Analysis of transcriptional changes in the immune system associated with pubertal development in a longitudinal cohort of children with asthma.

Puberty is an important developmental period marked by hormonal, metabolic and immune changes. Puberty also marks a shift in sex differences in susceptibility to asthma. Yet, little is known about the gene expression changes in immune cells that occur during pubertal development. Here we assess pubertal development and leukocyte gene expression in a longitudinal cohort of 251 children with asthma. We identify substantial gene expression changes associated with age and pubertal development. Gene expression changes between pre- and post-menarcheal females suggest a shift from predominantly innate to adaptive immunity. We show that genetic effects on gene expression change dynamically during pubertal development. Gene expression changes during puberty are correlated with gene expression changes associated with asthma and may explain sex differences in prevalence. Our results show that molecular data used to study the genetics of early onset diseases should consider pubertal development as an important factor that modifies the transcriptome.

Effects of daily peer problems on sleep and the severity of pediatric asthma symptoms.

OBJECTIVE: Although psychosocial stressors in the home environment place children at risk for physical health problems, less is known about whether or how peer stressors contribute to health problems in youth. The current study investigated associations between daily peer problems and asthma symptoms among adolescents with asthma. The possible mediating role of nightly sleep disturbance and the moderating role of adolescent mental health were also examined. METHOD: Adolescents (N = 297) with asthma reported on peer problems, nighttime awakenings, sleep quality, and asthma symptoms over 4 days. Youth also self-administered daily peak expiratory flow rate (PEFR) assessments, and parents reported on their children's anxious-depressive symptoms. RESULTS: Adolescents encountering more daily peer problems experienced more severe asthma symptoms, but not lower PEFR. Mediation analyses demonstrated that associations between daily peer problems and subjective asthma symptoms were partially explained by more nighttime awakenings and lower sleep quality, even after accounting for potentially confounding demographic factors and adolescents' daily experiences of familial stress. However, these indirect pathways did not vary depending on youth anxious-depressive symptoms. CONCLUSIONS: The findings provide novel evidence for everyday peer stress as a developmentally relevant health risk factor among adolescents with asthma. Insofar as daily peer problems were associated with elevated asthma symptoms via impaired sleep, psychosocial interventions focusing on the peer context may help mitigate maladaptive health behaviors and asthma morbidity. (PsycInfo Database Record (c) 2022 APA, all rights reserved).

Heroic Helping: The Effects of Priming Superhero Images on Prosociality.

Two experiments examined how exposure to superhero images influences both prosociality and meaning in life. In Experiment 1 (N = 246) exposed individuals to scenes with superhero images or neutral images. Individuals primed with superhero images reported greater helping intentions relative to the control group, which, in turn, were associated with increased meaning in life (indirect effect only; no direct effect). In Experiment 2 (N = 123), individuals exposed to a superhero poster helped an experimenter in a tedious task more than those exposed to a bicycle poster, though no differences were found for meaning in life. These results suggest that subtle activation of superhero stimuli increases prosocial intentions and behavior.