Fate of intravenously administered particulate and lipoprotein cholesterol in the rat
Unesterified radioactive cholesterol, both bound to serum lipoproteins and dispersed in ethanol–saline, was injected into bile fistula and intact rats. Due to phagocytosis, mainly by the liver macrophages, intravenously injected cholesterol in ethanol–saline disappears from the bloodstream significa...
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1972-01-01
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Online Access: | http://www.sciencedirect.com/science/article/pii/S0022227520394335 |
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doaj-4f8ded9005e841e9a4eb9447c318f14a2021-04-24T05:51:45ZengElsevierJournal of Lipid Research0022-22751972-01-011313238Fate of intravenously administered particulate and lipoprotein cholesterol in the ratÅke Nilason0D.B. Zilversmit1Graduate School of Nutrition, and Section of Biochemistry and Molecular Biology, Division of Biological Sciences, Cornell University, Ithaca, New York 14850Graduate School of Nutrition, and Section of Biochemistry and Molecular Biology, Division of Biological Sciences, Cornell University, Ithaca, New York 14850Unesterified radioactive cholesterol, both bound to serum lipoproteins and dispersed in ethanol–saline, was injected into bile fistula and intact rats. Due to phagocytosis, mainly by the liver macrophages, intravenously injected cholesterol in ethanol–saline disappears from the bloodstream significantly faster than lipoprotein-bound cholesterol.Soon after the initial phagocytosis, the particulate isotopic cholesterol started to reappear in blood, reaching a maximal radioactivity in blood 10–24 hr after injection. Although the radioactive cholesterol reappears in serum in both esterified and unesterified form, it is likely that cholesterol is released from the phagocytic cells as unesterified cholesterol which is then esterified intravascularly or at other sites. In the bile fistula rats, somewhat more of the lipoprotein cholesterol than of the particulate cholesterol appeared in bile early after injection. However, cholesterol turnover calculated from a twopool model was the same for rats injected with lipoprotein-bound or particulate cholesterol.http://www.sciencedirect.com/science/article/pii/S0022227520394335cholesterol particlesserum lipoproteincolloidal chromic phosphatephagocytosiscell isolationliver macrophages |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Åke Nilason D.B. Zilversmit |
spellingShingle |
Åke Nilason D.B. Zilversmit Fate of intravenously administered particulate and lipoprotein cholesterol in the rat Journal of Lipid Research cholesterol particles serum lipoprotein colloidal chromic phosphate phagocytosis cell isolation liver macrophages |
author_facet |
Åke Nilason D.B. Zilversmit |
author_sort |
Åke Nilason |
title |
Fate of intravenously administered particulate and lipoprotein cholesterol in the rat |
title_short |
Fate of intravenously administered particulate and lipoprotein cholesterol in the rat |
title_full |
Fate of intravenously administered particulate and lipoprotein cholesterol in the rat |
title_fullStr |
Fate of intravenously administered particulate and lipoprotein cholesterol in the rat |
title_full_unstemmed |
Fate of intravenously administered particulate and lipoprotein cholesterol in the rat |
title_sort |
fate of intravenously administered particulate and lipoprotein cholesterol in the rat |
publisher |
Elsevier |
series |
Journal of Lipid Research |
issn |
0022-2275 |
publishDate |
1972-01-01 |
description |
Unesterified radioactive cholesterol, both bound to serum lipoproteins and dispersed in ethanol–saline, was injected into bile fistula and intact rats. Due to phagocytosis, mainly by the liver macrophages, intravenously injected cholesterol in ethanol–saline disappears from the bloodstream significantly faster than lipoprotein-bound cholesterol.Soon after the initial phagocytosis, the particulate isotopic cholesterol started to reappear in blood, reaching a maximal radioactivity in blood 10–24 hr after injection. Although the radioactive cholesterol reappears in serum in both esterified and unesterified form, it is likely that cholesterol is released from the phagocytic cells as unesterified cholesterol which is then esterified intravascularly or at other sites. In the bile fistula rats, somewhat more of the lipoprotein cholesterol than of the particulate cholesterol appeared in bile early after injection. However, cholesterol turnover calculated from a twopool model was the same for rats injected with lipoprotein-bound or particulate cholesterol. |
topic |
cholesterol particles serum lipoprotein colloidal chromic phosphate phagocytosis cell isolation liver macrophages |
url |
http://www.sciencedirect.com/science/article/pii/S0022227520394335 |
work_keys_str_mv |
AT akenilason fateofintravenouslyadministeredparticulateandlipoproteincholesterolintherat AT dbzilversmit fateofintravenouslyadministeredparticulateandlipoproteincholesterolintherat |
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