Associations of Estradiol and Stress Reactivity in Pre- and Postmenopausal Women
试验速览
- 阶段
- 不适用
- 状态
- 招募中
- 发起方
- 入组人数
- 74
- 试验地点
- 1
- 主要终点
- Associations between elevated E2 concentration and acute stress effects on subjective experience
研究概览
简要总结
Stress reactivity and prevalence of stress related diseases differ between pre- and postmenopausal women. Thus, hormonal fluctuations may present a general vulnerability factor for stress-related diseases. Especially, the gonadal hormone estradiol (E2) seems to modulate the activity of stress related brain areas. The hippocampus and prefrontal areas control the amygdala's response to stress, and E2 may directly modulate the activity, connectivity and structure of these areas. In premenopausal women E2 seems to reduce stress reactivity. However, in postmenopausal women, who no longer produce E2 from the ovaries, E2 seem to increase stress reactivity. With the proposed study the investigators want to directly test E2's modulating effects (disentangled from other gonadal hormones) on stress reactivity of premenopausal women during their early follicular phase, and postmenopausal women by subjecting both groups of women to a psychosocial stress task in a neuroimaging environment.
详细描述
In a double-blinded repeated-measures within-between placebo-controlled design, two groups of women (premenopausal / postmenopausal) will receive either a placebo or estradiol valerate to experimentally increase estradiol (E2) levels. They will further undergo a psychosocial stress task (Montreal Imaging Stress Task) in a neuroimaging environment (functional magnetic resonance imaging - fMRI). By applying a multilevel approach, the investigators will be able to look at stress reactivity from a subjective, sympathetic (heart rate, skin conductance), endocrine (cortisol) and neural perspective. The investigators will further assess how changes in stress reactivity due to E2 increase are associated with gonadal hormones, and changes in neural activity, anatomy and connectivity in pre- compared to postmenopausal women.
At an initial screening session (T0) the investigators will be assessing sociodemographic variables, hand dominance, verbal intelligence, trial making, personality traits, gender identity and roles, childhood trauma, coping styles, sleep, female sexual health, reproductive status, menopausal symptoms, eating behaviour and premenstrual symptoms. After this all women will be invited to the first experimental session (T1, day 1), where blood and hair cortisol samples will be taken, subjective mood will be measured and the first pill treatment administered (placebo or E2 valerate, double-blinded) approx. 24h before the stress induction. They receive a second pill that they should take-in during the next day (T1/day2) approx. 4h before the stress induction. On T1/day 2 in the afternoon, participants come to the laboratory where the experimental procedure takes place. Participants will again be screened for MRI-exclusion criteria and after ensuring that all requirements are met to go into the MR-scanner, participants will be prepared (application of sensor for pulsoxymetry and electrodes for skin conductance assessment) and moved into the scanner, where they will undergo the stress induction via the Montreal Imaging Stress Task (MIST), a resting state scan, an anatomical scan and a diffusion tensor imaging (DTI) measurement. Throughout the MR-session, pulsoxymetry and skin conductance will constantly be assessed. Mood, subjective affect and stress, and saliva samples for further cortisol analyses will be taken at six time points throughout the experimental session. Furthermore, subjective variables on stress, self-esteem, emotion regulation, positive and negative affect, emotional self-rating, resting state, mental health, depression and anxiety scores and side effects of E2 intake will be assessed. A blood sample will be drawn (30ml) by medically trained personnel during the experimental session. For seven days following the experimental session, participants will give daily information on subjective experiences via an ecological momentary assessment (EMA). Then, the second experimental session (T2) will be scheduled at least two menstrual cycles (naturally cycling women) or 2 months (postmenopausal women) after the first experimental session (T1). For naturally cycling women, both experimental sessions will be scheduled up to 5 days after onset of menses. Naturally cycling women are asked to report the onset of their next menses after the experimental session. The procedure of the second experimental session (T2) will be similar to that of T1.
研究设计
- 研究类型
- Observational
- 观察模型
- Case Crossover
- 时间视角
- Cross Sectional
入排标准
- 年龄范围
- 18 Years 至 60 Years（Adult）
- 性别
- Female
- 接受健康志愿者
- 是
入选标准
- •Women, biologically female (assigned sex at birth)
- •normal body mass index (18-28 kg/m2)
- •Caucasian
- •non-smoking
- •German language fluency: at least advanced technical college entrance qualification
- •Naturally cycling women, older than 18 years with a regular menstrual cycle (25-35 days) and postmenopausal women up to the age of 60 will be included.
排除标准
- •Neurological or mental disease
- •Medical problems such as hormonal, metabolic, or chronic diseases (e.g., severe hypertension, diabetes, dysfunctions of the thyroid, or congestive heart failure) as well as venous thromboembolism
- •Pregnancy, delivery, and lactation (current and within the last year)
- •Any kind of steroid hormonal, pharmacological treatment, or psychotropic treatment in the last three months
- •Shift work
- •Participants engaging in competitive/extreme sports
- •Contraindication for MRI
- •People with non-removable metal objects on or in the body
- •Tattoos (if not MRI-incompatible according to expert guidelines)
- •Pathological hearing or increased sensitivity to loud noises
- •Claustrophobia
- •Surgery less than three months ago
- •Neurological disease or injury
- •Moderate or severe head injury
- •Intake of antidepressants or neuroleptics
- •Restricted vision
研究组 & 干预措施
premenopausal women
naturally cycling women without hormonal contraception
干预措施: Estradiol Valerate (Drug)
premenopausal women
naturally cycling women without hormonal contraception
干预措施: Placebo (Drug)
postmenopausal women
women after menopause (min. 12 months no menstrual bleeding)
干预措施: Estradiol Valerate (Drug)
postmenopausal women
women after menopause (min. 12 months no menstrual bleeding)
干预措施: Placebo (Drug)
结局指标
主要结局
Associations between elevated E2 concentration and acute stress effects on subjective experience
时间窗: Measured twice two-three months apart; each time: approx. 45 minutes before stress onset, just before stress onset, immediately after stress, approx. 40 minutes, 60 minutes and 120 minutes after stress onset
Ratings of positive and negative affect as well as stress, before and after stress induction. Comparing E2 against placebo in pre- and postmenopausal women.
Associations of E2 and acute stress effects on Hypothalamic-Pituitary-Adrenal-axis (HPA) response
时间窗: Measured twice two-three months apart; each time: approx. 45 minutes before stress onset, just before stress onset, immediately after stress, approx. 40 minutes, 60 minutes and 120 minutes after stress onset
Cortisol saliva samples before and after the stress task as indicator of stress/HPA-axis activation. Comparing E2 against placebo in pre- and postmenopausal women.
Association between E2 concentration and acute stress induced effects on neural level.
时间窗: Measured twice three months apart; each time: approx. 5 minutes during neuroimaging
Variability in activity of the brains stress network will be quantified using fMRI to assess differences between stress vs. control conditions during the stress task. Changes in activity will be assessed within regions associated with stress reactivity and regulation (amygdala, hippocampus, prefrontal cortex, anterior cingulate cortex (ACC), middle frontal gyrus (MFG), right superior temporal gyrus (STG), insula, striatum and praecuneus). Comparing E2 against placebo in pre- and postmenopausal women.
Association between E2 concentration and brain volume changes
时间窗: Measured twice two- three months apart; each time: approx. 10 minutes during neuroimaging
Via structural MRI scans changes in brain volume following E2 administration compared to placebo will be assessed, especially for the following brain regions: amygdala, hippocampus, prefrontal cortex (including orbito frontal cortex), anterior cingulate cortex (ACC), insula, middle frontal gyrus (MFG), right superior temporal gyrus (STG), fusiform gyrus, thalamus, cerebellum and inferior parietal lobule (IPL). Comparing E2 against placebo in pre- and postmenopausal women.
Association between E2 concentration and connectivity (resting state) changes
时间窗: Measured twice two-three months apart; each time: approx. 10 minutes during neuroimaging
Via a resting state scan, effects of estradiol concentration compared to placebo administration on connectivity changes will be assessed by applying whole brain network (especially Default Mode, Dorsal Attention, Frontoparietal, and Limbic networks) and region of interest analysis (especially of the amygdala, middle temporal gyrus (MTG), inferior frontal gyrus (IFG), postcentral gyrus, striatum, insula and ventrolateral, dorsolateral and medial prefrontal cortex (PFC), fusiform gyrus and anterior cingulate gyrus (ACC)). Comparing E2 against placebo in pre- and postmenopausal women.
Changes in hormonal levels induced by increased E2 concentration.
时间窗: Measured twice two-three months apart; pill intake a day before and on the day of neuroimaging
Changes in progesterone, testosterone, and allopregnanolone levels (nmol/L) will be assessed from blood samples before and after pill intake (placebo or estradiol valerate) and stress induction. Comparing E2 against placebo in pre- and postmenopausal women.
次要结局
- Associations between E2 concentration and acute stress effects on physiological responses.(Measured twice two-three months apart; each time: 20 minutes during the fMRI stress task)
- Association between E2 concentration and chronic stress(Measured twice two-three months apart)
- Association between E2 concentration and effects on aftermath of stress.(Measured twice two-three months apart; each time for 7days)
- Associations between elevated E2 concentration and acute stress effects on subjective experience(Measured twice two-three months apart; each time: approx. 45 minutes before stress onset and120 minutes after stress onset)