. Derived from the resource substitution hypothesis, non-cognitive factors such as personality traits may act as "substitution" resources for educational outcomes of children from less privileged families. Yet, the compensatory role of personality traits as substitution resources in children's mental health has received limited attention, including that of migrant children. This study examined the interplay of trait-like grit and family SES on emotional and conduct problems among Chinese migrant and urban children. The current sample consisted of 770 migrant children (Mage = 10.45 and SDage = 0.68 years; 38.4% girls) and their 222 urban counterparts (Mage = 10.34 and SDage = 0.46 years; 45.5% girls). Moderated polynomial regressions with response surface analysis on a two-wave data with an interval of over six months showed that grit served as a "substitution" resource for the less socioeconomically advantaged children. The compensatory effect of perseverance of effort on urban children's emotional problems and that of consistency of interest on migrant children's conduct problems were visualized. Moreover, the two compensatory effects were found to be robust and unique, even after children's effortful control, a grit-related construct, was taken into account. These findings not only support the resource substitution hypothesis, but also underscore the protective role that grit plays in children under less privileged environments.

Subjective Socioeconomic Status Moderates How Resting Heart Rate Variability Predicts Pain Response

Higher resting heart rate variability (HRV)-an index of more flexible response to environmental stressors, including noxious stimuli-has been linked to reduced perception of experimentally induced pain. However, as stress responses are adapted to one's chronic environments, we propose that chronic exposure to threats captured by one's subjective socioeconomic status (SSS) may shape different adaptations that produce distinct pain responses linked to higher resting HRV. Specifically, lower SSS individuals with more threat exposures may prioritize threat detection by upregulating sensitivity to stressors, such as acute pain. Therefore, higher HRV would predict greater perceived acute pain among lower SSS individuals. In contrast, higher SSS individuals with less threat exposures may instead prioritize affective regulation by downregulating sensitivity to stressors, producing lower pain perception with higher HRV. We examined this stress response moderation by SSS in 164 healthy young adults exposed to experimental pain via the cold pressor test (CPT). Resting HRV, indexed by the root-mean-square of successive differences in heart rate, and self-reported SSS were measured at rest. Pain perception indexed by self-reported pain and pain tolerance indexed by hand-immersion time during the CPT were assessed. Results revealed that among higher SSS individuals, higher resting HRV predicted lower pain reports and subsequently greater pain tolerance during the CPT. Conversely, among lower SSS individuals, higher resting HRV predicted higher pain reports and subsequently lower pain tolerance. These findings provide preliminary evidence that environmental stress exposures linked to one's SSS may shape unique biological adaptations that predict distinct pain responses.

Supplementary Information

The online version contains supplementary material available at 10.1007/s42761-023-00234-w.

Is it a vicious circle and for whom? The reciprocal association between rumination and somatic symptoms and moderation by stress: A daily diary study among Chinese college students

College students who experienced somatic symptoms during the COVID-19 pandemic may engage in rumination, but their bidirectional nature remains underexplored. Symptom perception theory suggests a reciprocal relationship between rumination and somatic symptoms, and the multiple-stressor perspective and the perseverative cognition hypothesis assume that the reciprocal association might be exacerbated by high stress. In this study, we examined temporal associations between rumination and somatic symptoms and variations by patterns of stress related to COVID-19 and daily hassles. A total of 582 Chinese college students provided daily reports on rumination, somatic symptoms, COVID-related stress, and daily hassles for seven consecutive days in November 2020. A cross-lagged panel model showed a positive reciprocal association between rumination and somatic symptoms. Greater rumination predicted more next-day somatic symptoms, and more somatic symptoms increased next-day rumination. Dual trajectory analysis identified four stress patterns of COVID-related stress and daily hassles (i.e. low-low, low-high, high-low, and high-high), and multi-group analysis found the reciprocal association only presented in the high-high group. Our findings indicate a vicious circle between rumination and somatic symptoms that is dependent on heterogeneous stress patterns. Attention should be paid to the high-risk group with both high levels of COVID-related stress and daily hassles.

Exploring low-dose gamma radiation effects on monoterpene biosynthesis in Thymus vulgaris: insights into plant defense mechanisms

Thymus vulgaris, commonly known as thyme, is a plant renowned for producing monoterpenes. This study aimed to understand the effects of low-dose gamma radiation, specifically in the range of 1-5 Gy, on various traits of Thymus vulgaris, providing context on its importance in agricultural and medicinal applications. The research explored morpho-physiological, biochemical, and gene-expression responses in thyme plants under no gamma- and gamma-ray exposure conditions. The study revealed complex relationships between gamma-ray doses and plant characteristics. In particular, shoot and root lengths initially increased with low doses (1-3 Gy) but decreased at higher doses (5 Gy), suggesting a dose-dependent threshold effect. Similarly, shoot and root fresh weights displayed an initial increase followed by a decline with increasing doses. Biochemical parameters showed dose-dependent responses, with low to moderate doses (1-3 Gy) stimulating enzyme activities and high doses (5 Gy) inhibiting them. Gene expression analysis was focused on the following specific genes: thymol synthase, γ-terpinene synthase, and carvacrol synthase. Low to moderate doses increased the expression of these genes, resulting in increased production of bioactive compounds. However, higher doses had diminished effects or suppressed gene expression. Metabolite analysis demonstrated dose-dependent responses, with moderate doses enhancing secondary metabolite production, while higher doses provided limited benefits. These findings underscore the implications of using gamma radiation to enhance secondary metabolite production in plants and its potential applications in agriculture, medicine, and environmental science. The study emphasizes the potential of gamma radiation as an external stressor to influence plant responses and highlights the importance of understanding such effects in various fields.

Child abuse and pubertal timing: what is the role of child sex and identity of the perpetrator?

BACKGROUND

This study investigated the association between child abuse [child neglect (CN), emotional (CEA) and physical abuse (CPA)] and early puberty with special regard to sex-specific effects concerning child and parental perpetrator.

METHODS

Data assessment took place within the framework of the LIFE Child Depression study, a longitudinal study on the development of depressive symptoms and disorders between child- and adulthood in Leipzig, Germany. A sample of 709 children (8-14 years) was recruited from the general population and via psychiatric hospitals. Data on pubertal status were assessed using an instrument for self-assessment of tanner stages (scales of physical pubertal development). Information on menarche was provided by parents. The Parent-Child Conflict Tactics Scales (CTS-PC) served for data on child abuse.

RESULTS

Regarding physical puberty markers, significant correlations were found, especially with child neglect (CN) and child emotional abuse (CEA). Regression analyses, controlling for Body-Mass-Index (BMI) and Socioeconomic Status (SES), revealed that children affected by child neglect perpetrated by mother (CNm) and child emotional abuse (CEA) parent-non-specifically enter puberty significantly earlier. Sex-specific analyses identified child neglect perpetrated by mother (CNm) to be associated with early puberty in girls and child emotional abuse perpetrated by father (CEAf) with early puberty in boys. Concerning the onset of menstruation, there was a significant positive correlation between early menarche and parent-specific and non-specific child neglect (CN), as well as between early menarche and child emotional abuse perpetrated by the mother (CEAm). In regression models that controlled for Body-Mass-Index (BMI) and Socioeconomic Status (SES) no significant associations were maintained. Child physical abuse (CPA) was not associated with early puberty.

CONCLUSION

Results outlined child neglect (CN) and child emotional abuse (CEA) to be sex- and perpetrator-specific risk factors for early pubertal development. Knowledge of sex- and perpetrator-specific effects could help clinicians to specify their diagnostic process and to define differential prevention and treatment goals for children with experiences of CN and CEA. Further research on the sex-specific impact of parental CN and CEA on girls' and boys' puberty is needed.

Annual Research Review: The power of predictability - patterns of signals in early life shape neurodevelopment and mental health trajectories

The global burden of early life adversity (ELA) is profound. The World Health Organization has estimated that ELA accounts for almost 30% of all psychiatric cases. Yet, our ability to identify which individuals exposed to ELA will develop mental illness remains poor and there is a critical need to identify underlying pathways and mechanisms. This review proposes unpredictability as an understudied aspect of ELA that is tractable and presents a conceptual model that includes biologically plausible mechanistic pathways by which unpredictability impacts the developing brain. The model is supported by a synthesis of published and new data illustrating the significant impacts of patterns of signals on child development. We begin with an overview of the existing unpredictability literature, which has focused primarily on longer patterns of unpredictability (e.g. years, months, and days). We then describe our work testing the impact of patterns of parental signals on a moment-to-moment timescale, providing evidence that patterns of these signals during sensitive windows of development influence neurocircuit formation across species and thus may be an evolutionarily conserved process that shapes the developing brain. Next, attention is drawn to emerging themes which provide a framework for future directions of research including the evaluation of functions, such as effortful control, that may be particularly vulnerable to unpredictability, sensitive periods, sex differences, cross-cultural investigations, addressing causality, and unpredictability as a pathway by which other forms of ELA impact development. Finally, we provide suggestions for prevention and intervention, including the introduction of a screening instrument for the identification of children exposed to unpredictable experiences.

Long-term Neighborhood Poverty Effects on Internalizing Symptoms in Adolescents: Mediated Through Allostatic Load and Pubertal Timing

PURPOSE

The long-term effect of neighborhood poverty on internalizing symptoms in adolescents and the biological mechanisms underlying this association remain unclear. We defined neighborhood poverty at the village level in two dimensions: intensity (i.e., poverty rate) and duration. This study investigated how the poverty rate and duration of exposure to neighborhood poverty interact to predict internalizing symptoms in adolescents through biological mechanisms (i.e., allostatic load and early pubertal timing).

METHODS

A total of 418 adolescents (50.2% girls; 11-14 years old; mean age = 12.57 years) living in rural China participated in two waves of data collection. Path analysis was conducted to examine the mediating role of allostatic load and pubertal timing in the relationship between the duration of exposure to neighborhood poverty and internalizing symptoms. Moreover, the interactive effect between the poverty rate and duration of neighborhood poverty on the allostatic load was tested.

RESULTS

The positive association between the duration of exposure to neighborhood poverty and internalizing symptoms of adolescents was explained by elevated allostatic load and early pubertal timing after adjusting for gender, age, prior family socioeconomic states and internalizing symptoms. The duration in neighborhood poverty was a stronger predictor of allostatic load for adolescents living in high poverty rate neighborhoods than for those living in low poverty rate neighborhoods.

DISCUSSION

Neighborhood poverty gets "under the skin" through biological pathways and affects internalizing symptoms among adolescents. The findings highlight the importance of considering different dimensions of neighborhood poverty (e.g., intensity and duration) on adolescents' health.

Investment by maternal grandmother buffers children against the impacts of adverse early life experiences

Exogenous shocks during sensitive periods of development can have long-lasting effects on adult phenotypes including behavior, survival and reproduction. Cooperative breeding, such as grandparental care in humans and some other mammal species, is believed to have evolved partly in order to cope with challenging environments. Nevertheless, studies addressing whether grandparental investment can buffer the development of grandchildren from multiple adversities early in life are few and have provided mixed results, perhaps owing to difficulties drawing causal inferences from non-experimental data. Using population-based data of English and Welsh adolescents (sample size ranging from 817 to 1197), we examined whether grandparental investment reduces emotional and behavioral problems in children resulting from facing multiple adverse early life experiences (AELEs), by employing instrumental variable regression in a Bayesian structural equation modeling framework to better justify causal interpretations of the results. When children had faced multiple AELEs, the investment of maternal grandmothers reduced, but could not fully erase, their emotional and behavioral problems. No such result was observed in the case of the investment of other grandparent types. These findings indicate that in adverse environmental conditions the investment of maternal grandmothers can improve child wellbeing.

Grade prediction in the middle east: a post-pandemic case study of the optimism bias

Evidence exists that the pandemic has brought about stress, and altered study habits and academic performance. No evidence exists regarding whether metacognition has also been altered. The present field study examined the accuracy and confidence with which college students make grade predictions in a general education course after the pandemic. It tested whether one of three types of biases affected students' predictions as a way to cope with the uncertainty of a final exam's outcome: illusion-of-knowing, optimism, and pessimistic bracing. Students made predictions both before and after completing the final exam (summative assessment) to determine the impact of each of the hypothesized biases on estimates made in a context of varying uncertainty. Accuracy was computed as the difference between expected and actual grades on the final exam. Confidence in the predictions made was measured on a Likert scale. Exam performance was categorized as good, poor, or inadequate. In this study, less-than-desirable performance was accompanied by overestimations. However, overestimations were made with little confidence and benefited from the information acquired from completing the exam. This pattern of results suggests that students who are not doing well are not under the spell of the illusion-of-knowing phenomenon. Indeed, their optimistic predictions are punctured by the awareness of a likely undesirable outcome (as indicated by their weak confidence in the predictions made). Implications and applications of these findings are discussed.

Socioeconomic Disparities in Hypothalamic-Pituitary-Adrenal Axis Regulation and Prefrontal Cortical Structure

Socioeconomic disadvantage during childhood predicts an increased risk for mental health problems across the life span. Socioeconomic disadvantage shapes multiple aspects of children's proximal environments and increases exposure to chronic stressors. Drawing from multiple literatures, we propose that childhood socioeconomic disadvantage may lead to adaptive changes in the regulation of stress response systems including the hypothalamic-pituitary-adrenal (HPA) axis. These changes, in turn, affect the development of prefrontal cortical (PFC) circuitry responsible for top-down control over cognitive and emotional processes. Translational findings indicate that chronic stress reduces dendritic complexity and spine density in the medial PFC and anterior cingulate cortex, in part through altered HPA axis regulation. Socioeconomic disadvantage has frequently been associated with reduced gray matter in the dorsolateral and ventrolateral PFC and anterior cingulate cortex and lower fractional anisotropy in the superior longitudinal fasciculus, cingulum bundle, and uncinate fasciculus during middle childhood and adolescence. Evidence of socioeconomic disparities in hair cortisol concentrations in children has accumulated, although null findings have been reported. Coupled with links between cortisol levels and reduced gray matter in the PFC and anterior cingulate cortex, these results support mechanistic roles for the HPA axis and these PFC circuits. Future longitudinal studies should simultaneously consider multiple dimensions of proximal factors, including cognitive stimulation, while focusing on epigenetic processes and genetic moderators to elucidate how socioeconomic context may influence the HPA axis and PFC circuitry involved in cognitive and emotional control. These findings, which point to modifiable factors, can be harnessed to inform policy and more effective prevention strategies.

Multi-omics in stress and health research: study designs that will drive the field forward

Despite decades of stress research, there still exist substantial gaps in our understanding of how social, environmental, and biological factors interact and combine with developmental stressor exposures, cognitive appraisals of stressors, and psychosocial coping processes to shape individuals' stress reactivity, health, and disease risk. Relatively new biological profiling approaches, called multi-omics, are helping address these issues by enabling researchers to quantify thousands of molecules from a single blood or tissue sample, thus providing a panoramic snapshot of the molecular processes occurring in an organism from a systems perspective. In this review, we summarize two types of research designs for which multi-omics approaches are best suited, and describe how these approaches can help advance our understanding of stress processes and the development, prevention, and treatment of stress-related pathologies. We first discuss incorporating multi-omics approaches into theory-rich, intensive longitudinal study designs to characterize, in high-resolution, the transition to stress-related multisystem dysfunction and disease throughout development. Next, we discuss how multi-omics approaches should be incorporated into intervention research to better understand the transition from stress-related dysfunction back to health, which can help inform novel precision medicine approaches to managing stress and fostering biopsychosocial resilience. Throughout, we provide concrete recommendations for types of studies that will help advance stress research, and translate multi-omics data into better health and health care.

Metabolomics reveals that chronic restraint stress alleviates carbon tetrachloride-induced hepatic fibrosis through the INSR/PI3K/AKT/AMPK pathway

Hepatic fibrosis (HF) could be developed into liver cirrhosis or even hepatocellular carcinoma. Stress has an important role in the occurrence and development of various considerable diseases. However, the effect of a certain degree stress on HF is still controversial. In our study, stress was simulated with regular chronic restraint stress (CRS) and HF model was induced with CCl4 in mice. We found that CRS was able to attenuate CCl4-induced liver injury and fibrosis in mice. Surprisingly, behavioral analysis showed that the mice in the HF group exhibited depression-like behavior. Further, the metabolomic analysis revealed that 119 metabolites and 20 metabolic pathways were altered in mice liver, especially the betaine metabolism pathway. Combined with the results of Ingenuity Pathway Analysis (IPA), the key proteins INSR, PI3K, AKT, and p-AMPK were identified and verified, and the results showed that CRS could upregulate the protein levels and mRNA expression of INSR, PI3K, AKT, and p-AMPK in liver tissues of HF mice. It suggested that CRS alleviated CCl4-induced liver fibrosis in mice through upregulation of the INSR/PI3K/AKT/AMPK pathway. Proper stress might be a potential therapeutic strategy for the treatment of chronic liver disease, which provided new insights into the treatment of HF. KEY MESSAGES: Chronic restraint stress mitigated CCl4-induced liver injury and hepatic fibrosis. CCl4-induced liver fibrosis could cause depression-like behavior. Chronic restraint stress altered metabolomic profiles in hepatic fibrosis mice, especially the betaine metabolism pathway. Chronic restraint stress increased betaine levels in liver tissue. Chronic restraint stress regulated the INSR/PI3K/AKT/AMPK signaling pathway in hepatic fibrosis mice.

Shorter Goals for the Faster Life: Childhood Unpredictability Is Associated With Shorter Motivational Time Horizons

Models of adaptive calibration provide an overarching theoretical framework for understanding the developmental roots of psychological and behavioral outcomes in adulthood. An adaptive calibration framework was used to examine an important dimension of motivation: goal timing. Across two studies, we saw mixed support for the hypothesis that unpredictability experienced in childhood would be negatively associated with the time horizons people use to set their goals, such that people who reported experiencing more unpredictability in their childhood tended to set goals on relatively shorter time horizons. The association was observed based on independent ratings of goal timing, but not based on participants' self-reported ratings of goal timing, and was statistically mediated by people's tendency to consider the short- versus long-term future consequences of their actions. These studies isolate a key component of childhood adversity-unpredictability-potentially underlying the time horizons people use to set, prioritize, and pursue their goals.

Neighborhood poverty during childhood prospectively predicts adolescent functional brain network architecture

Family poverty has been associated with altered brain structure, function, and connectivity in youth. However, few studies have examined how disadvantage within the broader neighborhood may influence functional brain network organization. The present study leveraged a longitudinal community sample of 538 twins living in low-income neighborhoods to evaluate the prospective association between exposure to neighborhood poverty during childhood (6-10 y) with functional network architecture during adolescence (8-19 y). Using resting-state and task-based fMRI, we generated two latent measures that captured intrinsic brain organization across the whole-brain and network levels - network segregation and network segregation-integration balance. While age was positively associated with network segregation and network balance overall across the sample, these associations were moderated by exposure to neighborhood poverty. Specifically, these positive associations were observed only in youth from more, but not less, disadvantaged neighborhoods. Moreover, greater exposure to neighborhood poverty predicted reduced network segregation and network balance in early, but not middle or late, adolescence. These effects were detected both across the whole-brain system as well as specific functional networks, including fronto-parietal, default mode, salience, and subcortical systems. These findings indicate that where children live may exert long-reaching effects on the organization and development of the adolescent brain.

Building resilience through daily smartphone app use: results of a pilot study of the JoyPop app with social work students

Background

The JoyPop™ smartphone app is a digital intervention designed to enhance day-to-day resilience in youth, particularly those exposed to traumatogenic events [adverse childhood experiences (ACEs)]. Processes of adaptation that foster resilience in response to high stress include affect, cognitive, and behavioral regulation, and social interaction. Digital interventions have application for youth and those who provide them support, including social work trainees navigating the stressors of university studies concurrent with practice internships. Research on resilience-enhancing apps is needed to understand the underlying mechanisms by which change occurs and who is most likely to benefit from these interventions.

Methods

Social work student participants (N = 91) were invited to use the JoyPop app two times daily for 28 days. Baseline ACE exposure and change-over-time in affect regulation, stress responsivity, and social support were evaluated after 2 and 4 weeks of app use with t-tests and generalized estimating equation (GEE) modeling.

Results

Participants identified predominantly as cisgender women of European descent, mean age 26 years (SD = 6.78), 70% undergraduates, and reported consistent daily app use (Mean days = 26.9, SD = 1.90). Self-reported baseline ACE exposure was high (30% ≥ 5+). We tested change-over-time with generalized estimating equation and saw improvement in affect regulation in the Abbreviated Dysregulation Inventory scale (β = -3.38, p = <.001), and subscales of behavioral (β = -1.63, p = <.001), affect (β = -3.24, p = <.001), and cognitive regulation (β = 1.50, p = .009). Perceived stress decreased with app use (β = -2.65, p = <.001) and even more so for participants with reported exposure to more than 4 ACEs (β = -3.786, p = .030).

Conclusions

The exploratory findings from our pilot study suggest that consistent use of the app may enhance multidimensional resilience amongst university students who self-report higher than average levels of baseline traumatogenic exposures. Our findings support an approach modeling resilience as a complex, dynamic, multicomponent process supported by resources within and between individuals. Further testing of the mechanisms of adaptation in response to high stress that enhance resilience and identification of the JoyPop™ app features that influence this change is needed to validate that daily app use could help youth with experiences of past and current high stress to better regulate their affect, reduce stress reactivity, and increase resilience.

Multivariate links between the developmental timing of adversity exposure and white matter tract integrity in adulthood

Early-life adversity is pervasive worldwide and represents a potent risk factor for increased mental health burden across the lifespan. However, there is substantial individual heterogeneity in associations between adversity exposure, neurobiological changes, and mental health problems. Accounting for key features of adversity such as the developmental timing of exposure may clarify associations between adversity, neurodevelopment, and mental health. The present study leverages sparse canonical correlation analysis to characterize modes of covariation between age of adversity exposure and the integrity of white matter tracts throughout the brain in a sample of 107 adults. We find that adversity exposure during middle childhood (ages 5-6 and 8-9 in particular) is consistently linked with alterations in white matter tract integrity, such that tracts supporting sensorimotor functions display higher integrity in relation to adversity exposure while tracts supporting cortico-cortical communication display lower integrity. Further, latent patterns of tract integrity linked with adversity experienced across preschool age and middle childhood (ages 4-9) were associated with trauma-related symptoms in adulthood. Our findings underscore that adversity exposure may differentially affect white matter in a function- and developmental-timing specific manner and suggest that adversity experienced between ages 4-9 may shape the development of global white matter tracts in ways that are relevant for adult mental health.

Adverse childhood experiences increase the risk for low perceived social participation and health-related quality of life in a large-scale population-based study in Germany

BACKGROUND

Adverse childhood experiences (ACEs) are highly prevalent and increase the risk for long-term adverse health outcomes. Next to well-known ACE-associated risks for morbidity, recent research is increasingly invested in exploring pathways towards health, overall functioning, and partaking in society following early adversity.

OBJECTIVES

Thus, this study aims to assess the association between latent classes of ACEs with perceived social participation and health-related Quality of Life (QoL) in a large population-based sample and to explore potential moderators of these associations.

METHOD

A representative sample of the German population (N = 2531; Mage = 48.7; 51 % women) was cross-sectionally investigated for ACEs, social participation (KsT-5), and health-related QoL (EuroQol-5D-5L). Latent Class Analysis (LCA) was performed to derive groups with similar ACE patterns. Multiple regression analyses were used to investigate the association of latent classes of ACEs with social participation and health-related QoL and to explore potential moderators.

RESULTS

Four distinct latent classes of ACEs were identified; "no/low ACEs" (N = 1968, 77.8 %); "household-dysfunction" (N = 259, 10.2 %), "child abuse and neglect" (N = 188, 7.4 %), and "polyadversity" (N = 116, 4.6 %). Compared to participants in the no/low ACE class, those in the ACE-exposed classes showed overall lower levels of perceived social participation and health-related QoL. The polyadversity class showed lower levels of social participation compared to the two other ACE-exposed classes. Chronic stress, living with a partner, education, current job/educational involvement, and gender were found to moderate these associations in exploratory analyses.

CONCLUSIONS

This study shows people exposed to ACEs to have a higher risk for lower perceived social participation and lower health-related QoL - an increased risk, however, is not a deterministic uninventable fortune. Reduction of chronic stress, fostering of social support, and educational and vocational paths as interventional targets are discussed to enable those with precarious starting conditions to partake in society.

Allostatic load in children: The cost of empathic concern

Early-life adversity affects long-term health outcomes but there is considerable interindividual variability in susceptibility to environmental influences. We proposed that positive psychological characteristics that reflect engagement with context, such as being concerned about people or performance on tasks (i.e., empathic concern), could moderate the interindividual variation in sensitivity to the quality of the early environment. We studied 526 children of various Asian nationalities in Singapore (46.6% female, 13.4% below the poverty line) with longitudinal data on perinatal and childhood experiences, maternal report on empathic concern of the child, and a comprehensive set of physiological measures reflecting pediatric allostatic load assessed at 6 y of age. The perinatal and childhood experiences included adversities and positive experiences. We found that cumulative adverse childhood experience was positively associated with allostatic load of children at 6 y of age at higher levels of empathic concern but not significantly associated at lower levels of empathic concern. This finding reveals evidence for the importance of empathic concern as a psychological characteristic that moderates the developmental impact of environmental influences, serving as a source for vulnerability to adversities in children.

The association of epigenetic age acceleration and depressive and anxiety symptom severity among children recently exposed to substantiated maltreatment

Child maltreatment is a major risk factor for both depressive and anxiety disorders. However, many children exposed to maltreatment never meet diagnostic threshold for either disorder while experiencing only transitory symptoms post-exposure. Recent research suggests DNA methylation adds predictive value in explaining variation in the onset and course of multiple psychiatric disorders following exposure to child maltreatment. Epigenetic age acceleration (EAA), the biological aging of cells not attributable to chronological aging, is a stress-sensitive biomarker capturing genome-wide variation in DNA methylation with the potential to identify children who have been maltreated at greatest risk for depressive and anxiety disorders. The current study examined two EAA clocks appropriate for the pediatric population, the Horvath and Pediatric Buccal Epigenetic (PedBE) clocks, and their associations with depressive and anxiety symptom severity following child maltreatment. Children (N = 71) 8-15 years of age, all of whom were exposed to substantiated child maltreatment in the 12 months prior to study entry, were enrolled. Risk modeling adjusting for several confounders revealed that EAA estimated via the Horvath clock was significantly associated with more severe depressive and anxiety symptoms. The PedBE clock was not associated with either depressive or anxiety symptom severity. Sensitivity analyses demonstrated that EAA via the Horvath clock robustly predicted depressive and anxiety symptom severity across multiple modeling scenarios. Our findings advance existing research suggesting EAA, as estimated with the Horvath clock, may be a promising biomarker for identifying children at greatest risk for more severe depressive and anxiety symptoms following maltreatment.

The age-varying effects of adolescent stress on impulsivity and sensation seeking

Adolescence is defined in part by heightened exposure and sensitivity to stressors. In a longitudinal cohort of youth at risk for substance use problems, we examined the age-varying relationship between stress exposure and traits that are central to the dual systems model. The positive associations between stress exposure, impulsivity, sensation seeking varied as function of age. Specifically, the influence of stress exposure on impulsivity strengthened during early adolescence and remained stable into early adulthood, while the influence of stress exposure on sensation seeking strengthened from early- to mid-adolescence and weakened thereafter. These findings suggest that the maturational imbalance between the capacity to regulate impulsive tendencies and sensation seeking may be exaggerated for youth who are exposed to a high number of stressors.

Stress, mental health and sociocultural adjustment in third culture kids: exploring the mediating roles of resilience and family functioning

Introduction

This cross-sectional study explores the contributions of personal and contextual factors in the adjustment process of a sample of internationally mobile children and adolescents having relocated to Switzerland. Based on evolutionary developmental theories and recommendations by Research Domain Criteria and The Hierarchical Taxonomy of Psychopathology theoretical frameworks, we hypothesized and tested a heuristic model of TCK adjustment, aiming to identify prevention and treatment targets tailored for our sampled population.

Methods

We assessed the relationships in the hypothesized models, particularly how perceived and acculturative stress influence TCK adjustment and whether the relationship between the predictors of TCK stress and the outcomes of TCK adjustment are mediated by resilience and family functioning. A total of 143 participants aged 7-17, having relocated internationally with their working parent(s), recruited in local and international schools in Switzerland, were included in this study. Data were collected using an online survey after we collected consent. We assessed factors of adjustment using validated questionnaires: perceived stress and acculturative stress and the potential mediating roles of family functioning and resilience. We measured the outcome of adjustment through mental health difficulties and sociocultural adjustment. We used path analysis to test the model.

Results

Results highlight the contributions of perceived stress and acculturative stress to TCK mental health and sociocultural adjustment. We also we found a mediation effect for resilience in the relationship between perceived stress and mental health. Family functioning was not a significant mediator in any relationship that we assessed.

Discussion

We discuss implications for future research, promoting TCK adjustment and preventative psychotherapeutic interventions.