title: [Oxidation of a naphthenic hydrocarbon, dodecylcyclohexane, in the rat].
abstract: Naphthenic hydrocarbons, mainly of fossil origin, are widespread in our environment, and contaminate the food chains; they are also used as food additives. Their fate in mammals is unknown, except for the fact that they are absorbed and accumulate in tissues. Only a few microorganisms have been shown capable or oxidising n-alkyl substituted cycloparaffins. In this study, dodecylcylohexane has been chosen as a typical monocycloparaffin, and has been administered orally to rats. The GLC and GLC-MS analysis of the methylesters of body and hepatic fatty acids led to the identification of cyclohexyldodecanoic and its decanoïc and octanoïc homologs. The alkyl chain undergoes a terminal oxidation followed by the classical beta-oxidation process. After administration of one 200 mg dose, or incorporation of 0.1% of the cycloparaffin in the diet for 2 months, these acids were found at low levels in neutral lipids and phospholipids. Their subsequent metabolic pathway and their possible interaction with the biochemical mechanisms involving phospholipids are under investigation.
mesh_terms: D000273:Adipose Tissue / Q000378:metabolism; D000473:Alkanes / Q000378:metabolism*; D000818:Animals; D002849:Chromatography, Gas; D003510:Cyclohexanes / Q000378:metabolism*; D005227:Fatty Acids / Q000378:metabolism; D050356:Lipid Metabolism; D008297:Male; D013058:Mass Spectrometry; D009928:Organ Specificity; D051381:Rats; D012867:Skin / Q000378:metabolism
chemical_list: D000473:Alkanes; D003510:Cyclohexanes; D005227:Fatty Acids; C014517:dodecylcyclohexane
vernacular_title: Mise en évidence de l'oxydation par le rat d'un hydrocarbure naphténique, le dodécylcyclohexane