Abstract:
:The stereochemistry of fat digestion and absorption was studied by feeding a triacylglycerol analogue to rats with a thoracic duct cannula. The analogue, rac-1,2-dioleoyl-3-S-tetradecyl-3-thioglycerol-S-oxide was chosen since its enantiomers exhibited high rotation in optical rotary dispersion (ORD) and circular dichroism (CD). In the chyle, triacylglycerol was the major lipid but X-1,2-diacyl-3-S-tetradecyl-3-thioglycerol-S-oxide constituted 8% of lipid weight. It was resolved by thin-layer chromatography (TLC) into two diastereomers. Each of the diastereomers were analyzed for the proportions of 1-thio-sn-glycerol/3-thio-sn-glycerol isomers by ORD and CD. The 1-thio-sn-glycerol isomers dominated for both compounds indicating that they were enriched during the absorption processes, since a racemic compound was fed. The stereospecificities are probably exerted by acyltransferase(s) during chyle lipid synthesis. The methods used will be valuable tools in studies on the metabolism of enantiomeric glycerides and also for characterization of naturally occurring sulphur-containing lipids.
journal_name
Chem Phys Lipidsjournal_title
Chemistry and physics of lipidsauthors
Akesson B,Michelsen Pdoi
10.1016/0009-3084(81)90067-0subject
Has Abstractpub_date
1981-12-01 00:00:00pages
341-9issue
4eissn
0009-3084issn
1873-2941pii
0009-3084(81)90067-0journal_volume
29pub_type
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