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2018 ; 2018
(ä): 2784701
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Oxysterols Increase Inflammation, Lipid Marker Levels and Reflect Accelerated
Endothelial Dysfunction in Experimental Animals
#MMPMID29713239
Wielkoszy?ski T
; Zalejska-Fiolka J
; Strzelczyk JK
; Owczarek AJ
; Cholewka A
; Furma?ski M
; Stanek A
Mediators Inflamm
2018[]; 2018
(ä): 2784701
PMID29713239
show ga
OBJECTIVE: Oxidized cholesterol derivatives are thought to exert atherogenic
effect thus adversely affecting vascular endothelium. The aim of the study was to
assess the effect of 5?,6?-epoxycholesterol on experimentally induced
hypercholesterolemia in rabbits, and the levels of homocysteine (HCY), asymmetric
dimethylarginine (ADMA), paraoxonase-1 (PON-1), and inflammatory parameters
(IL-6, TNF-?, CRP). MATERIAL AND METHODS: The rabbits were divided into 3 groups,
8 animals each, and fed with basic fodder (C), basic fodder plus cholesterol (Ch)
or basic fodder plus 5?,6?-epoxycholesterol, and unoxidized cholesterol (ECh).
Serum concentrations of studied parameters were determined at 45-day intervals.
The study was continued for six months. RESULTS: We demonstrated that adding
5?,6?-epoxycholesterol to basic fodder significantly affected lipid status of the
experimental animals, increasing total cholesterol and LDL cholesterol levels, as
well as HCY and ADMA levels, whilst leaving the PON-1 activity unaffected.
Additionally, the ECh group presented with significantly higher concentrations of
inflammatory biomarkers (IL-6, TNF-?, and CRP). In the Ch group, lower yet
significant (as compared to the C group) changes of levels of studied parameters
were observed. CONCLUSION: Exposure of animals with experimentally induced
hypercholesterolemia to 5?,6?-epoxycholesterol increases dyslipidaemia,
endothelial dysfunction, and inflammatory response.