Gender differences in major depressive disorder at different ages: a REST-meta-MDD project-based study

Area of Science:

• Neuroscience
• Psychiatry
• Medical Imaging

Background:

• Major Depressive Disorder (MDD) is a complex condition with varied presentations influenced by age and gender.
• Neural underpinnings of these demographic differences in MDD remain largely unexplored.
• Understanding these variations is crucial for targeted therapeutic strategies.

Purpose of the Study:

• To investigate gender-specific differences in local brain function among Major Depressive Disorder (MDD) patients.
• To examine these differences across distinct age onset groups (young and middle-aged).
• To utilize resting-state functional imaging and Regional Homogeneity (ReHo) analysis.

Main Methods:

• Analysis of resting-state functional magnetic resonance imaging (fMRI) data from 364 MDD patients and 695 healthy controls (REST-meta-MDD project).
• Application of the ReHo method to assess local brain function.
• Stratification of participants by gender and age groups (18-29 and 30-45 years).

Main Results:

• In young MDD patients (18-29 years), males showed higher ReHo in the right superior frontal gyrus, right inferior frontal gyrus, left superior temporal gyrus, and right superior parietal lobule compared to females.
• Male MDD patients exhibited elevated ReHo in the right superior parietal lobule compared to healthy males.
• Middle-aged MDD patients (30-45 years) displayed significant ReHo differences in the bilateral cerebellum posterior lobe, with females showing higher values than males.

Conclusions:

• Functional brain mechanisms in MDD exhibit significant gender and age-dependent variations.
• Findings emphasize the necessity for personalized interventions and treatments tailored to specific gender-age subgroups of MDD patients.
• Development of gender-specific antidepressant medications is warranted based on these distinct neural profiles.