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Reduced brain serotonin transporter binding in patients with panic disorder
Eduard Maron1, Jyrki T Kuikka, Jakov Shlik
1Department of Psychiatry, University of Tartu, Raja 31, Tartu 50417, Estonia. Eduard.Maron@kliinikum.ee
Psychiatry Research
|December 16, 2004
Summary
Panic disorder (PD) involves serotonin transporter (5-HTT) dysregulation, particularly in the midbrain and thalamus. Reduced 5-HTT binding correlates with symptom severity, suggesting altered serotonin function in PD patients.
Area of Science:
- Neuroscience
- Psychiatry
- Radiology
Background:
- The serotonin (5-HT) system is implicated in panic disorder (PD) neurobiology.
- The 5-HT transporter (5-HTT) is crucial for serotonin neurotransmission, but its role in PD is unclear.
Purpose of the Study:
- To investigate the brain binding of the 5-HT transporter (5-HTT) in patients with panic disorder.
- To explore the relationship between 5-HTT binding and panic symptom severity.
Main Methods:
- Utilized single-photon emission computed tomography (SPECT) with [(123)I]nor-beta-CIT, a specific 5-HTT radioligand.
- Compared 5-HTT binding in patients with current PD, PD in remission, and healthy controls.
Main Results:
- Patients with current PD exhibited significantly decreased 5-HTT binding in the midbrain, temporal lobes, and thalamus compared to controls.
- 5-HTT binding in PD remission was similar to controls in the midbrain and temporal lobes, but reduced in the thalamus.
- Regional 5-HTT binding negatively correlated with panic symptom severity.
Conclusions:
- Findings indicate 5-HT system dysregulation in PD patients.
- Altered 5-HTT function is linked to the clinical status of PD patients.
- Clinical improvement in PD is associated with normalized 5-HTT binding, particularly in the thalamus.