Hypercholesterolemia represents a major risk factor of cardiovascular disease. A number of experimental models is used for study of hypercholesterolemia pathogenesis and therapy. This thesis concentrates on characterization of one of these models. Prague hereditary hypercholesterolemic (PHHC) rat is such a suitable model for study of hypercholesterolemia. Although the majority of plasma cholesterol is transported by high density lipoprotein in PHHC rat fed standard diet, PHHC rat fed cholesterol diet develops hypercholesterolemia comparable to that of humans. The advantage of this model is that hypercholesterolemia develops without the need for addition of bile acids or other hepatotoxic substances to the diet. The hypercholesterolemia of PHHC rat is caused by slowed down catabolism of cholesterol-rich very low density lipoprotein (VLDL). These cholesterol-rich particles are synthesized in the liver. We found out that PHHC rat fed 1% cholesterol diet accumulates cholesteryl esters (CE) in the liver and also in the VLDL. Acyl-CoA:cholesterol acyltransferase (ACAT) and microsomal triglyceride transfer protein (MTP) may participate in the increased incorporation CE into VLDL. We found out no difference in ACAT and MTP activities in the liver between PHHC rats and control animals. Neither ACAT activity...
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:323578 |
| Date | January 2013 |
| Creators | Rybáková, Kateřina |
| Contributors | Vlachová, Miluše, Poledne, Rudolf |
| Source Sets | Czech ETDs |
| Language | Czech |
| Detected Language | English |
| Type | info:eu-repo/semantics/masterThesis |
| Rights | info:eu-repo/semantics/restrictedAccess |
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