title: Lymphatic transport of dietary cholesterol oxidation products, cholesterol and triacylglycerols in rats.
abstract: Rats were fed on a diet containing 0.5% cholesterol oxidation products (oxysterols) or 0.5% cholesterol for 30 min, and their lymph was collected for 7 h. The amount of each of the individual oxysterols absorbed in the lymph depended on the ingested amounts, but the recovery was the highest for 5alpha,6alpha-epoxycholesterol (10.5%), this being followed by 7-ketocholesterol (5.8%), cholestanetriol (5.2%), 7beta-hydroxycholesterol (4.8%), 7alpha-hydroxycholesterol (3.4%), 5beta,6beta-epoxycholesterol (2.2%), and 25-hydroxycholesterol (1.8%). A diet enriched with oxysterol, but not cholesterol, resulted in increased transport of triacylglycerols in the lymph. These results suggest that the absorption rate of oxysterols depends on the type, and indicate that the effect of dietary oxysterols on the lymphatic transport of triacylglycerols differs from that of dietary cholesterol. It therefore remains to be determined which oxysterol was responsible for the triacyglycerol transport.
authors.affiliation: Division of Bioresource and Bioenvironmental Sciences, Graduate School, Kyushu University, Fukuoka, Japan.
authors.forename: Hiroko
authors.initials: H
authors.lastname: Tomoyori
authors.forename: Octavio
authors.initials: O
authors.lastname: Carvajal
authors.forename: Masahiro
authors.initials: M
authors.lastname: Nakayama
authors.forename: Taiji
authors.initials: T
authors.lastname: Kishi
authors.forename: Masao
authors.initials: M
authors.lastname: Sato
authors.forename: Ikuo
authors.initials: I
authors.lastname: Ikeda
authors.forename: Katsumi
authors.initials: K
authors.lastname: Imaizumi
mesh_terms: D000818:Animals; D002784:Cholesterol / Q000031:analogs & derivatives* / Q000378:metabolism*; D002791:Cholesterol, Dietary / Q000378:metabolism*; D008401:Gas Chromatography-Mass Spectrometry; D007700:Kinetics; D008196:Lymph / Q000378:metabolism*; D008297:Male; D010084:Oxidation-Reduction; D051381:Rats; D017207:Rats, Sprague-Dawley; D013997:Time Factors; D014280:Triglycerides / Q000378:metabolism*
chemical_list: D002791:Cholesterol, Dietary; D014280:Triglycerides; D002784:Cholesterol