Differential effects of avoidance and approach negative personality traits on patterns of stress cardiovascular responses

Quadratic associations between cardiovascular stress reactivity and development of cool and hot executive functions in adolescents

Stress affects executive functions and exploring the association between stress-induced physiological reactivity and executive functions could highlight the potential mechanism of the stress-cognitive function link. Our study examined the linear and nonlinear associations between cardiovascular stress reactivity and cool and hot executive functions among adolescents. In November 2021 (T1), 273 Chinese adolescents between 11 and 14 (Mage = 12.93, SDage = 0.79) underwent a speech task during which their cardiovascular data were recorded, and they completed a Flanker task and an Emotional Stroop task. In May 2023 (T2), 253 adolescents again completed the Flanker and Emotional Stroop tasks. Cool and hot executive functions were assessed using the intra-individual reaction time variability of the Flanker task and Emotional Stroop task, respectively. Results showed that cardiovascular stress reactivity was positively linearly associated with cool executive functions at T1 and quadratically (inverted U-shaped) associated with cool executive functions at T1 and hot executive functions at T1 and T2. These findings suggest that compared to very high and very low cardiovascular reactivity, moderate to high cardiovascular reactivity to a structured social challenge is associated with better cool and hot executive functions.

Early life adversity and cardiovascular responses to repeated stress among adolescents: Moderating role of COMT gene rs4680 polymorphism

BACKGROUND

Early life adversity (ELA) increases the risk of cardiovascular diseases through dysregulation of cardiovascular stress responses manifested by either exaggerated or blunted reactivity. The catechol-O-methyltransferase (COMT) gene rs4680 polymorphism has been identified in gene-environment interaction (G×E) studies to explain individual differences in the effects of ELA on physiological stress responses. However, little is known about whether ELA interacts with COMT gene rs4680 polymorphism to affect cardiovascular responses to repeated stress exposures.

OBJECTIVE

The current study examined the associations between ELA and cardiovascular responses to repeated stress exposures, and the moderating role of COMT rs4680 polymorphism in these associations.

METHODS

The childhood trauma questionnaire (CTQ) was administered to 359 junior school students who underwent a two-successive stress exposures protocol with continuous cardiovascular monitoring [heart rate (HR) and systolic and diastolic blood pressure (SBP, DBP)] across four laboratory phases, and their saliva samples for deoxyribonucleic acid (DNA) genotyping were collected.

RESULTS

ELA was associated with blunted HR reactivity to the first and second stress exposures, blunted SBP reactivity to the first stress exposure, and attenuated SBP habituation to repeated stress exposures. Moreover, COMT rs4680 moderated these associations, such that the associations between ELA and blunted HR, SBP, and DBP reactivity to the first stress and disrupted DBP habituation to repeated stress exposures only existed in GA/AA genotype carriers but not in GG genotype carriers.

CONCLUSIONS

These findings suggest that the A allele of COMT rs4680 is vulnerable to the negative effects of ELA on the developmental dysregulation of stress physiological systems.

Associations between general trait anxiety, trait social anxiety and cardiovascular responses to social and non-social stressors

OBJECTIVE

The present study sought to examine whether anxiety propensity dimensions (general trait anxiety vs. trait social anxiety) interact with stressor types (tasks with social vs. non-social challenges) to determine cardiovascular stress responses.

METHODS

A 2 × 3 mixed-factorial experimental design was employed. The State-Trait Anxiety Inventory, the Social Performance and Social Interaction Anxiety Scales were administered to 233 participants, who engaged in a stress task with either social or non-social challenges during which their cardiovascular data were continuously collected.

RESULTS

General trait anxiety negatively predicted heart rate (HR), systolic blood pressure (SBP), diastolic blood pressure (DBP) reactivity (β = -0.16, p = 0.001; β = -0.17, p = 0.001; β = -0.18, p < 0.001), and positively predicted HR, SBP, DBP recovery (β = 0.16, p = 0.012; β = 0.15, p = 0.014; β = 0.15, p = 0.011), regardless of stress types. Social performance anxiety (β = -0.23, p = 0.002; β = -0.25, p = 0.001; β = -0.24, p = 0.001) and social interaction anxiety (β = -0.22, p < 0.001; β = -0.25, p < 0.001; β = -0.22, p < 0.001) only negatively predicted HR, SBP, DBP reactivity to the stress task with social challenges. No associations were observed between trait social anxiety and cardiovascular recovery from the stress task with social or non-social challenges.

CONCLUSIONS

These findings suggest that different trait anxiety dimensions interact with stressor types in affecting cardiovascular stress responses, which have different health implications.

Autonomic Nervous System Response Patterns of Test-Anxious Individuals to Evaluative Stress

Test anxiety is a widespread and primarily detrimental emotion in learning and achievement settings. This research aimed to explore the autonomic nervous system (ANS) response patterns of test-anxious individuals in response to evaluative stress. By presenting a standard interview task, an evaluative scenario was effectively induced. Heart rate variability (HRV), a biomarker that can accurately reflect the ANS activity, was used to reflect the physiological responses of 48 high test-anxious subjects and 49 low test-anxious subjects. Results indicate that: (1) both groups show a significantly increased emotional arousal in the evaluative scenario; (2) high test-anxious individuals show a significantly decreased emotional pleasantness in the evaluative scenario, whereas low test-anxious individuals show no significant changes; (3) both groups show a significantly increased low-frequency HRV; (4) high test-anxious individuals show a significantly decreased high-frequency HRV and root mean square of successive heartbeat interval differences (RMSSD), whereas low test-anxious individuals remain stable. These findings suggest that high test-anxious individuals display an increased sympathetic nervous system (SNS) activity and a decreased parasympathetic nervous system (PNS) activity in response to evaluative stress, while low-anxious individuals display an increased SNS activity and a stable PNS activity in response to evaluative stress.