scholarly journals Antioxidation Effect of Simvastatin in Aorta and Hippocampus: A Rabbit Model Fed High-Cholesterol Diet

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Guangyin Zhang ◽  
Ming Li ◽  
Yinzhi Xu ◽  
Li Peng ◽  
Cui Yang ◽  
...  
Keyword(s):  
Critical Role ◽  
Rabbit Model ◽  
Statin Treatment ◽  
High Cholesterol Diet ◽  
Brain Protection ◽  
High Cholesterol ◽  
Stress Injury ◽  
Activity Increase ◽  
Injury Progression ◽  
First Time

We show that hypercholesterolemia contributes to oxidative stress injury progression in brain and simvastatin counteracts the cholesterol-induced peroxidation injury in rabbit hippocampus, and we demonstrate for the first time that the simvastatin is a critical role in brain protection and identify HO-1 and other related antioxidant enzymes as molecular target for active redox compounds. Second, our experiments have pointed out an association between statin treatment and a decrease in the risk of having peroxidation damage of brain. The balance effects of simvastatin to ROS and antioxidants enzymes network are most probably due to improved SOD functional activity, increase in GSH-Px, increase in HO-1 expression, and decrease of MDA generation.

Simvastatin Reduces Expression and Activity of Lipoprotein-Associated Phospholipase A2 in the Aorta of Hypercholesterolaemic Atherosclerotic Rabbits

2009 ◽  
Vol 37 (4) ◽  
pp. 1029-1037 ◽  
Author(s):  
Z Qiao ◽  
J Ren ◽  
H Chen
Keyword(s):  
Atherosclerotic Lesion ◽  
Statin Treatment ◽  
Control Group ◽  
High Cholesterol Diet ◽  
Atherosclerotic Plaques ◽  
Cholesterol Diet ◽  
High Cholesterol ◽  
Local Inflammatory Response ◽  
Plaque Instability ◽  
Significant Difference

Lipoprotein-associated phospholipase A2 (Lp-PLA2) contributes to atherosclerotic plaque instability and subsequent sudden coronary death. Statins are associated with decreased stroke risk and may improve stability of atherosclerotic plaques. The present study investigated the effect of simvastatin on expression of Lp-PLA2 levels in atherosclerotic plaques and on Lp-PLA2 activity in atherosclerotic aortas. Rabbits were a fed chow (control group) or a high-cholesterol diet (atherosclerosis group) for 12 weeks. An additional group on the high-cholesterol diet received simvastatin (5 mg/kg per day) for the last 4 weeks (simvastatin group). Lp-PLA2 activity in plasma and atherosclerotic aortas was significantly higher in the atherosclerosis group than in the control group and, consistent with this, abundant Lp-PLA2 protein was detected in plaques in the atherosclerosis group. Simvastatin significantly reduced Lp-PLA2 activity in plasma and aorta tissue, and reduced Lp-PLA2 protein level in atherosclerotic plaques. Whereas there was no significant difference in total atherosclerotic lesion area between simvastatin and atherosclerosis groups, simvastatin significantly reduced macrophage content, lipid retention and the intima/media ratio but increased the content of smooth muscle cells in atherosclerotic lesions. Thus, statin treatment markedly reduced Lp-PLA2 in both plasma and atherosclerotic plaques. This was associated with attenuation of the local inflammatory response and improved plaque stability.

scholarly journals Evaluation of the Hypocholesterolemic Effect and Phytochemical Screening of the Hydroethanolic Extract of Crataegus Aronia from Jordan

2012 ◽  
Vol 7 (1) ◽  
pp. 1934578X1200700 ◽  
Author(s):  
Entisar K. Al-Hallaq ◽  
Fatma U. Afifi ◽  
Shtaywy S. Abdalla
Keyword(s):  
Low Density Lipoprotein ◽  
Density Lipoprotein ◽  
High Cholesterol Diet ◽  
Hypocholesterolemic Effect ◽  
Cholesterol Diet ◽  
Phytochemical Screening ◽  
High Cholesterol ◽  
Chemical Screening ◽  
Hydroethanolic Extract ◽  
First Time

Chemical screening of the leaves and flowers of Crataegus aronia resulted in the isolation of hyperoside, quercetin, rutin and β-sitosterol for the first time from this plant. The effects of the hydroethanolic extract of C. aronia (CAHE) on hypercholesterolemic rats were investigated. The rats, treated orally for four weeks with 400 mg/kg/day CAHE, exhibited significant decreases in serum total cholesterol (TC) and low-density lipoprotein (LDL). The results were compared with those obtained after oral administration of atorvastatin (10 mg/kg/day). Furthermore, 10-week daily co-administration of a high cholesterol diet and CAHE (200 mg/kg/day) prevented the increase in TC and LDL. These observations indicate that CAHE has a hypocholesterolemic effect.

scholarly journals Comparison of the Protective Effects of Individual Components of Particulatedtrans-Sialidase (PTCTS), PTC and TS, against High Cholesterol Diet-Induced Atherosclerosis in Rabbits

2017 ◽  
Vol 2017 ◽  
pp. 1-12 ◽  
Author(s):  
Shérrira M. Garavelo ◽  
Maria de Lourdes Higuchi ◽  
Jaqueline J. Pereira ◽  
Marcia M. Reis ◽  
Joyce T. Kawakami ◽  
...  
Keyword(s):  
Mycoplasma Pneumoniae ◽  
Abdominal Aorta ◽  
Oxidized Ldl ◽  
Rabbit Model ◽  
Lipid Lowering ◽  
High Cholesterol Diet ◽  
Protective Effects ◽  
Cholesterol Diet ◽  
High Cholesterol ◽  
Plaque Area

Previous studies showed the presence ofMycoplasma pneumoniae(M. pneumoniae) and membrane-shed microparticles (MPs) in vulnerable atherosclerotic plaques. H&S Science and Biotechnology developed PTCTS, composed by natural particles from medicinal plants (PTC) combined withtrans-Sialidase (TS), to combat MPs andMycoplasma pneumoniae. Our aim was to determine the effects of the different components of PTCTS in a rabbit model of atherosclerosis. Rabbits were fed with high cholesterol diet for 12 weeks and treated during the last 6 weeks with either vehicle, PTC, TS, or PTCTS. Lipid profile and quantification of MPs positive forMycoplasma pneumoniaeand oxidized LDL antigens were carried out. Aortas and organs were then histologically analyzed. PTCTS reduced circulating MPs positive forMycoplasma pneumoniaeand oxidized LDL antigens, reduced the plaque area in the abdominal aorta, and caused positive remodeling of the ascendant aorta. PTC caused positive remodeling and reduced plaque area in the abdominal aorta; however, TS had a lipid lowering effect. PTCTS components combined were more effective against atherosclerosis than individual components. Our data reinforce the infectious theory of atherosclerosis and underscore the potential role of circulating MPs. Therefore, the removal ofMycoplasma-derived MPs could be a new therapeutic approach in the treatment of atherosclerosis.

scholarly journals Attenuated Combined Action of Cyclosporine A and Hyperlipidemia on Atherogenesis in Rabbits by Thymoquinone

2011 ◽  
Vol 2011 ◽  
pp. 1-9 ◽  
Author(s):  
Ahmed Ragheb ◽  
Ahmed Attia ◽  
Fawzy Elbarbry ◽  
Kailash Prasad ◽  
Ahmed Shoker
Keyword(s):  
Oxidative Stress ◽  
Cyclosporine A ◽  
Rabbit Model ◽  
Group Iv ◽  
Control Group ◽  
High Cholesterol Diet ◽  
Aortic Atherosclerosis ◽  
Cholesterol Diet ◽  
High Cholesterol ◽  
Group I

This descriptive study investigates in a rabbit model of atherosclerosis (i) the extent of atherogenesis induced by cyclosporine A (CsA) or hyperlipidemia alone or in combination and (ii) whether thymoquinone (TQ), a known herbal antioxidant, offers protection against these effects. New Zealand White female rabbits were assigned to five groups of six animals each: Group I, control; Group II, CsA [25 mg kg−1day−1orally (PO)]; Group III, 1% cholesterol; Group IV, 1% cholesterol + CsA (25 mg kg−1day−1PO); and Group V, 1% cholesterol + CsA (25 mg kg−1day−1PO) + TQ (10 mg kg−1day−1PO). Lipids and oxidative stress parameters [Malondialdehyde (MDA) and protein carbonyl] and aortic atherosclerosis were compared. CsA alone did not show a significant effect on either serum lipids and did not induce atherosclerosis. High-cholesterol diet induced atherosclerosis (45 ± 11% of the intimal surface of aorta was covered with atherosclerotic plaques). CsA and high-cholesterol diet increased atherosclerosis severity as measured from intimal and media lesions, but did not affect the extent of atherosclerosis. TQ decreased aortic MDA by 83%. It was also associated with reduced aortic atherosclerosis extend by 52% compared with Group IV. We concluded that (i) CsA aggravates hyperlipidemia-induced atherosclerosis and (ii) TQ attenuates the oxidative stress and atherogenesis induced by the combined effect of CsA and hyperlipidemia.

scholarly journals Temporal and Quantitative Analysis of Atherosclerotic Lesions in Diet-Induced Hypercholesterolemic Rabbits

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Qi Yu ◽  
Yafeng Li ◽  
Ahmed Bilal Waqar ◽  
Yanli Wang ◽  
Bingqiao Huang ◽  
...  
Keyword(s):  
Plasma Cholesterol ◽  
Rabbit Model ◽  
Cellular Component ◽  
High Cholesterol Diet ◽  
Atherosclerotic Plaques ◽  
High Cholesterol ◽  
Ideal Model ◽  
Atherosclerotic Lesions ◽  
Cholesterol Levels ◽  
Transmission Electron

The diet-induced atherosclerotic rabbit is an ideal model for atherosclerosis study, but temporal changes in atherosclerotic development in hypercholesterolemic rabbits are poorly understood. Japanese white rabbits were fed a high-cholesterol diet to induce sustained hypercholesterolemia, and each group of 10–12 animals was then sacrificed at 6, 12, 16, or 28 weeks. The rabbit aortas were harvested, and the sizes of the gross and intima atherosclerotic lesions were quantified. The cellular component of macrophages (Mφs) and smooth muscle cells (SMCs) in aortic intimal lesions was also quantified by immunohistochemical staining, and the correlation between plasma cholesterol levels and the progress of atherosclerotic lesions was studied. The ultrastructure of the atherosclerotic lesions was observed by transmission electron microscopy (TEM). Widely variable atherosclerotic plaques were found from 6 weeks to 28 weeks, and the lesional progress was closely correlated with cholesterol exposure. Interestingly, a relatively reduced accumulation of Mφ, an increased numbers of SMCs, and a damaged endothelial layer were presented in advanced lesions. Moreover, SMCs were closely correlated with cholesterol exposure and lesional progress for the whole period. Cholesterol exposure directly determines atherosclerotic progress in a rabbit model, and the changes in the cellular component of advanced lesions may affect plaque stability in an atherosclerotic rabbit model.

Hypolipidemic and antioxidant effect of Ajuga iva in rats fed a high-cholesterol diet

Planta Medica ◽  
2006 ◽  
Vol 72 (11) ◽  
Author(s):  
MA Lacaille-Dubois ◽  
A Chenni ◽  
DA Yahia ◽  
FO Boukortt ◽  
J Prost ◽  
...  
Keyword(s):  
Antioxidant Effect ◽  
High Cholesterol Diet ◽  
Cholesterol Diet ◽  
High Cholesterol

Serum lipoproteins of diabetic rats fed a high cholesterol diet

Diabetes ◽  
1980 ◽  
Vol 29 (10) ◽  
pp. 774-777 ◽  
Author(s):  
C. M. Arbeeny ◽  
D. Edelstein ◽  
S. R. Freedman ◽  
H. A. Eder
Keyword(s):  
Diabetic Rats ◽  
High Cholesterol Diet ◽  
Cholesterol Diet ◽  
Serum Lipoproteins ◽  
High Cholesterol
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