1
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Aizawa H. Impact of micelle characteristics on cholesterol absorption and ezetimibe inhibition: Insights from Niemann-Pick C1-like 1 binding and molecular structure. J Liposome Res 2024; 34:386-398. [PMID: 37905576 DOI: 10.1080/08982104.2023.2274424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2023] [Accepted: 10/18/2023] [Indexed: 11/02/2023]
Abstract
Yamanashi et al., conducted a study on the absorption of cholesterol and β-sitosterol, as well as the inhibitory effect of ezetimibe (EZE). They used CaCo-2 cells to simulate the intestines and investigated how different mixed micelles, acting as carriers, were absorbed into these cells through the Niemann-Pick C1-like 1 (NPC1L1) protein. The study focused on the impact of micelle shape, size, and zeta potential on absorption and the inhibitory effect of EZE. I utilized small-angle X-ray scattering and a zeta potential measuring device to measure these characteristics. The findings revealed a two-step mechanism: NPC1L1 selectively bound micelles based on their shape and size, and once bound, the absorption was regulated by the molecular structure of the micelle components. EZE's inhibitory effect changed with micelle composition, influencing micelle size and shape. EZE initially acted on the micelle's shape and size, and then NPC1L1 selectively bound micelles based on their shape and size, allowing EZE to directly inhibit absorption by interacting with NPC1L1. This groundbreaking discovery challenges existing concepts and holds significant implications for researchers in drug development, as well as physicians and pharmacists.
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Affiliation(s)
- Hideki Aizawa
- Faculty of Pharmaceutical Sciences, Setsunan University, Hirakata, Japan
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2
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Šošić-Jurjević B, Lütjohann D, Trifunović S, Pavlović S, Borković Mitić S, Jovanović L, Ristić N, Marina L, Ajdžanović V, Filipović B. Differences in Cholesterol Metabolism, Hepato-Intestinal Aging, and Hepatic Endocrine Milieu in Rats as Affected by the Sex and Age. Int J Mol Sci 2023; 24:12624. [PMID: 37628805 PMCID: PMC10454938 DOI: 10.3390/ijms241612624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 08/06/2023] [Accepted: 08/08/2023] [Indexed: 08/27/2023] Open
Abstract
Age and sex influence serum cholesterol levels, but the underlying mechanisms remain unclear. To investigate further, we measured cholesterol, precursors (surrogate synthesis markers), degradation products (oxysterols and bile acid precursors) in serum, the liver, jejunum, and ileum, as well as serum plant sterols (intestinal absorption markers) in male and female Wistar rats (4 and 24 months old). The analysis of histomorphometric and oxidative stress parameters (superoxide dismutase, catalase, glutathione-related enzyme activities, lipid peroxide, and protein carbonyl concentrations) in the liver and jejunum offered further insights into the age- and sex-related differences. The hepatic gene expression analysis included AR, ERα, and sex-specific growth hormone-regulated (Cyp2c11 and Cyp2c12) and thyroid-responsive (Dio1, Tbg, and Spot 14) genes by qPCR. We observed age-related changes in both sexes, with greater prominence in females. Aged females had significantly higher serum cholesterol (p < 0.05), jejunum cholesterol (p < 0.05), and serum plant sterols (p < 0.05). They exhibited poorer hepato-intestinal health compared with males, which was characterized by mild liver dysfunction (hydropic degeneration, increased serum ALT, p < 0.05, and decreased activity of some antioxidant defense enzymes, p < 0.05), mononuclear inflammation in the jejunal lamina propria, and age-related decreases in jejunal catalase and glutathione peroxidase activity (p < 0.05). Aged females showed increased levels of 27-hydroxycholesterol (p < 0.05) and upregulated ERα gene expression (p < 0.05) in the liver. Our study suggests that the more significant age-related increase in serum cholesterol in females is associated with poorer hepato-intestinal health and increased jejunal cholesterol absorption. The local increase in 27-hydroxycholesterol during aging might reduce the hepatoprotective effects of endogenous estrogen in the female liver.
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Affiliation(s)
- Branka Šošić-Jurjević
- Department of Cytology, Institute for Biological Research “Siniša Stanković”—National Institute of Republic of Serbia, University of Belgrade, Bulevar Despota Stefana 142, 11060 Belgrade, Serbia; (S.T.); (N.R.); (V.A.); (B.F.)
| | - Dieter Lütjohann
- Institute of Clinical Chemistry and Clinical Pharmacology, University Hospital Bonn, Venusberg-Campus 1, 53127 Bonn, Germany;
| | - Svetlana Trifunović
- Department of Cytology, Institute for Biological Research “Siniša Stanković”—National Institute of Republic of Serbia, University of Belgrade, Bulevar Despota Stefana 142, 11060 Belgrade, Serbia; (S.T.); (N.R.); (V.A.); (B.F.)
| | - Slađan Pavlović
- Department of Physiology, Institute for Biological Research “Siniša Stanković”—National Institute of Republic of Serbia, University of Belgrade, Bulevar Despota Stefana 142, 11060 Belgrade, Serbia; (S.P.); (S.B.M.)
| | - Slavica Borković Mitić
- Department of Physiology, Institute for Biological Research “Siniša Stanković”—National Institute of Republic of Serbia, University of Belgrade, Bulevar Despota Stefana 142, 11060 Belgrade, Serbia; (S.P.); (S.B.M.)
| | - Ljubiša Jovanović
- Department of Pathology and Medical Cytology, University Clinical Center of Serbia, Faculty of Medicine, University of Belgrade, Dr. Koste Todorovića 26, 11000 Belgrade, Serbia;
| | - Nataša Ristić
- Department of Cytology, Institute for Biological Research “Siniša Stanković”—National Institute of Republic of Serbia, University of Belgrade, Bulevar Despota Stefana 142, 11060 Belgrade, Serbia; (S.T.); (N.R.); (V.A.); (B.F.)
| | - Ljiljana Marina
- National Centre for Infertility and Endocrinology of Gender, Clinic for Endocrinology, Diabetes and Metabolic Diseases, Faculty of Medicine, University of Belgrade, Koste Todorovića 6, 11000 Belgrade, Serbia;
| | - Vladimir Ajdžanović
- Department of Cytology, Institute for Biological Research “Siniša Stanković”—National Institute of Republic of Serbia, University of Belgrade, Bulevar Despota Stefana 142, 11060 Belgrade, Serbia; (S.T.); (N.R.); (V.A.); (B.F.)
| | - Branko Filipović
- Department of Cytology, Institute for Biological Research “Siniša Stanković”—National Institute of Republic of Serbia, University of Belgrade, Bulevar Despota Stefana 142, 11060 Belgrade, Serbia; (S.T.); (N.R.); (V.A.); (B.F.)
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3
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Effect of the Addition of Buckwheat Sprouts Modified with the Addition of Saccharomyces cerevisiae var. boulardii to an Atherogenic Diet on the Metabolism of Sterols, Stanols and Fatty Acids in Rats. Molecules 2022; 27:molecules27144394. [PMID: 35889272 PMCID: PMC9318738 DOI: 10.3390/molecules27144394] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 07/02/2022] [Accepted: 07/05/2022] [Indexed: 02/04/2023] Open
Abstract
The aim of the study was to evaluate the effect of the addition of Fagopyrum esculentum Moench buckwheat sprouts modified with the addition of Saccharomyces cerevisiae var. boulardii to an atherogenic diet on the metabolism of sterols and fatty acids in rats. It was noticed in the study that the group fed with modified sprouts (HFDPRS) had a greater amount of sterols by 75.2%, compared to the group fed on an atherogenic diet (HFD). The content of cholesterol in the liver and feces was lower in the HFDPRS group than the HFD group. In the serum of the HFDPRS group, a more significant amount of the following acids was observed: C18:2 (increase by 13.5%), C20:4 (increase by 15.1%), and C22:6 (increase by 13.1%), compared to the HFDCS group. Regarding the biochemical parameters, it was noted that the group fed the diet with the addition of probiotic-rich sprouts diet had lower non-HDL, LDL-C and CRP ratios compared to the group fed the high-fat diet. The obtained results indicate that adding modified buckwheat sprouts to the diet by adding the probiotic strain of the yeast may have a significant impact on the metabolism of the indicated components in the organism.
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Nunes VS, da Silva EJ, Ferreira GDS, de Assis SIS, Cazita PM, Nakandakare ER, Zago VHDS, de Faria EC, Quintão ECR. The Plasma Distribution of Non-cholesterol Sterol Precursors and Products of Cholesterol Synthesis and Phytosterols Depend on HDL Concentration. Front Nutr 2022; 9:723555. [PMID: 35299760 PMCID: PMC8921769 DOI: 10.3389/fnut.2022.723555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Accepted: 01/17/2022] [Indexed: 11/17/2022] Open
Abstract
Non-cholesterol sterols are transported in plasma lipoproteins and are consequently important in cholesterol metabolism. We investigated the distribution of non-cholesterol sterol precursors of cholesterol synthesis (NCSPCS), oxysterols, and phytosterols in lipoproteins of healthy subjects differing according to HDL-Cholesterol (HDL-C) plasma levels. Elevated NCSPCS (desmosterol, lathosterol) in the High HDL group suggests that HDL exports these sterols from cells, but not the cholesterol metabolite 24-OHC which was higher in the Low HDL group than in the High HDL group. 27-hydroxycholesterol (27OH-C) plasma levels did not differ between groups. Percentage of NCSPCS and phytosterols predominates in LDL, but did not differ between groups. Thirty percent of desmosterol and lathosterol are present in HDL, with the High HDL group carrying higher percentage of these sterols. A high percentage of campesterol and sitosterol in HDL suggests that phytosterols are absorbed by enterocytes, and that HDL could be a marker of the ABCA1/ApoA1 intestinal activity.
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Affiliation(s)
- Valéria Sutti Nunes
- Laboratorio de Lipides (LIM10), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
- *Correspondence: Valéria Sutti Nunes ;
| | - Eliton Juniro da Silva
- Laboratorio de Lipides (LIM10), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
| | - Guilherme da Silva Ferreira
- Laboratorio de Lipides (LIM10), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
| | - Sayonara Ivana Santos de Assis
- Laboratorio de Lipides (LIM10), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
| | - Patrícia Miralda Cazita
- Laboratorio de Lipides (LIM10), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
| | - Edna Regina Nakandakare
- Laboratorio de Lipides (LIM10), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
| | - Vanessa Helena de Souza Zago
- Department of Clinical Pathology, School of Medical Sciences, State University of Campinas-UNICAMP, Campinas, Brazil
| | - Eliana Cotta de Faria
- Department of Clinical Pathology, School of Medical Sciences, State University of Campinas-UNICAMP, Campinas, Brazil
| | - Eder Carlos Rocha Quintão
- Laboratorio de Lipides (LIM10), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
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5
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Kopylov AT, Malsagova KA, Stepanov AA, Kaysheva AL. Diversity of Plant Sterols Metabolism: The Impact on Human Health, Sport, and Accumulation of Contaminating Sterols. Nutrients 2021; 13:nu13051623. [PMID: 34066075 PMCID: PMC8150896 DOI: 10.3390/nu13051623] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 05/05/2021] [Accepted: 05/08/2021] [Indexed: 02/07/2023] Open
Abstract
The way of plant sterols transformation and their benefits for humans is still a question under the massive continuing revision. In fact, there are no receptors for binding with sterols in mammalians. However, possible biotransformation to steroids that can be catalyzed by gastro-intestinal microflora, microbial cells in prebiotics or cytochromes system were repeatedly reported. Some products of sterols metabolization are capable to imitate resident human steroids and compete with them for the binding with corresponding receptors, thus affecting endocrine balance and entire physiology condition. There are also tremendous reports about the natural origination of mammalian steroid hormones in plants and corresponding receptors for their binding. Some investigations and reports warn about anabolic effect of sterols, however, there are many researchers who are reluctant to believe in and have strong opposing arguments. We encounter plant sterols everywhere: in food, in pharmacy, in cosmetics, but still know little about their diverse properties and, hence, their exact impact on our life. Most of our knowledge is limited to their cholesterol-lowering influence and protective effect against cardiovascular disease. However, the world of plant sterols is significantly wider if we consider the thousands of publications released over the past 10 years.
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6
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Cryo-EM structure of ABCG5/G8 in complex with modulating antibodies. Commun Biol 2021; 4:526. [PMID: 33953337 PMCID: PMC8100176 DOI: 10.1038/s42003-021-02039-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 03/25/2021] [Indexed: 12/20/2022] Open
Abstract
The heterodimer of ATP-binding cassette transporter ABCG5 and ABCG8 mediates the excretion of sterols from liver and intestine, playing a critical role in cholesterol homeostasis. Here, we present the cryo-EM structure of ABCG5/G8 in complex with the Fab fragments from two monoclonal antibodies at 3.3Å resolution. The high-resolution structure reveals a unique dimer interface between the nucleotide-binding domains (NBD) of opposing transporters, consisting of an ordered network of salt bridges between the conserved NPXDFXXD motif and serving as a pivot point that may be important for the transport cycle. While mAb 11F4 increases the ATPase activity potentially by stabilization of the NBD dimer formation, mAb 2E10 inhibits ATP hydrolysis, likely by restricting the relative movement between the RecA and helical domain of ABCG8 NBD. Our study not only provides insights into the structural elements important for the transport cycle but also reveals novel epitopes for potential therapeutic interventions.
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7
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Rosam K, Monk BC, Lackner M. Sterol 14α-Demethylase Ligand-Binding Pocket-Mediated Acquired and Intrinsic Azole Resistance in Fungal Pathogens. J Fungi (Basel) 2020; 7:jof7010001. [PMID: 33374996 PMCID: PMC7822023 DOI: 10.3390/jof7010001] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 12/17/2020] [Accepted: 12/18/2020] [Indexed: 12/17/2022] Open
Abstract
The fungal cytochrome P450 enzyme sterol 14α-demethylase (SDM) is a key enzyme in the ergosterol biosynthesis pathway. The binding of azoles to the active site of SDM results in a depletion of ergosterol, the accumulation of toxic intermediates and growth inhibition. The prevalence of azole-resistant strains and fungi is increasing in both agriculture and medicine. This can lead to major yield loss during food production and therapeutic failure in medical settings. Diverse mechanisms are responsible for azole resistance. They include amino acid (AA) substitutions in SDM and overexpression of SDM and/or efflux pumps. This review considers AA affecting the ligand-binding pocket of SDMs with a primary focus on substitutions that affect interactions between the active site and the substrate and inhibitory ligands. Some of these interactions are particularly important for the binding of short-tailed azoles (e.g., voriconazole). We highlight the occurrence throughout the fungal kingdom of some key AA substitutions. Elucidation of the role of these AAs and their substitutions may assist drug design in overcoming some common forms of innate and acquired azole resistance.
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Affiliation(s)
- Katharina Rosam
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Schöpfstrasse 41, 6020 Innsbruck, Austria;
| | - Brian C. Monk
- Sir John Walsh Research Institute and Department of Oral Biology, Faculty of Dentistry, University of Otago, PO Box 56, 9054 Dunedin, New Zealand;
| | - Michaela Lackner
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Schöpfstrasse 41, 6020 Innsbruck, Austria;
- Correspondence: ; Tel.: +43-512-003-70725
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8
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Vezza T, Canet F, de Marañón AM, Bañuls C, Rocha M, Víctor VM. Phytosterols: Nutritional Health Players in the Management of Obesity and Its Related Disorders. Antioxidants (Basel) 2020; 9:antiox9121266. [PMID: 33322742 PMCID: PMC7763348 DOI: 10.3390/antiox9121266] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 12/07/2020] [Accepted: 12/09/2020] [Indexed: 02/07/2023] Open
Abstract
Obesity and its related disorders, such as diabetes and cardiovascular risk, represent an emerging global health issue. Even though genetic factors seem to be the primary actors in the development and progression of these diseases, dietary choices also appear to be of crucial importance. A healthy diet combined with physical activity have been shown to ameliorate glycaemic levels and insulin sensitivity, reduce body weight and the risk of chronic diseases, and contribute to an overall improvement in quality of life. Among nutrients, phytosterols have become the focus of growing attention as novel functional foods in the management of metabolic disorders. Phytosterols are natural plant compounds belonging to the triterpene family and are structurally similar to cholesterol. They are known for their cholesterol-lowering effects, anti-inflammatory and antioxidant properties, and the benefits they offer to the immune system. The present review aims to provide an overview of these bioactive compounds and their therapeutic potential in the fields of obesity and metabolic disorders, with special attention given to oxidative stress, inflammatory status, and gut dysbiosis, all common features of the aforementioned diseases.
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Affiliation(s)
- Teresa Vezza
- Service of Endocrinology and Nutrition, University Hospital Doctor Peset, Foundation for the Promotion of Health and Biomedical Research in the Valencian Region (FISABIO), 46017 Valencia, Spain; (T.V.); (F.C.); (A.M.d.M.)
| | - Francisco Canet
- Service of Endocrinology and Nutrition, University Hospital Doctor Peset, Foundation for the Promotion of Health and Biomedical Research in the Valencian Region (FISABIO), 46017 Valencia, Spain; (T.V.); (F.C.); (A.M.d.M.)
| | - Aranzazu M. de Marañón
- Service of Endocrinology and Nutrition, University Hospital Doctor Peset, Foundation for the Promotion of Health and Biomedical Research in the Valencian Region (FISABIO), 46017 Valencia, Spain; (T.V.); (F.C.); (A.M.d.M.)
| | - Celia Bañuls
- Service of Endocrinology and Nutrition, University Hospital Doctor Peset, Foundation for the Promotion of Health and Biomedical Research in the Valencian Region (FISABIO), 46017 Valencia, Spain; (T.V.); (F.C.); (A.M.d.M.)
- Correspondence: (C.B.); (M.R.); (V.M.V.); Tel.: +34-963-189-132 (V.M.V.); Fax: +34-961-622-492 (V.M.V.)
| | - Milagros Rocha
- Service of Endocrinology and Nutrition, University Hospital Doctor Peset, Foundation for the Promotion of Health and Biomedical Research in the Valencian Region (FISABIO), 46017 Valencia, Spain; (T.V.); (F.C.); (A.M.d.M.)
- CIBERehd, Department of Pharmacology, University of Valencia, 46010 Valencia, Spain
- Correspondence: (C.B.); (M.R.); (V.M.V.); Tel.: +34-963-189-132 (V.M.V.); Fax: +34-961-622-492 (V.M.V.)
| | - Víctor Manuel Víctor
- Service of Endocrinology and Nutrition, University Hospital Doctor Peset, Foundation for the Promotion of Health and Biomedical Research in the Valencian Region (FISABIO), 46017 Valencia, Spain; (T.V.); (F.C.); (A.M.d.M.)
- CIBERehd, Department of Pharmacology, University of Valencia, 46010 Valencia, Spain
- Department of Physiology, University of Valencia, 46010 Valencia, Spain
- Correspondence: (C.B.); (M.R.); (V.M.V.); Tel.: +34-963-189-132 (V.M.V.); Fax: +34-961-622-492 (V.M.V.)
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9
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Kanuri B, Fong V, Ponny SR, Tallman KA, Rao SR, Porter N, Fliesler SJ, Patel SB. Generation and validation of a conditional knockout mouse model for the study of the Smith-Lemli-Opitz syndrome. J Lipid Res 2020; 62:100002. [PMID: 33410752 PMCID: PMC7890206 DOI: 10.1194/jlr.ra120001101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 11/08/2020] [Accepted: 11/17/2020] [Indexed: 11/20/2022] Open
Abstract
Smith-Lemli-Opitz Syndrome (SLOS) is a developmental disorder (OMIM #270400) caused by autosomal recessive mutations in the Dhcr7 gene, which encodes the enzyme 3β-hydroxysterol-Δ7 reductase. SLOS patients present clinically with dysmorphology and neurological, behavioral, and cognitive defects, with characteristically elevated levels of 7-dehydrocholesterol (7-DHC) in all bodily tissues and fluids. Previous mouse models of SLOS have been hampered by postnatal lethality when Dhcr7 is knocked out globally, while a hypomorphic mouse model showed improvement in the biochemical phenotype with aging and did not manifest most other characteristic features of SLOS. We report the generation of a conditional knockout of Dhcr7 (Dhcr7flx/flx), validated by generating a mouse with a liver-specific deletion (Dhcr7L-KO). Phenotypic characterization of liver-specific knockout mice revealed no significant changes in viability, fertility, growth curves, liver architecture, hepatic triglyceride secretion, or parameters of systemic glucose homeostasis. Furthermore, qPCR and RNA-Seq analyses of livers revealed no perturbations in pathways responsible for cholesterol synthesis, either in male or in female Dhcr7L-KO mice, suggesting that hepatic disruption of postsqualene cholesterol synthesis leads to minimal impact on sterol metabolism in the liver. This validated conditional Dhcr7 knockout model may now allow us to systematically explore the pathophysiology of SLOS, by allowing for temporal, cell and tissue-specific loss of DHCR7.
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Affiliation(s)
- Babunageswararao Kanuri
- Division of Endocrinology, Diabetes and Metabolism, University of Cincinnati, Cincinnati, OH, USA
| | - Vincent Fong
- Division of Endocrinology, Diabetes and Metabolism, University of Cincinnati, Cincinnati, OH, USA
| | - Sithara Raju Ponny
- Division of Human Genetics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Keri A Tallman
- Department of Chemistry and Vanderbilt Institute of Chemical Biology, Vanderbilt University, Nashville, TN, USA
| | - Sriganesh Ramachandra Rao
- Departments of Ophthalmology and Biochemistry, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo-State University of New York, Buffalo, NY, USA
| | - Ned Porter
- Department of Chemistry and Vanderbilt Institute of Chemical Biology, Vanderbilt University, Nashville, TN, USA
| | - Steven J Fliesler
- Departments of Ophthalmology and Biochemistry, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo-State University of New York, Buffalo, NY, USA; Graduate Program in Neuroscience, University at Buffalo- State University of New York, Buffalo, NY, USA; Research Service, VA Western New York Healthcare System, Buffalo, NY, USA
| | - Shailendra B Patel
- Division of Endocrinology, Diabetes and Metabolism, University of Cincinnati, Cincinnati, OH, USA.
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10
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Exploring the multifocal role of phytochemicals as immunomodulators. Biomed Pharmacother 2020; 133:110959. [PMID: 33197758 DOI: 10.1016/j.biopha.2020.110959] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 10/12/2020] [Accepted: 10/27/2020] [Indexed: 02/07/2023] Open
Abstract
A well-functioning immune system of the host body plays pivotal role in the maintenance of ordinary physiological and immunological functions as well as internal environment. Balanced immunity enhances defense mechanism against infection, diseases and unwanted pathogens to avoid hypersensitivity reactions and immune related diseases. The ideal immune responses are the results of corrective interaction between the innate immune cells and acquired components of the immune system. Recently, the interest towards the immune system increased as significant target of toxicity due to exposure of chemicals, drugs and environmental pollutants. Numerous factors are involved in altering the immune responses of the host such as sex, age, stress, malnutrition, alcohol, genetic variability, life styles, environmental-pollutants and chemotherapy exposure. Immunomodulation is any modification of immune responses, often involved induction, amplification, attenuation or inhibition of immune responses. Several synthetic or traditional medicines are available in the market which promptly have many serious adverse effects and create pathogenic resistance. Phytochemicals are naturally occurring molecules, which significantly play an imperative role in modulating favorable immune responses. The present review emphasizes on the risk factors associated with alterations in immune responses, and immunomodulatory activity of phytochemicals specifically, glycosides, alkaloids, phenolic acids, flavonoids, saponins, tannins and sterols and sterolins.
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11
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Scolaro B, de Andrade LF, Castro IA. Cardiovascular Disease Prevention: The Earlier the Better? A Review of Plant Sterol Metabolism and Implications of Childhood Supplementation. Int J Mol Sci 2019; 21:ijms21010128. [PMID: 31878116 PMCID: PMC6981772 DOI: 10.3390/ijms21010128] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Revised: 08/21/2019] [Accepted: 08/24/2019] [Indexed: 11/28/2022] Open
Abstract
Atherosclerosis is the underlying cause of major cardiovascular events. The development of atherosclerotic plaques begins early in life, indicating that dietary interventions in childhood might be more effective at preventing cardiovascular disease (CVD) than treating established CVD in adulthood. Although plant sterols are considered safe and consistently effective in lowering plasma cholesterol, the health effects of early-life supplementation are unclear. Studies suggest there is an age-dependent effect on plant sterol metabolism: at a younger age, plant sterol absorption might be increased, while esterification and elimination might be decreased. Worryingly, the introduction of low-cholesterol diets in childhood may unintentionally favor a higher intake of plant sterols. Although CVD prevention should start as early as possible, more studies are needed to better elucidate the long-term effects of plant sterol accumulation and its implication on child development.
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12
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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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Mymin D, Salen G, Triggs-Raine B, Waggoner DJ, Dembinski T, Hatch GM. The natural history of phytosterolemia: Observations on its homeostasis. Atherosclerosis 2017; 269:122-128. [PMID: 29353227 DOI: 10.1016/j.atherosclerosis.2017.12.024] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 12/14/2017] [Accepted: 12/15/2017] [Indexed: 01/02/2023]
Abstract
BACKGROUND AND AIMS Phytosterolemia is a rare genetic disease caused by mutation of the ABCG5/8 gene. Our aim was to elucidate the natural history and homeostasis of phytosterolemia. METHODS We analyzed a Hutterite kindred consisting of 21 homozygotes with phytosterolemia assembled over a period of two decades, all of whom carried the ABCG8 S107X mutation and were treated with ezetimibe. RESULTS Most of these subjects were asymptomatic and devoid of clinical stigmata, and this, since they were ascertained primarily by a process of cascade testing, suggests that, relative to its true prevalence, phytosterolemia is a condition of low morbidity. All subjects have responded well to treatment with ezetimibe. Initial (pre-treatment) and post-ezetimibe levels of cholesterol and sitosterol were measured and percentage changes on ezetimibe were calculated. We found initial levels to be inversely related to subjects' ages as were percentage responses to ezetimibe therapy. There was also a direct correlation between initial levels and percentage responses to ezetimibe. Hence on-treatment levels were very uniform. CONCLUSIONS This evidence of a link with age leads us to propose that an age-related change in cholesterol and sterol homeostasis occurs at puberty in phytosterolemia and that the change is due to high sterol and/or stanol levels causing feedback inhibition of sterol regulatory element-binding protein (SREBP-2) processing. This would explain the well-documented phenomenon of depressed cholesterol synthesis in phytosterolemia. It is also well-known that LDL-receptor activity is increased, and this feasibly explains reduced LDL levels and consequent reduction of plasma cholesterol and sitosterol levels. Downregulated SREBP-2 processing would be expected to also lower proprotein convertase subtilisin/kexin type 9 (PCSK9) levels and this would explain high LDL-receptor activity. The above state could be termed disrupted homeostasis and the alternative, seen mostly in children and characterized by hypercholesterolemia and hypersterolemia, simple homeostasis.
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Affiliation(s)
- David Mymin
- Department of Internal Medicine, University of Manitoba, Winnipeg, Manitoba, Canada, R3E3P4; Center for Research and Treatment of Atherosclerosis, University of Manitoba, Winnipeg, Manitoba, Canada, R3E3P4.
| | - Gerald Salen
- Rutgers New Jersey Medical School, Newark, NJ, USA
| | - Barbara Triggs-Raine
- Department of Biochemistry and Medical Genetics, University of Manitoba, Chicago, IL, USA
| | - Darrel J Waggoner
- Department of Human Genetics, University of Chicago, Chicago, IL, USA
| | - Thomas Dembinski
- Department of Clinical Biochemistry, University of Manitoba, Winnipeg, Manitoba, Canada, R3E3P4
| | - Grant M Hatch
- Center for Research and Treatment of Atherosclerosis, University of Manitoba, Winnipeg, Manitoba, Canada, R3E3P4; Department of Pharmacology and Therapeutics, University of Manitoba, Winnipeg, Manitoba, Canada, R3E3P4
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Pannico A, Cirillo C, Giaccone M, Scognamiglio P, Romano R, Caporaso N, Sacchi R, Basile B. Fruit position within the canopy affects kernel lipid composition of hazelnuts. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2017; 97:4790-4799. [PMID: 28374458 DOI: 10.1002/jsfa.8348] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Revised: 03/28/2017] [Accepted: 03/29/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND The aim of this research was to study the variability in kernel composition within the canopy of hazelnut trees. RESULTS Kernel fresh and dry weight increased linearly with fruit height above the ground. Fat content decreased, while protein and ash content increased, from the bottom to the top layers of the canopy. The level of unsaturation of fatty acids decreased from the bottom to the top of the canopy. Thus, the kernels located in the bottom layers of the canopy appear to be more interesting from a nutritional point of view, but their lipids may be more exposed to oxidation. The content of different phytosterols increased progressively from bottom to top canopy layers. CONCLUSION Most of these effects correlated with the pattern in light distribution inside the canopy. The results of this study indicate that fruit position within the canopy is an important factor in determining hazelnut kernel growth and composition. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Antonio Pannico
- Department of Agricultural Sciences, University of Naples Federico II, Portici, Naples, Italy
| | - Chiara Cirillo
- Department of Agricultural Sciences, University of Naples Federico II, Portici, Naples, Italy
| | - Matteo Giaccone
- Department of Agricultural Sciences, University of Naples Federico II, Portici, Naples, Italy
| | - Pasquale Scognamiglio
- Department of Agricultural Sciences, University of Naples Federico II, Portici, Naples, Italy
| | - Raffaele Romano
- Department of Agricultural Sciences, University of Naples Federico II, Portici, Naples, Italy
| | - Nicola Caporaso
- Department of Agricultural Sciences, University of Naples Federico II, Portici, Naples, Italy
| | - Raffaele Sacchi
- Department of Agricultural Sciences, University of Naples Federico II, Portici, Naples, Italy
| | - Boris Basile
- Department of Agricultural Sciences, University of Naples Federico II, Portici, Naples, Italy
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Kübeck R, Bonet-Ripoll C, Hoffmann C, Walker A, Müller VM, Schüppel VL, Lagkouvardos I, Scholz B, Engel KH, Daniel H, Schmitt-Kopplin P, Haller D, Clavel T, Klingenspor M. Dietary fat and gut microbiota interactions determine diet-induced obesity in mice. Mol Metab 2016; 5:1162-1174. [PMID: 27900259 PMCID: PMC5123202 DOI: 10.1016/j.molmet.2016.10.001] [Citation(s) in RCA: 132] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 09/26/2016] [Accepted: 10/04/2016] [Indexed: 12/19/2022] Open
Abstract
Objective Gut microbiota may promote positive energy balance; however, germfree mice can be either resistant or susceptible to diet-induced obesity (DIO) depending on the type of dietary intervention. We here sought to identify the dietary constituents that determine the susceptibility to body fat accretion in germfree (GF) mice. Methods GF and specific pathogen free (SPF) male C57BL/6N mice were fed high-fat diets either based on lard or palm oil for 4 wks. Mice were metabolically characterized at the end of the feeding trial. FT-ICR-MS and UPLC-TOF-MS were used for cecal as well as hepatic metabolite profiling and cecal bile acids quantification, respectively. Hepatic gene expression was examined by qRT-PCR and cecal gut microbiota of SPF mice was analyzed by high-throughput 16S rRNA gene sequencing. Results GF mice, but not SPF mice, were completely DIO resistant when fed a cholesterol-rich lard-based high-fat diet, whereas on a cholesterol-free palm oil-based high-fat diet, DIO was independent of gut microbiota. In GF lard-fed mice, DIO resistance was conveyed by increased energy expenditure, preferential carbohydrate oxidation, and increased fecal fat and energy excretion. Cecal metabolite profiling revealed a shift in bile acid and steroid metabolites in these lean mice, with a significant rise in 17β-estradiol, which is known to stimulate energy expenditure and interfere with bile acid metabolism. Decreased cecal bile acid levels were associated with decreased hepatic expression of genes involved in bile acid synthesis. These metabolic adaptations were largely attenuated in GF mice fed the palm-oil based high-fat diet. We propose that an interaction of gut microbiota and cholesterol metabolism is essential for fat accretion in normal SPF mice fed cholesterol-rich lard as the main dietary fat source. This is supported by a positive correlation between bile acid levels and specific bacteria of the order Clostridiales (phylum Firmicutes) as a characteristic feature of normal SPF mice fed lard. Conclusions In conclusion, our study identified dietary cholesterol as a candidate ingredient affecting the crosstalk between gut microbiota and host metabolism. Cholesterol-based but not plant sterol-based high-fat diet protects germfree (GF) mice from diet-induced obesity (DIO). DIO resistant GF mice show preferential carbohydrate oxidation, higher energy expenditure and energy and fat excretion. DIO resistance in GF mice is accompanied by increased steroid hormone levels but decreased bile acid levels in the cecum. Substrate oxidation and fat excretion in DIO resistant GF mice is linked to decreased hepatic Cyp7a1 and Nr1h4 expression.
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Key Words
- ANOVA, analysis of variance
- Abcg5, ATP-binding cassette sub-family G member 5
- Abcg8, ATP-binding cassette sub-family G member 8
- Actb, beta actin
- Akr1d1, aldo-keto-reductase family member 1
- BMR, basal metabolic rate
- CA, cholic acid
- CD, control diet
- CDCA, chenodeoxycholic acid
- CIDEA, cell death inducing DFFA-like effector
- COX4, cytochrome c oxidase subunit 4
- Cyp27a1, cholesterol 27 alpha-hydroxylase
- Cyp7a1, cholesterol 7 alpha-hydroxylase
- DCA, deoxycholic acid
- DEE, daily energy expenditure
- DIO, diet-induced obesity
- Dhcr7, 7-dehydrocholesterol reductase
- Diet-induced obesity resistance
- Eef2, eukaryotic elongation factor 2
- Energy balance
- FT-ICR-MS, Fourier transform-Ion Cyclotron Resonance-Mass Spectrometry
- FT-IR, Fourier transform-infrared spectroscopy
- GF, germfree
- GUSB, beta-glucuronidase
- Germfree
- HDCA, hyodeoxycholic acid
- HP, heat production
- High-fat diet
- Hmgcr, 3-hydroxy-3-methylglutaryl Coenzyme A reductase
- Hmgcs, 3-hydroxy-3-methylglutaryl Coenzyme A synthase 1
- Hprt1, hypoxanthine guanine phosphoribosyl transferase
- Hsd11b1, hydroxysteroid (11-β) dehydrogenase 1
- Hsp90, heat shock protein 90
- LHFD, high-fat diet based on lard
- Ldlr, low density lipoprotein receptor
- MCA, muricholic acid
- Nr1h2, nuclear receptor subfamily 1, group H, member 2 (liver X receptor β)
- Nr1h3, nuclear receptor subfamily 1, group H, member 3 (liver X receptor α)
- Nr1h4, nuclear receptor subfamily 1, group H, member 4 (farnesoid X receptor α)
- PHFD, high-fat diet based on palm oil
- PRDM16, PR domain containing 16
- SPF, specific pathogen free
- Srebf1, sterol regulatory element binding transcription factor 1
- TCA, taurocholic acid
- TMCA, Tauromuricholic acid
- Tf2b, transcription factor II B
- UCP1, uncoupling protein 1
- UDCA, ursodeoxycholic acid
- UPLC-TOF-MS, ultraperformance liquid chromatography-time of flight-mass spectrometry
- qPCR, quantitative real-time polymerase chain reaction
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Affiliation(s)
- Raphaela Kübeck
- ZIEL - Institute for Food and Health, Technical University of Munich, Gregor-Mendel-Str. 2, 85354 Freising, Germany; Chair of Molecular Nutritional Medicine, Technical University of Munich, TUM School of Life Sciences Weihenstephan, EKFZ - Else Kröner-Fresenius-Center for Nutritional Medicine, Gregor-Mendel-Str. 2, 85354 Freising, Germany
| | - Catalina Bonet-Ripoll
- ZIEL - Institute for Food and Health, Technical University of Munich, Gregor-Mendel-Str. 2, 85354 Freising, Germany; Chair of Molecular Nutritional Medicine, Technical University of Munich, TUM School of Life Sciences Weihenstephan, EKFZ - Else Kröner-Fresenius-Center for Nutritional Medicine, Gregor-Mendel-Str. 2, 85354 Freising, Germany
| | - Christina Hoffmann
- ZIEL - Institute for Food and Health, Technical University of Munich, Gregor-Mendel-Str. 2, 85354 Freising, Germany; Chair of Molecular Nutritional Medicine, Technical University of Munich, TUM School of Life Sciences Weihenstephan, EKFZ - Else Kröner-Fresenius-Center for Nutritional Medicine, Gregor-Mendel-Str. 2, 85354 Freising, Germany
| | - Alesia Walker
- Research Unit Analytical BioGeoChemistry, Department of Environmental Sciences, Helmholtz Zentrum München, Ingolstädter Landstr.1, 85764 Neuherberg, Germany
| | - Veronika Maria Müller
- ZIEL - Institute for Food and Health, Technical University of Munich, Gregor-Mendel-Str. 2, 85354 Freising, Germany; Chair of Nutritional Physiology, Technical University of Munich, TUM School of Life Sciences Weihenstephan, Gregor-Mendel-Str. 2, 85354 Freising, Germany
| | - Valentina Luise Schüppel
- ZIEL - Institute for Food and Health, Technical University of Munich, Gregor-Mendel-Str. 2, 85354 Freising, Germany; Chair of Nutrition and Immunology, Technical University of Munich, TUM School of Life Sciences Weihenstephan, Maximus-von-Imhof-Forum 2, 85354 Freising, Germany
| | - Ilias Lagkouvardos
- ZIEL - Institute for Food and Health, Technical University of Munich, Gregor-Mendel-Str. 2, 85354 Freising, Germany
| | - Birgit Scholz
- Chair of General Food Technology, Technische Universität München, Alte Akademie 10, 85354 Freising, Germany
| | - Karl-Heinz Engel
- Chair of General Food Technology, Technische Universität München, Alte Akademie 10, 85354 Freising, Germany
| | - Hannelore Daniel
- Chair of Nutritional Physiology, Technical University of Munich, TUM School of Life Sciences Weihenstephan, Gregor-Mendel-Str. 2, 85354 Freising, Germany
| | - Philippe Schmitt-Kopplin
- ZIEL - Institute for Food and Health, Technical University of Munich, Gregor-Mendel-Str. 2, 85354 Freising, Germany; Research Unit Analytical BioGeoChemistry, Department of Environmental Sciences, Helmholtz Zentrum München, Ingolstädter Landstr.1, 85764 Neuherberg, Germany; Chair of Analytical Food Chemistry, Technische Universität München, Alte Akademie 10, 85354 Freising, Germany
| | - Dirk Haller
- ZIEL - Institute for Food and Health, Technical University of Munich, Gregor-Mendel-Str. 2, 85354 Freising, Germany; Chair of Nutrition and Immunology, Technical University of Munich, TUM School of Life Sciences Weihenstephan, Maximus-von-Imhof-Forum 2, 85354 Freising, Germany
| | - Thomas Clavel
- ZIEL - Institute for Food and Health, Technical University of Munich, Gregor-Mendel-Str. 2, 85354 Freising, Germany
| | - Martin Klingenspor
- ZIEL - Institute for Food and Health, Technical University of Munich, Gregor-Mendel-Str. 2, 85354 Freising, Germany; Chair of Molecular Nutritional Medicine, Technical University of Munich, TUM School of Life Sciences Weihenstephan, EKFZ - Else Kröner-Fresenius-Center for Nutritional Medicine, Gregor-Mendel-Str. 2, 85354 Freising, Germany.
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Torres-Jiménez AR, Solís-Vallejo E, Sanchez-Jara B, Cespedes-Cruz AI, Zeferino-Cruz M. Xanthomas and macrothrombocytopenia: Sitosterolaemia is the answer. REUMATOLOGIA CLINICA 2016; 12:164-166. [PMID: 26394530 DOI: 10.1016/j.reuma.2015.07.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Revised: 06/22/2015] [Accepted: 07/03/2015] [Indexed: 06/05/2023]
Affiliation(s)
| | - Eunice Solís-Vallejo
- Reumatología Pediátrica, Hospital General Centro Médico Nacional la Raza, México, D.F., México
| | - Berenice Sanchez-Jara
- Hematología Pediátrica, Hospital General Centro Médico Nacional la Raza, México, D.F., México
| | | | - Maritza Zeferino-Cruz
- Reumatología Pediátrica, Hospital General Centro Médico Nacional la Raza, México, D.F., México
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Niesor EJ. Will Lipidation of ApoA1 through Interaction with ABCA1 at the Intestinal Level Affect the Protective Functions of HDL? BIOLOGY 2015; 4:17-38. [PMID: 25569858 PMCID: PMC4381214 DOI: 10.3390/biology4010017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Accepted: 12/18/2014] [Indexed: 11/16/2022]
Abstract
The relationship between levels of high-density lipoprotein cholesterol (HDL-C) and cardiovascular (CV) risk is well recognized; however, in recent years, large-scale phase III studies with HDL-C-raising or -mimicking agents have failed to demonstrate a clinical benefit on CV outcomes associated with raising HDL-C, casting doubt on the "HDL hypothesis." This article reviews potential reasons for the observed negative findings with these pharmaceutical compounds, focusing on the paucity of translational models and relevant biomarkers related to HDL metabolism that may have confounded understanding of in vivo mechanisms. A unique function of HDL is its ability to interact with the ATP-binding cassette transporter (ABC) A1 via apolipoprotein (Apo) A1. Only recently, studies have shown that this process may be involved in the intestinal uptake of dietary sterols and antioxidants (vitamin E, lutein and zeaxanthin) at the basolateral surface of enterocytes. This parameter should be assessed for HDL-raising drugs in addition to the more documented reverse cholesterol transport (RCT) from peripheral tissues to the liver. Indeed, a single mechanism involving the same interaction between ApoA1 and ABCA1 may encompass two HDL functions previously considered as separate: antioxidant through the intestinal uptake of antioxidants and RCT through cholesterol efflux from loaded cells such as macrophages.
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Affiliation(s)
- Eric J Niesor
- F. Hoffmann-La Roche Ltd., Grenzacherstrasse 124, CH-4070 Basel, Switzerland.
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El Kharrassi Y, Samadi M, Lopez T, Nury T, El Kebbaj R, Andreoletti P, El Hajj HI, Vamecq J, Moustaid K, Latruffe N, El Kebbaj MS, Masson D, Lizard G, Nasser B, Cherkaoui-Malki M. Biological activities of Schottenol and Spinasterol, two natural phytosterols present in argan oil and in cactus pear seed oil, on murine miroglial BV2 cells. Biochem Biophys Res Commun 2014; 446:798-804. [PMID: 24582563 DOI: 10.1016/j.bbrc.2014.02.074] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Accepted: 02/18/2014] [Indexed: 12/17/2022]
Abstract
The objective of this study was to evaluate the biological activities of the major phytosterols present in argan oil (AO) and in cactus seed oil (CSO) in BV2 microglial cells. Accordingly, we first determined the sterol composition of AO and CSO, showing the presence of Schottenol and Spinasterol as major sterols in AO. While in CSO, in addition to these two sterols, we found mainly another sterol, the Sitosterol. The chemical synthesis of Schottenol and Spinasterol was performed. Our results showed that these two phytosterols, as well as sterol extracts from AO or CSO, are not toxic to microglial BV2 cells. However, treatments by these phytosterols impact the mitochondrial membrane potential. Furthermore, both Schottenol and Spinasterol can modulate the gene expression of two nuclear receptors, liver X receptor (LXR)-α and LXRβ, their target genes ABCA1 and ABCG1. Nonetheless, only Schottenol exhibited a differential activation vis-à-vis the nuclear receptor LXRβ. Thus Schottenol and Spinasterol can be considered as new LXR agonists, which may play protective roles by the modulation of cholesterol metabolism.
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Affiliation(s)
- Youssef El Kharrassi
- Université de Bourgogne, Laboratoire Bio-PeroxIL, EA7270, Dijon F-21000, France; Laboratoire de Biochimie et Neurosciences, Faculté des Sciences et Techniques, Université Hassan I, BP 577, 26000 Settat, Morocco
| | - Mohammad Samadi
- LCPMC-A2, ICPM, Department of Chemistry, Université de Lorraine, Metz, France
| | | | - Thomas Nury
- Université de Bourgogne, Laboratoire Bio-PeroxIL, EA7270, Dijon F-21000, France
| | - Riad El Kebbaj
- Université de Bourgogne, Laboratoire Bio-PeroxIL, EA7270, Dijon F-21000, France; Laboratoire de Biochimie et Neurosciences, Faculté des Sciences et Techniques, Université Hassan I, BP 577, 26000 Settat, Morocco
| | - Pierre Andreoletti
- Université de Bourgogne, Laboratoire Bio-PeroxIL, EA7270, Dijon F-21000, France
| | - Hammam I El Hajj
- Université de Bourgogne, Laboratoire Bio-PeroxIL, EA7270, Dijon F-21000, France
| | - Joseph Vamecq
- INSERM and HMNO, CBP, CHRU Lille, 59037 Lille, France
| | - Khadija Moustaid
- Laboratoire de Biochimie et Neurosciences, Faculté des Sciences et Techniques, Université Hassan I, BP 577, 26000 Settat, Morocco
| | - Norbert Latruffe
- Université de Bourgogne, Laboratoire Bio-PeroxIL, EA7270, Dijon F-21000, France
| | - M'Hammed Saïd El Kebbaj
- Laboratoire de recherche sur les Lipoprotéines et l'Athérosclérose, Faculté des Sciences Ben M'sik, Avenue Cdt Driss El Harti BP. 7955, Université Hassan II-Mohammedia-Casablanca, Morocco
| | | | - Gérard Lizard
- Université de Bourgogne, Laboratoire Bio-PeroxIL, EA7270, Dijon F-21000, France
| | - Boubker Nasser
- Laboratoire de Biochimie et Neurosciences, Faculté des Sciences et Techniques, Université Hassan I, BP 577, 26000 Settat, Morocco
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Platelet hyperreactivity explains the bleeding abnormality and macrothrombocytopenia in a murine model of sitosterolemia. Blood 2013; 122:2732-42. [PMID: 23926302 DOI: 10.1182/blood-2013-06-510461] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Sitosterolemia is a rare, autosomal recessive disease caused by mutations in the adenosine triphosphate-binding cassette transporter genes ABCG5 or ABCG8 that result in accumulation of xenosterols in the body. Clinical manifestations include tendon xanthomas, premature coronary artery disease, hemolytic anemia, macrothrombocytopenia, and bleeding. Although the effect of sterol accumulation on the predisposition for atherosclerosis is evident, how xenosterol accumulation leads to defects in platelet physiology is unknown. Sitosterolemia induced in Abcg5- and Abcg8-deficient mice fed a high plant sterol diet resulted in accumulation of free sterols in platelet plasma membranes, leading to hyperactivatable platelets characterized by constitutive binding of fibrinogen to its αIIbβ3 integrin receptor, internalization of the αIIbβ3 complex, generation of platelet-derived microparticles, and changes in the quantity and subcellular localization of filamin. The latter was associated with macrothrombocytopenia, shedding of GPIbα, impaired platelet adhesion to von Willebrand factor, and inability to form stable thrombi. Plasma levels of soluble GPIbα were strongly correlated with plasma sitosterol levels in samples from human sitosterolemic patients, implicating a similar mechanism of sterol-induced platelet passivation in the human disease. Intercalation of plant sterols into the plasma membrane therefore results in dysregulation of multiple platelet activation pathways, leading to macrothrombocytopenia and bleeding.
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Effect of nitrogen fertilisation rates on the content of fatty acids, sterols, tocopherols and phenolic compounds, and on the oxidative stability of walnuts. Lebensm Wiss Technol 2013. [DOI: 10.1016/j.lwt.2012.07.018] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Lottenberg AM, Bombo RP, Ilha A, Nunes VS, Nakandakare ER, Quintão EC. Do clinical and experimental investigations support an antiatherogenic role for dietary phytosterols/stanols? IUBMB Life 2012; 64:296-306. [DOI: 10.1002/iub.1006] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2011] [Accepted: 12/31/2011] [Indexed: 11/12/2022]
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Phytosterols, phytostanols and their esters: from natural to functional foods. MEDITERRANEAN JOURNAL OF NUTRITION AND METABOLISM 2011. [DOI: 10.1007/s12349-010-0049-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Abela GS. Role of cholesterol crystals in myocardial infarction and stroke. ACTA ACUST UNITED AC 2010. [DOI: 10.2217/clp.09.79] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Sanclemente T, Marques-Lopes I, Puzo J, García-Otín AL. Role of naturally-occurring plant sterols on intestinal cholesterol absorption and plasmatic levels. J Physiol Biochem 2009; 65:87-98. [PMID: 19588734 DOI: 10.1007/bf03165972] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Cardiovascular disease is a major health problem in developed countries although its incidence is relatively lower in Mediterranean countries which is partly ascribed to dietary habits. Epidemiologic evidence shows that elevated serum cholesterol, specifically low-density lipoprotein cholesterol (c-LDL), increases cardiovascular disease. Phytosterols are bioactive compounds, found in all vegetable foods, which inhibit intestinal cholesterol absorption and, therefore, have a serum cholesterol-lowering effect. Intestinal cholesterol absorption is a multistep process where plant sterols and stanols may act: a) attenuating the NPC1L1 gene expression, which may result in a lower cholesterol uptake from the lumen; b) lowering the cholesterol esterification rate by the ACAT2 (acyl-CoA cholesterol acyltransferase) and, consequently, the amount of cholesterol secreted via the chylomicrons and c) upregulating the expression of ABC-transporters ABCG5 and ABCG8 in intestinal cells, which may result in an increased excretion of cholesterol by the enterocyte back into the lumen. Many clinical trials proved that commercial products enriched with phytosterols reduce cholesterol levels. Likewise, recent studies show that phytosterols present in natural food matrices are also effective and could be an important component of cardioprotective dietary patterns such as the Mediterranean diet.
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Affiliation(s)
- T Sanclemente
- Faculty of Health Sciences and Sports, University of Zaragoza, Huesca, Spain
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Goldstein MR, Mascitelli L, Pezzetta F. Point: Statins, plant sterol absorption, and increased coronary risk. J Clin Lipidol 2008; 2:304-5. [DOI: 10.1016/j.jacl.2008.06.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2008] [Revised: 05/02/2008] [Accepted: 06/08/2008] [Indexed: 11/26/2022]
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