Cholesterol Feeding Research Articles

Effect of Boiled Water Parasite Kapok (<i>Dendrophthoe pentandra</i>) Leaves on Total Cholesterol Levels and Histopathology of Hepar of Hypercholesterolemic Mice

This study aims to determine effect of boiled water parasite kapok (Dendrophthoe pentandra) leaves on the total cholesterol level and histopathology of hepar of hypercholesterolemic mice (mus musculus). This study used 20 ICR male mice divided into 4 treatment groups namely normal mice group, hypercholesterolemic mice group, mice group with boiled water kapok parasite at a dose of 400 mg/kg BW, and 800 mg/kg BW, respectivelly. The animal group was given boiled water kapok parasite after standard feeding and cholesterol feed for 2 weeks. The parameters observed in this study were total cholesterol levels, the amount of fat granules in the liver tissue of mice which were observed in the form of liver-preserved preparations made by paraffin method. The results showed that the administration of parasitic kapok (Dendrophthoe pentandra) at a dose of 400 mg/kg BW and 800 mg/kg BW had an effect on decreasing the total cholesterol level of mice and the histopathology of hepar of showed improvement after the therapy.

Biological study on the impact of commonly used commercial fats and oil and threats of atherosclerosis

Poor health due to suboptimal nutrition influences on many diseases including diabetes mellitus, obesity, cardiovascular diseases (CVD), elevated cholesterol and blood pressure (BP). World health organization estimated that mortality rate and disease burden due to CVD was around 17.3 million. The prevalence rate of coronary artery diseases (CAD) is higher in Pakistan that is 30% of people age above 45 years. The objective of study involves evaluation of commonly used fats and oil to investigate its effect on lipid profile through in vivo studies. Hypercholesterolaemia was induced by feeding high cholesterol diet. Thirty Sprague dawdle rats were taken having five rats in each group. Margarine, butter, vanaspati ghee and olive oil were given with a specific dose 10 g/100 g feed given 6 weeks on hypercholesterolaemic rats. Maximum weight gain was observed in G2, G3, G4 fed; margarine, butter, vanaspati ghee respectively. And maximum reduction in weight was observed in G5 fed on olive oil. Feeding cholesterol diet showed elevated level of lipid profile in G1. Coincident giving various fats and oil along with high cholesterol diet caused a highly significant increase in serum total cholesterol, low density lipoprotein (LDL), triglycerides except G5. Maximum increase of cholesterol was observed in groups fed butter, margarine, vanaspati ghee were recorded as 177.6 mg/dL, 185.5 mg/dL, 180.7 mg/dL. Minimum reduction in cholesterol was recorded in olive oil group as 170.2 mg/dL. Results suggested that the addition of fats showed a negative influence on lipid profile in hypercholesterolaemic rats.

Contribution of aorta glycosaminoglycans and PCSK9 to hyperlipidemia in experimental rabbits: the role of 10-dehdrogingerdione as effective modulator.

10-Dehydrogingerdione (10-DHGD) was previously reported to possess a hypolipidemic, anti-inflammatory and anti-oxidant properties in hyperlipidemic rabbit model. In this study, we investigated a possible new role for 10-DHGD in modulating atherogenic lipid profile by targeting proprotein convertase subtilisin kexin-9 (PCSK-9). Cholesterol (0.2% w/w)-fed rabbits received either atorvastatin (20mg/kg) or 10-DHGD (10mg/kg) for 12weeks along with cholesterol feeding (HCD). Lipid profile, serum PCSK-9 and macrophage migration inhibitory factor (MIF), and aorta level of tumor necrosis factor-alpha (TNF-α) and glycosaminoglycans (GAGs) were measured. HCD-fed rabbits revealed an atherogenic lipid profile along with increased serum level of PCSK-9 (p < 0.001) and increased serum MIF and aortic TNF-α and GAGs (p < 0.001). 10-DHGD administration to HCD-fed rabbits prevented this atheogenicity by modulating the release of PCSK-9, inflammation extent (serum MIF and aortic TNF-α) and GAGs. These results provide new insights on the hypolipidemic potential of 10-DHGD. The effects of 10-DHGD was superior to that of atorvastatin in most studied parameters modulating atherogenicity. 10-DHGD is found to be able to suppress the release of PCSK-9, decrease aortic expression of GAGs in cholesterol-fed rabbits and halt the inflammation extent. These effects may provide new insights on the hypolipidemic potential of 10-DHGD.

ANALYSIS OF APO-B SERUM LEVELS IN BALB/C MICE HYPERCHOLESTEROLEMIC AGAINST TEMULAWAK EXTRACT (Curcuma xanthoriza Roxb)

APO–B Serum levels is the most predictive value for the incidence of atherosclerosis and coronary heart disease. Curcuma xanthorrhiza Roxb contains curcumin, which can be used as an antioxidant, anti–inflammatory and antihypercholesterol. The mechanism of curcumin contained in ginger to reduce cholesterol is due to its function as a cholagoga or bile stimulant. This study aims to determine the effect of temulawak extract on the levels of APO–B Serum in hypercholesterolemia mice. This research were a true experimental study with a post–test only control group design carried out in February 2018. The extraction As much as 25 mice were divided into 5 groups where are group consisted of 5 mice. Positive control group (K+) were treated with high cholesterol feed and water, negative control group (K–) were given standard feed and water, treatment group 1 (P1) were given high cholesterol food and 25mg/kg BW of curcuma extract for 14 days, treatment group 2 (P2) were treated with foods high in cholesterol and 50mg/kg BW of curcuma extract for 14 days and treatment group 3 (P3) treated with high cholesterol and ginger extract 75mg/kg BW for 14 days. Examination of APO–B levels were measured using the spectrophotometric method. Data were analyzed using One–Way Anova. The results showed that the average of APO–B level at (K+) was 209.7 ± 1.02 mg / dL, at (K–) 115.3 ± 1.04 mg / dL, at (P1) 180.4 ± 1.07 mg / dL, at (P2) 147.6 ± 1.12 mg / dL, at (P3) 119.1 ± 1.10 mg / dL. Based on the results of statistical test it was found that there was a significant decrease in APO–B levels with p–value= 0.001 at alpha 0.05 (p &lt;α).

Bioengineered VEGF Therapy Following Angioplasty in Renovascular Disease: More and Better Microvessels

Asymmetric dimethylarginine (ADMA) is a pro‐atherogenic marker of endothelial dysfunction and inhibitor of endothelial nitric oxide synthase (eNOS) that may contribute to progression of renal injury. We designed a novel bioengineered fusion of an elastin‐like polypeptide with vascular endothelial growth factor (ELP‐VEGF). We showed that ELP‐VEGF therapy in renovascular disease (RVD) restores renal hemodynamics by improving microvascular (MV) rarefaction in the stenotic kidney. Our preliminary data suggest that co‐adjuvant ELP‐VEGF therapy with renal angioplasty (PTRAs) enhances renal recovery compared to PTRAs alone. We aimed to elucidate underlying mechanisms of renoprotection and test the hypothesis that co‐adjuvant ELP‐VEGF+PTRAs decreases ADMA and thus, its effects on eNOS inhibition, causing augmented renal bioavailability of NO and improvements of MV endothelial function, renal hemodynamics, and reversal of MV rarefaction.RVD was induced by unilateral renal artery stenosis and high cholesterol feeding in 14 pigs. Six weeks later, single‐kidney blood flow (RBF) and filtration (GFR) were quantified in vivo using multi‐detector CT at baseline and during an endothelium‐dependent challenge (with acetylcholine, Ach). Then pigs were randomized to either PTRAs+placebo or PTRAs followed by intra‐renal ELP‐VEGF therapy (RVD+PTRAs+ELP‐VEGF). Pigs were observed for four additional weeks; in vivo CT studies repeated, then pigs were euthanized, and ex vivo renal MV micro‐CT quantification, plasma ADMA concentration, and stenotic kidney eNOS, VEGF, and Flk‐1 expression were measured.Pre‐treatment renal hemodynamics were equally reduced and PTRAs similarly resolved renal artery stenosis in all pigs with RVD. However, PTRAs+ELP‐VEGF led to significantly greater recovery of RBF and GFR and responses to Ach than PTRAs alone. Improvements in renal function were accompanied by decreased plasma ADMA and enhanced stenotic kidney expression of eNOS, VEGF, and its Flk‐1 receptor, and improved MV density and remodeling (Figure).This study extends our previous findings by identifying a potential mechanism of enhanced renal recovery after combined PTRAs+ELP‐VEGF therapy. Reductions in circulating ADMA may have contributed to the improved renal expression of eNOS in tandem with VEGF therapy, resulting in augmented renal bioavailability of NO and ultimately improving functional and structural renal MV rarefaction. Furthermore, decreased ADMA may suggest a slowing down of the atherosclerotic process in the RVD kidney, which may have also helped contribute to the greater improvements in MV density and overall renal function after PTRAs+ELP‐VEGF therapy.Support or Funding InformationR41DK109737, R01HL095638, P01HL51971, P20GM104357, R01HL121527, EIA18490005, IPA34170267, and T32HL105324This abstract is from the Experimental Biology 2019 Meeting. There is no full text article associated with this abstract published in The FASEB Journal.

Characterization of EDP-305, a Highly Potent and Selective Farnesoid X Receptor Agonist, for the Treatment of Non-alcoholic Steatohepatitis

Non-alcoholic steatohepatitis (NASH), characterized by hepatocyte injury, inflammation, and fibrosis, is the main cause of chronic liver disease in the Western world. There are currently no approved pharmacological therapies for NASH, underscoring the urgent need for effective treatments. The farnesoid X receptor (FXR) has emerged as an attractive target for the treatment of metabolic and chronic liver diseases. EDP-305 is an FXR agonist currently in phase 2 clinical trials for Primary Biliary Cholangitis (PBC) and NASH. Here, we demonstrate that EDP-305 is a selective and potent FXR agonist that regulates multiple pathways relevant to NASH progression. EDP-305 exhibits anti-fibrotic and anti-inflammatory gene signatures in human macrophage and stellate cell lines, as well as favorable effects on lipid metabolism in hepatocytes, including enhanced low density lipoprotein (LDL)-cholesterol uptake and decreased triglyceride accumulation. The therapeutic potential of EDP-305 was further evaluated in two murine models of NASH: a streptozotocin-high fat diet STAMTM model and a dietary induced NASH (DIN) model driven by high fat, cholesterol, and fructose feeding. In both NASH models, EDP-305 significantly decreased hepatocyte ballooning and lowered the non-alcoholic fatty liver disease (NAFLD) activity score. EDP-305 also significantly attenuated hepatic steatosis and dyslipidemia observed in the DIN mouse model. Conclusion: EDP-305 is a potent FXR agonist with a favorable gene expression profile for NASH treatment as evidenced by the hepato-protective and anti-steatotic effects observed in vivo. The preclinical characterization of EDP-305 presented here suggests that it holds promise for the treatment of NASH.

Effect of Ethanol Extract from Purple Eggplant Skin (Solanum melongena L) On Blood Glucose Levels and Pancreatic β Cells Regeneration on White Rats Male Hypercholesterolemia-Diabetic

To observed secondary metabolite compounds in the purpleeggplant skin fruit ethanol extract, the effect and effective dose on blood glucose levels and regeneration of pancreatic s cells of white rats male Hypercholesterolemia-Diabetic. This research is a laboratory experiment with a Phytochemical assay using a specified reagent for the ethanol extract of purple eggplant skin. The effect and effective dose on blood glucose levels and regeneration of pancreatic s cells animal model using posttest randomized controlled-group design. A total of 30 rats were divided into six groups. Group I; normal control given standard feed: group II; negative control is given Na CMC 0.5%, high cholesterol feed and induced by streptozotocin 30 mg/kg BW; experimental groups were given extract of ethanol from purple eggplant skin each with dose 25, 50 and 100 mg/kg BW, high cholesterol feed, and streptozotocin 30 mg/kg BW. The data obtained were analyzed using one-way ANOVA test at 95% confidence level and continued with LSD Post Hoc test and description of histologic damage level of the pancreaswas analyzed by Kruskal-Wallis test followed by Mann-Whitney test for observed the difference between treatments. Extracts ethanol of purple eggplant skinaffect blood glucose levels and pancreatic s cell regeneration and an effective dose is a dose of 25 mg/kg body weight was the most effective extract.This research confirm that the ethanol extract from purple eggplant skin (Solanum melongena L) affect blood glucose levels and pancreatic s cell regeneration.

Evaluation of Reference Genes for Quantitative PCR in Four Tissues from Rabbits with Hypercholesterolaemia

Abstract Rabbit with hypercholesterolaemia is an important model for studying cholesterol metabolism disease. This study aimed to evaluate the expression stability of nine reference genes for quantitative PCR (qPCR) analysis in adrenal gland, liver, spleen, and kidney tissue from rabbits with hypercholesterolaemia. In total, 30 male Harbin Large White (HLW) rabbits were fed a normal feed (n = 15) or a high cholesterol feed (n = 15) for 8 weeks to induce hypercholesterolaemia. Nine reference genes were verified by qPCR using cDNA extracted from rabbit tissue samples. For qPCR analysis, reference genes were evaluated using the RefFinder and GeNorm algorithms. Overall, seven rabbits with hypercholesterolaemia were identified based on body weight and total cholesterol measurements. Combining the results of the RefFinder and GeNorm algorithms, the most stable reference genes were hypoxanthine phosphoribosyltransferase 1 (Hprt1) and eukaryotic translation elongation factor 1 alpha 1 (Eef1a1) in the adrenal gland, β-2-microglobulin (B2m) and glyceraldehyde-3-phosphate dehydrogenase (Gapdh) in the liver, tyrosine 3-monooxygenase/tryptophan 5-monooxygenase activation protein zeta (Ywhaz) and Gapdh in the spleen, and peptidylprolyl isomerase (Ppia), β-actin (Actb), succinate dehydrogenase complex subunit A flavoprotein (Sdha), and B2m in the kidney. Taken together, our results confirmed that Hprt1 and Eef1a1, B2m and Gapdh, Ywhaz and Gapdh, and Ppia, Actb, Sdha, and B2m were the best reference genes for qPCR analyses in adrenal gland, liver, spleen, and kidney tissue, respectively, of rabbits with hypercholesterolaemia.

The iridoid loganic acid and anthocyanins from the cornelian cherry (Cornus mas L.) fruit increase the plasma l-arginine/ADMA ratio and decrease levels of ADMA in rabbits fed a high-cholesterol diet

BackgroundAlthough fruit and vegetable-rich diets have beneficial effects on cardiovascular diseases, we have little knowledge of the impact of fruits and their constituents, iridoids and anthocyanins, on the l-arginine-ADMA-DDAH pathway. Our previous study demonstrated the modulation of those factors by the oral administration of the cornelian cherry fruit. Hypothesis/purposeWe have assessed the effects of the oral administration of two main constituents isolated from the cornelian cherry fruit, iridoid loganic acid and anthocyanins, on l-arginine, its derivatives (ADMA, SDMA), metabolites (DMA, l-citrulline), and the hepatic DDAH activity and its isoform expression in rabbits fed a high-cholesterol diet. We have also analyzed eNOS expression in the thoracic aorta as well as the redox status in blood. Study DesignIn the present study, we used an animal model of diet induced atherosclerosis. For 60 days, white New Zealand rabbits were fed a standard diet, a 1% cholesterol enriched diet, or concomitantly with the investigated substances. l-arginine, ADMA, SDMA, DMA, and l-citrulline were assessed using the LC-MS/MS method. DDAH activity and redox parameters were analyzed spectrophotometrically. DDAH1 and DDAH2 isoform expressions were assessed by western blotting, mRNA expression of eNOS was quantified by real-time PCR. ResultsWe demonstrated that the administration of loganic acid (20 mg/kg b.w.), and to a lesser extent of anthocyanins (10 mg/kg b.w.), caused an increase in the l-arginine level and the l-arginine/ADMA ratio. Also, both substances decreased ADMA, DMA, and l-citrulline, but not SDMA levels. Anthocyanins, but not loganic acid, enhanced the activity of DDAH in the liver. Anthocyanins also significantly enhanced both DDAH1 and DDAH2 expression, while loganic acid to a lesser extent enhanced DDAH1 but not DDAH2 expression. Both loganic acid and anthocyanins pronouncedly increased mRNA expression of eNOS in thoracic aortas. Both loganic acid and anthocyanins reversed the blood glutathione level depleted by dietary cholesterol. Cholesterol feeding decreased the blood GPx level, and the change was not reversed by anthocyanins or loganic acid. We did not observe any significant differences in the blood levels of MDA or SOD among the groups. ConclusionIridoids and anthocyanins may modulate the l-arginine-ADMA pathway in subjects fed a high-cholesterol diet.

Comparative Study of Different Diets-Induced NAFLD Models of Zebrafish.

Dietary composition has important impact on nonalcoholic fatty liver disease (NAFLD). The purpose of this study was to explore the relationship between NAFLD and major dietary components using zebrafish larvae fed different diets. Zebrafish larvae fed with high cholesterol (HC), high fructose (HF) and extra feeding (EF) diets for 10 days displayed varying degrees steatosis. The incidence and degree of steatosis were the most severe in the EF group. A HC diet severely promoted lipid deposits in the caudal vein. The triglyceride and glucose contents of zebrafish significantly increased in the HF and EF groups compared with the control group. Moreover, the mRNA expression of oxidative stress gene gpx1a, endoplasmic reticulum stress genes ddit3 and grp78, inflammatory genes tnfa, glucose metabolism genes irs2, glut1 and glut2, and lipid metabolism genes cidec, chrebp, ppara and cpt1a were significantly increased in the HF group. The HC diet was associated with upregulation of grp78, and downregulation of irs2, glut1 and glut2. The mRNA expression of lipogenesis and glucose metabolism associated genes were decreased in the EF group. In addition, the autophagy associated genes atg3, atg5, atg7, and atg12, and protein expression of ATG3 and LC3BII were reduced and P62 were elevated in the HC group. We also performed comparative transcriptome analysis of the four groups. A total of 2,492 differentially expressed genes were identified, and 24 statistically significant pathways were enriched in the diet treatment groups. This study extends our understanding of the relationships between diet ingredients and host factors that contribute to the pathogenesis of NAFLD, which may provide new ideas for the treatment of NAFLD.

Regression of Atherosclerotic Plaques of Cholesterol-Fed Rabbits by Combined Chemotherapy With Paclitaxel and Methotrexate Carried in Lipid Core Nanoparticles.

In previous studies, it was demonstrated that lipid core nanoparticles (LDE) resemble the low-density lipoprotein structure and carrying the antiproliferative agent paclitaxel (PTX) strongly reduced atherosclerosis lesions induced in rabbits by cholesterol feeding. Currently, the aim was to verify whether combining LDE-PTX treatment with methotrexate (MTX) associated with LDE (LDE-MTX) could accelerate the atherosclerosis regression attained with single LDE-PTX treatment, after withdrawing the cholesterol feeding. Thirty-eight rabbits were fed 1% cholesterol chow for 8 weeks. Six of these rabbits were then euthanized for analyses of the aorta (controls). In the remaining rabbits, cholesterol feeding was withdrawn, and those 32 animals were allocated to 3 groups submitted to different 8-week intravenous treatments, all once/week: LDE-PTX (n = 10; 4 mg/kg), LDE-PTX + LDE-MTX (n = 11; 4 mg/kg), and LDE-alone (n = 11). Rabbits were then euthanized and aortas were excised for morphometric, immunohistochemical, and gene expression analyses. After cholesterol feeding withdrawal, in comparison with LDE-alone group, both LDE-PTX and LDE-PTX + LDE-MTX treatments had the ability to increase the regression of plaque areas: -49% in LDE-PTX and -59% for LDE-PTX + LDE-MTX. However, only LDE-PTX + LDE-MTX treatment elicited reduction in the intima area, estimated in -57%. Macrophage presence in aortic lesions was reduced 48% by LDE-PTX and 43% by LDE-PTX + LDE-MTX treatment. Matrix metalloproteinase 9 was reduced by either LDE-PTX (74%) or LDE-PTX + LDE-MTX (78%). Tumor necrosis factor α gene expression was reduced 65% by LDE-PTX and 79% by LDE-PTX + LDE-MTX. In conclusion, treatment with LDE-PTX indeed accelerated plaque reduction after cholesterol feeding; LDE-PTX + LDE-MTX further increased this effect, without any observed toxicity. These results pave the way for the use of combined chemotherapy to achieve stronger effects on aggravated, highly inflamed atherosclerotic lesions.

Abstract 453: Sestrin1 is Required to Maintain Plasma Cholesterol Homeostasis During Cholesterol Feeding

Elevated plasma cholesterol is an established risk factor in the development of heart disease; however, the detailed mechanisms controlling plasma cholesterol levels are complex and under active investigation. Integrating mouse liver global co-expression networks along with human lipid genome-wide association study (GWAS) data, we identified Sestrin1 as a candidate gene associated with cholesterol in mice and humans. To test the role of Sestrin1 in cholesterol metabolism, we performed in vitro and in vivo studies to determine its sensitivity to cholesterol and influence on cellular and plasma cholesterol levels. In vitro , Sestrin1 mRNA is upregulated following cellular cholesterol depletion with methyl-β-cyclodextrin for 4 hours in AML12 hepatocyte cells. This upregulation is blocked when cholesterol complexes or Low-Density Lipoprotein (LDL)-cholesterol is supplemented back into the media. In vivo , hepatic Sestrin1 mRNA is downregulated when mice after feeding a 0.2% cholesterol diet for 8 weeks. In contrast, treatment of mice with 0.02% Lovastatin for 1 week results in upregulation of hepatic Sestrin1 mRNA. Consistent with transcriptional regulation by cholesterol in vitro and in vivo , siRNA knockdown of Sterol regulatory element-binding protein 2 (Srebp2) represses Sestrin1 transcription and prevents the transcriptional regulation of Sestrin1 by cholesterol. Knockdown of Sestrin1 with siRNA in AML12 cells results in cellular cholesterol accumulation along with altered cholesterol related gene expression, indicating Sestrin1 can regulate cholesterol metabolism in vitro . In vivo , homozygote or heterozygote Sestrin1 knockout mice fed a 0.2% cholesterol diet for 4 weeks show elevated plasma cholesterol levels compared to littermate control mice. Our results establish Sestrin1 as a Srebp2 target gene that is capable of modulating cellular cholesterol levels in vitro and regulating plasma cholesterol homeostasis in vivo .

Loganic acid and anthocyanins from cornelian cherry (Cornus mas L.) fruits modulate diet-induced atherosclerosis and redox status in rabbits.

Cornelian cherry (Cornus mas L.) is a plant growing in southeast Europe, in the past used in folk medicine. There are many previous publications showing the preventive effects of (poly)phenolic compounds, especially anthocyanins, on cardiovascular diseases, but there is a lack of studies comparing the effects of (poly)phenolics and other constituents of fruits. We have attempted to determine if iridoids and anthocyanins from cornelian cherry fruits may affect the formation of atherosclerotic plaques in the aorta as well as lipid peroxidation and oxidative stress in the livers of cholesterol-fed rabbits. Fractions of iridoids and anthocyanins were analyzed using the high-performance liquid chromatography (HPLC) and liquid chromatography-mass spectrometry (LC-MS) methods. Loganic acid (20 mg/kg b.w.) and a mixture of anthocyanins (10 mg/kg b.w.) were administered orally for 60 days to rabbits fed with 1% cholesterol. Histopathological samples of the aortas and the livers were stained with hematoxylin and eosin. Lipid peroxidation (malondialdehyde - MDA) and redox status (glutathione - GSH, glutathione peroxidase - Gpx and superoxide dismutase - SOD) were analyzed using spectrophotometrical methods. Both loganic acid (an iridoid) and a mixture of anthocyanins diminished the formation of atherosclerotic plaques in the aorta. Both substances also diminished lipid peroxidation, measured as a decrease of MDA, and attenuated oxidative stress, measured as an increase of GSH in the livers depleted by cholesterol feeding. Unexpectedly, cholesterol feeding decreased the Gpx activity in the liver, which was reversed by both investigated substances. We have shown that both iridoids and anthocyanins help prevent fed-induced atherosclerosis, and the consumption of fruits rich in these substances may elicit beneficial effects on the cardiovascular system.

Dietary Cholesterol, Serum Lipids, and Heart Disease: Are Eggs Working for or Against You?

The relationship between blood cholesterol and heart disease is well-established, with the lowering of serum low-density lipoprotein (LDL)-cholesterol being the primary target of preventive therapy. Furthermore, epidemiological studies report lower risk for heart disease with higher concentrations of high-density lipoprotein (HDL)-cholesterol. There has also been considerable interest in studying the relationship between dietary cholesterol intake and heart disease risk. Eggs are one of the richest sources of cholesterol in the diet. However, large-scale epidemiological studies have found only tenuous associations between the intake of eggs and cardiovascular disease risk. Well-controlled, clinical studies show the impact of dietary cholesterol challenges via egg intake on serum lipids is highly variable, with the majority of individuals (~2/3 of the population) having only minimal responses, while those with a significant response increase both LDL and HDL-cholesterol, typically with a maintenance of the LDL/HDL cholesterol ratio. Recent drug trials targeting HDL-cholesterol have been unsuccessful in reducing cardiovascular events, and thus it is unclear if raising HDL-cholesterol with chronic egg intake is beneficial. Other important changes with egg intake include potentially favorable effects on lipoprotein particle profiles and enhancing HDL function. Overall, the increased HDL-cholesterol commonly observed with dietary cholesterol feeding in humans appears to also coincide with improvements in other markers of HDL function. However, more investigation into the effects of dietary cholesterol on HDL functionality in humans is warranted. There are other factors found in eggs that may influence risk for heart disease by reducing serum lipids, such as phospholipids, and these may also modify the response to dietary cholesterol found in eggs. In this review, we discuss how eggs and dietary cholesterol affect serum cholesterol concentrations, as well as more advanced lipoprotein measures, such as lipoprotein particle profiles and HDL metabolism.

The Effect of Phytosterol-Rich Fraction from Palm Fatty Acid Distillate on Blood Serum Lipid Profile of Dyslipidemia Rats

ABSTRACTPhytosterol-rich fraction (PRF) obtained from palm fatty acid distillate (PFAD) was investigated for its effect on blood serum lipid profile of dyslipidemia rats. Dyslipidemia was induced by force feeding cholesterol to five groups of rats; one group was a control or normal group. Cholesterol force-fed groups were treated with 0, 10, 20, 30, and 40 mg PRF/kg/day for 4 weeks. All groups of rats were fed standard diet. A normal group was fed standard diet without PRF treatment and cholesterol force feeding. Lipid profile was measured every week (0, 1, 2, 3, and 4). Four-week treatment resulted in significant blood serum lipid profile improvement. PRF improved blood serum lipid profile by decreasing total cholesterol, triglyceride, and low density lipoprotein (LDL) cholesterol level and increasing high density lipoprotein (HDL) cholesterol level. The doses of PRF significantly affected blood serum lipid profile as well as duration of PRF treatment. PRF inhibited cholesterol absorption, which delayed blood serum total cholesterol rise. Cholesterol absorption inhibition was also indicated by higher fecal cholesterol concentration after PRF feeding. These results indicate the beneficial effect of PRF in the treatment of dyslipidemia.

Lipid core nanoparticles resembling low-density lipoprotein and regression of atherosclerotic lesions: effects of particle size.

Particles are usually polydispersed and size is an important feature for lipid-based drug delivery systems in order to optimize cell-particle interactions as to pharmacologic action and toxicity. Lipid nanoparticles (LDE) with composition similar to that of low-density lipoprotein carrying paclitaxel were shown to markedly reduce atherosclerosis lesions induced in rabbits by cholesterol feeding. The aim of this study was to test whether two LDE fractions, one with small (20–60 nm) and the other with large (60–100 nm) particles, had different actions on the atherosclerotic lesions. The two LDE-paclitaxel fractions, prepared by microfluidization, were separated by density gradient ultracentrifugation and injected (4 mg/body weight, intravenously once a week) into two groups of rabbits previously fed cholesterol for 4 weeks. A group of cholesterol-fed animals injected with saline solution was used as control to assess lesion reduction with treatment. After the treatment period, the animals were euthanized for analysis. After treatment, both the small and large nanoparticle preparations of LDE-paclitaxel had equally strong anti-atherosclerosis action. Both reduced lesion extension in the aorta by roughly 50%, decreased the intima width by 75% and the macrophage presence in the intima by 50%. The two preparations also showed similar toxicity profile. In conclusion, within the 20–100 nm range, size is apparently not an important feature regarding the LDE nanoparticle system and perhaps other solid lipid-based systems.

Effect of Powder Leaf Breadfruit Disposals (Arthocarpus Altilis) in Oil Mandar District and Polman Against Cholesterol and Glucose Mice (Mus Musculus)

The purpose of this study was to determine the effect of powdered leaves of breadfruit (Arthocarpus altilis) on oil is mandated origin of the Polman glucose and cholesterol levels in mice (Mus musculus). This study comprised 4 treatments and each treatment consisted of 5 replicates, ie groups of mice were fed a standard (negative control); 2 groups: group of mice fed with standard and cholesterol feed (positive control); Group 3 that mice fed with standard and Selayar oil; and group 4: group of mice fed with standard and Mandar oil that has been given powdered leaves of breadfruit. Measurement of glucose and blood cholesterol levels in mice done 3 times ie 2 weeks after the adaptation period (phase 1), 2 weeks after administration of the oil (phase 2) and 2 weeks after feeding cholesterol (stage 3). Based on the analysis of data both cholesterol and glucose levels showed that in a group of 4 decreased glucose and cholesterol levels in stage 2 but at stage 3 an increase in the group of mice given only the oil while in the group of mice given the oil and powdered leaves of breadfruit indicate glucose levels and normal cholesterol. The conclusion of this study show that the addition of powdered leaves of breadfruit into cooking oil Mandar influential in glucose levels and normalize blood cholesterol levels in mice.

Effects of Chinese Dietary Pattern of Fat Content, n-6/n-3 Polyunsaturated Fatty Acid Ratio, and Cholesterol Content on Lipid Profile in Rats.

This study aims to investigate the effect of Chinese diet pattern of fat content (30% or 36.06%), n-6/n-3 polyunsaturated fatty acid (PUFA) ratio (5 : 1 or 9 : 1), and cholesterol content (0.04 or 0.057 g/kg total diet) on lipid profile using a rat model. Results showed that rats' body weights (BWs) were controlled by the simultaneous intakes of cholesterol level of 0.04 g/kg total diet and n-6/n-3 ratio of 5 : 1. In addition, under high-fat diet, increased cholesterol feeding led to increased total cholesterol (TC) and low density lipoprotein cholesterol (LDL-C) levels and decreased triacylglycerols (TG) in rats' plasma. However, high density lipoprotein cholesterol (HDL-C) level and the ratios of HDL-C/LDL-C and HDL-C/TC in rats' plasma increased in response to simultaneous intakes of low n-6/n-3 ratio (5 : 1) and cholesterol (0.04 g/kg total diet) even under high-fat diet. Moreover, as the n-6/n-3 PUFA ratio in the diet decreased, the proportion of n-3 PUFAs increased in plasma, liver, and muscle and resulted in the decrease of n-6/n-3 PUFA ratio.

ANTI-ATHEROSCLEROTIC ACTIVITY OF ELAEOCARPUS GANITRUS ROXB. IN CHOLESTEROL-FED RABBITS

Objectives: Atherosclerosis was experimentally induced in New Zealand white male rabbits by cholesterol feeding for 120 days for investigating effects of 70% ethanolic Elaeocarpus ganitrus seed extract (EEGS) against atherosclerosis.Methods: Anti-atherosclerotic activity of E. ganitrus extract was evaluated at a dose level of 250 and 500 mg/kg of body weight (p.o). On 121st day, the animals were sacrificed to collect the aorta for determining tissue lipid profile, antioxidant parameters, and histopathological changes. One-way ANOVA followed by Tukey’s multiple comparison test was used for the statistical analysis.Results: Aorta of cholesterol-fed rabbits for 120 days showed marked elevation in total cholesterol, triglycerides, and phospholipids. EEGS extract treatment significantly (p≤0.01, ≤0.001) corrected disturbed lipid profile in cholesterol-fed rabbits in a dose-dependent manner during the 60 days of the treatment period. A significant reduction in lipid peroxidation and a considerable raise in glutathione, catalase, and superoxide dismutase levels (p≤0.01, ≤0.001) were accompanied by post-treatment with EEGS extract to cholesterol-fed rabbits. The histopathological modifications such as accumulation of foam cells, atheromatous plaque formation, and lumen size reduction supported the successful induction of atherosclerosis in rabbits. The treated rabbits showed significant protective effect by lowering the deposition of cholesterol and increasing the lumen size compared to cholesterol-fed group.Conclusions: Phytoconstituents such as alkaloids, tannins, flavonoids, steroids, triterpenoids, and carbohydrates in the ethanolic extract may be attributed to effective anti-atherosclerotic and antioxidant activity of plant extract. Our study exhibited that EEGS extract could be a potent herbal therapeutic agent for the treatment of atherosclerosis and hypercholesterolemia-related diseases.

Antiobesity and antihypercholesterolemic effects of white tea (Camellia sinensis) infusion on high-fat diet induced obese rats

Obesity may cause the lipid metabolisms disorder so that a risk factor for hypercholesterolemic. Catechin and epigallocatechin gallate in white tea potentially inhibit lipase activity. Caffeine compounds and catechin derivatives have a role as antihypercholesterolemic. The objective of this study was to explore antiobesity and antihypercholesterolemic activity from white tea infusions to lipase and total cholesterol in rats model fed a high-fat-diet. Twenty-five rats were divided into five groups. Negative control group was administered with distilled water. The positive control group was administered with orlistat dose 14.2 mg/kgBW. Group 3 rd , 4 th , and 5 th were treated with white tea infussion doses of 125, 250 and 500 mg/kgBW/day, respectivelly. period and feed intake was calculated daily during the treatment. White tea doses of 500 mg/kgBW decrease the total cholesterol by 37.16±11 mg/dL, lipase level of 23.70±0.64 U/L, weight up to 3.53±1.21 g/day and decrease feed intake by 12.71±1.76 g/day. The infusion of white tea can decrease total cholesterol level, lipase level, body weight and feed intake. This study concluded that infusion of white tea has antiobesity and antihypercholesterolemic effect on rats fed high-fat-diet.