Document Detail


In situ lipidomic analysis of nonalcoholic fatty liver by cluster TOF-SIMS imaging.
MedLine Citation:
PMID:  19296690     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Mass spectrometry imaging has been used to map liver biopsies of several patients suffering from nonalcoholic fatty liver disease. This steatosis is characterized by an accumulation of triacylglycerols and diacylglycerols in the liver. Using time-of-flight-secondary ion mass spectrometry (TOF-SIMS) with a bismuth cluster ion source, it has been possible to map lipids in situ at the micrometer scale and to simultaneously characterize their molecular distribution on liver sections. Accumulation of triacylglycerols, diacylglycerols, monoacylglycerols, fatty acids, with the apparition of myristic acid, together with a dramatic depletion of vitamin E and a selective macrovacuolar localization of cholesterol are observed in steatosis areas of fatty livers compared to control livers. These ion species are concentrated in small vesicles having a size of a few micrometers. Moreover, very fine differences in lipid localizations, depending on alkyl acid chain lengths of diacylglycerols and fatty acids, have been found after careful scrutiny of the ion images. Finally, TOF-SIMS has revealed lipid zonation in the normal human liver and accumulation of very similar lipids to those detected in areas of the fatty livers, which are not characterized as steatotic ones by the histological control performed on serial tissue sections.
Authors:
Delphine Debois; Marie-Pierre Bralet; François Le Naour; Alain Brunelle; Olivier Laprévote
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Analytical chemistry     Volume:  81     ISSN:  1520-6882     ISO Abbreviation:  Anal. Chem.     Publication Date:  2009 Apr 
Date Detail:
Created Date:  2009-04-14     Completed Date:  2009-06-11     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0370536     Medline TA:  Anal Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2823-31     Citation Subset:  IM    
Affiliation:
Institut de Chimie des Substances Naturelles, CNRS, UPR 2301, Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex, France.
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MeSH Terms
Descriptor/Qualifier:
Adult
Aged
Diglycerides / metabolism
Fatty Liver / metabolism*
Humans
Lipid Metabolism*
Liver / metabolism,  pathology
Mass Spectrometry
Middle Aged
Chemical
Reg. No./Substance:
0/Diglycerides

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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