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Reduced Binding Potential of GABA-A/Benzodiazepine Receptors in Individuals at Ultra-high Risk for Psychosis:An [18F]-Fluroflumazenil Positron Emission Tomography Study

Authors
 Jee In Kang  ;  Hae-Jeong Park  ;  Jong Doo Lee  ;  Jun Soo Kwon  ;  Suk Kyoon An  ;  Eun Lee  ;  Su Young Lee  ;  Kyung Ran Kim  ;  Se Joo Kim 
Citation
 Schizophrenia Bulletin, Vol.40(3) : 548-557, 2014 
Journal Title
 Schizophrenia Bulletin 
ISSN
 0586-7614 
Issue Date
2014
Abstract
Background: Altered transmission of gamma-aminobutyric acid (GABA), a major inhibitory neurotransmitter, may contribute to the development of schizophrenia. The purpose of the present study was to investigate the presence of GABA-A/benzodiazepine (BZ) receptor binding abnormalities in individuals at ultra-high risk (UHR) for psychosis in comparison with normal controls using [18F]-fluoroflumazenil (FFMZ) positron emission tomography (PET). In particular, we set regions of interest in the striatum (caudate, putamen, and nucleus accumbens) and medial temporal area (hippocampus and parahippocampal gyrus). Methods: Eleven BZ-naive people at UHR and 15 normal controls underwent PET scanning using [18F]-FFMZ to measure GABA-A/BZ receptor binding potential. The regional group differences between UHR individuals and normal controls were analyzed using Statistical Parametric Mapping 8 software. Participants were evaluated using the structured interview for prodromal syndromes and neurocognitive function tasks. Results: People at UHR demonstrated significantly reduced binding potential of GABA-A/BZ receptors in the right caudate. Conclusions: Altered GABAergic transmission and/or the imbalance of inhibitory and excitatory systems in the striatum may be present at the putative prodromal stage and play a pivotal role in the pathophysiology of psychosis.
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/98579
DOI
10.1093/schbul/sbt052
Appears in Collections:
1. Journal Papers (연구논문) > 1. College of Medicine (의과대학) > Dept. of Nuclear Medicine (핵의학교실)
1. Journal Papers (연구논문) > 1. College of Medicine (의과대학) > Dept. of Psychiatry (정신과학교실)
Yonsei Authors
강지인(Kang, Jee In) ; 김경란(Kim, Kyung Ran) ; 김세주(Kim, Se Joo) ; 박해정(Park, Hae Jeong) ; 안석균(An, Suk Kyoon) ; 이은(Lee, Eun) ; 이종두(Lee, Jong Doo)
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Full Text
http://schizophreniabulletin.oxfordjournals.org/content/40/3/548.long
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