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Shen M, Yuan L, Zhang J, Wang X, Zhang M, Li H, Jing Y, Zeng F, Xie J. Phytosterols: Physiological Functions and Potential Application. Foods 2024; 13:1754. [PMID: 38890982 PMCID: PMC11171835 DOI: 10.3390/foods13111754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2024] [Revised: 05/13/2024] [Accepted: 05/28/2024] [Indexed: 06/20/2024] Open
Abstract
Dietary intake of natural substances to regulate physiological functions is currently regarded as a potential way of promoting health. As one of the recommended dietary ingredients, phytosterols that are natural bioactive compounds distributed in plants have received increasing attention for their health effects. Phytosterols have attracted great attention from scientists because of many physiological functions, for example, cholesterol-lowering, anticancer, anti-inflammatory, and immunomodulatory effects. In addition, the physiological functions of phytosterols, the purification, structure analysis, synthesis, and food application of phytosterols have been widely studied. Nowadays, many bioactivities of phytosterols have been assessed in vivo and in vitro. However, the mechanisms of their pharmacological activities are not yet fully understood, and in-depth investigation of the relationship between structure and function is crucial. Therefore, a contemporaneous overview of the extraction, beneficial properties, and the mechanisms, as well as the current states of phytosterol application, in the food field of phytosterols is provided in this review.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Jianhua Xie
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang 330047, China; (M.S.); (L.Y.); (J.Z.); (X.W.); (M.Z.); (H.L.); (Y.J.); (F.Z.)
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Rezig L, Abdelkrim YZ. Phytosterols: Potential Therapeutic Effects and Challenges in Food Industry. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2024; 1440:453-462. [PMID: 38036893 DOI: 10.1007/978-3-031-43883-7_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/02/2023]
Abstract
Increases in serum total and low-density lipoprotein (LDL) cholesterol are known as hypercholesterolemia, and it is a significant risk factor for the emergence of cardiovascular illnesses. Any action strategy for lowering serum cholesterol is supported by lifestyle changes. Phytosterols are organic substances from the triterpene family. Phytosterols can lower serum LDL cholesterol levels because of their structural resemblance to cholesterol. Phytosterols are used to enrich or fortify a broad spectrum of food products. Phytosterols are quickly oxidized, just like cholesterol and unsaturated fatty acids. The utilization of free phytosterols for the manufacture of functional meals is highlighted in this chapter, which also focuses on the therapeutic effects of phytosterols and their technological concerns in the industrial field.
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Affiliation(s)
- Leila Rezig
- University of Carthage, National Institute of Applied Sciences and Technology, LR11ES24, LIP-MB 'Laboratory of Protein Engineering and Bioactive Molecules', Tunis, Tunisia
- High Institute of Food Industries, University of Carthage, Tunis, Tunisia
| | - Yosser Zina Abdelkrim
- Laboratory of Molecular Epidemiology and Experimental Pathology (LR11IPT04/LR16IPT04)/Laboratory of Epidemiology and Ecology of Parasites, Institut Pasteur de Tunis - University Tunis El Manar, Tunis, Tunisia
- Process Engineering Department, Institut Supérieur des Études Technologiques de Bizerte, Direction Générale des Études Technologiques, Tunis, Tunisia
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Cheung B, Sikand G, Dineen EH, Malik S, Barseghian El-Farra A. Lipid-Lowering Nutraceuticals for an Integrative Approach to Dyslipidemia. J Clin Med 2023; 12:jcm12103414. [PMID: 37240523 DOI: 10.3390/jcm12103414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 02/07/2023] [Accepted: 02/10/2023] [Indexed: 05/28/2023] Open
Abstract
Dyslipidemia is a treatable risk factor for atherosclerotic cardiovascular disease that can be addressed through lifestyle changes and/or lipid-lowering therapies. Adherence to statins can be a clinical challenge in some patients due to statin-associated muscle symptoms and other side effects. There is a growing interest in integrative cardiology and nutraceuticals in the management of dyslipidemia, as some patients desire or are actively seeking a more natural approach. These agents have been used in patients with and without established atherosclerotic cardiovascular disease. We provide an updated review of the evidence on many new and emerging nutraceuticals. We describe the mechanism of action, lipid-lowering effects, and side effects of many nutraceuticals, including red yeast rice, bergamot and others.
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Affiliation(s)
- Brian Cheung
- Susan Samueli Integrative Health Institute, 856 Health Sciences Road, Irvine, CA 92617, USA
- Division of Cardiology, University of California, Irvine, CA 92521, USA
| | - Geeta Sikand
- Division of Cardiology, University of California, Irvine, CA 92521, USA
| | - Elizabeth H Dineen
- Susan Samueli Integrative Health Institute, 856 Health Sciences Road, Irvine, CA 92617, USA
- Division of Cardiology, University of California, Irvine, CA 92521, USA
| | - Shaista Malik
- Susan Samueli Integrative Health Institute, 856 Health Sciences Road, Irvine, CA 92617, USA
- Division of Cardiology, University of California, Irvine, CA 92521, USA
| | - Ailin Barseghian El-Farra
- Susan Samueli Integrative Health Institute, 856 Health Sciences Road, Irvine, CA 92617, USA
- Division of Cardiology, University of California, Irvine, CA 92521, USA
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Hoang TMH, Luu TT, Ngo THT, Nguyen TMH, Tran HG, Nguyen TTO, Chau VM, Hong DD. Hypolipidaemic Effects of (24R)-4α-methyl-5α-stigmasta-7,22-dien-3β-ol Derived from Aurantiochytrium mangrovei BT3 in the HEPG2 Cell Line. APPL BIOCHEM MICRO+ 2022. [DOI: 10.1134/s0003683822030048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Li J, Bollati C, Bartolomei M, Mazzolari A, Arnoldi A, Vistoli G, Lammi C. Hempseed ( Cannabis sativa) Peptide H3 (IGFLIIWV) Exerts Cholesterol-Lowering Effects in Human Hepatic Cell Line. Nutrients 2022; 14:1804. [PMID: 35565772 PMCID: PMC9101684 DOI: 10.3390/nu14091804] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 04/22/2022] [Accepted: 04/24/2022] [Indexed: 02/04/2023] Open
Abstract
Hempseed (Cannabis sativa) protein is an important source of bioactive peptides. H3 (IGFLIIWV), a transepithelial transported intestinal peptide obtained from the hydrolysis of hempseed protein with pepsin, carries out antioxidant and anti-inflammatory activities in HepG2 cells. In this study, the main aim was to assess its hypocholesterolemic effects at a cellular level and the mechanisms behind this health-promoting activity. The results showed that peptide H3 inhibited the 3-hydroxy-3-methylglutaryl co-enzyme A reductase (HMGCoAR) activity in vitro in a dose-dependent manner with an IC50 value of 59 μM. Furthermore, the activation of the sterol regulatory element binding proteins (SREBP)-2 transcription factor, followed by the increase of low-density lipoprotein (LDL) receptor (LDLR) protein levels, was observed in human hepatic HepG2 cells treated with peptide H3 at 25 µM. Meanwhile, peptide H3 regulated the intracellular HMGCoAR activity through the increase of its phosphorylation by the activation of AMP-activated protein kinase (AMPK)-pathways. Consequently, the augmentation of the LDLR localized on the cellular membranes led to the improved ability of HepG2 cells to uptake extracellular LDL with a positive effect on cholesterol levels. Unlike the complete hempseed hydrolysate (HP), peptide H3 can reduce the proprotein convertase subtilisin/kexin 9 (PCSK9) protein levels and its secretion in the extracellular environment via the decrease of hepatic nuclear factor 1-α (HNF1-α). Considering all these evidences, H3 may represent a new bioactive peptide to be used for the development of dietary supplements and/or peptidomimetics for cardiovascular disease (CVD) prevention.
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Affiliation(s)
| | | | | | | | | | | | - Carmen Lammi
- Department of Pharmaceutical Sciences, University of Milan, Via Mangiagalli 25, 20133 Milan, Italy; (J.L.); (C.B.); (M.B.); (A.M.); (A.A.); (G.V.)
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Assessment of the Cholesterol-Lowering Effect of MOMAST®: Biochemical and Cellular Studies. Nutrients 2022; 14:nu14030493. [PMID: 35276852 PMCID: PMC8838113 DOI: 10.3390/nu14030493] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 01/17/2022] [Accepted: 01/22/2022] [Indexed: 02/01/2023] Open
Abstract
MOMAST® is a patented phenolic complex derived from the olive oil vegetation water, a by-product of the olive oil supply chain, in which hydroxytyrosol (OH-Tyr) and tyrosol (Tyr) and verbascoside are the main compounds. This study was aimed at investigating its hypocholesterolemic effect by assessing the ability to modulate the low-density lipoprotein (LDL) receptor (LDLR)/sterol regulatory element-binding protein 2 (SREBP-2), and proprotein convertase subtilisin/kexin type 9 (PCSK9) pathways. MOMAST® inhibits the in vitro activity of 3-hydroxy-3-methylglutaryl coenzyme A reductase (HMGCOAR) with a dose-response trend. After the treatment of HepG2 cells, MOMAST® increases the SREBP-2, LDLR, and HMGCoAR protein levels leading, from a functional point of view to an improved ability of hepatic cells to up-take LDL from the extracellular environment with a final cholesterol-lowering effect. Furthermore, MOMAST® decreased the PCSK9 protein levels and its secretion in the extracellular environment, presumably via the reduction of the hepatic nuclear factor 1-α (HNF1-α). The experiments were performed in parallel, using pravastatin as a reference compound. Results demonstrated that MOMAST® may be exploited as a new ingredient for the development of functional foods and/or nutraceuticals for cardiovascular disease prevention.
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Yang JW, Ji HF. Phytosterols as bioactive food components against nonalcoholic fatty liver disease. Crit Rev Food Sci Nutr 2021:1-12. [PMID: 34871105 DOI: 10.1080/10408398.2021.2006137] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Phytosterols are bioactive food components widely present in cell membranes of plants, especially in nuts and oilseeds. In recent years, many studies have shown that phytosterols possess therapeutic potentials for nonalcoholic fatty liver disease (NAFLD). This review summarizes the effects of phytosterols from in vitro and in vivo studies to lower the levels of total cholesterol (TC) and triglycerides (TG), and the evidence supporting the potential of phytosterols against NAFLD. The potential mechanisms by which phytosterols improve NAFLD may include (i) competition with cholesterol; (ii) regulation of key factors involved in cholesterol and TG metabolism; and (iii) inhibition of liver inflammation and (iv) regulation of liver fatty acid composition. In summary, phytosterols are potential natural ingredients with good safety profile against NAFLD, which deserve more future studies.
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Affiliation(s)
- Jing-Wen Yang
- Institute of Biomedical Research, Shandong University of Technology, Zibo, Shandong, People's Republic of China.,Shandong Provincial Research Center for Bioinformatic Engineering and Technique, Zibo Key Laboratory of New Drug Development of Neurodegenerative diseases, School of Life Sciences, Shandong University of Technology, Zibo, Shandong, People's Republic of China
| | - Hong-Fang Ji
- Institute of Biomedical Research, Shandong University of Technology, Zibo, Shandong, People's Republic of China.,Shandong Provincial Research Center for Bioinformatic Engineering and Technique, Zibo Key Laboratory of New Drug Development of Neurodegenerative diseases, School of Life Sciences, Shandong University of Technology, Zibo, Shandong, People's Republic of China
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Shen W, Wang Y, Shao W, Wang Q, Jiang Z, Hu H. Dietary plant sterols prevented cholesterol gallstone formation in mice. Food Funct 2021; 12:11829-11837. [PMID: 34787152 DOI: 10.1039/d1fo02695j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Cholesterol gallstone disease is a common global condition. This study investigated the role of plant sterols (PS) in the prevention of gallstone formation and the underlying mechanisms. Adult male mice were fed a lithogenic diet (LD) alone or supplemented with PS (LD-ps), phospholipids (LD-pl) or both PS and phospholipids (LD-ps/pl) for 8 weeks. Incidences of gallstone formation were compared among the groups. Lipids in the bile, liver and serum were analyzed. The expression of genes involved in cholesterol absorption, transport and metabolism in the liver and small intestine was determined. The incidences of gallstone formation were 100% (10/10), 20% (2/10), 100% (10/10) and 40% (4/10) in the LD, LD-ps, LD-pl and LD-ps/pl groups, respectively. Serum cholesterol and intestinal cholesterol absorption were decreased in PS-supplemented mice. The expression of genes related to cholesterol transport and metabolism in the liver was down-regulated by dietary PS. PS supplementation decreased Niemann-Pick C1-like 1 expression in the small intestine and reduced intestinal cholesterol absorption. Our results demonstrated that PS could inhibit intestinal cholesterol absorption and thus prevent cholesterol gallstone formation.
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Affiliation(s)
- Weiyi Shen
- Center of Gallstone Disease, Shanghai East Hospital, Institute of Gallstone Disease, Tongji University School of Medicine, Shanghai, 201200, China. .,Department of Internal Medicine of Traditional Chinese Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 201200, China
| | - Yixing Wang
- Department of Internal Medicine of Traditional Chinese Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 201200, China
| | - Wentao Shao
- Center of Gallstone Disease, Shanghai East Hospital, Institute of Gallstone Disease, Tongji University School of Medicine, Shanghai, 201200, China.
| | - Qihan Wang
- Center of Gallstone Disease, Shanghai East Hospital, Institute of Gallstone Disease, Tongji University School of Medicine, Shanghai, 201200, China.
| | - Zhaoyan Jiang
- Center of Gallstone Disease, Shanghai East Hospital, Institute of Gallstone Disease, Tongji University School of Medicine, Shanghai, 201200, China.
| | - Hai Hu
- Center of Gallstone Disease, Shanghai East Hospital, Institute of Gallstone Disease, Tongji University School of Medicine, Shanghai, 201200, China.
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Huang P, Hao M, Gao Q, Ruan J, Yang S, Liu M, Chen Q, Zhang Y, Wang T. Constituents of Morus alba var. multicaulis leaf improve lipid metabolism by activating the AMPK signaling pathway in HepG2 cells. J Nat Med 2021; 76:200-209. [PMID: 34743295 DOI: 10.1007/s11418-021-01581-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Accepted: 10/24/2021] [Indexed: 02/02/2023]
Abstract
One new compound, 3Z-1-O-β-D-glucopyranosyl-3-hexene-1,5-diol (1), together with 26 known isolates (2-27) were obtained from the leaf of Morus alba var. multicaulis. Among the known compounds, 7, 11, 12, 14, 15, 18, 19, 23, and 24 were firstly obtained from the Morus genus; 2-5, 8, 10, 13, and 20 were firstly isolated from M. alba. var. multlcaulis. Meanwhile, the NMR data of 20 and 23 have been reported here for the first time. Moreover, compounds 1-11, 13, 21, and 23-27 showed inhibitory effects on triglyceride (TG) accumulation in HepG2 cells. In mechanism, compound 1 could activate the phosphorylation of AMP-activated protein kinase α (AMPKα) to accelerate the β-oxidation of fatty acids via promoting the phosphorylation of acetyl-CoA carboxylase 1 and up-regulating carnitine palmitoyl-transferase 1A. Besides, compound 1 exerted lipolysis effect by activating hormone-sensitive lipase. In brief, compound 1 might play a role by up-regulating phosphorylation of AMPKα, enhancing the fatty acid β-oxidation and lipolysis. 27 compounds were obtained from the leaf of Morus alba var. multicaulis. Among them, 18 showed inhibitory effects on TG accumulation in HepG2 cells. Moreover, the new compound, 3Z-1-O-β-D-glucopyranosyl-3-hexene-1,5-diol (1), was found to play a role by up-regulating phosphorylation of AMPKα, enhancing the fatty acids β-oxidation and lipolysis.
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Affiliation(s)
- Peijian Huang
- Tianjin Key Laboratory of TCM Chemistry and Analysis, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, West Area, Tuanbo New Town, Jinghai District, Tianjin, 301617, China
| | - Mimi Hao
- Tianjin Key Laboratory of TCM Chemistry and Analysis, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, West Area, Tuanbo New Town, Jinghai District, Tianjin, 301617, China
| | - Qian Gao
- Tianjin Key Laboratory of TCM Chemistry and Analysis, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, West Area, Tuanbo New Town, Jinghai District, Tianjin, 301617, China
| | - Jingya Ruan
- Tianjin Key Laboratory of TCM Chemistry and Analysis, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, West Area, Tuanbo New Town, Jinghai District, Tianjin, 301617, China
| | - Shengcai Yang
- Institute of TCM, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, West Area, Tuanbo New Town, Jinghai District, Tianjin, 301617, China
| | - Mengyang Liu
- Institute of TCM, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, West Area, Tuanbo New Town, Jinghai District, Tianjin, 301617, China
| | - Qian Chen
- Institute of TCM, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, West Area, Tuanbo New Town, Jinghai District, Tianjin, 301617, China
| | - Yi Zhang
- Tianjin Key Laboratory of TCM Chemistry and Analysis, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, West Area, Tuanbo New Town, Jinghai District, Tianjin, 301617, China. .,Institute of TCM, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, West Area, Tuanbo New Town, Jinghai District, Tianjin, 301617, China.
| | - Tao Wang
- Tianjin Key Laboratory of TCM Chemistry and Analysis, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, West Area, Tuanbo New Town, Jinghai District, Tianjin, 301617, China. .,Institute of TCM, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, West Area, Tuanbo New Town, Jinghai District, Tianjin, 301617, China.
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Abstract
Purpose of Review Coronary heart disease is the leading cause of mortality worldwide. Elevated blood cholesterol levels are not only the major but also the best modifiable cardiovascular risk factor. Lifestyle modifications which include a healthy diet are the cornerstone of lipid-lowering therapy. So-called functional foods supplemented with plant sterols lower blood cholesterol levels by about 10–15%. Recent Findings In the recent revision of the ESC/EAS dyslipidemia guideline 2019, plant sterols are recommended for the first time as an adjunct to lifestyle modification to lower blood cholesterol levels. However, the German Cardiac Society (DGK) is more critical of food supplementation with plant sterols and calls for randomized controlled trials investigating hard cardiovascular outcomes. An increasing body of evidence suggests that plant sterols per se are atherogenic. Summary This review discusses this controversy based on findings from in vitro and in vivo studies, clinical trials, and genetic evidence.
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Affiliation(s)
- Umidakhon Makhmudova
- Klinik Für Innere Medizin I, Universitätsklinikum Jena, Am Klinikum 1, 07747 Jena, Germany
| | - P. Christian Schulze
- Klinik Für Innere Medizin I, Universitätsklinikum Jena, Am Klinikum 1, 07747 Jena, Germany
| | - Dieter Lütjohann
- Institut für klinische Chemie und klinische Pharmakologie, Universitätsklinikum Bonn, Bonn, Germany
| | - Oliver Weingärtner
- Klinik Für Innere Medizin I, Universitätsklinikum Jena, Am Klinikum 1, 07747 Jena, Germany
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Tripathi R, Agarwal S, Rizvi SI, Mishra N*. The Antioxidant Efficacy of Wheatgrass (Triticum Aestivum) on Mercuric Chloride (HgCl2) - Induced Oxidative Stress in Rat Model. CURRENT RESEARCH IN NUTRITION AND FOOD SCIENCE JOURNAL 2021. [DOI: 10.12944/crnfsj.9.2.09] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Mercury is a harmful toxic pollutant, which has hepato-nephrotoxic, hematotoxic, genotoxic and neurotoxic, effects. The aim of the study was to evaluate the protective efficacy of wheatgrass on mercuric chloride (HgCl2) induced oxidative stress and associated complications in rat model. Albino rats were divided into four groups (three rats per group). Group I normal control group. Group II oxidative stressed group received mercuric chloride (0.5 mg/kg/day). Group III only received wheatgrass extract (100 mg/kg/day), whereas Group IV received wheatgrass (100 mg/kg/day) after one hour, followed by mercuric chloride (0.5 mg/kg/day) for 30 days. The results of the study showed that wheatgrass supplementation significantly decreased the HgCl2 induced elevated oxidative stress parameters Plasma Malondialdehyde (MDA) content, Plasma membrane redox system (PMRS), Advanced oxidation protein products (AOPP), simultaneously elevated lipid profile (Total Cholesterol, Triglycerides, Low-density lipoprotein (LDL), liver enzymes as, Plasma Alkaline phosphatase (ALP), Aspartate aminotransferase (AST), and Alanine aminotransferase (ALT), Serum Urea, and Creatinine levels in rats. In addition, wheatgrass treatment improved the antioxidant status in terms of intracellular Reduced Glutathione (GSH), Ferric reducing antioxidant power (FRAP) and 2, 2- diphenyl -1- picrylhydrazyl (DPPH). Therefore it can be concluded that wheatgrass has great potential to diminish the stress-mediated complications and improve the antioxidant status.
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Affiliation(s)
- Renu Tripathi
- 1Department of Home Science, Government Kamla Devi Rathi Girls P.G College, Rajnandgaon, Chhattisgarh, India
| | - Swati Agarwal
- 2Department of Home Science, University of Allahabad, Prayagraj, Uttar Pradesh, India
| | - Syed Ibrahim Rizvi
- 3Department of Biochemistry, University of Allahabad, Prayagraj, Uttar Pradesh, India
| | - Neetu * Mishra
- 4Department of Home Science, University of Allahabad, Prayagraj, Uttar Pradesh, India
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Shrestha SC, Ghebremeskel K, White K, Minelli C, Tewfik I, Thapa P, Tewfik S. Formulation and Characterization of Phytostanol Ester Solid Lipid Nanoparticles for the Management of Hypercholesterolemia: An ex vivo Study. Int J Nanomedicine 2021; 16:1977-1992. [PMID: 33727810 PMCID: PMC7955784 DOI: 10.2147/ijn.s276301] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Accepted: 12/04/2020] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Phytostanols are naturally occurring compounds that reduce blood cholesterol levels significantly. However, their aqueous insolubility poses formulation challenges. AIM To formulate and characterize solid lipid nanoparticle carriers for phytostanol esters to enhance the bioavailability of phytostanols. METHODS Phytostanol ester solid lipid nanoparticles were formulated by the microemulsion method. They were characterized for particle size distribution, polydispersity index, shape, surface charge, entrapment efficiency, stability, chemical structure, and thermal properties. The uptake of the formulation by cell lines, HepG2 and HT-29, and its effect on cell viability were evaluated. RESULTS The formulation of solid lipid nanoparticles was successfully optimised by varying the type of lipids and their concentration relative to that of surfactants in the present study. The optimised formulation had an average diameter of (171 ± 9) nm, a negative surface charge of (-23.0 ± 0.8) mV and was generally spherical in shape. We report high levels of drug entrapment at (89 ± 5)% in amorphous form, drug loading of (9.1 ± 0.5)%, nanoparticle yield of (67 ± 4)% and drug excipient compatibility. The biological safety and uptake of the formulations were demonstrated on hepatic and intestinal cell lines. CONCLUSION Phytostanol ester solid lipid nanoparticles were successfully formulated and characterized. The formulation has the potential to provide an innovative drug delivery system for phytostanols which reduce cholesterol and have a potentially ideal safety profile. This can contribute to better management of one of the main risk factors of cardiovascular diseases.
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Affiliation(s)
- Sony Chandi Shrestha
- School of Human Sciences, London Metropolitan University, London, UK
- Surface Technology, National Physical Laboratory, London, UK
| | | | - Kenneth White
- School of Human Sciences, London Metropolitan University, London, UK
| | | | - Ihab Tewfik
- Life Sciences, University of Westminster, London, UK
| | - Panna Thapa
- Department of Pharmacy, Kathmandu University, Dhulikhel, Nepal
| | - Sundus Tewfik
- Department of Applied Nanomolecules, Bloomsnano Limited, London, UK
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Lin LY, Huang BC, Chen KC, Peng RY. Integrated anti-hyperlipidemic bioactivity of whole Citrus grandis [L.] osbeck fruits-multi-action mechanism evidenced using animal and cell models. Food Funct 2020; 11:2978-2996. [PMID: 32236178 DOI: 10.1039/c9fo02290b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Changes in human life style have increased the incidence of obesity which has become a risk factor to human health. In Taiwan, the annual production of Citrus grandis [L.] reaches 75 000 tons, while the amount of waste fruits could reach 5%. We propose that abundant phytochemicals present in the wastes can be beneficial to attenuate obesity with hyperlipidemia. An animal Wistar rat model showed that pomelo flesh, peels, carpel (the segmental membrane), as well as the essential oil attenuated obesity as well as hyperlipidemia, and the AMPK-SREBP-PPARS pathway was involved. To further verify the mechanism, a HepG2 cell model was used to test some representative pomelo phytonutrients including limonene (Ln), γ-terpinene (γT), p-synephrine (SP), β-sitosterol (βS), and hesperidin (Hn). Data interestingly revealed it to be a multiple mechanism of anti-lipogenic bioactivity via downregulating the enzymes involved in both the cholesterol and triacylglyceride de novo biosynthesis (in the order of decreasing bioactivity): acetyl CoA carboxylase (Hn, SP, βS, Ln = γT), fatty acid synthase (Ln, γT, SP, βS, Hn), HMG-CoA synthase (Ln, Hn, SP, βS, γT), and HMG-CoA reductase (Hn, Ln, βS, γT, SP), and via upregulation of cholesterol-7α-monooxygenase (CYP7A1) (Hn, βS). In addition, all pomelo fruit parts enhanced the fecal crude lipid and sterol excretion capability. Thus, fruits of C. grandis can serve as a rather promising integrative antihyperlipidemic agent.
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Affiliation(s)
- Li-Yun Lin
- Department of Food and Applied Technology, Hungkuang University, No. 1018, Sec. 6, Taiwan Boulevard, Shalu District, Taichung City 43302, Taiwan
| | - Boa-Chan Huang
- Department of Food and Applied Technology, Hungkuang University, No. 1018, Sec. 6, Taiwan Boulevard, Shalu District, Taichung City 43302, Taiwan
| | - Kuan-Chou Chen
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, No. 250, Wu-Xin St., Taipei 116, Taiwan. and Department of Urology, Taipei Medical University Shuan-Ho Hospital, 250, Wu-Xin St., Xin-Yi District, Taipei 116, Taiwan
| | - Robert Y Peng
- Research Institute of Biotechnology, School of Medicine and Nursing, Hungkuang University, 1018, Sec. 6, Taiwan Boulevard, Shalu District, Taichung City 43302, Taiwan. and Research Institute of Medical Sciences, Taipei Medical University, 250, Wu-Xin St., Xin-Yi District, Taipei 116, Taiwan
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Iftikhar M, Iftikhar A, Zhang H, Gong L, Wang J. Transport, metabolism and remedial potential of functional food extracts (FFEs) in Caco-2 cells monolayer: A review. Food Res Int 2020; 136:109240. [PMID: 32846508 DOI: 10.1016/j.foodres.2020.109240] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 03/28/2020] [Accepted: 04/11/2020] [Indexed: 02/07/2023]
Abstract
Caco-2, a human intestinal carcinoma cell line, has been used to test the absorption and transport mechanism of functional foods and drugs across the intestinal epithelium in order to study their antioxidant, anticancer and anti-inflammatory activities. Caco-2 cells represent the morphological and functional characteristics of small intestinal cells and capable of expressing brush borders, tight junctions, intestinal efflux and uptake transporters which regulate permeation of drugs and functional food extracts from intestinal lumen to systemic circulation. The integrity of the Caco-2 monolayer is controlled by establishing the TEER between 200 and 1000 O per cm2. FFEs affect intestinal permeability by adjusting the tight junction proteins between the cells in order to maintain the epithelial barrier function. Because of the side effects of medicines, there is an increased interest in functional food extracts (FFEs) as drug substitutes. Functional foods undergo intricate transport processes and biotransformation after oral administration. Metabolism and transport studies of FFEs in Caco-2 cells are very important for determining their bioavailability. Functional foods and their constituents produce anti-proliferative and anti-cancer effects through apoptosis, cell cycle arrest and inhibition of various signal transduction pathways across Caco-2 cell lines. The current review has summarized the anti-inflammation, anticancer, antioxidant and cholesterol lowering potential of FFEs using Caco-2 cells through reducing local inflammatory signals, production of ROS and lipid accumulation. The transport, bioavailability, metabolism, mechanisms of actions, cellular pathways adopted by FFEs across Caco-2 cell lines are predominantly affected by their molecular weight, structures and physicochemical properties. These studies are beneficial for investigating the different mechanisms of action of FFEs in the human body.
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Affiliation(s)
- Maryam Iftikhar
- Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, China-Canada Joint Lab of Food Nutrition and Health, Beijing Technology & Business University, Beijing 100048, China
| | - Asra Iftikhar
- Department of Pharmacy, Faculty of Pharmaceutical Sciences, The University of Faisalabad (TUF), Faisalabad 38000, Pakistan
| | - Huijuan Zhang
- Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, China-Canada Joint Lab of Food Nutrition and Health, Beijing Technology & Business University, Beijing 100048, China.
| | - Lingxiao Gong
- Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, China-Canada Joint Lab of Food Nutrition and Health, Beijing Technology & Business University, Beijing 100048, China
| | - Jing Wang
- Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, China-Canada Joint Lab of Food Nutrition and Health, Beijing Technology & Business University, Beijing 100048, China.
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15
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Cedó L, Farràs M, Lee-Rueckert M, Escolà-Gil JC. Molecular Insights into the Mechanisms Underlying the Cholesterol- Lowering Effects of Phytosterols. Curr Med Chem 2019; 26:6704-6723. [DOI: 10.2174/0929867326666190822154701] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 01/18/2019] [Accepted: 02/22/2019] [Indexed: 12/11/2022]
Abstract
Dietary phytosterols, which comprise plant sterols and stanols, reduce plasma Low-Density Lipoprotein-Cholesterol (LDL-C) levels when given 2 g/day. Since this dose has not been reported to cause health-related side effects in long-term human studies, food products containing these plant compounds are used as potential therapeutic dietary options to reduce LDL-C and cardiovascular disease risk. Several mechanisms have been proposed to explain the cholesterol-lowering action of phytosterols. They may compete with dietary and biliary cholesterol for micellar solubilization in the intestinal lumen, impairing intestinal cholesterol absorption. Recent evidence indicates that phytosterols may also regulate other pathways. Impaired intestinal cholesterol absorption is usually associated with reduced cholesterol transport to the liver, which may reduce the incorporation of cholesterol into Very-Low- Density Lipoprotein (VLDL) particles, thereby lowering the rate of VLDL assembly and secretion. Impaired liver VLDL production may reduce the rate of LDL production. On the other hand, significant evidence supports a role for plant sterols in the Transintestinal Cholesterol Excretion (TICE) pathway, although the exact mechanisms by which they promote the flow of cholesterol from the blood to enterocytes and the intestinal lumen remains unknown. Dietary phytosterols may also alter the conversion of bile acids into secondary bile acids, and may lower the bile acid hydrophobic/hydrophilic ratio, thereby reducing intestinal cholesterol absorption. This article reviews the progress to date in research on the molecular mechanisms underlying the cholesterol-lowering effects of phytosterols.
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Affiliation(s)
- Lídia Cedó
- Institut d'Investigacions Biomediques (IIB) Sant Pau, Barcelona, Spain
| | - Marta Farràs
- Integrative Systems Medicine and Digestive Disease Division, Department of Surgery and Cancer, Imperial College London, London, United Kingdom
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16
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Abstract
Olive-pomace oil is rich in oleic acid, and thus it can be an interesting dietary fat alternative as it can allow reaching the recommendation of consuming 20% of total diet energy in the form of monounsaturated fatty acids. In addition, olive-pomace oil also contains a wide range of minor components that may contribute to its healthy properties. The major components identified with healthy properties are triterpenic dialcohols and acids, squalene, tocopherols, sterols, fatty alcohols and phenolic compounds. The refining process, that the crude pomace-oil must undergo for commercial purposes, significantly reduces the content of phenolic compounds, while the other minor components remain at concentrations which can induce positive health effects, especially on cardiovascular health, outstanding pentacyclic triterpenes and aliphatic fatty alcohols in olive-pomace oil. Numerous in vitro and preclinical studies support that mainly the pure compounds, or extracts isolated from plant sources, play an important role in preventing cardiovascular disease and risk factors. Likewise, tocopherols, squalene and phytosterols, in addition to the minor fraction of phenolic compounds, have shown high biological activity with particular association to the cardiovascular function. In the light of the foregoing, and taking into consideration the absence of clinical studies with olive-pomace oil, it would be of great interest to develop randomized, crossover, controlled, double-blind studies to extend the knowledge and understanding on the health effects of olive-pomace olive.
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Affiliation(s)
- Raquel Mateos
- Department of Metabolism and Nutrition, Institute of Food Science, Technology and Nutrition (ICTAN), CSIC, Madrid, Spain
| | - Beatriz Sarria
- Department of Metabolism and Nutrition, Institute of Food Science, Technology and Nutrition (ICTAN), CSIC, Madrid, Spain
| | - Laura Bravo
- Department of Metabolism and Nutrition, Institute of Food Science, Technology and Nutrition (ICTAN), CSIC, Madrid, Spain
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17
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Ghaedi E, Kord-Varkaneh H, Mohammadi H, Askarpour M, Miraghajani M. Phytosterol Supplementation Could Improve Atherogenic and Anti-Atherogenic Apolipoproteins: A Systematic Review and Dose-Response Meta-Analysis of Randomized Controlled Trials. J Am Coll Nutr 2019; 39:82-92. [PMID: 31074692 DOI: 10.1080/07315724.2019.1605313] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Phytosterol and phytostanol (PS) supplementation is reported to improve atherogenic and anti-atherogenic apolipoproteins (Apo). The purpose of the present study is to critically investigate the effectiveness of PS supplementation on Apo in adults.A comprehensive search was conducted of all randomized controlled trials (RCTs) conducted up to September 2018 in the following databases: PubMed, Web of Science, Cochrane Library, and Scopus. Mean difference with 95% confidence intervals (CIs) were pooled using a random-effects model (DerSimonian-Laird method).Fifty-one arms from 37 RCTs were included in the present meta-analysis. Findings showed that PS supplementation and fortification increased Apo-AI (weighted mean difference [WMD]: 0.014 mg/dl, 95% CI: 0.001, 0.028, p = 0.042) and Apo-CII (WMD: 0.303 mg/dl, 95% CI: 0.084, 0.523, p = 0.007) and lowered Apo-B (WMD: -0.063 mg/dl, 95% CI: -0.075, -0.051, p < 0.001), Apo-B/Apo-A-I ratio (WMD: -0.044 mg/dl, 95% CI: -0.062, -0.025, p < 0.001), and Apo-E (WMD: -0.255 mg/dl, 95% CI: -0.474, -0.036, p = 0.023). However, PS supplementation did not have significant effects on Apo-AII and Apo-CIII. PS supplementation or fortification significantly changes Apo-E (r = -0.137, p nonlinearity = 0.006) and Apo-CIII (r = 1.26, p nonlinearity = 0.028) based on PS dosage (mg/d) and Apo-CIII (r = 3.34, p nonlinearity = 0.013) and Apo-CII (r = 1.09, p nonlinearity = 0.017) based on trial duration (weeks) in a nonlinear fashion.Based on our findings, supplements or fortified foods containing PS might have a considerable favorite effect in achieving Apo profile target; however, due to high heterogeneity among included studies, results must be interpreted with caution.KEY TEACHING POINTSCardiovascular diseases (CVDs) recognized as main public health concern worldwide with considerable mortality of all global deaths.Apo-lipoproteins are amphipathic molecules involved in the lipoprotein metabolism which introduced as biomarkers in the evaluation of CVD risk.Phytosterols bioactive components of plants have important biological functions in cholesterol metabolism in humans.Here we showed that phytosterols and phytostanols improve apo-lipoproteins profile of humans; finding from meta-analysis of randomized controlled trials.Phytosterols supplementation lowered atherogenic apo-lipoproteins (Apo-B and Apo-E) and increased anti-atherogenic apo-lipoproteins (Apo-AI, Apo-CII).
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Affiliation(s)
- Ehsan Ghaedi
- Department of Cellular and Molecular Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran.,Students' Scientific Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Hamed Kord-Varkaneh
- Student Research Committee, Department of Clinical Nutrition and Dietetics, Faculty of Nutrition and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hamed Mohammadi
- Student Research Committee, Department of Clinical Nutrition, School of Nutrition and Food Science, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Moein Askarpour
- Department of Community Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran
| | - Maryam Miraghajani
- National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,The Early Life Research Unit, Division of Child Health, Obstetrics and Gynaecology, University of Nottingham, Nottingham, UK
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18
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Banach M, Patti AM, Giglio RV, Cicero AFG, Atanasov AG, Bajraktari G, Bruckert E, Descamps O, Djuric DM, Ezhov M, Fras Z, von Haehling S, Katsiki N, Langlois M, Latkovskis G, Mancini GBJ, Mikhailidis DP, Mitchenko O, Moriarty PM, Muntner P, Nikolic D, Panagiotakos DB, Paragh G, Paulweber B, Pella D, Pitsavos C, Reiner Ž, Rosano GMC, Rosenson RS, Rysz J, Sahebkar A, Serban MC, Vinereanu D, Vrablík M, Watts GF, Wong ND, Rizzo M. The Role of Nutraceuticals in Statin Intolerant Patients. J Am Coll Cardiol 2018; 72:96-118. [PMID: 29957236 DOI: 10.1016/j.jacc.2018.04.040] [Citation(s) in RCA: 183] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2017] [Revised: 04/16/2018] [Accepted: 04/16/2018] [Indexed: 02/08/2023]
Abstract
Statins are the most common drugs administered for patients with cardiovascular disease. However, due to statin-associated muscle symptoms, adherence to statin therapy is challenging in clinical practice. Certain nutraceuticals, such as red yeast rice, bergamot, berberine, artichoke, soluble fiber, and plant sterols and stanols alone or in combination with each other, as well as with ezetimibe, might be considered as an alternative or add-on therapy to statins, although there is still insufficient evidence available with respect to long-term safety and effectiveness on cardiovascular disease prevention and treatment. These nutraceuticals could exert significant lipid-lowering activity and might present multiple non-lipid-lowering actions, including improvement of endothelial dysfunction and arterial stiffness, as well as anti-inflammatory and antioxidative properties. The aim of this expert opinion paper is to provide the first attempt at recommendation on the management of statin intolerance through the use of nutraceuticals with particular attention on those with effective low-density lipoprotein cholesterol reduction.
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Affiliation(s)
- Maciej Banach
- Department of Hypertension, Medical University of Lodz, and the Polish Mother's Memorial Hospital Research Institute (PMMHRI), Lodz, Poland; Cardiovascular Research Centre, University of Zielona Gora, Zielona Gora, Poland.
| | - Angelo Maria Patti
- Biomedical Department of Internal Medicine and Medical Specialties, University of Palermo, Palermo, Italy
| | - Rosaria Vincenza Giglio
- Biomedical Department of Internal Medicine and Medical Specialties, University of Palermo, Palermo, Italy
| | - Arrigo F G Cicero
- Department of Medicine and Surgery Sciences, University of Bologna, Bologna, Italy
| | - Atanas G Atanasov
- Institute of Genetics and Animal Breeding of the Polish Academy of Sciences, Jastrzebiec, Poland; Department of Pharmacognosy, University of Vienna, Vienna, Austria
| | - Gani Bajraktari
- Clinic of Cardiology, University Clinical Centre of Kosovo, and the Medical Faculty, University of Prishtina, Prishtina, Kosovo
| | - Eric Bruckert
- Institute of Cardiometabolism and Nutrition (ICAN), Endocrinology Department, Hopital Pitié Salpetrière, Paris, France
| | - Olivier Descamps
- Department of Internal Medicine, Centres Hospitaliers Jolimont, Haine Saint-Paul, Belgium; Department of Cardiology, Cliniques Universitaires Saint-Luc, Bruxells, Belgium
| | - Dragan M Djuric
- Institute of Medical Physiology "Richard Burian" Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Marat Ezhov
- National Cardiology Research Center, Moscow, Russia
| | - Zlatko Fras
- Preventive Cardiology Unit, Department of Vascular Medicine, Division of Internal Medicine, University Medical Centre Ljubljana, and Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
| | - Stephan von Haehling
- Department of Cardiology and Pneumology, University of Göttingen Medical Center, Göttingen, Germany
| | - Niki Katsiki
- Second Propaedeutic Department of Internal Medicine, Medical School, Aristotle University of Thessaloniki, Hippocration Hospital, Thessaloniki, Greece
| | - Michel Langlois
- Department of Laboratory Medicine, AZ Sint-Jan Hospital, Bruges, Belgium
| | - Gustavs Latkovskis
- Faculty of Medicine and Institute of Cardiology and Regenerative Medicine, University of Latvia, Riga, Latvia
| | - G B John Mancini
- Department of Medicine, Division of Cardiology, University of British Columbia, Vancouver, British Columbia, Canada
| | - Dimitri P Mikhailidis
- Department of Clinical Biochemistry, Royal Free Campus, University College London Medical School, University College London (UCL), London, United Kingdom
| | - Olena Mitchenko
- Dyslipidaemia Department, Institute of Cardiology AMS of Ukraine, Kiev, Ukraine
| | - Patrick M Moriarty
- Division of Clinical Pharmacology, Division of Internal Medicine, University of Kansas Medical Center, Kansas City, Kansas
| | - Paul Muntner
- Department of Epidemiology, University of Alabama Birmingham, Birmingham, Alabama
| | - Dragana Nikolic
- Biomedical Department of Internal Medicine and Medical Specialties, University of Palermo, Palermo, Italy
| | - Demosthenes B Panagiotakos
- School of Health Science and Education, Department of Nutrition and Dietetics, Harokopio University of Athens, Athens, Greece
| | - Gyorgy Paragh
- Department of Internal Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Bernhard Paulweber
- First Department of Internal Medicine, Paracelsus Private Medical University, Salzburg, Austria
| | - Daniel Pella
- 1st Department of Internal Medicine, Faculty of Medicine, Pavol Jozef Safarik University, Košice, Slovakia
| | - Christos Pitsavos
- Cardiology Clinic, School of Medicine, University of Athens, Athens, Greece
| | - Željko Reiner
- University Hospital Centre Zagreb, School of Medicine University of Zagreb, Department of Internal Medicine, Zagreb, Croatia
| | - Giuseppe M C Rosano
- Cardiovascular Clinical Academic Group St. George's Hospitals NHS Trust University of London, London, United Kingdom; IRCCS San Raffaele Roma, Rome, Italy
| | - Robert S Rosenson
- Mount Sinai Heart, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Jacek Rysz
- Department of Hypertension, Medical University of Lodz, and the Polish Mother's Memorial Hospital Research Institute (PMMHRI), Lodz, Poland; Cardiovascular Research Centre, University of Zielona Gora, Zielona Gora, Poland
| | - Amirhossein Sahebkar
- Biotechnology Research Center, Pharmaceutical Technology Institute and Neurogenic Inflammation Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Maria-Corina Serban
- Department of Functional Sciences, Discipline of Pathophysiology, "Victor Babes" University of Medicine and Pharmacy, Timisoara, Romania
| | - Dragos Vinereanu
- University of Medicine and Pharmacy "Carol Davila," and Department of Cardiology, University and Emergency Hospital, Bucharest, Romania
| | - Michal Vrablík
- Third Department of Internal Medicine, First Medical Faculty, Charles University, Prague, Czech Republic
| | - Gerald F Watts
- Cardiometabolic Service, Department of Cardiology, Royal Perth Hospital, and School of Medicine, University of Western Australia, Perth, Western Australia, Australia
| | - Nathan D Wong
- Heart Disease Prevention Program, Division of Cardiology, University of California, Irvine, California
| | - Manfredi Rizzo
- Biomedical Department of Internal Medicine and Medical Specialties, University of Palermo, Palermo, Italy
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19
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Kim Y, Keogh JB, Clifton PM. Benefits of Nut Consumption on Insulin Resistance and Cardiovascular Risk Factors: Multiple Potential Mechanisms of Actions. Nutrients 2017; 9:E1271. [PMID: 29165404 PMCID: PMC5707743 DOI: 10.3390/nu9111271] [Citation(s) in RCA: 95] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 11/02/2017] [Accepted: 11/14/2017] [Indexed: 02/07/2023] Open
Abstract
Epidemiological and clinical studies have indicated that nut consumption could be a healthy dietary strategy to prevent and treat type 2 diabetes (T2DM) and related cardiovascular disease (CVD). The objective of this review is to examine the potential mechanisms of action of nuts addressing effects on glycemic control, weight management, energy balance, appetite, gut microbiota modification, lipid metabolism, oxidative stress, inflammation, endothelial function and blood pressure with a focus on data from both animal and human studies. The favourable effects of nuts could be explained by the unique nutrient composition and bioactive compounds in nuts. Unsaturated fatty acids (monounsaturated fatty acids and polyunsaturated fatty acids) present in nuts may play a role in glucose control and appetite suppression. Fiber and polyphenols in nuts may also have an anti-diabetic effect by altering gut microbiota. Nuts lower serum cholesterol by reduced cholesterol absorption, inhibition of HMG-CoA reductase and increased bile acid production by stimulation of 7-α hydroxylase. Arginine and magnesium improve inflammation, oxidative stress, endothelial function and blood pressure. In conclusion, nuts contain compounds that favourably influence glucose homeostasis, weight control and vascular health. Further investigations are required to identify the most important mechanisms by which nuts decrease the risk of T2DM and CVD.
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Affiliation(s)
- Yoona Kim
- School of Pharmacy and Medical Sciences, University of South Australia, General Post Office Box 2471, Adelaide, SA 5001, Australia.
| | - Jennifer B Keogh
- School of Pharmacy and Medical Sciences, University of South Australia, General Post Office Box 2471, Adelaide, SA 5001, Australia.
| | - Peter M Clifton
- School of Pharmacy and Medical Sciences, University of South Australia, General Post Office Box 2471, Adelaide, SA 5001, Australia.
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20
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Vilcacundo R, Hernández-Ledesma B. Nutritional and biological value of quinoa ( Chenopodium quinoa Willd.). Curr Opin Food Sci 2017. [DOI: 10.1016/j.cofs.2016.11.007] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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21
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Navruz-Varli S, Sanlier N. Nutritional and health benefits of quinoa ( Chenopodium quinoa Willd.). J Cereal Sci 2016. [DOI: 10.1016/j.jcs.2016.05.004] [Citation(s) in RCA: 79] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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22
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Sanz-Buenhombre M, Villanueva S, Moro C, Tomás-Cobos L, Viadel B, Guadarrama A. Bioavailability and the mechanism of action of a grape extract rich in polyphenols in cholesterol homeostasis. J Funct Foods 2016. [DOI: 10.1016/j.jff.2015.11.044] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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23
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Acute intake of plant stanol esters induces changes in lipid and lipoprotein metabolism-related gene expression in the liver and intestines of mice. Lipids 2015; 50:529-41. [PMID: 25931382 PMCID: PMC4445258 DOI: 10.1007/s11745-015-4020-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2014] [Accepted: 04/04/2015] [Indexed: 11/01/2022]
Abstract
The kinetics of plant stanol uptake and routing in 8-week-old C57BL/6J mice were determined after a plant stanol ester gavage. In addition, acute changes in intestinal and hepatic gene expression were investigated. Mice were fed a plant sterol/stanol poor diet from weaning. At the age of 8 weeks, they received an oral gavage consisting of 0.25 mg cholesterol + 50 mg plant stanol esters dissolved in olive oil. Animals were euthanized at different time points. In a second comparable set-up, mesenteric lymph-cannulated versus sham-operated mice received the same oral gavage, which was now deuterium labeled. Intestinal and hepatic sitostanol concentrations increased within 15 min post-gavage. This rapid hepatic appearance was absent in lymph-cannulated mice, suggesting a very fast lymph-mediated uptake. Hepatic mRNA expression of SREBP2 and its target genes rapidly decreased, whereas expression of LXR target genes increased. The intestinal SREBP2 pathway was increased, whereas the expression of LXR target genes hardly changed. The fivefold and sixfold increased expression of intestinal LDLr and PCSK9 is suggestive of TICE activation. We conclude that in C57BL/6J mice plant stanol kinetics are fast, and affect intestinal and hepatic gene expression within 15 min postprandial after lymph-mediated uptake.
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Graf BL, Rojas-Silva P, Rojo LE, Delatorre-Herrera J, Baldeón ME, Raskin I. Innovations in Health Value and Functional Food Development of Quinoa ( Chenopodium quinoa Willd.). Compr Rev Food Sci Food Saf 2015; 14:431-445. [PMID: 27453695 DOI: 10.1111/1541-4337.12135] [Citation(s) in RCA: 129] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Quinoa (Chenopodium quinoa Willd., Amaranthaceae) is a grain-like, stress-tolerant food crop that has provided subsistence, nutrition, and medicine for Andean indigenous cultures for thousands of years. Quinoa contains a high content of health-beneficial phytochemicals, including amino acids, fiber, polyunsaturated fatty acids, vitamins, minerals, saponins, phytosterols, phytoecdysteroids, phenolics, betalains, and glycine betaine. Over the past 2 decades, numerous food and nutraceutical products and processes have been developed from quinoa. Furthermore, 4 clinical studies have demonstrated that quinoa supplementation exerts significant, positive effects on metabolic, cardiovascular, and gastrointestinal health in humans. However, vast challenges and opportunities remain within the scientific, agricultural, and development sectors to optimize quinoa's role in the promotion of global human health and nutrition.
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Affiliation(s)
- Brittany L Graf
- Dept. of Plant Biology and Pathology, Rutgers Univ., 59 Dudley Rd., New Brunswick, NJ 08901, U.S.A
| | - Patricio Rojas-Silva
- Dept. of Plant Biology and Pathology, Rutgers Univ., 59 Dudley Rd., New Brunswick, NJ 08901, U.S.A
| | - Leonel E Rojo
- Facultad de Ciencias de la Salud, Univ. Arturo Prat, Casilla 121, Iquique, Chile
| | - Jose Delatorre-Herrera
- Facultad de Recursos Naturales Renovables, Univ. Arturo Prat, Casilla 121, Iquique, Chile
| | - Manuel E Baldeón
- Centro de Investigación Traslacional, Univ. de Las Américas, Quito, Ecuador
| | - Ilya Raskin
- Dept. of Plant Biology and Pathology, Rutgers Univ., 59 Dudley Rd., New Brunswick, NJ 08901, U.S.A
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Mannarino MR, Ministrini S, Pirro M. Nutraceuticals for the treatment of hypercholesterolemia. Eur J Intern Med 2014; 25:592-9. [PMID: 24997485 DOI: 10.1016/j.ejim.2014.06.008] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2013] [Revised: 04/07/2014] [Accepted: 06/10/2014] [Indexed: 12/15/2022]
Abstract
Hypercholesterolemia is a well-established modifiable cardiovascular risk factor and its treatment is an essential aim in preventing cardiovascular disease. Current guidelines highlight lifestyle intervention as a primary issue in the treatment of the patient with hypercholesterolemia. Therapeutic lifestyle changes are often insufficient to achieve desirable cholesterol levels. This is particularly true for high risk patients; however, also low risk patients, whose cholesterol levels are not necessarily far from recommended targets, have either sub-optimal or even significantly increased lipid levels. Nutraceuticals are borderline devices between nutrients and drugs providing a supplementation of particular nutrients with beneficial effects on health. Several nutraceuticals have been suggested to improve plasma lipid profile. The literature counted over 40 nutraceutical substances with a supposed beneficial effect on lipid metabolism; for some of them a number of clinical trials highlighted a cholesterol lowering effect and a possible positive influence on cardiovascular prognosis. The aim of this article is to review the main evidences supporting or denying the efficacy and safety of some of the most commonly used nutraceuticals with supposed cholesterol lowering activity.
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Affiliation(s)
- Massimo R Mannarino
- Unit of Internal Medicine, Angiology and Arteriosclerosis Diseases, Department of Medicine, University of Perugia, Perugia, Italy.
| | - Stefano Ministrini
- Unit of Internal Medicine, Angiology and Arteriosclerosis Diseases, Department of Medicine, University of Perugia, Perugia, Italy
| | - Matteo Pirro
- Unit of Internal Medicine, Angiology and Arteriosclerosis Diseases, Department of Medicine, University of Perugia, Perugia, Italy
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Durairaj V, Hoda M, Shakya G, Babu SPP, Rajagopalan R. Phytochemical screening and analysis of antioxidant properties of aqueous extract of wheatgrass. ASIAN PAC J TROP MED 2014; 7S1:S398-404. [DOI: 10.1016/s1995-7645(14)60265-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2014] [Revised: 05/19/2014] [Accepted: 06/23/2014] [Indexed: 11/28/2022] Open
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27
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Stępnik KE, Malinowska I, Rój E. in vitro and in silico determination of oral, jejunum and Caco-2 human absorption of fatty acids and polyphenols. Micellar liquid chromatography. Talanta 2014; 130:265-73. [PMID: 25159408 DOI: 10.1016/j.talanta.2014.06.039] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2013] [Revised: 06/13/2014] [Accepted: 06/19/2014] [Indexed: 11/16/2022]
Abstract
In this investigation chosen saturated, mono- and polyunsaturated fatty acids as well as polyphenols have been analyzed. The main aim of this study was to determine oral, jejunum and Caco-2 human absorption of chosen fatty acids and polyphenols using in vitro and in silico methods. For in vitro determination of human drug absorption, the usefulness of Micellar Liquid Chromatography (MLC) with mobile phases containing different surfactants (including Brij35-Biopartitioning Micellar Chromatography (BMC)) has been confirmed. On the basis of Foley's equation, 1/k vs. CM correlations for the tested compounds have been done. Satisfactory linearity of the relationships was found over the whole eluents composition range studied with R(2) approximately 0.99 in each case. Moreover, the analyte-micelle association constants (Kma) from Foley's equation have been compared for different micellar environments, containing Brij35, SDS and CTAB as a main component of micellar mobile phases. Completely new models describing human oral as well as Caco-2 and jejunum absorption have been constructed and compared with the cited models. These models are based on the Abraham descriptors and lipophilicity parameters as well as steric descriptors. Furthermore, many different correlations between physicochemical parameters and human intestinal absorption have been done, e.g. the correlation between human jejunum permeability estimated in silico and received using LSER parameters was excellent (R(2) nearly 0.99). Chromatographic parameters have been collated with steric, electronic and physicochemical ones using QRAR (Quantitative Retention - Activity Relationships) and QSAR (Quantitative Structure - Activity Relationships) models. Moreover, retention BMC data have been compared with lipophilicity parameter logPo/w (n-octanol-water partition coefficient). The influence of lipophilicity on oral absorption (%) has been checked. The correlation between predicted oral absorption (%) and logPo/w has been done. Obtained R(2) was 0.82. On the basis of chromatographic, lipophilicity, steric and different physicochemical parameters, the principal components analysis (PCA) has been done.
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Affiliation(s)
- Katarzyna E Stępnik
- Faculty of Chemistry, Chair of Physical Chemistry, Department of Planar Chromatography, Maria Curie - Skłodowska University, M. Curie - Skłodowska Sq. 3, 20-031 Lublin, Poland.
| | - Irena Malinowska
- Faculty of Chemistry, Chair of Physical Chemistry, Department of Planar Chromatography, Maria Curie - Skłodowska University, M. Curie - Skłodowska Sq. 3, 20-031 Lublin, Poland
| | - Edward Rój
- Fertilizer Research Institute, Tysiąclecia Państwa Polskiego Ave.13a, 24-110 Puławy, Poland
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Othman RA, Myrie SB, Jones PJH. Non-cholesterol sterols and cholesterol metabolism in sitosterolemia. Atherosclerosis 2013; 231:291-9. [PMID: 24267242 DOI: 10.1016/j.atherosclerosis.2013.09.038] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2013] [Revised: 09/05/2013] [Accepted: 09/30/2013] [Indexed: 12/14/2022]
Abstract
Sitosterolemia (STSL) is a rare autosomal recessive disease, manifested by extremely elevated plant sterols (PS) in plasma and tissue, leading to xanthoma and premature atherosclerotic disease. Therapeutic approaches include limiting PS intake, interrupting enterohepatic circulation of bile acid using bile acid binding resins such as cholestyramine, and/or ileal bypass, and inhibiting intestinal sterol absorption by ezetimibe (EZE). The objective of this review is to evaluate sterol metabolism in STSL and the impact of the currently available treatments on sterol trafficking in this disease. The role of PS in initiation of xanthomas and premature atherosclerosis is also discussed. Blocking sterols absorption with EZE has revolutionized STSL patient treatment as it reduces circulating levels of non-cholesterol sterols in STSL. However, none of the available treatments including EZE have normalized plasma PS concentrations. Future studies are needed to: (i) explore where cholesterol and non-cholesterol sterols accumulate, (ii) assess to what extent these sterols in tissues can be mobilized after blocking their absorption, and (iii) define the factors governing sterol flux.
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Affiliation(s)
- Rgia A Othman
- Department of Human Nutritional Sciences, University of Manitoba, Winnipeg, Manitoba, Canada; Richardson Centre for Functional Foods and Nutraceuticals, University of Manitoba, Winnipeg, Manitoba, Canada
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Vallianou I, Peroulis N, Pantazis P, Hadzopoulou-Cladaras M. Camphene, a plant-derived monoterpene, reduces plasma cholesterol and triglycerides in hyperlipidemic rats independently of HMG-CoA reductase activity. PLoS One 2011; 6:e20516. [PMID: 22073134 PMCID: PMC3207810 DOI: 10.1371/journal.pone.0020516] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2011] [Accepted: 05/02/2011] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Central to the pathology of coronary heart disease is the accumulation of lipids, cholesterol and triglycerides, within the intima of arterial blood vessels. The search for drugs to treat dislipidemia, remains a major pharmaceutical focus. In this study, we evaluated the hypolipidemic properties of the essential oil from Chios mastic gum (MGO). METHODOLOGY/PRINCIPAL FINDINGS The hypolipidemic effect of MGO was investigated in naïve as well as in rats susceptible to detergent-induced hyperlipidemia. Serum cholesterol and triglycerides were determined using commercial kits. HMG-CoA (3-hydroxy-3-methylglutaryl coenzyme A) reductase activity was measured in HepG2 cell extracts using a radioactive assay; cellular cholesterol and cholesterol esters were assessed using gas chromatography. MGO administration into naïve rats resulted in a dose-dependent reduction in the constitutive synthesis of serum cholesterol and triglycerides. In hyperlipidemic rats, MGO treatment had also a strong hypolipidemic effect. By testing various components of MGO, we show for the first time that the hypolipidemic action is associated with camphene. Administration of camphene at a dose of 30 µg/gr of body weight in hyperlipidemic rats resulted in a 54.5% reduction of total cholesterol (p<0.001), 54% of Low Density Lipoprotein (LDL)-cholesterol (p<0.001) and 34.5% of triglycerides (p<0.001). Treatment of HepG2 cells with camphene led to a decrease in cellular cholesterol content to the same extend as mevinolin, a known HMG-CoA reductase inhibitor. The hypolipidemic action of camphene is independent of HMG-CoA reductase activity, suggesting that its hypocholesterolemic and hypotriglyceridemic effects are associated with a mechanism of action different than that of statins. CONCLUSIONS Given the critical role that the control of hyperlipidemia plays in cardiovascular disease, the results of our study provide insights into the use of camphene as an alternative lipid lowering agent and merits further evaluation.
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Affiliation(s)
- Ioanna Vallianou
- Department of Genetics, Development and Molecular Biology, School of Biology, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Nikolaos Peroulis
- Department of Genetics, Development and Molecular Biology, School of Biology, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | | | - Margarita Hadzopoulou-Cladaras
- Department of Genetics, Development and Molecular Biology, School of Biology, Aristotle University of Thessaloniki, Thessaloniki, Greece
- * E-mail:
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Berryman CE, Preston AG, Karmally W, Deckelbaum RJ, Kris-Etherton PM. Effects of almond consumption on the reduction of LDL-cholesterol: a discussion of potential mechanisms and future research directions. Nutr Rev 2011; 69:171-85. [DOI: 10.1111/j.1753-4887.2011.00383.x] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Sabeva NS, McPhaul CM, Li X, Cory TJ, Feola DJ, Graf GA. Phytosterols differentially influence ABC transporter expression, cholesterol efflux and inflammatory cytokine secretion in macrophage foam cells. J Nutr Biochem 2010; 22:777-83. [PMID: 21111593 DOI: 10.1016/j.jnutbio.2010.07.002] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2009] [Revised: 05/26/2010] [Accepted: 07/09/2010] [Indexed: 11/27/2022]
Abstract
Phytosterol supplements lower low-density lipoprotein (LDL) cholesterol, but accumulate in vascular lesions of patients and limit the anti-atherosclerotic effects of LDL lowering in apolipoprotein E (Apo E)-deficient mice, suggesting that the cholesterol-lowering benefit of phytosterol supplementation may not be fully realized. Individual phytosterols have cell-type specific effects that may be either beneficial or deleterious with respect to atherosclerosis, but little is known concerning their effects on macrophage function. The effects of phytosterols on ABCA1 and ABCG1 abundance, cholesterol efflux and inflammatory cytokine secretion were determined in cultured macrophage foam cells. Among the commonly consumed phytosterols, stigmasterol increased expression of ABCA1 and ABCG1 and increased efflux of cholesterol to apolipoprotein (Apo) AI and high-density lipoprotein (HDL). Campesterol and sitosterol had no effect on ABCA1 or ABCG1 levels. Sitosterol had no effect on cholesterol efflux to Apo AI or HDL, whereas campesterol had a modest but significant reduction in cholesterol efflux to HDL in THP-1 macrophages. Whereas stigmasterol blunted aggregated LDL (agLDL) induced increases in tumor necrosis factor (TNF)-α, interleukin (IL)-6 and IL-1β secretion, sitosterol exacerbated these effects. The presence of campesterol had no effect on agLDL-induced inflammatory cytokine secretion from THP-1 macrophages. In conclusion, the presence of stigmasterol in modified lipoproteins promoted cholesterol efflux and suppressed inflammatory cytokine secretion in response to lipid loading in macrophage foam cells. While campesterol was largely inert, the presence of sitosterol increased the proinflammatory cytokine secretion.
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Affiliation(s)
- Nadezhda S Sabeva
- Pharmaceutical Sciences, College of Pharmacy, Cardiovascular Research Center and Graduate Center for Nutritional Sciences, University of Kentucky, Lexington, KY 40536-0082, USA
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Rideout TC, Harding SV, Jones PJH. Consumption of plant sterols reduces plasma and hepatic triglycerides and modulates the expression of lipid regulatory genes and de novo lipogenesis in C57BL/6J mice. Mol Nutr Food Res 2010; 54 Suppl 1:S7-13. [PMID: 20333723 DOI: 10.1002/mnfr.201000027] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
To investigate emerging clinical data suggesting a triglyceride (TAG)-lowering response to plant sterol (PS) therapy, we characterized changes in TAG metabolism in 16 C57BL/6J mice fed a basal control diet (CON) or the CON diet supplemented with 2% PS for 6 wk. PS consumption reduced (p<0.05) plasma (-28%) and hepatic (-30%) TAG concentrations compared with CON mice. PS consumption increased (p<0.05) hepatic lipogenic gene expression (sterol-regulatory-element-binding protein 1c, 2.4-fold of CON; fatty acid synthase, 6.5-fold of CON) and de novo lipogenesis (4.51+/-0.72 versus 2.82+/-0.61%/day) compared with CON. PS consumption increased (p<0.05) fecal palmitate and stearate excretion and reduced body weight gain compared with CON mice. Although no change in the transcription of intestinal fatty acid absorptive genes was observed, peroxisome proliferator-activated receptor alpha mRNA was reduced (p<0.05, 2.0-fold of CON) in the PS-fed mice. In conclusion, PS-fed C57BL/6J mice showed pronounced reductions in plasma and hepatic TAG concentrations despite increases in hepatic lipogenic gene expression and de novo lipogenesis. Interference with intestinal fatty acid/TAG metabolism as suggested by increased fecal fatty acid loss and reduced weight gain may be associated with the TAG-lowering response to PS consumption.
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Affiliation(s)
- Todd C Rideout
- Richardson Centre for Functional Foods and Nutraceuticals, Winnipeg, MB, Canada.
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Do HQ, Van Landeghem L, Wielgosz-Collin G, Takoudju M, Huvelin JM, Kornprobst JM, Bard JM, Barnathan G, Nazih H. Unusual sterolic mixture, and 24-isopropylcholesterol, from the sponge Ciocalypta sp. reduce cholesterol uptake and basolateral secretion in Caco-2 cells. J Cell Biochem 2009; 106:659-65. [PMID: 19160412 DOI: 10.1002/jcb.22047] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
An unusual sterolic mixture (82.3% of 24-isopropylated sterols) and its major component, 24-isopropylcholesterol, isolated from a marine sponge, Ciocalypta sp. (Halichondriidae), reduce cholesterol uptake, basolateral secretion and ACAT-2 mRNA expression and increase the expression of ABCA1 mRNA in Caco-2 cells. The decreases of cholesterol uptake and secretion induced by 24-isopropylcholesterol alone were more than that of both the sterolic mixture and beta-sitosterol. These data add a new sterol, 24-isopropylcholesterol, to sterols that may reduce intestinal cholesterol absorption.
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Affiliation(s)
- Hong Quang Do
- Faculté de Pharmacie, Laboratoire de Biochimie pharmaceutique, Mer-Molécules-Santé, EA 2160, Université de Nantes, Nantes, France
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Calpe-Berdiel L, Escolà-Gil JC, Blanco-Vaca F. New insights into the molecular actions of plant sterols and stanols in cholesterol metabolism. Atherosclerosis 2008; 203:18-31. [PMID: 18692849 DOI: 10.1016/j.atherosclerosis.2008.06.026] [Citation(s) in RCA: 175] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2008] [Revised: 05/15/2008] [Accepted: 06/18/2008] [Indexed: 12/25/2022]
Abstract
Plant sterols and stanols (phytosterols/phytostanols) are known to reduce serum low-density lipoprotein (LDL)-cholesterol level, and food products containing these plant compounds are widely used as a therapeutic dietary option to reduce plasma cholesterol and atherosclerotic risk. The cholesterol-lowering action of phytosterols/phytostanols is thought to occur, at least in part, through competition with dietary and biliary cholesterol for intestinal absorption in mixed micelles. However, recent evidence suggests that phytosterols/phytostanols may regulate proteins implicated in cholesterol metabolism both in enterocytes and hepatocytes. Important advances in the understanding of intestinal sterol absorption have provided potential molecular targets of phytosterols. An increased activity of ATP-binding cassette transporter A1 (ABCA1) and ABCG5/G8 heterodimer has been proposed as a mechanism underlying the hypocholesterolaemic effect of phytosterols. Conclusive studies using ABCA1 and ABCG5/G8-deficient mice have demonstrated that the phytosterol-mediated inhibition of intestinal cholesterol absorption is independent of these ATP-binding cassette (ABC) transporters. Other reports have proposed a phytosterol/phytostanol action on cholesterol esterification and lipoprotein assembly, cholesterol synthesis and apolipoprotein (apo) B100-containing lipoprotein removal. The accumulation of phytosterols in ABCG5/G8-deficient mice, which develop features of human sitosterolaemia, disrupts cholesterol homeostasis by affecting sterol regulatory element-binding protein (SREBP)-2 processing and liver X receptor (LXR) regulatory pathways. This article reviews the progress to date in studying these effects of phytosterols/phytostanols and the molecular mechanisms involved.
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Affiliation(s)
- Laura Calpe-Berdiel
- Servei de Bioquímica, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
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Puljak L, Parameswara V, Dolovcak S, Waldrop SL, Emmett D, Esser V, Fitz JG, Kilic G. Evidence for AMPK-dependent regulation of exocytosis of lipoproteins in a model liver cell line. Exp Cell Res 2008; 314:2100-9. [PMID: 18405894 DOI: 10.1016/j.yexcr.2008.03.002] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2007] [Revised: 02/20/2008] [Accepted: 03/03/2008] [Indexed: 11/29/2022]
Abstract
5'-AMP-activated kinase (AMPK) plays a key role in the regulation of cellular lipid metabolism. The contribution of vesicular exocytosis to this regulation is not known. Accordingly, we studied the effects of AMPK on exocytosis and intracellular lipid content in a model liver cell line. Activation of AMPK by metformin or 5-aminoimidazole-4-carboxamide-1-beta-d-ribofuranoside (AICAR) increased the rates of constitutive exocytosis by about 2-fold. Stimulation of exocytosis by AMPK occurred within minutes, and persisted after overnight exposure to metformin or AICAR. Activation of AMPK also increased the amount of triacylglycerol (TG) and apolipoprotein B (apoB) secreted from lipid-loaded cells. These effects were accompanied by a decrease in the intracellular lipid content indicating that exocytosis of lipoproteins was involved in these lipid-lowering effects. While AMPK increased the rates of fatty acid oxidation (FAO), the lipid-lowering effects were quantitatively significant even after inhibition of FAO with R-etomoxir. These results suggest that hepatic AMPK stimulates constitutive exocytosis of lipoproteins, which may function in parallel with FAO to regulate intracellular lipid content.
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Affiliation(s)
- Livia Puljak
- Department of Internal Medicine, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, Dallas TX 75390-9151, USA
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Klopotek A, Hirche F, Eder K. PPAR gamma ligand troglitazone lowers cholesterol synthesis in HepG2 and Caco-2 cells via a reduced concentration of nuclear SREBP-2. Exp Biol Med (Maywood) 2006; 231:1365-72. [PMID: 16946405 DOI: 10.1177/153537020623100810] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Cholesterol synthesis in animal cells is regulated by sterol regulatory element-binding protein (SREBP)-2. The objective of this study was to investigate whether activation of peroxisome proliferator-activatedreceptor (PPAR)-gamma influences the SREBP-2 dependent cholesterol synthesis in liver and intestinal cells. Therefore, HepG2 and Caco-2 cells were incubated with and without 10 or 30 microM of troglitazone, a synthetic PPAR gamma agonist, for 4 hrs. Incubation with 10 or 30 microM of troglitazone caused a significant, dose-dependent reduction of cholesterol synthesis in both HepG2 and Caco-2 cells (P < 0.05). HepG2 and Caco-2 cells incubated with 10 or 30 microM of troglitazone had also lower mRNA concentrations and lower nuclear protein concentrations of SREBP-2 than untreated control cells (P < 0.05). mRNA concentrations of the SREBP-2 target genes HMG-CoA reductase and LDL receptor were also reduced in HepG2 and Caco-2 cells treated with 30 microM of troglitazone compared to control cells (P < 0.05). In conclusion, this study shows that PPAR gamma activation by troglitazone lowers the cholesterol synthesis in HepG2 and Caco-2 cells by reducing the concentration of nuclear SREBP-2 and successive downregulation of its target genes involved in cholesterol synthesis.
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Affiliation(s)
- Anett Klopotek
- Institute of Nutritional Sciences, Martin-Luther-University Halle-Wittenberg, D-06108 Halle/Saale, Germany
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Plösch T, Kruit JK, Bloks VW, Huijkman NCA, Havinga R, Duchateau GSMJE, Lin Y, Kuipers F. Reduction of cholesterol absorption by dietary plant sterols and stanols in mice is independent of the Abcg5/8 transporter. J Nutr 2006; 136:2135-40. [PMID: 16857831 DOI: 10.1093/jn/136.8.2135] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Dietary supplementation with plant sterols, stanols, and their esters reduces intestinal cholesterol absorption, thus lowering plasma LDL cholesterol concentration in humans. It was suggested that these beneficial effects are attributable in part to induction of genes involved in intestinal cholesterol transport, e.g., Abcg5 and Abcg8, via the liver X receptor (LXR), but direct proof is lacking. Male C57BL/6J mice were fed a purified diet (control), diets containing cholesterol (0.12 g/100 g) only, or in combination with either plant sterols or stanols (0.5 g/100 g) for 4 wk. Plant sterols and stanols dramatically increased neutral fecal sterol excretion (2.2 and 1.4-fold, respectively, compared with cholesterol-fed mice; P < 0.05). Cholesterol and cholesterol ester concentrations were higher in livers of mice fed cholesterol compared with controls (+135% and +925%; P < 0.05). Plant sterols and stanols completely prevented cholesterol accumulation as well as induction of LXR target genes in liver. Feeding plant sterols and stanols did not alter intestinal expression of Abcg5, Abcg8, or other LXR target genes nor of Npc1l1. Fractional cholesterol absorption in Abcg5-/- mice was reduced to the same extent by dietary plant sterols (49%) as in wild-type littermates (44%). Plant sterol and stanol-induced reduction of cholesterol absorption in mice is not associated with upregulation of intestinal LXR target genes nor is it influenced by Abcg5-deficiency. Our data indicate that dietary plant sterols and stanols inhibit cholesterol absorption within the intestinal lumen independently of LXR.
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Affiliation(s)
- Torsten Plösch
- Center for Liver, Digestive and Metabolic Diseases, Laboratory of Pediatrics, University Medical Center Groningen, Groningen, The Netherlands.
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