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Published in: Metabolic Brain Disease 1/2018

01-02-2018 | Original Article

Impact of previous episodes of hepatic encephalopathy on short-term brain function recovery after liver transplantation: a functional connectivity strength study

Authors: Yue Cheng, Gaoyan Zhang, Wen Shen, Li-Xiang Huang, Li Zhang, Shuang-Shuang Xie, Xiao-Dong Zhang, Baolin Liu

Published in: Metabolic Brain Disease | Issue 1/2018

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Abstract

Neuropsychological studies have documented an incomplete reversal of pre-existing cognitive dysfunction in cirrhotic patients after liver transplantation (LT) and have found this is more severe in patients with hepatic encephalopathy (HE). In this study, we aimed to investigate the impact of prior HE episodes on post-transplantation brain function recovery. Resting-state functional magnetic resonance imaging data was collected from 30 healthy controls and 33 cirrhotic patients (HE, n = 15 and noHE, n = 18) before and one month after LT. Long- and short-range functional connectivity strength (FCS) analysis indicated that before transplantation both noHE and HE groups showed diffuse FCS abnormalities relative to healthy controls. For the noHE group, the abnormal FCS found before LT largely returned to normal levels after LT, except for in the cerebellum, precuneus, and orbital middle frontal gyrus. However, the abnormal FCS prior to LT was largely preserved in the HE group, including high-level cognition-related (frontal and parietal lobes) and vision-related areas (occipital lobe, cuneus, and precuneus). In addition, comparisons between HE and noHE groups revealed that weaker FCS in default mode network (DMN) in HE group persisted from pre- to post- LT. Correlation analysis showed that changes in FCS in the left postcentral and right middle frontal gyrus correlated with alterations in neuropsychological performance and ammonia levels. In conclusion, the findings in this study demonstrate potential adverse effects of pre-LT episode of HE on post-LT brain function recovery, and reveal that DMN may be the most affected brain region by HE episodes, which can’t be reversed by LT.
Literature
go back to reference Garcia-Tsao G, Lim JK, Members of Veterans Affairs Hepatitis CRCP (2009) Management and treatment of patients with cirrhosis and portal hypertension: recommendations from the Department of Veterans Affairs Hepatitis C Resource Center Program and the National Hepatitis C Program. Am J Gastroenterol 104(7):1802–1829. https://doi.org/10.1038/ajg.2009.191 CrossRefPubMed Garcia-Tsao G, Lim JK, Members of Veterans Affairs Hepatitis CRCP (2009) Management and treatment of patients with cirrhosis and portal hypertension: recommendations from the Department of Veterans Affairs Hepatitis C Resource Center Program and the National Hepatitis C Program. Am J Gastroenterol 104(7):1802–1829. https://​doi.​org/​10.​1038/​ajg.​2009.​191 CrossRefPubMed
Metadata
Title
Impact of previous episodes of hepatic encephalopathy on short-term brain function recovery after liver transplantation: a functional connectivity strength study
Authors
Yue Cheng
Gaoyan Zhang
Wen Shen
Li-Xiang Huang
Li Zhang
Shuang-Shuang Xie
Xiao-Dong Zhang
Baolin Liu
Publication date
01-02-2018
Publisher
Springer US
Published in
Metabolic Brain Disease / Issue 1/2018
Print ISSN: 0885-7490
Electronic ISSN: 1573-7365
DOI
https://doi.org/10.1007/s11011-017-0155-5

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