TY - JOUR
T1 - Dissociation of fractional anisotropy and resting-state functional connectivity alterations in antipsychotic-naive first-episode schizophrenia
AU - Liu, Jieke
AU - Yao, Li
AU - Zhang, Wenjing
AU - Deng, Wei
AU - Xiao, Yuan
AU - Li, Fei
AU - Sweeney, John A.
AU - Gong, Qiyong
AU - Lui, Su
N1 - Funding Information:
This study was supported by National Natural Science Foundation of China (grant numbers 81371527, 81671664, 81621003), Program for Changjiang Scholars and Innovative Research Team in University of China (PCSIRT, grant number IRT16R52), Fundamental Research Funds for the Central Universities (2018SCUH0011), and Science and Technology Project of the Health Planning Committee of Sichuan (18ZD035). Prof. Gong would like to acknowledge the support from Changjiang Scholar Professorship Awards of China (award number T2014190). Prof. Lui would like to acknowledge the support from Chang Jiang Scholars of China (award number Q2015154) and the National Program for Support of Top-notch Young Professionals (award number W02070140). The funders of the study had no role in study design, data collection, data analysis, data interpretation, or writing of the report.
Funding Information:
This study was supported by National Natural Science Foundation of China (grant numbers 81371527 , 81671664 , 81621003 ), Program for Changjiang Scholars and Innovative Research Team in University of China (PCSIRT, grant number IRT16R52 ), Fundamental Research Funds for the Central Universities ( 2018SCUH0011 ), and Science and Technology Project of the Health Planning Committee of Sichuan ( 18ZD035 ). Prof. Gong would like to acknowledge the support from Changjiang Scholar Professorship Awards of China (award number T2014190). Prof. Lui would like to acknowledge the support from Chang Jiang Scholars of China (award number Q2015154) and the National Program for Support of Top-notch Young Professionals (award number W02070140). The funders of the study had no role in study design, data collection, data analysis, data interpretation, or writing of the report.
Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2019/2
Y1 - 2019/2
N2 - Altered resting-state functional connectivity (rsFC) has been demonstrated between multiple brain regions in schizophrenia. However, whether these alterations are related to fractional anisotropy (FA) alterations in pathways that connect regions with altered rsFC remains unknown. In this study, diffusion tensor imaging and resting-state functional magnetic resonance imaging were performed with 181 antipsychotic-naïve first-episode schizophrenia patients and 173 matched healthy controls. FA was measured using tensor-guided tractography in identifiable pathways between selected pairs of brain regions with altered rsFC as determined by prior meta-analysis. Compared with controls, patients showed significantly decreased FA between right caudate nucleus and right pallidum, right caudate nucleus and right putamen, and right hippocampus and right thalamus. Decreased rsFC was observed between right pallidum and right thalamus, and right insula and right superior temporal gyrus. No significant correlation was observed between FA and rsFC. FA between right caudate nucleus and right putamen was inversely correlated with negative symptoms while rsFC between right pallidum and right thalamus was inversely correlated with positive symptoms. The lack of robust correlations between FA and rsFC and no overlap of these abnormalities indicate that regional rsFC alterations in the early course of schizophrenia are not primarily associated with FA alterations. The observation that positive and negative symptoms are related to different functional and structural disturbances is consistent with this dissociation, and with prior work suggests that different pathophysiological mechanism may underlie positive and negative symptoms in the early course of schizophrenia.
AB - Altered resting-state functional connectivity (rsFC) has been demonstrated between multiple brain regions in schizophrenia. However, whether these alterations are related to fractional anisotropy (FA) alterations in pathways that connect regions with altered rsFC remains unknown. In this study, diffusion tensor imaging and resting-state functional magnetic resonance imaging were performed with 181 antipsychotic-naïve first-episode schizophrenia patients and 173 matched healthy controls. FA was measured using tensor-guided tractography in identifiable pathways between selected pairs of brain regions with altered rsFC as determined by prior meta-analysis. Compared with controls, patients showed significantly decreased FA between right caudate nucleus and right pallidum, right caudate nucleus and right putamen, and right hippocampus and right thalamus. Decreased rsFC was observed between right pallidum and right thalamus, and right insula and right superior temporal gyrus. No significant correlation was observed between FA and rsFC. FA between right caudate nucleus and right putamen was inversely correlated with negative symptoms while rsFC between right pallidum and right thalamus was inversely correlated with positive symptoms. The lack of robust correlations between FA and rsFC and no overlap of these abnormalities indicate that regional rsFC alterations in the early course of schizophrenia are not primarily associated with FA alterations. The observation that positive and negative symptoms are related to different functional and structural disturbances is consistent with this dissociation, and with prior work suggests that different pathophysiological mechanism may underlie positive and negative symptoms in the early course of schizophrenia.
KW - Fractional anisotropy
KW - Resting-state functional connectivity
KW - Schizophrenia
KW - Structural-functional relationship
UR - http://www.scopus.com/inward/record.url?scp=85051564876&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85051564876&partnerID=8YFLogxK
U2 - 10.1016/j.schres.2018.08.005
DO - 10.1016/j.schres.2018.08.005
M3 - Article
C2 - 30121186
AN - SCOPUS:85051564876
SN - 0920-9964
VL - 204
SP - 230
EP - 237
JO - Schizophrenia Research
JF - Schizophrenia Research
ER -