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N-glycan based biomarker distinguishing non-alcoholic steatohepatitis from steatosis independently of fibrosis.
MedLine Citation:
PMID:  22119618     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
BACKGROUND: Non-alcoholic fatty liver disease is a spectrum of disorders ranging from steatosis to non-alcoholic steatohepatitis (NASH). Steatosis of the liver is benign, whereas NASH can progress to cirrhosis or even hepatocellular carcinoma. Currently, a liver biopsy is the only validated method to distinct NASH from steatosis. AIM: The objective of this study was to identify a biomarker specific for NASH based on the N-glycosylation of serum proteins. METHODS: N-glycosylation patterns were assessed using DNA sequencer-assisted fluorophore-assisted capillary electrophoresis and compared with histology. RESULTS: Initially, a glycomarker (log[NGA2F]/[NA2]) was developed based on the results obtained in 51 obese non-alcoholic patients scheduled for bariatric surgery. Multivariate analysis showed that our glycomarker had the lowest P-value of all biomarkers in distinguishing NASH from steatosis (P=0.069). The glycomarker was validated in a cohort of 224 non-alcoholic fatty liver disease patients. In both pilot and validation study, glycomarker score increased in ascending amount of lobular inflammation (single-factor ANOVA, P≤0.001 and P=0.012, respectively). The N-glycan profile of immunoglobulin G in the NASH population confirmed the significantly increased undergalactosylation present in these patients. CONCLUSION: Our glycomarker specifically recognises liver inflammation in obese individuals which is the main trigger for the development of steatohepatitis and can differentiate between steatosis and NASH.
Authors:
Bram Blomme; Sven Francque; Eric Trépo; Louis Libbrecht; Dieter Vanderschaeghe; An Verrijken; Piet Pattyn; Yves Van Nieuwenhove; Dirk Van De Putte; Anja Geerts; Isabelle Colle; Joris Delanghe; Christophe Moreno; Luc Van Gaal; Nico Callewaert; Hans Van Vlierberghe
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-11-24
Journal Detail:
Title:  Digestive and liver disease : official journal of the Italian Society of Gastroenterology and the Italian Association for the Study of the Liver     Volume:  -     ISSN:  1878-3562     ISO Abbreviation:  -     Publication Date:  2011 Nov 
Date Detail:
Created Date:  2011-11-28     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100958385     Medline TA:  Dig Liver Dis     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011 Editrice Gastroenterologica Italiana S.r.l. Published by Elsevier Ltd. All rights reserved.
Affiliation:
Department of Hepatology and Gastroenterology, Ghent University Hospital, Ghent, Belgium.
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