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Nikrad N, Sarghein MG, Abbasalizad Farhangi M. Thylakoid supplementation and hunger and fullness perception: a systematic review and dose-response meta-analysis of randomized controlled trials. Nutr Rev 2024:nuae012. [PMID: 38518202 DOI: 10.1093/nutrit/nuae012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/24/2024] Open
Abstract
CONTEXT It has been suggested that thylakoid supplementation could be associated with favorable changes in appetite. However, the present trials are inconsistent. OBJECTIVE This systematic review and meta-analysis aimed to investigate whether thylakoid supplementation is effective in hunger/fullness changes. DATA SOURCES A comprehensive literature search was performed before conducting a systematic search in PubMed, Scopus, and ISI Web of Sciences databases up to May 2023. DATA EXTRACTION Of the 262 articles found, 5 articles that measured hunger fullness expressed as ratings on the visual analog scale (VAS) for appetite analyses were selected and thoroughly examined. Relevant information, such as the authors' names, year of publication, country of origin, study design, number and status of participants, intervention dosage and type, study duration, assay used, and key findings, was extracted from these articles. The Jadad scale was used to evaluate the quality of studies. DATA ANALYSIS The data were obtained using STATA version 13 (StataCorp). Effect sizes were reported as weighted mean differences (WMDs) and 95% confidence intervals (CIs). Subgroup analyses were performed to estimate whether the effects of thylakoid supplementation on hunger and fullness varied according to dose, intervention duration, baseline population age and body mass index, baseline hunger and fullness, total sample size, and study quality. Fractional polynomial modeling was carried out to estimate time- and dose-response meta-analysis of the association between thylakoid and satiety and fullness. The meta-analysis also suggests a significant association between the combination of thylakoids with meals and reduced hunger (WMD: -2.415 mm; 95% CI: -3.544, -1.287; P < 0.001) and increased fullness (WMD: +4.602 mm; 95% CI: 2.356, 6.848; P < 0.001). Further analysis showed that thylakoid supplementation with 2 doses of 5 g/day (P = 0.002) and 7.4 g/day (P = 0.021) is more effective in reducing the feeling of hunger during an intervention of less than 56 days (P < 0.001) and with a lower level of hunger (VAS <45 mm, P < 0.001). Furthermore, a significant increase in the perception of fullness was found at a duration of less than 84 days (P < 0.001) and baseline fullness of more than 45 mm (P < 0.001). CONCLUSIONS Supplementation with thylakoid shows favorable effects on reducing hunger and increasing fullness during a shorter intervention duration. Further trials are required to shed light on this relationship. SYSTEMATIC REVIEW REGISTRATION PROSPERO registration no. CRD42023432429.
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Affiliation(s)
- Negin Nikrad
- Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
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Rahati S, Kamalinezhad M, Ebrahimi A, Eshraghian M, Pishva H. Accelerated wound healing induced by spinach extract in experimental model diabetic rats with streptozotocin. Sci Rep 2023; 13:14933. [PMID: 37696865 PMCID: PMC10495437 DOI: 10.1038/s41598-023-42033-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Accepted: 09/04/2023] [Indexed: 09/13/2023] Open
Abstract
Patients with diabetes often have difficult-to-heal wounds. Spinacia oleracea extract comprises anti-inflammatory and anti-oxidative compounds; this research, therefore, studied the impact of Spinacia oleracea extracts on ulcer regeneration. This study was conducted on 72 adult Wistar rats (200 [Formula: see text] 20 g). They were randomly divided into six groups of twelve. A: Diabetic group receiving normal saline. B: Non-diabetic group receiving normal saline. C: Diabetic group receiving spinach aqueous extract. D: Diabetic group receiving spinach alcoholic extract. E: preventive group that received aqueous extract for 2 months. F: preventive group that received alcoholic extract for 2 months. Ulcer regeneration, vascular endothelium growth factor, blood sugar, and weight changes were measured on days 3, 7, 14, 21, and 30. Macroscopic investigation of the wounds non-diabetic control group, diabetic group, as well as spinach aqueous and alcoholic extract groups, were compared and there were significant changes (P < 0.05). Pathologic examination in the spinach aqueous and alcoholic extract groups, and nondiabetic group than in the diabetic group revealed significant advances (P < 0.05). On the third and seventh days, Vascular endothelium growth factor detected significant differences between groups (P < 0.05). Results indicate that, in regenerating diabetic ulcers, Spinacia oleracea may be effective. It influences the ulcer structure and speed.
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Affiliation(s)
- Sara Rahati
- Department of Cellular - Molecular Nutrition, School of Nutrition Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran
- Department of Nutrition, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran
| | | | - Abdolali Ebrahimi
- Department of Pathology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammadreza Eshraghian
- Department of Epidemiology and Biostatistic, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Hamideh Pishva
- Department of Cellular - Molecular Nutrition, School of Nutrition Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran.
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Hendriksen RB, van der Gaag EJ. Effect of a dietary intervention including minimal and unprocessed foods, high in natural saturated fats, on the lipid profile of children, pooled evidence from randomized controlled trials and a cohort study. PLoS One 2022; 17:e0261446. [PMID: 34986194 PMCID: PMC8730453 DOI: 10.1371/journal.pone.0261446] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Accepted: 11/19/2021] [Indexed: 11/18/2022] Open
Abstract
Aim To study the possible effects of a dietary intervention with minimal and unprocessed foods, high in natural saturated fats on the lipid profile and body mass index of children. Method This study combines three intervention studies; one non-randomized retrospective cohort study and two randomized controlled trials, to a pooled analysis. The intervention group received a dietary intervention of minimal and unprocessed foods for three to six months, consisting of five times per week green vegetables, three times per week beef, daily 200–300 mL whole cow’s milk (3.4% fat) and whole dairy butter (80% fat) on each slice of bread. The control group continued their usual dietary habits. Raw data of the three intervention studies where combined into one single dataset for data analysis, using mixed effects analysis of covariance to test the effects of the dietary advice on the main study outcomes, which are measurements of the lipid profile. Results In total, 267 children aged 1 to 16 years were followed. 135 children were included in the intervention group and 139 children in the control group. Characteristics (age, gender and follow-up period) were equally distributed between the groups at baseline. In the intervention group HDL-cholesterol increased significantly from 1.22 mmol/L, 95% confidence interval (CI) 1.14–1.32 to 1.42 mmol/L 95% CI 1.30–1.65 (p = 0.007). The increase over time in HDL cholesterol in the intervention group was significantly different compared to the increase in the control group (from 1.26 mmol/L, 95% CI 1.19–1.35, to 1.30 mmol/L, 95% CI 1.26–1.37) (p = 0.04). Due to the increased HDL concentration in the intervention group, the total cholesterol/HDL cholesterol ratio decreased significantly from 3.70 mmol/L, 95% CI 3.38–3.87, to 3.25 mmol/L, 95% CI 2.96–3.31 (p = 0.05). Conclusion Consumption of minimal and unprocessed foods (high in natural saturated fats) has favourable effects on HDL cholesterol in children. Therefore, this dietary advice can safely be recommended to children.
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Affiliation(s)
- Rosanne Barbra Hendriksen
- MSc Nutrition and Health, Wageningen University and Research (WUR), Wageningen, The Netherlands
- * E-mail:
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Kergomard J, Carrière F, Barouh N, Villeneuve P, Vié V, Bourlieu C. Digestibility and oxidative stability of plant lipid assemblies: An underexplored source of potentially bioactive surfactants? Crit Rev Food Sci Nutr 2021:1-20. [PMID: 34839771 DOI: 10.1080/10408398.2021.2005532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Most lipids in our diet come under the form of triacylglycerols that are often redispersed and stabilized by surfactants in processed foods. In plant however, lipid assemblies constitute interesting sources of natural bioactive and functional ingredients. In most photosynthetic sources, polar lipids rich in ω3 fatty acids are concentrated. The objective of this review is to summarize all the knowledge about the physico-chemical composition, digestive behavior and oxidative stability of plant polar lipid assemblies to emphasize their potential as functional ingredients in human diet and their potentialities to substitute artificial surfactants/antioxidants. The specific composition of plant membrane assemblies is detailed, including plasma membranes, oil bodies, and chloroplast; emphasizing its concentration in phospholipids, galactolipids, peculiar proteins, and phenolic compounds. These molecular species are hydrolyzed by specific digestive enzymes in the human gastrointestinal tract and reduced the hydrolysis of triacylglycerols and their subsequent absorption. Galactolipids specifically can activate ileal break and intrinsically present an antioxidant (AO) activity and metal chelating activity. In addition, their natural association with phenolic compounds and their physical state (Lα state of digalactosyldiacylglycerols) in membrane assemblies can enhance their stability to oxidation. All these elements make plant membrane molecules and assemblies very promising components with a wide range of potential applications to vectorize ω3 polyunsaturated fatty acids, and equilibrate human diet.
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Affiliation(s)
- Jeanne Kergomard
- INRAE/UM/Institut Agro, UMR 1208 IATE, Montpellier France.,IPR Institute of Physics, UMR UR1 CNRS 6251, Rennes 1 University, Rennes, France
| | - Frédéric Carrière
- Aix Marseille Université, CNRS, UMR7281 Bioénergétique et lngénierie des Protéines, Marseille, France
| | | | | | - Véronique Vié
- IPR Institute of Physics, UMR UR1 CNRS 6251, Rennes 1 University, Rennes, France
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Erlanson-Albertsson C, Stenkula KG. The Importance of Food for Endotoxemia and an Inflammatory Response. Int J Mol Sci 2021; 22:ijms22179562. [PMID: 34502470 PMCID: PMC8431640 DOI: 10.3390/ijms22179562] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 08/23/2021] [Accepted: 08/30/2021] [Indexed: 11/16/2022] Open
Abstract
Bacterial endotoxin is a potent inflammatory antigen abundant in the human intestine. Endotoxins circulate in the blood at low concentrations in all healthy individuals. Elevated levels of circulatory endotoxins may cause inflammation with the development of chronic disease, either affecting metabolism, neurological disease, or resistance to viral and bacterial infections. The most important endotoxin is LPS, being a superantigen. In this narrative review, the effect of various food components to postprandially elevate circulating LPS and inflammatory markers is described. There is evidence that the intake of food enriched in fat, in particular saturated fat, may elevate LPS and pro-inflammatory markers. This occurs in both normal-weight and obese subjects. In obese subjects, inflammatory markers are already elevated before meal consumption. The importance of food choice for endotoxemia and inflammatory response is discussed.
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Affiliation(s)
- Charlotte Erlanson-Albertsson
- Appetite Control, Department of Experimental Medical Science, BMC, Lund University, 221 84 Lund, Sweden
- Correspondence: ; Tel.: +46-46-222-85-89 or +46-70-301-12-25
| | - Karin G. Stenkula
- Glucose Transport and Protein Trafficking, Department of Experimental Medical Science, BMC, Lund University, 221 84 Lund, Sweden;
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Amirinejad A, Totmaj AS, Mardali F, Hekmatdoost A, Emamat H, Safa M, Shidfar F. Administration of hydro-alcoholic extract of spinach improves oxidative stress and inflammation in high-fat diet-induced NAFLD rats. BMC Complement Med Ther 2021; 21:221. [PMID: 34479550 PMCID: PMC8418034 DOI: 10.1186/s12906-021-03396-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Accepted: 08/17/2021] [Indexed: 12/19/2022] Open
Abstract
Background Nonalcoholic fatty liver disease (NAFLD) is the most common liver disease worldwide. The aim of this study was to evaluate the effects of hydro-alcoholic extract of spinach (HES) on hepatic and serum measurements of NAFLD in a rat model. Methods In the prevention phase, 18 Sprague–Dawley rats were fed a high-fat diet, a high-fat diet plus 400 mg/kg HES, or a chow diet for seven weeks. For the treatment phase, after the induction of NAFLD, they were fed a high-fat diet, a high-fat diet plus 400 mg/kg HES, a chow diet, or a chow diet plus 400 mg/kg HES for four weeks (n = 6). Results Administration of HES combined with high-fat diet in rats was associated with decreased food intake (P < 0.01), weight loss (P = 0.01), and increased superoxide dismutase (SOD) (P = 0.02) enzyme activity in the liver, at the end of the prevention phase. hs-CRP (P < 0.05), PTX-3 (P < 0.05), and TNF-α (P < 0.05) gene expression in the liver were decreased and PPAR-γ (P < 0.05) gene expression in the liver was increased by spinach intake, both in the prevention and treatment phases. Furthermore, administration of spinach in the treatment phase increased serum TAC (P = 0.03) and hepatic GPX (P = 0.01) enzyme activity. Conclusion Taking into account the potential beneficial effects of HES on prevention and treatment of NAFLD in the present study, to confirm these findings, we propose that further clinical trials be conducted on human subjects with NAFLD. Supplementary Information The online version contains supplementary material available at 10.1186/s12906-021-03396-x.
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Affiliation(s)
- Ali Amirinejad
- Department of Nutrition, School of Public Health, Iran University of Medical Sciences, Tehran, 1449614535, Iran
| | - Ali Saneei Totmaj
- Department of Nutrition, School of Public Health, Iran University of Medical Sciences, Tehran, 1449614535, Iran
| | - Farzaneh Mardali
- Department of Nutrition, School of Public Health, Iran University of Medical Sciences, Tehran, 1449614535, Iran
| | - Azita Hekmatdoost
- Department of Clinical Nutrition and Dietetics, Faculty of Nutrition and Food Technology, National Nutrition and Food Technology, Research Institute, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hadi Emamat
- Student Research Committee, Department of Clinical Nutrition and Dietetics, Faculty of Nutrition and Food Technology, National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Majid Safa
- Department of Hematology and Blood Transfusion, School of Allied Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Farzad Shidfar
- Department of Nutrition, School of Public Health, Iran University of Medical Sciences, Tehran, 1449614535, Iran.
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Pourteymour Fard Tabrizi F, Abbasalizad Farhangi M, Vaezi M, Hemmati S. Changes of body composition and circulating neopterin, omentin-1, and chemerin in response to thylakoid-rich spinach extract with a hypocaloric diet in obese women with polycystic ovary syndrome: A randomized controlled trial. Phytother Res 2021; 35:2594-2606. [PMID: 33368745 DOI: 10.1002/ptr.6999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 11/25/2020] [Accepted: 12/13/2020] [Indexed: 11/08/2022]
Abstract
This trial evaluated the effects of thylakoid-rich spinach extract supplementation combined with a hypocaloric diet on body composition and serum levels of neopterin, chemerin, and omentin-1 in obese women with polycystic ovary syndrome (PCOS). In this randomized controlled trial, 48 obese women with PCOS, aged 20-45 years old, were recruited and randomly divided into thylakoid (n = 24) and placebo (n = 24) groups. They received a low-calorie diet with 5 g/day thylakoid-rich spinach extract or a low-calorie diet with 5 g/day placebo for 12 weeks. The mean age of the participants of the thylakoid group was 31.86 years, and the placebo group was 32.04 years. Thylakoid-rich spinach extract supplementation with a low-calorie diet increased serum levels of omentin-1 (10.90 vs. 3.87 ng/L; p < .001) and decreased fat mass (-5.19 vs. -1.35 kg; p < .001) and serum levels of neopterin (-0.66 vs. -0.38 nmol/L; p = .003) and chemerin (-41.24 vs. -11.26 ng/L; p < .001) in the thylakoid group compared to the placebo group. A significant improvement in omentin-1, chemerin, and neopterin by thylakoid-rich spinach extract supplementation was under the influence of weight change and insulin resistance status throughout the study. A significant decrease in the other anthropometric indices and insulin resistance was also observed in the thylakoid group, compared to the placebo group (p < .001, for all parameters). Thylakoid-rich spinach extract combined with a low-calorie diet increased circulating omentin-1 and decreased fat mass, abdominal obesity, as well as circulating chemerin, neopterin, and insulin in obese women with PCOS.
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Affiliation(s)
| | - Mahdieh Abbasalizad Farhangi
- Department of Nutrition in Community, Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Maryam Vaezi
- Fellowship Gynecology-Oncology, Women's Reproductive Health Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Department of Obstetrics and Gynecology, Alzahra Teaching Hospital, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Salar Hemmati
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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Lindberg Yilmaz J, Adlercreutz P, Tullberg C. Polar Lipids Reduce In Vitro Duodenal Lipolysis Rate of Oat Oil and Liquid Oat Base Products. EUR J LIPID SCI TECH 2021. [DOI: 10.1002/ejlt.202000317] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Jenny Lindberg Yilmaz
- Division of Biotechnology, Department of Chemistry Lund University Naturvetarvägen 16 Lund SE‐221 00 Sweden
| | - Patrick Adlercreutz
- Division of Biotechnology, Department of Chemistry Lund University Naturvetarvägen 16 Lund SE‐221 00 Sweden
| | - Cecilia Tullberg
- Division of Biotechnology, Department of Chemistry Lund University Naturvetarvägen 16 Lund SE‐221 00 Sweden
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Sahaka M, Amara S, Wattanakul J, Gedi MA, Aldai N, Parsiegla G, Lecomte J, Christeller JT, Gray D, Gontero B, Villeneuve P, Carrière F. The digestion of galactolipids and its ubiquitous function in Nature for the uptake of the essential α-linolenic acid. Food Funct 2020; 11:6710-6744. [PMID: 32687132 DOI: 10.1039/d0fo01040e] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Galactolipids, mainly monogalactosyl diglycerides and digalactosyl diglycerides are the main lipids found in the membranes of plants, algae and photosynthetic microorganisms like microalgae and cyanobacteria. As such, they are the main lipids present at the surface of earth. They may represent up to 80% of the fatty acid stocks, including a large proportion of polyunsaturated fatty acids mainly α-linolenic acid (ALA). Nevertheless, the interest in these lipids for nutrition and other applications remains overlooked, probably because they are dispersed in the biomass and are not as easy to extract as vegetable oils from oleaginous fruit and oil seeds. Another reason is that galactolipids only represent a small fraction of the acylglycerolipids present in modern human diet. In herbivores such as horses, fish and folivorous insects, galactolipids may however represent the main source of dietary fatty acids due to their dietary habits and digestion physiology. The development of galactolipase assays has led to the identification and characterization of the enzymes involved in the digestion of galactolipids in the gastrointestinal tract, as well as by microorganisms. Pancreatic lipase-related protein 2 (PLRP2) has been identified as an important factor of galactolipid digestion in humans, together with pancreatic carboxyl ester hydrolase (CEH). The levels of PLRP2 are particularly high in monogastric herbivores thus highlighting the peculiar role of PLRP2 in the digestion of plant lipids. Similarly, pancreatic lipase homologs are found to be expressed in the midgut of folivorous insects, in which a high galactolipase activity can be measured. In fish, however, CEH is the main galactolipase involved. This review discusses the origins and fatty acid composition of galactolipids and the physiological contribution of galactolipid digestion in various species. This overlooked aspect of lipid digestion ensures not only the intake of ALA from its main natural source, but also the main lipid source of energy for growth of some herbivorous species.
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Affiliation(s)
- Moulay Sahaka
- Aix Marseille Univ, CNRS, UMR7281 Bioénergétique et Ingénierie des Protéines, 31 Chemin Joseph Aiguier, 13009 Marseille, France.
| | - Sawsan Amara
- Lipolytech, Zone Luminy Biotech, 163 avenue de Luminy, 13288 Marseille Cedex 09, France
| | - Jutarat Wattanakul
- Division of Food, Nutrition and Dietetics, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire, LE12 5RD, UK
| | - Mohamed A Gedi
- Division of Food, Nutrition and Dietetics, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire, LE12 5RD, UK
| | - Noelia Aldai
- Lactiker Research Group, Department of Pharmacy & Food Sciences, University of the Basque Country (UPV/EHU), 01006 Vitoria-Gasteiz, Spain
| | - Goetz Parsiegla
- Aix Marseille Univ, CNRS, UMR7281 Bioénergétique et Ingénierie des Protéines, 31 Chemin Joseph Aiguier, 13009 Marseille, France.
| | | | - John T Christeller
- The New Zealand Institute for Plant and Food Research Ltd (Plant & Food Research), Palmerston North Research Centre, Palmerston North, New Zealand
| | - David Gray
- Division of Food, Nutrition and Dietetics, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire, LE12 5RD, UK
| | - Brigitte Gontero
- Aix Marseille Univ, CNRS, UMR7281 Bioénergétique et Ingénierie des Protéines, 31 Chemin Joseph Aiguier, 13009 Marseille, France.
| | | | - Frédéric Carrière
- Aix Marseille Univ, CNRS, UMR7281 Bioénergétique et Ingénierie des Protéines, 31 Chemin Joseph Aiguier, 13009 Marseille, France.
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Tabrizi FPF, Farhangi MA, Vaezi M, Hemmati S. The effects of spinach-derived thylakoid supplementation in combination with calorie restriction on anthropometric parameters and metabolic profiles in obese women with polycystic ovary syndrome: a randomized, double-blind, placebo-controlled clinical trial. Nutr J 2020; 19:82. [PMID: 32782010 PMCID: PMC7422584 DOI: 10.1186/s12937-020-00601-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 08/06/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND There is a promising outlook regarding the potential effect of spinach-derived thylakoids in the management of obesity and its associated metabolic disturbances. This research aimed to evaluate the effects of spinach-derived thylakoids supplementation combined with a calorie-restricted diet on anthropometric and metabolic profiles in obese women with the polycystic ovary syndrome (PCOS). METHODS In a 12-week double-blind placebo-controlled randomized clinical trial, 48 females with obesity and PCOS were randomly allocated into either intervention (5 g/day thylakoid) or placebo (5 g/day cornstarch) groups along with calorie-restricted diets. Anthropometric measures, physical activity levels, dietary intakes, insulin resistance markers, as well as serum levels of insulin, fasting blood glucose (FBG), non-esterified fatty acids (NEFA), and sex hormones including dehydroepiandrosterone sulfate (DHEAS), follicle-stimulating hormone (FSH), luteinizing hormone (LH), sex hormone-binding globulin (SHBG), and free androgen index (FAI) were evaluated pre-and post-intervention. RESULTS After the 12-week intervention, there were significant decreases in weight (- 6.97 ± 0.52 vs. -3.19 ± 0.72 kg; P < 0.001), waist circumference (- 7.78 ± 2.50 vs. -3.73 ± 1.40 cm; P < 0.001), fat mass (- 5.19 ± 0.53 vs. -1.36 ± 0.39 kg; P < 0.001), and insulin levels (- 5.40 ± 1.86 vs. -1.19 ± 0.85 μU/mL; P < 0.001) in the spinach-derived thylakoid group compared to the placebo group. Furthermore, insulin resistance markers and serum levels of testosterone decreased significantly in the thylakoid group compared to the placebo group (P < 0.05). The changes in other parameters did not show significant differences between the two groups. CONCLUSIONS Spinach-derived thylakoid supplementation resulted in more favorable improvements in anthropometric indices and insulin sensitivity compared to the calorie restriction alone. TRIAL REGISTRATION The study was approved by the Ethics Committee of Research Vice-chancellor of Tabriz University of Medical Sciences, Tabriz, Iran, and was registered in the Iranian Registry of Clinical Trials (registration ID: IRCT20140907019082N9 ).
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Affiliation(s)
| | - Mahdieh Abbasalizad Farhangi
- Drug Applied Research Center, Tabriz University of Medical Sciences, Attar-neishabouri Ave, Golgasht St, Tabriz, 5165665931, Iran.
| | - Maryam Vaezi
- Women's Reproductive Health Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Department. of Obstetrics and Gynecology, Alzahra Teaching Hospital, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Salar Hemmati
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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Amirinejad A, Heshmati J, Shidfar F. Effects of thylakoid intake on appetite and weight loss: a systematic review. J Diabetes Metab Disord 2020; 19:565-73. [PMID: 32550209 DOI: 10.1007/s40200-019-00443-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Accepted: 09/11/2019] [Indexed: 02/06/2023]
Abstract
Background Previous studies have shown thylakoids, the membrane proteins which are extracted from green leaves like spinach, can induce satiety through homeostatic and non-homeostatic pathways. In this study, we reviewed the current human literature on thylakoids' characteristics and their relationship to satiety regulation and weight loss. Methods A systematic search of literature published between January 1990 and May 2019 was conducted on the electronic databases; including WEB OF SCIENCE, Cochrane Library, MEDLINE, Scopus, and EMBASE databases. We included all clinical trials that addressed the effects of thylakoids or chloroplast intake on satiety and weight loss. Results After excluding non-human studies, non-RCTs, duplications, studies with irrelevant data and interventions, eight studies were included in the qualitative synthesis. All studies supported this hypothesis that thylakoids reduce the feeling of hunger by increasing postprandial cholecystokinin and leptin and decreasing serum ghrelin, but the consequences of thylakoid intake on anthropometric characteristics were controversial. Conclusion In conclusion, our results may approve this postulation that receiving a thylakoid-enriched meal can decrease appetite and probably food intake in short term; however, more studies are needed to explore the effects of long term supplementation with thylakoids on weight loss in human subjects.
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Östbring K, Sjöholm I, Rayner M, Erlanson-Albertsson C. Effects of Storage Conditions on Degradation of Chlorophyll and Emulsifying Capacity of Thylakoid Powders Produced by Different Drying Methods. Foods 2020; 9:foods9050669. [PMID: 32455958 PMCID: PMC7278877 DOI: 10.3390/foods9050669] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 05/15/2020] [Accepted: 05/19/2020] [Indexed: 11/16/2022] Open
Abstract
Thylakoid membranes isolated from spinach have previously been shown to inhibit lipase/co-lipase and prolong satiety in vivo. There is a need to develop thylakoid products that not only have the desired characteristics and functionality after processing, but also are stable and provide equivalent effect on appetite over the promised shelf life. The aim of the present study was therefore to evaluate how the thylakoid powders' characteristics and functionality were affected by moisture during storage. Thylakoids produced by drum-drying, spray-drying, and freeze-drying were incubated in controlled atmosphere with different relative humidity (10 RH%, 32 RH%, 48 RH% and 61 RH%) for 8 months. The water content in all powders was increased during storage. The water absorption was moisture-dependent, and the powders were considered hygroscopic. Relative humidity showed a definite influence on the rate of chlorophyll degradation and loss of green color in thylakoid powders after storage which correlated with impaired emulsifying capacity. Spray-dried powder had the overall highest chlorophyll content and emulsifying capacity at all RH-levels investigated. Spray drying was therefore considered the most suitable drying method yielding a powder with best-maintained functionality after storage. The results can be applied towards quality control of high-quality functional foods with appetite suppressing abilities.
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Affiliation(s)
- Karolina Östbring
- Department of Food Technology, Engineering and Nutrition, Lund University, 221 00 Lund, Sweden; (I.S.); (M.R.)
- Correspondence:
| | - Ingegerd Sjöholm
- Department of Food Technology, Engineering and Nutrition, Lund University, 221 00 Lund, Sweden; (I.S.); (M.R.)
| | - Marilyn Rayner
- Department of Food Technology, Engineering and Nutrition, Lund University, 221 00 Lund, Sweden; (I.S.); (M.R.)
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Amirinejad A, Hekmatdoost A, Ebrahimi A, Ranjbaran F, Shidfar F. The effects of hydroalcoholic extract of spinach on prevention and treatment of some metabolic and histologic features in a rat model of nonalcoholic fatty liver disease. J Sci Food Agric 2020; 100:1787-1796. [PMID: 31849065 DOI: 10.1002/jsfa.10215] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2019] [Revised: 12/16/2019] [Accepted: 12/18/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND This study evaluated the effects of hydroalcoholic extract of spinach (HES) on nonalcoholic fatty liver disease (NAFLD). In the prevention phase, 18 Sprague-Dawley rats were fed a high-fat diet, a high-fat diet plus 400 mg kg-1 HES, or a chow diet for 7 weeks. For the treatment phase, after the induction of NAFLD, they were fed a high-fat diet, a high-fat diet plus 400 mg kg-1 HES, a chow diet, or chow diet plus 400 mg kg-1 HES for 4 weeks (n = 6). RESULTS Weight gain (P = 0.01), food intake (P < 0.01), serum glucose (P = 0.01), triglyceride (TG) (P = 0.02), low-density lipoprotein cholesterol (LDL-c) (P = 0.01), aspartate aminotransferase (AST) (P = 0.02), liver steatosis, and the nonalcoholic fatty liver disease (NAFLD) activity score (NAS) (P < 0.01) in the high-fat group were statistically higher than in the other groups at the end of the prevention phase. Feeding spinach extract to rats on a high-fat diet decreased serum glucose (P = 0.01), total cholesterol (TCh) (P < 0.01), AST (P = 0.01), alkaline phosphatase (ALP) (P < 0.01), and liver steatosis (P < 0.01) in the treatment phase. CONCLUSION Overall, spinach extract showed beneficial effects in the prevention and treatment of NAFLD. © 2019 Society of Chemical Industry.
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Affiliation(s)
- Ali Amirinejad
- Department of Nutrition, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
| | - Azita Hekmatdoost
- Department of Clinical Nutrition and Dietetics, Faculty of Nutrition and Food Technology, National Nutrition and Food Technology, Research Institute, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Abdolali Ebrahimi
- Department of Pathology, Imam Hossein Hospital, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Fatemeh Ranjbaran
- School of Health Management and Information Sciences, Iran University of Medical Sciences, Tehran, Iran
| | - Farzad Shidfar
- Department of Nutrition, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
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Deligiannidou GE, Philippou E, Vidakovic M, Berghe WV, Heraclides A, Grdovic N, Mihailovic M, Kontogiorgis C. Natural Products Derived from the Mediterranean Diet with Antidiabetic Activity: from Insulin Mimetic Hypoglycemic to Nutriepigenetic Modulator Compounds. Curr Pharm Des 2020; 25:1760-1782. [PMID: 31298162 DOI: 10.2174/1381612825666190705191000] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Accepted: 06/24/2019] [Indexed: 12/17/2022]
Abstract
BACKGROUND The Mediterranean diet is a healthy eating pattern that protects against the development of Type 2 diabetes mellitus (T2DM), a metabolic disease characterized by elevated blood sugar levels due to pancreatic beta-cell functional impairment and insulin resistance in various tissues. Inspired by the ancient communities, this diet emphasizes eating primarily plant-based foods, including vegetables, legumes, fruits, cereals, and nuts. Importantly, virgin olive oil is used as the principal source of fat. Red meat is consumed in low amounts while wine and fish are consumed moderately. OBJECTIVE Here, we review the most beneficial components of the Mediterranean Diet and tentative mechanisms of action for prevention and/or management of T2DM, based on research conducted within the last decade. METHODS The references over the last five years have been reviewed and they have been selected properly according to inclusion/ exclusion criteria. RESULTS Several bioactive diet components were evaluated to prevent inflammation and cytokine-induced oxidative damage, reduce glucose concentration, carbohydrate absorption and increase insulin sensitivity and related gene expression. CONCLUSION The adherence to a healthy lifestyle, including diet, exercise and habits remains the best approach for the prevention of diabetes as well as frequent check-ups and education. Though diabetes has a strong genetic component, in recent years many reports strongly point to the critical role of lifestyle specific epigenetic modifications in the development of T2DM. It remains to be established how different components of the Mediterranean Diet interact and influence the epigenetic landscape to prevent or treat the disease.
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Affiliation(s)
- Georgia-Eirini Deligiannidou
- Laboratory of Hygiene and Environmental Protection, Department of Medicine, Democritus University of Thrace, Alexandroupolis, 68100, Greece
| | - Elena Philippou
- Department of Life and Health Sciences, University of Nicosia, Makedonitissis, Nicosia 2417, Cyprus.,Diabetes and Nutritional Sciences Division, King's College London, London, United Kingdom
| | - Melita Vidakovic
- Department of Molecular Biology, Institute for Biological Research, University of Belgrade, Bulevar despota Stefana 142, 11000 Belgrade, Serbia
| | - Wim V Berghe
- Epigenetic Signaling Lab (PPES), Department of Biomedical Sciences, University of Antwerp (UA), Wilrijk, Belgium
| | - Alexandros Heraclides
- Department of Primary Care and Population Health, University of Nicosia Medical School, Ayiou Nikolaou Street, Egkomi, Cyprus
| | - Nevena Grdovic
- Department of Molecular Biology, Institute for Biological Research, University of Belgrade, Bulevar despota Stefana 142, 11000 Belgrade, Serbia
| | - Mirjana Mihailovic
- Department of Molecular Biology, Institute for Biological Research, University of Belgrade, Bulevar despota Stefana 142, 11000 Belgrade, Serbia
| | - Christos Kontogiorgis
- Laboratory of Hygiene and Environmental Protection, Department of Medicine, Democritus University of Thrace, Alexandroupolis, 68100, Greece
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Pourteymour Fard Tabrizi F, Abbasalizad Farhangi M. A Systematic Review of the Potential Effects of Thylakoids in the Management of Obesity and Its Related Issues. Food Reviews International 2020. [DOI: 10.1080/87559129.2019.1710747] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Fatemeh Pourteymour Fard Tabrizi
- Student Research Committee, Department of Nutrition, Faculty of Nutrition and Food science, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mahdieh Abbasalizad Farhangi
- Research Center for Evidence Based Medicine, Health Management and Safety Promotion Research Institute, Tabriz University of Medical Sciences, Tabriz, Iran
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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Lim JJ, Poppitt SD. How Satiating Are the 'Satiety' Peptides: A Problem of Pharmacology versus Physiology in the Development of Novel Foods for Regulation of Food Intake. Nutrients 2019; 11:E1517. [PMID: 31277416 DOI: 10.3390/nu11071517] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 06/27/2019] [Accepted: 06/28/2019] [Indexed: 12/15/2022] Open
Abstract
Developing novel foods to suppress energy intake and promote negative energy balance and weight loss has been a long-term but commonly unsuccessful challenge. Targeting regulation of appetite is of interest to public health researchers and industry in the quest to develop ‘functional’ foods, but poor understanding of the underpinning mechanisms regulating food intake has hampered progress. The gastrointestinal (GI) or ‘satiety’ peptides including cholecystokinin (CCK), glucagon-like peptide 1 (GLP-1) and peptide YY (PYY) secreted following a meal, have long been purported as predictive biomarkers of appetite response, including food intake. Whilst peptide infusion drives a clear change in hunger/fullness and eating behaviour, inducing GI-peptide secretion through diet may not, possibly due to modest effects of single meals on peptide levels. We conducted a review of 70 dietary preload (DIET) and peptide infusion (INFUSION) studies in lean healthy adults that reported outcomes of CCK, GLP-1 and PYY. DIET studies were acute preload interventions. INFUSION studies showed that minimum increase required to suppress ad libitum energy intake for CCK, GLP-1 and PYY was 3.6-, 4.0- and 3.1-fold, respectively, achieved through DIET in only 29%, 0% and 8% of interventions. Whether circulating ‘thresholds’ of peptide concentration likely required for behavioural change can be achieved through diet is questionable. As yet, no individual or group of peptides can be measured in blood to reliably predict feelings of hunger and food intake. Developing foods that successfully target enhanced secretion of GI-origin ‘satiety’ peptides for weight loss remains a significant challenge.
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Salehi B, Tumer TB, Ozleyen A, Peron G, Dall’acqua S, Rajkovic J, Naz R, Nosheen A, Mudau FN, Labanca F, Milella L, de Tommasi N, Coutinho HD, Sharifi-rad J, Verma DR, Martorell M, Martins N. Plants of the genus Spinacia: From bioactive molecules to food and phytopharmacological applications. Trends Food Sci Technol 2019; 88:260-73. [DOI: 10.1016/j.tifs.2019.03.028] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Abstract
Nowadays, overweight and obesity are major epidemic health problems that can bring about some other health issues such as cardiovascular disease which is the first cause of mortality worldwide. Thylakoids are disc-like membranes responsible for photosynthetic light reactions in chloroplasts of green plants. Although only a few animal and human studies have been conducted regarding the impact of thylakoids on overweight- and obesity-related factors, all of them have resulted in positive outcomes. These outcomes are as follows: increment of satiety response; suppression of hunger sensations, particularly hedonic hunger; reduction of body weight and fat; promotion of glucose homeostasis; decrease in serum lipids; attenuation of oxidative stress and inflammation; and modulation of gut microbiota, notably by increasing some helpful bacteria such as Lactobacillus reuteri. It seems that some of these useful effects are related to retarded absorption of dietary fat and carbohydrate caused by thylakoids. There is still a need for more well-designed studies.
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Affiliation(s)
- Sahar Foshati
- Nutrition and Food Sciences Research Center, Department of Clinical Nutrition, School of Nutrition and Food Sciences, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Maryam Ekramzadeh
- Nutrition and Food Sciences Research Center, Department of Clinical Nutrition, School of Nutrition and Food Sciences, Shiraz University of Medical Sciences, Shiraz, Iran
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Östbring K, Sjöholm I, Sörenson H, Ekholm A, Erlanson-Albertsson C, Rayner M. Characteristics and functionality of appetite-reducing thylakoid powders produced by three different drying processes. J Sci Food Agric 2018; 98:1554-1565. [PMID: 28816350 DOI: 10.1002/jsfa.8627] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 07/17/2017] [Accepted: 08/13/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND Thylakoids, a chloroplast membrane extracted from green leaves, are a promising functional ingredient with appetite-reducing properties via their lipase-inhibiting effect. Thylakoids in powder form have been evaluated in animal and human models, but no comprehensive study has been conducted on powder characteristics. The aim was to investigate the effects of different isolation methods and drying techniques (drum-drying, spray-drying, freeze-drying) on thylakoids' physicochemical and functional properties. RESULTS Freeze-drying yielded thylakoid powders with the highest lipase-inhibiting capacity. We hypothesize that the specific macromolecular structures involved in lipase inhibition were degraded to different degrees by exposure to heat during spray-drying and drum-drying. We identified lightness (Hunter's L-value), greenness (Hunter's a-value), chlorophyll content and emulsifying capacity to be correlated to lipase-inhibiting capacity. Thus, to optimize the thylakoids functional properties, the internal membrane structure indicated by retained green colour should be preserved. This opens possibilities to use chlorophyll content as a marker for thylakoid functionality in screening processes during process optimization. CONCLUSION Thylakoids are heat sensitive, and a mild drying technique should be used in industrial production. Strong links between physicochemical parameters and lipase inhibition capacity were found that can be used to predict functionality. The approach from this study can be applied towards production of standardized high-quality functional food ingredients. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Karolina Östbring
- Department of Food Technology, Engineering and Nutrition, Faculty of Engineering, Chemical Centre, Lund University, 221 00, Lund, Sweden
| | - Ingegerd Sjöholm
- Department of Food Technology, Engineering and Nutrition, Faculty of Engineering, Chemical Centre, Lund University, 221 00, Lund, Sweden
| | - Henrietta Sörenson
- Department of Food Technology, Engineering and Nutrition, Faculty of Engineering, Chemical Centre, Lund University, 221 00, Lund, Sweden
| | - Andrej Ekholm
- Department of Experimental Medical Science, Appetite Control Unit, BMC, Lund University, 221 84, Lund, Sweden
| | | | - Marilyn Rayner
- Department of Food Technology, Engineering and Nutrition, Faculty of Engineering, Chemical Centre, Lund University, 221 00, Lund, Sweden
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20
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Matsuda H, Ooi S, Otokozawa R, Kumazaki K, Udagawa E, Asakura M, Suzuki D, Shirai T. Intake of green-plant membrane with dietary oil suppresses postprandial hypertriglyceridemia in rats via promoting excretion of bile acids. Biosci Biotechnol Biochem 2018; 82:114-119. [DOI: 10.1080/09168451.2017.1409070] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Abstract
Green-plant membrane is a phytonutrient present in green leafy vegetables at high concentration. Postprandial increases in blood triglyceride levels result in insulin resistance and type 2 diabetes. Additionally, dietary life and eating order also affect postprandial hypertriglyceridemia. In this study, the effects of once-daily intake of green-plant membrane with dietary oil on postprandial hypertriglyceridemia were investigated in vitro and in vivo. In vitro, green-plant membrane bound hydrophobic bile acids but did not inhibit pancreatic lipase activity. Following the administration, green-plant membrane with dietary oil in rats, oral fat tolerance tests, increases in serum triglycerides levels were significantly reduced. Moreover, fecal total lipid and bile acid volumes were significantly increased in rats that administered 200 mg/mL green-plant membrane. These results suggest that green-plant membrane with dietary oil inhibits dietary fat absorption via promotion of bile acid excretion in feces and the effectiveness of eating green-plant membrane, such as green leafy vegetables, with meals.
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Affiliation(s)
- Hiroko Matsuda
- Laboratory of Salad Science, Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology, Tokyo, Japan
| | - Shinpei Ooi
- Laboratory of Salad Science, Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology, Tokyo, Japan
| | - Ryo Otokozawa
- Laboratory of Salad Science, Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology, Tokyo, Japan
| | - Kodai Kumazaki
- Laboratory of Salad Science, Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology, Tokyo, Japan
| | - Eri Udagawa
- Laboratory of Salad Science, Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology, Tokyo, Japan
| | - Masaya Asakura
- Laboratory of Salad Science, Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology, Tokyo, Japan
| | - Daisuke Suzuki
- Laboratory of Salad Science, Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology, Tokyo, Japan
| | - Takaaki Shirai
- Laboratory of Salad Science, Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology, Tokyo, Japan
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Stenkula KG, Stenblom EL, Montelius C, Egecioglu E, Erlanson-Albertsson C. Thylakoids reduce body fat and fat cell size by binding to dietary fat making it less available for absorption in high-fat fed mice. Nutr Metab (Lond) 2017; 14:4. [PMID: 28096887 PMCID: PMC5225541 DOI: 10.1186/s12986-016-0160-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Accepted: 12/27/2016] [Indexed: 11/26/2022] Open
Abstract
Background Dietary thylakoids derived from spinach have beneficial effects on body fat accumulation and blood lipids as demonstrated in humans and rodents. Important mechanisms established include delayed fat digestion in the intestine, without causing steatorrhea, and increased fatty acid oxidation in intestinal cells. The objective of our study was to elucidate if increased fecal fat excretion is an important mechanism to normalize adipose tissue metabolism during high-fat feeding in mice supplemented with thylakoids. Methods Mice were randomized to receive HFD or thylHFD for 14 days (n = 14 for the control group and 16 for the thylakoid group). The effect of thylakoids on body fat distribution, faecal and liver fat content, and adipose tissue metabolism was investigated following high-fat feeding. Results Thylakoid supplementation for 14 days caused an increased faecal fat content without compensatory eating compared to control. As a result, thylakoid treated animals had reduced fat mass depots and reduced liver fat accumulation compared to control. The size distribution of adipocytes isolated from visceral adipose tissue was narrowed and the cell size decreased. Adipocytes isolated from thylakoid-treated mice displayed a significantly increased lipogenesis, and protein expression of peroxisome proliferator-activated receptor gamma (PPARγ), down-stream target FAS, as well as transcription factor coactivators PGC1-α and LPIN-1 were upregulated in adipose tissue from thylakoid-fed mice. Conclusions Together, these data suggest that thylakoid supplementation reduces body fat and fat cell size by binding to dietary fat and increasing its fecal excretion, thus reducing dietary fat available for absorption.
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Affiliation(s)
- Karin G Stenkula
- Glucose Transport and Protein Trafficking, Department of Experimental Medical Science, BMC, Lund University, 221 84 Lund, Sweden
| | - Eva-Lena Stenblom
- Appetite Control, Department of Experimental Medical Science, BMC, Lund University, 221 84 Lund, Sweden
| | - Caroline Montelius
- Appetite Control, Department of Experimental Medical Science, BMC, Lund University, 221 84 Lund, Sweden
| | - Emil Egecioglu
- Appetite Control, Department of Experimental Medical Science, BMC, Lund University, 221 84 Lund, Sweden
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Stenblom EL, Weström B, Linninge C, Bonn P, Farrell M, Rehfeld JF, Montelius C. Dietary green-plant thylakoids decrease gastric emptying and gut transit, promote changes in the gut microbial flora, but does not cause steatorrhea. Nutr Metab (Lond) 2016; 13:67. [PMID: 27777602 PMCID: PMC5059972 DOI: 10.1186/s12986-016-0128-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Accepted: 10/03/2016] [Indexed: 02/08/2023] Open
Abstract
Green-plant thylakoids increase satiety by affecting appetite hormones such as ghrelin, cholecystokinin (CCK) and glucagon-like peptide-1 (GLP-1). The objective of this study was to investigate if thylakoids also affect gastrointestinal (GI) passage and microbial composition. To analyse the effects on GI passage, 16 rats were gavage-fed a control or thylakoid-supplemented high-fat diet (HFD) 30 min before receiving Evans blue. Another 16 rats were fed a control HFD or thylakoid HFD for two weeks prior to the intragastric challenge with Evans blue. The amount of Evans blue in the stomach and the distance of migration in the intestines after 30 min were used as a measurement of gastric emptying and intestinal transit. These were reduced by thylakoid supplementation in the acute study, and however not significantly also after the two-week diet study. The second aim of the study was to investigate if thylakoid-supplementation affects the gut microbiota and amount of faecal fat in healthy human volunteers (n = 34) receiving thylakoid or placebo treatments for three months. Microbiota was analysed using 16S rRNA gene sequencing and qPCR, and faecal fat was extracted by dichloromethane. The total bacteria, and specifically the Bacteriodes fragilis group, were increased by thylakoid treatment versus placebo, while thylakoids did not cause steatorrhea. Dietary supplementation with thylakoids thus affects satiety both via appetite hormones and GI fullness, and affects the microbial composition without causing GI adverse effects such as steatorrhea. This suggests thylakoids as a novel agent in prevention and treatment of obesity.
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Affiliation(s)
- Eva-Lena Stenblom
- Department of Experimental Medical Science, Appetite Regulation Unit, BMC B11, Lund University, Sölvegatan 19, SE-221 84 Lund, Sweden
| | - Björn Weström
- Department of Biology, Lund University, Sölvegatan 35, SE-223 62 Lund, Sweden
| | - Caroline Linninge
- Department of Food Technology, Engineering and Nutrition, Lund University, Box 124, SE-221 00 Lund, Sweden
| | - Peter Bonn
- Medicinal Chemistry CVMD, AstraZeneca R&D, Mölndal, Sweden
| | - Mary Farrell
- Department of Experimental Medical Science, Appetite Regulation Unit, BMC B11, Lund University, Sölvegatan 19, SE-221 84 Lund, Sweden
| | - Jens F Rehfeld
- Department of Clinical Biochemistry, Rigshospitalet, Copenhagen University, DK-2100 Copenhagen, Denmark
| | - Caroline Montelius
- Department of Experimental Medical Science, Appetite Regulation Unit, BMC B11, Lund University, Sölvegatan 19, SE-221 84 Lund, Sweden
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Stenblom EL, Egecioglu E, Montelius C, Ramachandran D, Bonn B, Weström B, Mansouri A, Langhans W, Erlanson-Albertsson C. Dietary thylakoids reduce visceral fat mass and increase expression of genes involved in intestinal fatty acid oxidation in high-fat fed rats. Am J Physiol Regul Integr Comp Physiol 2016; 311:R618-27. [PMID: 27488889 DOI: 10.1152/ajpregu.00212.2016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Accepted: 07/29/2016] [Indexed: 11/22/2022]
Abstract
Thylakoids reduce body weight gain and body fat accumulation in rodents. This study investigated whether an enhanced oxidation of dietary fat-derived fatty acids in the intestine contributes to the thylakoid effects. Male Sprague-Dawley rats were fed a high-fat diet with (n = 8) or without thylakoids (n = 8) for 2 wk. Body weight, food intake, and body fat were measured, and intestinal mucosa was collected and analyzed. Quantitative real-time PCR was used to measure gene expression levels of key enzymes involved in fatty acid transport, fatty acid oxidation, and ketogenesis. Another set of thylakoid-treated (n = 10) and control rats (n = 10) went through indirect calorimetry. In the first experiment, thylakoid-treated rats (n = 8) accumulated 25% less visceral fat than controls. Furthermore, fatty acid translocase (Fat/Cd36), carnitine palmitoyltransferase 1a (Cpt1a), and mitochondrial 3-hydroxy-3-methylglutaryl-CoA synthase 2 (Hmgcs2) genes were upregulated in the jejunum of the thylakoid-treated group. In the second experiment, thylakoid-treated rats (n = 10) gained 17.5% less weight compared with controls and their respiratory quotient was lower, 0.86 compared with 0.91. Thylakoid-intake resulted in decreased food intake and did not cause steatorrhea. These results suggest that thylakoids stimulated intestinal fatty acid oxidation and ketogenesis, resulting in an increased ability of the intestine to handle dietary fat. The increased fatty acid oxidation and the resulting reduction in food intake may contribute to the reduced fat accumulation in thylakoid-treated animals.
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Affiliation(s)
- Eva-Lena Stenblom
- Department of Experimental Medical Science, Appetite Regulation Unit, Faculty of Medicine, Lund University, Lund, Sweden
| | - Emil Egecioglu
- Department of Experimental Medical Science, Appetite Regulation Unit, Faculty of Medicine, Lund University, Lund, Sweden
| | - Caroline Montelius
- Department of Experimental Medical Science, Appetite Regulation Unit, Faculty of Medicine, Lund University, Lund, Sweden
| | | | - Britta Bonn
- AstraZeneca, R&D Gothenburg, Mölndal, Sweden; and
| | - Björn Weström
- Department of Biology, Lund University, Lund, Sweden
| | - Abdelhak Mansouri
- Physiology and Behavior Laboratory, ETH Zürich, Schwerzenbach, Switzerland
| | - Wolfgang Langhans
- Physiology and Behavior Laboratory, ETH Zürich, Schwerzenbach, Switzerland
| | - Charlotte Erlanson-Albertsson
- Department of Experimental Medical Science, Appetite Regulation Unit, Faculty of Medicine, Lund University, Lund, Sweden;
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Abstract
Overwhelming evidence indicates that diets rich in fruits and vegetables are protective against common chronic diseases, such as cancer, obesity and cardiovascular disease. Leafy green vegetables, in particular, are recognized as having substantial health-promoting activities that are attributed to the functional properties of their nutrients and non-essential chemical compounds. Spinach (Spinacia oleracea L.) is widely regarded as a functional food due to its diverse nutritional composition, which includes vitamins and minerals, and to its phytochemicals and bioactives that promote health beyond basic nutrition. Spinach-derived phytochemicals and bioactives are able to (i) scavenge reactive oxygen species and prevent macromolecular oxidative damage, (ii) modulate expression and activity of genes involved in metabolism, proliferation, inflammation, and antioxidant defence, and (iii) curb food intake by inducing secretion of satiety hormones. These biological activities contribute to the anti-cancer, anti-obesity, hypoglycemic, and hypolipidemic properties of spinach. Despite these valuable attributes, spinach consumption remains low in comparison to other leafy green vegetables. This review examines the functional properties of spinach in cell culture, animals and humans with a focus on the molecular mechanisms by which spinach-derived non-essential phytochemicals and bioactives, such as glycolipids and thylakoids, impart their health benefits.
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Affiliation(s)
- Joseph L Roberts
- Department of Nutrition & Health Sciences, University of Nebraska-Lincoln, Lincoln, NE 68583, USA
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Erlanson-Albertsson C, Albertsson PÅ. The Use of Green Leaf Membranes to Promote Appetite Control, Suppress Hedonic Hunger and Loose Body Weight. Plant Foods Hum Nutr 2015; 70:281-290. [PMID: 26115760 PMCID: PMC4539357 DOI: 10.1007/s11130-015-0491-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
On-going research aims at answering the question, which satiety signal is the most potent or which combination of satiety signals is the most potent to stop eating. There is also an aim at finding certain food items or food additives that could be used to specifically reduce food intake therapeutically. Therapeutic attempts to normalize body weight and glycaemia with single agents alone have generally been disappointing. The success of bariatric surgery illustrates the rationale of using several hormones to treat obesity and type-2-diabetes. We have found that certain components from green leaves, the thylakoids, when given orally have a similar rationale in inducing the release of several gut hormones at the same time. In this way satiety is promoted and hunger suppressed, leading to loss of body weight and body fat. The mechanism is a reduced rate of intestinal lipid hydrolysis, allowing the lipolytic products to reach the distal intestine and release satiety hormones. The thylakoids also regulate glucose uptake in the intestine and influences microbiota composition in the intestine in a prebiotic direction. Using thylakoids is a novel strategy for treatment and prevention of obesity.
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Affiliation(s)
- Charlotte Erlanson-Albertsson
- Department of Experimental Medical Science, Appetite Control Unit, Bio-Medical Centre (BMC), B11, Lund University, Sölvegatan 19, SE 221 84, Lund, Sweden,
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Rebello CJ, Chu J, Beyl R, Edwall D, Erlanson-Albertsson C, Greenway FL. Acute Effects of a Spinach Extract Rich in Thylakoids on Satiety: A Randomized Controlled Crossover Trial. J Am Coll Nutr 2015; 34:470-7. [PMID: 26029978 PMCID: PMC4600649 DOI: 10.1080/07315724.2014.1003999] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
Objective: By retarding fat digestion, thylakoids, the internal photosynthetic membrane system of green plants, promote the release of satiety hormones. This study examined the effect of consuming a single dose of concentrated extract of thylakoids from spinach on satiety, food intake, lipids, and glucose compared to a placebo. Design: Sixty overweight and obese individuals enrolled in a double-blind randomized crossover study consumed the spinach extract or placebo in random order at least a week apart. Blood was drawn for assessments of lipids and glucose before a standard breakfast meal, followed 4 hours later by a 5 g dose of the extract and a standard lunch. Visual analog scales were administered before lunch and at intervals until an ad libitum pizza dinner served 4 hours later. Two hours after lunch a second blood draw was conducted. Mixed models were used to analyze response changes. Results: Compared to placebo, consuming the spinach extract reduced hunger (p < 0.01) and longing for food over 2 hours (p < 0.01) and increased postprandial plasma glucose concentrations (p < 0.01). There were no differences in plasma lipids and energy intake at dinner, but males showed a trend toward decreased energy intake (p = 0.08). Conclusions: At this dose, the spinach extract containing thylakoids increases satiety over a 2-hour period compared to a placebo. Thylakoid consumption may influence gender-specific food cravings.
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Affiliation(s)
- Candida J Rebello
- a Pennington Biomedical Research Center.,b School of Nutrition and Food Sciences, Louisiana State University System , Baton Rouge , Louisiana
| | - Jessica Chu
- c Louisiana State University School of Medicine , New Orleans , Louisiana
| | | | - Dan Edwall
- d Greenleaf Medical AB , Stockholm , SWEDEN
| | - Charlotte Erlanson-Albertsson
- e Department of Experimental Medical Science, Appetite Regulation Unit, Faculty of Medicine, Lund University , Lund , SWEDEN
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Stenblom EL, Egecioglu E, Landin-Olsson M, Erlanson-Albertsson C. Consumption of thylakoid-rich spinach extract reduces hunger, increases satiety and reduces cravings for palatable food in overweight women. Appetite 2015; 91:209-19. [PMID: 25895695 DOI: 10.1016/j.appet.2015.04.051] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Revised: 03/27/2015] [Accepted: 04/10/2015] [Indexed: 12/25/2022]
Abstract
Green-plant membranes, thylakoids, have previously been found to increase postprandial release of the satiety hormone GLP-1, implicated in reward signaling. The purpose of this study was to investigate how treatment with a single dose of thylakoids before breakfast affects homeostatic as well as hedonic hunger, measured as wanting and liking for palatable food (VAS). We also examined whether treatment effects were correlated to scores for eating behavior. Compared to placebo, intake of thylakoids significantly reduced hunger (21% reduction, p < 0.05), increased satiety (14% increase, p < 0.01), reduced cravings for all snacks and sweets during the day (36% reduction, p < 0.05), as well as cravings for salty (30%, p < 0.01); sweet (38%, p < 0.001); and sweet-and-fat (36%, p < 0.05) snacks, respectively, and decreased subjective liking for sweet (28% reduction, p < 0.01). The treatment effects on wanting all snacks, sweet-and-fat snacks in particular, were positively correlated to higher emotional eating scores (p < 0.01). The treatment effect of thylakoids on scores for wanting and liking were correlated to a reduced intake by treatment (p < 0.01 respectively), even though food intake was not affected significantly. In conclusion, thylakoids may be used as a food supplement to reduce homeostatic and hedonic hunger, associated with overeating and obesity. Individuals scoring higher for emotional eating behavior may have enhanced treatment effect on cravings for palatable food.
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Affiliation(s)
- Eva-Lena Stenblom
- Department of Experimental Medical Science, Appetite Regulation Unit, Faculty of Medicine, Lund University, Sölvegatan 19, S-221 84 Lund, Sweden
| | - Emil Egecioglu
- Department of Experimental Medical Science, Appetite Regulation Unit, Faculty of Medicine, Lund University, Sölvegatan 19, S-221 84 Lund, Sweden
| | - Mona Landin-Olsson
- Department of Experimental Medical Science, Appetite Regulation Unit, Faculty of Medicine, Lund University, Sölvegatan 19, S-221 84 Lund, Sweden
| | - Charlotte Erlanson-Albertsson
- Department of Experimental Medical Science, Appetite Regulation Unit, Faculty of Medicine, Lund University, Sölvegatan 19, S-221 84 Lund, Sweden.
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Östbring K, Rayner M, Sjöholm I, Otterström J, Albertsson PÅ, Emek SC, Erlanson-Albertsson C. The effect of heat treatment of thylakoids on their ability to inhibit in vitro lipase/co-lipase activity. Food Funct 2015; 5:2157-65. [PMID: 25016966 DOI: 10.1039/c3fo60651a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Thylakoids has been shown to prolong lipolysis by the inhibition of lipase/co-lipase, which makes thylakoids suitable as a functional food ingredient with satiating properties. The components of thylakoids that provide its function as a lipolysis modulator are primarily photosystems I and II, which are structurally stabilised by chlorophyll. However, chlorophyll is known to be heat sensitive yet the enzymatic inhibiting capacity after heat treatment has not been previously studied. It was hypothesised that the retained function of thylakoids after heat treatment could be correlated to the degree of degradation. Heat treatment at either 60 °C, 75 °C or 90 °C for time interval ranging from 15 s to 120 min induced a color shift from bright green to olive brown which was attributed to degradation. The ability of heat-treated thylakoids to inhibit lipolysis in vitro was also reduced. A correlation between chlorophyll a degradation and the enzymatic inhibiting capacity could be established which opens possibilities to use a spectrophotometric method to quantify the ability of thylakoids to inhibit lipase/co-lipase in a more rapid and cost effective way to complement the pH-stat method used today. With the degradation pattern investigated, it is then possible to design a thermal treatment process to ensure a microbiological safe appetite-reducing product and at the same time minimize the loss of functionality.
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Affiliation(s)
- Karolina Östbring
- Department of Experimental Medical Science, Appetite Control Unit, BMC, Lund University, SE-221 84 Lund, Sweden.
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Östbring K, Rayner M, Albertsson PÅ, Erlanson-Albertsson C. Heat-induced aggregation of thylakoid membranes affect their interfacial properties. Food Funct 2015; 6:1310-8. [DOI: 10.1039/c4fo01074d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Heat treatment of thylakoid membranes induce loss of chlorophyll, reduced emulsifying capacity and reduced lipase/co-lipase inhibition capacityin vitro.
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Affiliation(s)
- Karolina Östbring
- Department of Experimental Medical Science
- Appetite Control Unit
- BMC
- Lund University
- SE-221 84 Lund
| | - Marilyn Rayner
- Department of Food Technology
- Engineering and Nutrition
- Faculty of Engineering
- Chemical Centre
- Lund University
| | - Per-Åke Albertsson
- Department of Biochemistry and Structural Biology
- Chemical Centre
- Lund University
- SE-221 00 Lund
- Sweden
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Montelius C, Szwiec K, Kardas M, Lozinska L, Erlanson-Albertsson C, Pierzynowski S, Rehfeld JF, Weström B. Dietary thylakoids suppress blood glucose and modulate appetite-regulating hormones in pigs exposed to oral glucose tolerance test. Clin Nutr 2014; 33:1122-6. [DOI: 10.1016/j.clnu.2013.12.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2013] [Revised: 12/20/2013] [Accepted: 12/20/2013] [Indexed: 10/25/2022]
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Montelius C, Erlandsson D, Vitija E, Stenblom EL, Egecioglu E, Erlanson-Albertsson C. Body weight loss, reduced urge for palatable food and increased release of GLP-1 through daily supplementation with green-plant membranes for three months in overweight women. Appetite 2014; 81:295-304. [PMID: 24993695 DOI: 10.1016/j.appet.2014.06.101] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Revised: 06/22/2014] [Accepted: 06/25/2014] [Indexed: 01/02/2023]
Abstract
The frequency of obesity has risen dramatically in recent years but only few effective and safe drugs are available. We investigated if green-plant membranes, previously shown to reduce subjective hunger and promote satiety signals, could affect body weight when given long-term. 38 women (40-65 years of age, body mass index 25-33 kg/m(2)) were randomized to dietary supplementation with either green-plant membranes (5 g) or placebo, consumed once daily before breakfast for 12 weeks. All individuals were instructed to follow a three-meal paradigm without any snacking between the meals and to increase their physical activity. Body weight change was analysed every third week as was blood glucose and various lipid parameters. On days 1 and 90, following intake of a standardized breakfast, glucose, insulin and glucagon-like peptide 1 (GLP-1) in plasma were measured, as well as subjective ratings of hunger, satiety and urge for different palatable foods, using visual analogue scales. Subjects receiving green-plant membranes lost significantly more body weight than did those on placebo (p < 0.01). Mean weight loss with green-plant extract was 5.0 ± 2.3 kg compared to 3.5 ± 2.3 kg in the control group. Consumption of green-plant membranes also reduced total and LDL-cholesterol (p < 0.01 and p < 0.05 respectively) compared to control. Single-meal tests performed on day 1 and day 90 demonstrated an increased postprandial release of GLP-1 and decreased urge for sweet and chocolate on both occasions in individuals supplemented with green-plant membranes compared to control. Waist circumference, body fat and leptin decreased in both groups over the course of the study, however there were no differences between the groups. In conclusion, addition of green-plant membranes as a dietary supplement once daily induces weight loss, improves obesity-related risk-factors, and reduces the urge for palatable food. The mechanism may reside in the observed increased release of GLP-1.
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Affiliation(s)
- Caroline Montelius
- Department of Experimental Medical Science, Appetite Regulation Unit, Faculty of Medicine, Lund University, Sölvegatan 19, 221 84 Lund, Sweden
| | - Daniel Erlandsson
- Department of Experimental Medical Science, Appetite Regulation Unit, Faculty of Medicine, Lund University, Sölvegatan 19, 221 84 Lund, Sweden
| | - Egzona Vitija
- Department of Experimental Medical Science, Appetite Regulation Unit, Faculty of Medicine, Lund University, Sölvegatan 19, 221 84 Lund, Sweden
| | - Eva-Lena Stenblom
- Department of Experimental Medical Science, Appetite Regulation Unit, Faculty of Medicine, Lund University, Sölvegatan 19, 221 84 Lund, Sweden
| | - Emil Egecioglu
- Department of Experimental Medical Science, Appetite Regulation Unit, Faculty of Medicine, Lund University, Sölvegatan 19, 221 84 Lund, Sweden
| | - Charlotte Erlanson-Albertsson
- Department of Experimental Medical Science, Appetite Regulation Unit, Faculty of Medicine, Lund University, Sölvegatan 19, 221 84 Lund, Sweden.
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Stenblom EL, Montelius C, Östbring K, Håkansson M, Nilsson S, Rehfeld JF, Erlanson-Albertsson C. Supplementation by thylakoids to a high carbohydrate meal decreases feelings of hunger, elevates CCK levels and prevents postprandial hypoglycaemia in overweight women. Appetite 2013; 68:118-23. [DOI: 10.1016/j.appet.2013.04.022] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2012] [Revised: 04/18/2013] [Accepted: 04/19/2013] [Indexed: 10/26/2022]
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Montelius C, Osman N, Weström B, Ahrné S, Molin G, Albertsson PÅ, Erlanson-Albertsson C. Feeding spinach thylakoids to rats modulates the gut microbiota, decreases food intake and affects the insulin response. J Nutr Sci 2013; 2:e20. [PMID: 25191569 DOI: 10.1017/jns.2012.29] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2012] [Revised: 11/02/2012] [Accepted: 11/06/2012] [Indexed: 01/17/2023] Open
Abstract
Thylakoid membranes derived from green leaf chloroplasts affect appetite-regulating
hormones, suppress food intake, reduce blood lipids and lead to a decreased body weight in
animals and human subjects. Thylakoids also decrease the intestinal in
vitro uptake of methyl-glucose in the rat. The aim of this study was to
investigate the effect of dietary thylakoids on the gut microbiota composition, mainly the
taxa of lactobacilli and bifidobacteria, in rats fed either a thylakoid-enriched diet or a
control diet for 10 d. At the same time, a glucose-tolerance test in the same rats was
also performed. Food intake was significantly decreased in the thylakoid-fed rats compared
with the control-fed rats over the 10-d study. An oral glucose tolerance test after 10 d
of thylakoid- or control-food intake resulted in significantly reduced plasma insulin
levels in the thylakoid-fed rats compared with the control-fed rats, while no difference
was observed for blood glucose levels. Analysis of gut bacteria showed a significant
increase of lactobacilli on the ileal mucosa, specifically Lactobacillus
reuteri, in the rats fed the thylakoid diet compared with rats fed the control
diet, while faecal lactobacilli decreased. No difference in bifidobacteria between the
thylakoid and control groups was found. Analyses with terminal restriction fragment length
polymorphism and principal component analysis of faeces demonstrated different microbial
populations in the thylakoid- and control-fed animals. These findings indicate that
thylakoids modulate the gut microbial composition, which might be important for the
regulation of body weight and energy metabolism.
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Emek SC, Åkerlund HE, Erlanson-Albertsson C, Albertsson PÅ. Pancreatic lipase-colipase binds strongly to the thylakoid membrane surface. J Sci Food Agric 2013; 93:2254-8. [PMID: 23355304 DOI: 10.1002/jsfa.6034] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2012] [Revised: 11/30/2012] [Accepted: 12/11/2012] [Indexed: 05/05/2023]
Abstract
BACKGROUND Isolated thylakoid membranes, i.e. the photosynthetic membranes of green leaves, inhibit the activity of pancreatic lipase and colipase during hydrolysis of fat in vitro. This inhibition has been demonstrated to cause reduced food intake and improved hormonal and lipid profile in vivo. One of the reasons suggested for the inhibiting effect is binding of lipase-colipase to the thylakoid membrane surface. This prompted a study of the binding of lipase and colipase to thylakoids. RESULTS The results showed that lipase and colipase strongly bind to the thylakoid membrane surface. The dissociation constant was determined at 1.2 × 10⁻⁸ mol L⁻¹; binding decreased after treatment of thylakoids with pepsin/trypsin to 1.0 × 10⁻⁷ and to 0.6 × 10⁻⁷ mol L⁻¹ after treatment with pancreatic juice. Similarly, delipidation of thylakoids caused a decrease in binding, the dissociation constant being 2.0 × 10⁻⁷ mol L⁻¹. CONCLUSION The binding of pancreatic lipase-colipase to the thylakoid membrane is strong and may explain the inhibition of lipase-colipase activity by thylakoids. After treatment with proteases to mimic intestinal digestion binding is decreased, but is still high enough to explain the observed metabolic effects of thylakoids in vivo.
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Affiliation(s)
- Sinan Cem Emek
- Department of Biochemistry and Structural Biology, Chemical Centre, Lund University, SE-221 00, Lund, Sweden
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Emek SC, Åkerlund HE, Clausén M, Ohlsson L, Weström B, Erlanson-Albertsson C, Albertsson PÅ. Pigments protect the light harvesting proteins of chloroplast thylakoid membranes against digestion by gastrointestinal proteases. Food Hydrocoll 2011. [DOI: 10.1016/j.foodhyd.2010.12.004] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Montelius C, Gustafsson K, Weström B, Albertsson P, Emek SC, Rayner M, Erlanson-albertsson C. Chloroplast thylakoids reduce glucose uptake and decrease intestinal macromolecular permeability. Br J Nutr 2011; 106:836-44. [DOI: 10.1017/s0007114511001267] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Thylakoid membranes, derived from chloroplasts, have previously been shown to retard fat digestion and lower blood glucose levels after oral intake. The purpose of the present study was to investigate the effect of thylakoid membranes on the passage of methyl-glucose, dextran and ovalbumin over rat intestine in vitro using Ussing chambers. The results show that thylakoids retard the passage of each of the test molecules in a dose-dependent way. The thylakoids appear to be attached on the mucosal surface and a mechanism is suggested that the thylakoids delay the passage of the test molecules by sterical hindrance. The present results indicate that thylakoid membranes may be useful both to control intestinal absorption of glucose and to enhance the barrier function of the intestine.
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Rayner M, Ljusberg H, Emek SC, Sellman E, Erlanson-Albertsson C, Albertsson PÅ. Chloroplast thylakoid membrane-stabilised emulsions. J Sci Food Agric 2011; 91:315-21. [PMID: 20960431 DOI: 10.1002/jsfa.4187] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
BACKGROUND Thylakoid-stabilised emulsions have been reported to possess satiety-promoting effects and inhibit pancreatic lipase-colipase activity in vitro, which prompted the investigation of their interfacial properties. RESULTS Thylakoid membranes isolated from spinach were used as an emulsifier/stabiliser in oil (triglyceride)-in-water emulsions. Emulsions were characterised with respect to droplet size, interfacial tension, creaming, surface load and electron microscopy. The effects of pH and thylakoid concentration were also considered. Droplet size decreased with increasing thylakoid concentration, reaching a plateau around 15 microm beyond concentrations of 2 mg protein mL(-1) oil. The resulting emulsions were stable against coalescence but were subject to creaming. The surface pressure (air/water interface) of the thylakoid isolate was 44 mN m(-1) and the surface load 13 mg m(-2) at 10 mg protein mL(-1) oil. Electron micrographs showed thylakoids adsorbed as bunched vesicles on the drop surfaces. The stabilisation mechanism can be described as a combined effect of surface-active molecules, mainly membrane proteins but also membrane lipids, exposed on surfaces of thylakoid membrane vesicles adsorbed as particles. CONCLUSION Thylakoid membranes effectively stabilise oil-in-water emulsions, which should facilitate their incorporation in food with satiety-promoting effects. To the authors' knowledge, this is the first study on the emulsifying properties of an isolated biological membrane as a functional ingredient.
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Affiliation(s)
- Marilyn Rayner
- Department of Food Technology, Engineering and Nutrition, Faculty of Engineering, Lund University, Lund, Sweden.
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Rayner M, Emek SC, Gustafssona K, Albertsson CE, Albertsson PÅ. A novel emulsifier from spinach with appetite regulation abilities. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.profoo.2011.09.212] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Köhnke R, Svensson L, Valverde Piedra JL, Pierzynowski SG, Weström B, Erlanson-albertsson C. Feeding appetite suppressing thylakoids to pigs alters pancreatic lipase/colipase secretion. Livest Sci 2010; 134:68-71. [DOI: 10.1016/j.livsci.2010.06.100] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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