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Biological Sex Differences in Depression: A Systematic Review.
Ainitze Labaka1, Olatz Goñi-Balentziaga1, Andrea Lebeña1
11 Department of Basic Psychological Processes and their Development, University of the Basque Country, San Sebastián, Spain.
Biological Research for Nursing
|May 16, 2018
Summary
Major depressive disorder (MDD) shows distinct biological patterns between sexes. Women with MDD exhibit higher inflammatory, neurotrophic, and serotonergic markers, impacting symptom severity.
Area of Science:
- Neuroscience
- Psychiatry
- Genetics
Background:
- Depression is a leading global cause of disability.
- Prevalence of depression is twice as high in women compared to men.
- Limited data exists on sex-specific pathophysiology in major depressive disorder (MDD).
Purpose of the Study:
- To systematically review and identify biological sex differences in MDD.
- Focus on studies published within the last 10 years.
Main Methods:
- Conducted a literature search across Medline, PsycInfo, PubMed, and Web of Science.
- Selected English-language studies comparing physiological measures by sex in MDD patients.
- Included studies with diverse methodologies and samples.
Main Results:
- Identified 20 relevant studies.
- Physiological measures included serum biomarkers, gene mRNA expression, and brain activity.
- Women with MDD showed higher levels of inflammatory, neurotrophic, and serotonergic markers.
- A stronger correlation was observed between these markers and symptom severity in women.
Conclusions:
- Findings suggest distinct biological patterns in MDD based on sex.
- These differences may have significant implications for targeted depression treatments.
- Future research needs sex-stratified analysis, controlled variables (hormones, medication), and consistent psychobiological evaluation criteria.
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