| Hepatic cholesterol metabolism following a chronic ingestion of cesium-137 starting at fetal stage in rats. | |
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MedLine Citation:
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PMID: 20173315 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The Chernobyl accident released many radionuclides in the environment. Some are still contaminating the ground and thus the people through dietary intake. The long-term sanitary consequences of this disaster are still unclear and several biological systems remain to be investigated. Cholesterol metabolism is of particular interest, with regard to the link established between atherosclerosis and exposure to high-dose ionizing radiations. This study assesses the effect of cesium-137 on cholesterol metabolism in rats, after a chronic exposure since fetal life. To achieve this, rat dams were contaminated with cesium-137-supplemented water from two weeks before mating until the weaning of the pups. Thereafter, the weaned rats were given direct access to the contaminated drinking water until the age of 9 months. After the sacrifice, cholesterol metabolism was investigated in the liver at gene expression and protein level. The cholesterolemia was preserved, as well as the cholesterol concentration in the liver. At molecular level, the gene expressions of ACAT 2 (a cholesterol storage enzyme), of Apolipoprotein A-I and of RXR (a nuclear receptor involved in cholesterol metabolism) were significantly decreased. In addition, the enzymatic activity of CYP27A1, which catabolizes cholesterol, was increased. The results indicate that the rats seem to adapt to the cesium-137 contamination and display modifications of hepatic cholesterol metabolism only at molecular level and within physiological range. |
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Authors:
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Radjini Racine; Line Grandcolas; Eric Blanchardon; Patrick Gourmelon; Georges Veyssiere; Maamar Souidi |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of radiation research Volume: 51 ISSN: 1349-9157 ISO Abbreviation: J. Radiat. Res. Publication Date: 2010 |
Date Detail:
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Created Date: 2010-03-04 Completed Date: 2010-05-25 Revised Date: 2012-03-28 |
Medline Journal Info:
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Nlm Unique ID: 0376611 Medline TA: J Radiat Res Country: Japan |
Other Details:
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Languages: eng Pagination: 37-45 Citation Subset: IM |
Affiliation:
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Institute for Radiological Protection and Nuclear Safety, Radiological Protection and Human Health Division, Radiobiology and Epidemiology Department, Laboratory of Experimental Toxicology, Fontenay-aux-Roses Cedex, France. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Administration, Oral Aging / metabolism*, radiation effects Animals Cesium Radioisotopes / administration & dosage* Cholesterol / metabolism* Female Liver / embryology, metabolism*, radiation effects* Male Pregnancy Pregnancy, Animal / metabolism* Prenatal Exposure Delayed Effects / metabolism Radiation Dosage Rats Rats, Sprague-Dawley |
| Chemical | |
Reg. No./Substance:
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0/Cesium Radioisotopes; 57-88-5/Cholesterol |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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