当前位置： SCI文献检索 > ATHEROSCLEROSIS期刊下所有文献 > Comparison of the metabolism of [1,2,6,7-3H(N)]cholesteryl oleate, cholesteryl [9,10-3H]oleate, and cholesteryl [1-14C]oleate labeled lipoproteins in the rat.

Comparison of the metabolism of [1,2,6,7-3H(N)]cholesteryl oleate, cholesteryl [9,10-3H]oleate, and cholesteryl [1-14C]oleate labeled lipoproteins in the rat.

Abstract：

:The intravascular metabolism of sterol labeled [1,2,6,7-3H(N)]cholesteryl oleate and acyl labeled cholesteryl [9,10-3H]oleate and cholesteryl [1-14C]oleate was compared in the rat, an animal species without plasma cholesteryl ester transfer activity (CETA). In a first series of studies, the metabolism of sterol labeled [1,2,6,7-3H(N)]cholesteryl oleate and acyl labeled cholesteryl [1-14C]oleate was compared, and the two tracers had identical plasma clearance rates when incorporated into human low density lipoproteins (LDL). The 3H sterol labeled cholesteryl ester (CE), however, had a plasma clearance rate lower than the 14C acyl labeled CE when incorporated into rat alpha- and beta-migrating LDL and human or rat high density lipoproteins (HDL). Unesterified 3H cholesterol reappeared in the plasma whereas the 14C radioactivity in the plasma remained associated with the CE. In a second set of studies, LDL and HDL were radiolabeled with cholesteryl [9,10-3H]oleate and cholesteryl [1-14C]oleate. Large amounts of 3H radioactivity that were dialyzable and not associated with the lipoprotein CE reappeared in the plasma during the kinetic studies. The two tracers had identical plasma disappearance rates when the plasma samples were dialyzed. The results of these studies indicate that the nature of the tracer used to trace lipoprotein CE can affect the estimated kinetic parameters of plasma CE.

journal_name

Atherosclerosis

journal_title

Atherosclerosis

authors

Terpstra AH

doi

10.1016/0021-9150(94)90125-2

subject

Has Abstract

pub_date

1994-04-01 00:00:00

pages

203-11

issue

2

eissn

0021-9150

issn

1879-1484

pii

0021-9150(94)90125-2

journal_volume

106

pub_type

杂志文章

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