Differential valine metabolism in adipose tissue of low and high fat-oxidizing obese subjects.
Proteomics Clin Appl
; 1(10): 1306-15, 2007 Oct.
Article
in En
| MEDLINE
| ID: mdl-21136627
ABSTRACT
Differences in fat metabolism are of importance in relation to energy balance. Low fat-oxidizers (LFO) are thought to be more prone for developing obesity. We studied whether LFO have different fasting adipose tissue (AT) protein profiles than high fat-oxidizers (HFO). Six LFO and six HFO subjects were selected from an obese group (nâ
=â
99, body mass index>30â
kg/m(2) ) taking part in a multi-center study (Nutrient-Gene interaction in human obesity) based on the postprandial fat oxidation capacity after a high fat load. AT protein profiles were studied by 2-DE. Differential proteins were clustered with MAPPfinder according to their function. Protein profiles of purified blood cells and adipocytes served to confine the comparison to adipocyte-specific proteins in AT profiles of LFO and HFO subjects. LFO had increased mitochondrial ROS scavengers possibly related to long-chain unsaturated fatty acid-induced increases in mitochondrial ROS-production. Carbohydrate oxidation seemed to be reduced since expression of several proteins from the glycolysis pathway was lower in LFO. Up-regulation of the valine catabolism at the level of methylmalonate-semialdehyde dehydrogenase appeared to be (part of) the compensatory mechanism. In conclusion, the fasting AT protein profile of LFO and HFO differ at the level of ROS scavenging, the glycolysis pathway and valine metabolism.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Type of study:
Clinical_trials
Language:
En
Journal:
Proteomics Clin Appl
Journal subject:
BIOQUIMICA
Year:
2007
Document type:
Article
Affiliation country:
Netherlands