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Flux of plasma lipoproteins into human arterial intima. Comparison between grossly normal and atheromatous intima.

Abstract：

:Arterial specimens were obtained from 12 patients during arterial repair surgery and 3 patients during nephrectomy following a bolus injection of autologous radio-iodinated very low density lipoprotein (VLDL) up to 30 h before surgery. Radioactivity in apoprotein B (apo B) was determined in lipoprotein fractions isolated from saline extracts of washed intima in the density ranges less than 1.006 g/ml, 1.006-1.019 g/ml and 1.019-1.063 g/ml [intimal VLDL, intermediate-(IDL) and low density lipoprotein (LDL), respectively]. Specific radioactivity of apo B was measured in corresponding plasma protein fractions. In atheromatous intima, minimum influx rates of VLDL-apo B [12.1 +/- 4.3 (SEM) ng . cm-1 . h-1] and IDL-apo B (13.6 +/- 5.1) over 24 h were significantly higher than fluxes of VLDL-apo B (1.2 +/- 0.34) and IDL-apo B (1.4 +/- 1.1) into normal intima (P less than 0.05). Minimum influx rate of LDL-apo B was also significantly higher in atheromatous intima (196 +/- 39) compared with normal intima (25.8 +/- 13.5, P less than 0.01) and was 16-18 fold higher than corresponding VLDL- and IDL-apo B fluxes in both types of intima. Collagenase digestion of intimal samples after saline extraction yielded further significant mass of VLDL but this fraction had little radioactivity compared with saline extractable VLDL.

journal_name

Atherosclerosis

journal_title

Atherosclerosis

authors

Nicoll A,Duffield R,Lewis B

doi

10.1016/0021-9150(81)90073-3

subject

Has Abstract

pub_date

1981-05-01 00:00:00

pages

229-42

issue

2

eissn

0021-9150

issn

1879-1484

pii

0021-9150(81)90073-3

journal_volume

39

pub_type

杂志文章

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