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Tzounakas VL, Kriebardis AG, Papassideri IS, Antonelou MH. Donor-variation effect on red blood cell storage lesion: A close relationship emerges. Proteomics Clin Appl 2016; 10:791-804. [PMID: 27095294 DOI: 10.1002/prca.201500128] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Revised: 03/24/2016] [Accepted: 04/11/2016] [Indexed: 12/20/2022]
Abstract
Although the molecular pathways leading to the progressive deterioration of stored red blood cells (RBC storage lesion) and the clinical relevance of storage-induced changes remain uncertain, substantial donor-specific variability in RBC performance during storage, and posttransfusion has been established ("donor-variation effect"). In-bag hemolysis and numerous properties of the RBC units that may affect transfusion efficacy have proved to be strongly donor-specific. Donor-variation effect may lead to the production of highly unequal blood labile products even when similar storage strategy and duration are applied. Genetic, undiagnosed/subclinical medical conditions and lifestyle factors that affect RBC characteristics at baseline, including RBC lifespan, energy metabolism, and sensitivity to oxidative stress, are all likely to influence the storage capacity of individual donors' cells, although not evident by the donor's health or hematological status at blood donation. Consequently, baseline characteristics of the donors, such as membrane peroxiredoxin-2 and serum uric acid concentration, have been proposed as candidate biomarkers of storage quality. This review article focuses on specific factors that might contribute to the donor-variation effect and emphasizes the emerging need for using omics-based technologies in association with in vitro and in vivo transfusion models and clinical trials to discover biomarkers of storage quality and posttransfusion recovery in donor blood.
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Affiliation(s)
- Vassilis L Tzounakas
- Department of Cell Biology and Biophysics, Faculty of Biology, NKUA, Athens, Greece
| | - Anastasios G Kriebardis
- Department of Medical Laboratories, Faculty of Health and Caring Professions, Technological and Educational Institute of Athens, Greece
| | | | - Marianna H Antonelou
- Department of Cell Biology and Biophysics, Faculty of Biology, NKUA, Athens, Greece
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52
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Stark KD, Van Elswyk ME, Higgins MR, Weatherford CA, Salem N. Global survey of the omega-3 fatty acids, docosahexaenoic acid and eicosapentaenoic acid in the blood stream of healthy adults. Prog Lipid Res 2016; 63:132-52. [PMID: 27216485 DOI: 10.1016/j.plipres.2016.05.001] [Citation(s) in RCA: 341] [Impact Index Per Article: 42.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 05/14/2016] [Accepted: 05/18/2016] [Indexed: 02/05/2023]
Abstract
Studies reporting blood levels of the omega-3 polyunsaturated fatty acids, eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), were systematically identified in order to create a global map identifying countries and regions with different blood levels. Included studies were those of healthy adults, published in 1980 or later. A total of 298 studies met all inclusion criteria. Studies reported fatty acids in various blood fractions including plasma total lipids (33%), plasma phospholipid (32%), erythrocytes (32%) and whole blood (3.0%). Fatty acid data from each blood fraction were converted to relative weight percentages (wt.%) and then assigned to one of four discrete ranges (high, moderate, low, very low) corresponding to wt.% EPA+DHA in erythrocyte equivalents. Regions with high EPA+DHA blood levels (>8%) included the Sea of Japan, Scandinavia, and areas with indigenous populations or populations not fully adapted to Westernized food habits. Very low blood levels (≤4%) were observed in North America, Central and South America, Europe, the Middle East, Southeast Asia, and Africa. The present review reveals considerable variability in blood levels of EPA+DHA and the very low to low range of blood EPA+DHA for most of the world may increase global risk for chronic disease.
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Affiliation(s)
- Ken D Stark
- University of Waterloo, Department of Kinesiology, 200 University Avenue, Waterloo, ON, N2L 3G1, Canada.
| | - Mary E Van Elswyk
- Scientific Affairs, Van Elswyk Consulting, Inc., 10350 Macedonia St., Longmont, CO 80503, USA.
| | - M Roberta Higgins
- MEDetect Clinical Information Associates, Inc., PO Box 152, Skippack, PA 19474, USA.
| | | | - Norman Salem
- DSM Nutritional Products Ltd., 6480 Dobbin Road, Columbia, MD 21045, USA.
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53
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Yang Z, Wi Y, Yoon YM, Verwilst P, Jang JH, Kim TW, Kang C, Kim JS. BODIPY/Nile-Red-Based Efficient FRET Pair: Selective Assay of Endoplasmic Reticulum Membrane Fluidity. Chem Asian J 2015; 11:527-31. [PMID: 26537552 DOI: 10.1002/asia.201501060] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Revised: 10/31/2015] [Indexed: 12/26/2022]
Affiliation(s)
- Zhigang Yang
- Department of Chemistry; Korea University; Seoul 136-701 Korea
- Key Laboratory of optoelectronic devices and systems of ministry of education and Guangdong province, College of optoelectronic engineering; Shenzhen University; Shenzhen 518060 China
| | - Youngjin Wi
- The School of East-West Medical Science; Kyung Hee University; Yongin 446-701 Korea
| | - Young-Min Yoon
- The School of East-West Medical Science; Kyung Hee University; Yongin 446-701 Korea
| | - Peter Verwilst
- Department of Chemistry; Korea University; Seoul 136-701 Korea
| | - Joo Hee Jang
- Department of Chemistry; Korea University; Seoul 136-701 Korea
| | - Tae Woo Kim
- The School of East-West Medical Science; Kyung Hee University; Yongin 446-701 Korea
| | - Chulhun Kang
- The School of East-West Medical Science; Kyung Hee University; Yongin 446-701 Korea
| | - Jong Seung Kim
- Department of Chemistry; Korea University; Seoul 136-701 Korea
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Tsuda K. Association of resistin with impaired membrane fluidity of red blood cells in hypertensive and normotensive men: an electron paramagnetic resonance study. Heart Vessels 2015; 31:1724-30. [DOI: 10.1007/s00380-015-0755-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2015] [Accepted: 09/25/2015] [Indexed: 10/23/2022]
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Metabolomic and Lipidomic Analysis of Serum Samples following Curcuma longa Extract Supplementation in High-Fructose and Saturated Fat Fed Rats. PLoS One 2015; 10:e0135948. [PMID: 26288372 PMCID: PMC4545834 DOI: 10.1371/journal.pone.0135948] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Accepted: 07/29/2015] [Indexed: 01/11/2023] Open
Abstract
We explored, using nuclear magnetic resonance (NMR) metabolomics and fatty acids profiling, the effects of a common nutritional complement, Curcuma longa, at a nutritionally relevant dose with human use, administered in conjunction with an unbalanced diet. Indeed, traditional food supplements have been long used to counter metabolic impairments induced by unbalanced diets. Here, rats were fed either a standard diet, a high level of fructose and saturated fatty acid (HFS) diet, a diet common to western countries and that certainly contributes to the epidemic of insulin resistance (IR) syndrome, or a HFS diet with a Curcuma longa extract (1% of curcuminoids in the extract) for ten weeks. Orthogonal projections to latent structures discriminant analysis (OPLS-DA) on the serum NMR profiles and fatty acid composition (determined by GC/MS) showed a clear discrimination between HFS groups and controls. This discrimination involved metabolites such as glucose, amino acids, pyruvate, creatine, phosphocholine/glycerophosphocholine, ketone bodies and glycoproteins as well as an increase of monounsaturated fatty acids (MUFAs) and a decrease of n-6 and n-3 polyunsaturated fatty acids (PUFAs). Although the administration of Curcuma longa did not prevent the observed increase of glucose, triglycerides, cholesterol and insulin levels, discriminating metabolites were observed between groups fed HFS alone or with addition of a Curcuma longa extract, namely some MUFA and n-3 PUFA, glycoproteins, glutamine, and methanol, suggesting that curcuminoids may act respectively on the fatty acid metabolism, the hexosamine biosynthesis pathway and alcohol oxidation. Curcuma longa extract supplementation appears to be beneficial in these metabolic pathways in rats. This metabolomic approach highlights important serum metabolites that could help in understanding further the metabolic mechanisms leading to IR.
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56
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Fekete K, Györei E, Lohner S, Verduci E, Agostoni C, Decsi T. Long-chain polyunsaturated fatty acid status in obesity: a systematic review and meta-analysis. Obes Rev 2015; 16:488-97. [PMID: 25828602 DOI: 10.1111/obr.12280] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2014] [Revised: 02/11/2015] [Accepted: 02/25/2015] [Indexed: 01/13/2023]
Abstract
Long-chain polyunsaturated fatty acid (LCPUFA) status has recently been related to the pathogenesis of obesity. Our aims were to systematically review observational studies investigating LCPUFA status from different blood compartments in overweight or obese subjects and to assess the relationship between LCPUFA profile and obesity. The Ovid MEDLINE, Scopus and Cochrane Library CENTRAL databases were searched from inception to January 2014. The meta-analysis showed significant differences in the LCPUFA composition of total plasma lipids, plasma phospholipids and plasma cholesteryl esters between overweight or obese subjects and controls. Dihomo-γ-linolenic acid (DGLA) values were significantly higher in overweight or obese subjects compared with controls in all the investigated biomarkers. In addition, the DGLA/linoleic acid ratio (surrogate parameter for Δ6 desaturase activity) in plasma phospholipids was significantly elevated (mean difference [MD]: 0.05; 95% confidence interval [CI]: 0.02, 0.08; n = 280), while the arachidonic acid/DGLA ratio (surrogate parameter for Δ5 desaturase activity) was significantly decreased (MD: -0.55; 95% CI: -0.71, -0.39; n = 347) in overweight or obese subjects compared with controls. The results of the present meta-analysis confirm that LCPUFA profile is altered in obesity and suggest that the differences observed in desaturase activities may be responsible for the disturbed LCPUFA metabolism in obesity.
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Affiliation(s)
- K Fekete
- Department of Biochemistry and Medical Chemistry, University of Pécs, Pécs, Hungary.,Department of Paediatrics, University of Pécs, Pécs, Hungary
| | - E Györei
- Department of Paediatrics, University of Pécs, Pécs, Hungary
| | - S Lohner
- Department of Paediatrics, University of Pécs, Pécs, Hungary.,Hungarian Branch of the German Cochrane Centre, University of Pécs, Pécs, Hungary
| | - E Verduci
- Department of Paediatrics, San Paolo Hospital, University of Milan, Milan, Italy
| | - C Agostoni
- Department of Paediatrics, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy
| | - T Decsi
- Department of Paediatrics, University of Pécs, Pécs, Hungary
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Effects of glucomannan-enriched, aronia juice-based supplement on cellular antioxidant enzymes and membrane lipid status in subjects with abdominal obesity. ScientificWorldJournal 2014; 2014:869250. [PMID: 25574495 PMCID: PMC4276299 DOI: 10.1155/2014/869250] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Accepted: 11/26/2014] [Indexed: 01/09/2023] Open
Abstract
The aim of this study was to analyze the effects of a 4-week-long consumption of glucomannan-enriched, aronia juice-based supplement on anthropometric parameters, membrane fatty acid profile, and status of antioxidant enzymes in erythrocytes obtained from postmenopausal women with abdominal obesity. Twenty women aged 45–65 with a mean body mass index (BMI) of 36.1 ± 4.4 kg/m2 and waist circumference of 104.8 ± 10.1 cm were enrolled. Participants were instructed to consume 100 mL of supplement per day as part of their regular diet. A significant increase in the content of n-3 (P < 0.05) polyunsaturated fatty acids in membrane phospholipids was observed, with a marked increase in the level of docosahexaenoic fatty acid (P < 0.05). Accordingly, a decrease in the n-6 and n-3 fatty acids ratio was observed (P < 0.05). The observed effects were accompanied with an increase in glutathione peroxidase activity (P < 0.05). Values for BMI (P < 0.001), waist circumference (P < 0.001), and systolic blood pressure (P < 0.05) were significantly lower after the intervention. The obtained results indicate a positive impact of tested supplement on cellular oxidative damage, blood pressure, and anthropometric indices of obesity.
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Omega-3 index levels and associated factors in a middle-aged French population: the MONA LISA-NUT Study. Eur J Clin Nutr 2014; 69:436-41. [PMID: 25335443 DOI: 10.1038/ejcn.2014.219] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2014] [Revised: 08/23/2014] [Accepted: 09/03/2014] [Indexed: 11/08/2022]
Abstract
BACKGROUND/OBJECTIVES The omega-3 index (the summed percentage content of eicosapentaenoic and docosahexaenoic acids in red blood cells) is associated with a lower risk of fatal coronary heart disease and sudden cardiac death. We aimed to determine which socio-demographic, behavioural or clinical factors are independently associated with the omega-3 index and the extent to which seafood consumption mediates the index's association with socio-economic status (SES). SUBJECTS/METHODS As part of the cross-sectional MONA LISA-NUT survey (2005-2007), gas chromatography was used to analyse the red blood cell fatty acid composition in 503 French subjects aged 35-64 years. Dietary data were collected by trained dieticians via a validated food frequency questionnaire and a prospective 3-day food record. Risk factors were estimated with standardised measurements and questionnaires. SES was assessed through the self-reported educational and income tax levels. RESULTS The mean ± s.d. omega-3 index was 6.02 ± 1.75%. In the best parsimonious predictive model (which explained 32% of the variability in the omega-3 index), age, educational level and seafood servings were significantly and positively associated with the index. In contrast, waist circumference and smoking were inversely associated with the index. In a mediation analysis that took account of all these factors, seafood servings explained about 40% of the association between educational level and the omega-3 index. Similar results were obtained for the income tax level. CONCLUSIONS The inverse association between SES and omega-3 index is largely explained (40%) by an insufficient seafood intake. It remains to be seen which other factors mediate this association.
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59
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Karimi R, Fisher NS, Meliker JR. Mercury-nutrient signatures in seafood and in the blood of avid seafood consumers. THE SCIENCE OF THE TOTAL ENVIRONMENT 2014; 496:636-643. [PMID: 24846746 DOI: 10.1016/j.scitotenv.2014.04.049] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2013] [Revised: 04/10/2014] [Accepted: 04/14/2014] [Indexed: 05/27/2023]
Abstract
Dietary recommendations for seafood are confusing due to the desire to balance both benefits from nutrients and risks from contaminants. The overall health value of different fish and shellfish items depends on concentrations of multiple nutrients (e.g., selenium (Se), omega-3 fatty acids) and contaminants (e.g., mercury (Hg)). However, few studies have examined the connections between human exposure to multiple nutrients and contaminants and the consumption of specific types of seafood. Our goals were to compare 1) Hg, Se and omega-3 fatty acid concentrations (Hg-nutrient signatures) among common fish and shellfish items and 2) Hg-nutrient signatures in the blood of avid seafood consumers, based on seafood consumption habits. We compiled nutrient and Hg concentration data for common fish and shellfish items from the literature. We also measured blood concentrations of Hg and seafood nutrients collected from adult, avid seafood consumers on Long Island, NY. Canonical discriminant analyses revealed distinct Hg-nutrient signatures among seafood items, and these signatures were reflected in the blood of consumers based on different consumption habits. For example, consumers with a salmon-dominated seafood diet had relatively high percentage of omega-3 fatty acids in blood, and consumers who tend to eat top predator seafood have higher Hg, but similar blood nutrient concentrations compared to consumers who tend to eat low trophic level seafood. These results provide direct evidence of links between the ecological characteristics of the type of seafood consumed and Hg-nutrient exposure. This approach helps assess the overall human health value of specific seafood types, leads to specific diet recommendations, and can be used to characterize risk:benefit status among seafood consumers.
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Affiliation(s)
- Roxanne Karimi
- Stony Brook University, School of Marine and Atmospheric Sciences, Stony Brook, NY, USA.
| | - Nicholas S Fisher
- Stony Brook University, School of Marine and Atmospheric Sciences, Stony Brook, NY, USA
| | - Jaymie R Meliker
- Stony Brook University, Program in Public Health and Department of Preventive Medicine, Stony Brook, NY, USA
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60
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Tomaiuolo G. Biomechanical properties of red blood cells in health and disease towards microfluidics. BIOMICROFLUIDICS 2014; 8:051501. [PMID: 25332724 PMCID: PMC4189537 DOI: 10.1063/1.4895755] [Citation(s) in RCA: 188] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Accepted: 09/03/2014] [Indexed: 05/04/2023]
Abstract
Red blood cells (RBCs) possess a unique capacity for undergoing cellular deformation to navigate across various human microcirculation vessels, enabling them to pass through capillaries that are smaller than their diameter and to carry out their role as gas carriers between blood and tissues. Since there is growing evidence that red blood cell deformability is impaired in some pathological conditions, measurement of RBC deformability has been the focus of numerous studies over the past decades. Nevertheless, reports on healthy and pathological RBCs are currently limited and, in many cases, are not expressed in terms of well-defined cell membrane parameters such as elasticity and viscosity. Hence, it is often difficult to integrate these results into the basic understanding of RBC behaviour, as well as into clinical applications. The aim of this review is to summarize currently available reports on RBC deformability and to highlight its association with various human diseases such as hereditary disorders (e.g., spherocytosis, elliptocytosis, ovalocytosis, and stomatocytosis), metabolic disorders (e.g., diabetes, hypercholesterolemia, obesity), adenosine triphosphate-induced membrane changes, oxidative stress, and paroxysmal nocturnal hemoglobinuria. Microfluidic techniques have been identified as the key to develop state-of-the-art dynamic experimental models for elucidating the significance of RBC membrane alterations in pathological conditions and the role that such alterations play in the microvasculature flow dynamics.
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Affiliation(s)
- Giovanna Tomaiuolo
- Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, Università di Napoli Federico II , Piazzale Tecchio 80, Napoli 80125, Italy and CEINGE Biotecnologie Avanzate , Via Gaetano Salvatore 486, Napoli 80145, Italy
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61
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Narotzki B, Reznick AZ, Mitki T, Aizenbud D, Levy Y. Enhanced Cardiovascular Risk and Altered Oxidative Status in Elders with Moderate Excessive Body Fat. Rejuvenation Res 2014; 17:334-40. [DOI: 10.1089/rej.2013.1540] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Affiliation(s)
- Baruch Narotzki
- Rappaport Faculty of Medicine, Technion–Israel Institute of Technology, Haifa, Israel
| | - Abraham Z. Reznick
- Rappaport Faculty of Medicine, Technion–Israel Institute of Technology, Haifa, Israel
| | | | - Dror Aizenbud
- Rappaport Faculty of Medicine, Technion–Israel Institute of Technology, Haifa, Israel
- Rambam Health Care Campus, Haifa, Israel
| | - Yishai Levy
- Rappaport Faculty of Medicine, Technion–Israel Institute of Technology, Haifa, Israel
- Rambam Health Care Campus, Haifa, Israel
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Barcelos RCS, Vey LT, Segat HJ, Roversi K, Roversi K, Dias VT, Trevizol F, Kuhn FT, Dolci GS, Pase CS, Piccolo J, Veit JC, Emanuelli T, Luz SCA, Bürger ME. Cross-generational trans fat intake exacerbates UV radiation-induced damage in rat skin. Food Chem Toxicol 2014; 69:38-45. [PMID: 24694906 DOI: 10.1016/j.fct.2014.03.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2014] [Revised: 02/28/2014] [Accepted: 03/25/2014] [Indexed: 01/11/2023]
Abstract
We evaluated the influence of dietary fats on ultraviolet radiation (UVR)-induced oxidative damage in skin of rats. Animals from two consecutive generations born of dams supplemented with fats during pregnancy and breastfeeding were maintained in the same supplementation: soybean-oil (SO, rich in n-6 FA, control group), fish-oil (FO, rich in n-3 FA) or hydrogenated-vegetable-fat (HVF, rich in TFA). At 90 days of age, half the animals from the 2nd generation were exposed to UVR (0.25 J/cm(2)) 3×/week for 12 weeks. The FO group presented higher incorporation of n-3 FA in dorsal skin, while the HVF group incorporated TFA. Biochemical changes per se were observed in skin of the HVF group: greater generation of reactive oxygen species (ROS), lower mitochondrial integrity and increased Na(+)K(+)-ATPase activity. UVR exposure increased skin wrinkles scores and ROS generation and decreased mitochondrial integrity and reduced-glutathione levels in the HVF group. In FO, UVR exposure was associated with smaller skin thickness and reduced levels of protein-carbonyl, together with increased catalase activity and preserved Na(+)K(+)-ATPase function. In conclusion, while FO may be protective, trans fat may be harmful to skin health by making it more vulnerable to UVR injury and thus more prone to develop photoaging and skin cancer.
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Affiliation(s)
- R C S Barcelos
- Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Maria (UFSM), RS, Brazil
| | - L T Vey
- Departamento de Fisiologia e Farmacologia, UFSM, RS, Brazil
| | - H J Segat
- Departamento de Fisiologia e Farmacologia, UFSM, RS, Brazil
| | - K Roversi
- Departamento de Fisiologia e Farmacologia, UFSM, RS, Brazil
| | - Kr Roversi
- Departamento de Fisiologia e Farmacologia, UFSM, RS, Brazil
| | - V T Dias
- Departamento de Fisiologia e Farmacologia, UFSM, RS, Brazil
| | - F Trevizol
- Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Maria (UFSM), RS, Brazil
| | - F T Kuhn
- Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Maria (UFSM), RS, Brazil
| | - G S Dolci
- Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Maria (UFSM), RS, Brazil
| | - C S Pase
- Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Maria (UFSM), RS, Brazil
| | - J Piccolo
- Departamento de Tecnologia dos Alimentos, Programa de Pós-Graduação em Ciência Tecnologia dos Alimentos, UFSM, RS, Brazil
| | - J C Veit
- Departamento de Tecnologia dos Alimentos, Programa de Pós-Graduação em Ciência Tecnologia dos Alimentos, UFSM, RS, Brazil
| | - T Emanuelli
- Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Maria (UFSM), RS, Brazil; Departamento de Tecnologia dos Alimentos, Programa de Pós-Graduação em Ciência Tecnologia dos Alimentos, UFSM, RS, Brazil
| | - S C A Luz
- Departamento de Patologia, UFSM, RS, Brazil
| | - M E Bürger
- Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Maria (UFSM), RS, Brazil; Departamento de Fisiologia e Farmacologia, UFSM, RS, Brazil.
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Peluso MEM, Munnia A, Tarocchi M, Arciello M, Balsano C, Giese RW, Galli A. Exocycilic DNA Adducts in a Murine Model of Non-alcoholic Steatohepatitis. ACTA ACUST UNITED AC 2013; 2013. [PMID: 31528500 PMCID: PMC6746424 DOI: 10.4172/2157-2518.s3-003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Introduction: Non-alcoholic fatty liver disease is the most common hepatic disorder in Western countries. The transition from abnormal accumulation of lipids toward non-alcoholic steatohepatitis (NASH) represents a key step in the development of chronic liver pathologies. Oxidative stress and lipid peroxidation have often been proposed as mechanisms in the progression to steatohepatitis. Methods: We have examined the hepatic levels of exocyclic DNA adducts, indicated from 3-(2-deoxy-β-D-erythro-pentafuranosyl)pyrimido[1,2-α]purin-10(3H)-one deoxyguanosine (M1dG) adduct, a biomarker of oxidative stress and lipid peroxidation, in a murine model of NASH using the 32P-DNA postlabeling assay. Results: Our findings show that C57BL/6 mice fed with high-fat and cholesterol diet developed signs associated with NASH after eight weeks, whereas there was no evidence of steatosis in control mice. The score for steatohepatitis ranged from grade 2 to 3 for steatosis, inflammation, and fibrosis, showing that the experimental diet was able to induce pathologic alterations of the parenchyma in eight weeks. Higher levels of M1dG adducts were detected in the livers of C57BL/6 mice which developed experimental NASH after eight weeks of high-fat and cholesterol feed, 5.6 M 1dG ± 0.4 (SE) per 106 total nucleotides, as compared to control mice, 1.6 M1dG ± 0.4 (SE). The statistical analysis showed that the increment of oxidatively damaged DNA in mice with NASH raised on high-fat and cholesterol diet was statistically significant as compared to control mice, P=0.006. Conclusions: Our report suggests a link between NASH and M1dG in experimental animals fed with a diet rich in saturated fats and cholesterol. High-fat and cholesterol may act together in inducing a broader spectrum of oxidatively damaged DNA, including exocyclic DNA adducts, that may contribute to the decline of hepatocyte functions, from disturbance of critical pathways, such as transcription and replication, triggering transient or permanent cell-cycle arrest and cell-death, up to chromosomal instability.
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Affiliation(s)
- Marco E M Peluso
- Cancer Risk Factor Branch, Cancer Prevention and Research Institute, Florence, Italy
| | - Armelle Munnia
- Cancer Risk Factor Branch, Cancer Prevention and Research Institute, Florence, Italy
| | - Mirko Tarocchi
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, Florence, Italy
| | - Mario Arciello
- Department of Internal Medicine and Medical Specialties "Sapienza" University of Rome, Rome, Italy
| | - Clara Balsano
- CNR-IBPM Istituto di Biologia e Patologia Molecolare, Rome, Italy
| | - Roger W Giese
- Department of Pharmaceutical Sciences in the Bouve College of Health Sciences, Barnett Institute, Northeastern University, Boston, Massachusetts, USA
| | - Andrea Galli
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, Florence, Italy
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Structural and Compositional Changes in Erythrocyte Membrane of Obese Compared to Normal-Weight Adolescents. J Membr Biol 2013; 246:939-47. [DOI: 10.1007/s00232-013-9596-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2013] [Accepted: 09/24/2013] [Indexed: 10/26/2022]
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65
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Pytel E, Olszewska-Banaszczyk M, Koter-Michalak M, Broncel M. Increased oxidative stress and decreased membrane fluidity in erythrocytes of CAD patients. Biochem Cell Biol 2013; 91:315-8. [DOI: 10.1139/bcb-2013-0027] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
One of many risk factors for cardiovascular disease appears to be oxidative stress. To estimate possible changes in redox balance, membrane fluidity, and cholesterol level in erythrocytes was collected erythrocytes from patients diagnosed with coronary artery disease (CAD). The study included 20 patients with previous myocardial infarction occurring more than 6 months prior to the time of screening with low-density lipoprotein cholesterol (LDL-C) >70 mg/dL and 21 healthy controls. The following parameters were studied: catalase, glutathione peroxidase (GPx), superoxide dismutase (SOD), thiobarbituric acid reactive substrates (TBARS), sulfhydryl (SH) groups in membrane protein, total cholesterol level, and erythrocyte membrane fluidity. Our study showed an increase in the level of lipid peroxidation (13%) and total cholesterol (19%), and a decrease in membrane fluidity (14%) in the subsurface layers and in the deeper layers of erythrocyte membrane (7%) isolated from patients with CAD in comparison to healthy controls. A significant decrease in catalase (10%) and SOD (17%) activities were also observed. No changes in GPx activity or the level of SH groups were observed. Our study indicates that there are disorders in the antioxidant system as well as changes in the membrane structure of erythrocytes obtained from CAD patients.
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Affiliation(s)
- Edyta Pytel
- Department of Environment Pollution Biophysics, Faculty of Biology and Environmental Protection, University of Łódź, 141/143 Pomorska St., 90-236 Łódź, Poland
| | - Małgorzata Olszewska-Banaszczyk
- Department of Internal Diseases and Clinical Pharmacology, Medical University of Łódź, 1/5 Kniaziewicza St., 91-347 Łódź, Poland
| | - Maria Koter-Michalak
- Department of Environment Pollution Biophysics, Faculty of Biology and Environmental Protection, University of Łódź, 141/143 Pomorska St., 90-236 Łódź, Poland
| | - Marlena Broncel
- Department of Internal Diseases and Clinical Pharmacology, Medical University of Łódź, 1/5 Kniaziewicza St., 91-347 Łódź, Poland
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Ferreira LCCDN, da Silva HJG, Lins TA, do Prado WL. Relationship between lipid and hematological profiles with adiposity in obese adolescents. Rev Bras Hematol Hemoter 2013; 35:163-6. [PMID: 23904803 PMCID: PMC3728126 DOI: 10.5581/1516-8484.20130051] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2012] [Accepted: 08/12/2012] [Indexed: 12/02/2022] Open
Abstract
Background An excess of weight including obesity have reached epidemic rates in all age
groups, both in developed and developing countries. It is notable that overweight
children and adolescents have a higher likelihood of becoming obese adults and to
present health-related problems early in life. Objetives To verify associations of the lipid and hematological profiles with adiposity in
obese adolescents beginning multidisciplinary weight loss therapy. Methods This cross-sectional study was conducted with 85 adolescents of both genders, aged
12-19 years (Tanner staging 3 or 4) and body mass index greater than the
95th percentile. The sum of the triceps, subscapular and calf
skinfolds and the waist circumference were used to estimate adiposity. Blood
samples were collected from all patients after overnight fasting to analyze blood
lipids (total cholesterol, high-density lipoprotein, low-density lipoprotein, very
low-density lipoprotein and triglycerides), blood sugar and the hematological
profile (hemoglobin, platelets and red blood cells). The Kolmogorov-Smirnov test
and Spearman and Pearson correlation coefficients were used for statistical
analysis with significance set for p-values ≤ 0.05. Results There were statistical differences between genders for red blood cells (p-value =
0.000), hemoglobin (p-value = 0.000) and platelets (p-value = 0.002). Positive
correlations were found for red blood cells (p-value = 0.031) and hemoglobin
(p-value = 0.024) with waist circumference. There was a negative correlation
between hemoglobin and the sum of skinfolds (p-value = 0.022). Conclusion The results demonstrate an association between the lipid and hematological
profiles and body adiposity in obese adolescents thus reinforcing the importance
of treating obese adolescents early to prevent health related problems in adult
life.
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Cazzola R, Cassani E, Barichella M, Cestaro B. Impaired fluidity and oxidizability of HDL hydrophobic core and amphipathic surface in dyslipidemic men. Metabolism 2013; 62:986-91. [PMID: 23414907 DOI: 10.1016/j.metabol.2013.01.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2012] [Revised: 01/10/2013] [Accepted: 01/11/2013] [Indexed: 11/19/2022]
Abstract
OBJECTIVE To examine and compare the composition, fluidity and oxidizability of HDL hydrophobic core and amphipathic surface of two groups of adult males (25kg/m²<BMI<30kg/m²), the former mixed dyslipidemic patients (MD) and the latter age- and BMI-matched healthy controls. METHODS AND RESULTS Pyrenyl-cholesteryl ester and pyrenyl-phosphatidylcholine, respectively incorporated in HDL core or surface were used for measuring both 2,2'-azobis-2-methyl-propanimidamide-dihydrochloride-induced peroxidation kinetics and fluidities of these regions. In comparison with the controls, MD HDL showed: a) higher free cholesterol to phospholipid ratio in surface and triacylglycerols to cholesteryl ester ratio in the core, b) higher malondialdehyde levels and lower alpha-tocopherol and beta-carotene to neutral lipid ratios, c) a more rigid surface and more fluid core, d) dramatically decreased lag-time and increased propagation rate of peroxidation kinetic in the core, but only an increased propagation rate on the surface. CONCLUSION These results suggest that better knowledge of the physical-chemical properties and oxidizability of HDL core and surface could contribute to better understanding of the mechanisms connecting HDL alteration to increased risk of CDV in MD.
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Affiliation(s)
- Roberta Cazzola
- Department of Biomedical and Clinical Sciences L. Sacco-Faculty of Medicine and Surgery-University of Milan, Via G. B. Grassi, 74 - 20157 Milan, Italy.
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Tsuda K. Chronic kidney disease predicts impaired membrane microviscosity of red blood cells in hypertensive and normotensive subjects. Int Heart J 2013; 54:154-9. [PMID: 23774239 DOI: 10.1536/ihj.54.154] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Current evidence indicates that abnormalities in physical properties of the cell membranes may be strongly linked to hypertension and other circulatory disorders. Recent studies have shown that chronic kidney disease (CKD) might be a risk factor for cardiovascular and cerebrovascular outcomes. The purpose of the present study was to examine the possible relationship between kidney function and membrane fluidity (a reciprocal value of membrane microviscosity) of red blood cells (RBCs) in hypertensive and normotensive subjects using an electron spin resonance (ESR) and spin-labeling method. The order parameter (S) for the ESR spin-label agent (5-nitroxide stearate) in RBC membranes was significantly higher in hypertensive subjects than in normotensive subjects, indicating that membrane fluidity was decreased in hypertension. The order parameter (S) of RBCs was inversely correlated with estimated glomerular filtration rate (eGFR), suggesting that a decreased eGFR value might be associated with reduced membrane fluidity of RBCs. Multivariate regression analysis also demonstrated that, after adjustment for general risk factors, eGFR might be a significant predictor of membrane fluidity of RBCs. The reduced levels of both membrane fluidity of RBCs and eGFR were associated with increased plasma 8-iso-prostaglandin F2α (an index of oxidative stress) and decreased plasma nitric oxide (NO)-metabolites, suggesting that kidney function could be a determinant of membrane microviscosity of RBCs, at least in part, via oxidative stress- and NO-dependent mechanisms. The ESR study suggests that CKD might have a close correlation with impaired rheologic behavior of RBCs and microcirculatory disorders in hypertensive subjects.
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Affiliation(s)
- Kazushi Tsuda
- Cardiovascular and Metabolic Research Center, Kansai University of Health Sciences, Osaka, Japan
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69
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Barcelos RCS, Segat HJ, Benvegnú DM, Trevizol F, Roversi K, Dolci GS, Dias VT, Piccolo J, Veit JC, Emanuelli T, Bürger ME. Trans Fat Supplementation Increases UV-Radiation-Induced Oxidative Damage on Skin of Mice. Lipids 2013; 48:977-87. [DOI: 10.1007/s11745-013-3802-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2012] [Accepted: 05/17/2013] [Indexed: 10/26/2022]
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Rodrigo R, Miranda-Merchak A, Valenzuela Grau R, Bachler JP, Vergara L. Modulation of (Na,K)-ATPase activity by membrane fatty acid composition: therapeutic implications in human hypertension. Clin Exp Hypertens 2013; 36:17-26. [DOI: 10.3109/10641963.2013.783048] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Tvarijonaviciute A, Ceron JJ, Tecles F. Acetylcholinesterase and butyrylcholinesterase activities in obese Beagle dogs before and after weight loss. Vet Clin Pathol 2013; 42:207-11. [DOI: 10.1111/vcp.12032] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Asta Tvarijonaviciute
- Department of Animal Medicine and Surgery; Faculty of Veterinary Medicine; Regional Campus of International Excellence “Campus Mare Nostrum; University of Murcia; Murcia; Spain
| | - Jose J. Ceron
- Department of Animal Medicine and Surgery; Faculty of Veterinary Medicine; Regional Campus of International Excellence “Campus Mare Nostrum; University of Murcia; Murcia; Spain
| | - Fernando Tecles
- Department of Animal Medicine and Surgery; Faculty of Veterinary Medicine; Regional Campus of International Excellence “Campus Mare Nostrum; University of Murcia; Murcia; Spain
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de Arvelos LR, Rocha VCA, Felix GP, da Cunha CC, Bernardino Neto M, da Silva Garrote Filho M, de Fátima Pinheiro C, Resende ES, Penha-Silva N. Bivariate and multivariate analyses of the influence of blood variables of patients submitted to Roux-en-Y gastric bypass on the stability of erythrocyte membrane against the chaotropic action of ethanol. J Membr Biol 2013; 246:231-42. [PMID: 23344659 DOI: 10.1007/s00232-013-9524-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2012] [Accepted: 01/01/2013] [Indexed: 11/26/2022]
Abstract
The stability of the erythrocyte membrane, which is essential for the maintenance of cell functions, occurs in a critical region of fluidity, which depends largely on its composition and the composition and characteristics of the medium. As the composition of the erythrocyte membrane is influenced by several blood variables, the stability of the erythrocyte membrane must have relations with them. The present study aimed to evaluate, by bivariate and multivariate statistical analyses, the correlations and causal relationships between hematologic and biochemical variables and the stability of the erythrocyte membrane against the chaotropic action of ethanol. The validity of this type of analysis depends on the homogeneity of the population and on the variability of the studied parameters, conditions that can be filled by patients who undergo bariatric surgery by the technique of Roux-en-Y gastric bypass since they will suffer feeding restrictions that have great impact on their blood composition. Pathway analysis revealed that an increase in hemoglobin leads to decreased stability of the cell, probably through a process mediated by an increase in mean corpuscular volume. Furthermore, an increase in the mean corpuscular hemoglobin (MCH) leads to an increase in erythrocyte membrane stability, probably because higher values of MCH are associated with smaller quantities of red blood cells and a larger contact area between the cell membrane and ethanol present in the medium.
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Affiliation(s)
- Leticia Ramos de Arvelos
- Instituto de Genética e Bioquímica, Universidade Federal de Uberlândia, Av. Pará, 1720, Uberlândia, MG 38400-902, Brazil
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Ma H, Xu C, Xu L, Yu C, Miao M, Li Y. Independent association of HbA1c and nonalcoholic fatty liver disease in an elderly Chinese population. BMC Gastroenterol 2013; 13:3. [PMID: 23294935 PMCID: PMC3543719 DOI: 10.1186/1471-230x-13-3] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2012] [Accepted: 12/14/2012] [Indexed: 01/07/2023] Open
Abstract
Background To investigate the association between serum glycosylated hemoglobin (HbA1c) levels and nonalcoholic fatty liver disease (NAFLD) in an elderly Chinese population. Methods A cross-sectional study was performed among the 949 retired elderly employees of Zhenhai Refining & Chemical Company Ltd., Ningbo, China. Results A total of 257 (27.08%) subjects fulfilled the diagnostic criteria of NAFLD, and NAFLD patients had significantly higher serum HbA1c levels than controls (P <0.001). The prevalence of NAFLD was significantly higher in subjects with increased serum HbA1c level (HbA1c ≥6.5%) than in those with normal range of serum HbA1c level (51.71% vs. 25.20%; P <0.001), and the prevalence increased along with progressively higher serum HbA1c levels (P for trend <0.001). Stepwise logistic regression analysis showed that serum HbA1c level was significantly associated with the risk for NAFLD (odds ratio: 1.547, 95% confidence interval: 1.054 – 2.270; P =0.026). Conclusions Our results suggest that serum HbA1c level is associated with NAFLD, and increased serum HbA1c level is an independent risk factor for NAFLD in elderly Chinese.
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Affiliation(s)
- Han Ma
- Department of Gastroenterology, the First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
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74
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Harris WS, Pottala JV, Lacey SM, Vasan RS, Larson MG, Robins SJ. Clinical correlates and heritability of erythrocyte eicosapentaenoic and docosahexaenoic acid content in the Framingham Heart Study. Atherosclerosis 2012; 225:425-31. [PMID: 22727409 PMCID: PMC3593234 DOI: 10.1016/j.atherosclerosis.2012.05.030] [Citation(s) in RCA: 113] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2012] [Revised: 05/22/2012] [Accepted: 05/23/2012] [Indexed: 01/25/2023]
Abstract
OBJECTIVES Red blood cell (RBC) levels of eicosapentaenoic acid (EPA) plus docosahexaenoic acid (DHA, the omega-3 index, expressed as a percent of total fatty acids) are inversely related to risk for cardiovascular disease (CVD). Although several mechanisms underlying this relationship have been proposed, understanding the associations between the omega-3 index and markers of CVD in the community can shed additional light on this question. The objectives of this study were to define the relations between the omega-3 index and clinical factors and to determine the heritability of the omega-3 index. METHODS RBC samples (n = 3196) drawn between 2005 and 2008 from participants in the Framingham Study [Examination 8 of the Offspring cohort plus Examination 3 of the Omni (minorities) cohort] were analyzed for fatty acid composition by gas chromatography. RESULTS The mean (SD) omega-3 index was 5.6% (1.7%). In multivariable regression models, the factors significantly and directly associated with the omega-3 index were age, female sex, higher education, fish oil supplementation, dietary intake of EPA + DHA, aspirin use, lipid pharmacotherapy, and LDL-cholesterol. Factors inversely associated were Offspring cohort, heart rate, waist girth, triglycerides and smoking. The total explained variability in the omega-3 index for the fully adjusted model was 73%, which included major components due to heritability (24%), EPA + DHA intake (25%), and fish oil supplementation (15%). CONCLUSION The variability in the omega-3 index is determined primarily by dietary and genetic factors. An increased omega-3 index is associated with a generally cardioprotective risk factor milieu.
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Affiliation(s)
- William S Harris
- Sanford Research/USD, 2301 E. 60th St. N, Sioux Falls, SD 57104, USA.
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75
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Association of the gene encoding stearoyl-CoA desaturase (SCD) with fatty acid composition in an intercross population between Landrace and Korean native pigs. Mol Biol Rep 2012; 40:73-80. [PMID: 23124221 DOI: 10.1007/s11033-012-2014-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2012] [Accepted: 10/01/2012] [Indexed: 10/27/2022]
Abstract
Fatty acid (FA) composition is one of the most important parameters for the evaluation of meat quality. The stearoyl-CoA desaturase (SCD) gene is considered a positional candidate gene affecting FA composition in SSC14, based on previous quantitative trait loci studies. To evaluate the association of the SCD gene with FA composition in a Korean native pig × Landrace F(2) intercross population, we genotyped six single nucleotide polymorphisms (SNPs) of the SCD gene located in promoter region [2 SNPs (g.-353T>C, g.-233T>C)], exonic region [1 SNP (g.817C>T) in exon 2] and 3' UTR [3 SNPs (g.13311C>G, g.14384G>A, and g.14424C>T)] identified by massively parallel sequencing technology. Eighteen FA composition traits were measured in more than the 950 F(2) animals. A mixed-effect model was used to evaluate associations between these SNPs and FA composition traits in the F(2) intercross population. A detailed investigation detected that the five FA composition traits [palmitoleic acid (C16:1), stearic acid (C18:0), arachidic acid (C20:0), saturated FA, and unsaturated FA] were highly significant (P < 4.7 × 10(-5); C20:0) in association with the SNP g.-233T>C, SNP g.817C>T, SNP g.13311C>G and SNP g.14384G>A in the SCD gene, whereas SNP g.14424C>T was only significantly associated with palmitoleic acid (C16:1, P = 1.4 × 10(-3)). No significant association of FA composition traits with SNP g.-353T>C was detected. In particular, the SNP g.14384G>A accounted for 30.6 % of the additive genetic variance of palmitoleic acid (P = 1.9 × 10(-10)). These results suggest the SCD gene has a strong effect on FA composition in the crossbred pig population.
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Effects of DHA-phospholipids, melatonin and tryptophan supplementation on erythrocyte membrane physico-chemical properties in elderly patients suffering from mild cognitive impairment. Exp Gerontol 2012; 47:974-8. [PMID: 23000875 DOI: 10.1016/j.exger.2012.09.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2012] [Revised: 08/01/2012] [Accepted: 09/11/2012] [Indexed: 01/23/2023]
Abstract
A randomized, double-blind placebo-controlled clinical trial was carried out to assess the efficacy of a docosahexenoic acid (DHA)-phospholipids, melatonin and tryptophan supplemented diet in improving the erythrocyte oxidative stress, membrane fluidity and membrane-bound enzyme activities of elderly subjects suffering from mild cognitive impairment (MCI). These subjects were randomly assigned to the supplement group (11 subjects, 9F and 2M; age 85.3±5.3y) or placebo group (14-matched subjects, 11F and 3M; 86.1±6.5). The duration of the treatment was 12weeks. The placebo group showed no significant changes in erythrocyte membrane composition and function. The erythrocyte membranes of the supplement group showed a significant increase in eicosapentenoic acid, docosapentenoic acid and DHA concentrations and a significant decrease in arachidonic acid, malondialdehyde and lipofuscin levels. These changes in membrane composition resulted in an increase in the unsaturation index, membrane fluidity and acetylcholine esterase activity. Moreover, a significant increase in the ratio between reduced and oxidized glutathione was observed in the erythrocyte of the supplement group. Although this study is a preliminary investigation, we believe these findings to be of great speculative and interpretative interest to better understand the complex and multi-factorial mechanisms behind the possible links between diets, their functional components and possible molecular processes that contribute to increasing the risk of developing MCI and Alzheimer's.
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Externalization of phosphatidylserine from inner to outer layer may alter the effect of plant sterols on human erythrocyte membrane — The Langmuir monolayer studies. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2012; 1818:2184-91. [DOI: 10.1016/j.bbamem.2012.05.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2012] [Revised: 05/06/2012] [Accepted: 05/08/2012] [Indexed: 11/21/2022]
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Vitamin E supplementation protects erythrocyte membranes from oxidative stress in healthy Chinese middle-aged and elderly people. Nutr Res 2012; 32:328-34. [DOI: 10.1016/j.nutres.2012.03.012] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2011] [Revised: 03/12/2012] [Accepted: 03/23/2012] [Indexed: 01/06/2023]
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Langmuir monolayers studies on the relationship between the content of cholesterol in model erythrocyte membranes and the influence of β-sitosterol. Colloids Surf B Biointerfaces 2012; 91:226-33. [DOI: 10.1016/j.colsurfb.2011.11.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2011] [Revised: 11/02/2011] [Accepted: 11/04/2011] [Indexed: 11/21/2022]
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80
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Hackl EV, Berest VP, Gatash SV. Effect of Cholesterol Content on Gramicidin S-Induced Hemolysis of Erythrocytes. Int J Pept Res Ther 2012. [DOI: 10.1007/s10989-012-9289-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Ladesich JB, Pottala JV, Romaker A, Harris WS. Membrane level of omega-3 docosahexaenoic acid is associated with severity of obstructive sleep apnea. J Clin Sleep Med 2012; 7:391-6. [PMID: 21897776 DOI: 10.5664/jcsm.1198] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND Patients with obstructive sleep apnea (OSA) are at increased risk of cardiovascular disease (CVD). The omega-3 fatty acid docosahexaenoic acid (DHA) is a major component of neural tissues, and supplementation with fish oils improves autonomic tone and reduces risk for CVD. A link between low DHA status and less mature sleep patterns was observed in newborns. METHODS We investigated the relations between red blood cell (RBC) levels of DHA and OSA severity in 350 sequential patients undergoing sleep studies. Severity categories were defined as none/mild, moderate, and severe, based on apnea hypopnea index (AHI) scores of 0 to 14, 15 to 34, and > 34, respectively. RESULTS After controlling for age, sex, race, smoking, BMI, alcohol intake, fish intake, and omega-3 supplementation, RBC DHA was inversely related with OSA severity. For each 1-SD increase in DHA levels, a patient was about 50% less likely to be classified with severe OSA. The odds ratios (95% CI) were 0.47 (0.28 to 0.80) and 0.55 (0.31 to 0.99) for being in the severe group versus the none/mild or moderate groups, respectively. CONCLUSION These findings suggest that disordered membrane fatty acid patterns may play a causal role in OSA and that the assessment of RBC DHA levels might help in the diagnosis of OSA. The effects of DHA supplementation on OSA should be explored.
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Affiliation(s)
- James B Ladesich
- University of Missouri-Kansas City School of Medicine, Kansas City, MO, USA
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Associations between High-Sensitivity C-Reactive Protein and Membrane Fluidity of Red Blood Cells in Hypertensive Elderly Men: An Electron Spin Resonance Study. Int J Hypertens 2012; 2012:292803. [PMID: 22518282 PMCID: PMC3296171 DOI: 10.1155/2012/292803] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2011] [Accepted: 10/13/2011] [Indexed: 11/27/2022] Open
Abstract
Recent evidence indicates that high-sensitivity C-reactive protein (hs-CRP), an acute phase of an inflammatory marker, might be associated with atherosclerosis, hypertension, and other cardiovascular diseases. The present study was performed to assess the possible link between plasma hs-CRP and membrane fluidity (a reciprocal value of membrane microviscosity) in hypertensive elderly men. We measured the membrane fluidity of red blood cells (RBCs) in hypertensive and normotensive elderly men using an electron spin resonance and spin-labeling method. Membrane fluidity of RBCs was decreased in hypertensive elderly men compared with normotensive elderly men. Plasma hs-CRP levels were significantly higher in hypertensive elderly men than in normotensive elderly men. In contrast, plasma nitric-oxide- (NO-) metabolite levels were lower in hypertensive elderly men than in normotensive elderly men. The reduced membrane fluidity of RBCs was associated with increased plasma hs-CRP and decreased plasma NO-metabolite levels. In a multivariate regression analysis, plasma hs-CRP was an independent determinant of membrane fluidity of RBCs after adjustment for general risk factors. The results suggest that CRP might have a close correlation with the rheologic behavior of RBCs and the microcirculation and would contribute, at least in part, to the circulatory dysfunction and vascular complications in hypertensive elderly men.
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Abstract
Aims To provide common Organic Chemistry/Polymer Science thermoset free-radical crosslinking Sciences for Medical understanding and also present research findings for several common vitamins/antioxidants with a new class of drugs known as free-radical inhibitors. Study Design Peroxide/Fenton transition-metal redox couples that generate free radicals were combined with unsaturated lipid oils to demonstrate thermoset-polymer chain growth by crosslinking with the α-β-unsaturated aldehyde acrolein into rubbery/adhesive solids. Further, Vitamin A and beta carotene were similarly studied for crosslink pathological potential. Also, free-radical inhibitor hydroquinone was compared for antioxidant capability with Vitamin E. Place and Duration of Study Department of Materials Science and Engineering and Department of Biomaterials, University of Alabama at Birmingham, between June 2005 and August 2012. Methodology Observations were recorded for Fenton free-radical crosslinking of unsaturated lipids and vitamin A/beta carotene by photography further with weight measurements and percent-shrinkage testing directly related to covalent crosslinking of unsaturated lipids recorded over time with different concentrations of acrolein. Also, hydroquinone and vitamin E were compared at concentrations from 0.0–7.3wt% as antioxidants for reductions in percent-shrinkage measurements, n = 5. Results Unsaturated lipid oils responded to Fenton thermoset-polymer reactive secondary sequence reactions only by acrolein with crosslinking into rubbery-type solids and different non-solid gluey products. Further, molecular oxygen crosslinking was demonstrated with lipid peroxidation and acrolein at specially identified margins. By peroxide/Fenton free-radical testing, both vitamin A and beta-carotene demonstrated possible pathology chemistry for chain-growth crosslinking. During lipid/acrolein testing over a 50 hour time period at 7.3wt% antioxidants, hydroquinone significantly reduced percent shrinkage greatly compared to the standard antioxidant vitamin E, %shrinkage at 11.6 ±1.3 for hydroquinone and 27.8 ±2.2 for vitamin E, P = .001. Conclusion Free radicals crosslinked unsaturated lipid fatty acids into thermoset polymers through Fenton reactions when combined with acrolein. Further, hydroquinone was a superior antioxidant to vitamin E.
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Affiliation(s)
- Richard C Petersen
- University of Alabama at Birmingham, SDB 539, 1919 7 Avenue South, Biomaterials and Biomedical Engineering, Birmingham AL 35294, USA
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Tsuda K. Associations of oxidative stress and inflammation and their role in the regulation of membrane fluidity of red blood cells in hypertensive and normotensive men: An electron spin resonance investigation. ACTA ACUST UNITED AC 2012. [DOI: 10.4236/abb.2012.327124] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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85
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Red wine polyphenols protect n−3 more than n−6 polyunsaturated fatty acid from lipid peroxidation. Food Res Int 2011. [DOI: 10.1016/j.foodres.2011.07.029] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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86
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Gallardo-Rodríguez JJ, García-Camacho F, Sánchez-Mirón A, López-Rosales L, Chisti Y, Molina-Grima E. Shear-induced changes in membrane fluidity during culture of a fragile dinoflagellate microalga. Biotechnol Prog 2011; 28:467-73. [PMID: 22034201 DOI: 10.1002/btpr.737] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2011] [Revised: 09/21/2011] [Indexed: 12/29/2022]
Abstract
The commonly used shear protective agent Pluronic F68 (PF68) was toxic to the marine dinoflagellate microalga Protoceratium reticulatum, but had a shear-protective effect on it at concentrations of ≤ 0.5 g L(-1) . Supplementation of P. reticulatum cultures with PF68 actually increased the fluidity of the cell membrane; therefore, the shear protective effect of PF68 could not be ascribed to reduced membrane fluidity, an explanation that has been commonly used in relation to its shear protective effect on animal cells. Data are reported on the membrane fluidity of P. reticulatum and its response to the presence of PF68 under sublethal and lethal turbulence regimens. The membrane fluidity was found to depend strongly on the level of lipoperoxides in the cells produced under lethal agitation.
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87
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Ochoa JJ, Pamplona R, Ramirez-Tortosa MC, Granados-Principal S, Perez-Lopez P, Naudí A, Portero-Otin M, López-Frías M, Battino M, Quiles JL. Age-related changes in brain mitochondrial DNA deletion and oxidative stress are differentially modulated by dietary fat type and coenzyme Q₁₀. Free Radic Biol Med 2011; 50:1053-64. [PMID: 21335087 DOI: 10.1016/j.freeradbiomed.2011.02.004] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2010] [Revised: 01/24/2011] [Accepted: 02/08/2011] [Indexed: 11/23/2022]
Abstract
Mitochondria-related oxidative damage is a primary event in aging and age-related neurodegenerative disorders. Some dietary treatments, such as antioxidant supplementation or the enrichment of mitochondrial membranes with less oxidizable fatty acids, reduce lipid peroxidation and lengthen life span in rodents. This study compares life-long feeding on monounsaturated fatty acids (MUFAs), such as virgin olive oil, and n-6 polyunsaturated fatty acids, such as sunflower oil, with or without coenzyme Q₁₀ supplementation, with respect to age-related molecular changes in rat brain mitochondria. The MUFA diet led to diminished age-related phenotypic changes, with lipoxidation-derived protein markers being higher among the older animals, whereas protein carbonyl compounds were lower. It is noteworthy that the MUFA diet prevented the age-related increase in levels of mitochondrial DNA deletions in the brain mitochondria from aged animals. The findings of this study suggest that age-related oxidative stress is related, at the mitochondrial level, to other age-related features such as mitochondrial electron transport and mtDNA alterations, and it can be modulated by selecting an appropriate dietary fat type and/or by suitable supplementation with low levels of the antioxidant/electron carrier molecule coenzyme Q.
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Affiliation(s)
- Julio J Ochoa
- Institute of Nutrition and Food Technology José Mataix Verdú, University of Granada, 18071 Granada, Spain
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88
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Fitschen PJ, Rolfhus KR, Winfrey MR, Allen BK, Manzy M, Maher MA. Cardiovascular effects of consumption of black versus English walnuts. J Med Food 2011; 14:890-8. [PMID: 21488754 DOI: 10.1089/jmf.2010.0169] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
English walnuts have been shown to decrease cardiovascular disease risk; however, black walnuts do not appear to have not been studied for their cardioprotective effects. The purpose of this study was to determine the effects of English versus black walnut consumption on blood lipids, body weight, fatty-acid composition of red blood cell (RBC) membranes, and endothelial function. Consumption of 30 g of English walnuts per day for 30 days, by 36 human participants, improved blood lipids; the effects of black walnuts were dependent on the participant's sex. Addition of either nut to the diet did not result in weight gain. The fatty-acid composition of RBC membranes was favorably affected by walnut consumption. RBC polyunsaturated fatty acids increased after consumption of either type of nut; however, eicosapentaenoic acid increased significantly more after English walnut consumption. Endothelial function of 6 unmedicated humans with hypercholesterolemia was maintained after consumption of English walnuts with a meal high in high saturated fats; however, consumption of black walnuts with the same meal did not maintain endothelial function. Overall, these results support the recommendation that consumption of 1 oz of English walnuts per day may decrease cardiovascular risk, but more research on black walnut consumption is necessary before an appropriate recommendation can be made.
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Affiliation(s)
- Peter J Fitschen
- Department of Biology, University of Wisconsin-La Crosse, La Crosse, Wisconsin 54601, USA
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89
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Tsuda K. Roles of adiponectin and oxidative stress in the regulation of membrane microviscosity of red blood cells in hypertensive men-an electron spin resonance study. J Obes 2011; 2011:548140. [PMID: 20871823 PMCID: PMC2943124 DOI: 10.1155/2011/548140] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2010] [Accepted: 07/18/2010] [Indexed: 02/07/2023] Open
Abstract
This study was undertaken to investigate possible relationships among plasma adiponectin, 8-iso-prostaglandin F2α (8-iso-PG F2α: an index of oxidative stress), and membrane fluidity (a reciprocal value of microviscosity) in hypertensive and normotensive men using an electron spin resonance-method. The order parameter (S) for the spin-label agent (5-nitroxide stearate) in red blood cell (RBC) membranes was higher in hypertensive men than in normotensive men, indicating that membrane fluidity was decreased in hypertension. Plasma adiponectin and NO metabolites levels were lower in hypertensive men than in normotensive men. In contrast, plasma 8-iso-PG F2α levels were increased in hypertensive men compared with normotensive men. Plasma adiponectin concentration was correlated with plasma NO-metabolites, and inversely correlated with plasma 8-iso-PG F2α. The order parameter (S) of RBCs was inversely correlated with plasma adiponectin and plasma NO metabolite levels, and positively correlated with plasma 8-iso-PG F2α, suggesting that the reduced membrane fluidity of RBCs might be associated with hypoadiponectinemia, endothelial dysfunction, and increased oxidative stress. In a multivariate regression analysis, adiponectin and 8-iso-PG F2α were significant determinants of membrane fluidity of RBCs after adjustment for general risk factors. These results suggest that adiponectin and oxidative stress might have a close correlation with rheologic behavior and microcirculation in hypertension.
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Affiliation(s)
- Kazushi Tsuda
- Cardiovascular and Metabolic Research Center, Kansai University of Health Sciences, Senn-nann-gunn, Kumatori-cho, Wakaba 2-11-1, Osaka 590-0482, Japan
- Division of Cardiology, Department of Medicine, Wakayama Medical University, Wakayama 641-8509, Japan
- *Kazushi Tsuda:
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90
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Pérez-Hernández IH, Avendaño-Flores YS, Mejía-Zepeda R. Analysis of the membrane fluidity of erythrocyte ghosts in diabetic, spontaneously hypertensive rats. Acta Diabetol 2010; 47 Suppl 1:47-55. [PMID: 19404568 DOI: 10.1007/s00592-009-0120-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2009] [Accepted: 04/06/2009] [Indexed: 10/20/2022]
Abstract
Diabetes and hypertension are closely related diseases associated with changes in membrane fluidity. Here, we measured the membrane fluidity of erythrocyte ghosts from spontaneously hypertensive rats (SHR), with or without streptozotocin (STZ)-induced diabetes, at the ages of 1, 3 and 6 months, by introducing the use of the intramolecular excimer forming dipyrenylpropane (DPyP) in this model. Type 2 diabetes mellitus (T2DM) was induced in 48-h-old, newborn male SHR by intraperitoneal injection of STZ. We found lower excimer to monomer (I (e)/I (m)) DPyP ratios in diabetic SHR than in control SHR at 3 and 6 months old, indicating a decrease in membrane fluidity. Simultaneously, the composition of fatty acids was determined and it was found that the unsaturated to saturated fatty acids ratio (U/S) was compatible with changes in membrane fluidity. These results suggest that the change in fatty acid composition of erythrocyte ghosts contributes significantly to the decreased membrane fluidity detected with DPyP in diabetic SHR.
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Affiliation(s)
- Ismael H Pérez-Hernández
- Unidad de Biomedicina, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Av de los Barrios No 1 Los Reyes Iztacala, CP 54090 Tlalnepantla, Estado de México, Mexico
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91
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Tai WY, Yang YC, Lin HJ, Huang CP, Cheng YL, Chen MF, Yen HL, Liau I. Interplay between structure and fluidity of model lipid membranes under oxidative attack. J Phys Chem B 2010; 114:15642-9. [PMID: 21053974 DOI: 10.1021/jp1014719] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A proper regulation of membrane fluidity is critical for cellular activities such as communication between cells, mitosis, and endocytosis. Unsaturated lipids, a main component of biological membranes, are particularly susceptible to oxidative attack of reactive oxygen species. The oxidation of lipids can produce structural derangement of membranes and eventually alter the membrane fluidity. We have applied fluorescence correlation spectroscopy (FCS) and Raman spectroscopy to investigate the fluidity and structure of model membranes subject to oxidative attack. Hydrogen peroxide has little effect on the lateral fluidity of membranes, whereas hydroxyl radical causes a significantly increased fluidity. The latter is rationalized with the cleavage of the acyl chains of lipids caused by hydroxyl radical; this interpretation is founded on the diminished intensities of lines in Raman spectra associated with -CH(2) and C═C moieties in lipids and supported by mass-spectral measurements. The same approach provides a mechanistic account of the inhibitory capability of vitamins C and E against the increased membrane fluidity resulting from an oxidative attack. Membranes with much cholesterol exhibit a novel resistance against altered membrane fluidity induced with oxidative attack; this finding has biological implications. Our approach combining FCS and Raman measurements reveals the interplay between the structure and fluidity of membranes and provides insight into the pathophysiology of cellular oxidative injury.
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Affiliation(s)
- Wan-Yu Tai
- Department of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University, Hsinchu 300, Taiwan
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92
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Effects of weight loss on erythrocyte membrane composition and fluidity in overweight and moderately obese women. J Nutr Biochem 2010; 22:388-92. [PMID: 20619626 DOI: 10.1016/j.jnutbio.2010.03.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2009] [Revised: 03/05/2010] [Accepted: 03/09/2010] [Indexed: 11/23/2022]
Abstract
A previous study showed chemical and physical impairment of the erythrocyte membrane of overweight and moderately obese women. The present study investigated the effects of a low-calorie diet (800 kcal/day deficit for 8 weeks) on erythrocyte membrane properties in 70 overweight and moderately obese (body mass index, 25-33 kg/m(2)) normotensive, nondiabetic women. At the end of dietary intervention, 24.3% of women dropped out, 45.7% lost less than 5% of their initial weight (Group I) and only 30% of patients lost at least 5% of their initial body weight (Group II). Group I showed no significant changes in erythrocyte membrane composition and function. The erythrocyte membranes of Group II showed significant reductions in malondialdehyde, lipofuscin, cholesterol, sphingomyelin, palmitic acid and nervonic acid and an increase in di-homo-γ-linolenic acid, arachidonic acid and membrane fluidity. Moreover, Group II showed an improvement in total cholesterol, low-density lipoprotein cholesterol, glycemia and insulin resistance. These changes in erythrocyte membrane composition could reflect a virtuous cycle resulting from the reduction in insulin resistance associated with increased membrane fluidity that, in turn, results in a sequence of metabolic events that concur to further improve membrane fluidity.
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93
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Portier K, de Moffarts B, Fellman N, Kirschvink N, Motta C, Letellierw C, Ruelland A, van Erck E, Lekeux P, Couder J. The effects of dietary N-3 and antioxidant supplementation on erythrocyte membrane fatty acid composition and fluidity in exercising horses. Equine Vet J 2010:279-84. [PMID: 17402432 DOI: 10.1111/j.2042-3306.2006.tb05553.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
REASONS FOR PERFORMING STUDY Fatty acid supplementation could modulate erythrocyte membrane fluidity in horses at rest and during exercise, but information is lacking on the effect of exercise. OBJECTIVES To assess the effect of exercise with, and without, an oral antioxidant supplementation enriched with n-3 fatty acids on erythrocyte membrane fluidity (EMF) and fatty acid composition in eventing horses. METHODS Twelve healthy and regularly trained horses were divided randomly into 2 groups: group S received an oral antioxidant cocktail enriched in n-3 fatty acid (alphatocopherol, eicosapentaenoic acid [EPA] and docosahexaenoic acid [DHA]) whereas group P was placebo-treated. At the end of 4 weeks, all horses performed a standardised exercise test (ET) under field conditions. Venous blood was sampled before starting treatment (TO), immediately before (T1) as well as 15 min (T2) and 24 h (T3) after ET. Spin labelled (16-DOXYL-stearic acid) red blood cell membranes were characterised using the relaxation correlation time (Tc in inverse proportion to EMF). Fatty acid composition (%) of the membrane was determined by gas-liquid chromatography. RESULTS Supplementation did not induce changes in EMF (T1 vs. TO) but significant changes in membrane composition were observed and there were increases in n-3 polyunsaturated fatty acid PUFA, n-3/n-6 ratio, and total n-3 fatty acids. Exercise (T2 vs. T1) induced a significant decrease of EMF in group P (Tc: +19%, P<0.05) and nonsignificant decrease in group S (Tc: +5%), whereas membrane fatty acid composition did not change in either group. During the recovery period (T3 vs. T2), EMF decreased significantly in group S (Tc: +29%, P<0.05) and nonsignificantly in group P (Tc: +18%) without any significant changes in fatty acid composition. CONCLUSION AND POTENTIAL RELEVANCE An enriched oral antioxidant supplementation induced changes in membrane composition, which modulated the decrease in EMF induced by exercise. Long chain n-3 fatty acid supplementation might therefore be beneficial.
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Affiliation(s)
- K Portier
- Equine Department, National Veterinary School of Lyon; tDepartment for Functional Sciences, Faculty of Veterinary Medicine, University of Liege, Belgium
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94
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Tsuda K. Oxidative stress and membrane fluidity of red blood cells in hypertensive and normotensive men: an electron spin resonance investigation. Int Heart J 2010; 51:121-4. [PMID: 20379046 DOI: 10.1536/ihj.51.121] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Recent evidence indicates that oxidative stress might actively participate in the pathophysiology of hypertension, atherosclerosis, and other cardiovascular diseases. The purpose of the present study was to assess the possible link between oxidative stress and membrane fluidity in hypertensive and normotensive men. We measured the membrane fluidity (a reciprocal value of membrane microviscosity) of red blood cells (RBCs) in hypertensive and normotensive men using an electron spin resonance (ESR) and spin-labeling method. Membrane fluidity of RBCs was decreased in hypertensive men compared with normotensive men. The levels of plasma 8-Iso-prostaglandin F2alpha (8-Iso-PG F2alpha : an index of oxidative stress) were significantly higher in hypertensive men than in normotensive men. In contrast, plasma nitric oxide (NO)-metabolite levels were significantly lower in hypertensive men than in normotensive men. In the overall analysis of hypertensive and normotensive men, plasma 8-Iso-PG F2alpha levels were inversely correlated with plasma NO-metabolites. Furthermore, the reduced membrane fluidity of RBCs was associated with increased plasma 8-Iso-PG F2alpha and decreased plasma NO-metabolite levels. In a multivariate regression analysis, plasma 8-Iso-PG F2alpha was found to be an independent determinant of membrane fluidity of RBCs. The results of the present study suggest that oxidative stress might have a close correlation with the rheologic behavior of RBCs and the microcirculation in hypertensive men.
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Affiliation(s)
- Kazushi Tsuda
- Cardiovascular and Metabolic Research Center, Kansai University of Health Sciences, Kumatori-cho, Sennan-gun, Osaka, Japan
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95
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Statin Use is Associated with a Significant Reduction in Cholesterol Content of Erythrocyte Membranes. A Novel Pleiotropic Effect? Cardiovasc Drugs Ther 2009; 23:471-80. [DOI: 10.1007/s10557-009-6202-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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96
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Block RC, Harris WS, Pottala JV. Determinants of Blood Cell Omega-3 Fatty Acid Content. ACTA ACUST UNITED AC 2008; 1:1-6. [PMID: 19953197 DOI: 10.2174/1875318300801010001] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
BACKGROUND: Although red blood cell eicosapentaenoic acid (EPA) plus docosahexaenoic acid (DHA) content (the Omega-3 Index) predicts cardiovascular death, the factors determining the Index are unknown. METHODS: In 704 outpatients, we undertook an investigation of the clinical determinants of the Index. RESULTS: Factors associated with the Index in decreasing order were: EPA+DHA supplement use, fish consumption frequency, triglyceride level, age, high cholesterol history, and smoking. These factors explained 59% of Index variability, with capsules/fish intake together accounting for 47%. The Index increased by 13% (p< 0.0001) for each serving level increase in fish intake and EPA+DHA supplementation correlated with a 58% increase (p< 0.0001) regardless of background fish intake (p=0.25; test for interaction). A 100 mg/dL decrease in serum triglycerides was associated with a 15% higher (p<0.0001) Index. CONCLUSIONS: The intake of EPA+DHA-rich foods and supplements principally determined the Omega-3 Index, but explained only about half of the variability.
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Affiliation(s)
- Robert C Block
- Division of Epidemiology, Department of Community and Preventive Medicine, University of Rochester School of Medicine and Dentistry
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97
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Tziakas DN, Chalikias GK, Tentes IK, Stakos D, Chatzikyriakou SV, Mitrousi K, Kortsaris AX, Kaski JC, Boudoulas H. Interleukin-8 is increased in the membrane of circulating erythrocytes in patients with acute coronary syndrome. Eur Heart J 2008; 29:2713-22. [DOI: 10.1093/eurheartj/ehn382] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
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98
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Motta S, Letellier C, Ropert M, Motta C, Thiébault JJ. Protecting effect of vitamin E supplementation on submaximal exercise-induced oxidative stress in sedentary dogs as assessed by erythrocyte membrane fluidity and paraoxonase-1 activity. Vet J 2008; 181:288-95. [PMID: 18479950 DOI: 10.1016/j.tvjl.2008.03.013] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2007] [Revised: 03/08/2008] [Accepted: 03/19/2008] [Indexed: 10/22/2022]
Abstract
The aim of this placebo-controlled study was to investigate the effects of oral vitamin E supplementation for 10 weeks on exercise-induced oxidative damage in untrained dogs. Eight dogs were randomly assigned to a supplementation (n=4) or control (n=4) group and underwent two isolated submaximal exercise sessions, 10 weeks apart. Blood was collected during each session to measure erythrocyte membrane fluidity (EMF), paraoxonase-1 (PON1) activity, plasma malondialdehyde (MDA) and vitamin E concentrations. These biomarkers were measured in venous blood samples collected before (t(0)), just after (t, EMF only) and 1d (t+1d) and 7d (t+7d) after the dogs ran on a treadmill. Prior to vitamin E supplementation, exercise induced a significant decrease in PON1 activity, EMF, vitamin E concentration and a significant increase in MDA concentration at t+1d. After a 10 week vitamin E supplementation period, these exercise-induced changes in PON1 activity, EMF and MDA concentration were still significant in the control group, but not in the supplemented group. These results suggested that vitamin E supplementation had a protective effect on submaximal exercise-induced oxidative damage in sedentary dogs.
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Affiliation(s)
- S Motta
- Physiology and Therapeutic Department, National Veterinary School of Lyon, 1, Avenue Bourgelat, 69280 Marcy l'Etoile, France
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99
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Oxidative state and lipid composition of plasma from overweight and moderately obese women. MEDITERRANEAN JOURNAL OF NUTRITION AND METABOLISM 2008. [DOI: 10.1007/s12349-008-0003-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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100
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Chang LC, Chang YY, Gau CS. Interfacial properties of Pluronics and the interactions between Pluronics and cholesterol/DPPC mixed monolayers. J Colloid Interface Sci 2008; 322:263-73. [PMID: 18377918 DOI: 10.1016/j.jcis.2008.02.051] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2007] [Revised: 02/26/2008] [Accepted: 02/26/2008] [Indexed: 11/28/2022]
Abstract
Pluronics are triblock copolymers of poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (PEO-PPO-PEO) with wide range of hydrophilic-lipophilic balance. In order to investigate the relationship between the chemical structures of Pluronics and the interfacial properties at the air-water interface by monolayer techniques, Pluronics L61, P65, F68, P84, P123, L35, and P105 were selected. Since cholesterol influenced substantially the molecular packing stage and the characteristics of cell membranes, the interactions between Pluronics and model cell membranes in the absence and presence of cholesterol were compared. The results of pi-A isotherms and surface elasticities of Pluronic monolayers indicated that the first and second transition like stage were mainly affected by the numbers of EO and PO monomers, respectively. Pluronics with higher hydrophobicities demonstrated larger surface activities and penetration abilities to dipalmitoylphosphatidylcholine (DPPC) monolayers, which might be due to hydrophobic interactions and van der Waals forces. In the presence of cholesterol, hydrogen bonding effects was supposed to exist between the 3beta-hydroxy group of cholesterol and ether oxygen of PEO chains, which led Pluronic F68, with the longest PEO chain herein, to exhibit significantly higher penetration ability. Our findings proposed a theoretical basis for selection of optimized drug carriers and the starting point for further investigations.
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Affiliation(s)
- Lin-Chau Chang
- School of Pharmacy, College of Medicine, National Taiwan University, Taipei, Taiwan
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