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Jin H, Yao L, Wang S, Xia P, Hou T, Li B, Li J. Effects of KGM and Degradation Products on Appetite Regulation and Energy Expenditure in High-Fat-Diet Mice via the Adipocyte-Hypothalamus Axis. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:15765-15777. [PMID: 38970495 DOI: 10.1021/acs.jafc.4c03819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/08/2024]
Abstract
Konjac glucomannan (KGM), high-viscosity dietary fiber, is utilized in weight management. Previous investigations on the appetite-suppressing effects of KGM have centered on intestinal responses to nutrients and gastric emptying rates, with less focus on downstream hypothalamic neurons of satiety hormones. In our studies, the molecular mechanisms through which KGM and its degradation products influence energy homeostasis via the adipocyte-hypothalamic axis have been examined. It was found that high-viscosity KGM more effectively stimulates enteroendocrine cells to release glucagon-like peptide-1 (GLP-1) and reduces ghrelin production, thereby activating hypothalamic neurons and moderating short-term satiety. Conversely, low-viscosity DKGM has been shown to exhibit stronger anti-inflammatory properties in the hypothalamus, enhancing hormone sensitivity and lowering the satiety threshold. Notably, both KGM and DKGM significantly reduced leptin signaling and fatty acid signaling in adipose tissue and activated brown adipose tissue thermogenesis to suppress pro-opiomelanocortin (POMC) expression and activate agouti-related protein (AgRP) expression, thereby reducing food intake and increasing energy expenditure. Additionally, high-viscosity KGM has been found to activate the adipocyte-hypothalamus axis more effectively than DKGM, thereby promoting greater daily energy expenditure. These findings provide novel insights into the adipocyte-hypothalamic axis for KGM to suppress appetite and reduce weight.
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Affiliation(s)
- Hong Jin
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
- Key Laboratory of Environment Correlative Dietology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
| | - Lanlan Yao
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
- Key Laboratory of Environment Correlative Dietology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
| | - Shenwan Wang
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
- Key Laboratory of Environment Correlative Dietology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
| | - Pengkui Xia
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
- Key Laboratory of Environment Correlative Dietology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
| | - Tao Hou
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
- Key Laboratory of Environment Correlative Dietology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
| | - Bin Li
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
- Key Laboratory of Environment Correlative Dietology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
| | - Jing Li
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
- Key Laboratory of Environment Correlative Dietology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
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Zeinabi A, Ghaedi H, Hosseini SA. Soluble Fiber Effect on Human Serum Leptin and Adiponectin: A Systematic Review and Dose-Response Meta-Analysis. Clin Nutr Res 2023; 12:320-335. [PMID: 37969941 PMCID: PMC10641331 DOI: 10.7762/cnr.2023.12.4.320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 08/16/2023] [Accepted: 10/16/2023] [Indexed: 11/17/2023] Open
Abstract
Literature showed that soluble fiber has beneficial effects on cardiometabolic risk factors and leptin and adiponectin serum levels. Our aim in this meta-analysis was to determine the effect of soluble fiber supplementation on leptin and adiponectin serum levels. A systematic search was conducted using PubMed, Scopus, and ISI Web of Science for eligible trials up to December 2021. A random-effects model was used to pool calculated effect sizes. Our analysis showed that soluble fiber supplementation did not significantly affect adiponectin (standardized mean difference [SMD], -0.49 Hedges's, 95% confidence interval [CI], -1.20, 0.21, p value = 0.167; I2 = 95.4, p value < 0.001) and leptin (SMD, -0.8 Hedges's, 95% CI, -1.70, 0.08, p value = 0.076; I2 = 94.6, p value < 0.001) concentrations in comparison with placebo. However, in the subgroup, soluble fiber supplementation had a significant improvement in leptin concentration in overweight and obese patients (SMD, -0.22 Hedges's, 95% CI, -0.43, -0.01, p value = 0.048) and a non-significant beneficial effect in adiponectin level in female (SMD, 0.29 Hedges's, 95% CI, -0.13, 0.71, p value = 0.183) and diabetic patients (SMD, 0.32 Hedges's, 95% CI, -0.67, 1.32, p value = 0.526). A non-linear association between soluble fiber dosage and adiponectin (pnon-linearity < 0.001) was observed. Soluble fiber supplementation could not change the circulatory leptin and adiponectin levels. However, beneficial effects were seen in overweight and obese leptin, and increases in adiponectin may also be observed in female and diabetic patients. Further studies are needed to confirm this results.
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Affiliation(s)
- Ali Zeinabi
- Department of Sport Physiology, Lamerd Branch, Islamic Azad University, Lamerd 14696-69191, Iran
| | - Hadi Ghaedi
- Department of Sport Physiology, Lamerd Branch, Islamic Azad University, Lamerd 14696-69191, Iran
| | - Seyed Ali Hosseini
- Department of Sport Physiology, Marvdasht Branch, Islamic Azad University, Marvdasht 73711-13119, Iran
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Devi K, Kumar V, Kumar V, Mahajan N, Kaur J, Sharma S, Kumar A, Khan R, Bishnoi M, Kondepudi KK. Modified cereal bran (MCB) from finger millet, kodo millet, and rice bran prevents high-fat diet-induced metabolic derangements. Food Funct 2023; 14:1459-1475. [PMID: 36648164 DOI: 10.1039/d2fo02095e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Cereal bran consumption improves gastrointestinal and metabolic health. Unprocessed cereal brans have a limited shelf-life and contain anti-nutrient phytochemicals. In the present study, lipids and antinutrients (flavonoids, tannin, and polyphenol) were removed from finger millet, kodo millet and rice bran using chemo-enzymatic processing. The thus-obtained modified cereal brans (MCBs) were evaluated for their potential in preventing high fat diet (HFD)-induced obesity. C57BL/6 mice were fed a HFD or a HFD supplemented with 10% w/w modified finger millet bran (mFMB), modified kodo millet bran (mKMB), modified rice bran (mRB), or a combination of the modified brans (1 : 1 : 1) for twelve weeks. The MCBs reduced HFD-induced body weight gain, improved glucose homeostasis, decreased the Firmicutes/Bacteroidetes ratio, and increased the short chain fatty acid (SCFA) levels in the cecum. Liver dyslipidemia, oxidative stress, inflammation, visceral white adipose tissue (vWAT) hypertrophy, and lipolysis were also prevented by the MCBs. Among the individual MCBs, mRB showed a greater effect in preventing HFD-induced increase in the inflammatory cytokines (IL-6, TNF-α, and LPS) than mFMB and mKMB. mFMB and mKMB supplementation more significantly restored the relative abundance of Akkermansia muciniphila and butyrate-producing genera such as Lachnospiraceae, Eubacterium, and Ruminococcus than mRB. Ex vivo gut permeability assay, immunohistochemistry of tight junction proteins, and gene expression analysis in the colon revealed that the combination of three brans was better in preventing HFD-induced leaky gut in comparison to the individual brans. Hierarchical clustering analysis showed that the combination group was clustered closest to the NPD group, suggesting an additive effect. Our study implies that a combination of mFMB, mKMB, and mRB could be used as a nutraceutical or functional food ingredient for preventing HFD-induced gut derangements and associated metabolic complications.
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Affiliation(s)
- Kirti Devi
- Centre for Excellence in Functional Foods, Division of Food and Nutritional Biotechnology, National Agri-Food Biotechnology Institute (NABI), Knowledge City-Sector 81, SAS Nagar, Punjab 140306, India. .,Department of Biotechnology, Panjab University, Sector-25, Chandigarh 160014, India
| | - Vibhu Kumar
- Centre for Excellence in Functional Foods, Division of Food and Nutritional Biotechnology, National Agri-Food Biotechnology Institute (NABI), Knowledge City-Sector 81, SAS Nagar, Punjab 140306, India. .,University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh 160014, India
| | - Vijay Kumar
- Centre for Excellence in Functional Foods, Division of Food and Nutritional Biotechnology, National Agri-Food Biotechnology Institute (NABI), Knowledge City-Sector 81, SAS Nagar, Punjab 140306, India. .,Department of Biotechnology, Panjab University, Sector-25, Chandigarh 160014, India
| | - Neha Mahajan
- Centre for Excellence in Functional Foods, Division of Food and Nutritional Biotechnology, National Agri-Food Biotechnology Institute (NABI), Knowledge City-Sector 81, SAS Nagar, Punjab 140306, India. .,Regional Centre for Biotechnology, Faridabad-Gurgaon Expressway, Faridabad, Haryana 121001, India
| | - Jasleen Kaur
- Centre for Excellence in Functional Foods, Division of Food and Nutritional Biotechnology, National Agri-Food Biotechnology Institute (NABI), Knowledge City-Sector 81, SAS Nagar, Punjab 140306, India. .,University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh 160014, India
| | - Shikha Sharma
- Centre for Excellence in Functional Foods, Division of Food and Nutritional Biotechnology, National Agri-Food Biotechnology Institute (NABI), Knowledge City-Sector 81, SAS Nagar, Punjab 140306, India. .,Department of Biotechnology, Panjab University, Sector-25, Chandigarh 160014, India
| | - Ajay Kumar
- Institute of Nanoscience and Technology (INST), Knowledge city-Sector 81, SAS Nagar, Punjab 140306, India
| | - Rehan Khan
- Institute of Nanoscience and Technology (INST), Knowledge city-Sector 81, SAS Nagar, Punjab 140306, India
| | - Mahendra Bishnoi
- Centre for Excellence in Functional Foods, Division of Food and Nutritional Biotechnology, National Agri-Food Biotechnology Institute (NABI), Knowledge City-Sector 81, SAS Nagar, Punjab 140306, India. .,Department of Biotechnology, Panjab University, Sector-25, Chandigarh 160014, India.,Regional Centre for Biotechnology, Faridabad-Gurgaon Expressway, Faridabad, Haryana 121001, India
| | - Kanthi Kiran Kondepudi
- Centre for Excellence in Functional Foods, Division of Food and Nutritional Biotechnology, National Agri-Food Biotechnology Institute (NABI), Knowledge City-Sector 81, SAS Nagar, Punjab 140306, India. .,Department of Biotechnology, Panjab University, Sector-25, Chandigarh 160014, India.,Regional Centre for Biotechnology, Faridabad-Gurgaon Expressway, Faridabad, Haryana 121001, India
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Ahmed AA, Musa HH, Essa MEA, Mollica A, Zengin G, Ahmad H, Adam SY. Inhibition of obesity through alterations of C/EBP- α gene expression by gum Arabic in mice with a high-fat feed diet. CARBOHYDRATE POLYMER TECHNOLOGIES AND APPLICATIONS 2022. [DOI: 10.1016/j.carpta.2022.100231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
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Tang Y, Li S, Yan J, Peng Y, Weng W, Yao X, Gao A, Cheng J, Ruan J, Xu B. Bioactive Components and Health Functions of Oat. FOOD REVIEWS INTERNATIONAL 2022. [DOI: 10.1080/87559129.2022.2029477] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Yong Tang
- College of Agriculture, Guizhou University, Guizhou, P. R. China
| | - Shijuan Li
- College of Plant Protection, Gansu Agricultural University, Lanzhou, P. R. China
| | - Jun Yan
- Key Laboratory of Coarse Cereal Processing in Ministry of Agriculture and Rural Affairs, School of Food and Biological Engineering, Chengdu University, Chengdu, P. R. China
| | - Yan Peng
- College of Agriculture, Guizhou University, Guizhou, P. R. China
| | - Wenfeng Weng
- College of Agriculture, Guizhou University, Guizhou, P. R. China
| | - Xin Yao
- College of Agriculture, Guizhou University, Guizhou, P. R. China
| | - Anjing Gao
- College of Agriculture, Guizhou University, Guizhou, P. R. China
| | - Jianping Cheng
- College of Agriculture, Guizhou University, Guizhou, P. R. China
| | - Jingjun Ruan
- College of Agriculture, Guizhou University, Guizhou, P. R. China
| | - Bingliang Xu
- College of Plant Protection, Gansu Agricultural University, Lanzhou, P. R. China
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Effect of sleeve gastrectomy, Roux-en-Y gastric bypass, and ileal transposition on myocardial ischaemia-reperfusion injury in non-obese non-diabetic rats. Sci Rep 2021; 11:23888. [PMID: 34903800 PMCID: PMC8668951 DOI: 10.1038/s41598-021-03283-y] [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] [Received: 09/21/2021] [Accepted: 11/30/2021] [Indexed: 11/12/2022] Open
Abstract
Bariatric surgery (BS) improves outcomes in patients with myocardial infarction (MI). Here we tested the hypothesis that BS-mediated reduction in fatal MI could be attributed to its infarct-limiting effect. Wistar rats were randomized into five groups: control (CON), sham (SHAM), Roux-en-Y gastric bypass (RYGB), sleeve gastrectomy (SG), and ileotransposition (IT). Ten weeks later, animals were subjected to 30-min myocardial ischemia plus 120-min reperfusion. Infarct size (IS) and no-reflow area were determined histochemically. Fasting plasma levels of glucagon-like peptide-1 (GLP-1), leptin, ghrelin, and insulin were measured using ELISA. Compared with SHAM, RYGB and SG reduced IS by 22% (p = 0.011) and 10% (p = 0.027), and no-reflow by 38% (p = 0.01) and 32% (p = 0.004), respectively. IT failed to reduce IS and no-reflow. GLP-1 level was increased in the SG and RYGB groups compared with CON. In both the SG and RYGB, leptin level was decreased compared with CON and SHAM. In the SG group, ghrelin level was lower than that in the CON and SHAM. Insulin levels were not different between groups. In conclusion, RYGB and SG increased myocardial tolerance to ischemia-reperfusion injury of non-obese, non-diabetic rats, and their infarct-limiting effect is associated with decreased leptin and ghrelin levels and increased GLP-1 level.
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7
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Gum Arabic modifies anti-inflammatory cytokine in mice fed with high fat diet induced obesity. ACTA ACUST UNITED AC 2021. [DOI: 10.1016/j.bcdf.2020.100258] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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8
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Barański M, Średnicka-Tober D, Rempelos L, Hasanaliyeva G, Gromadzka-Ostrowska J, Skwarło-Sońta K, Królikowski T, Rembiałkowska E, Hajslova J, Schulzova V, Cakmak I, Ozturk L, Hallmann E, Seal C, Iversen PO, Vigar V, Leifert C. Feed Composition Differences Resulting from Organic and Conventional Farming Practices Affect Physiological Parameters in Wistar Rats-Results from a Factorial, Two-Generation Dietary Intervention Trial. Nutrients 2021; 13:377. [PMID: 33530419 PMCID: PMC7911726 DOI: 10.3390/nu13020377] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 01/15/2021] [Accepted: 01/21/2021] [Indexed: 12/18/2022] Open
Abstract
Recent human cohort studies reported positive associations between organic food consumption and a lower incidence of obesity, cancer, and several other diseases. However, there are very few animal and human dietary intervention studies that provide supporting evidence or a mechanistic understanding of these associations. Here we report results from a two-generation, dietary intervention study with male Wistar rats to identify the effects of feeds made from organic and conventional crops on growth, hormonal, and immune system parameters that are known to affect the risk of a number of chronic, non-communicable diseases in animals and humans. A 2 × 2 factorial design was used to separate the effects of contrasting crop protection methods (use or non-use of synthetic chemical pesticides) and fertilizers (mineral nitrogen, phosphorus and potassium (NPK) fertilizers vs. manure use) applied in conventional and organic crop production. Conventional, pesticide-based crop protection resulted in significantly lower fiber, polyphenol, flavonoid, and lutein, but higher lipid, aldicarb, and diquat concentrations in animal feeds. Conventional, mineral NPK-based fertilization resulted in significantly lower polyphenol, but higher cadmium and protein concentrations in feeds. Feed composition differences resulting from the use of pesticides and/or mineral NPK-fertilizer had a significant effect on feed intake, weight gain, plasma hormone, and immunoglobulin concentrations, and lymphocyte proliferation in both generations of rats and in the second generation also on the body weight at weaning. Results suggest that relatively small changes in dietary intakes of (a) protein, lipids, and fiber, (b) toxic and/or endocrine-disrupting pesticides and metals, and (c) polyphenols and other antioxidants (resulting from pesticide and/or mineral NPK-fertilizer use) had complex and often interactive effects on endocrine, immune systems and growth parameters in rats. However, the physiological responses to contrasting feed composition/intake profiles differed substantially between the first and second generations of rats. This may indicate epigenetic programming and/or the generation of "adaptive" phenotypes and should be investigated further.
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Affiliation(s)
- Marcin Barański
- Department of Animal Physiology, Faculty of Biology, University of Warsaw, 02-096 Warsaw, Poland
- Laboratory of Neurobiology, Nencki Institute of Experimental Biology, Polish Academy of Sciences, Pasteura 3, 02-093 Warsaw, Poland
- Institute of Human Nutrition Sciences, Warsaw University of Life Sciences, Nowoursynowska 159c, 02-776 Warsaw, Poland
- Nafferton Ecological Farming Group, Food and Rural Development, School of Agriculture, Newcastle University, Newcastle upon Tyne, Tyne and Wear NE1 7RU, UK
| | - Dominika Średnicka-Tober
- Institute of Human Nutrition Sciences, Warsaw University of Life Sciences, Nowoursynowska 159c, 02-776 Warsaw, Poland
- Nafferton Ecological Farming Group, Food and Rural Development, School of Agriculture, Newcastle University, Newcastle upon Tyne, Tyne and Wear NE1 7RU, UK
| | - Leonidas Rempelos
- Nafferton Ecological Farming Group, Food and Rural Development, School of Agriculture, Newcastle University, Newcastle upon Tyne, Tyne and Wear NE1 7RU, UK
| | - Gultakin Hasanaliyeva
- Nafferton Ecological Farming Group, Food and Rural Development, School of Agriculture, Newcastle University, Newcastle upon Tyne, Tyne and Wear NE1 7RU, UK
- Department of Sustainable Crop and Food Protection, Food and Environmental Sciences, Faculty of Agriculture, Universita Catollica del Sacro Cuore, I-29122 Piacenza, Italy
| | - Joanna Gromadzka-Ostrowska
- Institute of Human Nutrition Sciences, Warsaw University of Life Sciences, Nowoursynowska 159c, 02-776 Warsaw, Poland
| | - Krystyna Skwarło-Sońta
- Department of Animal Physiology, Faculty of Biology, University of Warsaw, 02-096 Warsaw, Poland
| | - Tomasz Królikowski
- Institute of Human Nutrition Sciences, Warsaw University of Life Sciences, Nowoursynowska 159c, 02-776 Warsaw, Poland
| | - Ewa Rembiałkowska
- Institute of Human Nutrition Sciences, Warsaw University of Life Sciences, Nowoursynowska 159c, 02-776 Warsaw, Poland
| | - Jana Hajslova
- Department of Food Analysis and Nutrition, Institute of Chemical Technology, UCT Prague, 166 28 Prague, Czech Republic
| | - Vera Schulzova
- Department of Food Analysis and Nutrition, Institute of Chemical Technology, UCT Prague, 166 28 Prague, Czech Republic
| | - Ismail Cakmak
- Faculty of Engineering and Natural Sciences, Sabanci University, 34956 Istanbul, Turkey
| | - Levent Ozturk
- Faculty of Engineering and Natural Sciences, Sabanci University, 34956 Istanbul, Turkey
| | - Ewelina Hallmann
- Institute of Human Nutrition Sciences, Warsaw University of Life Sciences, Nowoursynowska 159c, 02-776 Warsaw, Poland
| | - Chris Seal
- Human Nutrition Research Centre, Institute of Cellular Medicine, Newcastle upon Tyne NE2 4HH, UK
| | - Per Ole Iversen
- Department of Nutrition, Institute of Basic Medical Sciences, University of Oslo, 0372 Oslo, Norway
- Department of Haematology, Oslo University Hospital, 0424 Oslo, Norway
| | - Vanessa Vigar
- NatMed, Southern Cross University, Military Rd., Lismore, NSW 2480, Australia
| | - Carlo Leifert
- Nafferton Ecological Farming Group, Food and Rural Development, School of Agriculture, Newcastle University, Newcastle upon Tyne, Tyne and Wear NE1 7RU, UK
- Department of Nutrition, Institute of Basic Medical Sciences, University of Oslo, 0372 Oslo, Norway
- SCU Plant Science, Southern Cross University, Military Rd., Lismore, NSW 2480, Australia
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Abstract
A high dietary fibre intake has been associated with improvements in inflammatory conditions in adults. However, little is known on whether associations between dietary fibre and inflammation are evident during adolescence. We examined the relationship between dietary fibre intake measured by FFQ and the inflammatory marker high-sensitivity C-reactive protein (hs-CRP) and the adipokines leptin and adiponectin cross-sectionally in 17-year-olds participating in the Raine Study (n 621). In weighted analysis using tobit and linear regression, and after excluding participants with hs-CRP > 10 mg/l, higher total dietary fibre intake (per 5 g/d) was significantly associated with lower leptin (β = -0·13, 95 % CI -0·17, -0·09) and adiponectin (β = -0·28, 95 % CI -0·49, -0·07), but not hs-CRP, in unadjusted analyses. These associations were no longer significant after adjustment for sex, anthropometry and a number of lifestyle factors. However, higher cereal and grain fibre intake was significantly associated with lower leptin (β = -0·06, 95 % CI -0·10, -0·01) in fully adjusted analysis. Our findings suggest that a higher intake of cereal and grain fibre may contribute to lower leptin in adolescents. This may contribute to reductions in low-grade chronic inflammation and improved health outcomes.
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Hassanzadeh-Rostami Z, Faghih S. Effect of Dietary Fiber on Serum Leptin Level: A Systematic Review and Meta-Analysis of Randomized Controlled Trials. Exp Clin Endocrinol Diabetes 2019; 129:322-333. [PMID: 31860117 DOI: 10.1055/a-0998-3883] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND Dietary fibers may induce satiety through affecting gastro-intestinal and peripheral appetite regulating hormones. Thus, we aimed to investigate the effect of dietary fiber consumption on serum leptin level compared to control diet, in short- and long- term trials, through a systematic review and meta-analysis. METHODS We searched PubMed, web of science, Scopus, ProQuest, EMBASE, and Cochrane Library to find randomized controlled clinical trials that evaluated effect of any type of dietary fiber on serum leptin level compared to control diet, until April 2019. Both short-term (1-4 days) and long-term (longer than 2 weeks) studies were selected. Mean differences (MD) of changes in serum leptin level and 95% confidence intervals were extracted from eligible studies, and random effects model was used to analyze data. RESULTS Thirteen studies included the systematic review and 11 entered in the meta-analysis. No significant change was seen in serum leptin level in short-term (MD=0.02, 95% CI; -0.15, 0.20, Tau2=0.0) and long-term studies (MD=-0.10, 95% CI; -0.28, 0.08, Tau2=0.0), followed by fiber consumption. However, this effect was statistically significant in obese participants (MD=-0.36, 95% CI; -0.71, -0.02, Tau2=0.0) in long-term studies. Moreover, we found no significant results in subgroups of baseline serum leptin level, intervention duration, fiber dose, and fiber type. CONCLUSIONS This meta-analysis found that taking dietary fiber for long term could lower serum leptin level, just in obese persons. However, further clinical trials are needed in this field to clarify this issue.
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Affiliation(s)
| | - Shiva Faghih
- Nutrition Research Center, School of Nutrition and Food Sciences, Shiraz University of Medical Sciences, Shiraz, Iran
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11
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Oat fiber inhibits atherosclerotic progression through improving lipid metabolism in ApoE−/− mice. J Funct Foods 2019. [DOI: 10.1016/j.jff.2019.02.046] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
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12
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Wu W, Qiu J, Wang A, Li Z. Impact of whole cereals and processing on type 2 diabetes mellitus: a review. Crit Rev Food Sci Nutr 2019; 60:1447-1474. [DOI: 10.1080/10408398.2019.1574708] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Weijing Wu
- College of Food Science and Nutritional Engineering, China Agricultural University, Haidian, Beijing, China
- Laboratory of nutrition and food safety, Xiamen Medical College, Xiamen, Fujian, China
| | - Ju Qiu
- Ministry of Agriculture, Institute of Food and Nutrition Development, Haidian, Beijing, China
| | - Aili Wang
- Department of Food Science and Technology, Virginia Polytechnic Institute and State University (Virginia Tech), Blacksburg, Virginia, USA
| | - Zaigui Li
- College of Food Science and Nutritional Engineering, China Agricultural University, Haidian, Beijing, China
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Han S, Zhang W, Zhang R, Jiao J, Fu C, Tong X, Zhang W, Qin L. Cereal fiber improves blood cholesterol profiles and modulates intestinal cholesterol metabolism in C57BL/6 mice fed a high-fat, high-cholesterol diet. Food Nutr Res 2019; 63:1591. [PMID: 30863273 PMCID: PMC6403461 DOI: 10.29219/fnr.v63.1591] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 12/24/2018] [Accepted: 12/29/2018] [Indexed: 01/06/2023] Open
Abstract
Background Dietary intake of cereal fiber has been reported to benefit lipid metabolism through multiple mechanisms. The present study aimed to discover the potential mechanisms by which cereal fiber could modify the intestinal cholesterol metabolism. Design Male C57BL/6 mice were fed a reference chow (RC) diet; high-fat, high-cholesterol (HFC) diet; HFC plus oat fiber diet; or HFC plus wheat bran fiber diet for 24 weeks. Serum lipids were measured by enzymatic methods. Western blot was used to determine the protein expressions involved in intestinal cholesterol metabolism. Results Our results showed that HFC-induced elevations of serum triglycerides, total cholesterol, and low-density lipoprotein cholesterol were normalized in both groups that received cereal fiber. At the protein level, compared with the HFC diet group, the two cereal fibers, especially the oat fiber, significantly increased the protein expression of peroxisome proliferator-activated receptor alpha, liver X receptor alpha, sterol regulatory element-binding protein (SREBP) 2, low-density lipoprotein receptor, adenosine triphosphate (ATP)-binding cassette A1, and ATP-binding cassette G1, while decreasing the protein expression of Niemann-Pick C1-like protein 1, SREBP-1, fatty acid synthase, and acetyl-coenzyme A carboxylase, which were involved in intestinal cholesterol metabolism. Conclusion Taken together, increased intake of cereal fiber improved blood cholesterol profiles and increased the intestinal cholesterol efflux and cholesterol clearance in C57BL/6 mice fed a HFC diet. Oat fiber had a stronger effect than wheat bran fiber on cholesterol metabolism by modulating the PPARα, LXRα, and SREBP signaling pathways.
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Affiliation(s)
- Shufen Han
- Department of Nutrition and Food Hygiene, Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Disease, School of Public Health, Soochow University, Suzhou, China
| | - Wei Zhang
- Department of Nutrition and Food Hygiene, Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Disease, School of Public Health, Soochow University, Suzhou, China.,Suzhou Maternal and Child Health Care and Family Planning Service Center, Suzhou, China
| | - Ru Zhang
- Department of Nutrition and Food Hygiene, Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Disease, School of Public Health, Soochow University, Suzhou, China
| | - Jun Jiao
- Department of Nutrition and Food Hygiene, Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Disease, School of Public Health, Soochow University, Suzhou, China
| | - Chunling Fu
- Department of Nutrition and Food Hygiene, Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Disease, School of Public Health, Soochow University, Suzhou, China
| | - Xing Tong
- Department of Nutrition and Food Hygiene, Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Disease, School of Public Health, Soochow University, Suzhou, China
| | | | - Liqiang Qin
- Department of Nutrition and Food Hygiene, Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Disease, School of Public Health, Soochow University, Suzhou, China
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14
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Camargo ACL, Constantino FB, Santos SAA, Colombelli KT, Dal-Pai-Silva M, Felisbino SL, Justulin LA. Influence of postnatal prolactin modulation on the development and maturation of ventral prostate in young rats. Reprod Fertil Dev 2017; 30:969-979. [PMID: 29207253 DOI: 10.1071/rd17343] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Accepted: 11/15/2017] [Indexed: 11/23/2022] Open
Abstract
Besides androgenic dependence, other hormones also influence the prostate biology. Prolactin has been described as an important hormone associated with maintenance of prostatic morphophysiology; however, there is a lack of information on the involvement of prolactin during prostate development and growth. This study aimed to evaluate whether perinatal prolactin modulation interferes with rat ventral prostate (VP) development and maturation. Therefore, prolactin or bromocriptine (an inhibitor of prolactin release from the pituitary) were administered to Sprague Dawley rats from postnatal Day (PND) 12 to PND 21 or 35. Animals were then killed and serum hormonal quantification, VP morphological-stereological and immunohistochemical analyses and western blotting reactions were employed. Our results demonstrate that prolactin blockage increased serum testosterone on PND 21, which reflected an increase in anogenital distance. Although prolactin modulation did not interfere with VP weight, it modified VP morphology by dilating the acinar lumen and reducing epithelial cell height. Prolactin activated the signal transducer and activator of transcription (STAT) downstream pathway, increased androgen receptor expression and epithelial proliferation. In addition, prolactin and bromocriptine also increased expression of cytokeratin 18, a marker of luminal-differentiated cells. In conclusion, the VP responds to prolactin modulation through a mechanism of increasing the epithelial proliferative response and dynamics of cell differentiation, especially in animals treated for a more prolonged period.
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Affiliation(s)
- Ana C L Camargo
- Department of Morphology, Institute of Biosciences, Sao Paulo State University, Prof. Dr. Antonio Celso Wagner Zanin Street, 250, Botucatu, SP, 18618-689, Brazil
| | - Flávia B Constantino
- Department of Morphology, Institute of Biosciences, Sao Paulo State University, Prof. Dr. Antonio Celso Wagner Zanin Street, 250, Botucatu, SP, 18618-689, Brazil
| | - Sérgio A A Santos
- Department of Morphology, Institute of Biosciences, Sao Paulo State University, Prof. Dr. Antonio Celso Wagner Zanin Street, 250, Botucatu, SP, 18618-689, Brazil
| | - Ketlin T Colombelli
- Department of Morphology, Institute of Biosciences, Sao Paulo State University, Prof. Dr. Antonio Celso Wagner Zanin Street, 250, Botucatu, SP, 18618-689, Brazil
| | - Maeli Dal-Pai-Silva
- Department of Morphology, Institute of Biosciences, Sao Paulo State University, Prof. Dr. Antonio Celso Wagner Zanin Street, 250, Botucatu, SP, 18618-689, Brazil
| | | | - Luis A Justulin
- Department of Morphology, Institute of Biosciences, Sao Paulo State University, Prof. Dr. Antonio Celso Wagner Zanin Street, 250, Botucatu, SP, 18618-689, Brazil
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15
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Engin A. Diet-Induced Obesity and the Mechanism of Leptin Resistance. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 960:381-397. [PMID: 28585208 DOI: 10.1007/978-3-319-48382-5_16] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Leptin signaling blockade by chronic overstimulation of the leptin receptor or hypothalamic pro-inflammatory responses due to elevated levels of saturated fatty acid can induce leptin resistance by activating negative feedback pathways. Although, long form leptin receptor (Ob-Rb) initiates leptin signaling through more than seven different signal transduction pathways, excessive suppressor of cytokine signaling-3 (SOCS-3) activity is a potential mechanism for the leptin resistance that characterizes human obesity. Because the leptin-responsive metabolic pathways broadly integrate with other neurons to control energy balance, the methods used to counteract the leptin resistance has extremely limited effect. In this chapter, besides the impairment of central and peripheral leptin signaling pathways, limited access of leptin to central nervous system (CNS) through blood-brain barrier, mismatch between high leptin and the amount of leptin receptor expression, contradictory effects of cellular and circulating molecules on leptin signaling, the connection between leptin signaling and endoplasmic reticulum (ER) stress and self-regulation of leptin signaling has been discussed in terms of leptin resistance.
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Affiliation(s)
- Atilla Engin
- Faculty of Medicine, Department of General Surgery, Gazi University, Besevler, Ankara, Turkey.
- , Mustafa Kemal Mah. 2137. Sok. 8/14, 06520, Cankaya, Ankara, Turkey.
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