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1.
Proc Natl Acad Sci U S A ; 121(19): e2318128121, 2024 May 07.
Artigo em Inglês | MEDLINE | ID: mdl-38687795

RESUMO

Childhood maltreatment has been linked to adult somatic symptoms, although this has rarely been examined in daily life. Furthermore, the localization of somatization associated with childhood maltreatment and its subtypes is unknown. This large-scale experience sampling study used body maps to examine the relationships between childhood maltreatment, its subtypes, and the intensity and location of negative somatic sensations in daily life. Participants (N = 2,234; 33% female and 67% male) were part of MyBPLab 2.0, a study conducted using a bespoke mobile phone application. Four categories of childhood maltreatment (emotional abuse, emotional neglect, physical abuse, and physical neglect) were measured using the Childhood Trauma Questionnaire. Using gender-matched human silhouettes, participants indicated the location and intensity of feelings of negative activation in the body. Childhood maltreatment generally and its four measured subtypes were all positively associated with heightened negative activation on both the front and back body maps. For females, total childhood maltreatment was associated with negative activation in the abdomen and lower back, while for males, the association was localized to the lower back. Similarly, each of the four subscales had localized associations with negative activation in the abdomen and lower back in females and lower back in males, except for emotional abuse, which was also associated with negative activation in the abdomen in males. These associations likely reflect increased somatization in individuals exposed to childhood maltreatment, suggesting a role for psychotherapeutic interventions in alleviating associated distress.


Assuntos
Sintomas Inexplicáveis , Humanos , Feminino , Masculino , Adulto , Transtornos Somatoformes/psicologia , Transtornos Somatoformes/etiologia , Maus-Tratos Infantis/psicologia , Inquéritos e Questionários , Criança , Pessoa de Meia-Idade , Sobreviventes Adultos de Maus-Tratos Infantis/psicologia , Adulto Jovem
2.
Psychol Rev ; 131(1): 247-270, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38147050

RESUMO

Engaging in contemplative practice like meditation, yoga, and prayer, is beneficial for psychological and physical well-being. Recent research has identified several underlying psychological and biological pathways that explain these benefits. However, there is not yet consensus on the underlying overlapping physiological mechanisms of contemplative practice benefits. In this article, we integrate divergent scientific literatures on contemplative practice interventions, stress science, and mitochondrial biology, presenting a unified biopsychosocial model of how contemplative practices reduce stress and promote physical health. We argue that engaging in contemplative practice facilitates a restorative state termed "deep rest," largely through safety signaling, during which energetic resources are directed toward cellular optimization and away from energy-demanding stress states. Our model thus presents a framework for how contemplative practices enhance positive psychological and physiological functioning by optimizing cellular energy consumption. (PsycInfo Database Record (c) 2024 APA, all rights reserved).


Assuntos
Meditação , Yoga , Humanos , Meditação/psicologia
3.
BMJ Open ; 13(11): e072957, 2023 11 06.
Artigo em Inglês | MEDLINE | ID: mdl-37931968

RESUMO

PURPOSE: The National Heart, Lung and Blood Institute Growth and Health Study (NGHS) prospectively collected anthropometric, biospecimens, clinical, health behaviour and psychosocial measures associated with cardiovascular disease from childhood to young adulthood. The aim of the current study was to assess the impact of stress, dysregulated eating and social genomic biomarkers on cardiometabolic risk factors among the original participants now in midlife and their children. PARTICIPANTS: Beginning in 1987-1988, NGHS recruited black and white girls (age 9-10 years) from socioeconomically diverse backgrounds from from three sites: Cincinnati, Ohio; Washington, DC; and Western Contra Costa County, California (N=2379) and followed them for 10 years. The study maintained an 89% retention rate. The current study is 30 years after the start of the original study and focused on the participants of California (n=887) and their children aged 2-17 years. We re-enrolled 624 of 852 eligible participants (73%): 49.2% black and 50.8% white. The mean age was 39.5 years. Among the 645 eligible biological children, 553 were enrolled; 49% black and 51% white, with 51.5% girls and 48.5% boys. The mean age was 9.3 years. FINDINGS TO DATE: Longitudinal analysis of adolescent drive for thinness predicted higher scores for drive for thinness during midlife, which was indirectly associated with greater adult body mass index through adult drive for thinness. Latent trajectory modelling of adolescent growth over 10 years found that women with persistently high weight trajectory had twice the odds of having children who met the definition for obesity compared with the persistently normal group, adjusting for adult weight. FUTURE PLANS: New studies on neighbourhood socioeconomic status, food insecurity and additional biomarkers of chronic stress, microbiome and accelerated ageing (ie, telomere length and epigenetic clock) are underway. We are developing a 10-year follow-up to understand changes in ageing biomarkers of the participants and their children. TRIAL REGISTRATION NUMBER: NCT00005132.


Assuntos
Envelhecimento , Doenças Cardiovasculares , Fatores de Risco de Doenças Cardíacas , Adolescente , Adulto , Criança , Pré-Escolar , Feminino , Humanos , Masculino , Adulto Jovem , Biomarcadores , Índice de Massa Corporal , California , Doenças Cardiovasculares/epidemiologia , Estudos Longitudinais , Fatores de Risco , Magreza/psicologia , Brancos , Negro ou Afro-Americano
4.
Psychoneuroendocrinology ; 150: 106031, 2023 04.
Artigo em Inglês | MEDLINE | ID: mdl-36801587

RESUMO

Salivary cortisol stress biomarkers have been extensively used in epidemiological work to document links between stress and ill health. There has been little effort to ground field friendly cortisol measures in the hypothalamic-pituitary-adrenal (HPA) axis regulatory biology that is likely relevant to delineating mechanistic pathways leading from stress exposure to detrimental health outcomes. Here, we utilized a healthy convenience sample (n = 140) to examine normal linkages between extensively collected salivary cortisol measures and available laboratory probes of HPA axis regulatory biology. Participants provided 9 saliva samples per day over 6 days within a month, while engaging in usual activities, and also participated in 5 regulatory tests (adrenocorticoptripin stimulation, dexamethasone/corticotropin-releasing-hormone stimulation, metyrapone, dexamethasone suppression, and Trier Social Stress Test). Logistical regression was used to test specific predictions linking cortisol curve components to regulatory variables and to explore widely for non-predicted associations. We found support for 2 of 3 original hypotheses, showing associations (1) between cortisol diurnal decline and feedback sensitivity as measured by dexamethasone suppression, and (2) between morning cortisol levels and adrenal sensitivity. We did not find links between central drive (metyrapone test) and end of day salivary levels. We confirmed an a priori expectation of limited linkage between regulatory biology and diurnal salivary cortisol measures, beyond those predicted. These data support an emerging focus on measures related to diurnal decline in epidemiological stress work. They raise questions about the biological meaning of other curve components, including morning cortisol levels, and perhaps CAR (Cortisol Awakening Response). If morning cortisol dynamics are linked to stress, more work on adrenal sensitivity in stress adaptation and stress-health links may be warranted.


Assuntos
Hidrocortisona , Sistema Hipotálamo-Hipofisário , Humanos , Hidrocortisona/metabolismo , Sistema Hipotálamo-Hipofisário/metabolismo , Sistema Hipófise-Suprarrenal/metabolismo , Metirapona , Ritmo Circadiano/fisiologia , Saliva/metabolismo , Dexametasona/metabolismo , Biologia
5.
Psychol Med ; 53(13): 6171-6182, 2023 10.
Artigo em Inglês | MEDLINE | ID: mdl-36457292

RESUMO

BACKGROUND: Although maternal stressor exposure has been associated with shorter telomere length (TL) in offspring, this literature is based largely on White samples. Furthermore, timing of maternal stressors has rarely been examined. Here, we examined how maternal stressors occurring during adolescence, pregnancy, and across the lifespan related to child TL in Black and White mothers. METHOD: Mothers (112 Black; 110 White; Mage = 39) and their youngest offspring (n = 222; Mage = 8) were part of a larger prospective cohort study, wherein mothers reported their stressors during adolescence (assessed twice during adolescence for the past year), pregnancy (assessed in midlife for most recent pregnancy), and across their lifespan (assessed in midlife). Mother and child provided saliva for TL measurement. Multiple linear regression models examined the interaction of maternal stressor exposure and race in relation to child TL, controlling for maternal TL and child gender and age. Race-stratified analyses were also conducted. RESULTS: Neither maternal adolescence nor lifespan stressors interacted with race in relation to child TL. In contrast, greater maternal pregnancy stressors were associated with shorter child TL, but this effect was present for children of White but not Black mothers. Moreover, this effect was significant for financial but not social pregnancy stressors. Race-stratified models revealed that greater financial pregnancy stressors predicted shorter telomeres in offspring of White, but not Black mothers. CONCLUSIONS: Race and maternal stressors interact and are related to biological aging across generations, but these effects are specific to certain races, stressors, and exposure time periods.


Assuntos
Mães , Encurtamento do Telômero , Adolescente , Adulto , Criança , Feminino , Humanos , Gravidez , Exposição Materna , Mães/psicologia , Estudos Prospectivos , Telômero/fisiologia , Encurtamento do Telômero/fisiologia , População Branca/psicologia , Relação entre Gerações/etnologia , Negro ou Afro-Americano/psicologia , Adulto Jovem , Pessoa de Meia-Idade
6.
Stress ; 24(6): 822-832, 2021 11.
Artigo em Inglês | MEDLINE | ID: mdl-34060408

RESUMO

Glucocorticoids exert profound effects on the brain and behavior, but cortisol concentrations are rarely linked to subjectively reported emotional states in humans. This study examined whether the link between cortisol and subjective anxiety varied by childhood maltreatment history. To do this, 97 individuals (60.8% female) participated in a standardized stress task in the laboratory (Trier Social Stress Test, TSST) while providing serial ratings of their feelings of anxiety as well as cortisol samples in blood. These measurements were collected nine times across the laboratory visit, from immediately before the TSST to 65 minutes after stress initiation. We estimated the within-person association between cortisol concentrations and momentary feelings of anxiety for individuals with and without exposure to childhood maltreatment, measured via self-report on the Childhood Trauma Questionnaire (CTQ). Individuals exposed to maltreatment during childhood reported the greatest feelings of anxiety when cortisol concentrations were lowest. This pattern was exaggerated among female participants, those with posttraumatic stress disorder (PTSD), and those exposed to emotional neglect relative to other forms of maltreatment. Early life adversity, such as parental maltreatment, may alter the role of cortisol in affective experiences. This observation may provide preliminary, translational evidence of a novel pathway through which stress may lead to and maintain internalizing symptoms in humans. More studies accounting for the moderating role of childhood maltreatment in biobehavioral pathways are needed.


Assuntos
Sobreviventes Adultos de Maus-Tratos Infantis , Maus-Tratos Infantis , Sobreviventes Adultos de Maus-Tratos Infantis/psicologia , Transtornos de Ansiedade , Criança , Feminino , Humanos , Hidrocortisona/metabolismo , Masculino , Estresse Psicológico/psicologia
7.
Psychol Med ; : 1-10, 2021 Mar 26.
Artigo em Inglês | MEDLINE | ID: mdl-33766171

RESUMO

BACKGROUND: Childhood trauma (CT) increases the risk of adult depression. Buffering effects require an understanding of the underlying persistent risk pathways. This study examined whether daily psychological stress processes - how an individual interprets and affectively responds to minor everyday events - mediate the effect of CT on adult depressive symptoms. METHODS: Middle-aged women (N = 183) reported CT at baseline and completed daily diaries of threat appraisals and negative evening affect for 7 days at baseline, 9, and 18 months. Depressive symptoms were measured across the 1.5-year period. Mediation was examined using multilevel structural equation modeling. RESULTS: Reported CT predicted greater depressive symptoms over the 1.5-year time period (estimate = 0.27, s.e. = 0.07, 95% CI 0.15-0.38, p < 0.001). Daily threat appraisals and negative affect mediated the effect of reported CT on depressive symptoms (estimate = 0.34, s.e. = 0.08, 95% CI 0.22-0.46, p < 0.001). Daily threat appraisals explained more than half of this effect (estimate = 0.19, s.e. = 0.07, 95% CI 0.08-0.30, p = 0.004). Post hoc analyses in individuals who reported at least moderate severity of CT showed that lower threat appraisals buffered depressive symptoms. A similar pattern was found in individuals who reported no/low severity of CT. CONCLUSIONS: A reported history of CT acts as a latent vulnerability, exaggerating threat appraisals of everyday events, which trigger greater negative evening affect - processes that have important mental health consequences and may provide malleable intervention targets.

8.
Dev Psychobiol ; 63(5): 1597-1605, 2021 07.
Artigo em Inglês | MEDLINE | ID: mdl-33559157

RESUMO

Early life stress (ELS) is a well-established risk factor for psychopathology across the lifespan. Cognitive vulnerability to stress-induced cortisol may explain risk and resilience. The current study aimed to elucidate a psychobiological pathway linking stress to altered memory for affective words among youth with and without exposure to ELS. One hundred and fifteen youth (ages 9-16, 47% female) were randomized either to a psychosocial stressor or a control condition. Immediately following the stress or control condition, participants completed a memory task for affective words. Change in salivary cortisol from immediately before to 25 min after stress onset were used to predict memory for affective words. Exposure to the acute laboratory stressor led to activation of the HPA axis. Greater cortisol reactivity was associated with less accurate recognition of negative valence words. Among youth exposed to ELS, greater cortisol reactivity to acute stress was associated with poorer recognition of dysphoric and neutral words. Acute increases in cortisol may interfere with negatively-valenced information processing that has implications for memory. Youth exposed to high ELS may be particularly vulnerable to the effects of cortisol, which may explain one pathway through which stress leads to psychopathology among at-risk youth.


Assuntos
Experiências Adversas da Infância , Hidrocortisona , Adolescente , Criança , Feminino , Humanos , Hidrocortisona/metabolismo , Sistema Hipotálamo-Hipofisário/metabolismo , Masculino , Sistema Hipófise-Suprarrenal/metabolismo , Saliva/metabolismo , Estresse Psicológico/metabolismo
9.
Psychoneuroendocrinology ; 120: 104776, 2020 10.
Artigo em Inglês | MEDLINE | ID: mdl-32593866

RESUMO

BACKGROUND: Much work has documented hypothalamic pituitary adrenal (HPA) axis abnormalities in major depressive disorder (MDD), but inconsistencies leave this system's role in the illness unclear. Comparisons across studies are complicated by variation in co-morbidity (Posttraumatic Stress Disorder-PTSD, anxiety disorders), exposure to trauma, and timing of trauma (child vs. adult). Here, we examined the impact of these factors on HPA axis profiles in depression. METHODS: We recruited 5 groups of participants: MDD (n = 14), comorbid MDD + PTSD following adulthood trauma (MDD + PTSD-Adult; n = 12), comorbid MDD + PTSD following childhood trauma (MDD + PTSD-Child; n = 18), comorbid MDD + social anxiety disorder (MDD + SAD; n = 12), and non-depressed control participants who were sex and age matched to patients (combined total n = 36). HPA axis function was assessed using three challenges: stress reactivity via the Trier Social Stress Test (TSST), feedback sensitivity via a dexamethasone suppression test (DST), and central drive via a metyrapone challenge (MET). We compared hormonal responses between patient groups and their respective non-depressed controls. RESULTS: MDD + PTSD-Child showed low cortisol levels at baseline, and reduced adrenocorticotropic hormone (ACTH) levels at baseline and throughout the TSST. MDD-only, MDD + PTSD-Adult, and MDD + SAD did not differ from non-depressed controls in HPA axis responses to the TSST. Controlling for childhood trauma severity, the reduced baseline levels in MDD + PTSD-Child were no longer significant and significantly reduced baseline cortisol levels emerged for MDD + PTSD-Adult. No diagnostic group effects were detected with DST and MET. Childhood maltreatment subtypes were associated with unique HPA axis responses to TSST and MET. CONCLUSION: Comorbidity and trauma exposure, as well as their timing and type, contribute to inconsistencies in the depression literature and must be included in efforts to clarify the role of the HPA axis in MDD.


Assuntos
Depressão/fisiopatologia , Sistema Hipotálamo-Hipofisário/fisiopatologia , Sistema Hipófise-Suprarrenal/fisiopatologia , Hormônio Adrenocorticotrópico , Adulto , Experiências Adversas da Infância/psicologia , Transtornos de Ansiedade/fisiopatologia , Comorbidade , Depressão/metabolismo , Transtorno Depressivo Maior/metabolismo , Transtorno Depressivo Maior/fisiopatologia , Dexametasona , Feminino , Humanos , Hidrocortisona , Masculino , Transtornos de Estresse Pós-Traumáticos/metabolismo , Transtornos de Estresse Pós-Traumáticos/fisiopatologia
10.
Psychoneuroendocrinology ; 104: 210-218, 2019 06.
Artigo em Inglês | MEDLINE | ID: mdl-30884304

RESUMO

BACKGROUND: Stress exposure occurring across the lifespan increases risk for disease, potentially involving telomere length shortening. Stress exposure during childhood and adulthood has been cross-sectionally linked with shorter telomere length. However, few longitudinal studies have examined telomere length attrition over time, and none have investigated how stressor duration (acute life events vs. chronic difficulties), timing (childhood vs. adulthood), and perceived severity may be uniquely related to telomere length shortening. METHODS: To address these issues, we administered a standardized instrument for assessing cumulative lifetime stress exposure (Stress and Adversity Inventory; STRAIN) to 175 mothers of children with Autism Spectrum Disorder or neurotypical children and measured their leukocyte telomere length (LTL) at baseline and 2 years later. RESULTS: Greater count of lifetime stressors was associated with shorter LTL at baseline and greater LTL attrition over time. When separating lifetime stressors into acute life events and chronic difficulties, only greater count of chronic difficulties significantly predicted shorter baseline LTL and greater LTL attrition. Similarly, when examining timing of stressor exposure, only greater count of chronic childhood difficulties (age < 18) significantly predicted shorter baseline LTL and greater LTL attrition over the 2-year period in mid-life. Importantly, these results were robust while controlling for stressors occurring during the interim 2-year period. Post-hoc analyses suggested that chronic difficulties occurring during earlier childhood (0-12 years) were associated with greater LTL attrition. Cumulative stressor severity predicted LTL attrition in a parallel manner, but was less consistently associated with baseline LTL. CONCLUSIONS: These data are the first to examine the effects of different aspects of cumulative lifetime stress exposure on LTL attrition over time, suggesting that accumulated chronic difficulties during childhood may play a unique role in shaping telomere shortening in midlife.


Assuntos
Estresse Psicológico/fisiopatologia , Encurtamento do Telômero/fisiologia , Telômero/genética , Adulto , Experiências Adversas da Infância , Envelhecimento , Feminino , Humanos , Leucócitos , Acontecimentos que Mudam a Vida , Estudos Longitudinais , Pessoa de Meia-Idade , Mães , Estresse Psicológico/genética , Telômero/fisiologia
11.
Psychoneuroendocrinology ; 92: 57-65, 2018 06.
Artigo em Inglês | MEDLINE | ID: mdl-29627713

RESUMO

BACKGROUND: Stress plays a causal role in depression onset, perhaps via alteration of hypothalamic-pituitary-adrenal (HPA) axis functioning. HPA axis hyperactivity has been reported in depression, though inconsistently, and the nature of this relationship remains unclear, partly because cortisol measurement over time has been challenging. Development of hair cortisol assessment, a method that captures cortisol over prolonged periods of time, creates new possibilities. In this study, hair cortisol was incorporated into a prospective and longitudinal study of medical internship, stress and symptoms of depression. This provided a rare opportunity to 1) prospectively assess hair cortisol responses to stress, and 2) examine whether stress-induced changes in hair cortisol predict depressive symptom development. METHODS: Hair cortisol, depressive symptoms, and stress-relevant variables (work hours, sleep, perceived stress, mastery/control) were assessed in interns (n = 74; age 25-33) before and repeatedly throughout medical internship. RESULTS: Hair cortisol sharply increased with stressor onset, decreased as internship continued, and rose again at year's end. Depressive symptoms rose significantly during internship, but were not predicted by cortisol levels. Hair cortisol also did not correlate with increased stressor demands (work hours, sleep) or stress perceptions (perceived stress, mastery/control); but these variables did predict depressive symptoms. DISCUSSION: Hair cortisol and depressive responses increased with stress, but they were decoupled, following distinct trajectories that likely reflected different aspects of stress reactivity. While depressive symptoms correlated with stressor demands and stress perceptions, the longitudinal pattern of hair cortisol suggested that it responded to contextual features related to anticipation, novelty/familiarity, and social evaluative threat.


Assuntos
Depressão/fisiopatologia , Estresse Psicológico/fisiopatologia , Estudantes de Medicina/psicologia , Adulto , Doença Crônica/psicologia , Depressão/metabolismo , Transtorno Depressivo/fisiopatologia , Feminino , Cabelo/química , Humanos , Hidrocortisona/análise , Sistema Hipotálamo-Hipofisário/metabolismo , Internato e Residência , Estudos Longitudinais , Masculino , Sistema Hipófise-Suprarrenal/metabolismo , Estudos Prospectivos , Autorrelato
12.
Front Neuroendocrinol ; 49: 146-169, 2018 04.
Artigo em Inglês | MEDLINE | ID: mdl-29551356

RESUMO

Stress can influence health throughout the lifespan, yet there is little agreement about what types and aspects of stress matter most for human health and disease. This is in part because "stress" is not a monolithic concept but rather, an emergent process that involves interactions between individual and environmental factors, historical and current events, allostatic states, and psychological and physiological reactivity. Many of these processes alone have been labeled as "stress." Stress science would be further advanced if researchers adopted a common conceptual model that incorporates epidemiological, affective, and psychophysiological perspectives, with more precise language for describing stress measures. We articulate an integrative working model, highlighting how stressor exposures across the life course influence habitual responding and stress reactivity, and how health behaviors interact with stress. We offer a Stress Typology articulating timescales for stress measurement - acute, event-based, daily, and chronic - and more precise language for dimensions of stress measurement.


Assuntos
Alostase/fisiologia , Emoções/fisiologia , Desenvolvimento Humano/fisiologia , Modelos Biológicos , Estresse Psicológico/fisiopatologia , Humanos , Estresse Psicológico/classificação , Estresse Psicológico/etiologia , Estresse Psicológico/psicologia
13.
Stress ; 20(6): 533-540, 2017 11.
Artigo em Inglês | MEDLINE | ID: mdl-28845716

RESUMO

OBJECTIVES: The hypothalamic-pituitary-adrenal (HPA) axis is thought to mediate the effects of stress on illness. Research has identified a limited number of psychological variables that modulate human HPA responses to stressors (e.g. perceived control and social support). Prosocial goals can reduce subjective stress, but have not been carefully examined in experimental settings where pathways of impact on biological stress markers may be traced. Recent work demonstrated that coaching individuals to strive to help others reduced HPA responses to the Trier Social Stress Test (TSST) relative to other cognitive interventions. However, identification of mediational pathways, which were not examined in the original study, is necessary to determine whether the HPA buffering effects were due to helping motivations (compassionate goals; CGs) rather than via previously identified variables such as control or support. METHODS: In this new analysis, we combined the original cortisol data with novel observer ratings of interpersonal behavior and psychological variables during the stress task, and conducted new, theory-driven analyses to determine psychological mediators for the intervention's effect on cortisol responses (N = 54; 21 females, 33 males; 486 cortisol samples). RESULTS: Control, support, and task ego-threat failed to account for the effects of the intervention. As hypothesized, self and observer-rated CGs, as well as observer-rated perceptions of participants' interpersonal behavior as morally desirable (but not as dominant or affiliative) were significant mediators of neuroendocrine responses. CONCLUSIONS: The findings suggest that stress-reduction interventions based on prosocial behavior should target particular motivational and interpersonal features.


Assuntos
Empatia , Objetivos , Hidrocortisona/metabolismo , Sistema Hipotálamo-Hipofisário/metabolismo , Sistema Hipófise-Suprarrenal/metabolismo , Comportamento Social , Estresse Psicológico/metabolismo , Adolescente , Adulto , Biomarcadores/metabolismo , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Motivação , Saliva/química , Estresse Psicológico/psicologia , Adulto Jovem
14.
Psychoneuroendocrinology ; 82: 189-198, 2017 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-28233588

RESUMO

The HPA axis plays a key role in mediating the effects of "stress" on health, but clarifying mechanisms requires an understanding of psycho-biological linkages. There has long been an implicit assumption that subjective emotional distress (e.g., fear) should activate the HPA axis. Although this assumption was challenged 25 years ago (Curtis, 1976), laboratory studies in humans are limited. In this study we sought to replicate Curtis' findings and extend it by investigating if presence or absence of stressor control shapes HPA axis reactivity in a phobic fear exposure model. We recruited 19-45-year-old specific phobia participants (n=32 spider/snake phobia; n=14 claustrophobia) and gradually exposed them to their feared object or situation while measuring hormonal (ACTH and cortisol) and subjective (emotional distress, perceived control) responses. Utilizing a dyadic yoked design, we compared HPA reactivity when the pace of exposure was controlled by participants to identical exposure given to matched participants in the absence of control. Results showed that phobic fear exposure generated intense emotional distress without a corresponding increase in HPA axis activity. Although our actual manipulation of control failed to impact HPA responses, perceived control during exposure was associated with lower cortisol, an effect that was moderated by actual availability of stressor control. Our findings replicate Curtis' findings and challenge the still common but unsupported assumption that HPA axis activity reflects subjective distress. These results also highlight the importance of both perceived and actual aspects of stressor control in understanding what is truly "stressful" to the HPA axis system.


Assuntos
Medo/psicologia , Estresse Psicológico/metabolismo , Estresse Psicológico/psicologia , Hormônio Adrenocorticotrópico/análise , Hormônio Adrenocorticotrópico/sangue , Hormônio Adrenocorticotrópico/fisiologia , Adulto , Emoções/fisiologia , Medo/fisiologia , Feminino , Humanos , Hidrocortisona/análise , Hidrocortisona/sangue , Hidrocortisona/fisiologia , Sistema Hipotálamo-Hipofisário/fisiologia , Masculino , Transtornos Fóbicos/psicologia , Sistema Hipófise-Suprarrenal/fisiologia , Adulto Jovem
15.
Psychoneuroendocrinology ; 74: 324-332, 2016 12.
Artigo em Inglês | MEDLINE | ID: mdl-27716572

RESUMO

There is a growing realization that cognitive processes associated with stress coping, such as rumination and distraction, can impact the hypothalamic-pituitary-adrenal-axis (HPA-axis). Yet, little is known about what aspects of the HPA-axis stress response (rate of activation, duration of activation, rate of recovery) is impacted by such cognitive processes. This study examines the impact of both ruminative trait tendencies and experimentally induced rumination on salivary cortisol responses to a social evaluative stress task. Participants (n=71) were exposed to the Trier Social Stress Test (TSST) and were then randomized to complete either a rumination or distraction task. Trait rumination was also assessed at baseline. Results showed no main effects of either trait rumination or experimental condition, but they interacted to predict the cortisol response. Specifically, participants high in trait rumination had prolonged duration of cortisol activation in the rumination condition, compared to those in the distraction condition. In contrast, cortisol responses of participants with low trait rumination did not differ by condition. Notably, our interaction effect was only significant in females. Our findings highlight the complex relationship between rumination and HPA-axis activity, suggesting an interaction of trait and state rumination in shaping HPA-axis responses to stress, and call attention to sex differences in this relationship.


Assuntos
Hidrocortisona/metabolismo , Sistema Hipotálamo-Hipofisário/metabolismo , Personalidade/fisiologia , Sistema Hipófise-Suprarrenal/metabolismo , Ruminação Cognitiva/fisiologia , Estresse Psicológico/metabolismo , Estresse Psicológico/fisiopatologia , Adolescente , Adulto , Feminino , Humanos , Masculino , Saliva , Fatores Sexuais , Adulto Jovem
16.
Horm Behav ; 66(2): 457-65, 2014 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-25019964

RESUMO

Trait and contextual factors can shape individual and group differences in hypothalamic-pituitary-adrenal (HPA) response to stress; but the ways in which these factors may interact with each other to modulate stress activity have rarely been examined. Here, we investigated whether the association between a temperamental self-regulatory trait - Effortful Control (EC) - and HPA axis stress response is moderated by type of laboratory stress in sixty-five children (35 boys). EC was measured at ages 3 and 6 using age-appropriate laboratory batteries as well as mother reports. HPA axis responses were measured at age 7 by randomly assigning children to one of two laboratory stress tasks (frustration vs. fear). Results indicated that EC interacted with stress context in predicting cortisol response. Specifically, lower EC was associated with greater cortisol response (steeper reactivity slopes) in the context of a frustration stressor but this was reversed in a fear context where lower EC was associated with flatter, more gradual activation. It is likely that different components of EC, such as emotion regulation and attention, differentially interact with the stress context. These types of effects and interactions need to be more thoroughly understood in order to meaningfully interpret cortisol reactivity data and better characterize the role of the HPA axis in human psychopathology.


Assuntos
Sistemas Neurossecretores/fisiopatologia , Estresse Psicológico/fisiopatologia , Temperamento/fisiologia , Envelhecimento/psicologia , Criança , Pré-Escolar , Medo/psicologia , Feminino , Frustração , Humanos , Hidrocortisona/metabolismo , Sistema Hipotálamo-Hipofisário/fisiologia , Masculino
17.
Stress ; 17(4): 285-95, 2014 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-24754834

RESUMO

In this report, we present growth curve modeling (GCM) with landmark registration as an alternative statistical approach for the analysis of time series cortisol data. This approach addresses an often-ignored but critical source of variability in salivary cortisol analyses: individual and group differences in the time latency of post-stress peak concentrations. It allows for the simultaneous examination of cortisol changes before and after the peak while controlling for timing differences, and thus provides additional information that can help elucidate group differences in the underlying biological processes (e.g., intensity of response, regulatory capacity). We tested whether GCM with landmark registration is more sensitive than traditional statistical approaches (e.g., repeated measures ANOVA--rANOVA) in identifying sex differences in salivary cortisol responses to a psychosocial stressor (Trier Social Stress Test--TSST) in healthy adults (mean age 23). We used plasma ACTH measures as our "standard" and show that the new approach confirms in salivary cortisol the ACTH finding that males had longer peak latencies, higher post-stress peaks but a more intense post-peak decline. This finding would have been missed if only saliva cortisol was available and only more traditional analytic methods were used. This new approach may provide neuroendocrine researchers with a highly sensitive complementary tool to examine the dynamics of the cortisol response in a way that reduces risk of false negative findings when blood samples are not feasible.


Assuntos
Hormônio Adrenocorticotrópico/sangue , Hidrocortisona/sangue , Sistemas Neurossecretores/química , Saliva/química , Estresse Psicológico/metabolismo , Adolescente , Adulto , Feminino , Humanos , Masculino , Sistemas Neurossecretores/metabolismo , Sistema Hipófise-Suprarrenal/química , Sistema Hipófise-Suprarrenal/metabolismo , Saliva/metabolismo , Caracteres Sexuais , Adulto Jovem
18.
Psychoneuroendocrinology ; 44: 60-70, 2014 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-24767620

RESUMO

BACKGROUND: The hypothalamic-pituitary-adrenal (HPA) axis is a critical mediator linking stress to health. Understanding how to modulate its reactivity could potentially help reduce the detrimental health effects of HPA axis activation. Social evaluative threat is a potent activator of this system. Access to control and coping responses can reduce its reactivity to pharmacological activation. Compassionate or affiliative behaviors may also moderate stress reactivity. Impact of these moderators on social evaluative threat is unknown. Here, we tested the hypotheses that interventions to increase control, coping, or compassionate (versus competitive) goals could reduce HPA-axis response to social evaluative threat. METHODS: Healthy participants (n=54) were exposed to social evaluative threat using the Trier Social Stress Test (TSST). They were randomly assigned to receive one of four different instructions prior to the stressor: Standard TSST instructions (SI), standard instructions with access to "control" (SI Control), or one of two cognitive interventions (CI) that (1) increased familiarity and helped participants prepare coping strategies (CI Coping), or (2) shifted goal orientation from self-promotion to helping others (CI Compassionate Goals). ACTH and cortisol were obtained before and after stress exposure via intravenous catheter. RESULTS: Control alone had no effect. CI Compassionate Goals significantly reduced ACTH and cortisol responses to the TSST; CI Coping raised baseline levels. Compassionate Goals reduced hormonal responses without reducing subjective anxiety, stress or fear, while increasing expression of pro-social intentions and focus on helping others. CONCLUSIONS: Brief intervention to shift focus from competitive self-promotion to a goal orientation of helping-others can reduce HPA-axis activation to a potent psychosocial stressor. This supports the potential for developing brief interventions as inoculation tools to reduce the impact of predictable stressors and lends support to growing evidence that compassion and altruistic goals can moderate the effects of stress.


Assuntos
Adaptação Psicológica , Terapia Cognitivo-Comportamental , Sistema Hipotálamo-Hipofisário/fisiopatologia , Sistema Hipófise-Suprarrenal/fisiopatologia , Estresse Psicológico/terapia , Adolescente , Hormônio Adrenocorticotrópico/sangue , Adulto , Empatia , Feminino , Objetivos , Humanos , Hidrocortisona/sangue , Masculino , Pessoa de Meia-Idade , Estresse Psicológico/sangue , Estresse Psicológico/fisiopatologia , Resultado do Tratamento , Adulto Jovem
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