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Changes in brain metabolic connectivity underlie autistic-like social deficits in a rat model of autism spectrum disorder

 Hojin Cho  ;  Chul Hoon Kim  ;  Elizabeth Quattrocki Knight  ;  Hye Won Oh  ;  Bumhee Park  ;  Dong Goo Kim  ;  Hae-Jeong Park 
 Scientific Reports, Vol.7(1) : 13213, 2017 
Journal Title
 Scientific Reports 
Issue Date
The neurobiological basis of social dysfunction and the high male prevalence in autism spectrum disorder (ASD) remain poorly understood. Although network alterations presumably underlie the development of autistic-like behaviors, a clear pattern of connectivity differences specific to ASD has not yet emerged. Because the heterogeneous nature of ASD hinders investigations in human subjects, we explored brain connectivity in an etiologically homogenous rat model of ASD induced by exposure to valproic acid (VPA) in utero. We performed partial correlation analysis of cross-sectional resting-state 18F-fluorodeoxyglucose positron emission tomography scans from VPA-exposed and control rats to estimate metabolic connectivity and conducted canonical correlation analysis of metabolic activity and behavior scores. VPA-treated rats exhibited impairments in social behaviors, and this difference was more pronounced in male than female rats. Similarly, current analyses revealed sex-specific changes in network connectivity and identified distinct alterations in the distributed metabolic activity patterns associated with autistic-like social deficits. Specifically, diminished activity in the salience network and enhanced activity in a cortico-cerebellar circuit correlated with the severity of social behavioral deficits. Such metabolic connectivity features may represent neurobiological substrates of autistic-like behavior, particularly in males, and may serve as a pathognomonic sign in the VPA rat model of ASD.
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1. Journal Papers (연구논문) > 1. College of Medicine (의과대학) > Dept. of Pharmacology (약리학교실)
1. Journal Papers (연구논문) > 1. College of Medicine (의과대학) > Dept. of Nuclear Medicine (핵의학교실)
Yonsei Authors
김동구(Kim, Dong Goo) ; 김철훈(Kim, Chul Hoon) ; 박해정(Park, Hae Jeong) ; 조호진(Cho, Ho Jin)
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