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논문 기본 정보

자료유형
학술저널
저자정보
Shin Sangho (Department of Psychiatry Korea University Ansan Hospital Ansan Republic of Korea) Jung Wi Hoon (Department of Psychology Gachon University Seongnam Republic of Korea) Robert McCutcheon (Institute of Psychiatry Psychology and Neuroscience King’s College London London United Kingdom) Mattia Veronese (Institute of Psychiatry Psychology and Neuroscience King’s College London London United Kingdom) Katherine Beck (Institute of Psychiatry Psychology and Neuroscience King’s College London London United Kingdom) Lee Jae Sung (Department of Nuclear Medicine Seoul National University College of Medicine Seoul Republic of Kore) Lee Yun-Sang (Department of Nuclear Medicine Seoul National University College of Medicine Seoul Republic of Kore) Oliver D. Howes (Institute of Psychiatry Psychology and Neuroscience King’s College London London United Kingdom) Kim Euitae (Department of Psychiatry Seoul National University Bundang Hospital Seongnam Republic of Korea) Kwon Jun Soo (Department of Psychiatry Seoul National University College of Medicine Seoul Republic of Korea)
저널정보
대한신경정신의학회 PSYCHIATRY INVESTIGATION PSYCHIATRY INVESTIGATION 제19권 제7호
발행연도
2022.7
수록면
570 - 579 (10page)
DOI
10.30773/pi.2022.0033

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Objective Striatal dopamine dysfunction caused by cortical abnormalities is a leading hypothesis of schizophrenia. Although prefrontal cortical pathology is negatively correlated with striatal dopamine synthesis, the relationship between structural frontostriatal connectivity and striatal dopamine synthesis has not been proved in patients with schizophrenia with different treatment response. We therefore investigated the relationship between frontostriatal connectivity and striatal dopamine synthesis in treatment-responsive schizophrenia (non-TRS) and compared them to treatment-resistant schizophrenia (TRS) and healthy controls (HC).Methods Twenty-four patients with schizophrenia and twelve HC underwent [<sup>18</sup>F] DOPA PET scans to measure dopamine synthesis capacity (the influx rate constant K<sub>i</sub><sup>cer</sup>) and diffusion 3T MRI to measure structural connectivity (fractional anisotropy, FA). Connectivity was assessed in 2 major frontostriatal tracts. Associations between K<sub>i</sub><sup>cer</sup> and FA in each group were evaluated using Spearman’s rho correlation coefficients.Results Non-TRS showed a negative correlation (r=-0.629, p=0.028) between connectivity of dorsolateral prefrontal cortex-associative striatum (DLPFC-AST) and dopamine synthesis capacity of associative striatum but this was not evident in TRS (r=-0.07, p=0.829) and HC (r=-0.277, p=0.384).Conclusion Our findings are consistent with the hypothesis of dysregulation of the striatal dopaminergic system being related to prefrontal cortex pathology localized to connectivity of DLPFC-AST in non-TRS, and also extend the hypothesis to suggest that different mechanisms underlie the pathophysiology of non-TRS and TRS.

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