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Sex Differences in Stress Response: Classical Mechanisms and Beyond
Georgia E Hodes1, Debra Bangasser2, Ioannis Sotiropoulos3,4
1Virginia Tech, School of Neuroscience, Blacksburg, VA, USA.
Current Neuropharmacology
|October 19, 2023
Summary
Sex differences significantly impact stress responses and neuropsychiatric disorders. Understanding these variations is crucial for developing effective treatments for conditions like depression and Alzheimer's disease.
Area of Science:
- Neuroendocrinology
- Neuroimmunology
- Neuropsychiatry
Background:
- Neuropsychiatric disorders manifest differently in males and females due to sex-specific stress hormone dysregulation.
- Emerging evidence highlights significant sex and gender differences in stress responses, influencing disease presentation.
Purpose of the Study:
- To review known sex differences in the classic stress response mechanisms, including the hypothalamic-pituitary-adrenal (HPA) axis.
- To explore sex-based variations in neurotransmitters, neurodegeneration markers, gonadal hormones, and novel regulators of stress.
Main Methods:
- Comprehensive review of preclinical and clinical evidence on sex differences in stress response pathways.
- Analysis of data concerning glucocorticoids, corticotrophin-releasing factor (CRF), neurotransmitters (serotonin, dopamine, glutamate, GABA), and neurodegeneration markers (amyloid β, Tau).
Main Results:
- Significant sex differences exist in HPA axis activity, neurotransmitter levels, and neurodegeneration pathways.
- Gonadal hormones, immune system, genetic/epigenetic factors, and neurosteroids modulate stress responses differently between sexes.
Conclusions:
- Incorporating sex as a biological variable in research is essential for understanding stress-related neuropsychiatric disorders.
- Leveraging knowledge of sex differences in stress responses and pharmacology can lead to more effective therapeutics for conditions like depression, anxiety, and Alzheimer's disease.
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