Biomedical subjects

D G Cruess

Publications and source records attributed to D G Cruess.

10 recordsLinked to original sources

PubMed2001

Psychosocial-immune relationships in HIV disease.

Human immunodeficiency virus (HIV) is now commonly viewed as a chronic disease, which often consists of a wide array of recurrent and sometimes severe psychosocial stressors. An individual's response to these multiple challenges over time may impact their health. In this article, we review research examining the relationship of psychologic factors (eg, depression, stressful life events, coping, social support) with immune system function and disease course. We also explore some of the potential physiologic pathways that may underlie these types of psychosocial-immune relationships, as well as the effects of psychologic interventions, particularly cognitive-behavioral stress management (CBSM), on the psychosocial, neuroendocrine, and immune functioning of people living with HIV. We conclude by suggesting some areas for future research, particularly the study of HIV-positive women.

Adaptation, Psychological↗

PubMed2000

Cognitive-behavioral stress management reduces distress and 24-hour urinary free cortisol output among symptomatic HIV-infected gay men.

BACKGROUND: Stress management interventions can reduce symptoms of distress as well as modulate certain immune system components in persons infected with human immunodeficiency virus (HIV). These effects may occur in parallel with reductions in hypothalamic-pituitary-adrenal (HPA) axis hormones such as cortisol, which has been related in other work to a down-regulation of immune system components relevant to HIV infection. The present study tested the effects of a multimodal cognitive-behavioral stress management (CBSM) intervention on 24-hour urinary free cortisol levels and distressed mood in symptomatic HIV+ gay men. METHODS: Symptomatic HIV-infected gay men who were randomized to either a 10-week group-based CBSM intervention or a 10-week wait-list period provided psychological responses and urine samples pre-post intervention. RESULTS: Of the 59 participants providing matched questionnaire data, men assigned to CBSM (n = 40) showed significantly lower posttreatment levels of self-reported depressed affect, anxiety, anger, and confusion than those in the wait-list control group (n = 19). Among the 47 men providing urine samples (34 CBSM, 13 controls), those assigned to CBSM revealed significantly less cortisol output as compared to controls. At the individual level, depressed mood decreases paralleled cortisol reductions over this period across the entire sample. CONCLUSION: A time-limited CBSM intervention reduced distress symptoms and urinary free cortisol output in symptomatic HIV+ gay men and greater reductions in some aspects of distress, especially depressed mood, paralleled greater decreases in cortisol over the intervention period. If persisting stressors and depressed mood contribute to chronic HPA axis activation in HIV-infected persons, then interventions such as CBSM, which teaches them to relax, alter cognitive appraisals, use new coping strategies, and access social support resources, may decrease distress and depressed mood and normalize HPA axis functioning.

Adult↗

PubMed2000

Reductions in salivary cortisol are associated with mood improvement during relaxation training among HIV-seropositive men.

This study examined salivary cortisol and mood during relaxation training in 30 symptomatic, HIV+ gay men participating in a 10-week, group-based cognitive-behavioral stress management intervention. Cortisol levels and mood were assessed within these sessions just before and after 45-min relaxation exercises given as part of each session. Participants also recorded their stress level and compliance with daily home relaxation practice. Presession cortisol levels decreased across the 10-week period and were related to decreases in global measures of total mood disturbance and anxious mood. Reductions in presession cortisol levels were also associated with decreases in self-reported stress level during home practice. Greater reductions in cortisol during the first three sessions were associated with more frequent relaxation practice at home. These findings suggest that salivary cortisol represents an objective neuroendocrine marker for changes in anxiety and distress observed during relaxation training in symptomatic, HIV-seropositive men.

Adolescent↗

PubMed2000

Cognitive-behavioral stress management intervention effects on anxiety, 24-hr urinary norepinephrine output, and T-cytotoxic/suppressor cells over time among symptomatic HIV-infected gay men.

The present study tested the effects of a multimodal cognitive-behavioral stress management (CBSM) intervention on anxious mood, perceived stress, 24-hr urinary catecholamine levels, and changes in T-lymphocyte subpopulations over time in symptomatic HIV+ gay men. Seventy-three men were randomized to either a group-based CBSM intervention (n = 47) or a wait-list control (WLC) condition (n = 26). Men assigned to CBSM showed significantly lower posttreatment levels of self-reported anxiety, anger, total mood disturbance, and perceived stress and less norepinephrine (NE) output as compared with men in the WLC group. At the individual level, anxiety decreases paralleled NE reductions. Significantly greater numbers of T-cytotoxic/suppressor (CD3+CD8+) lymphocytes were found 6 to 12 months later in those assigned to CBSM. Moreover, greater decreases in NE output and a greater frequency of relaxation home practice during the 10-week CBSM intervention period predicted higher CD3+CD8+ cell counts at follow-up.

Adaptation, Psychological↗

PubMed2000

Cognitive-behavioral stress management increases free testosterone and decreases psychological distress in HIV-seropositive men.

The effects of a 10-week group-based cognitive-behavioral stress management (CBSM) intervention on psychological distress and plasma free testosterone in symptomatic, HIV-seropositive men were examined. Participants were randomized to either CBSM (n = 42) or a wait-list control group (n = 23). Men in the CBSM intervention showed significant increases in testosterone, whereas control participants showed significant decreases. Those participating in CBSM had significant distress reductions, whereas controls showed no such change. Alterations in free testosterone were inversely related to changes in distress states over time, independent of any changes in cortisol. These findings demonstrate that a short-term CBSM intervention increases free testosterone levels among symptomatic, HIV-seropositive men, and alterations in free testosterone are associated with changes in psychological distress observed during CBSM.

Adult↗

PubMed1999

Changes in self-efficacy and decisional balance for exercise among obese women in a weight management program.

OBJECTIVE: To assess changes in eating and exercise self-efficacy and decisional balance for exercise in an obese population enrolled in a multi-disciplinary weight management program. RESEARCH METHOD AND PROCEDURES: Thirty-two obese women were assessed at entry and after 12 weeks of treatment. RESULTS: Participants showed 15% mean weight loss after 12 weeks of treatment. Mean minutes of self-reported exercise increased by 229%. Participants demonstrated significant improvements in self-efficacy for both eating and exercise and health parameters but not in decisional balance for exercise adoption. DISCUSSION: These results may have implications for the practitioner in that self-efficacy changes occur during successful weight loss, but decisional balance for exercise may not change until individuals enter maintenance. These results imply that practitioners may be advised to shift from confidence building to relapse prevention early on in treatment, and that focusing on strengthening the pros of exercise and reducing the cons of exercise may need to remain constant during treatment.

Adult↗

PubMed1999

Cognitive-behavioral stress management buffers decreases in dehydroepiandrosterone sulfate (DHEA-S) and increases in the cortisol/DHEA-S ratio and reduces mood disturbance and perceived stress among HIV-seropositive men.

This study examined the effects of a 10-week cognitive-behavioral stress management (CBSM) intervention on dehydroepiandrosterone sulfate (DHEA-S) levels and the ratio of cortisol to DHEA-S (cortisol/DHEA-S), potential surrogate adrenal markers of HIV disease progression, in relation to alterations in mood and distress. HIV-seropositive men were randomized to either a group-based CBSM intervention (n = 43) or to a wait-list control group (n = 24), with both hormonal and distress measures assessed just prior to and immediately following the 10-week period. Results showed that CBSM buffers decreases in DHEA-S and increases in the cortisol/DHEA-S ratio. Further examination also revealed that changes in the cortisol/DHEA-S ratio were significantly and positively related to changes in total mood disturbance and perceived stress over time. These findings demonstrate that a short-term CBSM intervention can buffer against decrements in DHEA-S and increments in the cortisol/DHEA-S ratio among symptomatic, HIV-positive men, and that alterations in the cortisol/DHEA-S ratio move in concert with changes in mood and distress observed during CBSM.

Adolescent↗

PubMed1999

Music therapy increases serum melatonin levels in patients with Alzheimer's disease.

CONTEXT: Music therapy is known to have healing and relaxing effects. Although these effects appear to be mediated by release of neurotransmitters and neurohormones, the specific neurohormonal systems involved have not been fully investigated. OBJECTIVE: To assess the effects of a music therapy intervention on concentrations of melatonin, norepinephrine, epinephrine, serotonin, and prolactin in the blood of a group of patients with Alzheimer's disease. DESIGN: Blood samples were obtained before initiating the therapy, immediately at the end of 4 weeks of music therapy sessions, and at 6 weeks follow-up after cessation of the sessions. SETTING: Miami Veterans Administration Medical Center, Miami, Fla. PATIENTS: 20 male inpatients with Alzheimer's disease. INTERVENTION: 30- to 40-minute morning sessions of music therapy 5 times per week for 4 weeks. MAIN OUTCOME MEASURES: Changes in melatonin, norepinephrine, epinephrine, serotonin, and prolactin following music therapy. RESULTS: Melatonin concentration in serum increased significantly after music therapy and was found to increase further at 6 weeks follow-up. A significant increase was found between baseline values and data recorded after the music therapy sessions as well as at 6 weeks follow-up. Norepinephrine and epinephrine levels increased significantly after 4 weeks of music therapy, but returned to pretherapy levels at 6 weeks follow-up. Serum concentration of prolactin and platelet serotonin levels remained unchanged after 4 weeks of music therapy and at 6 weeks follow-up. CONCLUSION: Increased levels of melatonin following music therapy may have contributed to patients' relaxed and calm mood.

Aged↗

PubMed1998

Cognitive-behavioral intervention effects on mood and cortisol during exercise training.

The purpose of the present study was to assess the effect of a time limited cognitive-behavioral stress management program (CBSM) on mood state and serum cortisol among men and women rowers (N = 34) undergoing a period of heavy exercise training. After controlling for life-event stress (LES), CBSM was hypothesized to reduce negative mood state and cortisol among rowers during a period of heavy training; mood and cortisol changes over the intervention period were hypothesized to be positively correlated. LES was positively associated with negative affect at study entry. After covariance for LES, rowing athletes randomly assigned to the CBSM group experienced significant reductions in depressed mood, fatigue, and cortisol when compared to those randomized to a control group. Decreases in negative affect and fatigue were also significantly associated with cortisol decrease. These results suggest that CBSM may exert a positive effect on athletes' adaptation to heavy exercise training.

Adolescent↗

PubMedDate not supplied

Cognitive-behavioral stress management reduces serum cortisol by enhancing benefit finding among women being treated for early stage breast cancer.

OBJECTIVE: This study examined the effects of a cognitive-behavioral stress management (CBSM) group intervention on serum cortisol levels in women being treated for stage I or II breast cancer. METHODS: Participants were randomly assigned to undergo a 10-week intervention (N = 24) within 8 weeks after surgery or were placed on a waiting list (N = 10). Cortisol was assessed by means of a radioimmunoassay of blood samples collected at the same time of day just before the start of the intervention and immediately after its completion. The women also reported the degree to which breast cancer had made positive contributions to their lives. RESULTS: Intervention participants showed increased benefit finding and reduced serum cortisol levels, whereas control subjects experienced neither change. Path analysis suggested that the effect of CBSM on cortisol was mediated by increases in benefit finding. CONCLUSIONS: These findings suggest that positive growth enhanced during a time-limited intervention can influence physiological parameters such as cortisol among women with early stage breast cancer.

Adaptation, Psychological↗