101
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Rhein protects against barrier disruption and inhibits inflammation in intestinal epithelial cells. Int Immunopharmacol 2019; 71:321-327. [PMID: 30952096 DOI: 10.1016/j.intimp.2019.03.030] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 03/14/2019] [Accepted: 03/17/2019] [Indexed: 12/27/2022]
Abstract
BACKGROUND AND AIMS Intestinal epithelial barrier and intestinal inflammation play indispensable roles in the development of intestinal diseases. The major aims of the current study were to investigate the potential of rhein, a major flavonoid compound isolated from Rheum rhabarbarum, in the treatment of intestinal diseases and its underlying mechanisms in vitro. METHODS The protective role of rhein on intestinal epithelial barrier was evaluated in a monolayer of IEC-6 cells stimulated by TNF-α, while the anti-inflammatory effects were investigated in an IEC-6 cell model with LPS stimulation. RESULTS Rhein inhibited the increase of phenol red flux and the decrease of TEER, as well as recovered the expression and distribution of ZO-1 and weakened MLC phosphorylation, MLCK expression and NF-κB activation. Meanwhile, LPS-stimulated IL-1β and IL-6 were down-regulated, expression levels of TLR4, NLRP3 and cleaved caspase1 were weakened and NF-κB was inactivated. CONCLUSIONS These results suggested that rhein has potential therapeutic effects against intestinal diseases by maintaining intestinal epithelial barrier and suppressing intestinal inflammation.
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102
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Contribution of Zinc and Zinc Transporters in the Pathogenesis of Inflammatory Bowel Diseases. J Immunol Res 2019; 2019:8396878. [PMID: 30984791 PMCID: PMC6431494 DOI: 10.1155/2019/8396878] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Accepted: 01/29/2019] [Indexed: 02/06/2023] Open
Abstract
Intestinal epithelial cells cover the surface of the intestinal tract. The cells are important for preserving the integrity of the mucosal barriers to protect the host from luminal antigens and pathogens. The mucosal barriers are maintained by the continuous and rapid self-renewal of intestinal epithelial cells. Defects in the self-renewal of these cells are associated with gastrointestinal diseases, including inflammatory bowel diseases and diarrhea. Zinc is an essential trace element for living organisms, and zinc deficiency is closely linked to the impaired mucosal integrity. Recent evidence has shown that zinc transporters contribute to the barrier function of intestinal epithelial cells. In this review, we describe the recent advances in understanding the role of zinc and zinc transporters in the barrier function and homeostasis of intestinal epithelial cells.
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103
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Chen X, Fu Y, Wang L, Qian W, Zheng F, Hou X. Bifidobacterium longum and VSL#3 ® amelioration of TNBS-induced colitis associated with reduced HMGB1 and epithelial barrier impairment. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2019; 92:77-86. [PMID: 30227219 DOI: 10.1016/j.dci.2018.09.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 09/11/2018] [Accepted: 09/11/2018] [Indexed: 06/08/2023]
Abstract
Probiotics are a beneficial treatment for inflammatory bowel disease (IBD). However, studies comparing the effects of similar doses of single and mixed probiotics on IBD are scarce. High mobility group box 1 (HMGB1) is an important proinflammatory mediator involved IBD development. The present study assessed fecal HMGB1 levels in IBD patients and compared the effects of similar doses of Bifidobacterium longum (Bif) versus VSL#3® on HMGB1 levels in 2,4,6-trinitrobenzene sulfonic acid (TNBS)-induced murine colitis. Twenty-four mice were divided into four treatment groups (n = 6 per group): ethanol (control), TNBS, TNBS + Bif, and TNBS + VSL#3®. Bif and VSL#3® (4 × 109 CFU/dose) were administered daily by intragastric gavage, beginning 3 d before TNBS treatment, for a total of 7 d. Fecal HMGB1 levels were higher in both active IBD patients and TNBS-induced colitis mice versus their respective controls. Both Bif and VSL#3® improved intestinal inflammation and fecal microbiota imbalance in TNBS-induced colitis mice. Both treatments also reduced serum and fecal HMGB1 levels as well as increased expression of zonula occludins-1, occludin, and claudin-1 in colon tissues. In Caco-2 cells, HMGB1 reduced transepithelial electrical resistance, zonula occludins-1 protein expression, and increased paracellular permeability of FITC-dextran; the opposite was found with both probiotic treatments. These findings suggest Bif and VSL#3® have similar beneficial effects on TNBS-induced colitis, possibly through inhibition of HMGB1 release and subsequent HMGB1-mediated gut barrier dysfunction. The present study provides novel insights into probiotic treatment of IBD.
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Affiliation(s)
- Xiaohong Chen
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yu Fu
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Lingli Wang
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Wei Qian
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Fang Zheng
- Department of Immunology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiaohua Hou
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
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104
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Peng M, Liu J, Liang Z. Probiotic Bacillus subtilis CW14 reduces disruption of the epithelial barrier and toxicity of ochratoxin A to Caco-2 cells. Food Chem Toxicol 2019; 126:25-33. [PMID: 30763683 DOI: 10.1016/j.fct.2019.02.009] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 01/21/2019] [Accepted: 02/04/2019] [Indexed: 12/13/2022]
Abstract
The multiple toxic effects of ochratoxin A (OTA) are a threat for human and animal. This study aimed to examine whether B. subtilis CW14 protected against OTA-induced barrier disruption and cell damage to Caco-2 cells. The results showed that Caco-2 cells treated with OTA led to microvilli disruption, tight junction protein (ZO-1 and claudin-1) damage, and inhibition of cell proliferation by arresting the cell cycle in the G2/M phase that promoted apoptosis. The treatment of B. subtilis CW14 mitigated the tight junction injury by improving ZO-1 protein expression, and it reduced apoptosis that was induced by OTA. Furthermore, transcriptome analysis indicated that OTA down-regulated genes that involved in the tight junction, cell cycle, and apoptosis-related signaling pathways. B. subtilis CW14 may have protected the ZO-1 protein by activating the toll-like receptor signaling pathway, and it reduced OTA damage by down-regulating the death receptor genes and up-regulating the DNA repair genes. These findings demonstrated the importance of B. subtilis CW14 in the regulation of tight junction proteins and in reducing death of intestinal epithelial cells. Thus, B. subtilis CW14 is a potential candidate as a food additive to protect against intestinal damage.
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Affiliation(s)
- Mengxue Peng
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Jiawei Liu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Zhihong Liang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China; The Supervision, Inspection and Testing Center of Genetically Modified Organisms, Ministry of Agriculture, Beijing, China; Beijing Laboratory for Food Quality and Safety, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China.
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105
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Kurose Y, Minami J, Sen A, Iwabuchi N, Abe F, Xiao J, Suzuki T. Bioactive factors secreted by Bifidobacterium breve B-3 enhance barrier function in human intestinal Caco-2 cells. Benef Microbes 2019; 10:89-100. [PMID: 30353739 DOI: 10.3920/bm2018.0062] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2023]
Abstract
Intestinal barrier function is closely related to intestinal health and diseases. Recent studies demonstrate that some probiotic and commensal bacteria secrete metabolites that are capable of affecting the intestinal functions. The present study examined an enhancing effect of bioactive factors secreted by Bifidobacterium breve strain B-3 on the intestinal tight junction (TJ) barrier integrity in human intestinal Caco-2 cells. Administration of conditioned medium obtained from B. breve strain B-3 (B3CM) to Caco-2 cells for 24 h increased trans-epithelial electrical resistance (TER), a TJ barrier indicator, across their monolayers. Immunoblot, immunofluorescence, and qPCR analyses demonstrated that B3CM increased an integral TJ protein, claudin-4 expression. In luciferase reporter assay, the administration of B3CM enhanced the claudin-4 promoter activity, indicating the transcriptional upregulation of claudin-4. Site-directed mutation of specificity protein 1 (Sp1) binding sites in the claudin-4 promoter sequence and suppression of Sp1 expression by siRNA technology clearly reduced the enhancing effect of B3CM on claudin-4 promoter activity. Liquid chromatography/mass spectrometry detected a significant amount of acetic acid in B3CM (28.3 mM). The administration of acetic acid to Caco-2 cells partially mimicked a B3CM-mediated increase in TER, but failed to increase claudin-4 expression. Taken together, bioactive factors secreted by B. breve B-3 enhanced the TJ barrier integrity in intestinal Caco-2 cells. Transcriptional regulation of claudin-4 through Sp1 is at least in part one of the underlying molecular mechanisms. In addition, acetic acid contributes to the B3CM-mediated barrier effect independently of claudin-4 expression.
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Affiliation(s)
- Y Kurose
- 1 Department of Biofunctional Science and Technology, Graduate School of Biosphere Science, Hiroshima University, 1-4-4 Kagamiyama, Higashi-Hiroshima 739-8528, Japan
| | - J Minami
- 2 Food Ingredients & Technology Institute, Morinaga Milk Industry Co. Ltd, Zama, Kanagawa 252-8583, Japan
| | - A Sen
- 2 Food Ingredients & Technology Institute, Morinaga Milk Industry Co. Ltd, Zama, Kanagawa 252-8583, Japan
| | - N Iwabuchi
- 2 Food Ingredients & Technology Institute, Morinaga Milk Industry Co. Ltd, Zama, Kanagawa 252-8583, Japan
| | - F Abe
- 2 Food Ingredients & Technology Institute, Morinaga Milk Industry Co. Ltd, Zama, Kanagawa 252-8583, Japan
| | - J Xiao
- 3 Next Generation Science Institute, Morinaga Milk Industry Co. Ltd, Zama, Kanagawa 252-8583, Japan
| | - T Suzuki
- 1 Department of Biofunctional Science and Technology, Graduate School of Biosphere Science, Hiroshima University, 1-4-4 Kagamiyama, Higashi-Hiroshima 739-8528, Japan
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106
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Wong J, Chopra J, Chiang LLW, Liu T, Ho J, Wu WKK, Tse G, Wong SH. The Role of Connexins in Gastrointestinal Diseases. J Mol Biol 2019; 431:643-652. [PMID: 30639409 DOI: 10.1016/j.jmb.2019.01.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 10/03/2018] [Accepted: 01/04/2019] [Indexed: 12/13/2022]
Abstract
Gap junctions are hexagonal arrays of protein molecules in the plasma membrane and were first described in Mauthner cell synapses of goldfish. They form pathways for coupling between cells, allowing passive, electrotonic spread of ions and also passage of larger molecules such as amino acids and nucleotides. They are expressed in both excitable and non-excitable tissues. Each gap junction is made of two connexons, which are hexameric proteins of the connexin subunit. In this review, the roles that connexins play in gastrointestinal motility, the mechanisms of altered connexin expression leading to inflammatory bowel disease, gastrointestinal infections, and gastrointestinal symptoms in autistic spectrum disorder are discussed in detail.
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Affiliation(s)
- Jeremy Wong
- Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong, PR China
| | - Jasmine Chopra
- Faculty of Arts and Science, University of Toronto, Toronto, Canada
| | | | - Tong Liu
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin 300211, PR China
| | - Jeffery Ho
- Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Hong Kong, PR China; Department of Medicine and Therapeutics, Chinese University of Hong Kong, Hong Kong, PR China
| | - William K K Wu
- Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Hong Kong, PR China; Department of Medicine and Therapeutics, Chinese University of Hong Kong, Hong Kong, PR China
| | - Gary Tse
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Hong Kong, PR China; Li Ka Shing Institute of Health Sciences, Faculty of Medicine, Chinese University of Hong Kong, Hong Kong, PR China.
| | - Sunny Hei Wong
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Hong Kong, PR China; Li Ka Shing Institute of Health Sciences, Faculty of Medicine, Chinese University of Hong Kong, Hong Kong, PR China.
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107
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P. McKernan D. Toll-like receptors and immune cell crosstalk in the intestinal epithelium. AIMS ALLERGY AND IMMUNOLOGY 2019. [DOI: 10.3934/allergy.2019.1.13] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
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108
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Shi J, Zhao XH. Effect of caseinate glycation with oligochitosan and transglutaminase on the intestinal barrier function of the tryptic caseinate digest in IEC-6 cells. Food Funct 2019; 10:652-664. [DOI: 10.1039/c8fo01785a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The oligochitosan-glycated caseinate digest has higher activity than the caseinate digest to strengthen the intestinal barrier function of IEC-6 cells.
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Affiliation(s)
- Jia Shi
- Key Laboratory of Dairy Science
- Ministry of Education
- Northeast Agricultural University
- Harbin 150030
- PR China
| | - Xin-Huai Zhao
- Key Laboratory of Dairy Science
- Ministry of Education
- Northeast Agricultural University
- Harbin 150030
- PR China
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109
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Ma HD, Zhao ZB, Ma WT, Liu QZ, Gao CY, Li L, Wang J, Tsuneyama K, Liu B, Zhang W, Zhou Y, Gershwin ME, Lian ZX. Gut microbiota translocation promotes autoimmune cholangitis. J Autoimmun 2018; 95:47-57. [PMID: 30340822 PMCID: PMC6290354 DOI: 10.1016/j.jaut.2018.09.010] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Revised: 09/17/2018] [Accepted: 09/23/2018] [Indexed: 02/07/2023]
Abstract
Gut microbiota and bacterial translocation have been implicated as significant contributors to mucosal immune responses and tolerance; alteration of microbial molecules, termed pathogen-associated molecular patterns (PAMP) and bacterial translocation are associated with immune pathology. However, the mechanisms by which dysregulated gut microbiota promotes autoimmunity is unclear. We have taken advantage of a well-characterized murine model of primary biliary cholangitis, dnTGFβRII mice, and an additional unique construct, toll-like receptor 2 (TLR2)-deficient dnTGFβRII mice coined dnTGFβRIITLR2-/- mice to investigate the influences of gut microbiota on autoimmune cholangitis. Firstly, we report that dnTGFβRII mice manifest altered composition of gut microbiota and that alteration of this gut microbiota by administration of antibiotics significantly alleviates T-cell-mediated infiltration and bile duct damage. Second, toll-like receptor 2 (TLR2)-deficient dnTGFβRII mice demonstrate significant exacerbation of autoimmune cholangitis when their epithelial barrier integrity was disrupted. Further, TLR2-deficiency mediates downregulated expression of tight junction-associated protein ZO-1 leading to increased gut permeability and bacterial translocation from gut to liver; use of antibiotics reduces microbiota translocation to liver and also decreases biliary pathology. In conclusion, our data demonstrates the important role of gut microbiota and bacterial translocation in the pathogenesis of murine autoimmune cholangitis.
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MESH Headings
- Ampicillin/pharmacology
- Animals
- Anti-Bacterial Agents/pharmacology
- Autoimmune Diseases/drug therapy
- Autoimmune Diseases/microbiology
- Autoimmune Diseases/pathology
- Bacterial Translocation/drug effects
- Bacterial Translocation/immunology
- Bile Ducts/drug effects
- Bile Ducts/immunology
- Bile Ducts/microbiology
- Bile Ducts/pathology
- Colon/drug effects
- Colon/immunology
- Colon/microbiology
- Colon/pathology
- Feces/microbiology
- Female
- Gastrointestinal Microbiome/drug effects
- Gastrointestinal Microbiome/immunology
- Gene Expression Regulation
- Immunity, Mucosal/drug effects
- Liver/drug effects
- Liver/immunology
- Liver/microbiology
- Liver/pathology
- Liver Cirrhosis, Biliary/drug therapy
- Liver Cirrhosis, Biliary/immunology
- Liver Cirrhosis, Biliary/microbiology
- Liver Cirrhosis, Biliary/pathology
- Metronidazole/pharmacology
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Neomycin/pharmacology
- Receptor, Transforming Growth Factor-beta Type II/deficiency
- Receptor, Transforming Growth Factor-beta Type II/genetics
- Receptor, Transforming Growth Factor-beta Type II/immunology
- Signal Transduction
- Toll-Like Receptor 2/deficiency
- Toll-Like Receptor 2/genetics
- Toll-Like Receptor 2/immunology
- Zonula Occludens-1 Protein/genetics
- Zonula Occludens-1 Protein/immunology
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Affiliation(s)
- Hong-Di Ma
- Department of Gastroenterology, Guangzhou Digestive Disease Center, Guangzhou First People's Hospital, School of Medicine, South China University of Technology, Guangzhou, Guangdong, 510180, China; Chronic Disease Laboratory, Institutes for Life Sciences and School of Medicine, South China University of Technology, Guangzhou, 510006, China; Liver Immunology Laboratory, The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences, University of Science and Technology of China, Hefei, Anhui, China
| | - Zhi-Bin Zhao
- Department of Gastroenterology, Guangzhou Digestive Disease Center, Guangzhou First People's Hospital, School of Medicine, South China University of Technology, Guangzhou, Guangdong, 510180, China; Chronic Disease Laboratory, Institutes for Life Sciences and School of Medicine, South China University of Technology, Guangzhou, 510006, China; Liver Immunology Laboratory, The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences, University of Science and Technology of China, Hefei, Anhui, China
| | - Wen-Tao Ma
- Liver Immunology Laboratory, The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences, University of Science and Technology of China, Hefei, Anhui, China
| | - Qing-Zhi Liu
- Department of Gastroenterology, Guangzhou Digestive Disease Center, Guangzhou First People's Hospital, School of Medicine, South China University of Technology, Guangzhou, Guangdong, 510180, China; Chronic Disease Laboratory, Institutes for Life Sciences and School of Medicine, South China University of Technology, Guangzhou, 510006, China; Liver Immunology Laboratory, The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences, University of Science and Technology of China, Hefei, Anhui, China
| | - Cai-Yue Gao
- Department of Gastroenterology, Guangzhou Digestive Disease Center, Guangzhou First People's Hospital, School of Medicine, South China University of Technology, Guangzhou, Guangdong, 510180, China; Chronic Disease Laboratory, Institutes for Life Sciences and School of Medicine, South China University of Technology, Guangzhou, 510006, China; Liver Immunology Laboratory, The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences, University of Science and Technology of China, Hefei, Anhui, China
| | - Liang Li
- Department of Gastroenterology, Guangzhou Digestive Disease Center, Guangzhou First People's Hospital, School of Medicine, South China University of Technology, Guangzhou, Guangdong, 510180, China; Chronic Disease Laboratory, Institutes for Life Sciences and School of Medicine, South China University of Technology, Guangzhou, 510006, China; Liver Immunology Laboratory, The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences, University of Science and Technology of China, Hefei, Anhui, China
| | - Jinjun Wang
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, 225127, Jiangsu Province, China
| | - Koichi Tsuneyama
- Department of Molecular and Environmental Pathology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Bin Liu
- Department of Rheumatology and Immunology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Weici Zhang
- Division of Rheumatology, Allergy and Clinical Immunology, University of California at Davis School of Medicine, Davis, CA, USA
| | - Yongjian Zhou
- Department of Gastroenterology, Guangzhou Digestive Disease Center, Guangzhou First People's Hospital, School of Medicine, South China University of Technology, Guangzhou, Guangdong, 510180, China.
| | - M Eric Gershwin
- Division of Rheumatology, Allergy and Clinical Immunology, University of California at Davis School of Medicine, Davis, CA, USA
| | - Zhe-Xiong Lian
- Department of Gastroenterology, Guangzhou Digestive Disease Center, Guangzhou First People's Hospital, School of Medicine, South China University of Technology, Guangzhou, Guangdong, 510180, China; Chronic Disease Laboratory, Institutes for Life Sciences and School of Medicine, South China University of Technology, Guangzhou, 510006, China; Liver Immunology Laboratory, The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences, University of Science and Technology of China, Hefei, Anhui, China.
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110
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Fusarium mycotoxins and in vitro species-specific approach with porcine intestinal and brain in vitro barriers: A review. Food Chem Toxicol 2018; 121:666-675. [DOI: 10.1016/j.fct.2018.09.050] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 09/19/2018] [Accepted: 09/21/2018] [Indexed: 01/03/2023]
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111
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Li Y, Lv L, Ye J, Fang D, Shi D, Wu W, Wang Q, Wu J, Yang L, Bian X, Jiang X, Jiang H, Yan R, Peng C, Li L. Bifidobacterium adolescentis CGMCC 15058 alleviates liver injury, enhances the intestinal barrier and modifies the gut microbiota in D-galactosamine-treated rats. Appl Microbiol Biotechnol 2018; 103:375-393. [PMID: 30345482 DOI: 10.1007/s00253-018-9454-y] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Revised: 09/17/2018] [Accepted: 09/20/2018] [Indexed: 02/07/2023]
Abstract
Acute liver failure is a drastic, unpredictable clinical syndrome with high mortality. Various preventive and adjuvant therapies based on modulating the gut flora have been proposed for hepatic injury. We aimed to explore the preventive and therapeutic effects of Bifidobacterium adolescentis CGMCC15058 on rat liver failure, as well as the potential microecological and immunological mechanisms of those effects. B. adolescentis CGMCC15058 (3 × 109 CFU), isolated from healthy human stool, was gavaged to Sprague-Dawley rats for 14 days. Acute liver injury was induced on the 15th day by intraperitoneal injection of D-galactosamine. After 24 h, liver and terminal ileum histology, liver function, plasma cytokines, bacterial translocation and gut microbiota composition were assessed. We found that pretreatment with B. adolescentis significantly relieved elevated serum levels of alanine aminotransferase (ALT), total bile acid and lipopolysaccharide-binding protein and enhanced the expression of mucin 4 and the tight junction protein zonula occludens-1. B. adolescentis exhibited anti-inflammatory properties as indicated by decreased levels of mTOR and the inflammatory cytokines TNF-α and IL-6, as well as elevated levels of the anti-inflammatory cytokine interleukins-10 in the liver. Similar anti-inflammatory signs were also found in plasma. B. adolescentis significantly altered the microbial community, depleting the common pathogenic taxon Proteus and markedly enriching the taxa Coriobacteriaceae, Bacteroidales and Allobaculum, which are involved in regulating the metabolism of lipids and aromatic amino acids. Our findings not only suggest B. adolescentis acts as a prospective probiotic against liver failure but also provide new insights into the prevention and treatment of liver disease.
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Affiliation(s)
- Yating Li
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University, Qingchun Road 79, Hangzhou, 31003, People's Republic of China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - Longxian Lv
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University, Qingchun Road 79, Hangzhou, 31003, People's Republic of China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - Jianzhong Ye
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University, Qingchun Road 79, Hangzhou, 31003, People's Republic of China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - Daiqiong Fang
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University, Qingchun Road 79, Hangzhou, 31003, People's Republic of China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - Ding Shi
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University, Qingchun Road 79, Hangzhou, 31003, People's Republic of China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - Wenrui Wu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University, Qingchun Road 79, Hangzhou, 31003, People's Republic of China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - Qing Wang
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University, Qingchun Road 79, Hangzhou, 31003, People's Republic of China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - Jingjing Wu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University, Qingchun Road 79, Hangzhou, 31003, People's Republic of China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - Liya Yang
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University, Qingchun Road 79, Hangzhou, 31003, People's Republic of China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - Xiaoyuan Bian
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University, Qingchun Road 79, Hangzhou, 31003, People's Republic of China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - Xianwan Jiang
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University, Qingchun Road 79, Hangzhou, 31003, People's Republic of China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - Huiyong Jiang
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University, Qingchun Road 79, Hangzhou, 31003, People's Republic of China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - Ren Yan
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University, Qingchun Road 79, Hangzhou, 31003, People's Republic of China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - Conggao Peng
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University, Qingchun Road 79, Hangzhou, 31003, People's Republic of China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - Lanjuan Li
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University, Qingchun Road 79, Hangzhou, 31003, People's Republic of China. .,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China.
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112
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Yi H, Wang L, Xiong Y, Wen X, Wang Z, Yang X, Gao K, Jiang Z. Effects of Lactobacillus reuteri LR1 on the growth performance, intestinal morphology, and intestinal barrier function in weaned pigs. J Anim Sci 2018; 96:2342-2351. [PMID: 29659876 DOI: 10.1093/jas/sky129] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Accepted: 04/10/2018] [Indexed: 01/22/2023] Open
Abstract
The objective of this study was to investigate the effects of Lactobacillus reuteri LR1, a new strain isolated from the feces of weaned pigs, on the growth performance, intestinal morphology, immune responses, and intestinal barrier function in weaned pigs. A total of 144 weaned pigs (Duroc × Landrace × Yorkshire, 21 d of age) with an initial BW of 6.49 ± 0.02 kg were randomly assigned to 3 dietary treatments with 8 replicate pens, each of per treatment and 6 pigs. Pigs were fed a basal diet (CON, controls), the basal diet supplemented with 100 mg/kg olaquindox and 75 mg/kg aureomycin (OA) or the basal diet supplemented with 5 × 1010 cfu/kg L. reuteri LR1 for a 14-d period. At the end of study, the ADG, ADFI, and G:F were calculated, and 1 randomly selected pig from each pen was euthanized for sample collection. The LR1 increased ADG (22.73%, P < 0.05) compared with CON. The villus height of the ileum was increased (P < 0.05) and crypt depth in duodenum was reduced (P < 0.05), along with increased (P < 0.05) villus height to crypt depth ratio of the jejunum and ileum by LR1 compared with CON and OA. LR1 increased (P < 0.05) ileal mucosal content of IL-22 and transforming growth factor-β compared with OA. Compared with CON, LR1 increased (P < 0.05) and OA decreased (P < 0.05) the ileal content of secretory immunoglobulin A (sIgA), and the abundance of transcripts of porcine β-defensin 2 and protegrin 1-5. Compared with CON, LR1 increased (P < 0.05) tight junction protein zonula occludens-1 and occludin transcripts in the mucosa of the jejunum and ileum, and those of mucin-2 in ileal mucosa. The relative expression of toll-like receptor 2 (TLR2) and TLR4 were increased (P < 0.05) in ileal mucosa in pigs fed LR1 compared with CON. In conclusion, these data indicated that dietary LR1 supplementation at 5 × 1010 cfu/kg improved growth performance, intestinal morphology, and intestinal barrier function in weaned pigs.
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Affiliation(s)
- Hongbo Yi
- State Key Laboratory of Livestock and Poultry Breeding, Ministry of Agriculture Key Laboratory of Animal Nutrition and Feed Science in South China, Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangdong Key Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Li Wang
- State Key Laboratory of Livestock and Poultry Breeding, Ministry of Agriculture Key Laboratory of Animal Nutrition and Feed Science in South China, Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangdong Key Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Yunxia Xiong
- State Key Laboratory of Livestock and Poultry Breeding, Ministry of Agriculture Key Laboratory of Animal Nutrition and Feed Science in South China, Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangdong Key Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Xiaolu Wen
- State Key Laboratory of Livestock and Poultry Breeding, Ministry of Agriculture Key Laboratory of Animal Nutrition and Feed Science in South China, Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangdong Key Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Zhilin Wang
- State Key Laboratory of Livestock and Poultry Breeding, Ministry of Agriculture Key Laboratory of Animal Nutrition and Feed Science in South China, Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangdong Key Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Xuefen Yang
- State Key Laboratory of Livestock and Poultry Breeding, Ministry of Agriculture Key Laboratory of Animal Nutrition and Feed Science in South China, Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangdong Key Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Kaiguo Gao
- State Key Laboratory of Livestock and Poultry Breeding, Ministry of Agriculture Key Laboratory of Animal Nutrition and Feed Science in South China, Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangdong Key Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Zongyong Jiang
- State Key Laboratory of Livestock and Poultry Breeding, Ministry of Agriculture Key Laboratory of Animal Nutrition and Feed Science in South China, Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangdong Key Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, China
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113
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Curli-Containing Enteric Biofilms Inside and Out: Matrix Composition, Immune Recognition, and Disease Implications. Microbiol Mol Biol Rev 2018; 82:82/4/e00028-18. [PMID: 30305312 DOI: 10.1128/mmbr.00028-18] [Citation(s) in RCA: 84] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Biofilms of enteric bacteria are highly complex, with multiple components that interact to fortify the biofilm matrix. Within biofilms of enteric bacteria such as Escherichia coli and Salmonella species, the main component of the biofilm is amyloid curli. Other constituents include cellulose, extracellular DNA, O antigen, and various surface proteins, including BapA. Only recently, the roles of these components in the formation of the enteric biofilm individually and in consortium have been evaluated. In addition to enhancing the stability and strength of the matrix, the components of the enteric biofilm influence bacterial virulence and transmission. Most notably, certain components of the matrix are recognized as pathogen-associated molecular patterns. Systemic recognition of enteric biofilms leads to the activation of several proinflammatory innate immune receptors, including the Toll-like receptor 2 (TLR2)/TLR1/CD14 heterocomplex, TLR9, and NLRP3. In the model of Salmonella enterica serovar Typhimurium, the immune response to curli is site specific. Although a proinflammatory response is generated upon systemic presentation of curli, oral administration of curli ameliorates the damaged intestinal epithelial barrier and reduces the severity of colitis. Furthermore, curli (and extracellular DNA) of enteric biofilms potentiate the autoimmune disease systemic lupus erythematosus (SLE) and promote the fibrillization of the pathogenic amyloid α-synuclein, which is implicated in Parkinson's disease. Homologues of curli-encoding genes are found in four additional bacterial phyla, suggesting that the biomedical implications involved with enteric biofilms are applicable to numerous bacterial species.
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114
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Villena J, Kitazawa H, Van Wees SCM, Pieterse CMJ, Takahashi H. Receptors and Signaling Pathways for Recognition of Bacteria in Livestock and Crops: Prospects for Beneficial Microbes in Healthy Growth Strategies. Front Immunol 2018; 9:2223. [PMID: 30319660 PMCID: PMC6170637 DOI: 10.3389/fimmu.2018.02223] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Accepted: 09/07/2018] [Indexed: 01/24/2023] Open
Abstract
Modern animal and crop production practices are associated with the regular use of antimicrobials, potentially increasing selection pressure on bacteria to become resistant. Alternative approaches are needed in order to satisfy the demands of the growing human population without the indiscriminate use of antimicrobials. Researchers have brought a different perspective to solve this problem and have emphasized the exploitation of animal- and plant-associated microorganisms that are beneficial to their hosts through the modulation of the innate immune system. There is increasing evidence that plants and animals employ microbial perception and defense pathways that closely resemble each other. Formation of pattern recognition receptor (PRR) complexes involving leucine-rich repeat (LRR)-containing proteins, mitogen-activated protein kinase (MAPK)-mediated activation of immune response genes, and subsequent production of antimicrobial products and reactive oxygen species (ROS) and nitric oxide (NO) to improve defenses against pathogens, add to the list of similarities between both systems. Recent pioneering work has identified that animal and plant cells use similar receptors for sensing beneficial commensal microbes that are important for the maintenance of the host's health. Here, we reviewed the current knowledge about the molecular mechanisms involved in the recognition of pathogenic and commensal microbes by the innate immune systems of animal and plants highlighting their differences and similarities. In addition, we discuss the idea of using beneficial microbes to modulate animal and plant immune systems in order to improve the resistance to infections and reduce the use of antimicrobial compounds.
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Affiliation(s)
- Julio Villena
- Laboratory of Immunobiotechnology, Reference Centre for Lactobacilli (CERELA-CONICET), Tucuman, Argentina.,Food and Feed Immunology Group, Laboratory of Animal Products Chemistry, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan
| | - Haruki Kitazawa
- Food and Feed Immunology Group, Laboratory of Animal Products Chemistry, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan.,Livestock Immunology Unit, International Education and Research Center for Food Agricultural Immunology, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan
| | - Saskia C M Van Wees
- Plant-Microbe Interactions, Department of Biology, Science4life, Utrecht University, Utrecht, Netherlands
| | - Corné M J Pieterse
- Plant-Microbe Interactions, Department of Biology, Science4life, Utrecht University, Utrecht, Netherlands
| | - Hideki Takahashi
- Laboratory of Plant Pathology, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan.,Plant Immunology Unit, International Education and Research Center for Food Agricultural Immunology, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan
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115
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Thomsen M, Clarke S, Vitetta L. The role of adjuvant probiotics to attenuate intestinal inflammatory responses due to cancer treatments. Benef Microbes 2018; 9:899-916. [PMID: 30232908 DOI: 10.3920/bm2017.0172] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Chemotherapy and radiotherapy treatment regimens for gastrointestinal, peritoneal and pelvic tumours can disrupt the intestinal microbiome and intestinal epithelia. Such disturbances can provoke symptoms such as diarrhoea, nausea and vomiting. Chemotherapy and radiotherapy induced gastrointestinal toxicity aggravating intestinal microbiome dysbiosis is postulated to adversely alter the intestinal microbiome, with a consequent induced pro-inflammatory effect that disrupts the intestinal microbiome-epithelia-mucosal immunity axis. Although not widely recognised, the intestinal mucosa is the largest and most densely and dynamically populated immune-environment. Cancer treatment adverse effects that affect intestinal and mucosal cells inadvertently target and disrupt resident intestinal macrophages, the cells that marshal immune activity in the intestinal mucosa by shaping pro-inflammatory and anti-inflammatory activities to control and eradicate infectious insults and maintain local homeostasis. Pathobionts (bacteria capable of pathogenic pro-inflammatory activity) and noxious environmental and bacterial antigens use the intestinal epithelia and gap junctions as a point of entry into the systemic circulation. This translocation movement promotes toxic sequelae that obstruct intestinal macrophage functions resulting in uncontrolled local and systemic pro-inflammatory activity, loss of phagocytic function and loss of expression of tight junction proteins. Probiotic bacteria as an adjunctive treatment shows efficacy in ameliorating enteropathies such as mucositis/diarrhoea resulting from chemotherapy or radiotherapy regimens. As such we posit that an important benefit that warrants a further focused research effort is the administration of adjuvant probiotics to help reduce the incidence of febrile neutropenia.
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Affiliation(s)
- M Thomsen
- 1 The University of Sydney, School of Medicine, Faculty of Medicine and Health, NSW 2006, Australia
| | - S Clarke
- 1 The University of Sydney, School of Medicine, Faculty of Medicine and Health, NSW 2006, Australia.,2 Northern Clinical School, Kolling Institute of Medical Research, Pacific Hwy, St Leonards NSW 2065, Australia
| | - L Vitetta
- 1 The University of Sydney, School of Medicine, Faculty of Medicine and Health, NSW 2006, Australia.,3 Medlab Clinical Ltd., 66 McCauley St., Sydney, 2006 NSW, Australia
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116
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Maria-Ferreira D, Nascimento AM, Cipriani TR, Santana-Filho AP, Watanabe PDS, Sant Ana DDMG, Luciano FB, Bocate KCP, van den Wijngaard RM, Werner MFDP, Baggio CH. Rhamnogalacturonan, a chemically-defined polysaccharide, improves intestinal barrier function in DSS-induced colitis in mice and human Caco-2 cells. Sci Rep 2018; 8:12261. [PMID: 30115942 PMCID: PMC6095889 DOI: 10.1038/s41598-018-30526-2] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Accepted: 07/27/2018] [Indexed: 12/27/2022] Open
Abstract
Natural polysaccharides have emerged as an important class of bioactive compounds due their beneficial biological effects. Here we investigated the protective and healing effects of rhamnogalacturonan (RGal) isolated from Acmella oleracea (L.) R.K. Jansen leaves in an experimental model of intestinal inflammation in mice and in heterogeneous human epithelial colorectal adenocarcinoma cells (Caco-2). The findings demonstrated that RGal treatment for 7 days reduced the severity of DSS-induced colitis by protecting mice from weight loss, macroscopic damage and reduction of colon length. When compared to the DSS group, RGal also protected the colon epithelium and promoted the maintenance of mucosal enterocytes and mucus secreting goblet cells, in addition to conserving collagen homeostasis and increasing cell proliferation. In an in vitro barrier function assay, RGal reduced the cellular permeability after exposure to IL-1β, while decreasing IL-8 secretion and claudin-1 expression and preserving the distribution of occludin. Furthermore, we also observed that RGal accelerated the wound healing in Caco-2 epithelial cell line. In conclusion, RGal ameliorates intestinal barrier function in vivo and in vitro and may represent an attractive and promising molecule for the therapeutic management of ulcerative colitis.
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Affiliation(s)
- Daniele Maria-Ferreira
- Department of Pharmacology, Universidade Federal do Paraná, Curitiba, Brazil
- Department of Biochemistry and Molecular Biology, Universidade Federal do Paraná, Curitiba, Brazil
| | | | - Thales Ricardo Cipriani
- Department of Biochemistry and Molecular Biology, Universidade Federal do Paraná, Curitiba, Brazil
| | | | - Paulo da Silva Watanabe
- Department of Biosciences and Physiopathology, Universidade Estadual de Maringá, Maringá, Brazil
| | | | - Fernando Bittencourt Luciano
- Department of Animal Science, School of Life Sciences, Pontifícia Universidade Católica do Paraná, Curitiba, Brazil
| | - Karla Carolina Paiva Bocate
- Department of Animal Science, School of Life Sciences, Pontifícia Universidade Católica do Paraná, Curitiba, Brazil
| | - René M van den Wijngaard
- Tytgat Institute for Liver and Intestinal Research, Department of Gastroenterology and Hepatology, Academic Medical Center, Amsterdam, The Netherlands
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117
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Abdelhamid L, Luo XM. Retinoic Acid, Leaky Gut, and Autoimmune Diseases. Nutrients 2018; 10:E1016. [PMID: 30081517 PMCID: PMC6115935 DOI: 10.3390/nu10081016] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 07/25/2018] [Accepted: 07/25/2018] [Indexed: 12/19/2022] Open
Abstract
A leaky gut has been observed in a number of autoimmune diseases including type 1 diabetes, multiple sclerosis, inflammatory bowel disease, and systemic lupus erythematosus. Previous studies from our laboratory have shown that lupus mice also bear a leaky gut and that the intestinal barrier function can be enhanced by gut colonization of probiotics such as Lactobacillus spp. Retinoic acid (RA) can increase the relative abundance of Lactobacillus spp. in the gut. Interestingly, RA has also been shown to strengthen the barrier function of epithelial cells in vitro and in the absence of probiotic bacteria. These reports bring up an interesting question of whether RA exerts protective effects on the intestinal barrier directly or through regulating the microbiota colonization. In this review, we will discuss the roles of RA in immunomodulation, recent literature on the involvement of a leaky gut in different autoimmune diseases, and how RA shapes the outcomes of these diseases.
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Affiliation(s)
- Leila Abdelhamid
- Department of Biomedical Sciences and Pathobiology, College of Veterinary Medicine, Virginia Tech, Blacksburg, VA 24061, USA.
| | - Xin M Luo
- Department of Biomedical Sciences and Pathobiology, College of Veterinary Medicine, Virginia Tech, Blacksburg, VA 24061, USA.
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118
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Perera N, Yang FL, Lu YT, Li LH, Hua KF, Wu SH. Antrodia cinnamomea Galactomannan Elicits Immuno-stimulatory Activity Through Toll-like Receptor 4. Int J Biol Sci 2018; 14:1378-1388. [PMID: 30123083 PMCID: PMC6097488 DOI: 10.7150/ijbs.24564] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2017] [Accepted: 06/29/2018] [Indexed: 01/19/2023] Open
Abstract
Antrodia cinnamomea (A. cinnamomea) is a medicinal fungus used in traditional Chinese medicine to treat different kinds of ailments, including liver diseases, abdominal pain, drug intoxication, diarrhea, itchy skin, hypertension, and cancer. Polysaccharides have been identified as one of the major pharmacologically active ingredients present in A. cinnamomea. The present study aims to investigate the immunoenhancing activity of galactomannan isolated from A. cinnamomea. The cold water-soluble polysaccharide (galactomannan-repeated; MW>70 kDa; named ACP) of A. cinnamomea was isolated, and immunostimulatory properties were studied through different immune cell models including mouse macrophages and human dendritic cells. Through Toll-like receptor 4, ACP stimulated tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6) in J774A.1 mouse macrophages, mouse peritoneal macrophages and human dendritic cells. It was further identified that ACP elicited its immunostimulatory activity through protein kinase C-α (PKC-α) and mitogen activated protein kinases (MAPK) phosphorylation. Furthermore, ACP exerted the endotoxin tolerance-like effect through NF-κB inhibition. These findings demonstrate the potential of A. cinnamomea galactomannan as an immunostimulator or an adjuvant in immunotherapy and vaccination.
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Affiliation(s)
- Namal Perera
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
- Chemical Biology and Molecular Biophysics Program, Taiwan International Graduate Program, Academia Sinica, Taipei, Taiwan
- Department of Chemistry, National Tsing-Hua University, Hsinchu, Taiwan
- Faculty of Applied Sciences, Sabaragamuwa University of Sri Lanka, Sri Lanka
| | - Feng-Ling Yang
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Yueh-Tung Lu
- Department of Biotechnology and Animal Science, National Ilan University, Ilan, Taiwan
| | - Lan-Hui Li
- Department of Laboratory Medicine, Linsen, Chinese Medicine and Kunming Branch, Taipei City Hospital, Taipei, Taiwan
| | - Kuo-Feng Hua
- Department of Biotechnology and Animal Science, National Ilan University, Ilan, Taiwan
- Department of Pathology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
- Department of Medical Research, China Medical University Hospital, Taichung, Taiwan
| | - Shih-Hsiung Wu
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
- Chemical Biology and Molecular Biophysics Program, Taiwan International Graduate Program, Academia Sinica, Taipei, Taiwan
- Department of Chemistry and Institute of Biochemical Sciences, National Taiwan University, Taiwan
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119
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Patra AK, Amasheh S, Aschenbach JR. Modulation of gastrointestinal barrier and nutrient transport function in farm animals by natural plant bioactive compounds – A comprehensive review. Crit Rev Food Sci Nutr 2018; 59:3237-3266. [DOI: 10.1080/10408398.2018.1486284] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Amlan Kumar Patra
- Institute of Veterinary Physiology, Freie Universität Berlin, Oertzenweg 19b, Berlin, Germany
- Institute of Animal Nutrition, West Bengal University of Animal and Fishery Sciences, 37 K. B. Sarani, Belgachia, Kolkata, India
| | - Salah Amasheh
- Institute of Veterinary Physiology, Freie Universität Berlin, Oertzenweg 19b, Berlin, Germany
| | - Jörg Rudolf Aschenbach
- Institute of Veterinary Physiology, Freie Universität Berlin, Oertzenweg 19b, Berlin, Germany
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120
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Luo L, Zhou Z, Xue J, Wang Y, Zhang J, Cai X, Liu Y, Yang F. Bletilla striata polysaccharide has a protective effect on intestinal epithelial barrier disruption in TAA-induced cirrhotic rats. Exp Ther Med 2018; 16:1715-1722. [PMID: 30186392 PMCID: PMC6122099 DOI: 10.3892/etm.2018.6430] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Accepted: 06/08/2018] [Indexed: 12/20/2022] Open
Abstract
It has been reported that intestinal epithelial barrier dysfunction serves an important role in the development of liver cirrhosis. However, at present there is no satisfactory treatment for intestinal mucosal lesions and ulcers associated with cirrhosis. The aim of the present study was to investigate the effect of Bletilla striata polysaccharide (BSP) on intestinal epithelial barrier disruption in rats with thioacetamide (TAA)-induced liver cirrhosis. Rats were randomly divided into 5 groups (n=10): BSP low dosage (15 mg/kg), BSP middle dosage (30 mg/kg), BSP high dosage (60 mg/kg), experiment and control groups. All groups except control group were administered with TAA (200 mg/kg/day) to induce liver cirrhosis. Following modeling, rats in the low, middle and high-dose BSP groups received BSP. ELISA kits were used to measure the endotoxin, alanine transaminase (ALT) and aspartate transaminase (AST) levels in the portal vein, while interleukin (IL)-6 and tumor necrosis factor (TNF)-α expression in the ileal tissue was measured. Reverse transcription-quantitative polymerase chain reaction (RT-qPCR) and western blotting were used to detect the expression of zonula occludens (ZO)-1 and occludin mRNA and protein, respectively. Intestinal epithelial tissue pathology was detected using hematoxylin-eosin (HE) staining. Immunohistochemistry was performed to assess the expression of ZO-1 and occludin in intestinal epithelial tissues. Following treatment with BSP, ALT, AST and endotoxin levels in the portal vein, as well as IL-6 and TNF-α expression in ileal tissues, were significantly decreased compared with model group (P<0.05 or 0.01). Furthermore, BSP treatment upregulated the expression of ZO-1 and occludin mRNA and protein compared with the model group (P<0.05 or 0.01) and cytoplasmic staining for these proteins was increased. The degree of intestinal epithelial tissue pathological damage was significantly reduced in the BSP groups. In conclusion, BSP is able to reduce endotoxin levels, inhibit the inflammatory cytokines IL-6 and TNF-α and elevate expression of ZO-1 and occludin at tight junctions. Together, these results suggest a novel protective agent for the restoration of intestinal epithelial barrier disruption.
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Affiliation(s)
- Lei Luo
- Department of Gastroenterology, The Second People's Hospital of Yichang, Yichang, Hubei 443000, P.R. China
| | - Zhang Zhou
- Department of Anesthesia, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, P.R. China
| | - Juan Xue
- Department of Gastroenterology, Hubei Provincial Hospital of Traditional Chinese and Western Medicine, Wuhan, Hubei 430015, P.R. China
| | - Yao Wang
- Department of Infectious Diseases, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Juan Zhang
- Department of Pulmonary Diseases, Jingmen City Hospital of Traditional Chinese Medicine, Jingmen, Hubei 448000, P.R. China
| | - Xin Cai
- School of Clinical Medical, Hubei University of Chinese Medicine, Wuhan, Hubei 430060, P.R. China
| | - Yuqing Liu
- School of Clinical Medical, Hubei University of Chinese Medicine, Wuhan, Hubei 430060, P.R. China
| | - Fan Yang
- Department of Hepatology, Hubei Provincial Hospital of Chinese Medicine, Wuhan, Hubei 430074, P.R. China
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121
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Kamdar K, Johnson AMF, Chac D, Myers K, Kulur V, Truevillian K, DePaolo RW. Innate Recognition of the Microbiota by TLR1 Promotes Epithelial Homeostasis and Prevents Chronic Inflammation. THE JOURNAL OF IMMUNOLOGY 2018; 201:230-242. [PMID: 29794015 DOI: 10.4049/jimmunol.1701216] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Accepted: 04/16/2018] [Indexed: 12/28/2022]
Abstract
There is cross-talk between the intestinal epithelium and the microbiota that functions to maintain a tightly regulated microenvironment and prevent chronic inflammation. This communication is partly mediated through the recognition of bacterial proteins by host-encoded innate receptors, such as TLRs. However, studies examining the role of TLR signaling on colonic homeostasis have given variable and conflicting results. Despite its critical role in mediating immunity during enteric infection of the small intestine, TLR1-mediated recognition of microbiota-derived ligands and their influence on colonic homeostasis has not been well studied. In this study, we demonstrate that defective TLR1 recognition of the microbiome by epithelial cells results in disruption of crypt homeostasis specifically within the secretory cell compartment, including a defect in the mucus layer, ectopic Paneth cells in the colon, and an increase in the number of rapidly dividing cells at the base of the crypt. As a consequence of the perturbed epithelial barrier, we found an increase in mucosal-associated and translocated commensal bacteria and chronic low-grade inflammation characterized by an increase in lineage-negative Sca1+Thy1hi innate lymphoid-like cells that exacerbate inflammation and worsen outcomes in a model of colonic injury and repair. Our findings demonstrate that sensing of the microbiota by TLR1 may provide key signals that regulate the colonic epithelium, thereby limiting inflammation through the prevention of bacterial attachment to the mucosa and exposure to the underlying immune system.
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Affiliation(s)
- Karishma Kamdar
- Department of Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033; and
| | - Andrew M F Johnson
- Division of Gastroenterology, Department of Medicine, University of Washington, Seattle, WA 98105
| | - Denise Chac
- Division of Gastroenterology, Department of Medicine, University of Washington, Seattle, WA 98105
| | - Kalisa Myers
- Department of Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033; and
| | - Vrishika Kulur
- Department of Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033; and
| | - Kyle Truevillian
- Division of Gastroenterology, Department of Medicine, University of Washington, Seattle, WA 98105
| | - R William DePaolo
- Department of Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033; and .,Division of Gastroenterology, Department of Medicine, University of Washington, Seattle, WA 98105
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122
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Mohseni Moghadam Z, Mahmoodzadeh Hosseini H, Amin M, Behzadi E, Imani Fooladi AA. Microbial metabolite effects on TLR to develop autoimmune diseases. TOXIN REV 2018. [DOI: 10.1080/15569543.2018.1469512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Affiliation(s)
- Zeinab Mohseni Moghadam
- Applied Microbiology Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Hamideh Mahmoodzadeh Hosseini
- Applied Microbiology Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Mohsen Amin
- Department of Drug and Food Control, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Elham Behzadi
- Department of Microbiology, College of Basic Sciences, Islamic Azad University, Shahr-e-Qods Branch, Tehran, Iran
| | - Abbas Ali Imani Fooladi
- Applied Microbiology Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
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123
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Caron-Beaudoin É, Viau R, Sanderson JT. Effects of Neonicotinoid Pesticides on Promoter-Specific Aromatase (CYP19) Expression in Hs578t Breast Cancer Cells and the Role of the VEGF Pathway. ENVIRONMENTAL HEALTH PERSPECTIVES 2018; 126:047014. [PMID: 29701941 PMCID: PMC6071809 DOI: 10.1289/ehp2698] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Revised: 03/23/2018] [Accepted: 03/26/2018] [Indexed: 05/06/2023]
Abstract
BACKGROUND Aromatase (CYP19) is a key enzyme in estrogens biosynthesis. In the mammary gland, CYP19 gene is expressed at low levels under the regulation of its I.4 promoter. In hormone-dependent breast cancer, fibroblast cells surrounding the tumor express increased levels of CYP19 mRNA due to a decrease of I.4 promoter activity and an increase of PII, I.3, and I.7 promoter activity. Little is known about the effects of environmental chemicals on the promoter-specific CYP19 expression. OBJECTIVE We aimed to determine the effects of two neonicotinoids (thiacloprid and imidacloprid) on promoter-specific CYP19 expression in Hs578t breast cancer cells and understand the signaling pathways involved. METHODS Hs578t cells were exposed to various signaling pathway stimulants or neonicotinoids for 24 h. Promoter-specific expression of CYP19 was determined by real-time quantitative polymerase chain reaction and catalytic activity of aromatase by tritiated water release assay. RESULTS To our knowledge, we are the first to demonstrate that the normal I.4 promoter and the breast cancer-relevant PII, I.3, and I.7 promoters of CYP19 are active in these cells. We found that the expression of CYP19 via promoters PII, I.3, and I.7 in Hs578t cells was, in part, dependent on the activation of two VEGF signaling pathways: mitogen-activated protein kinase (MAPK) 1/3 and phospholipase C (PLC). Exposure of Hs578t cells to environmental concentrations of imidacloprid and thiacloprid resulted in a switch in CYP19 promoter usage, involving inhibition of I.4 promoter activity and an increase of PII, I.3, and I.7 promoter-mediated CYP19 expression and aromatase catalytic activity. Greater effects were seen at lower concentrations. Our results suggest that thiacloprid and imidacloprid exert their effects at least partially by inducing the MAPK 1/3 and/or PLC pathways. CONCLUSIONS We demonstrated in vitro that neonicotinoids may stimulate a change in CYP19 promoter usage similar to that observed in patients with hormone-dependent breast cancer. https://doi.org/10.1289/EHP2698.
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Affiliation(s)
- Élyse Caron-Beaudoin
- INRS – Institut Armand-Frappier, Université du Québec, Laval, Quebec, Canada
- Department of Occupational and Environmental Health, School of Public Health, Université de Montréal, Montreal, Quebec, Canada
| | - Rachel Viau
- INRS – Institut Armand-Frappier, Université du Québec, Laval, Quebec, Canada
| | - J Thomas Sanderson
- INRS – Institut Armand-Frappier, Université du Québec, Laval, Quebec, Canada
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124
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Nath A, Haktanirlar G, Varga Á, Molnár MA, Albert K, Galambos I, Koris A, Vatai G. Biological Activities of Lactose-Derived Prebiotics and Symbiotic with Probiotics on Gastrointestinal System. ACTA ACUST UNITED AC 2018; 54:medicina54020018. [PMID: 30344249 PMCID: PMC6037253 DOI: 10.3390/medicina54020018] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2018] [Revised: 03/23/2018] [Accepted: 04/04/2018] [Indexed: 02/07/2023]
Abstract
Lactose-derived prebiotics provide wide ranges of gastrointestinal comforts. In this review article, the probable biochemical mechanisms through which lactose-derived prebiotics offer positive gastrointestinal health are reported along with the up-to-date results of clinical investigations; this might be the first review article of its kind, to the best of our knowledge. Lactose-derived prebiotics have unique biological and functional values, and they are confirmed as ‘safe’ by the Food and Drug Administration federal agency. Medical practitioners frequently recommend them as therapeutics as a pure form or combined with dairy-based products (yoghurt, milk and infant formulas) or fruit juices. The biological activities of lactose-derived prebiotics are expressed in the presence of gut microflora, mainly probiotics (Lactobacillus spp. in the small intestine and Bifidobacterium spp. in the large intestine). Clinical investigations reveal that galacto-oligosaccharide reduces the risks of several types of diarrhea (traveler’s diarrhea, osmotic diarrhea and Clostridium difficile associated relapsing diarrhea). Lactulose and lactosucrose prevent inflammatory bowel diseases (Crohn’s disease and ulcerative colitis). Lactulose and lactitol reduce the risk of hepatic encephalopathy. Furthermore, lactulose, galacto-oligosaccharide and lactitol prevent constipation in individuals of all ages. It is expected that the present review article will receive great attention from medical practitioners and food technologists.
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Affiliation(s)
- Arijit Nath
- Department of Food Engineering, Faculty of Food Science, Szent István University, Ménesi st 44, H-1118 Budapest, Hungary.
- Soós Ernő Water Technology Research Centre, Faculty of Engineering, University of Pannonia, Zrínyi M. u. 18, H-8800 Nagykanizsa, Hungary.
| | - Gokce Haktanirlar
- Department of Food Engineering, Faculty of Food Science, Szent István University, Ménesi st 44, H-1118 Budapest, Hungary.
| | - Áron Varga
- Department of Food Engineering, Faculty of Food Science, Szent István University, Ménesi st 44, H-1118 Budapest, Hungary.
| | - Máté András Molnár
- Department of Food Engineering, Faculty of Food Science, Szent István University, Ménesi st 44, H-1118 Budapest, Hungary.
| | - Krisztina Albert
- Department of Food Engineering, Faculty of Food Science, Szent István University, Ménesi st 44, H-1118 Budapest, Hungary.
| | - Ildikó Galambos
- Soós Ernő Water Technology Research Centre, Faculty of Engineering, University of Pannonia, Zrínyi M. u. 18, H-8800 Nagykanizsa, Hungary.
| | - András Koris
- Department of Food Engineering, Faculty of Food Science, Szent István University, Ménesi st 44, H-1118 Budapest, Hungary.
| | - Gyula Vatai
- Department of Food Engineering, Faculty of Food Science, Szent István University, Ménesi st 44, H-1118 Budapest, Hungary.
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125
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Paveljšek D, Juvan P, Košir R, Rozman D, Hacin B, Ivičak-Kocjan K, Rogelj I. Lactobacillus fermentum L930BB and Bifidobacterium animalis subsp. animalis IM386 initiate signalling pathways involved in intestinal epithelial barrier protection. Benef Microbes 2018; 9:515-525. [PMID: 29633647 DOI: 10.3920/bm2017.0107] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The manipulation of intestinal microbiota with beneficial microbes represents a promising alternative or adjunct therapy in gastrointestinal disorders and inflammation. The current study aims to clarify the signalling pathways and evaluate the possible beneficial effects of the combination of two strains. We used a dextran sulphate sodium (DSS)-induced mouse model of colitis. RNA extracted from the middle part of the colon tissue was used for examination of the global gene expression with Affymetrix microarrays. An enrichment analysis of the KEGG pathways was performed, and a subset of genes associated with intestinal epithelial barrier function was verified with qPCR. A clinical condition assessment of the differently treated mice revealed that the combination of these two bacterial strains was safe for use as a dietary supplement. All animals treated with DSS had affected colons and suffered weight loss. There were very small differences between the diseased groups, although the depth of inflammation was lower when cyclosporine A or the strain mixture was used. We discovered that the prophylactic administration of the Lactobacillus fermentum L930BB (L930BB) and Bifidobacterium animalis subsp. animalis IM386 (IM386) strains led to an anti-apoptotic pathway through phosphatidylinositol-4,5-bisphosphate 3-kinase (PI3K)/Akt and to the activation of pathways involved in the regulation of actin cytoskeleton via protein kinase C and GTPases. Reorganisation of actin cytoskeleton and decreased apoptosis are both helpful in intestinal epithelial cell reconstitution. We confirm important previous observations, showing that these pathways are downstream targets of Toll-like receptor 2 and fibroblast growth factor initiated signalling. Taken together, these results suggest that the combination of L930BB and IM386 could aid in the regeneration of the intestinal epithelium during pathogenesis via pattern recognition receptors and the stimulation of growth factor synthesis.
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Affiliation(s)
- D Paveljšek
- 1 Department of Animal Science, Biotechnical Faculty, University of Ljubljana, Groblje 3, 1230 Domžale, Slovenia
| | - P Juvan
- 2 Centre for Functional Genomics and Bio-Chips, Institute of Biochemistry, Faculty of Medicine, University of Ljubljana, Zaloška 4, 1000 Ljubljana, Slovenia
| | - R Košir
- 2 Centre for Functional Genomics and Bio-Chips, Institute of Biochemistry, Faculty of Medicine, University of Ljubljana, Zaloška 4, 1000 Ljubljana, Slovenia.,3 BIA Separations CRO, Labena d.o.o., Verovškova 64, 1000 Ljubljana, Slovenia
| | - D Rozman
- 2 Centre for Functional Genomics and Bio-Chips, Institute of Biochemistry, Faculty of Medicine, University of Ljubljana, Zaloška 4, 1000 Ljubljana, Slovenia
| | - B Hacin
- 4 National Veterinary Institute, Veterinary Faculty, University of Ljubljana, Pri Hrastu 18, 5000 Nova Gorica, Slovenia
| | - K Ivičak-Kocjan
- 5 Department of Synthetic Biology and Immunology, National Institute of Chemistry, Hajdrihova ulica 19, 1000 Ljubljana, Slovenia
| | - I Rogelj
- 1 Department of Animal Science, Biotechnical Faculty, University of Ljubljana, Groblje 3, 1230 Domžale, Slovenia
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126
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Garcia MA, Nelson WJ, Chavez N. Cell-Cell Junctions Organize Structural and Signaling Networks. Cold Spring Harb Perspect Biol 2018; 10:a029181. [PMID: 28600395 PMCID: PMC5773398 DOI: 10.1101/cshperspect.a029181] [Citation(s) in RCA: 273] [Impact Index Per Article: 45.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Cell-cell junctions link cells to each other in tissues, and regulate tissue homeostasis in critical cell processes that include tissue barrier function, cell proliferation, and migration. Defects in cell-cell junctions give rise to a wide range of tissue abnormalities that disrupt homeostasis and are common in genetic abnormalities and cancers. Here, we discuss the organization and function of cell-cell junctions primarily involved in adhesion (tight junction, adherens junction, and desmosomes) in two different epithelial tissues: a simple epithelium (intestine) and a stratified epithelium (epidermis). Studies in these tissues reveal similarities and differences in the organization and functions of different cell-cell junctions that meet the requirements for the specialized functions of each tissue. We discuss cell-cell junction responses to genetic and environmental perturbations that provide further insights into their roles in maintaining tissue homeostasis.
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Affiliation(s)
- Miguel A Garcia
- Department of Biology, Stanford University, Stanford, California 94305
| | - W James Nelson
- Department of Biology, Stanford University, Stanford, California 94305
- Departments of Molecular and Cellular Physiology, Stanford University, Stanford, California 94305
| | - Natalie Chavez
- Department of Biology, Stanford University, Stanford, California 94305
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127
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Gou ZY, Li L, Fan QL, Lin XJ, Jiang ZY, Zheng CT, Ding FY, Jiang SQ. Effects of oxidative stress induced by high dosage of dietary iron ingested on intestinal damage and caecal microbiota in Chinese Yellow broilers. J Anim Physiol Anim Nutr (Berl) 2018; 102:924-932. [PMID: 29572975 DOI: 10.1111/jpn.12885] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2017] [Accepted: 02/22/2018] [Indexed: 12/16/2022]
Abstract
The objective of this trial was to test the effects of oxidative stress induced by a high dosage of dietary iron on intestinal lesion and the microbiological compositions in caecum in Chinese Yellow broilers. A total of 450 1-day-old male chicks were randomly allotted into three groups. Supplemental iron (0, 700 and 1,400 mg/kg) was added to the basal diet resulting in three treatments containing 245, 908 and 1,651 mg/kg Fe (measured value) in diet respectively. Each treatment consisted of six replicate pens with 25 birds per pen. Jejunal enterocyte ultrastructure was observed by transmission electron microscopy. The results showed that a high dosage of dietary iron induced oxidative stress in broilers. Dilated endoplasmic reticulum (ER), autophagosome formation of jejunal enterocytes and decreased villi were caused by this oxidative stress. Compared to the control, concentration of the malondialdehyde (MDA) in jejunal mucosa in the 908 and 1,651 mg/kg Fe groups increased by 180% (p < .01) and 155% respectively (p < .01); activity of copper-zinc superoxide dismutase (Cu/ZnSOD) increased in jejunum (p < .01); and the concentration of plasma reduced glutathione (GSH) decreased by 34.9% (p < .01) in birds fed 1,651 mg/kg Fe. Gene expression of nuclear factor, erythroid-derived 2-like 2 (Nrf2) and zonula occludens-1 (ZO-1), in the higher dietary Fe groups was enhanced (p < .05). Species of microbial flora in caecum increased caused by oxidative stress. The PCR-DGGE (denaturing gradient gel electrophoresis) dendrograms revealed different microbiota (65% similarity coefficient) between the control and iron-supplemented groups (p < .05). These data suggest high dosage of iron supplement in feed diet can induce oxidative stress in Chinese Yellow broilers, and composition of microbiota in the caecum changed. It implied there should be no addition of excess iron when formulating diets in Chinese Yellow broilers.
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Affiliation(s)
- Z Y Gou
- State Key Laboratory of Livestock and Poultry Breeding, Key Laboratory of Animal Nutrition and Feed Science in South China, Ministry of Agriculture, Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangdong Key Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - L Li
- State Key Laboratory of Livestock and Poultry Breeding, Key Laboratory of Animal Nutrition and Feed Science in South China, Ministry of Agriculture, Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangdong Key Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Q L Fan
- State Key Laboratory of Livestock and Poultry Breeding, Key Laboratory of Animal Nutrition and Feed Science in South China, Ministry of Agriculture, Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangdong Key Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - X J Lin
- State Key Laboratory of Livestock and Poultry Breeding, Key Laboratory of Animal Nutrition and Feed Science in South China, Ministry of Agriculture, Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangdong Key Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Z Y Jiang
- State Key Laboratory of Livestock and Poultry Breeding, Key Laboratory of Animal Nutrition and Feed Science in South China, Ministry of Agriculture, Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangdong Key Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - C T Zheng
- State Key Laboratory of Livestock and Poultry Breeding, Key Laboratory of Animal Nutrition and Feed Science in South China, Ministry of Agriculture, Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangdong Key Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - F Y Ding
- State Key Laboratory of Livestock and Poultry Breeding, Key Laboratory of Animal Nutrition and Feed Science in South China, Ministry of Agriculture, Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangdong Key Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - S Q Jiang
- State Key Laboratory of Livestock and Poultry Breeding, Key Laboratory of Animal Nutrition and Feed Science in South China, Ministry of Agriculture, Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangdong Key Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, China
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128
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Agustí A, García-Pardo MP, López-Almela I, Campillo I, Maes M, Romaní-Pérez M, Sanz Y. Interplay Between the Gut-Brain Axis, Obesity and Cognitive Function. Front Neurosci 2018; 12:155. [PMID: 29615850 PMCID: PMC5864897 DOI: 10.3389/fnins.2018.00155] [Citation(s) in RCA: 170] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Accepted: 02/26/2018] [Indexed: 12/12/2022] Open
Abstract
Obesity continues to be one of the major public health problems due to its high prevalence and co-morbidities. Common co-morbidities not only include cardiometabolic disorders but also mood and cognitive disorders. Obese subjects often show deficits in memory, learning and executive functions compared to normal weight subjects. Epidemiological studies also indicate that obesity is associated with a higher risk of developing depression and anxiety, and vice versa. These associations between pathologies that presumably have different etiologies suggest shared pathological mechanisms. Gut microbiota is a mediating factor between the environmental pressures (e.g., diet, lifestyle) and host physiology, and its alteration could partly explain the cross-link between those pathologies. Westernized dietary patterns are known to be a major cause of the obesity epidemic, which also promotes a dysbiotic drift in the gut microbiota; this, in turn, seems to contribute to obesity-related complications. Experimental studies in animal models and, to a lesser extent, in humans suggest that the obesity-associated microbiota may contribute to the endocrine, neurochemical and inflammatory alterations underlying obesity and its comorbidities. These include dysregulation of the HPA-axis with overproduction of glucocorticoids, alterations in levels of neuroactive metabolites (e.g., neurotransmitters, short-chain fatty acids) and activation of a pro-inflammatory milieu that can cause neuro-inflammation. This review updates current knowledge about the role and mode of action of the gut microbiota in the cross-link between energy metabolism, mood and cognitive function.
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Affiliation(s)
- Ana Agustí
- Microbial Ecology and Nutrition Research Unit, Institute of Agrochemistry and Food Technology, National Research Council (IATA-CSIC), Valencia, Spain
| | - Maria P García-Pardo
- Microbial Ecology and Nutrition Research Unit, Institute of Agrochemistry and Food Technology, National Research Council (IATA-CSIC), Valencia, Spain
| | - Inmaculada López-Almela
- Microbial Ecology and Nutrition Research Unit, Institute of Agrochemistry and Food Technology, National Research Council (IATA-CSIC), Valencia, Spain
| | - Isabel Campillo
- Microbial Ecology and Nutrition Research Unit, Institute of Agrochemistry and Food Technology, National Research Council (IATA-CSIC), Valencia, Spain
| | - Michael Maes
- IMPACT Strategic Research Centre, School of Medicine, Deakin University, Geelong, VIC, Australia
| | - Marina Romaní-Pérez
- Microbial Ecology and Nutrition Research Unit, Institute of Agrochemistry and Food Technology, National Research Council (IATA-CSIC), Valencia, Spain
| | - Yolanda Sanz
- Microbial Ecology and Nutrition Research Unit, Institute of Agrochemistry and Food Technology, National Research Council (IATA-CSIC), Valencia, Spain
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129
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Abstract
Type 1 diabetes (T1D) is an autoimmune disorder characterized by the selective destruction of insulin-producing β cells as result of a complex interplay between genetic, stochastic and environmental factors in genetically susceptible individuals. An increasing amount of experimental data from animal models and humans has supported the role played by imbalanced gut microbiome in T1D pathogenesis. The commensal intestinal microbiota is fundamental for several physiologic mechanisms, including the establishment of immune homeostasis. Alterations in its composition have been correlated to changes in the gut immune system, including defective tolerance to food antigens, intestinal inflammation and enhanced gut permeability. Early findings reported differences in the intestinal microbiome of subjects affected by prediabetes or overt disease compared to healthy individuals. The present review focuses on microbiota-host homeostasis, its alterations, factors that influence microbiome composition and discusses their putative correlation with T1D development. Further studies are necessary to clarify the role played by microbiota modifications in the processes that cause enhanced permeability and the autoimmune mechanisms responsible for T1D onset.
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130
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Pardo-Camacho C, González-Castro AM, Rodiño-Janeiro BK, Pigrau M, Vicario M. Epithelial immunity: priming defensive responses in the intestinal mucosa. Am J Physiol Gastrointest Liver Physiol 2018; 314:G247-G255. [PMID: 29146676 DOI: 10.1152/ajpgi.00215.2016] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
As the largest interface between the outside and internal milieu, the intestinal epithelium constitutes the first structural component facing potential luminal threats to homeostasis. This single-cell layer is the epicenter of a tightly regulated communication network between external and internal factors that converge to prime defensive responses aimed at limiting antigen penetration and the maintenance of intestinal barrier function. The defensive role developed by intestinal epithelial cells (IEC) relies largely on the variety of receptors they express at both extracellular (apical and basolateral) and intracellular compartments, and the capacity of IEC to communicate with immune and nervous systems. IEC recognize pathogen-associated molecules by innate receptors that promote the production of mucus, antimicrobial substances, and immune mediators. Epithelial cells are key to oral tolerance maintenance and also participate in adaptive immunity through the expression of immunoglobulin (Ig) receptors and by promoting local Ig class switch recombination. In IEC, different types of antigens can be sensed by multiple immune receptors that share signaling pathways to assure effective responses. Regulated defensive activity maintains intestinal homeostasis, whereas a breakdown in the control of epithelial immunity can increase the intestinal passage of luminal content and microbial invasion, leading to inflammation and tissue damage. In this review, we provide an updated overview of the type of immune receptors present in the human intestinal epithelium and the responses generated to promote effective barrier function and maintain mucosal homeostasis.
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Affiliation(s)
- Cristina Pardo-Camacho
- Laboratory of Translational Mucosal Immunology, Digestive Diseases Research Unit, Vall d'Hebron Institut de Recerca , Barcelona , Spain.,Department of Gastroenterology, Hospital Universitari Vall d'Hebron , Barcelona , Spain.,Facultat de Medicina, Universitat Autònoma de Barcelona , Barcelona , Spain
| | - Ana M González-Castro
- Laboratory of Translational Mucosal Immunology, Digestive Diseases Research Unit, Vall d'Hebron Institut de Recerca , Barcelona , Spain.,Department of Gastroenterology, Hospital Universitari Vall d'Hebron , Barcelona , Spain.,Facultat de Medicina, Universitat Autònoma de Barcelona , Barcelona , Spain
| | - Bruno K Rodiño-Janeiro
- Laboratory of Neuro-Immuno-Gastroenterology Group, Digestive Diseases Research Unit, Vall d'Hebron Institut de Recerca , Barcelona , Spain.,Department of Gastroenterology, Hospital Universitari Vall d'Hebron , Barcelona , Spain.,Facultat de Medicina, Universitat Autònoma de Barcelona , Barcelona , Spain
| | - Marc Pigrau
- Laboratory of Neuro-Immuno-Gastroenterology Group, Digestive Diseases Research Unit, Vall d'Hebron Institut de Recerca , Barcelona , Spain.,Department of Gastroenterology, Hospital Universitari Vall d'Hebron , Barcelona , Spain.,Facultat de Medicina, Universitat Autònoma de Barcelona , Barcelona , Spain
| | - María Vicario
- Laboratory of Translational Mucosal Immunology, Digestive Diseases Research Unit, Vall d'Hebron Institut de Recerca , Barcelona , Spain.,Department of Gastroenterology, Hospital Universitari Vall d'Hebron , Barcelona , Spain.,Facultat de Medicina, Universitat Autònoma de Barcelona , Barcelona , Spain.,Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas , Madrid , Spain
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131
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Coleman OI, Haller D. Bacterial Signaling at the Intestinal Epithelial Interface in Inflammation and Cancer. Front Immunol 2018; 8:1927. [PMID: 29354132 PMCID: PMC5760496 DOI: 10.3389/fimmu.2017.01927] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Accepted: 12/15/2017] [Indexed: 12/11/2022] Open
Abstract
The gastrointestinal (GI) tract provides a compartmentalized interface with an enormous repertoire of immune and metabolic activities, where the multicellular structure of the mucosa has acquired mechanisms to sense luminal factors, such as nutrients, microbes, and a variety of host-derived and microbial metabolites. The GI tract is colonized by a complex ecosystem of microorganisms, which have developed a highly coevolved relationship with the host’s cellular and immune system. Intestinal epithelial pattern recognition receptors (PRRs) substantially contribute to tissue homeostasis and immune surveillance. The role of bacteria-derived signals in intestinal epithelial homeostasis and repair has been addressed in mouse models deficient in PRRs and signaling adaptors. While critical for host physiology and the fortification of barrier function, the intestinal microbiota poses a considerable health challenge. Accumulating evidence indicates that dysbiosis is associated with the pathogenesis of numerous GI tract diseases, including inflammatory bowel diseases (IBD) and colorectal cancer (CRC). Aberrant signal integration at the epithelial cell level contributes to such diseases. An increased understanding of bacterial-specific structure recognition and signaling mechanisms at the intestinal epithelial interface is of great importance in the translation to future treatment strategies. In this review, we summarize the growing understanding of the regulation and function of the intestinal epithelial barrier, and discuss microbial signaling in the dynamic host–microbe mutualism in both health and disease.
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Affiliation(s)
| | - Dirk Haller
- Technical University of Munich, Munich, Germany.,ZIEL-Institute for Food & Health, Technical University of Munich, Munich, Germany
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132
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Yang G, Bibi S, Du M, Suzuki T, Zhu MJ. Regulation of the intestinal tight junction by natural polyphenols: A mechanistic perspective. Crit Rev Food Sci Nutr 2018; 57:3830-3839. [PMID: 27008212 DOI: 10.1080/10408398.2016.1152230] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Impairment of the epithelial barrier function is closely linked to the pathogenesis of various gastrointestinal diseases, food allergies, type I diabetes, and other systematic diseases. Plant-derived polyphenols are natural secondary metabolites and exert various physiological benefits, including anti-inflammatory, anti-oxidative, anti-carcinogenic, and anti-aging effects. Recent studies also show the role of plant polyphenols in regulation of the intestinal barrier and prevention of intestinal inflammatory diseases. Here we summarize the regulatory pathways and mediators linking polyphenols to their beneficial effects on tight junction and gut epithelial barrier functions, and provide useful information about using polyphenols as nutraceuticals for intestinal diseases.
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Affiliation(s)
- Guan Yang
- a School of Food Science , Washington State University , Pullman , Washington , USA
| | - Shima Bibi
- a School of Food Science , Washington State University , Pullman , Washington , USA
| | - Min Du
- b Department of Animal Science , Washington State University , Pullman , Washington , USA
| | - Takuya Suzuki
- c Department of Biofunctional Science and Technology , Hiroshima University , Higashi-Hiroshima , Japan
| | - Mei-Jun Zhu
- a School of Food Science , Washington State University , Pullman , Washington , USA
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133
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Shi J, Fu Y, Zhao XH. Effects of Maillard-type caseinate glycation on the preventive action of caseinate digests in acrylamide-induced intestinal barrier dysfunction in IEC-6 cells. RSC Adv 2018; 8:38036-38046. [PMID: 35558620 PMCID: PMC9089819 DOI: 10.1039/c8ra08103d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Accepted: 11/06/2018] [Indexed: 01/13/2023] Open
Abstract
Dietary acrylamide has attracted widespread concern due to its toxic effects; however, its adverse impact on the intestines is less assessed. Protein glycation of the Maillard-type is widely used for property modification, but its potential effect on preventive efficacy of protein digest against the acrylamide-induced intestinal barrier dysfunction is quite unknown. Caseinate was thus glycated with lactose. Two tryptic digests from the glycated caseinate and untreated caseinate (namely GCN digest and CN digest) were then assessed for their protective effects against acrylamide-induced intestinal barrier dysfunction in the IEC-6 cell model. The results showed that acrylamide at 1.25–10 mmol L−1 dose-dependently had cytotoxic effects on IEC-6 cells, leading to decreased cell viability and increased lactate dehydrogenase release. Acrylamide also brought about barrier dysfunction, including decreased trans-epithelial electrical resistance (TEER) value and increased epithelial permeability. However, the two digests at 12.5–100 μg mL−1 could alleviate this dysfunction via enhancing cell viability by 70.2–83.9%, partly restoring TEER values, and decreasing epithelial permeability from 100% to 76.6–94.1%. The two digests at 25 μg mL−1 strengthened the tight junctions via increasing tight junction proteins ZO-1, occludin, and claudin-1 expression by 11.5–68.6%. However, the results also suggested that the GCN digest always showed lower protective efficacy than the CN digest in the cells. It is concluded that Maillard-type caseinate glycation with lactose endows the resultant tryptic digest with impaired preventive effect against acrylamide-induced intestinal barrier dysfunction, highlighting another adverse effect of the Maillard reaction on food proteins. Glycated caseinate digest of the Maillard-type has lower protective action than caseinate digest against acrylamide-induced barrier dysfunction in IEC-6 cells.![]()
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Affiliation(s)
- Jia Shi
- Key Laboratory of Dairy Science
- Ministry of Education
- Northeast Agricultural University
- Harbin 150030
- PR China
| | - Yu Fu
- Department of Food Science
- Faculty of Science
- University of Copenhagen
- Frederiksberg 1958
- Denmark
| | - Xin-Huai Zhao
- Key Laboratory of Dairy Science
- Ministry of Education
- Northeast Agricultural University
- Harbin 150030
- PR China
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Hughes KR, Harnisch LC, Alcon-Giner C, Mitra S, Wright CJ, Ketskemety J, van Sinderen D, Watson AJM, Hall LJ. Bifidobacterium breve reduces apoptotic epithelial cell shedding in an exopolysaccharide and MyD88-dependent manner. Open Biol 2017; 7:rsob.160155. [PMID: 28123052 PMCID: PMC5303268 DOI: 10.1098/rsob.160155] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Accepted: 12/15/2016] [Indexed: 12/14/2022] Open
Abstract
Certain members of the microbiota genus Bifidobacterium are known to positively influence host well-being. Importantly, reduced bifidobacterial levels are associated with inflammatory bowel disease (IBD) patients, who also have impaired epithelial barrier function, including elevated rates of apoptotic extrusion of small intestinal epithelial cells (IECs) from villi—a process termed ‘cell shedding’. Using a mouse model of pathological cell shedding, we show that mice receiving Bifidobacterium breve UCC2003 exhibit significantly reduced rates of small IEC shedding. Bifidobacterial-induced protection appears to be mediated by a specific bifidobacterial surface exopolysaccharide and interactions with host MyD88 resulting in downregulation of intrinsic and extrinsic apoptotic responses to protect epithelial cells under highly inflammatory conditions. Our results reveal an important and previously undescribed role for B. breve, in positively modulating epithelial cell shedding outcomes via bacterial- and host-dependent factors, supporting the notion that manipulation of the microbiota affects intestinal disease outcomes.
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Affiliation(s)
- K R Hughes
- The Gut Health and Food Safety Programme, Institute of Food Research, Norwich Research Park, Colney, Norwich NR4 7UA, UK .,Norwich Medical School, University of East Anglia, Norwich Research Park, Norwich NR4 7UQ, UK
| | - L C Harnisch
- The Gut Health and Food Safety Programme, Institute of Food Research, Norwich Research Park, Colney, Norwich NR4 7UA, UK.,Norwich Medical School, University of East Anglia, Norwich Research Park, Norwich NR4 7UQ, UK
| | - C Alcon-Giner
- The Gut Health and Food Safety Programme, Institute of Food Research, Norwich Research Park, Colney, Norwich NR4 7UA, UK
| | - S Mitra
- The Gut Health and Food Safety Programme, Institute of Food Research, Norwich Research Park, Colney, Norwich NR4 7UA, UK
| | - C J Wright
- The Gut Health and Food Safety Programme, Institute of Food Research, Norwich Research Park, Colney, Norwich NR4 7UA, UK.,Norwich Medical School, University of East Anglia, Norwich Research Park, Norwich NR4 7UQ, UK
| | - J Ketskemety
- The Gut Health and Food Safety Programme, Institute of Food Research, Norwich Research Park, Colney, Norwich NR4 7UA, UK
| | - D van Sinderen
- APC Microbiome Institute, University College Cork, Cork, Ireland.,School of Microbiology, University College Cork, Cork, Ireland
| | - A J M Watson
- The Gut Health and Food Safety Programme, Institute of Food Research, Norwich Research Park, Colney, Norwich NR4 7UA, UK .,Norwich Medical School, University of East Anglia, Norwich Research Park, Norwich NR4 7UQ, UK
| | - L J Hall
- The Gut Health and Food Safety Programme, Institute of Food Research, Norwich Research Park, Colney, Norwich NR4 7UA, UK
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135
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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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136
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Abstract
Microbiota play a key role in various body functions, as well as in physiological, metabolic, and immunological processes, through different mechanisms such as the regulation of the development and/or functions of different types of immune cells in the intestines. Evidence indicates that alteration in the gut microbiota can influence infectious and non-infectious diseases. Bacteria that reside on the mucosal surface or within the mucus layer interact with the host immune system, thus, a healthy gut microbiota is essential for the development of mucosal immunity. In patients with human immunodeficiency virus (HIV), including those who control their disease with antiretroviral drugs (ART), the gut microbiome is very different than the microbiome of those not infected with HIV. Recent data suggests that, for these patients, dysbiosis may lead to a breakdown in the gut’s immunologic activity, causing systemic bacteria diffusion and inflammation. Since in HIV-infected patients in this state, including those in ART therapy, the treatment of gastrointestinal tract disorders is frustrating, many studies are in progress to investigate the ability of probiotics to modulate epithelial barrier functions, microbiota composition, and microbial translocation. This mini-review analyzed the use of probiotics to prevent and attenuate several gastrointestinal manifestations and to improve gut-associated lymphoid tissue (GALT) immunity in HIV infection.
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137
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Vela Ramirez JE, Sharpe LA, Peppas NA. Current state and challenges in developing oral vaccines. Adv Drug Deliv Rev 2017; 114:116-131. [PMID: 28438674 PMCID: PMC6132247 DOI: 10.1016/j.addr.2017.04.008] [Citation(s) in RCA: 231] [Impact Index Per Article: 33.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 04/10/2017] [Accepted: 04/19/2017] [Indexed: 02/06/2023]
Abstract
While vaccination remains the most cost effective strategy for disease prevention, communicable diseases persist as the second leading cause of death worldwide. There is a need to design safe, novel vaccine delivery methods to protect against unaddressed and emerging diseases. Development of vaccines administered orally is preferable to traditional injection-based formulations for numerous reasons including improved safety and compliance, and easier manufacturing and administration. Additionally, the oral route enables stimulation of humoral and cellular immune responses at both systemic and mucosal sites to establish broader and long-lasting protection. However, oral delivery is challenging, requiring formulations to overcome the harsh gastrointestinal (GI) environment and avoid tolerance induction to achieve effective protection. Here we address the rationale for oral vaccines, including key biological and physicochemical considerations for next-generation oral vaccine design.
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Affiliation(s)
- Julia E Vela Ramirez
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX, USA; Institute for Biomaterials, Drug Delivery, and Regenerative Medicine, The University of Texas at Austin, Austin, TX, USA
| | - Lindsey A Sharpe
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX, USA; Institute for Biomaterials, Drug Delivery, and Regenerative Medicine, The University of Texas at Austin, Austin, TX, USA
| | - Nicholas A Peppas
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX, USA; Institute for Biomaterials, Drug Delivery, and Regenerative Medicine, The University of Texas at Austin, Austin, TX, USA; McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX, USA; Department of Surgery and Perioperative Care, Dell Medical School, The University of Texas at Austin, Austin, TX, USA; Division of Pharmaceutics, College of Pharmacy, The University of Texas at Austin, Austin, TX, USA.
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138
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ElObeid AS, Kamal-Eldin A, Abdelhalim MAK, Haseeb AM. Pharmacological Properties of Melanin and its Function in Health. Basic Clin Pharmacol Toxicol 2017; 120:515-522. [PMID: 28027430 DOI: 10.1111/bcpt.12748] [Citation(s) in RCA: 76] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Accepted: 12/14/2016] [Indexed: 01/08/2023]
Abstract
The biological pigment melanin is present in most of the biological systems. It manifests a host of biological and pharmacological properties. Its role as a molecule with special properties and functions affecting general health, including photoprotective and immunological action, are well recognized. Its antioxidant, anti-inflammatory, immunomodulatory, radioprotective, hepatic, gastrointestinal and hypoglycaemic benefits have only recently been recognized and studied. It is also associated with certain disorders of the nervous system. In this MiniReview, we consider the steadily increasing literature on the bioavailability and functional activity of melanin. Published literature shows that melanin may play a number of possible pharmacological effects such as protective, stimulatory, diagnostic and curative roles in human health. In this MiniReview, possible health roles and pharmacological effects are considered.
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Affiliation(s)
- Adila Salih ElObeid
- King Abdullah International Medical Research Centre, National Guard & Health Affairs, Riyadh, Saudi Arabia
| | - Afaf Kamal-Eldin
- Department of Food Science, United Arab Emirates University, AlAin, United Arab Emirates
| | | | - Adil M Haseeb
- Physics and Astronomy Department, King Saud University, Riyadh, Saudi Arabia
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139
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Quinteiro-Filho WM, Calefi AS, Cruz DSG, Aloia TPA, Zager A, Astolfi-Ferreira CS, Piantino Ferreira JA, Sharif S, Palermo-Neto J. Heat stress decreases expression of the cytokines, avian β-defensins 4 and 6 and Toll-like receptor 2 in broiler chickens infected with Salmonella Enteritidis. Vet Immunol Immunopathol 2017; 186:19-28. [PMID: 28413046 DOI: 10.1016/j.vetimm.2017.02.006] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Revised: 01/31/2017] [Accepted: 02/25/2017] [Indexed: 01/05/2023]
Abstract
A high ambient temperature is a highly relevant stressor in poultry production. Heat stress (HS) has been reported to reduce animal welfare, performance indices and increase Salmonella susceptibility. Salmonella spp. are major zoonotic pathogen that cause over 1 billion of human infections worldwide annually. Therefore, the current study was designed to analyze the effect of heat stress on Salmonella infection in chickens through modulation of the immune responses. Salmonella Enteritidis was inoculated via gavage at one day of age (106cfu/mL). Heat stress 31±1°C was applied from 35 to 41 days of age. Broiler chickens were divided into the following groups of 12 chickens: control (C); heat stress (HS31°C); S. Enteritidis positive control (PC); and S. Enteritidis+heat stress (PHS31°C). We observed that heat stress increased corticosterone serum levels. Concomitantly heat stress decreased (1) the IgA and IFN-γ plasmatic levels; (2) the mRNA expression of IL-6, IL-12 in spleen and IL-1β, IL-10, TGF-β in cecal tonsils; (3) the mRNA expression of AvBD4 and AvBD6 in cecal tonsils; and (4) the mRNA expression of TLR2 in spleen and cecal tonsils of chickens infected with S. Enteritidis (PHS31°C group). Heat stress also increased Salmonella colonization in the crop and caecum as well as Salmonella invasion to the spleen, liver and bone marrow, showing a deficiency in the control of S. Enteritidis induced infection. Together, the present data suggested that heat stress activated hypothalamus-pituitary-adrenal (HPA) axis, as observed by the increase in the corticosterone levels, which in turn presumably decreases the immune system activity, leading to an impairment of the intestinal mucosal barrier and increasing chicken susceptibility to the invasion of different organs by S. Enteritidis .
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Affiliation(s)
- W M Quinteiro-Filho
- Neuroimmunomodulation Research Group, Department of Pathology, School of Veterinary Medicine, University of São Paulo, São Paulo, SP, Brazil.
| | - A S Calefi
- Neuroimmunomodulation Research Group, Department of Pathology, School of Veterinary Medicine, University of São Paulo, São Paulo, SP, Brazil
| | - D S G Cruz
- Neuroimmunomodulation Research Group, Department of Pathology, School of Veterinary Medicine, University of São Paulo, São Paulo, SP, Brazil
| | - T P A Aloia
- Experimental Research Laboratory, Albert Einstein Jewish Institute for Education and Research, Albert Einstein Hospital, Sao Paulo, Brazil
| | - A Zager
- Neuroimmunomodulation Research Group, Department of Pathology, School of Veterinary Medicine, University of São Paulo, São Paulo, SP, Brazil
| | - C S Astolfi-Ferreira
- Laboratory of Avian Diseases, School of Veterinary Medicine, University of São Paulo, São Paulo, SP, Brazil
| | - J A Piantino Ferreira
- Laboratory of Avian Diseases, School of Veterinary Medicine, University of São Paulo, São Paulo, SP, Brazil
| | - S Sharif
- Laboratory of Immunology, Department of Pathobiology, University of Guelph, Guelph, ON, Canada
| | - J Palermo-Neto
- Neuroimmunomodulation Research Group, Department of Pathology, School of Veterinary Medicine, University of São Paulo, São Paulo, SP, Brazil
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140
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Protein kinase C δ signaling is required for dietary prebiotic-induced strengthening of intestinal epithelial barrier function. Sci Rep 2017; 7:40820. [PMID: 28098206 PMCID: PMC5241689 DOI: 10.1038/srep40820] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Accepted: 12/12/2016] [Indexed: 01/05/2023] Open
Abstract
Prebiotics are non-digestible oligosaccharides that promote the growth of beneficial gut microbes, but it is unclear whether they also have direct effects on the intestinal mucosal barrier. Here we demonstrate two commercial prebiotics, inulin and short-chain fructo-oligosaccharide (scFOS), when applied onto intestinal epithelia in the absence of microbes, directly promote barrier integrity to prevent pathogen-induced barrier disruptions. We further show that these effects involve the induction of select tight junction (TJ) proteins through a protein kinase C (PKC) δ-dependent mechanism. These results suggest that in the absence of microbiota, prebiotics can directly exert barrier protective effects by activating host cell signaling in the intestinal epithelium, which represents a novel alternative mechanism of action of prebiotics.
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141
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Kurashima Y, Kiyono H. Mucosal Ecological Network of Epithelium and Immune Cells for Gut Homeostasis and Tissue Healing. Annu Rev Immunol 2017; 35:119-147. [PMID: 28125357 DOI: 10.1146/annurev-immunol-051116-052424] [Citation(s) in RCA: 184] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The intestinal epithelial barrier includes columnar epithelial, Paneth, goblet, enteroendocrine, and tuft cells as well as other cell populations, all of which contribute properties essential for gastrointestinal homeostasis. The intestinal mucosa is covered by mucin, which contains antimicrobial peptides and secretory IgA and prevents luminal bacteria, fungi, and viruses from stimulating intestinal immune responses. Conversely, the transport of luminal microorganisms-mediated by M, dendritic, and goblet cells-into intestinal tissues facilitates the harmonization of active and quiescent mucosal immune responses. The bacterial population within gut-associated lymphoid tissues creates the intratissue cohabitations for harmonized mucosal immunity. Intermolecular and intercellular communication among epithelial, immune, and mesenchymal cells creates an environment conducive for epithelial regeneration and mucosal healing. This review summarizes the so-called intestinal mucosal ecological network-the complex but vital molecular and cellular interactions of epithelial mesenchymal cells, immune cells, and commensal microbiota that achieve intestinal homeostasis, regeneration, and healing.
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Affiliation(s)
- Yosuke Kurashima
- Division of Mucosal Immunology, Department of Microbiology and Immunology, The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan; .,International Research and Development Center for Mucosal Vaccines, The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan.,Institute for Global Prominent Research, Chiba University, Chiba 260-8670, Japan.,Department of Mucosal Immunology, Graduate School of Medicine, Chiba University, Chiba 260-8670, Japan.,Department of Innovative Medicine, Graduate School of Medicine, Chiba University, Chiba 260-8670, Japan.,Chiba University-UC San Diego Center for Mucosal Immunology, Allergy, and Vaccine, La Jolla, CA 92093
| | - Hiroshi Kiyono
- Division of Mucosal Immunology, Department of Microbiology and Immunology, The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan; .,International Research and Development Center for Mucosal Vaccines, The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan.,Chiba University-UC San Diego Center for Mucosal Immunology, Allergy, and Vaccine, La Jolla, CA 92093.,Department of Immunology, Graduate School of Medicine, Chiba University, Chiba 260-8670, Japan
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142
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Hashemi A, Villa CR, Comelli EM. Probiotics in early life: a preventative and treatment approach. Food Funct 2017; 7:1752-68. [PMID: 26979945 DOI: 10.1039/c5fo01148e] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Microbial colonization of the infant gut plays a key role in immunological and metabolic pathways impacting human health. Since the maturation of the gut microbiota coincides with early life development, failure to develop a health compatible microbiota composition may result in pathology and disease in later life. Probiotics are live microorganisms that, when administered in adequate amounts, confer a health benefit on the host. Maternal transfer of microorganisms is possible during pregnancy and lactation, and the mother's diet and microbiota can influence that of her offspring. Furthermore, pre-term birth, Caesarean section birth, formula feeding, antibiotic use, and malnutrition have been linked to dysbiosis, which in turn is associated with several pathologies such as necrotizing enterocolitis, inflammatory bowel diseases, antibiotic associated diarrhea, colic, and allergies. Thus, early life should represent a preferred stage of life for probiotic interventions. In this context, they could be regarded as a means to 'program' the individual for health maintenance, in order to prevent pathologies associated with dysbiosis. In order to elucidate the mechanisms underlying the benefits of probiotic administration, pre-clinical studies have been conducted and found an array of positive results such as improved microbial composition, intestinal maturation, decreased pathogenic load and infections, and improved immune response. Moreover, specific probiotic strains administered during the perinatal period have shown promise in attenuating severity of necrotizing enterocolitis. The mechanisms elucidated suggest that probiotic interventions in early life can be envisaged for disease prevention in both healthy offspring and offspring at risk of chronic disease.
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Affiliation(s)
- Ashkan Hashemi
- Department of Nutritional Sciences, Faculty of Medicine, University of Toronto, Toronto, ON, Canada.
| | - Christopher R Villa
- Department of Nutritional Sciences, Faculty of Medicine, University of Toronto, Toronto, ON, Canada.
| | - Elena M Comelli
- Department of Nutritional Sciences, Faculty of Medicine, University of Toronto, Toronto, ON, Canada. and Centre for Child Nutrition and Health, Faculty of Medicine, University of Toronto, Toronto, ON, Canada
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143
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Yoshikawa K, Kurihara C, Furuhashi H, Takajo T, Maruta K, Yasutake Y, Sato H, Narimatsu K, Okada Y, Higashiyama M, Watanabe C, Komoto S, Tomita K, Nagao S, Miura S, Tajiri H, Hokari R. Psychological stress exacerbates NSAID-induced small bowel injury by inducing changes in intestinal microbiota and permeability via glucocorticoid receptor signaling. J Gastroenterol 2017; 52:61-71. [PMID: 27075753 DOI: 10.1007/s00535-016-1205-1] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2016] [Accepted: 03/23/2016] [Indexed: 02/04/2023]
Abstract
BACKGROUND Nonsteroidal anti-inflammatory drugs (NSAIDs) are popular painkillers, but they have serious side effects, not only in the upper gastrointestinal tract but also in the small intestine. It is well known that psychological stress may exacerbate various gastrointestinal diseases. The aim of this study was to determine whether psychological stress exacerbates NSAID enteropathy and to determine the possible underlying mechanisms for this. METHODS Experiment 1: mice were exposed to water avoidance stress (WAS) or sham stress for 1 h per day for 8 consecutive days, and then enteropathy was induced by indomethacin. Experiment 2: cecal contents from stress (-) or (+) mice were transplanted into mice that had received antibiotics and in which NSAID enteropathy had been induced without WAS. Experiment 3: mifepristone, a glucocorticoid receptor antagonist, was injected before WAS for 8 days. Small intestinal injury, mRNA expression of TNFα, intestinal permeability, and the microbial community were assessed. RESULTS Psychological stress exacerbated NSAID enteropathy and increased intestinal permeability. Psychological stress induced changes in the ileal microbiota that were characterized by increases in the total number of bacteria and the proportion of Gram-negative bacteria. The increased susceptibility to NSAIDs and intestinal permeability due to WAS was transferable via cecal microbiota transplantation. The increased permeability and aggravation of NSAID enteropathy caused by WAS were blocked by the administration of mifepristone. CONCLUSIONS This study demonstrated a relationship between NSAID enteropathy and psychological stress, and showed the utility of studying the intestinal microbiota in order to elucidate the pathophysiology of NSAID enteropathy. It also showed the impact of stress on the intestinal microbiota and the mucosal barrier in gastrointestinal diseases.
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Affiliation(s)
- Kenichi Yoshikawa
- Division of Gastroenterology, Department of Internal Medicine, National Defense Medical College, 3-2 Namiki, Tokorozawa-shi, Saitama, 359-8513, Japan.
- Division of Gastroenterology and Hepatology, Internal Medicine, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-ku, Tokyo, 105-8461, Japan.
| | - Chie Kurihara
- Division of Gastroenterology, Department of Internal Medicine, National Defense Medical College, 3-2 Namiki, Tokorozawa-shi, Saitama, 359-8513, Japan
| | - Hirotaka Furuhashi
- Division of Gastroenterology, Department of Internal Medicine, National Defense Medical College, 3-2 Namiki, Tokorozawa-shi, Saitama, 359-8513, Japan
| | - Takeshi Takajo
- Division of Gastroenterology, Department of Internal Medicine, National Defense Medical College, 3-2 Namiki, Tokorozawa-shi, Saitama, 359-8513, Japan
| | - Koji Maruta
- Division of Gastroenterology, Department of Internal Medicine, National Defense Medical College, 3-2 Namiki, Tokorozawa-shi, Saitama, 359-8513, Japan
| | - Yuichi Yasutake
- Division of Gastroenterology, Department of Internal Medicine, National Defense Medical College, 3-2 Namiki, Tokorozawa-shi, Saitama, 359-8513, Japan
| | - Hirokazu Sato
- Division of Gastroenterology, Department of Internal Medicine, National Defense Medical College, 3-2 Namiki, Tokorozawa-shi, Saitama, 359-8513, Japan
| | - Kazuyuki Narimatsu
- Division of Gastroenterology, Department of Internal Medicine, National Defense Medical College, 3-2 Namiki, Tokorozawa-shi, Saitama, 359-8513, Japan
| | - Yoshikiyo Okada
- Division of Gastroenterology, Department of Internal Medicine, National Defense Medical College, 3-2 Namiki, Tokorozawa-shi, Saitama, 359-8513, Japan
| | - Masaaki Higashiyama
- Division of Gastroenterology, Department of Internal Medicine, National Defense Medical College, 3-2 Namiki, Tokorozawa-shi, Saitama, 359-8513, Japan
| | - Chikako Watanabe
- Division of Gastroenterology, Department of Internal Medicine, National Defense Medical College, 3-2 Namiki, Tokorozawa-shi, Saitama, 359-8513, Japan
| | - Shunsuke Komoto
- Department of Endoscopic and Photodynamic Medicine, National Defense Medical College, Saitama, Japan
| | - Kengo Tomita
- Division of Gastroenterology, Department of Internal Medicine, National Defense Medical College, 3-2 Namiki, Tokorozawa-shi, Saitama, 359-8513, Japan
| | - Shigeaki Nagao
- Department of Endoscopic and Photodynamic Medicine, National Defense Medical College, Saitama, Japan
| | | | - Hisao Tajiri
- Division of Gastroenterology and Hepatology, Internal Medicine, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Ryota Hokari
- Division of Gastroenterology, Department of Internal Medicine, National Defense Medical College, 3-2 Namiki, Tokorozawa-shi, Saitama, 359-8513, Japan
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144
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Latorre E, Layunta E, Grasa L, Castro M, Pardo J, Gomollón F, Alcalde AI, Mesonero JE. Intestinal Serotonin Transporter Inhibition by Toll-Like Receptor 2 Activation. A Feedback Modulation. PLoS One 2016; 11:e0169303. [PMID: 28033388 PMCID: PMC5199115 DOI: 10.1371/journal.pone.0169303] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2016] [Accepted: 12/14/2016] [Indexed: 01/09/2023] Open
Abstract
TLR2 is a microbiota recognition receptor that has been described to contribute to intestinal homeostasis and to ameliorate inflammatory intestinal injury. In this context, serotonin (5-HT) has shown to be an essential intestinal physiological neuromodulator that is also involved in intestinal inflammatory diseases. Since the interaction between TLR2 activation and the intestinal serotoninergic system remains non-investigated, our main aim was to analyze the effect of TLR2 on intestinal serotonin transporter (SERT) activity and expression and the intracellular pathways involved. Caco-2/TC7 cells were used to analyze SERT and TLR2 molecular expression and SERT activity by measuring 5-HT uptake. The results showed that apical TLR2 activation inhibits SERT activity in Caco-2/TC7 cells mainly by reducing SERT protein level either in the plasma membrane, after short-term TLR2 activation or in both the plasma membrane and cell lysate, after long-term activation. cAMP/PKA pathway appears to mediate short-term inhibitory effect of TLR2 on SERT; however, p38 MAPK pathway has been shown to be involved in both short- and long-term TLR2 effect. Reciprocally, 5-HT long-term treatment yielded TLR2 down regulation in Caco-2/TC7 cells. Finally, results from in vivo showed an augmented intestinal SERT expression in mice Tlr2-/-, thus confirming our inhibitory effect of TLR2 on intestinal SERT in vitro. The present work infers that TLR2 may act in intestinal pathophysiology, not only by its inherent innate immune role, but also by regulating the intestinal serotoninergic system.
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Affiliation(s)
- Eva Latorre
- Departamento Farmacología y Fisiología, Facultad de Veterinaria, Instituto de Investigación Sanitaria de Aragón (IIS), Universidad de Zaragoza, Zaragoza. Spain
- RNA—Mediated Mechanisms of Disease, Institute of Biomedical and Clinical Sciences, University of Exeter Medical School. Exeter. United Kingdom
- * E-mail:
| | - Elena Layunta
- Departamento Farmacología y Fisiología, Facultad de Veterinaria, Instituto de Investigación Sanitaria de Aragón (IIS), Universidad de Zaragoza, Zaragoza. Spain
- Instituto Agroalimentario de Aragón–IA2- (Universidad de Zaragoza–CITA), Zaragoza, Spain
| | - Laura Grasa
- Departamento Farmacología y Fisiología, Facultad de Veterinaria, Instituto de Investigación Sanitaria de Aragón (IIS), Universidad de Zaragoza, Zaragoza. Spain
- Instituto Agroalimentario de Aragón–IA2- (Universidad de Zaragoza–CITA), Zaragoza, Spain
| | - Marta Castro
- Departamento Farmacología y Fisiología, Facultad de Veterinaria, Instituto de Investigación Sanitaria de Aragón (IIS), Universidad de Zaragoza, Zaragoza. Spain
- Instituto Agroalimentario de Aragón–IA2- (Universidad de Zaragoza–CITA), Zaragoza, Spain
| | - Julián Pardo
- Departamento Bioquímica y Biología Molecular y Celular, Facultad de Ciencias, Instituto de Investigación Sanitaria de Aragón (IIS), Universidad de Zaragoza, Zaragoza, Spain
| | - Fernando Gomollón
- Servicio de Sistema Digestivo. Hospital Clínico Universitario "Lozano Blesa", Instituto de Investigación Sanitaria de Aragón (IIS); Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Zaragoza, Spain
| | - Ana I. Alcalde
- Departamento Farmacología y Fisiología, Facultad de Veterinaria, Instituto de Investigación Sanitaria de Aragón (IIS), Universidad de Zaragoza, Zaragoza. Spain
- Instituto Agroalimentario de Aragón–IA2- (Universidad de Zaragoza–CITA), Zaragoza, Spain
| | - José E. Mesonero
- Departamento Farmacología y Fisiología, Facultad de Veterinaria, Instituto de Investigación Sanitaria de Aragón (IIS), Universidad de Zaragoza, Zaragoza. Spain
- Instituto Agroalimentario de Aragón–IA2- (Universidad de Zaragoza–CITA), Zaragoza, Spain
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145
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Metformin Improves Ileal Epithelial Barrier Function in Interleukin-10 Deficient Mice. PLoS One 2016; 11:e0168670. [PMID: 28002460 PMCID: PMC5176295 DOI: 10.1371/journal.pone.0168670] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2016] [Accepted: 12/05/2016] [Indexed: 12/15/2022] Open
Abstract
Background and aims The impairment of intestinal epithelial barrier is the main etiologic factor of inflammatory bowel disease. The proper intestinal epithelial proliferation and differentiation is crucial for maintaining intestinal integrity. Metformin is a common anti-diabetic drug. The objective is to evaluate the protective effects of metformin on ileal epithelial barrier integrity using interleukin-10 deficient (IL10KO) mice. Methods Wild-type and IL10KO mice were fed with/without metformin for 6 weeks and then ileum was collected for analyses. The mediatory role of AMP-activated protein kinase (AMPK) was further examined by gain and loss of function study in vitro. Results Compared to wild-type mice, IL10KO mice had increased proliferation, reduced goblet cell and Paneth cell lineage differentiation in the ileum tissue, which was accompanied with increased crypt expansion. Metformin supplementation mitigated intestinal cell proliferation, restored villus/crypt ratio, increased goblet cell and Paneth cell differentiation and improved barrier function. In addition, metformin supplementation in IL10KO mice suppressed macrophage pro-inflammatory activity as indicated by reduced M1 macrophage abundance and decreased pro-inflammatory cytokine IL-1β, TNF-α and IFN-γ expressions. As a target of metformin, AMPK phosphorylation was enhanced in mice treated with metformin, regardless of mouse genotypes. In correlation, the mRNA level of differentiation regulator including bmp4, bmpr2 and math1 were also increased in IL10KO mice supplemented with metformin, which likely explains the enhanced epithelial differentiation in IL10KO mice with metformin. Consistently, in Caco-2 cells, metformin promoted claudin-3 and E-cadherin assembly and mitigated TNF-α-induced fragmentation of tight junction proteins. Gain and loss of function assay also demonstrated AMPK was correlated with epithelial differentiation and proliferation. Conclusions Metformin supplementation promotes secretory cell lineage differentiation, suppresses inflammation and improves epithelial barrier function in IL10KO mice likely through activation of AMPK, showing its beneficial effects on gut epithelial.
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146
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Czaja AJ. Factoring the intestinal microbiome into the pathogenesis of autoimmune hepatitis. World J Gastroenterol 2016; 22:9257-9278. [PMID: 27895415 PMCID: PMC5107691 DOI: 10.3748/wjg.v22.i42.9257] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2016] [Revised: 10/07/2016] [Accepted: 10/31/2016] [Indexed: 02/06/2023] Open
Abstract
The intestinal microbiome is a reservoir of microbial antigens and activated immune cells. The aims of this review were to describe the role of the intestinal microbiome in generating innate and adaptive immune responses, indicate how these responses contribute to the development of systemic immune-mediated diseases, and encourage investigations that improve the understanding and management of autoimmune hepatitis. Alterations in the composition of the intestinal microflora (dysbiosis) can disrupt intestinal and systemic immune tolerances for commensal bacteria. Toll-like receptors within the intestine can recognize microbe-associated molecular patterns and shape subsets of T helper lymphocytes that may cross-react with host antigens (molecular mimicry). Activated gut-derived lymphocytes can migrate to lymph nodes, and gut-derived microbial antigens can translocate to extra-intestinal sites. Inflammasomes can form within hepatocytes and hepatic stellate cells, and they can drive the pro-inflammatory, immune-mediated, and fibrotic responses. Diet, designer probiotics, vitamin supplements, re-colonization methods, antibiotics, drugs that decrease intestinal permeability, and molecular interventions that block signaling pathways may emerge as adjunctive regimens that complement conventional immunosuppressive management. In conclusion, investigations of the intestinal microbiome are warranted in autoimmune hepatitis and promise to clarify pathogenic mechanisms and suggest alternative management strategies.
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147
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Sturgeon C, Fasano A. Zonulin, a regulator of epithelial and endothelial barrier functions, and its involvement in chronic inflammatory diseases. Tissue Barriers 2016; 4:e1251384. [PMID: 28123927 DOI: 10.1080/21688370.2016.1251384] [Citation(s) in RCA: 276] [Impact Index Per Article: 34.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Revised: 10/14/2016] [Accepted: 10/14/2016] [Indexed: 12/15/2022] Open
Abstract
Beside digesting nutrients and absorbing solutes and electrolytes, the intestinal epithelium with its barrier function is in charge of a tightly controlled antigen trafficking from the intestinal lumen to the submucosa. This trafficking dictates the delicate balance between tolerance and immune response causing inflammation. Loss of barrier function secondary to upregulation of zonulin, the only known physiological modulator of intercellular tight junctions, leads to uncontrolled influx of dietary and microbial antigens. Additional insights on zonulin mechanism of action and the recent appreciation of the role that altered intestinal permeability can play in the development and progression of chronic inflammatory disorders has increased interest of both basic scientists and clinicians on the potential role of zonulin in the pathogenesis of these diseases. This review focuses on the recent research implicating zonulin as a master regulator of intestinal permeability linked to the development of several chronic inflammatory disorders.
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Affiliation(s)
- Craig Sturgeon
- Center for Celiac Research and Treatment, Mucosal Immunology and Biology Research Center, Massachusetts General Hospital and Division of Pediatric Gastroenterology and Nutrition, Boston, MA, USA; Graduate Program in Life Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Alessio Fasano
- Center for Celiac Research and Treatment, Mucosal Immunology and Biology Research Center, Massachusetts General Hospital and Division of Pediatric Gastroenterology and Nutrition, Boston, MA, USA; European Biomedical Research Institute of Salerno (EBRIS), Salerno, Italy
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148
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Ren C, Zhang Q, de Haan BJ, Zhang H, Faas MM, de Vos P. Identification of TLR2/TLR6 signalling lactic acid bacteria for supporting immune regulation. Sci Rep 2016; 6:34561. [PMID: 27708357 PMCID: PMC5052581 DOI: 10.1038/srep34561] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Accepted: 09/13/2016] [Indexed: 02/07/2023] Open
Abstract
Although many lactic acid bacteria (LAB) influence the consumer’s immune status it is not completely understood how this is established. Bacteria-host interactions between bacterial cell-wall components and toll-like receptors (TLRs) have been suggested to play an essential role. Here we investigated the interaction between LABs with reported health effects and TLRs. By using cell-lines expressing single or combination of TLRs, we show that LABs can signal via TLR-dependent and independent pathways. The strains only stimulated and did not inhibit TLRs. We found that several strains such as L. plantarum CCFM634, L. plantarum CCFM734, L. fermentum CCFM381, L. acidophilus CCFM137, and S. thermophilus CCFM218 stimulated TLR2/TLR6. TLR2/TLR6 is essential in immune regulatory processes and of interest for prevention of diseases. Specificity of the TLR2/TLR6 stimulation was confirmed with blocking antibodies. Immunomodulatory properties of LABs were also studied by assessing IL-10 and IL-6 secretion patterns in bacteria-stimulated THP1-derived macrophages, which confirmed species and strain specific effects of the LABs. With this study we provide novel insight in LAB specific host-microbe interactions. Our data demonstrates that interactions between pattern recognition receptors such as TLRs is species and strain specific and underpins the importance of selecting specific strains for promoting specific health effects.
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Affiliation(s)
- Chengcheng Ren
- Immunoendocrinology, Division of Medical Biology, Department of Pathology and Medical Biology, University of Groningen and University Medical Center Groningen, Hanzeplein 1, 9700 RB Groningen, The Netherlands.,School of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China
| | - Qiuxiang Zhang
- School of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China
| | - Bart J de Haan
- Immunoendocrinology, Division of Medical Biology, Department of Pathology and Medical Biology, University of Groningen and University Medical Center Groningen, Hanzeplein 1, 9700 RB Groningen, The Netherlands
| | - Hao Zhang
- School of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China
| | - Marijke M Faas
- Immunoendocrinology, Division of Medical Biology, Department of Pathology and Medical Biology, University of Groningen and University Medical Center Groningen, Hanzeplein 1, 9700 RB Groningen, The Netherlands
| | - Paul de Vos
- Immunoendocrinology, Division of Medical Biology, Department of Pathology and Medical Biology, University of Groningen and University Medical Center Groningen, Hanzeplein 1, 9700 RB Groningen, The Netherlands
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149
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Tunis MC, Dawod B, Carson KR, Veinotte LL, Marshall JS. Toll-like receptor 2 activators modulate oral tolerance in mice. Clin Exp Allergy 2016; 45:1690-702. [PMID: 26242919 PMCID: PMC5019435 DOI: 10.1111/cea.12605] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2014] [Revised: 06/18/2015] [Accepted: 07/03/2015] [Indexed: 01/29/2023]
Abstract
BACKGROUND Toll-like receptor 2 (TLR2) is a widely expressed pattern recognition receptor critical for innate immunity. TLR2 is also a key regulator of mucosal immunity implicated in the development of allergic disease. TLR2 activators are found in many common foods, but the role of TLR2 in oral tolerance and allergic sensitization to foods is not well understood. OBJECTIVE The purpose of this study was to evaluate the impacts of TLR2 expression and TLR2 activation on oral tolerance to food antigens in a murine model. METHODS Mice were fed ovalbumin (OVA) or peanut butter with or without the addition of low doses of TLR2 activators Pam3 CSK4 or FSL-1. Oral tolerance was assessed by analysing antibody responses after a systemic antigen challenge. OVA-specific Tregs were assessed in the Peyer's patches, mesenteric lymph nodes, and spleen in wild-type and TLR2(-/-) mice. Low-dose Pam3 CSK4 was also tested as an oral adjuvant. RESULTS Oral tolerance was successfully induced in both wild-type and TLR2(-/-) recipient mice, with an associated regulatory T-cell response. Oral TLR2 activation, with low-dose Pam3 CSK4 or FSL-1, during oral antigen exposure was found to alter oral tolerance and was associated with the development of substantial IgE and IgA responses to foods upon systemic challenge. Low-dose oral Pam3 CSK4 treatment also selectively enhanced antigen-specific IgA responses to oral antigen exposure. CONCLUSIONS AND CLINICAL RELEVANCE TLR2 is not necessary for oral tolerance induction, but oral TLR2 activation modulates humoral IgE and IgA responses during tolerance development. Low-dose Pam3 CSK4 is also an effective oral adjuvant that selectively enhances IgA production. These observations are pertinent to the optimization of oral allergen immunotherapy and oral vaccine development.
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Affiliation(s)
- M C Tunis
- Department of Microbiology and Immunology, Dalhousie University, Halifax, NS, Canada.,Dalhousie Inflammation Group, Dalhousie University, Halifax, NS, Canada
| | - B Dawod
- Dalhousie Inflammation Group, Dalhousie University, Halifax, NS, Canada.,Department of Pathology, Dalhousie University, Halifax, NS, Canada
| | - K R Carson
- Department of Microbiology and Immunology, Dalhousie University, Halifax, NS, Canada.,Dalhousie Inflammation Group, Dalhousie University, Halifax, NS, Canada
| | - L L Veinotte
- Department of Microbiology and Immunology, Dalhousie University, Halifax, NS, Canada.,Dalhousie Inflammation Group, Dalhousie University, Halifax, NS, Canada
| | - J S Marshall
- Department of Microbiology and Immunology, Dalhousie University, Halifax, NS, Canada.,Dalhousie Inflammation Group, Dalhousie University, Halifax, NS, Canada.,Department of Pathology, Dalhousie University, Halifax, NS, Canada
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150
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Yang GY, Zhu YH, Zhang W, Zhou D, Zhai CC, Wang JF. Influence of orally fed a select mixture of Bacillus probiotics on intestinal T-cell migration in weaned MUC4 resistant pigs following Escherichia coli challenge. Vet Res 2016; 47:71. [PMID: 27424033 PMCID: PMC4947265 DOI: 10.1186/s13567-016-0355-8] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2016] [Accepted: 06/27/2016] [Indexed: 12/14/2022] Open
Abstract
Efficient strategies for treating enteritis caused by F4+ enterotoxigenic Escherichia coli (ETEC)/verocytotoxigenic Escherichia coli (VTEC)/enteropathogenic E. coli (EPEC) in mucin 4 resistant (MUC4 RR; supposed to be F4ab/ac receptor–negative [F4ab/acR−]) pigs remain elusive. A low (3.9 × 108 CFU/day) or high (7.8 × 108 CFU/day) dose of Bacillus licheniformis and Bacillus subtilis spore mixture (BLS-mix) was orally administered to MUC4 RR piglets for 1 week before F4+ ETEC/VTEC/EPEC challenge. Orally fed BLS-mix upregulated the expression of TLR4, NOD2, iNOS, IL-8, and IL-22 mRNAs in the small intestine of pigs challenged with E. coli. Expression of chemokine CCL28 and its receptor CCR10 mRNAs was upregulated in the jejunum of pigs pretreated with high-dose BLS-mix. Low-dose BLS-mix pretreatment induced an increase in the proportion of peripheral blood CD4−CD8− T-cell subpopulations and high-dose BLS-mix induced the expansion of CD4−CD8− T cells in the inflamed intestine. Immunostaining revealed that considerable IL-7Rα–expressing cells accumulated at the lamina propria of the inflamed intestines after E. coli challenge, even in pigs pretreated with either low- or high-dose BLS-mix, although Western blot analysis of IL-7Rα expression in the intestinal mucosa did not show any change. Our data indicate that oral administration of the probiotic BLS-mix partially ameliorates E. coli-induced enteritis through facilitating upregulation of intestinal IL-22 and IκBα expression, and preventing loss of intestinal epithelial barrier integrity via elevating ZO-1 expression. However, IL-22 also elicits an inflammatory response in inflamed intestines as a result of infection with enteropathogenic bacteria.
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Affiliation(s)
- Gui-Yan Yang
- College of Veterinary Medicine, China Agricultural University, Beijing, 100193, China
| | - Yao-Hong Zhu
- College of Veterinary Medicine, China Agricultural University, Beijing, 100193, China
| | - Wei Zhang
- College of Veterinary Medicine, China Agricultural University, Beijing, 100193, China
| | - Dong Zhou
- College of Veterinary Medicine, China Agricultural University, Beijing, 100193, China
| | - Cong-Cong Zhai
- College of Veterinary Medicine, China Agricultural University, Beijing, 100193, China
| | - Jiu-Feng Wang
- College of Veterinary Medicine, China Agricultural University, Beijing, 100193, China.
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