scholarly journals Modulation of the regression of atherosclerosis in the hamster by dietary lipids: comparison of coconut oil and olive oil

1999 ◽  
Vol 82 (5) ◽  
pp. 401-409 ◽  
Author(s):  
E. Heather Mangiapane ◽  
Martina A. McAteer ◽  
G. Martin Benson ◽  
David A. White ◽  
Andrew M. Salter
Keyword(s):  
Olive Oil ◽  
Aortic Arch ◽  
Syrian Hamster ◽  
Ldl Cholesterol ◽  
Coconut Oil ◽  
Hdl Cholesterol ◽  
Lesion Size ◽  
Ascending Aorta ◽  
Dietary Lipids ◽  
Golden Syrian Hamster

The Golden Syrian hamster (Mesocricetus auratus) has been shown to be a useful model of both human lipoprotein metabolism and the development of atherosclerosis. We report the effects of dietary lipids on the progression and regression of atherosclerosis in this model. In the first study, hamsters fed on coconut oil (150 g/kg diet) and cholesterol (30 g/kg diet) developed lipid-rich lesions in the ascending aorta (0·28 (sd 0·14) mm2) and aortic arch (0·01 (sd 0·01) mm2) after 4 weeks that continued to progress over the next 8 weeks (0·75 (sd 0·41) mm2 and 0·12 (sd 0·11) mm2 for the ascending aorta and aortic arch respectively). Removal of cholesterol from the diet halted this progression. Furthermore, in animals fed on olive oil in the absence of added cholesterol, plasma LDL-cholesterol concentrations were lower (P < 0·05) and the extent of atherosclerotic lesions was reduced (P < 0·001 for both regions of the aorta) compared with animals fed on coconut oil (with no added cholesterol). In a second study, animals were fed on the atherogenic diet for 10 weeks, transferred to diets containing either coconut oil (150 g/kg diet) or olive oil (150 g/kg diet) without added cholesterol and monitored for up to 16 weeks. In the ascending aorta, lesion size doubled in animals fed on coconut oil but stabilized in those fed on olive oil. In the aortic arch, lesion size decreased linearly (P < 0·05, P < 0·001 for coconut oil and olive oil respectively) with the greatest reduction being seen in the olive-oil-fed animals (P < 0·05). Again, progression and regression of atherosclerosis appeared to reflect the relative concentrations of LDL-cholesterol and HDL-cholesterol in the plasma. We conclude that the male Golden Syrian hamster represents a useful model of dietary induced regression as well as progression of atherosclerosis.

scholarly journals Antiatherogenic Effect of Simvastatin Is Not Due to Decrease of LDL Cholesterol in Ovariectomized Golden Syrian Hamster

2010 ◽  
pp. 401-406
Author(s):  
J Pitha ◽  
D Bobková ◽  
J Kovář ◽  
J Havlíčková ◽  
R Poledne
Keyword(s):  
Syrian Hamster ◽  
Serum Lipids ◽  
Ldl Cholesterol ◽  
Hdl Cholesterol ◽  
Golden Syrian Hamster ◽  
Simvastatin Treatment ◽  
Delayed Treatment ◽  
Antiatherogenic Effect ◽  
Hypercholesterolemic Diet ◽  
Atherosclerotic Changes

The changes of the composition of blood lipoproteins caused by menopause could also change the effect of hypolipidemic therapy. Using an experimental model we studied the changes of serum lipids and the effect of immediate or delayed treatment with simvastatin on atherosclerosis after surgical menopause. Female golden Syrian hamster aged 6 months were fed hypercholesterolemic diet during the whole study. Atherosclerotic changes in thoracic and abdominal aortas were assessed by stereomicroscopic method after 12 weeks. Four experimental groups were studied: sham-operated animals (n=5), ovariectomized animals (n=9), ovariectomized animals treated for 12 weeks (n=10), and ovariectomized animals treated 4 weeks after ovariectomy for 8 weeks (n=9). The dose of simvastatin was 10 mg/kg of body weight. After 12 weeks, ovariectomized animals had tenfold higher concentration of triglycerides in LDL fraction and significantly higher prevalence of atherosclerosis than animals without ovariectomy. Treatment with simvastatin substantially decreased the prevalence of atherosclerotic changes, but otherwise did not change individual serum lipids including LDL cholesterol. However, it improved proportions of pro- and antiatherogenic serum lipids mainly by the increase of HDL cholesterol. The timing of simvastatin treatment had no significant effect on atherosclerotic changes or lipid parameters. Simvastatin treatment partly prevented atherosclerotic changes induced by ovariectomy. This effect was not mediated by decrease of LDL cholesterol, but by increase in HDL cholesterol.

scholarly journals Dietary cholesterol reduces lipoprotein lipase activity in the atherosclerosis-susceptible Bio F1B hamster

2003 ◽  
Vol 89 (3) ◽  
pp. 341-350 ◽  
Author(s):  
Martina A. McAteer ◽  
David C. Grimsditch ◽  
Martin Vidgeon-Hart ◽  
G. Martin Benson ◽  
Andrew M. Salter
Keyword(s):  
Lipoprotein Lipase ◽  
Lipase Activity ◽  
Plasma Cholesterol ◽  
Dietary Cholesterol ◽  
Lipoprotein Metabolism ◽  
Coconut Oil ◽  
Hdl Cholesterol ◽  
High Cholesterol Diet ◽  
Lipoprotein Lipase Activity ◽  
Golden Syrian Hamster

We have compared lipoprotein metabolism in, and susceptibility to atherosclerosis of, two strains of male Golden Syrian hamster, the Bio F1B hybrid and the dominant spot normal inbred (DSNI) strain. When fed a normal low-fat diet containing approximately 40 g fat and 0·3 g cholestero/g, triacylglycerol-rich lipoprotein (chylomicron+VLDL) and HDL-cholesterol were significantly higher (P<0·001) in Bio F1B hamsters than DSNI hamsters. When this diet was supplemented with 150 g coconut oil and either 0·5 or 5·0 g cholestero/g, significant differences were seen in response. In particular, the high-cholesterol diet produced significantly greater increases in plasma cholesterol and triacylglycerol in the Bio F1B compared with the DSNI animals (P=0·002 and P<0·001 for cholesterol and triacylglycerol, respectively). This was particularly dramatic in non-fasting animals, suggesting an accumulation of chylomicrons. In a second experiment, animals were fed 150 g coconut oi/g and 5·0 g cholestero/g for 6 and 12 months. Again, the Bio F1B animals showed dramatic increases in plasma cholesterol and triacylglycerol, and this was confirmed as primarily due to a rise in chylomicron concentration. Post-heparin lipoprotein lipase activity was significantly reduced (P<0·001) in the Bio F1B compared with the DSNI animals at 6 months, and virtually absent at 12 months. Bio F1B animals were also shown to develop significantly more (P<0·001) atherosclerosis. These results indicate that, in the Bio F1B hybrid hamster, cholesterol feeding reduces lipoprotein lipase activity, thereby causing the accumulation of chylomicrons that may be associated with their increased susceptibility to atherosclerosis.

The latest research on coconut oil and human health

2021 ◽  
Vol 32 (10) ◽  
pp. 28-29
Author(s):  
Rebecca Guenard ◽  
Keyword(s):  
Clinical Trials ◽  
Total Cholesterol ◽  
Ldl Cholesterol ◽  
Meta Analysis ◽  
Coconut Oil ◽  
Hdl Cholesterol ◽  
Blood Lipid ◽  
Oil Consumption ◽  
Controlled Clinical Trials ◽  
Human Adults

A meta-analysis of clinical trials comparing the effects of coconut oil consumption with other fats focused only on controlled clinical trials performed on human adults with a duration exceeding two weeks (long enough to let blood lipid concentrations stabilize).coconut oil consumption significantly increased total cholesterol, LDL-cholesterol, and HDL-cholesterol concentrations compared with non-tropical vegetable oils and significantly increased total cholesterol and LDL-cholesterol concentrations compared with palm oil.

scholarly journals PENGARUH DIET EMULSI VIRGIN COCONUT OIL (VCO) TERHADAP PROFIL LIPID TIKUS PUTIH (Rattus norvegicus)

2020 ◽  
Vol 17 (1) ◽  
pp. 18
Author(s):  
FETI FATIMAH ◽  
BARLINA RINDENGAN
Keyword(s):  
Lipid Profile ◽  
Total Cholesterol ◽  
Rattus Norvegicus ◽  
Ldl Cholesterol ◽  
Coconut Oil ◽  
Hdl Cholesterol ◽  
Virgin Coconut Oil ◽  
Group I ◽  
Study Results ◽  
Pap Method

<p>ABSTRAK</p><p>Virgin Coconut Oil (VCO) merupakan salah satu produk panganfungsional yang populer di masyarakat. Cita rasa VCO dapat diperkayadalam bentuk emulsi mengandung sari buah nenas. Penelitian inidilakukan untuk mengetahui pengaruh diet emulsi VCO terhadap profillipid tikus (Rattus norvegicus) yang sebelumnya diinduksi hiperlipidemiadengan lemak babi 180g/100g ransum dan kuning telur bebek dengandosis 4 ml/hari. Penelitian dilakukan bulan Januari sampai Desember 2009di Laboratorium Balai Penelitian Tanaman Kelapa dan Palma Lain(BALITKA), Laboratorium FMIPA Universitas Sam Ratulangi Manado,Laboratorium UPHP (Unit Penelitian Hewan Percobaan) UniversitasGadjah Mada Yogyakarta serta Laboratorium PAU IPB Bogor. Delapanbelas tikus dibagi secara acak ke dalam 3 kelompok (6 tikus perkelompok). Kelompok I adalah kelompok kontrol yang diberi akuades,kelompok II diberi diet emulsi VCO, dan kelompok III diberi diet VCOmurni. Kandungan kolesterol total, HDL, LDL, dan triasilgliserol diukursetelah akhir perlakuan dengan metode enzimatik. Kadar kolesterol totaldiukur menggunakan metode CHOD-PAP, kadar kolesterol LDLmenggunakan metode PVS, kadar kolesterol HDL menggunakan metodeCHOD-PAP dan kadar triasil gliserol menggunakan metode GPO-PAP.Hasil penelitian menunjukkan bahwa konsumsi 0,945ml/hari VCO dan3,78ml/hari emulsi VCO selama 7 hari dapat menurunkan kadar kolesteroltotal, kadar kolesterol LDL, serta meningkatkan kadar kolesterol HDLdarah tikus Wistar secara signifikan (=0,05), sedangkan penurunan kadartriasilgliserol hanya ditunjukkan oleh konsumsi emulsi VCO (=0,05).Dengan demikian, emulsi VCO yang diperkaya dengan sari buah nenasberperan lebih baik dari VCO murni dalam menurunkan kolesterol padahewan uji tikus.</p><p>Kata kunci: Virgin coconut oil (VCO), emulsi VCO, profil lemak</p><p>ABSTRACT</p><p>Effect of Virgin Coconut Oil (VCO) Emulsion Diet onLipid Profile of White Rats (Rattus norvegicus)</p><p>Virgin Coconut Oil (VCO) is a functional food product that ispopular in the society. VCO-emulsion is a VCO emulsified with pineapplejuice. This study was conducted to find out the effect of VCO-emulsiondiet on lipid profile of mouse (Rattus norvegicus) strain wistar which wasalready treated by inducting hyperlipidemia using lard (180g/100g) andyolk (4ml/days). This research was conducted from January to December2009 at the Laboratory of Coconut and Other Palm Trees ResearchInstitute (BALITKA), the Laboratory of FMIPA Sam Ratulangi UniversityManado, the Laboratory of Experiment Animal Research Unit GadjahMada University Yogyakarta, and the Laboratory of PAU IPB Bogor.Eighteen mice were randomly divided into 3 groups. Group I was thecontrol group treated with aquadest only, group II was treated with VCO-emulsion diet, and group III was treated with pure VCO diet. The contentof total cholesterol, HDL, LDL, and triacylglicerol were measured at theend of the treatment using enzymatic method. In this study, there weresome methods used for measurements: CHOD-PAP method for level oftotal cholesterol, PVS method for level of LDL cholesterol, CHOD-PAPmethod for level of HDL cholesterol, and GPO-PAP method for measuringlevel of triacylglicerol. The study results showed that diet of 0.945ml/daysof VCO and 3.78ml/days of VCO emulsion for 7 days significantlydecreased the level of total cholesterol and the level of LDL cholesterol,and increased the level of HDL cholesterol in the blood of Wistar mouse(α=0.05). Whereas it was shown that only by diet of VCO emulsion(α=0.05) decreased the level of triacylglicerol. Thus, VCO emulsionsignificantly lowered cholesterol in the experimental mouse better thanpure VCO diet only.</p><p>Key words : Virgin coconut oil(VCO) , VCO emulsion, lipid profile</p>

Effect of intestinal alkalinization on irinotecan (CPT-11)-induced diarrhea in the golden Syrian hamster model

2001 ◽  
Vol 120 (5) ◽  
pp. A613-A613
Author(s):  
T IKEGAMI ◽  
P LATHAM ◽  
K KOBAYASHI ◽  
K ARIMORI ◽  
B BOUSCAREL
Keyword(s):  
Syrian Hamster ◽  
Hamster Model ◽  
Golden Syrian Hamster

Dilatation of the entire thoracic aorta in patients with bicuspid aortic valve: a magnetic resonance angiography study

VASA ◽  
2005 ◽  
Vol 34 (3) ◽  
pp. 181-185 ◽  
Author(s):  
Westhoff-Bleck ◽  
Meyer ◽  
Lotz ◽  
Tutarel ◽  
Weiss ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Magnetic Resonance Angiography ◽  
Aortic Valve ◽  
Pulmonary Artery ◽  
Aortic Arch ◽  
Thoracic Aorta ◽  
Aortic Root ◽  
Ascending Aorta ◽  
Descending Aorta ◽  
Severe Aortic Regurgitation

Background: The presence of a bicuspid aortic valve (BAV) might be associated with a progressive dilatation of the aortic root and ascending aorta. However, involvement of the aortic arch and descending aorta has not yet been elucidated. Patients and methods: Magnetic resonance angiography (MRA) was used to assess the diameter of the ascending aorta, aortic arch, and descending aorta in 28 patients with bicuspid aortic valves (mean age 30 ± 9 years). Results: Patients with BAV, but without significant aortic stenosis or regurgitation (n = 10, mean age 27 ± 8 years, n.s. versus control) were compared with controls (n = 13, mean age 33 ± 10 years). In the BAV-patients, aortic root diameter was 35.1 ± 4.9 mm versus 28.9 ± 4.8 mm in the control group (p < 0.01). The diameter of the ascending aorta was also significantly increased at the level of the pulmonary artery (35.5 ± 5.6 mm versus 27.0 ± 4.8 mm, p < 0.001). BAV-patients with moderate or severe aortic regurgitation (n = 18, mean age 32 ± 9 years, n.s. versus control) had a significant dilatation of the aortic root, ascending aorta at the level of the pulmonary artery (41.7 ± 4.8 mm versus 27.0 ± 4.8 mm in control patients, p < 0.001) and, furthermore, significantly increased diameters of the aortic arch (27.1 ± 5.6 mm versus 21.5 ± 1.8 mm, p < 0.01) and descending aorta (21.8 ± 5.6 mm versus 17.0 ± 5.6 mm, p < 0.01). Conclusions: The whole thoracic aorta is abnormally dilated in patients with BAV, particularly in patients with moderate/severe aortic regurgitation. The maximum dilatation occurs in the ascending aorta at the level of the pulmonary artery. Thus, we suggest evaluation of the entire thoracic aorta in patients with BAV.

Surgery of the ascending aorta and the aortic arch through partial upper sternotomy

2010 ◽  
Vol 58 (S 01) ◽  
Author(s):  
H Deschka ◽  
M Machner ◽  
S El Dsoki ◽  
A Alken ◽  
G Wimmer-Greinecker
Keyword(s):  
Aortic Arch ◽  
Ascending Aorta

Platelet Aggregation and Plasma Lipoproteins in Alcoholics During Alcohol Withdrawal

1986 ◽  
Vol 55 (02) ◽  
pp. 173-177 ◽  
Author(s):  
K Desai ◽  
J S Owen ◽  
D T Wilson ◽  
R A Hutton
Keyword(s):  
Platelet Aggregation ◽  
Alcohol Withdrawal ◽  
Ldl Cholesterol ◽  
Low Density Lipoprotein ◽  
Density Lipoprotein ◽  
Hdl Cholesterol ◽  
Plasma Lipoprotein ◽  
Cholesterol Concentration ◽  
Arachidonic Acid Content ◽  
Low Density

SummaryPlatelet aggregation, platelet lipid composition and plasma lipoprotein concentrations were measured each week in a group of seventeen alcoholics, without overt liver disease, for one month, following acute, total alcohol withdrawal. The platelets were initially hypoaggregable but, within 1-2 weeks of cessation of drinking, they became hyperaggregable and then gradually returned towards normal values. Hyperaggregability could not be explained by increases in either the cholesterol or the arachidonic acid content of the platelets. Plasma very-low-density lipoprotein cholesterol levels remained high throughout the study, but the initially raised levels of high-density lipoprotein (HDL) cholesterol fell by 26%. Low-density lipoprotein (LDL) cholesterol concentration rose by 10% after two weeks of withdrawal but then returned to about the starting level. The resulting changes in the plasma LDL-cholesterol: HDL-cholesterol ratio, which had increased by more than 50% after two weeks of abstinence, essentially paralleled the time course of enhanced platelet reactivity in all but four of the alcoholics. These findings suggest that alterations in plasma lipoprotein concentrations during acute alcohol withdrawal may be a contributory factor to the haemostatic disorders present in such patients.

Aneurysm Hybrid Treatment by Simultaneous Replacement of Ascending Aorta and Aortic Arch and Endoluminal Stenting of the Descending Aorta

2006 ◽  
Vol 9 (1) ◽  
pp. E530-E532
Author(s):  
Friedrich-Christian Riess ◽  
Hans Krankenberg ◽  
Thilo Tübler ◽  
Matthias Danne
Keyword(s):  
Aortic Arch ◽  
Ascending Aorta ◽  
Descending Aorta ◽  
Hybrid Treatment
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