Effects of Acute Stress or Centrally Injected Interleukin-1beta on Neuropeptide Expression in the Immune System

Acute stress stimulates the expression and release of corticotropin-releasing hormone (CRH) and arginine vasopressin (AVP) from the hypothalamus, and the pro-opiomelanocortin products beta-endorphin and ACTH from the anterior pituitary. These neuropeptides are also expressed in immune tissues, and it has been proposed that they may modulate immune responses to stress through paracrine mechanisms. We subjected rats to restraint stress or central injection of interleukin (IL)-1beta to determine whether these acute stimuli can alter the expression of neuropeptides in the spleen and thymus. Restraint stress significantly increased the contents of all these neuropeptides in thymic, but not splenic, extracts. A single icv injection of IL-1beta increased contents of CRH, AVP, ACTH and beta-endorphin in the spleens of both sham-operated and adrenalectomised (ADX) rats. IL-1beta increased thymic contents of CRH and ACTH in sham-operated rats but these increases were not observed in ADX rats. These results suggest that the effects of IL-1beta on neuropeptide expression in the spleen are independent of glucocorticoids, whereas IL-1beta stimulation of neuropeptide expression in the thymus is dependent on circulating glucocorticoids. There were significant correlations between increases in CRH, ACTH and beta-endorphin in the spleen, and between CRH and ACTH in the thymus, consistent with the suggestion that IL-1beta-induced increases in ACTH and beta-endorphin may be mediated through CRH. These results provide evidence that stressors can directly influence neuropeptide expression in immune tissues. Thus stress may influence immune functions through paracrine mechanisms involving locally synthesised neuropeptides as well as through activation of the hypothalamo-pituitary-adrenal axis.     

Paying for positive group esteem: how inequity frames affect whites' responses to redistributive policies

This article finds that, when faced with racial inequity framed as White advantage, Whites' desire to think well of their racial group increases their support for policies perceived to harm Whites. Across 4 studies, the article provides evidence that (a) relative to minority disadvantage, White advantage increases Whites' support for policies perceived to reduce their group's economic opportunities, but does not increase support for policies perceived to increase minority opportunities; and (b) the effect of White advantage on Whites' esteem for their ingroup drives the effect of inequity frame on support for policies perceived to reduce Whites' opportunities.     

Self-stereotyping in the context of multiple social identities

This research examines self-stereotyping in the context of multiple social identities and shows that self-stereotyping is a function of stereotyped expectancies held in particular relationships. Participants reported how others evaluated their math and verbal ability and how they viewed their own ability when their gender or ethnicity was salient. Asian American women (Experiment 1) and European Americans (Experiment 2) exhibited knowledge of stereotyped social expectancies and corresponding self-stereotyping associated with their more salient identity. African Americans (Experiment 3) exhibited some knowledge of stereotyped social expectancies but no corresponding self-stereotyping. Correlational evidence and a 4th experiment suggest that self-stereotyping is mediated by the degree to which close others are perceived to endorse stereotypes as applicable to the self.     

Thanks, but no thanks: The role of personal responsibility in the experience of gratitude

Current theories of gratitude suggest that individuals feel grateful when they perceive someone else to be responsible for a desired outcome. However, it is unclear whether individuals must also feel a lack of personal responsibility in order to feel gratitude. This paper provides evidence that in achievement contexts, without the belief that they are responsible for their success, individuals do not experience gratitude, even when they acknowledge the help they have received. In two studies, the more helpful participants thought an experimenter had been, the more grateful they felt, but only if they also spontaneously felt responsible for (Study 1) or were induced to feel responsible for (Study 2) their outcomes.     

Anxiety, Sensory Over-Responsivity, and Gastrointestinal Problems in Children with Autism Spectrum Disorders

Children with autism spectrum disorders (ASD) experience high rates of anxiety, sensory processing problems, and gastrointestinal (GI) problems; however, the associations among these symptoms in children with ASD have not been previously examined. The current study examined bivariate and multivariate relations among anxiety, sensory over-responsivity, and chronic GI problems in a sample of 2,973 children with ASD enrolled in the Autism Treatment Network (ages 2–17 years, 81.6 % male). Twenty-four percent of the sample experienced at least one type of chronic GI problem (constipation, abdominal pain, bloating, diarrhea, and/or nausea lasting three or more months). Children with each type of GI problem had significantly higher rates of both anxiety and sensory over-responsivity. Sensory over-responsivity and anxiety were highly associated, and each provided unique contributions to the prediction of chronic GI problems in logistic regression analyses. The results indicate that anxiety, sensory over-responsivity and GI problems are possibly interrelated phenomenon for children with ASD, and may have common underlying mechanisms.     

Awareness and Preferences Regarding <Emphasis Type="Italic">BRCA1/2</Emphasis> Genetic Counseling and Testing Among Latinas and Non-Latina White Women at Increased Risk for Hereditary Breast and Ovarian Cancer

This study was an investigation of awareness, cognitions, and psychosocial and educational needs related to genetic counseling and testing among Latinas and non-Latina whites at increased risk for having a BRCA1/2 mutation. Sixty-three Latina and eighty-four non-Latina white women completed telephone surveys employing a mixture of quantitative and qualitative questions assessing awareness, benefits, risks, barriers, and genetic counseling communication preferences regarding BRCA1/2 testing. Among participants who had not previously had genetic counseling/testing, 56.9% of Latinas (29/51) and 34.8% of non-Latina white participants (24/69) were unaware of the availability of BRCA1/2 testing. In multivariate logistic regression analysis, Latina ethnicity was the only statistically significant independent factor associated with lack of awareness (OR = 0.42; 95% CI = 0.19–0.35). No appreciable differences were noted between ethnic groups regarding perceived benefits of BRCA1/2 testing or desired genetic counseling topics. These findings underscore the importance of increasing awareness of cancer genetic counseling and genetic testing among both Latina and non-Latina white populations.     

Temptation Bias: Can Self-enhancement Limit the Influence of Gender Stereotypes?

Temptation bias is the tendency to see oneself as better than others at resisting temptation. To understand the influence of self-enhancement and gender stereotypes on temptation bias, 215 undergraduates from a university located in the southwest region of the United States compared their ability to resist ten sexually tempting scenarios to that of others in general, and to their romantic partner (Study 1). An additional 151 undergraduates from the same university rated their own or their partner’s ability to resist seven sexually tempting scenarios compared to other men and women (Study 2). Results revealed that temptation bias was present but reduced when romantic partners were the comparison targets; and when comparing themselves to others, women displayed temptation bias regardless of the gender of the referent while men displayed temptation bias only when comparing themselves to men.