Journal
EUROPEAN ARCHIVES OF PSYCHIATRY AND CLINICAL NEUROSCIENCE
Volume 268, Issue 6, Pages 529-540Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s00406-017-0821-y
Keywords
Extrastriatal D-2/3 receptor; Excitement symptom; [F-18]fallypride; High-resolution PET; Insula; Schizophrenia
Categories
Funding
- National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [2016M3C7A1914451]
- Ministry of Health and Welfare, Republic of Korea [HI14C2750]
- Gachon University [GCU-2015-5031]
Ask authors/readers for more resources
The purpose of this study was to investigate the relationship between specific symptom severity and D-2/3 receptor availability in extrastriatal regions in outpatients with schizophrenia to shed light on the role of extrastriatal dopaminergic neurotransmission in the pathophysiology of symptoms of schizophrenia. Sixteen schizophrenia patients receiving relatively low-dose maintenance atypical antipsychotics and seventeen healthy controls underwent 3-Tesla magnetic resonance imaging and high-resolution positron emission tomography with [F-18]fallypride. For D-2/3 receptor availability, the binding potential with respect to non-displaceable compartment (BPND) was derived using the simplified reference tissue model. The BPND values were lower in patients on antipsychotic treatment than in controls across all regions with large effect sizes (1.03-1.42). The regions with the largest effect size were the substantia nigra, amygdala, and insula. Symptoms of schizophrenia were assessed using a five-factor model of the Positive and Negative Syndrome Scale (PANSS). The region of interest-based analysis showed that PANSS excitement factor score had a significant positive correlation with the [F-18]fallypride BPND in the insula. The equivalent dose of antipsychotics was not significantly correlated with PANSS factor scores or regional BPND values. The voxel-based analysis also revealed a significant positive association between the PANSS excitement factor and the [F-18]fallypride BPND in the insula. The present study revealed a significant association between excitement symptom severity and D-2/3 receptor availability in the insula in schizophrenia, suggesting a possible important role of D-2/3 receptor-mediated neurotransmission in the insula and related limbic system in the pathophysiology of this specific symptom cluster.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available