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Updated: Jun 23, 2025
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Signal Attenuation as a Rat Model of Obsessive Compulsive Disorder
Published on: January 9, 2015
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Lower synaptic density and its association with cognitive dysfunction in patients with obsessive-compulsive disorder.
Qian Xiao1, Jiale Hou2, Ling Xiao2
1Mental Health Center, Xiangya Hospital, Central South University, Changsha, Hunan, China.
General Psychiatry
|June 19, 2024
Summary
Obsessive-compulsive disorder (OCD) is linked to reduced synaptic density in key brain areas. This reduction correlates with cognitive dysfunction, offering potential therapeutic targets.
Area of Science:
- Neuroscience
- Psychiatry
- Radiology
Background:
- Understanding synaptic alterations in obsessive-compulsive disorder (OCD) is critical for elucidating its pathology.
- In vivo research on synaptic changes in OCD is limited.
Purpose of the Study:
- Identify synaptic density indicators in OCD.
- Explore the relationship between cognitive dysfunction and synaptic density changes in OCD.
Main Methods:
- Enrolled 28 drug-naive adults with OCD and 16 healthy controls (HCs).
- Utilized 3D T1-weighted MRI and 18F-SynVesT-1 PET imaging.
- Assessed cognitive function using the Wisconsin Cart Sorting Test (WCST).
Main Results:
- Patients with OCD showed reduced synaptic density in the cortico-striato-thalamo-cortical circuit (bilateral putamen, left caudate, left parahippocampal gyrus, left insula, left middle occipital lobe).
- WCST performance positively correlated with synaptic density reduction in the left middle occipital gyrus, left parahippocampal gyrus, and left putamen.
Conclusions:
- Adults with OCD exhibit lower synaptic density compared to HCs, as indicated by 18F-SynVesT-1 uptake.
- This study is the first to investigate synaptic density in OCD, providing insights into biological targets for cognitive dysfunction.
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