The Modification of Offspring Stress-Related Behavior and the Expression of Drd1, Drd2, and Nr3c1 by a Western-Pattern Diet in Mus Musculus.

The impact of early developmental experience on neurobiological pathways that may contribute to the association between diet and behavior have not yet been elucidated. The focus of the current study was to determine whether the impact of prenatal stress (PS) could be mitigated by a diet that stimulates the same neuroendocrine systems influenced by early stress, using a mouse model. Behavioral and genetic approaches were used to assess how a Western-pattern diet (WPD) interacts with PS and sex to impact the expression of anxiety-like behavior in an open-field arena, as well as the expression of the glucocorticoid receptor in the hippocampus, D1 dopamine receptors in the nucleus accumbens, and D2 dopamine receptors in the ventral tegmental area. Overall, the results demonstrated that a prenatal WPD mitigates the effects of maternal stress in dams and offspring. These results help to elucidate the relationship between pre- and post-natal nutrition, gene expression, and behaviors that lead to long-term health effects.

Role of Organic Cation Transporter 3 and Plasma Membrane Monoamine Transporter in the Rewarding Properties and Locomotor Sensitizing Effects of Amphetamine in Male andFemale Mice.

A lack of effective treatment and sex-based disparities in psychostimulant addiction and overdose warrant further investigation into mechanisms underlying the abuse-related effects of amphetamine-like stimulants. Uptake-2 transporters such as organic cation transporter 3 (OCT3) and plasma membrane monoamine transporter (PMAT), lesser studied potential targets for the actions of stimulant drugs, are known to play a role in monoaminergic neurotransmission. Our goal was to examine the roles of OCT3 and PMAT in mediating amphetamine (1 mg/kg)-induced conditioned place preference (CPP) and sensitization to its locomotor stimulant effects, in males and females, using pharmacological, decynium-22 (D22; 0.1 mg/kg, a blocker of OCT3 and PMAT) and genetic (constitutive OCT3 and PMAT knockout (-/-) mice) approaches. Our results show that OCT3 is necessary for the development of CPP to amphetamine in males, whereas in females, PMAT is necessary for the ability of D22 to prevent the development of CPP to amphetamine. Both OCT3 and PMAT appear to be important for development of sensitization to the locomotor stimulant effect of amphetamine in females, and PMAT in males. Taken together, these findings support an important, sex-dependent role of OCT3 and PMAT in the rewarding and locomotor stimulant effects of amphetamine.

The Family Biorhythm: Contributions of the HPA and HPG Axes to Neuroendocrine Attunement.

Objective: The vast majority of research on biobehavioral influences on development has focused on mothers and infants, whereas research on paternal biobehavioral influences remains sparse. This study aims to increase understanding of paternal influences on the biobehavioral dynamics of the family unit, using a multi-system approach. Methods: Participants consisted of 32 predominantly high-risk families recruited during pregnancy who completed monthly questionnaires and in-home visits when infants were 4, 12, and 18 months of age. In-home visits included semi-structured interaction tasks and saliva samples for cortisol and progesterone assays. Results: Mothers and infants, but not fathers and infants, showed adrenocortical attunement, with the strongest attunement at 18 months. Second, mothers' couple satisfaction did not significantly impact infants' cortisol levels or mother-infant cortisol attunement, but mothers' progesterone moderated the relationship between couple satisfaction and infant cortisol levels such that mothers with low couple satisfaction, but high progesterone, had infants with lower cortisol levels. Finally, mothers' and fathers' progesterone levels were attuned across the time points. Conclusions: This is some of the first evidence of the establishment of the family biorhythm and suggests that fathers play an indirect role in facilitating mother-infant adrenocortical attunement. Supplementary Information: The online version contains supplementary material available at 10.1007/s40750-023-00215-0.

Exposure to a sex-specific stressor mitigates sex differences in stress-induced eating.

Literature suggests that stress-induced consumption of highly palatable food is a behavior pertaining almost exclusively to women. Given the overall association between stress levels and obesity in the United States transcends sex, it seems likely that males also engage in stress-induced consumption of highly palatable food in certain contexts. In the current study, 168 males and females (54.2% female) were randomly assigned to one of three experimental groups: achievement stress, social rejection stress, and a control condition. Stress was measured with cortisol and respiratory sinus arrhythmia (RSA) reactivity. Post stressor food consumption was measured by weighing several categories of food (highly palatable (sweet, salty), nutritious sweet, nutritious non-sweet, and bland) before and after the participant was introduced to the food items. Males demonstrated greater parasympathetic withdrawal and cortisol reactivity in the achievement condition than females; whereas females demonstrated greater parasympathetic withdrawal and cortisol reactivity in the social rejection condition than males. There were no significant differences in parasympathetic withdrawal between males and females in the control condition. Post-stressor highly palatable food consumption followed this trend. While there was no main effect for sex on the amount of post-stressor highly palatable food consumed, there was a significant main effect for condition and an interaction effect for sex and condition on the amount of post-stressor highly palatable food consumed. Our results challenge the prevailing notion that stress-induced eating of hyper palatable food is mainly found among women by finding that males also engage in such behavior if their experience leads to an adequate stress response.