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Sex difference in depression: Which animal models mimic it.
Javed Iqbal1, Frank Adu-Nti1, Xuejiao Wang1
1Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry, National Engineering Laboratory for Resource Development of Endangered Chinese Crude Drugs in Northwest China, College of Life Sciences, Shaanxi Normal University.
Behavioral Neuroscience
|April 1, 2020
Summary
Subchronic variable stress (SCVS) models depression-like behaviors in female rats, while chronic unpredictable mild stress (CUMS) affects males. SCVS is a valuable tool for studying sex differences in depression research.
Area of Science:
- Neuroscience
- Behavioral Science
- Psychiatry
Background:
- Women exhibit higher depression incidence, yet animal models often neglect sex differences.
- Understanding sex-specific depression mechanisms requires appropriate animal models.
Purpose of the Study:
- To identify rat stress models that accurately reflect human sex differences in depression.
- To investigate sex-specific molecular risk factors in depression models.
Main Methods:
- Compared subchronic variable stress (SCVS) and chronic unpredictable mild stress (CUMS) in male and female rats.
- Utilized quantitative reverse transcriptase polymerase chain reaction to analyze hippocampal mRNA levels of key psychiatric disorder-related transcripts.
Main Results:
- SCVS induced depression-like behaviors exclusively in female rats.
- CUMS predominantly induced depression-like behaviors in male rats.
- SCVS altered specific hippocampal mRNA levels in females (e.g., Robo2, Npas4) and males (e.g., Hdac2), while CUMS showed limited effects.
Conclusions:
- SCVS serves as a suitable model for investigating sex differences in depression-like behaviors in rats.
- This study highlights distinct stressor-induced behavioral and molecular sex differences in depression models.
