The impact of family asthma management on biology: a longitudinal investigation of youth with asthma.

This study examined longitudinal associations of asthma management-related beliefs and behaviors with changes in asthma-relevant biological markers in a sample of 43 children with asthma. Children (M age = 12.4, 75% male) and parents were interviewed about asthma management beliefs and behaviors. Asthma outcomes included lung function (FEV(1)%), eosinophil counts, and daily cortisol measured at two time points, 18 months apart. Children with a less sophisticated disease belief (termed the "no symptoms, no asthma" belief) displayed eosinophil counts that increased over time, controlling for baseline levels. Poorer family asthma management was associated with increasing eosinophil counts over time. Poorer child asthma management was associated with cortisol output that declined over time. Further, families who reported poorer collaboration with their physician had children who displayed worsening lung function over time. These findings suggest that interventions aimed at teaching families better asthma management approaches and more accurate disease beliefs may have the potential to alter biological profiles in children with asthma.

The role of asthma management beliefs and behaviors in childhood asthma immune and clinical outcomes.

OBJECTIVE: This study examined associations of asthma management-related beliefs and behaviors with immune markers and clinical outcomes in a sample of 66 children with asthma (ages 9-18 years). METHODS: Children and parents were interviewed about asthma management beliefs and behaviors. Immune measures included stimulated production of cytokines implicated in asthmatic airway inflammation, eosinophil counts, and IgE levels. Clinical outcomes included pulmonary function, symptoms, beta-agonist use, and physician contacts. RESULTS: Children's reports of greater conceptual understanding of asthma, parents' reports of quicker responses to asthma symptoms, and children's and parents' reports of more balanced integration of asthma into daily life were all associated with reduced inflammatory profiles. Inflammatory profiles were found to be a statistically significant pathway linking asthma beliefs and behaviors to clinical outcomes. CONCLUSIONS: These findings suggest that interventions aimed at teaching families better asthma management approaches may have the potential to alter biological profiles in children with asthma.

ERalpha, but not ERbeta, mediates the expression of sexual behavior in the female rat.

Estrogen has well known effects on sexual behavior, however the role of the estrogen receptors (ER) alpha and beta on sexual behavior remains to be fully determined. This study investigated the individual and co-operative involvement of ERalpha and beta on sexual behaviors in the adult female rat. Subtype selective ER agonists, propyl-pyrazole triol (PPT; ERalpha agonist) and diarylpropionitrile (DPN; ERbeta agonist) were utilized to examine each receptor subtype's contribution, individual and co-operative, for both receptive (lordosis) and proceptive (hopping/darting, 'ear wiggling') female sexual behaviors. Ovariectomized female rats received subcutaneous injections of either: sesame oil (OIL), dimethylsulfoxide (DMSO), estradiol benzoate (EB; 10 microg/0.1 ml OIL), one of three doses of the ERalpha agonist PPT (1.25mg, 2.5mg or 5.0mg/0.1 ml DMSO), one of three doses of the ERbeta agonist DPN (1.25mg, 2.5mg or 5.0mg/0.1 ml DMSO) or a combination dose of PPT and DPN (2.5mg PPT+2.5mg DPN/0.1 ml DMSO) for two consecutive days, 48 and 24h prior to testing followed by a progesterone injection (500 microg/0.1 ml OIL) 4h prior to testing in order to elicit sexual behavior. The ERalpha agonist PPT, but not the ERbeta agonist DPN, elicited both proceptive and receptive behavior. PPT at doses of 2.5 and 5.0mg significantly elicited lordosis and proceptive behavior ('ear wiggling', hopping and darting). Intriguingly, the administration of both agonists together at the 2.5mg dose resulted in reduced levels of proceptivity and receptivity, suggesting that ERbeta modulates ERalpha's ability to elicit receptive and proceptive sexual behavior.

Socioeconomic status and inflammatory processes in childhood asthma: the role of psychological stress.

BACKGROUND: Although social environment variables such as socioeconomic status (SES) have been linked to childhood asthma, little is known about the psychobiological mechanisms underlying this relationship. OBJECTIVES: The goal of this study was to investigate relationships among SES, psychological stress, and immune processes implicated in asthma. METHODS: Thirty-seven children ages 9 to 18 years, physician-diagnosed with asthma, and 39 healthy children participated. Families were interviewed about chronic life stress, perceptions of threat, and SES. Blood samples were drawn from children to assess stimulated production of cytokines implicated in asthma (IL-4, IL-5, IL-13) and eosinophil counts. RESULTS: In children with asthma, lower SES was associated with heightened production of IL-5 and IL-13 and higher eosinophil counts (P values < .05). Lower SES also was associated with higher chronic stress and perceived threat (both groups: P values < .05). Higher levels of stress and threat perception were associated with heightened production of IL-5 and IL-13, and higher eosinophil counts in children with asthma (P values < .05). Statistical mediation tests revealed that chronic stress and threat perception represented statistically significant pathways between SES and immune processes in children with asthma (P values < .05). In healthy children, associations were in the opposite direction from the asthma group, though generally not significant. CONCLUSION: This is one of the first studies to document empirically a psychobiological explanation for the epidemiologic relationship between low SES and poor asthma outcomes. CLINICAL IMPLICATIONS: Associations among SES, psychological stress, and immune pathways suggest that the experience of stress, particularly among lower SES children, has implications for childhood asthma morbidity.