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Kagawa T, Yamaoka I. Intragastric infusion of a liquid diet with low-methoxyl pectin alleviates fecal inconsistency and local proinflammatory cytokine expression in lipopolysaccharide-septic rats. Nutrition 2024; 118:112271. [PMID: 38043391 DOI: 10.1016/j.nut.2023.112271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 10/16/2023] [Accepted: 10/21/2023] [Indexed: 12/05/2023]
Abstract
OBJECTIVE Diarrhea interrupts enteral nutrition management in hospitalized patients with severe illnesses, such as sepsis. Pectin, a water-soluble dietary fiber, has the potential to maintain intestinal function and may reduce inflammatory reactions. The aim of this study was to demonstrate that the addition of low-methoxyl (LM) pectin to a liquid diet suppresses softening of stool texture and reduces tissue inflammatory responses in enteral nutrition management during sepsis. METHODS A fat-enriched liquid diet with LM pectin (P-EN) or a liquid diet without dietary fiber (FF-EN) was given continuously to rats through a gastric catheter. Lipopolysaccharide (LPS; 10 mg/kg) was injected intraperitoneally 24 h (study 1) and 7 h (study 2) before sacrifice. RESULTS LPS injection significantly worsened fecal property scores in rats infused with FF-EN compared with the rats given P-EN in study 1. Whereas many myeloperoxidase-positive cells infiltrated the liver, and the hepatic expressions of chemokine genes were markedly elevated 24 h after LPS administration, these findings were clearly alleviated in the LM pectin-containing liquid diet group. In study 2, protein expressions of proinflammatory cytokines, such as small intestinal tumor necrosis factor-α and hepatic interleukin-1β, and interleukin-6, were significantly downregulated in the P-EN LPS group compared with the FF-EN LPS group. CONCLUSIONS A liquid diet containing LM pectin allows enteral nutrition management with a low risk for diarrhea and reduces local inflammation under septic conditions.
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Affiliation(s)
- Tomohiro Kagawa
- Medical Foods Research Institute, OS-1 Division, Otsuka Pharmaceutical Factory, Inc., Tateiwa, Muya-cho, Naruto, Tokushima, Japan
| | - Ippei Yamaoka
- Medical Foods Research Institute, OS-1 Division, Otsuka Pharmaceutical Factory, Inc., Tateiwa, Muya-cho, Naruto, Tokushima, Japan.
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2
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Zhang Y, Aldamarany WAS, Deng L, Zhong G. Carbohydrate supplementation retains intestinal barrier and ameliorates bacterial translocation in an antibiotic-induced mouse model. Food Funct 2023; 14:8186-8200. [PMID: 37599609 DOI: 10.1039/d3fo01343j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/22/2023]
Abstract
Bacterial translocation (BT), with antibiotic use as an inducer, is associated with increased risk of developing multiple inflammatory disorders, and is closely associated with intestinal barrier integrity. Deacetylated konjac glucomannan (DKGM) and konjac oligo-glucomannan (KOGM) are two of the most widely used derivatives in the food industry. They are structurally and physiologically distinct from konjac glucomannan (KGM), and previous studies have confirmed their prebiotic effects. But whether they play a role in antibiotic-induced BT is unknown. Here, we applied an antibiotic cocktail (Abx) to a mouse model and investigated whether and how KGM and its derivatives function in BT and inflammation response amelioration during and after antibiotics, and which intervention plan is more effective. The results showed that KGM and its derivatives all inhibited BT. The colon tissue lesions caused by BT were largely alleviated, and short-chain fatty acid (SCFA) production was highly improved with the supplementation of carbohydrates. The prolonged intervention plan using KGM and its derivatives was more efficient than intervention only during the Abx administration period. Among the three dietary fibers, KGM behaved best, while DKGM and KOGM behaved equivalently. Additionally, KGM and its derivatives all reduced the inflammatory response accompanying BT, but DKGM may have a direct inhibitory efficacy in inflammation other than that through IL-10, unlike KGM or KOGM.
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Affiliation(s)
- Yuan Zhang
- College of Food Science, Southwest University, Chongqing, 400715, China.
- Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, Southwest University, Chongqing, 400715, China
| | - Waleed A S Aldamarany
- College of Food Science, Southwest University, Chongqing, 400715, China.
- Food Science and Technology Department, Faculty of Agriculture, Al-Azhar University (Assiut Branch), Assiut 71524, Egypt
| | - Liling Deng
- Chongqing Key Laboratory of High Active Traditional Chinese Drug Delivery System, Chongqing Engineering Research Center of Pharmaceutical Sciences, Chongqing Medical and Pharmaceutical College, Chongqing 401331, China
| | - Geng Zhong
- College of Food Science, Southwest University, Chongqing, 400715, China.
- Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, Southwest University, Chongqing, 400715, China
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3
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Jermendi É, Fernández-Lainez C, Beukema M, López-Velázquez G, van den Berg MA, de Vos P, Schols HA. TLR 2/1 interaction of pectin depends on its chemical structure and conformation. Carbohydr Polym 2023; 303:120444. [PMID: 36657837 DOI: 10.1016/j.carbpol.2022.120444] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 11/18/2022] [Accepted: 12/05/2022] [Indexed: 12/14/2022]
Abstract
Citrus pectins have demonstrated health benefits through direct interaction with Toll-like receptor 2. Methyl-ester distribution patterns over the homogalacturonan were found to contribute to such immunomodulatory activity, therefore molecular interactions with TLR2 were studied. Molecular-docking analysis was performed using four GalA-heptamers, GalA7Me0, GalA7Me1,6, GalA7Me1,7 and GalA7Me2,5. The molecular relations were measured in various possible conformations. Furthermore, commercial citrus pectins were characterized by enzymatic fingerprinting using polygalacturonase and pectin-lyase to determine their methyl-ester distribution patterns. The response of 12 structurally different pectic polymers on TLR2 binding and the molecular docking with four pectic oligomers clearly demonstrated interactions with human-TLR2 in a structure-dependent way, where blocks of (non)methyl-esterified GalA were shown to inhibit TLR2/1 dimerization. Our results may be used to understand the immunomodulatory effects of certain pectins via TLR2. Knowledge of how pectins with certain methyl-ester distribution patterns bind to TLRs may lead to tailored pectins to prevent inflammation.
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Affiliation(s)
- Éva Jermendi
- Laboratory of Food Chemistry, Wageningen University, Bornse Weilanden 9, 6708, WG, Wageningen, the Netherlands.
| | - Cynthia Fernández-Lainez
- Immunoendocrinology, Division of Medical Biology, Department of Pathology and Medical Biology, University Medical Center Groningen, Hanzeplein 1, 9713, GZ, Groningen, the Netherlands; Laboratorio de Errores Innatos del Metabolismo y Tamiz, Instituto Nacional de Pediatría, Av. Imán 1, piso 9, col. Insurgentes Cuicuilco 04530, Ciudad de México, Mexico.
| | - Martin Beukema
- Immunoendocrinology, Division of Medical Biology, Department of Pathology and Medical Biology, University Medical Center Groningen, Hanzeplein 1, 9713, GZ, Groningen, the Netherlands.
| | - Gabriel López-Velázquez
- Laboratorio de Biomoléculas y Salud Infantil, Instituto Nacional de Pediatría, Av. Imán 1, piso 5, col. Insurgentes Cuicuilco 04530, Ciudad de México, Mexico.
| | - Marco A van den Berg
- DSM Food & Beverages, Alexander Fleminglaan 1, 2613, AX, Delft, the Netherlands.
| | - Paul de Vos
- Immunoendocrinology, Division of Medical Biology, Department of Pathology and Medical Biology, University Medical Center Groningen, Hanzeplein 1, 9713, GZ, Groningen, the Netherlands.
| | - Henk A Schols
- Laboratory of Food Chemistry, Wageningen University, Bornse Weilanden 9, 6708, WG, Wageningen, the Netherlands.
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Thirion F, Da Silva K, Plaza Oñate F, Alvarez A, Thabuis C, Pons N, Berland M, Le Chatelier E, Galleron N, Levenez F, Vergara C, Chevallier H, Guérin‐Deremaux L, Doré J, Ehrlich SD. Diet Supplementation with NUTRIOSE, a Resistant Dextrin, Increases the Abundance of Parabacteroides distasonis in the Human Gut. Mol Nutr Food Res 2022; 66:e2101091. [PMID: 35312171 PMCID: PMC9287035 DOI: 10.1002/mnfr.202101091] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 02/25/2022] [Indexed: 12/18/2022]
Abstract
SCOPE An imbalance of the gut microbiota ("dysbiosis") is associated with numerous chronic diseases, and its modulation is a promising novel therapeutic approach. Dietary supplementation with soluble fiber is one of several proposed modulation strategies. This study aims at confirming the impact of the resistant dextrin NUTRIOSE (RD), a soluble fiber with demonstrated beneficial health effects, on the gut microbiota of healthy individuals. METHODS AND RESULTS Fifty healthy women are enrolled and supplemented daily with either RD (n = 24) or a control product (n = 26) during 6 weeks. Characterization of the fecal metagenome with shotgun sequencing reveals that RD intake dramatically increases the abundance of the commensal bacterium Parabacteroides distasonis. Furthermore, presence in metagenomes of accessory genes from P. distasonis, coding for susCD (a starch-binding membrane protein complex) is associated with a greater increase of the species. This suggests that response to RD might be strain-dependent. CONCLUSION Supplementation with RD can be used to specifically increase P. distasonis in gut microbiota of healthy women. The magnitude of the response may be associated with fiber-metabolizing capabilities of strains carried by subjects. Further research will seek to confirm that P. distasonis directly modulates the clinical effects observed in other studies.
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Affiliation(s)
| | | | | | | | | | - Nicolas Pons
- INRAEMGPUniversité Paris‐SaclayJouy‐en‐Josas78350France
| | | | | | | | | | | | | | | | - Joël Doré
- INRAEMGPUniversité Paris‐SaclayJouy‐en‐Josas78350France
- INRAEAgroParisTechMicalis InstituteUniversité Paris‐SaclayJouy‐en‐Josas78350France
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5
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Yusuf K, Saha S, Umar S. Health Benefits of Dietary Fiber for the Management of Inflammatory Bowel Disease. Biomedicines 2022; 10:1242. [PMID: 35740264 PMCID: PMC9220141 DOI: 10.3390/biomedicines10061242] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 05/18/2022] [Accepted: 05/23/2022] [Indexed: 02/07/2023] Open
Abstract
Crohn's disease (CD) and ulcerative colitis (UC), two components of inflammatory bowel disease (IBD), are painful conditions that affect children and adults. Despite substantial research, there is no permanent cure for IBD, and patients face an increased risk of colon cancer. Dietary fiber's health advantages have been thoroughly investigated, and it is recommended for its enormous health benefits. This review article discusses the importance of appropriate fiber intake in managing IBD, emphasizing how optimal fiber consumption can significantly help IBD patients.
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Affiliation(s)
- Kafayat Yusuf
- Department of Surgery, University of Kansas Medical Center, 3901 Rainbow Blvd, 4028 Wahl Hall East, Kansas City, KS 66160, USA;
| | - Subhrajit Saha
- Department of Radiation Oncology, University of Kansas Medical Center, 3901 Rainbow Blvd, Kansas City, KS 66160, USA;
| | - Shahid Umar
- Department of Surgery, University of Kansas Medical Center, 3901 Rainbow Blvd, 4028 Wahl Hall East, Kansas City, KS 66160, USA;
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Brandl B, Rennekamp R, Reitmeier S, Pietrynik K, Dirndorfer S, Haller D, Hofmann T, Skurk T, Hauner H. Offering Fiber-Enriched Foods Increases Fiber Intake in Adults With or Without Cardiometabolic Risk: A Randomized Controlled Trial. Front Nutr 2022; 9:816299. [PMID: 35252300 PMCID: PMC8890034 DOI: 10.3389/fnut.2022.816299] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 01/17/2022] [Indexed: 12/18/2022] Open
Abstract
Introduction Previous efforts to increase fiber intake in the general population were disappointing despite growing awareness of the multiple benefits of a high fiber intake. Aim of the study was to investigate the acceptance and consumption of fiber-enriched foods. Methods One hundred and fifteen middle-aged healthy individuals with and without elevated waist circumference (> 102 cm in males and > 88 cm in females) were recruited and randomized to an intervention or an age- and sex-matched control group. Subjects assigned to the intervention group were invited to select fiber-enriched foods from a broad portfolio of products to increase fiber intake by 10 g/day. Control subjects could choose items from the same food basket without fiber enrichment. The primary outcome was the increase in dietary fiber intake, and secondary outcomes were changes in cardiometabolic risk factors, microbiota composition, food choices, and consumer acceptance of the fiber-enriched foods. Results Compared to baseline, daily fiber intake increased from 22.5 ± 8.0 to 34.0 ± 9.6 g/day after 4 weeks (p < 0.001) and to 36.0 ± 8.9 g/day after 12 weeks (p < 0.001) in the intervention group, whereas fiber intake remained unchanged in the control group. Participants rated the taste of the food products as pleasant without group differences. In both groups, the most liked foods included popular convenience foods such as pretzel breadstick, pizza salami, and pizza vegetarian. After 12 weeks of intervention, there were minor improvements in plasma lipids and parameters of glucose metabolism in both the intervention and control group compared to baseline, but no differences between the two groups. Increased fiber consumption resulted in an increased (p < 0.001) relative abundance of Tannerellaceae. Conclusions Fiber-enrichment of popular foods increases fiber intake in a middle-aged population with and without cardiometabolic risk and may provide a simple, novel strategy to increase fiber intake in the population.
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Affiliation(s)
- Beate Brandl
- ZIEL-Institute for Food and Health, Technical University of Munich, Freising, Germany
- Chair of Nutritional Medicine, Else Kroener-Fresenius-Centre for Nutritional Medicine, TUM School of Life Sciences, Technical University of Munich, Freising, Germany
| | - Rachel Rennekamp
- Chair of Nutritional Medicine, Else Kroener-Fresenius-Centre for Nutritional Medicine, TUM School of Life Sciences, Technical University of Munich, Freising, Germany
| | - Sandra Reitmeier
- ZIEL-Institute for Food and Health, Technical University of Munich, Freising, Germany
| | - Katarzyna Pietrynik
- Chair of Nutritional Medicine, Else Kroener-Fresenius-Centre for Nutritional Medicine, TUM School of Life Sciences, Technical University of Munich, Freising, Germany
| | - Sebastian Dirndorfer
- Chair of Food Chemistry and Molecular Sensory Science, TUM School of Life Sciences, Technical University of Munich, Freising, Germany
| | - Dirk Haller
- ZIEL-Institute for Food and Health, Technical University of Munich, Freising, Germany
- Chair of Nutrition and Immunology, Technical University of Munich, Freising, Germany
| | - Thomas Hofmann
- Chair of Food Chemistry and Molecular Sensory Science, TUM School of Life Sciences, Technical University of Munich, Freising, Germany
| | - Thomas Skurk
- ZIEL-Institute for Food and Health, Technical University of Munich, Freising, Germany
- Chair of Nutritional Medicine, Else Kroener-Fresenius-Centre for Nutritional Medicine, TUM School of Life Sciences, Technical University of Munich, Freising, Germany
| | - Hans Hauner
- Chair of Nutritional Medicine, Else Kroener-Fresenius-Centre for Nutritional Medicine, TUM School of Life Sciences, Technical University of Munich, Freising, Germany
- Institute of Nutritional Medicine, School of Medicine, Technical University of Munich, Munich, Germany
- *Correspondence: Hans Hauner
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7
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Zhang S, Waterhouse GIN, Xu F, He Z, Du Y, Lian Y, Wu P, Sun-Waterhouse D. Recent advances in utilization of pectins in biomedical applications: a review focusing on molecular structure-directing health-promoting properties. Crit Rev Food Sci Nutr 2021:1-34. [PMID: 34637646 DOI: 10.1080/10408398.2021.1988897] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The numerous health benefits of pectins justify their inclusion in human diets and biomedical products. This review provides an overview of pectin extraction and modification methods, their physico-chemical characteristics, health-promoting properties, and pharmaceutical/biomedical applications. Pectins, as readily available and versatile biomolecules, can be tailored to possess specific functionalities for food, pharmaceutical and biomedical applications, through judicious selection of appropriate extraction and modification technologies/processes based on green chemistry principles. Pectin's structural and physicochemical characteristics dictate their effects on digestion and bioavailability of nutrients, as well as health-promoting properties including anticancer, immunomodulatory, anti-inflammatory, intestinal microflora-regulating, immune barrier-strengthening, hypercholesterolemia-/arteriosclerosis-preventing, anti-diabetic, anti-obesity, antitussive, analgesic, anticoagulant, and wound healing effects. HG, RG-I, RG-II, molecular weight, side chain pattern, and degrees of methylation, acetylation, amidation and branching are critical structural elements responsible for optimizing these health benefits. The physicochemical characteristics, health functionalities, biocompatibility and biodegradability of pectins enable the construction of pectin-based composites with distinct properties for targeted applications in bioactive/drug delivery, edible films/coatings, nano-/micro-encapsulation, wound dressings and biological tissue engineering. Achieving beneficial synergies among the green extraction and modification processes during pectin production, and between pectin and other composite components in biomedical products, should be key foci for future research.
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Affiliation(s)
- Shikai Zhang
- College of Food Science and Engineering, Shandong Agricultural University, Taian, China
| | | | - Fangzhou Xu
- College of Food Science and Engineering, Shandong Agricultural University, Taian, China
| | - Ziyang He
- College of Food Science and Engineering, Shandong Agricultural University, Taian, China
| | - Yuyi Du
- College of Food Science and Engineering, Shandong Agricultural University, Taian, China
| | - Yujing Lian
- College of Food Science and Engineering, Shandong Agricultural University, Taian, China
| | - Peng Wu
- College of Food Science and Engineering, Shandong Agricultural University, Taian, China
| | - Dongxiao Sun-Waterhouse
- College of Food Science and Engineering, Shandong Agricultural University, Taian, China.,School of Chemical Sciences, The University of Auckland, Auckland, New Zealand
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8
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Gasaly N, de Vos P, Hermoso MA. Impact of Bacterial Metabolites on Gut Barrier Function and Host Immunity: A Focus on Bacterial Metabolism and Its Relevance for Intestinal Inflammation. Front Immunol 2021; 12:658354. [PMID: 34122415 PMCID: PMC8187770 DOI: 10.3389/fimmu.2021.658354] [Citation(s) in RCA: 205] [Impact Index Per Article: 68.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Accepted: 04/29/2021] [Indexed: 12/13/2022] Open
Abstract
The diverse and dynamic microbial community of the human gastrointestinal tract plays a vital role in health, with gut microbiota supporting the development and function of the gut immune barrier. Crosstalk between microbiota-gut epithelium and the gut immune system determine the individual health status, and any crosstalk disturbance may lead to chronic intestinal conditions, such as inflammatory bowel diseases (IBD) and celiac disease. Microbiota-derived metabolites are crucial mediators of host-microbial interactions. Some beneficially affect host physiology such as short-chain fatty acids (SCFAs) and secondary bile acids. Also, tryptophan catabolites determine immune responses, such as through binding to the aryl hydrocarbon receptor (AhR). AhR is abundantly present at mucosal surfaces and when activated enhances intestinal epithelial barrier function as well as regulatory immune responses. Exogenous diet-derived indoles (tryptophan) are a major source of endogenous AhR ligand precursors and together with SCFAs and secondary bile acids regulate inflammation by lowering stress in epithelium and gut immunity, and in IBD, AhR expression is downregulated together with tryptophan metabolites. Here, we present an overview of host microbiota-epithelium- gut immunity crosstalk and review how microbial-derived metabolites contribute to host immune homeostasis. Also, we discuss the therapeutic potential of bacterial catabolites for IBD and celiac disease and how essential dietary components such as dietary fibers and bacterial tryptophan catabolites may contribute to intestinal and systemic homeostasis.
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Affiliation(s)
- Naschla Gasaly
- Laboratory of Innate Immunity, Program of Immunology, Institute of Biomedical Sciences, Faculty of Medicine, Universidad de Chile, Santiago, Chile
| | - Paul de Vos
- Immunoendocrinology, Division of Medical Biology, Department of Pathology and Medical Biology, University Medical Center Groningen, Groningen, Netherlands
| | - Marcela A Hermoso
- Laboratory of Innate Immunity, Program of Immunology, Institute of Biomedical Sciences, Faculty of Medicine, Universidad de Chile, Santiago, Chile.,Advanced Center for Chronic Diseases (ACCDiS), Universidad de Chile, Santiago, Chile
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9
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Li D, Bai X, Jiang Y, Cheng Y. Butyrate alleviates PTZ-induced mitochondrial dysfunction, oxidative stress and neuron apoptosis in mice via Keap1/Nrf2/HO-1 pathway. Brain Res Bull 2020; 168:25-35. [PMID: 33359640 DOI: 10.1016/j.brainresbull.2020.12.009] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2020] [Revised: 12/09/2020] [Accepted: 12/15/2020] [Indexed: 12/12/2022]
Abstract
This study aims to evaluate the neuroprotective effect of sodium butyrate against the pentylenetetrazol (PTZ)-induced kindling epilepsy. Sodium butyrate (SB) (5, 10 and 20 mg/kg) and sodium valproate for 40 days and PTZ (37 mg/kg) injection every day were conducted for Kunming mice, to investigate seizure intensity and latency, oxidative stress parameters, mitochondrial structure and function, histopathology, and Keap1/Nrf2/HO-1 expressions. It is shown that seizure latency was effectively increased and the intensity of seizures decreased by treatment with sodium butyrate. It was also found to reverse the structural disruption of the mitochondria, reduce the ROS level and improve the levels of NAD + and ATP in the brains of epileptic mice. Furthermore, pretreatment with SB led to an increase in antioxidant enzyme activity (CAT, SOD and GSH-PX) in the brain as well as conferred a neuroprotective effect against neuron loss and apoptosis. The activation of Keap1/Nrf2/HO-1 signals was also identified, in which the antiepileptic effect of SB may be partially due to its anti-mitochondrial injury and neuroprotective activities. Accordingly, the results of a series of functional tests indicate a significant improvement of neurological function following SB treatment. In a mouse model of seizures, brain injury and neurological deficits can be attenuated by treatment with butyrate through the activation of Nrf2 pathway and the improvement of mitochondrial function.
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Affiliation(s)
- Dongyue Li
- Hong Kong Baptist University, Hong Kong, PR China
| | - Xinying Bai
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, Wuhan University School of Pharmaceutical Sciences, Wuhan University, Wuhan, Hubei, PR China
| | - Yuan Jiang
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, Wuhan University School of Pharmaceutical Sciences, Wuhan University, Wuhan, Hubei, PR China
| | - Yahong Cheng
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, Wuhan University School of Pharmaceutical Sciences, Wuhan University, Wuhan, Hubei, PR China.
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10
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Beukema M, Faas MM, de Vos P. The effects of different dietary fiber pectin structures on the gastrointestinal immune barrier: impact via gut microbiota and direct effects on immune cells. Exp Mol Med 2020; 52:1364-1376. [PMID: 32908213 PMCID: PMC8080816 DOI: 10.1038/s12276-020-0449-2] [Citation(s) in RCA: 136] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 03/31/2020] [Accepted: 04/27/2020] [Indexed: 12/25/2022] Open
Abstract
Pectins are dietary fibers with different structural characteristics. Specific pectin structures can influence the gastrointestinal immune barrier by directly interacting with immune cells or by impacting the intestinal microbiota. The impact of pectin strongly depends on the specific structural characteristics of pectin; for example, the degree of methyl-esterification, acetylation and rhamnogalacturonan I or rhamnogalacturonan II neutral side chains. Here, we review the interactions of specific pectin structures with the gastrointestinal immune barrier. The effects of pectin include strengthening the mucus layer, enhancing epithelial integrity, and activating or inhibiting dendritic cell and macrophage responses. The direct interaction of pectins with the gastrointestinal immune barrier may be governed through pattern recognition receptors, such as Toll-like receptors 2 and 4 or Galectin-3. In addition, specific pectins can stimulate the diversity and abundance of beneficial microbial communities. Furthermore, the gastrointestinal immune barrier may be enhanced by short-chain fatty acids. Moreover, pectins can enhance the intestinal immune barrier by favoring the adhesion of commensal bacteria and inhibiting the adhesion of pathogens to epithelial cells. Current data illustrate that pectin may be a powerful dietary fiber to manage and prevent several inflammatory conditions, but additional human studies with pectin molecules with well-defined structures are urgently needed.
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Affiliation(s)
- Martin Beukema
- Immunoendocrinology, Division of Medical Biology, Department of Pathology and Medical Biology, University Medical Centre Groningen, Hanzeplein 1, 9713 GZ, Groningen, The Netherlands.
| | - Marijke M Faas
- Immunoendocrinology, Division of Medical Biology, Department of Pathology and Medical Biology, University Medical Centre Groningen, Hanzeplein 1, 9713 GZ, Groningen, The Netherlands
| | - Paul de Vos
- Immunoendocrinology, Division of Medical Biology, Department of Pathology and Medical Biology, University Medical Centre Groningen, Hanzeplein 1, 9713 GZ, Groningen, The Netherlands
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11
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Epiphanies of well-known and newly discovered macromolecular carbohydrates – A review. Int J Biol Macromol 2020; 156:51-66. [DOI: 10.1016/j.ijbiomac.2020.04.046] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Revised: 03/08/2020] [Accepted: 04/03/2020] [Indexed: 12/16/2022]
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12
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Free Fatty Acid Receptors 2 and 3 as Microbial Metabolite Sensors to Shape Host Health: Pharmacophysiological View. Biomedicines 2020; 8:biomedicines8060154. [PMID: 32521775 PMCID: PMC7344995 DOI: 10.3390/biomedicines8060154] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 05/30/2020] [Accepted: 06/01/2020] [Indexed: 12/13/2022] Open
Abstract
The role of the gut microbiome in human health is becoming apparent. The major functional impact of the gut microbiome is transmitted through the microbial metabolites that are produced in the gut and interact with host cells either in the local gut environment or are absorbed into circulation to impact distant cells/organs. Short-chain fatty acids (SCFAs) are the major microbial metabolites that are produced in the gut through the fermentation of non-digestible fibers. SCFAs are known to function through various mechanisms, however, their signaling through free fatty acid receptors 2 and 3 (FFAR2/3; type of G-coupled protein receptors) is a new therapeutic approach. FFAR2/3 are widely expressed in diverse cell types in human and mice, and function as sensors of SCFAs to change several physiological and cellular functions. FFAR2/3 modulate neurological signaling, energy metabolism, intestinal cellular homeostasis, immune response, and hormone synthesis. FFAR2/3 function through Gi and/or Gq signaling, that is mediated through specific structural features of SCFAs-FFAR2/3 bindings and modulating specific signaling pathway. In this review, we discuss the wide-spread expression and structural homologies between human and mice FFAR2/3, and their role in different human health conditions. This information can unlock opportunities to weigh the potential of FFAR2/3 as a drug target to prevent human diseases.
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13
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Khalili H, Chan SSM, Lochhead P, Ananthakrishnan AN, Hart AR, Chan AT. The role of diet in the aetiopathogenesis of inflammatory bowel disease. Nat Rev Gastroenterol Hepatol 2018; 15:525-535. [PMID: 29789682 PMCID: PMC6397648 DOI: 10.1038/s41575-018-0022-9] [Citation(s) in RCA: 171] [Impact Index Per Article: 28.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Crohn's disease and ulcerative colitis, collectively known as IBD, are chronic inflammatory disorders of the gastrointestinal tract. Although the aetiopathogenesis of IBD is largely unknown, it is widely thought that diet has a crucial role in the development and progression of IBD. Indeed, epidemiological and genetic association studies have identified a number of promising dietary and genetic risk factors for IBD. These preliminary studies have led to major interest in investigating the complex interaction between diet, host genetics, the gut microbiota and immune function in the pathogenesis of IBD. In this Review, we discuss the recent epidemiological, gene-environment interaction, microbiome and animal studies that have explored the relationship between diet and the risk of IBD. In addition, we highlight the limitations of these prior studies, in part by explaining their contradictory findings, and review future directions.
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Affiliation(s)
- Hamed Khalili
- Division of Gastroenterology, Massachusetts General Hospital and Harvard Medical School.,Clinical and Translational Epidemiology Unit, Massachusetts General Hospital and Harvard Medical School, Boston MA, USA
| | - Simon S. M. Chan
- Department of Medicine, Norwich Medical School, University of East Anglia, Norwich, United Kingdom.,Department of Gastroenterology, Norfolk and Norwich University Hospital NHS Trust, Norwich, United Kingdom
| | - Paul Lochhead
- Division of Gastroenterology, Massachusetts General Hospital and Harvard Medical School
| | - Ashwin N. Ananthakrishnan
- Division of Gastroenterology, Massachusetts General Hospital and Harvard Medical School.,Clinical and Translational Epidemiology Unit, Massachusetts General Hospital and Harvard Medical School, Boston MA, USA
| | - Andrew R. Hart
- Department of Medicine, Norwich Medical School, University of East Anglia, Norwich, United Kingdom.,Department of Gastroenterology, Norfolk and Norwich University Hospital NHS Trust, Norwich, United Kingdom
| | - Andrew T. Chan
- Division of Gastroenterology, Massachusetts General Hospital and Harvard Medical School.,Clinical and Translational Epidemiology Unit, Massachusetts General Hospital and Harvard Medical School, Boston MA, USA.,Channing Division of Network Medicine, Harvard Medical School, Boston MA, USA.,Broad Institute, Cambridge MA, USA.,
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14
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Sahasrabudhe NM, Beukema M, Tian L, Troost B, Scholte J, Bruininx E, Bruggeman G, van den Berg M, Scheurink A, Schols HA, Faas MM, de Vos P. Dietary Fiber Pectin Directly Blocks Toll-Like Receptor 2-1 and Prevents Doxorubicin-Induced Ileitis. Front Immunol 2018; 9:383. [PMID: 29545800 PMCID: PMC5839092 DOI: 10.3389/fimmu.2018.00383] [Citation(s) in RCA: 104] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Accepted: 02/12/2018] [Indexed: 12/14/2022] Open
Abstract
Dietary carbohydrate fibers are known to prevent immunological diseases common in Western countries such as allergy and asthma but the underlying mechanisms are largely unknown. Until now beneficial effects of dietary fibers are mainly attributed to fermentation products of the fibers such as anti-inflammatory short-chain fatty acids (SCFAs). Here, we found and present a new mechanism by which dietary fibers can be anti-inflammatory: a commonly consumed fiber, pectin, blocks innate immune receptors. We show that pectin binds and inhibits, toll-like receptor 2 (TLR2) and specifically inhibits the proinflammatory TLR2-TLR1 pathway while the tolerogenic TLR2-TLR6 pathway remains unaltered. This effect is most pronounced with pectins having a low degree of methyl esterification (DM). Low-DM pectin interacts with TLR2 through electrostatic forces between non-esterified galacturonic acids on the pectin and positive charges on the TLR2 ectodomain, as confirmed by testing pectin binding on mutated TLR2. The anti-inflammatory effect of low-DM pectins was first studied in human dendritic cells and mouse macrophages in vitro and was subsequently tested in vivo in TLR2-dependent ileitis in a mouse model. In these mice, ileitis was prevented by pectin administration. Protective effects were shown to be TLR2-TLR1 dependent and independent of the SCFAs produced by the gut microbiota. These data suggest that low-DM pectins as a source of dietary fiber can reduce inflammation through direct interaction with TLR2-TLR1 receptors.
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Affiliation(s)
- Neha M. Sahasrabudhe
- Immunoendocrinology, Division of Medical Biology, Department of Pathology and Medical Biology, University Medical Center Groningen, Groningen, Netherlands
| | - Martin Beukema
- Immunoendocrinology, Division of Medical Biology, Department of Pathology and Medical Biology, University Medical Center Groningen, Groningen, Netherlands
| | - Lingmin Tian
- Laboratory of Food Chemistry, Wageningen University, Wageningen, Netherlands
| | - Berit Troost
- Immunoendocrinology, Division of Medical Biology, Department of Pathology and Medical Biology, University Medical Center Groningen, Groningen, Netherlands
| | - Jan Scholte
- Faculty of Mathematics and Natural Sciences, Neuroendocrinology, Groningen Institute for Evolutionary Life Sciences, Groningen, Netherlands
| | - Erik Bruininx
- Agrifirm Innovation Center, Apeldoorn, Netherlands
- Animal Nutrition Group, Wageningen University, Wageningen, Netherlands
| | | | | | - Anton Scheurink
- Faculty of Mathematics and Natural Sciences, Neuroendocrinology, Groningen Institute for Evolutionary Life Sciences, Groningen, Netherlands
| | - Henk A. Schols
- Laboratory of Food Chemistry, Wageningen University, Wageningen, Netherlands
| | - Marijke M. Faas
- Immunoendocrinology, Division of Medical Biology, Department of Pathology and Medical Biology, University Medical Center Groningen, Groningen, Netherlands
- Department of Obstetrics and Gynaecology, University of Groningen, University Medical Center Groningen, Groningen, Netherlands
| | - Paul de Vos
- Immunoendocrinology, Division of Medical Biology, Department of Pathology and Medical Biology, University Medical Center Groningen, Groningen, Netherlands
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15
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Severi C, Carabotti M, Cicenia A, Pallotta L, Annibale B. Recent advances in understanding and managing diverticulitis. F1000Res 2018; 7:F1000 Faculty Rev-971. [PMID: 30026920 PMCID: PMC6039950 DOI: 10.12688/f1000research.14299.1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/21/2018] [Indexed: 02/05/2023] Open
Abstract
In the past few decades, the increasing socioeconomic burden of acute diverticulitis (AD) has become evident, and with the growth of the population age, this significant economic impact will likely continue to rise. Furthermore, recent evidence showed an increased rate of hospital admissions especially evident among women and younger individuals. The natural history and pathophysiology of this clinical condition is still to be fully defined, and efforts continue to be made in the identification of risk factors and the establishment of relative preventive strategies. The actual therapeutic strategies aimed to modulate gut microbiota, such as rifaximin or probiotics, or to reduce mucosal inflammation, such as mesalazine, present a relatively poor efficacy for both the prevention of the first AD episode (primary prevention) and its recurrence (secondary prevention). In the last few years, the main goal achieved has been in the management of AD in that uncomplicated AD can, to a larger extent, be managed in an outpatient setting with no or little supportive therapy, a strategy that will certainly impact on the health costs of this disease. The problem of AD recurrence remains a topic of debate. The aim of this review is to present updated evidence on AD epidemiology and relative open clinical questions and to analyze in detail predisposing and protective factors with an attempt to integrate their possible modes of action into the several pathogenic mechanisms that have been suggested to contribute to this multifactorial disease. A unifying hypothesis dealing with the colonic luminal and extra-luminal microenvironments separately is provided. Finally, evidence-based changes in therapeutic management will be summarized. Because of an ascertained multifactorial pathogenesis of uncomplicated and complicated AD, it is probable that a single 'causa prima' will not be identifiable, and a better stratification of patients could allow one to pursue tailored therapeutic algorithm strategies.
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Affiliation(s)
- Carola Severi
- Department of Internal Medicine and Medical Specialties, University Sapienza of Rome, Viale del Policlinico 155, 00161 Rome, Italy
| | - Marilia Carabotti
- Medical-Surgical Department of Clinical Sciences and Translational Medicine, University Hospital S. Andrea, University Sapienza of Rome, Via di Grottarossa 1035-1039, 00189 Roma, Italy
| | - Alessia Cicenia
- Department of Internal Medicine and Medical Specialties, University Sapienza of Rome, Viale del Policlinico 155, 00161 Rome, Italy
| | - Lucia Pallotta
- Department of Internal Medicine and Medical Specialties, University Sapienza of Rome, Viale del Policlinico 155, 00161 Rome, Italy
| | - Bruno Annibale
- Medical-Surgical Department of Clinical Sciences and Translational Medicine, University Hospital S. Andrea, University Sapienza of Rome, Via di Grottarossa 1035-1039, 00189 Roma, Italy
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16
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Wu RY, Määttänen P, Napper S, Scruten E, Li B, Koike Y, Johnson-Henry KC, Pierro A, Rossi L, Botts SR, Surette MG, Sherman PM. Non-digestible oligosaccharides directly regulate host kinome to modulate host inflammatory responses without alterations in the gut microbiota. MICROBIOME 2017; 5:135. [PMID: 29017607 PMCID: PMC5635512 DOI: 10.1186/s40168-017-0357-4] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Accepted: 09/28/2017] [Indexed: 05/24/2023]
Abstract
BACKGROUND Prebiotics are non-digestible food ingredients that enhance the growth of certain microbes within the gut microbiota. Prebiotic consumption generates immune-modulatory effects that are traditionally thought to reflect microbial interactions within the gut. However, recent evidence suggests they may also impart direct microbe-independent effects on the host, though the mechanisms of which are currently unclear. METHODS Kinome arrays were used to profile the host intestinal signaling responses to prebiotic exposures in the absence of microbes. Identified pathways were functionally validated in Caco-2Bbe1 intestinal cell line and in vivo model of murine endotoxemia. RESULTS We found that prebiotics directly regulate host mucosal signaling to alter response to bacterial infection. Intestinal epithelial cells (IECs) exposed to prebiotics are hyporesponsive to pathogen-induced mitogen-activated protein kinase (MAPK) and nuclear factor kappa B (NF-κB) activations, and have a kinome profile distinct from non-treated cells pertaining to multiple innate immune signaling pathways. Consistent with this finding, mice orally gavaged with prebiotics showed dampened inflammatory response to lipopolysaccharide (LPS) without alterations in the gut microbiota. CONCLUSIONS These findings provide molecular mechanisms of direct host-prebiotic interactions to support prebiotics as potent modulators of host inflammation.
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Affiliation(s)
- Richard Y. Wu
- Cell Biology Program, Research Institute, Division of Gastroenterology, Hepatology and Nutrition, Hospital for Sick Children, 555 University Avenue, Toronto, ON M5G 1X8 Canada
- Department of Laboratory Medicine and Pathobiology, Faculty of Medicine, University of Toronto, Toronto, Canada
| | - Pekka Määttänen
- Cell Biology Program, Research Institute, Division of Gastroenterology, Hepatology and Nutrition, Hospital for Sick Children, 555 University Avenue, Toronto, ON M5G 1X8 Canada
- Biology Department, Burman University, Lacombe, AB Canada
| | - Scott Napper
- Vaccine and Infectious Disease Organization-International Vaccine Center, University of Saskatchewan, Saskatoon, SK Canada
- Department of Biochemistry, University of Saskatchewan, Saskatoon, SK Canada
| | - Erin Scruten
- Vaccine and Infectious Disease Organization-International Vaccine Center, University of Saskatchewan, Saskatoon, SK Canada
| | - Bo Li
- Physiology and Experimental Medicine, Research Institute, Hospital for Sick Children, Toronto, ON Canada
| | - Yuhki Koike
- Physiology and Experimental Medicine, Research Institute, Hospital for Sick Children, Toronto, ON Canada
| | - Kathene C. Johnson-Henry
- Cell Biology Program, Research Institute, Division of Gastroenterology, Hepatology and Nutrition, Hospital for Sick Children, 555 University Avenue, Toronto, ON M5G 1X8 Canada
| | - Agostino Pierro
- Physiology and Experimental Medicine, Research Institute, Hospital for Sick Children, Toronto, ON Canada
- Division of General and Thoracic Surgery, Hospital for Sick Children, Toronto, ON Canada
| | - Laura Rossi
- Department of Medicine, Faculty of Health Sciences, McMaster University, Hamilton, ON Canada
- Department of Biochemistry and Biomedical Sciences, Faculty of Health Sciences, McMaster University, Hamilton, ON Canada
| | - Steven R. Botts
- Cell Biology Program, Research Institute, Division of Gastroenterology, Hepatology and Nutrition, Hospital for Sick Children, 555 University Avenue, Toronto, ON M5G 1X8 Canada
| | - Michael G. Surette
- Department of Medicine, Faculty of Health Sciences, McMaster University, Hamilton, ON Canada
- Department of Biochemistry and Biomedical Sciences, Faculty of Health Sciences, McMaster University, Hamilton, ON Canada
| | - Philip M. Sherman
- Cell Biology Program, Research Institute, Division of Gastroenterology, Hepatology and Nutrition, Hospital for Sick Children, 555 University Avenue, Toronto, ON M5G 1X8 Canada
- Department of Laboratory Medicine and Pathobiology, Faculty of Medicine, University of Toronto, Toronto, Canada
- Faculty of Dentistry, University of Toronto, Toronto, ON Canada
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17
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Vogt LM, Elderman ME, Borghuis T, de Haan BJ, Faas MM, de Vos P. Chain length-dependent effects of inulin-type fructan dietary fiber on human systemic immune responses against hepatitis-B. Mol Nutr Food Res 2017; 61. [PMID: 28586162 DOI: 10.1002/mnfr.201700171] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Revised: 05/18/2017] [Accepted: 05/29/2017] [Indexed: 02/06/2023]
Abstract
SCOPE In vivo studies demonstrating that only specific dietary-fibers contribute to immunity are still inconclusive, as measuring immune effects in healthy humans remains difficult. We applied a relatively inefficacious vaccination-challenge to study chain length-dependent effects of inulin-type fructan (ITF) dietary fibers on human immunity. METHODS AND RESULTS ITFs with two different 'degree of polymerization-' (DP)-profiles were tested in vitro for effects on PBMC-cytokines and TLR2 activation. In a double-blind placebo-controlled trial, 40 healthy volunteers (18-29 years) were divided into three groups and supplemented from day 1 to day 14 with DP10-60 ITF, DP2-25 ITF (both n = 13), or fructose placebo (n = 14), 8 g/day. On day 7, all volunteers were vaccinated against hepatitis B. Anti-HbsAg-titer development and lymphocyte subsets were studied. In vitro, DP10-60 ITFs stimulated a Th1-like cytokine profile and stimulated TLR2 more strongly than DP2-25 ITFs. In vivo, DP10-60 increased anti-HBsAg titers, Th1-cells, and transitional B-cells. Both ITFs increased CD45ROhi CTLs at day 35, and CD161+ cytokine producing NK-cells at day 21 and 35. CONCLUSION Support of immunity is determined by the chain length of ITFs. Only long-chain ITFs support immunity against pathogenic hepB-epitopes introduced by vaccination. Our findings demonstrate that specific dietary fibers need to be selected for immunity support.
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Affiliation(s)
- Leonie M Vogt
- Immunoendocrinology, Division of Medical Biology, Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Marlies E Elderman
- Immunoendocrinology, Division of Medical Biology, Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Theo Borghuis
- Immunoendocrinology, Division of Medical Biology, Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Bart J de Haan
- Immunoendocrinology, Division of Medical Biology, Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Marijke M Faas
- Immunoendocrinology, Division of Medical Biology, Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands.,Department of Obstetrics and Gynaecology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Paul de Vos
- Immunoendocrinology, Division of Medical Biology, Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
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18
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Iraporda C, Romanin DE, Bengoa AA, Errea AJ, Cayet D, Foligné B, Sirard JC, Garrote GL, Abraham AG, Rumbo M. Local Treatment with Lactate Prevents Intestinal Inflammation in the TNBS-Induced Colitis Model. Front Immunol 2016; 7:651. [PMID: 28082985 PMCID: PMC5187354 DOI: 10.3389/fimmu.2016.00651] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Accepted: 12/14/2016] [Indexed: 12/29/2022] Open
Abstract
Lactate has long been considered as a metabolic by-product of cells. Recently, this view has been changed by the observation that lactate can act as a signaling molecule and regulates critical functions of the immune system. We previously identified lactate as the component responsible for the modulation of innate immune epithelial response of fermented milk supernatants in vitro. We have also shown that lactate downregulates proinflammatory responses of macrophages and dendritic cells. So far, in vivo effects of lactate on intestinal inflammation have not been reported. We evaluated the effect of intrarectal administration of lactate in a murine model of colitis induced by 2,4,6-trinitrobenzenesulfonic acid (TNBS). The increase in lactate concentration in colon promoted protective effects against TNBS-induced colitis preventing histopathological damage, as well as bacterial translocation and rise of IL-6 levels in serum. Using intestinal epithelial reporter cells, we found that flagellin treatment induced reporter gene expression, which was abrogated by lactate treatment as well as by glycolysis inhibitors. Furthermore, lactate treatment modulated glucose uptake, indicating that high levels of extracellular lactate can impair metabolic reprograming induced by proinflammatory activation. These results suggest that lactate could be a potential beneficial microbiota metabolite and may constitute an overlooked effector with modulatory properties.
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Affiliation(s)
- Carolina Iraporda
- Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA, UNLP-CONICET-CIC.PBA) , La Plata , Argentina
| | - David E Romanin
- Instituto de Estudios Inmunológicos y Fisopatológicos (IIFP, UNLP-CONICET) , La Plata , Argentina
| | - Ana A Bengoa
- Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA, UNLP-CONICET-CIC.PBA) , La Plata , Argentina
| | - Agustina J Errea
- Instituto de Estudios Inmunológicos y Fisopatológicos (IIFP, UNLP-CONICET) , La Plata , Argentina
| | - Delphine Cayet
- CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Center for Infection and Immunity of Lille, University of Lille , Lille , France
| | - Benoit Foligné
- CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Center for Infection and Immunity of Lille, University of Lille , Lille , France
| | - Jean-Claude Sirard
- CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Center for Infection and Immunity of Lille, University of Lille , Lille , France
| | - Graciela L Garrote
- Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA, UNLP-CONICET-CIC.PBA) , La Plata , Argentina
| | - Analía G Abraham
- Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA, UNLP-CONICET-CIC.PBA), La Plata, Argentina; Área Bioquímica y Control de Alimentos, Facultad de Ciencias Exactas, UNLP, La Plata, Argentina
| | - Martín Rumbo
- Instituto de Estudios Inmunológicos y Fisopatológicos (IIFP, UNLP-CONICET) , La Plata , Argentina
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Jiminez JA, Uwiera TC, Abbott DW, Uwiera RRE, Inglis GD. Impacts of resistant starch and wheat bran consumption on enteric inflammation in relation to colonic bacterial community structures and short-chain fatty acid concentrations in mice. Gut Pathog 2016; 8:67. [PMID: 28031748 PMCID: PMC5178079 DOI: 10.1186/s13099-016-0149-6] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Accepted: 12/05/2016] [Indexed: 02/07/2023] Open
Abstract
Background
Identifying the connection among diet, the intestinal microbiome, and host health is currently an area of intensive research, but the potential of dietary fiber (DF) consumption to ameliorate intestinal inflammation has not been extensively studied. We examined the impacts of the DFs, wheat bran (WB) and resistant starch (RS) on host enteric health. A murine model of acute Th1/Th17 colitis (i.e. incited by Citrobacter rodentium) was used. Results Diets enriched with RS increased weight gain in mice inoculated with C. rodentium compared to mice consuming a conventional control (CN) diet. Short-chain fatty acid (SCFA) quantities in the cecum and distal colon were higher in mice consuming DFs, and these mice exhibited higher butyrate concentrations in the distal colon during inflammation. Histopathologic scores of inflammation in the proximal colon on day 14 post-inoculation (p.i.) (peak infection) and 21 p.i. (late infection) were lower in mice consuming DF-enriched diets compared to the CN diet. Consumption of WB reduced the expression of Th1/Th17 cytokines. As well, the expression of bacterial recognition and response genes such as Relmβ, RegIIIγ, and Tlr4 increased in mice consuming the RS-enriched diets. Furthermore, each diet generated a region-specific bacterial community, suggesting a link between selection for specific bacterial communities, SCFA concentrations, and inflammation in the murine colon. Conclusions Collectively, data indicated that the consumption of DF-rich diets ameliorates the effects of C. rodentium-induced enteritis by modifying the host microbiota to increase SCFA production, and bacterial recognition and response mechanisms to promote host health.
Electronic supplementary material The online version of this article (doi:10.1186/s13099-016-0149-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Janelle A Jiminez
- Agriculture and Agri-Food Canada, 5403-1st Avenue South, Lethbridge, AB T1J 4B1 Canada.,Department of Agricultural Food and Nutritional Science, University of Alberta, 410 Agriculture/Forestry Centre, Edmonton, AB T6G 2P5 Canada
| | - Trina C Uwiera
- Divisions of Pediatric Surgery, Department of Surgery, University of Alberta, 2C3.82 Walter C. Mackenzie Health Sciences Center, 8440-112th Street, Edmonton, AB T6G 2B7 Canada
| | - D Wade Abbott
- Agriculture and Agri-Food Canada, 5403-1st Avenue South, Lethbridge, AB T1J 4B1 Canada
| | - Richard R E Uwiera
- Department of Agricultural Food and Nutritional Science, University of Alberta, 410 Agriculture/Forestry Centre, Edmonton, AB T6G 2P5 Canada
| | - G Douglas Inglis
- Agriculture and Agri-Food Canada, 5403-1st Avenue South, Lethbridge, AB T1J 4B1 Canada
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20
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Liu L, Li H, Xu RH, Li PL. Expolysaccharides fromBifidobacterium animalisRH activates RAW 264.7 macrophages through toll-like receptor 4. FOOD AGR IMMUNOL 2016. [DOI: 10.1080/09540105.2016.1230599] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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Abstract
PURPOSE OF REVIEW A wide range of dietary carbohydrates, including prebiotic food ingredients, fermentable fibers, and milk oligosaccharides, are able to produce significant changes in the intestinal microbiota. These shifts in the microbial community are often characterized by increased levels of bifidobacteria and lactobacilli. More recent studies have revealed that species of Faecalibacterium, Akkermansia, and other less well studied members may also be enriched. We review the implications of these recent studies on future design of prebiotics and synbiotics to promote gastrointestinal health. RECENT FINDINGS Investigations assessing the clinical outcomes associated with dietary modification of the gut microbiota have shown systemic as well as specific health benefits. Both prebiotic oligosaccharides comprised of a linear arrangement of simple sugars, as well as fiber-rich foods containing complex carbohydrates, have been used in these trials. However, individual variability and nonresponding study participants can make the outcome of dietary interventions less predictable. In contrast, synergistic synbiotics containing prebiotics that specifically stimulate a cognate probiotic provide additional options for personalized gut therapies. SUMMARY This review describes recent research on how prebiotics and fermentable fibers can influence the gut microbiota and result in improvements to human health.
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