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RISS 인기검색어
- 검색키워드
- 저자 : ( Sampath Parthasarathy ) (검색결과 15 건)
- 무료
- 기관 내 무료
- 유료
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Inhibition of Atherosclerosis in Low-Density Lipoprotein Receptor-Negative Mice by Sesame Oil
Sampath Parthasarathy,Shylesh Bhaskaran,Nalini Santanam,Meera Penumetcha 한국식품영양과학회 2006 Journal of medicinal food Vol.9 No.4
Diet has profound effects on the development of atherosclerosis. Fatty acid composition, antioxidants, andother components such as lignans have major effects on the atherosclerotic process. Sesame oil has both mono- and polyun-saturated fatty acid constituents in equal proportions. In addition, it also has high levels of numerous antioxidants and induc-ers of peroxisome proliferator-activated receptor. The objective of this study was to determine the anti-atherosclerotic effectsof sesame oil. In this study, male low-density lipoprotein (LDL) receptor (LDLR) . /. mice were fed atherogenic diet oratherogenic diet reformulated with the same level of sesame oil (sesame oil diet). Plasma lipids and atherosclerotic lesionswere quantified after 3 months of feeding. Sesame oil-containing diet significantly reduced the atherosclerotic lesion forma-tion and plasma cholesterol, triglyceride, and LDL cholesterol levels in LDLR . /. mice. These findings suggest that sesameoil could inhibit atherosclerosis lesion formation effectively, perhaps because of the synergistic actions of fatty acid and non-saponifiable components.
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Novel Antioxidants and Atherosclerosis
Sampath Parthasarathy,Nalini Santanam 한국식품영양과학회 2004 한국식품영양과학회 학술대회발표집 Vol.55 No.-
Coronary heart disease (CHD) has been the number one killer in western society for a long time, and CHD in most instances is due to atherosclerosis. One of the earliest events in atherogenesis is the intracellular accumulation of lipids, particularly cholesterol esters, in the aortic intima. The lipids presumably came from the uptake of plasma lipoproteins, particularly from LDL. These foam cells were identified as being predominantly as macrophages. Currently, it is believed that oxidation of low density lipoprotein (LDL) might contribute to the generation of foam cells. An outcome of the oxidation hypothesis is that the consumption of antioxidants would be beneficial. In this study, Boldine, an alkaloid of Peumus boldus was tested for their antioxidant potency both in, in vitro oxidation system and in mouse models. Boldine decreased the ex-vivo oxidation of Low-density lipoprotein (LDL). In vivo studies were performed to study the effect of these compounds on the atherosclerotic lesion formation in LDL r-/- mice. Three groups of LDL r-/- mice (N=12 each) were fed an atherogenic diet. Group 1 was given vehicle and group 2 and 3 were given 1 and 5 mg of Boldine/day in addition to the atherogenic diet. The results indicated that there was a decrease in lesion formation reaching a 40% reduction due to Boldine compared to controls. The in vivo tolerance of Boldine in humans (has been used as an herbal medicine in other diseases) should make it an attractive alternative to vitamin E.
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Modulation of Leptin Levels by Oxidized Linoleic Acid: A Connection to Atherosclerosis?
Meera Penumetcha,Nadya Merchant,Sampath Parthasarathy 한국식품영양과학회 2011 Journal of medicinal food Vol.14 No.4
The objective of the study was to determine the effects of oxidized linoleic acid (Ox-LA) on plasma leptin and to determine the relationship between plasma leptin levels and atherosclerosis in animals treated with Ox-LA. Low-density lipoprotein (LDL) receptor knockout (LDL r^(−/−)) mice were fed a high fat diet with or without Ox-LA for 11 weeks. Plasma leptin levels in the high fat group consuming Ox-LA were significantly higher (14,052 ± 601 pg/mL vs. 10,950 ± 541 pg/mL; P < .01) compared to the group receiving the high fat diet alone. There was a highly significant correlation between the plasma leptin levels and aortic atherosclerotic lesions. From this we conclude that chronic exposure to dietary Ox-LA increases the plasma levels of leptin in LDL r^(−/−) mice on a high fat diet. Considering our previous finding that dietary Ox-LA increased atherosclerosis, the current findings emphasize the need to reduce dietary intake of oxidized fat.
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Anti-Atherosclerotic and Anti-Inflammatory Actions of Sesame Oil
Chandrakala Aluganti Narasimhulu,Krithika Selvarajan,Dmitry Litvinov,Sampath Parthasarathy 한국식품영양과학회 2015 Journal of medicinal food Vol.18 No.1
Atherosclerosis, a major form of cardiovascular disease, has now been recognized as a chronic inflammatory disease. Nonpharmacological means of treating chronic diseases have gained attention recently. We previously reported that sesame oil has anti-atherosclerotic properties. In this study, we have determined the mechanisms by which sesame oil might modulate atherosclerosis by identifying genes and inflammatory markers. Low-density lipoprotein receptor knockout (LDLR- / - ) female mice were fed with either an atherogenic diet or an atherogenic diet reformulated with sesame oil (sesame oil diet). Plasma lipids and atherosclerotic lesions were quantified after 3 months of feeding. Plasma samples were used for cytokine analysis. RNA was extracted from the liver tissue and used for global gene arrays. The sesame oil diet significantly reduced atherosclerotic lesions, plasma cholesterol, triglyceride, and LDL cholesterol levels in LDLR- / - mice. Plasma inflammatory cytokines, such as MCP-1, RANTES, IL-1α, IL-6, and CXCL-16, were significantly reduced, demonstrating an anti-inflammatory property of sesame oil. Gene array analysis showed that sesame oil induced many genes, including ABCA1, ABCA2, APOE, LCAT, and CYP7A1, which are involved in cholesterol metabolism and reverse cholesterol transport. In conclusion, our studies suggest that a sesame oil-enriched diet could be an effective nonpharmacological treatment for atherosclerosis by controlling inflammation and regulating lipid metabolism.
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Chung, Ill-Min,Abdul Rahuman, Abdul,Marimuthu, Sampath,Kirthi, Arivarasan Vishnu,Anbarasan, Karunanithi,Padmini, Parthasarathy,Rajakumar, Govindasamy D.A. Spandidos 2017 Experimental and therapeutic medicine Vol.14 No.1
<P>The present study outlines the development of a method to synthesize copper nanoparticles (CuNPs) by mixing copper acetate solution with leaf extract of <I>Eclipta prostrata</I> without using any surfactant or external energy. <I>E. prostrata</I> leaf extract function as an excellent reducing agent of copper ions, and the biosynthesized CuNPs are safer for the environment. The powder X-ray diffraction (XRD) pattern provided evidence for the formation of face-centered cubic structure ranging from 23 to 57 nm, with an average size of 31±1.2 nm. Fourier transform infrared spectroscopy (FTIR) was used to identify the biomolecules and capping reagents in the <I>E. prostrata</I> leaf extract that may be responsible for the reduction of copper ions and the stability of the bioreduced nanoparticles. The biosynthesized CuNPs displayed considerable antioxidant capacity. Similarly, <I>in vitro</I> anticancer studies demonstrated the cytotoxicity value of synthesized CuNPs against tested HepG2 cells. The findings of the present study suggested that biosynthesized CuNPs that utilize extracts of <I>E. prostrata</I> may be used for therapeutic application, and thus are a promising nanomaterial.</P>
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Pragney Deme,Chandrakala Aluganti Narasimhulu,Sampath Parthasarathy 한국식품영양과학회 2019 Journal of medicinal food Vol.22 No.8
Plant extracts are gaining more attention as therapeutic agents against inflammation. In this study, four different widely used herbals were selected, such as holy basil leaf, sesame seed, long pepper, and cubeb pepper. We have evaluated the anti-inflammatory action of an aqueous extract from these herbs and tested their effects on monocyte-derived macrophages (MDMs). MDMs were pre-treated with these extracts individually for 2 h, followed by lipopolysaccharide (LPS) stimulation for 24 h and pro-inflammatory gene expression was analyzed. Also, we studied the effect of these extracts on the oxidation of low-density lipoprotein (LDL) by enzymatic (Myeloperoxidase) and non-enzymatic (copper) reactions. All extracts attenuated LPS-induced inflammation and also were able to inhibit the oxidation of LDL. These beneficial actions of extracts led us to identify molecules present in the extracts. A liquid chromatography–high resolution mass spectrometric analysis was performed to identify the chemical composition of extracts. Wide range of molecules were identified across all the extracts, short-chain organic acids, phenolic acids and derivatives, piperine and its structural homologues, eugenol, rosmarinic acid, flavonoids and their glucosides, and others. This study opens a door for future studies on non-pharmacological natural therapeutics that will be useful for consumers and producers, as well as industries utilizing bioactive compounds.
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Krithika Selvarajan,Chandrakala Aluganti Narasimhulu,Reena Bapputty,Sampath Parthasarathy 한국식품영양과학회 2015 Journal of medicinal food Vol.18 No.4
Dietary intervention to prevent inflammation and atherosclerosis has been a major focus in recent years. We previously reported that sesame oil (SO) was effective in inhibiting atherosclerosis in low-density lipoprotein-receptor negative mice. We also noted that the levels of many proinflammatory markers were lower in the SO-treated animals. In this study we tested whether the non-lipid, aqueous components associated with SO would have anti-inflammatory and antioxidant effects. Polymerase chain reaction array data indicated that sesame oil aqueous extract (SOAE) was effective in reducing lipopolysaccharide (LPS)-induced inflammation in RAW 264.7 macrophage cells. Expression of inflammatory cytokines such as interleukin (IL)-1α, IL-6, and tumor necrosis factor α (TNF-α) was also analyzed independently in cells pretreated with SOAE followed by inflammatory assault. Effect of SOAE on TNF-α-induced MCP-1 and VCAM1 expression was also tested in human umbilical vein endothelial cells. We observed that SOAE significantly reduced inflammatory markers in both macrophages and endothelial cells in a concentration-dependent manner. SOAE was also effective in inhibiting LPS-induced TNF-α and IL-6 levels in vivo at different concentrations. We also noted that in the presence of SOAE, transcription and translocation of NF-κB was suppressed. SOAE was also effective in inhibiting oxidation of lipoproteins in vitro. These results suggest the presence of potent anti-inflammatory and antioxidant compounds in SOAE. Furthermore, SOAE differentially regulated expression of scavenger receptors and increased ATP-binding cassette A1 (ABCA1) mRNA expression by activating liver X receptors (LXRs), suggesting additional effects on lipid metabolism. Thus, SOAE appears multipotent and may serve as a valuable nonpharmacological agent in atherosclerosis and other inflammatory diseases.
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Chandrakala Aluganti Narasimhulu,Aladdin Riad,Sampath Parthasarathy 한국식품영양과학회 2018 Journal of medicinal food Vol.21 No.7
Diet and exercise are recommended both as a prophylactic and as a therapeutic approach for patients with established coronary artery disease. We previously reported that sesame oil (SESO) and its aqueous extract (SOAE) showed antiatherosclerotic and anti-inflammatory properties. We also observed that genes involved in reverse cholesterol transport (RCT) might be activated. In this study, we tested whether post-treatment with SESO or SOAE would reduce preexisting atherosclerosis by enhancing RCT. Female low-density lipoprotein receptor knockout (LDL-R−/−) mice were fed an atherogenic diet for 3 months, followed by post-treatment with either control or SESO or SOAE for 1 month. Plasma lipids and atherosclerotic lesions were quantified at the end of the study. RNA was extracted from the aortic tissues and used for real-time polymerase chain reaction analysis. SESO and SOAE post-treatment significantly reduced atherosclerotic lesions in LDL-R−/− mice compared to controls. No significant change in plasma cholesterol, triglyceride, or LDL cholesterol levels was observed. Aortic gene analysis showed that the SESO/SOAE post-treatment reduced inflammatory gene expression and induced genes involved in cholesterol metabolism and RCT. This is the first study that demonstrates that post-treatment with SESO and SOAE could be an effective treatment for preexisting atherosclerosis and inflammation. The study also may suggest that reducing inflammation might be conducive to an accelerated regression of lesions.
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