1
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Dong X, Qi M, Cai C, Zhu Y, Li Y, Coulter S, Sun F, Liddle C, Uboha NV, Halberg R, Xu W, Marker P, Fu T. Farnesoid X receptor mediates macrophage-intrinsic responses to suppress colitis-induced colon cancer progression. JCI Insight 2024; 9:e170428. [PMID: 38258906 PMCID: PMC10906220 DOI: 10.1172/jci.insight.170428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Accepted: 12/05/2023] [Indexed: 01/24/2024] Open
Abstract
Bile acids (BAs) affect the intestinal environment by ensuring barrier integrity, maintaining microbiota balance, regulating epithelium turnover, and modulating the immune system. As a master regulator of BA homeostasis, farnesoid X receptor (FXR) is severely compromised in patients with inflammatory bowel disease (IBD) and colitis-associated colorectal cancer (CAC). At the front line, gut macrophages react to the microbiota and metabolites that breach the epithelium. We aim to study the role of the BA/FXR axis in macrophages. This study demonstrates that inflammation-induced epithelial abnormalities compromised FXR signaling and altered BAs' profile in a mouse CAC model. Further, gut macrophage-intrinsic FXR sensed aberrant BAs, leading to pro-inflammatory cytokines' secretion, which promoted intestinal stem cell proliferation. Mechanistically, activation of FXR ameliorated intestinal inflammation and inhibited colitis-associated tumor growth, by regulating gut macrophages' recruitment, polarization, and crosstalk with Th17 cells. However, deletion of FXR in bone marrow or gut macrophages escalated the intestinal inflammation. In summary, our study reveals a distinctive regulatory role of FXR in gut macrophages, suggesting its potential as a therapeutic target for addressing IBD and CAC.
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Affiliation(s)
- Xingchen Dong
- Pharmaceutical Sciences Division, School of Pharmacy, University of Wisconsin Carbone Cancer Center (UWCCC), University of Wisconsin–Madison, Madison, Wisconsin, USA
| | - Ming Qi
- Pharmaceutical Sciences Division, School of Pharmacy, University of Wisconsin Carbone Cancer Center (UWCCC), University of Wisconsin–Madison, Madison, Wisconsin, USA
| | - Chunmiao Cai
- Pharmaceutical Sciences Division, School of Pharmacy, University of Wisconsin Carbone Cancer Center (UWCCC), University of Wisconsin–Madison, Madison, Wisconsin, USA
| | - Yu Zhu
- Department of Pathology, School of Medicine, Stanford University, Palo Alto, California, USA
| | - Yuwenbin Li
- Gene Expression Laboratory, Salk Institute for Biological Studies, La Jolla, California, USA
| | - Sally Coulter
- Storr Liver Centre, The Westmead Institute for Medical Research and Sydney Medical School, University of Sydney, Westmead Hospital, Westmead, New South Wales, Australia
| | - Fei Sun
- Pharmaceutical Sciences Division, School of Pharmacy, University of Wisconsin Carbone Cancer Center (UWCCC), University of Wisconsin–Madison, Madison, Wisconsin, USA
| | - Christopher Liddle
- Storr Liver Centre, The Westmead Institute for Medical Research and Sydney Medical School, University of Sydney, Westmead Hospital, Westmead, New South Wales, Australia
| | | | - Richard Halberg
- McArdle Laboratory for Cancer Research, School of Medicine and Public Health, University of Wisconsin–Madison, Madison, Wisconsin, USA
| | - Wei Xu
- McArdle Laboratory for Cancer Research, School of Medicine and Public Health, University of Wisconsin–Madison, Madison, Wisconsin, USA
| | - Paul Marker
- Pharmaceutical Sciences Division, School of Pharmacy, University of Wisconsin Carbone Cancer Center (UWCCC), University of Wisconsin–Madison, Madison, Wisconsin, USA
| | - Ting Fu
- Pharmaceutical Sciences Division, School of Pharmacy, University of Wisconsin Carbone Cancer Center (UWCCC), University of Wisconsin–Madison, Madison, Wisconsin, USA
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Safari F, Sharifi M, Talebi A, Mehranfard N, Ghasemi M. Alleviation of cholestatic liver injury and intestinal permeability by lubiprostone treatment in bile duct ligated rats: role of intestinal FXR and tight junction proteins claudin-1, claudin-2, and occludin. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2023; 396:2009-2022. [PMID: 36897372 DOI: 10.1007/s00210-023-02455-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Accepted: 02/28/2023] [Indexed: 03/11/2023]
Abstract
Gut barrier disintegrity and endotoxin translocation to the liver and systemic circulation are serious clinical complications associated with the stoppage of intestinal bile flow. There is no precise pharmacological option to prevent increased intestinal permeability after bile duct ligation (BDL). Lubiprostone, a chloride channel-2 agonist, has been shown to accelerate restoration of epithelial barrier dysfunction caused by injury, but the exact mechanisms underlying the beneficial effects of lubiprostone on intestine barrier integrity remain unknown. Here, we assessed the beneficial effect of lubiprostone on cholestasis caused by BDL and relevant mechanisms. Male rats were subjected to BDL for 21 days. Seven days after BDL induction, lubiprostone was administered twice daily (10 µg/kg of body weight). Intestinal permeability was assessed through measurements of serum lipopolysaccharide (LPS) concentration. Real-time PCR was conducted to assess expression of intestinal claudin-1 occludin and FXR genes, which are important in preserving the intestinal epithelial barrier integrity, as well as claudin-2 being involved in a leaky gut barrier. Histopathological alterations were also monitored for liver injury. Lubiprostone significantly decreased BDL-induced systemic LPS elevation in rats. BDL induced a significant reduction in FXR, occludin, and claudin-1 genes expression, while increased claudin-2 expression in rat colon. Treatment with lubiprostone significantly restored expression of these genes to the control values. BDL also increased the level of hepatic enzymes ALT, ALP, AST, and total bilirubin, while lubiprostone could preserve the hepatic enzymes and total bilirubin in the treated BDL rats. Lubiprostone also caused a significant reduction in BDL-induced liver fibrosis and intestinal damage in rats. Our results suggest that lubiprostone favorably prevents BDL-induced alterations in intestinal epithelial barrier integrity possibly via modulating intestinal FXRs and tight junction gene expression.
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Affiliation(s)
- Fereydoon Safari
- Department of Physiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mohammadreza Sharifi
- Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Ardeshir Talebi
- Department of Pathology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Nasrin Mehranfard
- Neurophysiology Research Center, Cellular and Molecular Medicine Research Institute, Urmia University of Medical Sciences, Urmia, Iran
| | - Maedeh Ghasemi
- Department of Physiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.
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3
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Li G, Wang X, Liu Y, Gong S, Yang Y, Wang C, Wang H, He D. Bile acids supplementation modulates lipid metabolism, intestinal function, and cecal microbiota in geese. Front Microbiol 2023; 14:1185218. [PMID: 37303790 PMCID: PMC10250614 DOI: 10.3389/fmicb.2023.1185218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Accepted: 05/15/2023] [Indexed: 06/13/2023] Open
Abstract
Bile acids(BAs) are important components of bile and play a significant role in fat metabolism. However, there is currently no systematic evaluation of the use of BAs as feed additives for geese.This study aimed to investigate the effects of adding BAs to goose feed on growth performance, lipid metabolism, intestinal morphology, mucosal barrier function, and cecal microbiota. A total of 168 28-day-old geese were randomly assigned to four treatment groups and fed diets supplemented with 0, 75, 150, or 300 mg/kg of BAs for 28 days. The addition of 75 and 150 mg/kg of BAs significantly improved the feed/gain (F/G) (p < 0.05).The addition of BAs decreased abdominal fat percentage and serum total cholesterol (TC) levels, with 150 mg/kg of BAs significantly reducing serum triglyceride levels and increased expression of Farnesoid X Receptor (FXR) mRNA in the liver(p < 0.05), 300 mg/kg of BAs significantly increasing the expression level of liver peroxisome proliferator-activated receptor α (PPARα) (p < 0.05). In terms of intestinal morphology and mucosal barrier function, 150 mg/kg of BAs significantly increased villus height (VH) and VH/crypt depth (CD) in the jejunum (p < 0.05). The addition of 150 and 300 mg/kg of BAs significantly reduced the CD in the ileum, while increasing VH and VH/CD (p<0.05). Additionally, the addition of 150 and 300 mg/kg of BAs significantly increased the expression levels of zonula occludens-1 (ZO-1) and occludin in the jejunum. Simultaneously 150mg/kg and 300mg/kg BAs increased the total short-chain fatty acids (SCFA) concentrations in the jejunum and cecum(p < 0.05).Supplementation with BAs resulted in a significant increase in the ɑ-diversity of cecal microbiota and a decrease in the abundance of Proteobacteria in the cecum. The addition of 150 mg/kg of BAs significantly reduced the abundance of Bacteroidetes and increased the abundance of Firmicutes. Moreover,Linear discriminant analysis Effect Size analysis (LEfSe) showed that the abundances of bacteria producing SCFA and bile salt hydrolases (BSH) were increased in the BAs-treated group. Furthermore, Spearman's analysis showed that the genus Balutia, which is negatively correlated with visceral fat area, was positively correlated with serum high-density lipoprotein cholesterol (HDL-C), while Clostridium was positively correlated with intestinal VH and VH/CD. In conclusion, BAs can be considered an effective feed additive for geese, as they increased SCFA concentration, improve lipid metabolism and intestinal health by enhancing the intestinal mucosal barrier, improving intestinal morphology, and altering the cecal microbiota structure.
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Yang J, van Dijk TH, Koehorst M, Havinga R, de Boer JF, Kuipers F, van Zutphen T. Intestinal Farnesoid X Receptor Modulates Duodenal Surface Area but Does Not Control Glucose Absorption in Mice. Int J Mol Sci 2023; 24:ijms24044132. [PMID: 36835544 PMCID: PMC9961586 DOI: 10.3390/ijms24044132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 01/18/2023] [Accepted: 02/10/2023] [Indexed: 02/22/2023] Open
Abstract
Bile acids facilitate the intestinal absorption of dietary lipids and act as signalling molecules in the maintenance of metabolic homeostasis. Farnesoid X receptor (FXR) is a bile acid-responsive nuclear receptor involved in bile acid metabolism, as well as lipid and glucose homeostasis. Several studies have suggested a role of FXR in the control of genes regulating intestinal glucose handling. We applied a novel dual-label glucose kinetic approach in intestine-specific FXR-/- mice (iFXR-KO) to directly assess the role of intestinal FXR in glucose absorption. Although iFXR-KO mice showed decreased duodenal expression of hexokinase 1 (Hk1) under obesogenic conditions, the assessment of glucose fluxes in these mice did not show a role for intestinal FXR in glucose absorption. FXR activation with the specific agonist GS3972 induced Hk1, yet the glucose absorption rate remained unaffected. FXR activation increased the duodenal villus length in mice treated with GS3972, while stem cell proliferation remained unaffected. Accordingly, iFXR-KO mice on either chow, short or long-term HFD feeding displayed a shorter villus length in the duodenum compared to wild-type mice. These findings indicate that delayed glucose absorption reported in whole-body FXR-/- mice is not due to the absence of intestinal FXR. Yet, intestinal FXR does have a role in the small intestinal surface area.
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Affiliation(s)
- Jiufang Yang
- Department of Pediatrics, University of Groningen, University Medical Center Groningen, 9700RB Groningen, The Netherlands
| | - Theo H. van Dijk
- Department of Pediatrics, University of Groningen, University Medical Center Groningen, 9700RB Groningen, The Netherlands
| | - Martijn Koehorst
- Department of Laboratory Medicine, University of Groningen, University Medical Center Groningen, 9700RB Groningen, The Netherlands
| | - Rick Havinga
- Department of Pediatrics, University of Groningen, University Medical Center Groningen, 9700RB Groningen, The Netherlands
| | - Jan Freark de Boer
- Department of Pediatrics, University of Groningen, University Medical Center Groningen, 9700RB Groningen, The Netherlands
| | - Folkert Kuipers
- Department of Pediatrics, University of Groningen, University Medical Center Groningen, 9700RB Groningen, The Netherlands
- Department of Laboratory Medicine, University of Groningen, University Medical Center Groningen, 9700RB Groningen, The Netherlands
- European Research Institute for the Biology of Ageing (ERIBA), University of Groningen, University Medical Center Groningen, 9700RB Groningen, The Netherlands
- Correspondence: (F.K.); (T.v.Z.); Tel.: +31-58-288-2132 (F.K.)
| | - Tim van Zutphen
- Department of Pediatrics, University of Groningen, University Medical Center Groningen, 9700RB Groningen, The Netherlands
- Faculty Campus Fryslân, University of Groningen, 8911CE Leeuwarden, The Netherlands
- Correspondence: (F.K.); (T.v.Z.); Tel.: +31-58-288-2132 (F.K.)
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5
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Abstract
The pleiotropic actions of the Farnesoid X Receptor (FXR) are required for gut health, and reciprocally, reduced intestinal FXR signaling is seen in inflammatory bowel diseases (IBDs). Here, we show that activation of FXR selectively in the intestine is protective in inflammation-driven models of IBD. Prophylactic activation of FXR restored homeostatic levels of pro-inflammatory cytokines, most notably IL17. Importantly, these changes were attributed to FXR regulation of innate lymphoid cells (ILCs), with both the inflammation-driven increases in ILCs, and ILC3s in particular, and the induction of Il17a and Il17f in ILC3s blocked by FXR activation. Moreover, a population of ILC precursor-like cells increased with treatment, implicating FXR in the maturation/differentiation of ILC precursors. These findings identify FXR as an intrinsic regulator of intestinal ILCs and a potential therapeutic target in inflammatory intestinal diseases.
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Tang K, Kong D, Peng Y, Guo J, Zhong Y, Yu H, Mai Z, Chen Y, Chen Y, Cui T, Duan S, Li T, Liu N, Zhang D, Ding Y, Huang J. Ginsenoside Rc attenuates DSS-induced ulcerative colitis, intestinal inflammatory, and barrier function by activating the farnesoid X receptor. Front Pharmacol 2022; 13:1000444. [PMID: 36386150 PMCID: PMC9649634 DOI: 10.3389/fphar.2022.1000444] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Accepted: 09/26/2022] [Indexed: 08/03/2023] Open
Abstract
Objectives: Farnesoid X receptor (FXR) activation is involved in ameliorating inflammatory bowel disease (IBD), such as ulcerative colitis (UC), and inflammatory regulation may be involved in its mechanism. Ginsenoside Rc (Rc) is a major component of Panax ginseng, and it plays an excellent role in the anti-inflammatory processes. Our aim is to explore the alleviative effect of Rc on dextran sulfate sodium (DSS)-induced inflammation and deficiencies in barrier function based on FXR signaling. Materials and Methods: In vitro, we treated human intestinal epithelial cell lines (LS174T) with LPS to explore the anti-inflammatory effect of Rc supplementation. In vivo, a DSS-induced IBD mice model was established, and the changes in inflammatory and barrier function in colons after Rc treatment were measured using the disease activity index (DAI), hematoxylin and eosin (H&E) staining, immunofluorescence, ELISA, and qPCR. Molecular docking analysis, luciferase reporter gene assay, and qPCR were then used to analyze the binding targets of Rc. DSS-induced FXR-knockout (FXR-/-) mice were used for further validation. Results: Rc significantly recovered the abnormal levels of inflammation indexes (TNF-α, IL-6, IL-1β, and NF-KB) induced by LPS in LS174T. DSS-induced C57BL/6 mice exhibited a significantly decreased body weight and elevated DAI, as well as a decrease in colon weight and length. Increased inflammatory markers (TNF-α, IL-6, IL-1β, ICAM1, NF-KB, F4/80, and CD11b displayed an increased expression) and damaged barrier function (Claudin-1, occludin, and ZO-1 displayed a decreased expression) were observed in DSS-induced C57BL/6 mice. Nevertheless, supplementation with Rc mitigated the increased inflammatory and damaged barrier function associated with DSS. Further evaluation revealed an activation of FXR signaling in Rc-treated LS174T, with FXR, BSEP, and SHP found to be upregulated. Furthermore, molecular docking indicated that there is a clear interaction between Rc and FXR, while Rc activated transcriptional expression of FXR in luciferase reporter gene assay. However, these reversal abilities of Rc were not observed in DSS-induced FXR-/- mice. Conclusion: Our findings suggest that Rc may ameliorate inflammation and barrier function in the intestine, which in turn leads to the attenuation of DSS-induced UC, in which Rc may potentially activate FXR signaling to protect the intestines from DSS-induced injury.
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Affiliation(s)
- Kaijia Tang
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Danli Kong
- Department of Epidemiology and Medical Statistics, School of Public Health, Guangdong Medical University, Dongguan, China
| | - Yuan Peng
- Department of Pharmacy, Affiliated Hospital of North Sichuan Medical College, Nanchong, China
| | - Jingyi Guo
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yadi Zhong
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Haibing Yu
- Department of Epidemiology and Medical Statistics, School of Public Health, Guangdong Medical University, Dongguan, China
| | - Zhenhua Mai
- Department of Critical Care Medicine, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Yanling Chen
- The First Clinical Medical College of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yingjian Chen
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Tianqi Cui
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Siwei Duan
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Tianyao Li
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Naihua Liu
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Dong Zhang
- The Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, China
| | - Yuanlin Ding
- Department of Epidemiology and Medical Statistics, School of Public Health, Guangdong Medical University, Dongguan, China
| | - Jiawen Huang
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China
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Ortiz-López N, Fuenzalida C, Dufeu MS, Pinto-León A, Escobar A, Poniachik J, Roblero JP, Valenzuela-Pérez L, Beltrán CJ. The immune response as a therapeutic target in non-alcoholic fatty liver disease. Front Immunol 2022; 13:954869. [PMID: 36300120 PMCID: PMC9589255 DOI: 10.3389/fimmu.2022.954869] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 09/21/2022] [Indexed: 08/25/2023] Open
Abstract
Non-alcoholic fatty liver disease (NAFLD) is a complex and heterogeneous disorder considered a liver-damaging manifestation of metabolic syndrome. Its prevalence has increased in the last decades due to modern-day lifestyle factors associated with overweight and obesity, making it a relevant public health problem worldwide. The clinical progression of NAFLD is associated with advanced forms of liver injury such as fibrosis, cirrhosis, and hepatocellular carcinoma (HCC). As such, diverse pharmacological strategies have been implemented over the last few years, principally focused on metabolic pathways involved in NAFLD progression. However, a variable response rate has been observed in NAFLD patients, which is explained by the interindividual heterogeneity of susceptibility to liver damage. In this scenario, it is necessary to search for different therapeutic approaches. It is worth noting that chronic low-grade inflammation constitutes a central mechanism in the pathogenesis and progression of NAFLD, associated with abnormal composition of the intestinal microbiota, increased lymphocyte activation in the intestine and immune effector mechanisms in liver. This review aims to discuss the current knowledge about the role of the immune response in NAFLD development. We have focused mainly on the impact of altered gut-liver-microbiota axis communication on immune cell activation in the intestinal mucosa and the role of subsequent lymphocyte homing to the liver in NAFLD development. We further discuss novel clinical trials that addressed the control of the liver and intestinal immune response to complement current NAFLD therapies.
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Affiliation(s)
- Nicolás Ortiz-López
- Laboratory of Immunogastroenterology, Unit of Gastroenterology, Department of Medicine, Hospital Clínico Universidad de Chile, Santiago, Chile
- School of Medicine, Faculty of Medicine, Universidad de Chile, Santiago, Chile
| | - Catalina Fuenzalida
- Laboratory of Immunogastroenterology, Unit of Gastroenterology, Department of Medicine, Hospital Clínico Universidad de Chile, Santiago, Chile
- School of Medicine, Faculty of Medicine, Universidad de Chile, Santiago, Chile
| | - María Soledad Dufeu
- Laboratory of Immunogastroenterology, Unit of Gastroenterology, Department of Medicine, Hospital Clínico Universidad de Chile, Santiago, Chile
- School of Medicine, Faculty of Medicine, Universidad de Chile, Santiago, Chile
| | - Araceli Pinto-León
- Laboratory of Immunogastroenterology, Unit of Gastroenterology, Department of Medicine, Hospital Clínico Universidad de Chile, Santiago, Chile
| | | | - Jaime Poniachik
- Unit of Gastroenterology, Department of Medicine, Hospital Clínico Universidad de Chile, Santiago, Chile
| | - Juan Pablo Roblero
- Unit of Gastroenterology, Department of Medicine, Hospital Clínico Universidad de Chile, Santiago, Chile
| | - Lucía Valenzuela-Pérez
- Laboratory of Immunogastroenterology, Unit of Gastroenterology, Department of Medicine, Hospital Clínico Universidad de Chile, Santiago, Chile
- School of Medicine, Faculty of Medicine, Universidad de Chile, Santiago, Chile
| | - Caroll J. Beltrán
- Laboratory of Immunogastroenterology, Unit of Gastroenterology, Department of Medicine, Hospital Clínico Universidad de Chile, Santiago, Chile
- School of Medicine, Faculty of Medicine, Universidad de Chile, Santiago, Chile
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8
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Zhou M, Wang D, Li X, Cao Y, Yi C, Wiredu Ocansey DK, Zhou Y, Mao F. Farnesoid-X receptor as a therapeutic target for inflammatory bowel disease and colorectal cancer. Front Pharmacol 2022; 13:1016836. [PMID: 36278234 PMCID: PMC9583386 DOI: 10.3389/fphar.2022.1016836] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Accepted: 09/20/2022] [Indexed: 12/09/2022] Open
Abstract
Farnesoid-X receptor (FXR), as a nuclear receptor activated by bile acids, is a vital molecule involved in bile acid metabolism. Due to its expression in immune cells, FXR has a significant effect on the function of immune cells and the release of chemokines when immune cells sense changes in bile acids. In addition to its regulation by ligands, FXR is also controlled by post-translational modification (PTM) activities such as acetylation, SUMOylation, and methylation. Due to the high expression of FXR in the liver and intestine, it significantly influences intestinal homeostasis under the action of enterohepatic circulation. Thus, FXR protects the intestinal barrier, resists bacterial infection, reduces oxidative stress, inhibits inflammatory reactions, and also acts as a tumor suppressor to impair the multiplication and invasion of tumor cells. These potentials provide new perspectives on the treatment of intestinal conditions, including inflammatory bowel disease (IBD) and its associated colorectal cancer (CRC). Moreover, FXR agonists on the market have certain organizational heterogeneity and may be used in combination with other drugs to achieve a greater therapeutic effect. This review summarizes current data on the role of FXR in bile acid metabolism, regulation of immune cells, and effects of the PTM of FXR. The functions of FXR in intestinal homeostasis and potential application in the treatment of IBD and CRC are discussed.
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Affiliation(s)
- Mengjiao Zhou
- Key Laboratory of Medical Science and Laboratory Medicine of Jiangsu Province, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China
| | - Danfeng Wang
- Nanjing Jiangning Hospital, Nanjing, Jiangsu, China
| | - Xiang Li
- Key Laboratory of Medical Science and Laboratory Medicine of Jiangsu Province, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China
| | - Ying Cao
- Key Laboratory of Medical Science and Laboratory Medicine of Jiangsu Province, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China
| | - Chengxue Yi
- School of Medical Technology, Zhenjiang College, Zhenjiang, Jiangsu, China
| | - Dickson Kofi Wiredu Ocansey
- Key Laboratory of Medical Science and Laboratory Medicine of Jiangsu Province, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China
- Directorate of University Health Services, University of Cape Coast, Cape Coast, Ghana
| | - Yuling Zhou
- Nanjing Jiangning Hospital, Nanjing, Jiangsu, China
- *Correspondence: Yuling Zhou, ; Fei Mao,
| | - Fei Mao
- Key Laboratory of Medical Science and Laboratory Medicine of Jiangsu Province, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China
- *Correspondence: Yuling Zhou, ; Fei Mao,
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9
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Fallon CM, Smyth JS, Quach A, Lajczak-McGinley N, O’Toole A, Barrett KE, Sheridan H, Keely SJ. Pentacyclic triterpenes modulate farnesoid X receptor expression in colonic epithelial cells: implications for colonic secretory function. J Biol Chem 2022; 298:102569. [PMID: 36209824 PMCID: PMC9663526 DOI: 10.1016/j.jbc.2022.102569] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 10/01/2022] [Accepted: 10/04/2022] [Indexed: 11/06/2022] Open
Abstract
The nuclear bile acid receptor, farnesoid X receptor (FXR), is an important regulator of intestinal and metabolic function. Previous studies suggest that pentacyclic triterpenes (PCTs), a class of plant-derived bioactive phytochemical, can modulate FXR activity and may therefore offer therapeutic benefits. Here, we investigated the effects of a prototypical PCT, hederagenin (HG), on FXR expression, activity, and antisecretory actions in colonic epithelial cells. T84 cells and murine enteroid-derived monolayers were employed to assess HG effects on FXR expression and activity in colonic epithelia. We measured mRNA levels by qRT-PCR and protein by ELISA and immunoblotting. Transepithelial Cl− secretion was assessed as changes in short circuit current in Ussing chambers. We determined HG treatment (5–10 μM) alone did not induce FXR activation but significantly increased expression of the receptor, both in T84 cells and murine enteroid-derived monolayers. This effect was accompanied by enhanced FXR activity, as assessed by FGF-15/19 induction in response to the synthetic, GW4064, or natural FXR agonist, chenodeoxycholic acid. Effects of HG on FXR expression and activity were mimicked by another PCT, oleanolic acid. Furthermore, we found FXR-induced downregulation of cystic fibrosis transmembrane conductance regulator Cl− channels and inhibition of transepithelial Cl− secretion were enhanced in HG-treated cells. These data demonstrate that dietary PCTs have the capacity to modulate FXR expression, activity, and antisecretory actions in colonic epithelial cells. Based on these data, we propose that plants rich in PCTs, or extracts thereof, have excellent potential for development as a new class of “FXR-targeted nutraceuticals”.
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10
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Godlewska U, Bulanda E, Wypych TP. Bile acids in immunity: Bidirectional mediators between the host and the microbiota. Front Immunol 2022; 13:949033. [PMID: 36052074 PMCID: PMC9425027 DOI: 10.3389/fimmu.2022.949033] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Accepted: 07/26/2022] [Indexed: 01/03/2023] Open
Abstract
Host-microbiota interactions are bidirectional. On one hand, ecological pressures exerted by the host shape the composition and function of the microbiota. On the other, resident microbes trigger multiple pathways that influence the immunity of the host. Bile acids participate in both parts of this interplay. As host-derived compounds, they display bacteriostatic properties and affect the survival and growth of the members of the microbial community. As microbiota-modified metabolites, they further influence the microbiota composition and, in parallel, modulate the immunity of the host. Here, we provide a comprehensive overview of the mechanisms behind this unique dialogue and discuss how we can harness bile acids to treat intestinal inflammation.
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11
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Yan M, Hou L, Cai Y, Wang H, Ma Y, Geng Q, Jiang W, Tang W. Effects of Intestinal FXR-Related Molecules on Intestinal Mucosal Barriers in Biliary Tract Obstruction. Front Pharmacol 2022; 13:906452. [PMID: 35770078 PMCID: PMC9234329 DOI: 10.3389/fphar.2022.906452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Accepted: 05/18/2022] [Indexed: 11/24/2022] Open
Abstract
Background: The farnesoid X receptor (FXR) is a key factor regulating hepatic bile acid synthesis and enterohepatic circulation. Repression of bile acid synthesis by the FXR is a potential strategy for treating cholestatic liver disease. However, the role of intestinal FXR on the intestinal barrier and intestinal microbiota needs further investigation. Materials: Intestinal tissues were collected from patients with biliary atresia or without hepatobiliary disease. Then, intestinal mRNA levels of FXR-related molecules were determined. To investigate the effect of FXR activation, bile-duct-ligation rats were treated with obeticholic acid [OCA (5 mg/kg/day)] or vehicle (0.5% methyl cellulose) per oral gavage for 14 days. The mRNA levels of intestinal FXR, SHP, TNF-α, FGF15 and bile acid transporter levels were determined. In addition, the intestinal permeability, morphologic changes, and composition of the intestinal microbiota were evaluated. Gut Microbiome was determined by 16S rDNA MiSeq sequencing, and functional profiling of microbial communities was predicted with BugBase and PICRUSt2. Finally, the role of OCA in injured intestinal epithelial cell apoptosis and proliferation was examined by pretreatment with lipopolysaccharide (LPS) in Caco-2 cells. Results: The downstream of the FXR in ileum tissues was inhibited in biliary obstruction. Activation of the FXR signaling pathway by OCA significantly reduced liver fibrosis and intestinal inflammation, improved intestinal microbiota, and protected intestinal mucosa in BDL rats. OCA also altered the functional capacities of ileum microbiota in BDL rats. Significant differences existed between the controls and BDL rats, which were attenuated by OCA in the alpha diversity analysis. Principal coordinates analysis showed that microbial communities in BDL rats clustered separately from controls, and OCA treatment attenuated the distinction. Bugbase and PICRUSt2 analysis showed that OCA changed the composition and structure of the intestinal microbiota and improved the metabolic function of the intestinal microbiota by increasing the relative abundance of beneficial bacteria and reducing the relative abundance of harmful bacteria. Moreover, OCA reduced the apoptosis induced by LPS in Caco-2 cells. Conclusion: The FXR agonist, OCA, activates the intestinal FXR signaling pathway and improves the composition and structure of the intestinal microbiota and intestinal barrier in BDL rats.
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Affiliation(s)
- Meng Yan
- Department of Pediatric Surgery, Children’s Hospital of Nanjing Medical University, Nanjing, China
- Department of Pediatrics, Huai’an Maternal And Child Health Care center, Huai’an, China
| | - Li Hou
- Department of Pediatric Surgery, Children’s Hospital of Nanjing Medical University, Nanjing, China
| | - Yaoyao Cai
- Department of Pediatric Surgery, Children’s Hospital of Nanjing Medical University, Nanjing, China
| | - Hanfei Wang
- Department of Pediatric Surgery, Children’s Hospital of Nanjing Medical University, Nanjing, China
| | - Yujun Ma
- Department of Pediatric Surgery, Children’s Hospital of Nanjing Medical University, Nanjing, China
| | - Qiming Geng
- Department of Pediatric Surgery, Children’s Hospital of Nanjing Medical University, Nanjing, China
| | - Weiwei Jiang
- Department of Pediatric Surgery, Children’s Hospital of Nanjing Medical University, Nanjing, China
- *Correspondence: Weiwei Jiang, ; Weibing Tang,
| | - Weibing Tang
- Department of Pediatric Surgery, Children’s Hospital of Nanjing Medical University, Nanjing, China
- *Correspondence: Weiwei Jiang, ; Weibing Tang,
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12
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Bile Acids and the Microbiome: Making Sense of This Dynamic Relationship in Their Role and Management in Crohn's Disease. Can J Gastroenterol Hepatol 2022; 2022:8416578. [PMID: 35360442 PMCID: PMC8964223 DOI: 10.1155/2022/8416578] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Accepted: 03/05/2022] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Bile acids help maintain the physiological balance of the gut microbiome and the integrity of the intestinal epithelial barrier. Similarly, intestinal bacteria play a major role in bile acid metabolism as they are involved in crucial biotransformation steps in the enterohepatic circulation pathway. Understanding the relationship between bile acid signalling and the gut microbiome in Crohn's disease can help target new and innovative treatment strategies. AIMS This review summarises the relationship between bile acids and the microbiome in Crohn's disease and discusses potential novel therapeutic options. METHODS We performed a literature review on bile acid signalling, its effect on the gut microbiome, and therapeutic applications in Crohn's disease. RESULTS Current research suggests that there is a strong interplay between the dysregulated microbiota, bile acid metabolism, and the mucosal immune system that can result in a changed immunological function, triggering the inflammatory response in Crohn's disease. Recent studies have demonstrated an association with altering the enterohepatic circulation and activating the farnesoid X receptor signalling pathway with the use of probiotics and faecal microbial transplantation, respectively. Bile acid sequestrants have been shown to have anti-inflammatory, cytoprotective, and anti-apoptotic properties with the potential to alter the intestinal microbial composition, suggesting a possible role in inducing and maintaining Crohn's disease. CONCLUSIONS Active Crohn's disease has been correlated with changes in bacterial concentrations, which may be associated with changes in bile acid modification. Further research should focus on targeting these areas for future therapeutic options.
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13
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Anderson KM, Gayer CP. The Pathophysiology of Farnesoid X Receptor (FXR) in the GI Tract: Inflammation, Barrier Function and Innate Immunity. Cells 2021; 10:cells10113206. [PMID: 34831429 PMCID: PMC8624027 DOI: 10.3390/cells10113206] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Accepted: 11/12/2021] [Indexed: 12/12/2022] Open
Abstract
The Farnesoid-X Receptor, FXR, is a nuclear bile acid receptor. Its originally described function is in bile acid synthesis and regulation within the liver. More recently, however, FXR has been increasingly appreciated for its breadth of function and expression across multiple organ systems, including the intestine. While FXR’s role within the liver continues to be investigated, increasing literature indicates that FXR has important roles in responding to inflammation, maintaining intestinal epithelial barrier function, and regulating immunity within the gastrointestinal (GI) tract. Given the complicated and multi-factorial nature of intestinal barrier dysfunction, it is not surprising that FXR’s role appears equally complicated and not without conflicting data in different model systems. Recent work has suggested translational applications of FXR modulation in GI pathology; however, a better understanding of FXR physiology is necessary for these treatments to gain widespread use in human disease. This review aims to discuss current scientific work on the role of FXR within the GI tract, specifically in its role in intestinal inflammation, barrier function, and immune response, while also exploring areas of controversy.
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Affiliation(s)
- Kemp M. Anderson
- Department of Surgery, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA;
- Division of Pediatric Surgery, Childrens Hospital Los Angeles, Los Angeles, CA 90027, USA
| | - Christopher P. Gayer
- Department of Surgery, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA;
- Division of Pediatric Surgery, Childrens Hospital Los Angeles, Los Angeles, CA 90027, USA
- Correspondence: ; Tel.: +1-323-361-4974
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14
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Brizuela M, Castro J, Harrington AM, Brierley SM. Pruritogenic mechanisms and gut sensation: putting the "irritant" into irritable bowel syndrome. Am J Physiol Gastrointest Liver Physiol 2021; 320:G1131-G1141. [PMID: 33949199 DOI: 10.1152/ajpgi.00331.2020] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Chronic abdominal pain is a common clinical condition experienced by patients with irritable bowel syndrome (IBS). A general lack of suitable treatment options for the management of visceral pain is the major contributing factor to the debilitating nature of the disease. Understanding the underlying causes of chronic visceral pain is pivotal to identifying new effective therapies for IBS. This review provides the current evidence, demonstrating that mediators and receptors that induce itch in the skin also act as "gut irritants" in the gastrointestinal tract. Activation of these receptors triggers specific changes in the neuronal excitability of sensory pathways responsible for the transmission of nociceptive information from the periphery to the central nervous system leading to visceral hypersensitivity and visceral pain. Accumulating evidence points to significant roles of irritant mediators and their receptors in visceral hypersensitivity and thus constitutes potential targets for the development of more effective therapeutic options for IBS.
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Affiliation(s)
- Mariana Brizuela
- Visceral Pain Research Group, College of Medicine and Public Health, Flinders Health and Medical Research Institute, Flinders University, Adelaide, South Australia, Australia.,Hopwood Centre for Neurobiology, Lifelong Health Theme, South Australian Health and Medical Research Institute, Adelaide, South Australia, Australia
| | - Joel Castro
- Visceral Pain Research Group, College of Medicine and Public Health, Flinders Health and Medical Research Institute, Flinders University, Adelaide, South Australia, Australia.,Hopwood Centre for Neurobiology, Lifelong Health Theme, South Australian Health and Medical Research Institute, Adelaide, South Australia, Australia
| | - Andrea M Harrington
- Visceral Pain Research Group, College of Medicine and Public Health, Flinders Health and Medical Research Institute, Flinders University, Adelaide, South Australia, Australia.,Hopwood Centre for Neurobiology, Lifelong Health Theme, South Australian Health and Medical Research Institute, Adelaide, South Australia, Australia
| | - Stuart M Brierley
- Visceral Pain Research Group, College of Medicine and Public Health, Flinders Health and Medical Research Institute, Flinders University, Adelaide, South Australia, Australia.,Hopwood Centre for Neurobiology, Lifelong Health Theme, South Australian Health and Medical Research Institute, Adelaide, South Australia, Australia.,Discipline of Medicine, University of Adelaide, Adelaide, South Australia, Australia
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15
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Sun R, Xu C, Feng B, Gao X, Liu Z. Critical roles of bile acids in regulating intestinal mucosal immune responses. Therap Adv Gastroenterol 2021; 14:17562848211018098. [PMID: 34104213 PMCID: PMC8165529 DOI: 10.1177/17562848211018098] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2020] [Accepted: 04/27/2021] [Indexed: 02/04/2023] Open
Abstract
Bile acids are a class of cholesterol derivatives that have been known for a long time for their critical roles in facilitating the digestion and absorption of lipid from the daily diet. The transformation of primary bile acids produced by the liver to secondary bile acids appears under the action of microbiota in the intestine, greatly expanding the molecular diversity of the intestinal environment. With the discovery of several new receptors of bile acids and signaling pathways, bile acids are considered as a family of important metabolites that play pleiotropic roles in regulating many aspects of human overall health, especially in the maintenance of the microbiota homeostasis and the balance of the mucosal immune system in the intestine. Accordingly, disruption of the process involved in the metabolism or circulation of bile acids is implicated in many disorders that mainly affect the intestine, such as inflammatory bowel disease and colon cancer. In this review, we discuss the different metabolism profiles in diseases associated with the intestinal mucosa and the diverse roles of bile acids in regulating the intestinal immune system. Furthermore, we also summarize recent advances in the field of new drugs that target bile acid signaling and highlight the importance of bile acids as a new target for disease intervention.
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Affiliation(s)
| | | | | | - Xiang Gao
- Department of Gastroenterology, The Shanghai Tenth People’s Hospital of Tongji University, Shanghai, China
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16
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Bile Acids Activated Receptors in Inflammatory Bowel Disease. Cells 2021; 10:cells10061281. [PMID: 34064187 PMCID: PMC8224328 DOI: 10.3390/cells10061281] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 05/14/2021] [Accepted: 05/20/2021] [Indexed: 12/18/2022] Open
Abstract
Once known exclusively for their role in nutrients absorption, bile acids have emerged as signaling molecules, generated from cholesterol breakdown, acting on several immune cells by activating a variety of receptors including the G protein-coupled bile acid receptor 1 (GPABR1 or TGR5), the Farnesoid-X-receptor (FXR) and, as recently discovered, the retinoid-related orphan receptors (ROR)γt. GPBAR1, FXR, and RORγt are highly expressed in cells of the innate and adaptive immune system (i.e., dendritic cells (DCs), macrophages, innate lymphoid 3 cells (ILC3s), and T helper 17 (Th17) lymphocytes) and plays an important role in regulating intestinal and liver immunity, highlighting a role for various bile acid species in regulating immune responses to intestinal microbial antigens. While primary bile acids are generated from the cholesterol breakdown secondary bile acids, the GPBAR1 ligands, and oxo-bile acids derivatives, the RORγt ligands, are generated by the intestinal microbiota, highlighting the potential of these bile acids in mediating the chemical communication between the intestinal microbiota and the host. Changes in intestinal microbiota, dysbiosis, alter the composition of the bile acid pool, promoting the activation of the immune system and development of chronic inflammation. In this review, we focus on the molecular mechanisms by which an altered bile acid signaling promotes intestinal inflammation.
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17
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Ryan JJ, Patno NM. Short-Term Tolerability, Safety, and Gut Microbial Composition Responses to a Multi-Strain Probiotic Supplement: An Open-Label Study in Healthy Adults. Integr Med (Encinitas) 2021; 20:24-34. [PMID: 34393673 PMCID: PMC8352413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
BACKGROUND Probiotics are among the most commonly used dietary supplements and evidence of their efficacy is increasing. Despite the long historical use of probiotics, some experts suggest that additional research is necessary to understand their potential risks. OBJECTIVES Main aims of this study were to assess short-term tolerability and safety of a new, high colony-forming unit count, multi-strain probiotic supplement. Exploratory objectives included evaluating effects on gut microbial composition. METHODS Ten healthy adults were enrolled in a single-arm, open-label study. Over a 10-day period, participants consumed a once daily probiotic capsule (2.1 x 1011 CFU) containing Lactobacillus acidophilus NCFM, Lactobacillus paracasei Lpc-37, Lactobacillus plantarum Lp-115, Lactobacillus rhamnosus GG, Lactobacillus rhamnosus HN001, Bifidobacterium lactis Bi-07, Bifidobacterium lactis Bl-04, and Bifidobacterium lactis HN019. The primary measure of tolerability pertained to whether or not participants completed the study. Secondary safety measures included clinical biomarkers from a routine metabolic panel and a complete blood count. Exploratory measures included stool microbiota counts. RESULTS All participants completed the study and there were no serious adverse events. All documented adverse events were prompted by the investigators and the most commonly reported symptoms were gastrointestinal. There was a single instance of a biomarker abnormality in one individual. Overall, decreases in total bilirubin and aspartate aminotransferase, and increases in stool levels of Lactobacillus species, Faecalibacterium prausnitzii, and Akkermansia muciniphila (P < .05) were observed over the course of the study. CONCLUSIONS The findings of this study suggest the multi-strain probiotic supplement was well-tolerated and most likely safe. Changes in liver function measures suggest the probiotics could potentially impact liver health. Stool microbiota changes suggest the probiotic could potentially impact gut health by affecting levels of intestinal microbiota that have been described as bioindicators of health and potential keystone species. However, additional research is necessary to follow up on the exploratory findings of this preliminary work.
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Affiliation(s)
- Jennifer Joan Ryan
- investigator and adjunct faculty at the Helfgott Research Institute, National University of Natural Medicine, Portland, OR, USA
| | - Noelle M. Patno
- Digestive Health Therapeutic Platform Lead at Metagenics, Inc in Aliso Viejo, CA, USA
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18
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Miyazaki T, Shirakami Y, Mizutani T, Maruta A, Ideta T, Kubota M, Sakai H, Ibuka T, Genovese S, Fiorito S, Taddeo VA, Epifano F, Tanaka T, Shimizu M. Novel FXR agonist nelumal A suppresses colitis and inflammation-related colorectal carcinogenesis. Sci Rep 2021; 11:492. [PMID: 33436792 PMCID: PMC7804240 DOI: 10.1038/s41598-020-79916-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Accepted: 12/15/2020] [Indexed: 12/13/2022] Open
Abstract
FXR is a member of the nuclear receptor superfamily and bile acids are endogenous ligands of FXR. FXR activation has recently been reported to inhibit intestinal inflammation and tumour development. This study aimed to investigate whether the novel FXR agonist nelumal A, the active compound of the plant Ligularia nelumbifolia, can prevent colitis and colorectal carcinogenesis. In a mouse colitis model, dextran sodium sulfate-induced colonic mucosal ulcer and the inflammation grade in the colon significantly reduced in mice fed diets containing nelumal A. In an azoxymethane/dextran sodium sulfate-induced mouse inflammation-related colorectal carcinogenesis model, the mice showed decreased incidence of colonic mucosal ulcers and adenocarcinomas in nelumal A-treated group. Administration of nelumal A also induced tight junctions, antioxidant enzymes, and FXR target gene expression in the intestine, while it decreased the gene expression of bile acid synthesis in the liver. These findings suggest that nelumal A effectively attenuates colonic inflammation and suppresses colitis-related carcinogenesis, presumably through reduction of bile acid synthesis and oxidative damage. This agent may be potentially useful for treatment of inflammatory bowel diseases as well as their related colorectal cancer chemoprevention.
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Affiliation(s)
- Tsuneyuki Miyazaki
- Department of Gastroenterology, Gifu University Graduate School of Medicine, 1-1 Yanagido, Gifu, 501-1194, Japan
| | - Yohei Shirakami
- Department of Gastroenterology, Gifu University Graduate School of Medicine, 1-1 Yanagido, Gifu, 501-1194, Japan.
| | - Taku Mizutani
- Department of Gastroenterology, Gifu University Graduate School of Medicine, 1-1 Yanagido, Gifu, 501-1194, Japan
| | - Akinori Maruta
- Department of Gastroenterology, Gifu University Graduate School of Medicine, 1-1 Yanagido, Gifu, 501-1194, Japan
| | - Takayasu Ideta
- Department of Gastroenterology, Gifu University Graduate School of Medicine, 1-1 Yanagido, Gifu, 501-1194, Japan
| | - Masaya Kubota
- Department of Gastroenterology, Gifu University Graduate School of Medicine, 1-1 Yanagido, Gifu, 501-1194, Japan
| | - Hiroyasu Sakai
- Department of Gastroenterology, Gifu University Graduate School of Medicine, 1-1 Yanagido, Gifu, 501-1194, Japan
| | - Takashi Ibuka
- Department of Gastroenterology, Gifu University Graduate School of Medicine, 1-1 Yanagido, Gifu, 501-1194, Japan
| | - Salvatore Genovese
- Department of Pharmacy, D'Annunzio University of Chieti-Pescara, 66100, Chieti Scalo, Italy
| | - Serena Fiorito
- Department of Pharmacy, D'Annunzio University of Chieti-Pescara, 66100, Chieti Scalo, Italy
| | - Vito Alessandro Taddeo
- Department of Pharmacy, D'Annunzio University of Chieti-Pescara, 66100, Chieti Scalo, Italy
| | - Francesco Epifano
- Department of Pharmacy, D'Annunzio University of Chieti-Pescara, 66100, Chieti Scalo, Italy
| | - Takuji Tanaka
- Department of Pathological Diagnosis, Gifu Municipal Hospital, Gifu, 500-8513, Japan
| | - Masahito Shimizu
- Department of Gastroenterology, Gifu University Graduate School of Medicine, 1-1 Yanagido, Gifu, 501-1194, Japan
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19
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Keane JM, Joyce SA, Gahan CGM, Hyland NP, Houston A. Microbial Metabolites as Molecular Mediators of Host-Microbe Symbiosis in Colorectal Cancer. Results Probl Cell Differ 2020; 69:581-603. [PMID: 33263888 DOI: 10.1007/978-3-030-51849-3_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
The symbiosis between the gut microbiota and the host has been identified as an integral part of normal human physiology and physiological development. Research in germ-free or gnotobiotic animals has demonstrated the importance of this symbiosis in immune, vascular, hepatic, respiratory and metabolic systems. Disruption of the microbiota can also contribute to disease, and the microbiota has been implicated in numerous intestinal and extra-intestinal pathologies including colorectal cancer. Interactions between host and microbiota can occur either directly or indirectly, via microbial-derived metabolites. In this chapter, we focus on two major products of microbial metabolism, short-chain fatty acids and bile acids, and their role in colorectal cancer. Short-chain fatty acids are the products of microbial fermentation of complex carbohydrates and confer protection against cancer risk, while bile acids are compounds which are endogenous to the host, but undergo microbial modification in the large intestine leading to alterations in their bioactivity. Lastly, we discuss the ability of microbial modulation to mediate cancer risk and the potential to harness this ability as a prophylactic or therapeutic treatment in colorectal cancer.
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Affiliation(s)
- J M Keane
- APC Microbiome Ireland, University College Cork, Cork, Ireland
- School of Microbiology, University College Cork, Cork, Ireland
- Department of Medicine, University College Cork, Cork, Ireland
| | - S A Joyce
- APC Microbiome Ireland, University College Cork, Cork, Ireland
- School of Biochemistry and Cell Biology, University College Cork, Cork, Ireland
| | - C G M Gahan
- APC Microbiome Ireland, University College Cork, Cork, Ireland
- School of Microbiology, University College Cork, Cork, Ireland
- School of Pharmacy, University College Cork, Cork, Ireland
| | - N P Hyland
- APC Microbiome Ireland, University College Cork, Cork, Ireland.
- Department of Physiology, University College Cork, Cork, Ireland.
| | - A Houston
- APC Microbiome Ireland, University College Cork, Cork, Ireland
- Department of Medicine, University College Cork, Cork, Ireland
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20
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Zhao L, Lou H, Peng Y, Chen S, Fan L, Li X. Elevated levels of circulating short-chain fatty acids and bile acids in type 2 diabetes are linked to gut barrier disruption and disordered gut microbiota. Diabetes Res Clin Pract 2020; 169:108418. [PMID: 32891692 DOI: 10.1016/j.diabres.2020.108418] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 08/11/2020] [Accepted: 09/01/2020] [Indexed: 02/07/2023]
Abstract
AIMS Studies have shown that destruction of the intestinal barrier in type 2 diabetes (T2D) leads to increased absorption of macromolecules from intestinal. We previously exhibited that short-chain fatty acids (SCFAs) and bile acids (BAs) were significantly decreased in faeces of T2D patients. In the current study, we extended these findings by focusing on the interactions between intestinal barrier and clinical characteristics, gut microbiota, SCFAs and BAs. METHODS 65 T2D patients and 35 healthy controls were recruited, targeted metabolomics was used to evaluate the SCFAs and BAs in their serum samples. The serum zonula occludens-1 (ZO-1) was measured by ELISA to evaluate intestinal barrier. RESULTS Compared with the healthy controls, the serum concentrations of total SCFA, acetate and propionate were significantly increased in the T2D patients, and certain BAs were also significantly increased. In addition, the higher levels of serum ZO-1 suggested a "leaky gut" in T2D patients. The ZO-1 was comprehensively correlated with clinical characteristics, gut microbiota, SCFAs and BAs. CONCLUSION SCFAs and BAs were excessively absorbed from the intestinal through the leaky gut, leading to higher levels of circulating SCFAs and BAs in T2D patients, and that the leaky gut might be caused by the disordered gut microbiota.
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Affiliation(s)
- Lijuan Zhao
- School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Hongxiang Lou
- Key Laboratory of Chemical Biology, School of Pharmaceutical Sciences, Shandong University, 44 Wenhuaxi Road, Jinan 250012, China
| | - Ying Peng
- School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Shihong Chen
- Department of Endocrinology, Second Hospital of Shandong University, 247 Beiyuan Road, Jinan 250033, China
| | - Li Fan
- School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Xiaobo Li
- School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China.
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21
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Bradley R, Langley BO, Ryan JJ, Phipps J, Hanes DA, Stack E, Jansson JK, Metz TO, Stevens JF. Xanthohumol microbiome and signature in healthy adults (the XMaS trial): a phase I triple-masked, placebo-controlled clinical trial. Trials 2020; 21:835. [PMID: 33028396 PMCID: PMC7542976 DOI: 10.1186/s13063-020-04769-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 09/24/2020] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Natural products may provide a source for the discovery and development of adjunctive pharmacological interventions to modulate the inflammatory pathways contributing to chronic disease. Xanthohumol, a flavonoid from the hops plant (Humulus lupulus), has antioxidant and anti-inflammatory properties and may act as a prebiotic to the intestinal microbiota. Xanthohumol is not currently approved as a drug by the US Food and Drug Administration (FDA), but is available as a dietary supplement and ingredient in medical foods. To formally test the safety of xanthohumol, a phase I clinical trial ("XMaS") was designed and approved under an Investigational New Drug application to the US FDA. The main objective is to examine the clinical safety and subjective tolerability of xanthohumol in healthy adults compared to placebo. Additional aims are to monitor biomarkers related to inflammation, gut permeability, bile acid metabolism, routes, and in vivo products of xanthohumol metabolism, and to evaluate xanthohumol's impact on gut microbial composition. METHODS The safety and tolerability of xanthohumol in healthy adults will be evaluated in a triple-masked, randomized, placebo-controlled trial. Participants will be randomized to either 24 mg/day of xanthohumol or placebo for 8 weeks. Blood cell counts, hepatic and renal function tests, electrolytes, and self-reported health-related quality of life measures will be collected every 2 weeks. Participants will be queried for adverse events throughout the trial. Xanthohumol metabolites in blood, urine, and stool will be measured. Biomarkers to be evaluated include plasma tumor necrosis factor-alpha, various interleukins, soluble CD14, lipopolysaccharide-binding protein, fecal calprotectin, and bile acids to assess impact on inflammatory and gut permeability-related mechanisms in vivo. Stool samples will be analyzed to determine effects on the gut microbiome. DISCUSSION This phase I clinical trial of xanthohumol will assess safety and tolerability in healthy adults, collect extensive biomarker data for assessment of potential mechanism(s), and provide comparison data necessary for future phase II trials in chronic disease(s). The design and robustness of the planned safety and mechanistic evaluations planned provide a model for drug discovery pursuits from natural products. TRIAL REGISTRATION ClinicalTrials.gov NCT03735420 . Registered on November 8, 2018.
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Affiliation(s)
- Ryan Bradley
- National University of Natural Medicine, Portland, USA.
| | | | | | - John Phipps
- National University of Natural Medicine, Portland, USA
| | | | - Emily Stack
- National University of Natural Medicine, Portland, USA
| | | | - Thomas O Metz
- Pacific Northwest National Laboratory, Richland, USA
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22
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Li T, Chiang JYL. Bile acid-based therapies for non-alcoholic steatohepatitis and alcoholic liver disease. Hepatobiliary Surg Nutr 2020; 9:152-169. [PMID: 32355674 PMCID: PMC7188552 DOI: 10.21037/hbsn.2019.09.03] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Accepted: 08/26/2019] [Indexed: 12/12/2022]
Abstract
Bile acids are synthesized from cholesterol only in hepatocytes. Bile acids circulating in the enterohepatic system act as physiological detergent molecules to help solubilize biliary cholesterol and emulsify dietary lipids and fat-soluble vitamins in small intestine. Bile acids are signaling molecules that activate nuclear receptor farnesoid X receptor (FXR) and cell surface G protein-coupled receptor TGR5. FXR critically regulates bile acid homeostasis by mediating bile acid feedback inhibition of hepatic bile acid synthesis. In addition, bile acid-activated cellular signaling pathways regulate metabolic homeostasis, immunity, and cell proliferation in various metabolically active organs. In the small and large intestine, gut bacterial enzymes modify primary bile acids to generate secondary bile acids to help shape the bile acid pool composition and subsequent biological effects. In turn, bile acids exhibit anti-microbial properties and modulate gut microbiota to influence host metabolism and immunity. Currently, bile acid-based therapies including systemic and intestine-restricted FXR agonists, TGR5 agonists, fibroblast growth factor 19 analogue, intestine FXR antagonists, and intestine apical sodium-bile acid transporter (ASBT) inhibitors have been developed as promising treatments for non-alcoholic steatohepatitis (NASH). These pharmacological agents improved metabolic and inflammatory disorders via distinct mechanisms of action that are subjects of extensive research interest. More recently, human and experimental alcoholic liver disease (ALD) has been associated with disrupted bile acid homeostasis. In additional, new findings showed that targeting bile acid metabolism and signaling may be promising therapeutic approaches for treating ALD.
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Affiliation(s)
- Tiangang Li
- Department of Pharmacology, Toxicology and Therapeutics, University of Kansas Medical Center, Kansas City, KS, USA
| | - John Y. L. Chiang
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, Rootstown, OH, USA
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23
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Effect of fosfomycin, Cynara scolymus extract, deoxynivalenol and their combinations on intestinal health of weaned piglets. ACTA ACUST UNITED AC 2020; 5:386-395. [PMID: 31890916 PMCID: PMC6920400 DOI: 10.1016/j.aninu.2019.08.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Revised: 07/19/2019] [Accepted: 08/02/2019] [Indexed: 12/20/2022]
Abstract
Weaning is a challenging stage of pig farming. Animals undergo environmental, social and dietary changes leading to weaning stress syndrome. In order to compensate for the detrimental effects of weaning stress, antibiotics and natural extracts are used as feed additives, sometimes without fully understanding the interactions between them or even with low concentrations of mycotoxins that are frequently present in feed. The aim of this study was to evaluate the effect of fosfomycin (FOS), Cynara scolymus extract (CSE), deoxynivalenol (DON) and their combined administration on intestinal health of weaned piglets. The experiment was designed as a 2 × 2 × 2 factorial arrangement with 3 factors (FOS, CSE and DON treatments), 2 levels each (presence and absence) and 3 repeats. Weaned piglets (n = 24) were randomly divided in groups to receive the different treatments, namely DON administered in diet (50 μg/kg BW), FOS administered into the drinking water (30 mg/kg BW), CSE administered in diet (15 mg/kg BW) and all their combinations. After 15 d, the animals were euthanized and gastrointestinal tract samples were immediately taken to evaluate gastrointestinal pH, Enterobacteriaceae to lactic acid bacteria (E:L) ratio, volatile fatty acid (VFA) concentrations, disaccharidase (lactase, sucrase and maltase) activity, histology (intestinal absorptive area [IAA] and goblet cells count) and mucus ability to adhere pathogenic Escherichia coli. From our results, FOS and CSE treatments, individually or combined, produced a lower E:L ratio, an enhanced production of butyrate, increased disaccharidase activity (particularly maltase), and a greater IAA and goblet cells count along with an increase in pathogenic bacteria adherence to intestinal mucus. Deoxynivalenol did not show interactions with the other factors and its administration produced decreases on VFA, disaccharidase activity and goblet cells count. In conclusion, weaning piglets receiving diets containing FOS, CSE or both exhibited evident beneficial intestinal effects compared to animals receiving diets free from these compounds. On the contrary, the presence of DON at sub-toxic concentrations produced detrimental effects on intestinal health. The knowledge of the physiological and pathological gut changes produced by these compounds contributes to understand their potential productive consequences.
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Song M, Ye J, Zhang F, Su H, Yang X, He H, Liu F, Zhu X, Wang L, Gao P, Shu G, Jiang Q, Wang S. Chenodeoxycholic Acid (CDCA) Protects against the Lipopolysaccharide-Induced Impairment of the Intestinal Epithelial Barrier Function via the FXR-MLCK Pathway. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:8868-8874. [PMID: 31319027 DOI: 10.1021/acs.jafc.9b03173] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Chenodeoxycholic acid (CDCA), a primary bile acid, has been demonstrated to play important roles as a signaling molecule in various physiology functions. However, the role of CDCA in regulating intestinal barrier function remains largely unknown. This study aimed to investigate the effects of CDCA on the lipopolysaccharide (LPS)-impaired intestinal epithelial barrier function and explore the underlying mechanisms. In IPEC-J2 cells, CDCA reversed the LPS-induced increase in transepithelial electrical resistance and decrease in tight junction protein expression. In addition, we found that farnesoid X receptor (FXR) but not Takeda G-protein receptor 5 was responsible for the CDCA-improved epithelial barrier function impaired by LPS. Furthermore, CDCA blocked LPS-induced activation of the myosin light chain kinase (MLCK) pathway in a FXR-dependent manner and elicited similar effects to MLCK inhibition. In mice, CDCA supplementation restored LPS-induced elevation of intestinal permeability and MLCK expression and reduction of tight junction protein expression, thus alleviating LPS-induced intestinal barrier impairment. In conclusion, CDCA protected against the LPS-induced impairment of the intestinal epithelial barrier function via the FXR-MLCK pathway.
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25
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Nuclear Receptors in the Pathogenesis and Management of Inflammatory Bowel Disease. Mediators Inflamm 2019; 2019:2624941. [PMID: 30804707 PMCID: PMC6360586 DOI: 10.1155/2019/2624941] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 12/01/2018] [Accepted: 12/23/2018] [Indexed: 12/12/2022] Open
Abstract
Nuclear receptors (NRs) are ligand-dependent transcription factors that regulate the transcription of target genes. Previous epidemiological and genetic studies have documented the association of NRs with the risk of inflammatory bowel disease (IBD). Although the mechanisms of action of NRs in IBD have not been fully established, accumulating evidence has demonstrated that NRs play complicated roles in regulating intestinal immunity, mucosal barriers, and intestinal flora. As one of the first-line medications for the treatment of IBD, 5-aminosalicylic acid (5-ASA) activates peroxisome proliferator-activated receptor gamma (PPARγ) to attenuate colitis. The protective roles of rifaximin and rifampicin partly depend on promoting pregnane X receptor (PXR) expression. The aims of this review are to discuss the roles of several important NRs, such as PPARγ, PXR, vitamin D receptor (VDR), farnesoid X receptor (FXR), and RAR-related orphan receptor gammat (RORγt), in the pathogenesis of IBD and management strategies based on targeting these receptors.
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26
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Hegyi P, Maléth J, Walters JR, Hofmann AF, Keely SJ. Guts and Gall: Bile Acids in Regulation of Intestinal Epithelial Function in Health and Disease. Physiol Rev 2019; 98:1983-2023. [PMID: 30067158 DOI: 10.1152/physrev.00054.2017] [Citation(s) in RCA: 159] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Epithelial cells line the entire surface of the gastrointestinal tract and its accessory organs where they primarily function in transporting digestive enzymes, nutrients, electrolytes, and fluid to and from the luminal contents. At the same time, epithelial cells are responsible for forming a physical and biochemical barrier that prevents the entry into the body of harmful agents, such as bacteria and their toxins. Dysregulation of epithelial transport and barrier function is associated with the pathogenesis of a number of conditions throughout the intestine, such as inflammatory bowel disease, chronic diarrhea, pancreatitis, reflux esophagitis, and cancer. Driven by discovery of specific receptors on intestinal epithelial cells, new insights into mechanisms that control their synthesis and enterohepatic circulation, and a growing appreciation of their roles as bioactive bacterial metabolites, bile acids are currently receiving a great deal of interest as critical regulators of epithelial function in health and disease. This review aims to summarize recent advances in this field and to highlight how bile acids are now emerging as exciting new targets for disease intervention.
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Affiliation(s)
- Peter Hegyi
- Momentum Translational Gastroenterology Research Group, Hungarian Academy of Sciences-University of Szeged , Szeged , Hungary ; Institute for Translational Medicine, Medical School, University of Pécs , Pécs , Hungary ; Momentum Epithelial Cell Signalling and Secretion Research Group and First Department of Medicine, University of Szeged , Szeged , Hungary ; Division of Digestive Diseases, Department of Gastroenterology, Hammersmith Hospital, Imperial College London , London , United Kingdom ; Division of Gastroenterology, Department of Medicine, University of California, San Diego, La Jolla, California ; and Department of Molecular Medicine, Royal College of Surgeons in Ireland, Education and Research Centre, Beaumont Hospital , Dublin , Ireland
| | - Joszef Maléth
- Momentum Translational Gastroenterology Research Group, Hungarian Academy of Sciences-University of Szeged , Szeged , Hungary ; Institute for Translational Medicine, Medical School, University of Pécs , Pécs , Hungary ; Momentum Epithelial Cell Signalling and Secretion Research Group and First Department of Medicine, University of Szeged , Szeged , Hungary ; Division of Digestive Diseases, Department of Gastroenterology, Hammersmith Hospital, Imperial College London , London , United Kingdom ; Division of Gastroenterology, Department of Medicine, University of California, San Diego, La Jolla, California ; and Department of Molecular Medicine, Royal College of Surgeons in Ireland, Education and Research Centre, Beaumont Hospital , Dublin , Ireland
| | - Julian R Walters
- Momentum Translational Gastroenterology Research Group, Hungarian Academy of Sciences-University of Szeged , Szeged , Hungary ; Institute for Translational Medicine, Medical School, University of Pécs , Pécs , Hungary ; Momentum Epithelial Cell Signalling and Secretion Research Group and First Department of Medicine, University of Szeged , Szeged , Hungary ; Division of Digestive Diseases, Department of Gastroenterology, Hammersmith Hospital, Imperial College London , London , United Kingdom ; Division of Gastroenterology, Department of Medicine, University of California, San Diego, La Jolla, California ; and Department of Molecular Medicine, Royal College of Surgeons in Ireland, Education and Research Centre, Beaumont Hospital , Dublin , Ireland
| | - Alan F Hofmann
- Momentum Translational Gastroenterology Research Group, Hungarian Academy of Sciences-University of Szeged , Szeged , Hungary ; Institute for Translational Medicine, Medical School, University of Pécs , Pécs , Hungary ; Momentum Epithelial Cell Signalling and Secretion Research Group and First Department of Medicine, University of Szeged , Szeged , Hungary ; Division of Digestive Diseases, Department of Gastroenterology, Hammersmith Hospital, Imperial College London , London , United Kingdom ; Division of Gastroenterology, Department of Medicine, University of California, San Diego, La Jolla, California ; and Department of Molecular Medicine, Royal College of Surgeons in Ireland, Education and Research Centre, Beaumont Hospital , Dublin , Ireland
| | - Stephen J Keely
- Momentum Translational Gastroenterology Research Group, Hungarian Academy of Sciences-University of Szeged , Szeged , Hungary ; Institute for Translational Medicine, Medical School, University of Pécs , Pécs , Hungary ; Momentum Epithelial Cell Signalling and Secretion Research Group and First Department of Medicine, University of Szeged , Szeged , Hungary ; Division of Digestive Diseases, Department of Gastroenterology, Hammersmith Hospital, Imperial College London , London , United Kingdom ; Division of Gastroenterology, Department of Medicine, University of California, San Diego, La Jolla, California ; and Department of Molecular Medicine, Royal College of Surgeons in Ireland, Education and Research Centre, Beaumont Hospital , Dublin , Ireland
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27
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Swain J, Mishra J, Ghosh G, Mishra AK. Quantification of micropolarity and microviscosity of aggregation and salt-induced gelation of sodium deoxycholate (NaDC) using Nile red fluorescence. Photochem Photobiol Sci 2019; 18:2773-2781. [DOI: 10.1039/c9pp00293f] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Nile red fluorescence properties can be used for the estimation of micropolarity and microviscosity of the gel medium.
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Affiliation(s)
- Jitendriya Swain
- Department of Chemistry
- Indian Institute of Technology Madras
- Chennai 600 036
- India
| | - Jhili Mishra
- Department of Chemistry
- Indian Institute of Technology Madras
- Chennai 600 036
- India
| | - Goutam Ghosh
- Department of Chemistry
- Indian Institute of Technology Madras
- Chennai 600 036
- India
| | - Ashok Kumar Mishra
- Department of Chemistry
- Indian Institute of Technology Madras
- Chennai 600 036
- India
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28
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Potential Applications of Gliclazide in Treating Type 1 Diabetes Mellitus: Formulation with Bile Acids and Probiotics. Eur J Drug Metab Pharmacokinet 2018; 43:269-280. [PMID: 29039071 DOI: 10.1007/s13318-017-0441-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A major advancement in therapy of type 1 diabetes mellitus (T1DM) is the discovery of new treatment which avoids and even replaces the absolute requirement for injected insulin. The need for multiple drug therapy of comorbidities associated with T1DM increases demand for developing novel therapeutic alternatives with new mechanisms of actions. Compared to other sulphonylurea drugs used in the treatment of type 2 diabetes mellitus, gliclazide exhibits a pleiotropic action outside pancreatic β cells, the so-called extrapancreatic effects, such as antiinflammatory and cellular protective effects, which might be beneficial in the treatment of T1DM. Results from in vivo experiments confirmed the positive effects of gliclazide in T1DM that are even more pronounced when combined with other hypoglycaemic agents such as probiotics and bile acids. Even though the exact mechanism of interaction at the molecular level is still unknown, there is a clear synergistic effect between gliclazide, bile acids and probiotics illustrated by the reduction of blood glucose levels and improvement of diabetic complications. Therefore, the manipulation of bile acid pool and intestinal microbiota composition in combination with old drug gliclazide could be a novel therapeutic approach for patients with T1DM.
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29
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Bile acids and FXR in functional gastrointestinal disorders. Dig Liver Dis 2018; 50:795-803. [PMID: 29908754 DOI: 10.1016/j.dld.2018.05.016] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 05/15/2018] [Accepted: 05/22/2018] [Indexed: 12/11/2022]
Abstract
Functional gastrointestinal disorders (FGIDs), such as irritable bowel syndrome (IBS) and chronic constipation (CC), are commonly diagnosed conditions in clinical practice which create a substantial global burden. Since the farnesoid X receptor (FXR) and bile acids (BAs) are responsible for maintaining homeostasis in the GI tract, any disturbances in the expression of FXR or the composition of BAs may contribute to the development of the GI symptoms. Alterations in the mechanism of action of FXR directly affect the BAs pool and account for increased intestinal permeability and changes in abundance and diversity of gut microbiota leading to intestinal dysmotility. Current review focuses on the correlation between the FXR, BAs and the composition of gut microbiota and its influence on the occurrence of GI symptoms in FGIDs.
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30
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Burg D, Schofield JPR, Brandsma J, Staykova D, Folisi C, Bansal A, Nicholas B, Xian Y, Rowe A, Corfield J, Wilson S, Ward J, Lutter R, Fleming L, Shaw DE, Bakke PS, Caruso M, Dahlen SE, Fowler SJ, Hashimoto S, Horváth I, Howarth P, Krug N, Montuschi P, Sanak M, Sandström T, Singer F, Sun K, Pandis I, Auffray C, Sousa AR, Adcock IM, Chung KF, Sterk PJ, Djukanović R, Skipp PJ, The U-Biopred Study Group. Large-Scale Label-Free Quantitative Mapping of the Sputum Proteome. J Proteome Res 2018; 17:2072-2091. [PMID: 29737851 DOI: 10.1021/acs.jproteome.8b00018] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Analysis of induced sputum supernatant is a minimally invasive approach to study the epithelial lining fluid and, thereby, provide insight into normal lung biology and the pathobiology of lung diseases. We present here a novel proteomics approach to sputum analysis developed within the U-BIOPRED (unbiased biomarkers predictive of respiratory disease outcomes) international project. We present practical and analytical techniques to optimize the detection of robust biomarkers in proteomic studies. The normal sputum proteome was derived using data-independent HDMSE applied to 40 healthy nonsmoking participants, which provides an essential baseline from which to compare modulation of protein expression in respiratory diseases. The "core" sputum proteome (proteins detected in ≥40% of participants) was composed of 284 proteins, and the extended proteome (proteins detected in ≥3 participants) contained 1666 proteins. Quality control procedures were developed to optimize the accuracy and consistency of measurement of sputum proteins and analyze the distribution of sputum proteins in the healthy population. The analysis showed that quantitation of proteins by HDMSE is influenced by several factors, with some proteins being measured in all participants' samples and with low measurement variance between samples from the same patient. The measurement of some proteins is highly variable between repeat analyses, susceptible to sample processing effects, or difficult to accurately quantify by mass spectrometry. Other proteins show high interindividual variance. We also highlight that the sputum proteome of healthy individuals is related to sputum neutrophil levels, but not gender or allergic sensitization. We illustrate the importance of design and interpretation of disease biomarker studies considering such protein population and technical measurement variance.
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Affiliation(s)
- Dominic Burg
- Centre for Proteomic Research, Biological Sciences , University of Southampton , Southampton SO17 1BJ , U.K.,NIHR Southampton Biomedical Research Centre, Clinical and Experimental Sciences, Faculty of Medicine , University of Southampton , Southampton SO16 6YD , U.K
| | - James P R Schofield
- Centre for Proteomic Research, Biological Sciences , University of Southampton , Southampton SO17 1BJ , U.K.,NIHR Southampton Biomedical Research Centre, Clinical and Experimental Sciences, Faculty of Medicine , University of Southampton , Southampton SO16 6YD , U.K
| | - Joost Brandsma
- NIHR Southampton Biomedical Research Centre, Clinical and Experimental Sciences, Faculty of Medicine , University of Southampton , Southampton SO16 6YD , U.K
| | - Doroteya Staykova
- Centre for Proteomic Research, Biological Sciences , University of Southampton , Southampton SO17 1BJ , U.K
| | - Caterina Folisi
- Centre for Proteomic Research, Biological Sciences , University of Southampton , Southampton SO17 1BJ , U.K
| | | | - Ben Nicholas
- NIHR Southampton Biomedical Research Centre, Clinical and Experimental Sciences, Faculty of Medicine , University of Southampton , Southampton SO16 6YD , U.K
| | - Yang Xian
- Data Science Institute , Imperial College London , London SW7 2AZ , U.K
| | - Anthony Rowe
- Janssen Research & Development , Buckinghamshire HP12 4DP , U.K
| | | | - Susan Wilson
- NIHR Southampton Biomedical Research Centre, Clinical and Experimental Sciences, Faculty of Medicine , University of Southampton , Southampton SO16 6YD , U.K
| | - Jonathan Ward
- NIHR Southampton Biomedical Research Centre, Clinical and Experimental Sciences, Faculty of Medicine , University of Southampton , Southampton SO16 6YD , U.K
| | - Rene Lutter
- AMC, Department of Experimental Immunology , University of Amsterdam , 1012 WX Amsterdam , The Netherlands.,AMC, Department of Respiratory Medicine , University of Amsterdam , 1012 WX Amsterdam , The Netherlands
| | - Louise Fleming
- Airways Disease , National Heart and Lung Institute, Imperial College, London & Royal Brompton NIHR Biomedical Research Unit , London SW7 2AZ , United Kingdom
| | - Dominick E Shaw
- Respiratory Research Unit , University of Nottingham , Nottingham NG7 2RD , U.K
| | - Per S Bakke
- Institute of Medicine , University of Bergen , 5007 Bergen , Norway
| | - Massimo Caruso
- Department of Clinical and Experimental Medicine Hospital University , University of Catania , 95124 Catania , Italy
| | - Sven-Erik Dahlen
- The Centre for Allergy Research , The Institute of Environmental Medicine, Karolinska Institutet , SE-171 77 Stockholm , Sweden
| | - Stephen J Fowler
- Respiratory and Allergy Research Group , University of Manchester , Manchester M13 9PL , U.K
| | - Simone Hashimoto
- Department of Respiratory Medicine, Academic Medical Centre , University of Amsterdam , 1012 WX Amsterdam , The Netherlands
| | - Ildikó Horváth
- Department of Pulmonology , Semmelweis University , Budapest 1085 , Hungary
| | - Peter Howarth
- NIHR Southampton Biomedical Research Centre, Clinical and Experimental Sciences, Faculty of Medicine , University of Southampton , Southampton SO16 6YD , U.K
| | - Norbert Krug
- Fraunhofer Institute for Toxicology and Experimental Medicine Hannover , 30625 Hannover , Germany
| | - Paolo Montuschi
- Faculty of Medicine , Catholic University of the Sacred Heart , 00168 Rome , Italy
| | - Marek Sanak
- Laboratory of Molecular Biology and Clinical Genetics, Medical College , Jagiellonian University , 31-007 Krakow , Poland
| | - Thomas Sandström
- Department of Medicine, Department of Public Health and Clinical Medicine Respiratory Medicine Unit , Umeå University , 901 87 Umeå , Sweden
| | - Florian Singer
- University Children's Hospital Zurich , 8032 Zurich , Switzerland
| | - Kai Sun
- Data Science Institute , Imperial College London , London SW7 2AZ , U.K
| | - Ioannis Pandis
- Data Science Institute , Imperial College London , London SW7 2AZ , U.K
| | - Charles Auffray
- European Institute for Systems Biology and Medicine, CNRS-ENS-UCBL-INSERM , Université de Lyon , 69007 Lyon , France
| | - Ana R Sousa
- Respiratory Therapeutic Unit, GSK , Stockley Park , Uxbridge UB11 1BT , U.K
| | - Ian M Adcock
- Cell and Molecular Biology Group, Airways Disease Section , National Heart and Lung Institute, Imperial College London , Dovehouse Street , London SW3 6LR , U.K
| | - Kian Fan Chung
- Airways Disease , National Heart and Lung Institute, Imperial College, London & Royal Brompton NIHR Biomedical Research Unit , London SW7 2AZ , United Kingdom
| | - Peter J Sterk
- AMC, Department of Experimental Immunology , University of Amsterdam , 1012 WX Amsterdam , The Netherlands
| | - Ratko Djukanović
- NIHR Southampton Biomedical Research Centre, Clinical and Experimental Sciences, Faculty of Medicine , University of Southampton , Southampton SO16 6YD , U.K
| | - Paul J Skipp
- Centre for Proteomic Research, Biological Sciences , University of Southampton , Southampton SO17 1BJ , U.K
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31
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Martínez G, Diéguez SN, Rodríguez E, Decundo JM, Romanelli A, Fernández Paggi MB, Pérez Gaudio DS, Amanto FA, Soraci AL. Effect of Cynara scolymus and Silybum marianum extracts on bile production in pigs. JOURNAL OF APPLIED ANIMAL RESEARCH 2018. [DOI: 10.1080/09712119.2018.1456441] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Guadalupe Martínez
- Área Toxicología, Departamento de Fisiopatología, Facultad de Ciencias Veterinarias, UNCPBA, Buenos Aires, Argentina
- Centro de Investigación Veterinaria de Tandil (CIVETAN), Facultad de Ciencias Veterinarias, UNCPBA-CONICET-CICPBA, Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas – CONICET, Buenos Aires, Argentina
| | - Susana Nelly Diéguez
- Área Toxicología, Departamento de Fisiopatología, Facultad de Ciencias Veterinarias, UNCPBA, Buenos Aires, Argentina
- Comisión de Investigaciones Científicas de la Provincia de Buenos Aires (CIC-PBA), Buenos Aires, Argentina
| | - Edgardo Rodríguez
- Área Estadística, Sanidad Animal y Medicina Preventiva, Facultad de Ciencias Veterinarias, UNCPBA, Buenos Aires, Argentina
| | - Julieta María Decundo
- Área Toxicología, Departamento de Fisiopatología, Facultad de Ciencias Veterinarias, UNCPBA, Buenos Aires, Argentina
- Centro de Investigación Veterinaria de Tandil (CIVETAN), Facultad de Ciencias Veterinarias, UNCPBA-CONICET-CICPBA, Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas – CONICET, Buenos Aires, Argentina
| | - Agustina Romanelli
- Área Toxicología, Departamento de Fisiopatología, Facultad de Ciencias Veterinarias, UNCPBA, Buenos Aires, Argentina
- Centro de Investigación Veterinaria de Tandil (CIVETAN), Facultad de Ciencias Veterinarias, UNCPBA-CONICET-CICPBA, Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas – CONICET, Buenos Aires, Argentina
| | - María Belén Fernández Paggi
- Área Toxicología, Departamento de Fisiopatología, Facultad de Ciencias Veterinarias, UNCPBA, Buenos Aires, Argentina
- Centro de Investigación Veterinaria de Tandil (CIVETAN), Facultad de Ciencias Veterinarias, UNCPBA-CONICET-CICPBA, Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas – CONICET, Buenos Aires, Argentina
| | - Denisa Soledad Pérez Gaudio
- Área Toxicología, Departamento de Fisiopatología, Facultad de Ciencias Veterinarias, UNCPBA, Buenos Aires, Argentina
- Centro de Investigación Veterinaria de Tandil (CIVETAN), Facultad de Ciencias Veterinarias, UNCPBA-CONICET-CICPBA, Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas – CONICET, Buenos Aires, Argentina
| | - Fabián Andrés Amanto
- Área de Producción Porcina, Departamento de Producción Animal, Facultad de Ciencias Veterinarias, UNCPBA, Buenos Aires, Argentina
| | - Alejandro Luis Soraci
- Área Toxicología, Departamento de Fisiopatología, Facultad de Ciencias Veterinarias, UNCPBA, Buenos Aires, Argentina
- Centro de Investigación Veterinaria de Tandil (CIVETAN), Facultad de Ciencias Veterinarias, UNCPBA-CONICET-CICPBA, Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas – CONICET, Buenos Aires, Argentina
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Williams B, Ghosh M, Boucher CA, Bushman F, Carrington-Lawrence S, Collman RG, Dandekar S, Dang Q, Malaspina A, Paredes R, Wilson CC, Nowak P, Klatt NR, Lagenaur L, Landay AL. A Summary of the Second Annual HIV Microbiome Workshop. AIDS Res Hum Retroviruses 2017; 33:1258-1264. [PMID: 28899105 DOI: 10.1089/aid.2017.0137] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Commensal organisms appear to play significant roles in normal homeostasis as well as in the pathogenesis of HIV infection in a number of different organ systems. On November 17th and 18th, 2016, leading researchers from around the world met to discuss their insights on advances in our understanding of HIV and the microbiome at the National Institutes of Health (NIH) in Bethesda. Dr. Elhanan Borenstein of the University of Washington gave a keynote address where he discussed new developments in systems biology which hold the promise of illuminating the pathways by which these organisms interact with human physiology. He suggested that we need to get past correlations in microbiome research by using models and informatics which incorporate metagenomics to predict functional changes in the microbiome.
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Affiliation(s)
- Brett Williams
- Division of Infectious Diseases, Rush University Medical Center, Chicago, Illinois
| | - Mimi Ghosh
- Department of Epidemiology and Biostatistics, The George Washington University, Washington, District of Columbia
| | - Charles A.B. Boucher
- Department of Virosciences, Erasmus Medical Center, Erasmus University, Rotterdam, the Netherlands
| | - Frederic Bushman
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Stacy Carrington-Lawrence
- Office of AIDS Research, Division of Program Coordination, Planning, and Strategic Initiatives, Office of the Director, US National Institutes of Health, US Department of Health and Human Services, Bethesda, Maryland
| | - Ronald G. Collman
- Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Satya Dandekar
- Department of Medical Microbiology and Immunology, University of California, Davis, Davis, California
| | - Que Dang
- Vaccine Research Program, Division of AIDS, National Institute of Allergy and Infectious Diseases, Bethesda, Maryland
| | - Angela Malaspina
- Vaccine Research Program, Division of AIDS, National Institute of Allergy and Infectious Diseases, Bethesda, Maryland
| | - Roger Paredes
- Institut de Recerca de la SIDA IrsiCaixa i Unitat VIH, Universitat Autònoma de Barcelona, Universitat de Vic, Catalonia, Spain
| | - Cara C. Wilson
- Department of Medicine, University of Colorado at Denver, Aurora, Colorado
| | - Piotr Nowak
- Department of Medicine, Unit of Infectious Diseases, Karolinska University Hospital, Karolinska Institutet, Stockholm, Sweden
| | - Nichole R. Klatt
- Department of Pharmaceutics, Washington National Primate Research Center, University of Washington, Seattle, Washington
| | - Laurel Lagenaur
- Vaccine Branch, National Cancer Institute, National Institutes of Health, Bethesda, Maryland
| | - Alan L. Landay
- Department of Immunology/Microbiology, Rush University Medical Center, Chicago, Illinois
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Cell-Surface and Nuclear Receptors in the Colon as Targets for Bacterial Metabolites and Its Relevance to Colon Health. Nutrients 2017; 9:nu9080856. [PMID: 28796169 PMCID: PMC5579649 DOI: 10.3390/nu9080856] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Revised: 07/31/2017] [Accepted: 08/05/2017] [Indexed: 02/07/2023] Open
Abstract
The symbiotic co-habitation of bacteria in the host colon is mutually beneficial to both partners. While the host provides the place and food for the bacteria to colonize and live, the bacteria in turn help the host in energy and nutritional homeostasis, development and maturation of the mucosal immune system, and protection against inflammation and carcinogenesis. In this review, we highlight the molecular mediators of the effective communication between the bacteria and the host, focusing on selective metabolites from the bacteria that serve as messengers to the host by acting through selective receptors in the host colon. These bacterial metabolites include the short-chain fatty acids acetate, propionate, and butyrate, the tryptophan degradation products indole-3-aldehyde, indole-3-acetic, acid and indole-3-propionic acid, and derivatives of endogenous bile acids. The targets for these bacterial products in the host include the cell-surface G-protein-coupled receptors GPR41, GPR43, and GPR109A and the nuclear receptors aryl hydrocarbon receptor (AhR), pregnane X receptor (PXR), and farnesoid X receptor (FXR). The chemical communication between these bacterial metabolite messengers and the host targets collectively has the ability to impact metabolism, gene expression, and epigenetics in colonic epithelial cells as well as in mucosal immune cells. The end result, for the most part, is the maintenance of optimal colonic health.
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Ji CG, Xie XL, Yin J, Qi W, Chen L, Bai Y, Wang N, Zhao DQ, Jiang XY, Jiang HQ. Bile acid receptor TGR5 overexpression is associated with decreased intestinal mucosal injury and epithelial cell proliferation in obstructive jaundice. Transl Res 2017; 182:88-102. [PMID: 28034761 DOI: 10.1016/j.trsl.2016.12.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Revised: 11/27/2016] [Accepted: 12/02/2016] [Indexed: 12/12/2022]
Abstract
Bile acids stimulate intestinal epithelial proliferation in vitro. We sought to investigate the role of the bile acid receptor TGR5 in the protection of intestinal epithelial proliferation in obstructive jaundice. Intestinal tissues and serum samples were obtained from patients with malignant obstructive jaundice and from bile duct ligation (BDL) rats. Intestinal permeability and morphological changes in the intestinal mucosa were observed. The functions of TGR5 in cell proliferation in intestinal epithelial injury were determined by overexpression or knockdown studies in Caco-2 and FHs 74 Int cells pretreated with lipopolysaccharide (LPS). Internal biliary drainage was superior to external biliary drainage in recovering intestinal permeability and mucosal histology in patients with obstructive jaundice. In BDL rats, feeding of chenodeoxycholic acid (CDCA) decreased intestinal mucosa injury. The levels of PCNA, a marker of proliferation, increased in response to CDCA feeding and were paralleled by elevated TGR5 expression. CDCA upregulated TGR5 expression and promoted proliferation in Caco-2 and FHs 74 Int cells pretreated with LPS. Overexpression of TGR5 resulted in increased PCNA, cell viability, EdU incorporation, and the proportion of cells in S phase, whereas knockdown of TGR5 had the opposite effect. Our data indicate that bile acids promote intestinal epithelial cell proliferation and decrease mucosal injury by upregulating TGR5 expression in obstructive jaundice.
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Affiliation(s)
- Chen-Guang Ji
- Department of Gastroenterology, The Second Hospital of Hebei Medical University, Hebei Key Laboratory of Gastroenterology, Hebei Institute of Gastroenterology, Shijiazhuang, P. R. China; Department of Gastroenterology, The Third Hospital of Hebei Medical University, Shijiazhuang, P. R. China
| | - Xiao-Li Xie
- Department of Gastroenterology, The Second Hospital of Hebei Medical University, Hebei Key Laboratory of Gastroenterology, Hebei Institute of Gastroenterology, Shijiazhuang, P. R. China
| | - Jie Yin
- Department of Gastroenterology, The Second Hospital of Hebei Medical University, Hebei Key Laboratory of Gastroenterology, Hebei Institute of Gastroenterology, Shijiazhuang, P. R. China
| | - Wei Qi
- Department of Gastroenterology, The Second Hospital of Hebei Medical University, Hebei Key Laboratory of Gastroenterology, Hebei Institute of Gastroenterology, Shijiazhuang, P. R. China
| | - Lei Chen
- Department of Gastroenterology, The Second Hospital of Hebei Medical University, Hebei Key Laboratory of Gastroenterology, Hebei Institute of Gastroenterology, Shijiazhuang, P. R. China
| | - Yun Bai
- Department of Gastroenterology, The Second Hospital of Hebei Medical University, Hebei Key Laboratory of Gastroenterology, Hebei Institute of Gastroenterology, Shijiazhuang, P. R. China
| | - Na Wang
- Department of Gastroenterology, The Second Hospital of Hebei Medical University, Hebei Key Laboratory of Gastroenterology, Hebei Institute of Gastroenterology, Shijiazhuang, P. R. China
| | - Dong-Qiang Zhao
- Department of Gastroenterology, The Second Hospital of Hebei Medical University, Hebei Key Laboratory of Gastroenterology, Hebei Institute of Gastroenterology, Shijiazhuang, P. R. China
| | - Xiao-Yu Jiang
- Department of Gastroenterology, The Second Hospital of Hebei Medical University, Hebei Key Laboratory of Gastroenterology, Hebei Institute of Gastroenterology, Shijiazhuang, P. R. China
| | - Hui-Qing Jiang
- Department of Gastroenterology, The Second Hospital of Hebei Medical University, Hebei Key Laboratory of Gastroenterology, Hebei Institute of Gastroenterology, Shijiazhuang, P. R. China.
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Byrum SD, Burdine MS, Orr L, Mackintosh SG, Authier S, Pouliot M, Hauer-Jensen M, Tackett AJ. Time- and radiation-dose dependent changes in the plasma proteome after total body irradiation of non-human primates: Implications for biomarker selection. PLoS One 2017; 12:e0174771. [PMID: 28350824 PMCID: PMC5370149 DOI: 10.1371/journal.pone.0174771] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Accepted: 03/15/2017] [Indexed: 01/28/2023] Open
Abstract
Acute radiation syndrome (ARS) is a complex multi-organ disease resulting from total body exposure to high doses of radiation. Individuals can be exposed to total body irradiation (TBI) in a number of ways, including terrorist radiological weapons or nuclear accidents. In order to determine whether an individual has been exposed to high doses of radiation and needs countermeasure treatment, robust biomarkers are needed to estimate radiation exposure from biospecimens such as blood or urine. In order to identity such candidate biomarkers of radiation exposure, high-resolution proteomics was used to analyze plasma from non-human primates following whole body irradiation (Co-60 at 6.7 Gy and 7.4 Gy) with a twelve day observation period. A total of 663 proteins were evaluated from the plasma proteome analysis. A panel of plasma proteins with characteristic time- and dose-dependent changes was identified. In addition to the plasma proteomics study reported here, we recently identified candidate biomarkers using urine from these same non-human primates. From the proteomic analysis of both plasma and urine, we identified ten overlapping proteins that significantly differentiate both time and dose variables. These shared plasma and urine proteins represent optimal candidate biomarkers of radiation exposure.
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Affiliation(s)
- Stephanie D. Byrum
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
| | - Marie S. Burdine
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
| | - Lisa Orr
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
| | - Samuel G. Mackintosh
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
| | | | | | - Martin Hauer-Jensen
- Division of Radiation Health, University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
| | - Alan J. Tackett
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
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Sun MY, Lin JN. Relationship between NR1I2 polymorphisms and inflammatory bowel disease risk: A systematic review and meta-analysis. Clin Res Hepatol Gastroenterol 2017; 41:230-239. [PMID: 27894906 DOI: 10.1016/j.clinre.2016.10.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Revised: 09/21/2016] [Accepted: 10/18/2016] [Indexed: 02/04/2023]
Abstract
BACKGROUND AND OBJECTIVE Inconsistent results regarding an association between polymorphisms within the Homo sapiens nuclear receptor subfamily 1 group I member 2 (NR1I2) gene and susceptibility to inflammatory bowel disease (IBD) have been reported. A systematic review and meta-analysis was thus undertaken to determine whether NR1I2 gene polymorphisms are associated with an increased risk of IBD. METHODS Article retrieval was performed using on-line databases, such as PubMed, Embase, CENTRAL, and WOS. After extracting eligible data, Mantel-Haenszel statistics were applied to calculate the odds radio (OR), 95% confidence interval (95% CI) and P value under a random or fixed-effects model. RESULTS A total of seven articles with 4410 IBD subjects and 4028 controls were included. Compared with the control group, no significant increase in IBD susceptibility was observed for the -25385C/T (OR=0.92, 95% CI=0.78∼1.07, P=0.259), -24381A/C (OR=0.96, 95% CI=0.87∼1.06, P=0.378), +8055C/T (OR=1.06, 95% CI=0.97∼1.15, P=0.186), or +7635A/G (OR=0.96, 95% CI=0.87∼1.05, P=0.348) polymorphisms within the NR1I2 gene under the allele model. CONCLUSIONS Our meta-analysis failed to demonstrate an association between -25385C/T, -24381A/C, +8055C/T, or +7635A/G polymorphisms within the NR1I2 gene and overall IBD risk. A larger sample size is needed to validate our conclusion.
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Affiliation(s)
- Man-Yi Sun
- Department of Gastroenterology, Tianjin Union Medicine Center & Tianjin People's Hospital, 300121 Tianjin, PR China
| | - Jing-Na Lin
- Department of Endocrinology, Tianjin Union Medicine Center & Tianjin People's Hospital, Hongqiao District, Jieyuan Road No. 190, 300121 Tianjin, PR China.
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Newmark H, Dantoft W, Ghazal P. Evolutionary Origin of the Interferon-Immune Metabolic Axis: The Sterol-Vitamin D Link. Front Immunol 2017; 8:62. [PMID: 28232830 PMCID: PMC5298971 DOI: 10.3389/fimmu.2017.00062] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Accepted: 01/16/2017] [Indexed: 12/24/2022] Open
Abstract
In vertebrate animals, the sterol metabolic network is emerging as a central player in immunity and inflammation. Upon infection, flux in the network is acutely moderated by the interferon (IFN) response through direct molecular and bi-directional communications. How sterol metabolism became linked to IFN control and for what purpose is not obvious. Here, we deliberate on the origins of these connections based on a systematic review of the literature. A narrative synthesis of publications that met eligibility criteria allowed us to trace an evolutionary path and functional connections between cholesterol metabolism and immunity. The synthesis supports an ancestral link between toxic levels of cholesterol-like products and the vitamin D receptor (VDR). VDR is an ancient nuclear hormone receptor that was originally involved in the recognition and detoxification of xenobiotic marine biotoxins exhibiting planar sterol ring scaffolds present in aquatic environments. Coadaptation of this receptor with the acquisition of sterol biosynthesis and IFNs in vertebrate animals set a stage for repurposing and linking a preexisting host-protection mechanism of harmful xenobiotics to become an important regulator in three key interlinked biological processes: bone development, immunity, and calcium homeostasis. We put forward the hypothesis that sterol metabolites, especially oxysterols, have acted as evolutionary drivers in immunity and may represent the first example of small-molecule metabolites linked to the adaptive coevolution and diversification of host metabolic and immune regulatory pathways.
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Affiliation(s)
- Harry Newmark
- Division of Infection and Pathway Medicine, School of Biomedical Sciences, University of Edinburgh , Edinburgh , UK
| | - Widad Dantoft
- Division of Infection and Pathway Medicine, School of Biomedical Sciences, University of Edinburgh , Edinburgh , UK
| | - Peter Ghazal
- Division of Infection and Pathway Medicine, School of Biomedical Sciences, University of Edinburgh , Edinburgh , UK
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Ceulemans LJ, Verbeke L, Decuypere JP, Farré R, De Hertogh G, Lenaerts K, Jochmans I, Monbaliu D, Nevens F, Tack J, Laleman W, Pirenne J. Farnesoid X Receptor Activation Attenuates Intestinal Ischemia Reperfusion Injury in Rats. PLoS One 2017; 12:e0169331. [PMID: 28060943 PMCID: PMC5218501 DOI: 10.1371/journal.pone.0169331] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2016] [Accepted: 11/28/2016] [Indexed: 12/12/2022] Open
Abstract
INTRODUCTION The farnesoid X receptor (FXR) is abundantly expressed in the ileum, where it exerts an enteroprotective role as a key regulator of intestinal innate immunity and homeostasis, as shown in pre-clinical models of inflammatory bowel disease. Since intestinal ischemia reperfusion injury (IRI) is characterized by hyperpermeability, bacterial translocation and inflammation, we aimed to investigate, for the first time, if the FXR-agonist obeticholic acid (OCA) could attenuate intestinal ischemia reperfusion injury. MATERIAL AND METHODS In a validated rat model of intestinal IRI (laparotomy + temporary mesenteric artery clamping), 3 conditions were tested (n = 16/group): laparotomy only (sham group); ischemia 60min+ reperfusion 60min + vehicle pretreatment (IR group); ischemia 60min + reperfusion 60min + OCA pretreatment (IR+OCA group). Vehicle or OCA (INT-747, 2*30mg/kg) was administered by gavage 24h and 4h prior to IRI. The following end-points were analyzed: 7-day survival; biomarkers of enterocyte viability (L-lactate, I-FABP); histology (morphologic injury to villi/crypts and villus length); intestinal permeability (Ussing chamber); endotoxin translocation (Lipopolysaccharide assay); cytokines (IL-6, IL-1-β, TNFα, IFN-γ IL-10, IL-13); apoptosis (cleaved caspase-3); and autophagy (LC3, p62). RESULTS It was found that intestinal IRI was associated with high mortality (90%); loss of intestinal integrity (structurally and functionally); increased endotoxin translocation and pro-inflammatory cytokine production; and inhibition of autophagy. Conversely, OCA-pretreatment improved 7-day survival up to 50% which was associated with prevention of epithelial injury, preserved intestinal architecture and permeability. Additionally, FXR-agonism led to decreased pro-inflammatory cytokine release and alleviated autophagy inhibition. CONCLUSION Pretreatment with OCA, an FXR-agonist, improves survival in a rodent model of intestinal IRI, preserves the gut barrier function and suppresses inflammation. These results turn FXR into a promising target for various conditions associated with intestinal ischemia.
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Affiliation(s)
- Laurens J Ceulemans
- Abdominal Transplant Surgery, University Hospitals Leuven, & Department of Microbiology and Immunology, KU Leuven, Belgium
| | - Len Verbeke
- Liver and Biliopancreatic Disorders, University Hospitals Leuven, KU Leuven, Belgium
| | - Jean-Paul Decuypere
- Abdominal Transplant Surgery, University Hospitals Leuven, & Department of Microbiology and Immunology, KU Leuven, Belgium
| | - Ricard Farré
- Gastro-enterology, University Hospitals Leuven, & Translational Research in Gastro-Intestinal Disorders (TARGID), KU Leuven, Belgium
| | - Gert De Hertogh
- Translational Cell and Tissue Research, University Hospitals Leuven, & Department of Imaging and Pathology, KU Leuven, Belgium
| | - Kaatje Lenaerts
- Department of Surgery, Maastricht University Medical Centre, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht, the Netherlands
| | - Ina Jochmans
- Abdominal Transplant Surgery, University Hospitals Leuven, & Department of Microbiology and Immunology, KU Leuven, Belgium
| | - Diethard Monbaliu
- Abdominal Transplant Surgery, University Hospitals Leuven, & Department of Microbiology and Immunology, KU Leuven, Belgium
| | - Frederik Nevens
- Liver and Biliopancreatic Disorders, University Hospitals Leuven, KU Leuven, Belgium
| | - Jan Tack
- Gastro-enterology, University Hospitals Leuven, & Translational Research in Gastro-Intestinal Disorders (TARGID), KU Leuven, Belgium
| | - Wim Laleman
- Liver and Biliopancreatic Disorders, University Hospitals Leuven, KU Leuven, Belgium
| | - Jacques Pirenne
- Abdominal Transplant Surgery, University Hospitals Leuven, & Department of Microbiology and Immunology, KU Leuven, Belgium
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Li S, Vinci A, Behnsen J, Cheng C, Jellbauer S, Raffatellu M, Sousa KM, Edwards R, Nguyen NT, Stamos MJ, Pigazzi A. Bariatric surgery attenuates colitis in an obese murine model. Surg Obes Relat Dis 2016; 13:661-668. [PMID: 28185763 DOI: 10.1016/j.soard.2016.10.024] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Revised: 10/21/2016] [Accepted: 10/29/2016] [Indexed: 01/04/2023]
Abstract
BACKGROUND Obesity and inflammatory bowel disease (IBD) represent chronic inflammatory conditions. Bariatric surgery improves some obesity-related co-morbidities, but the effects of bariatric surgery on IBD have not been well studied. OBJECTIVES To examine if bariatric surgery may attenuate colitis in an obese murine model of IBD and study the mechanisms underlying the postsurgical amelioration of intestinal inflammation. SETTING University of California Irvine, Department of Surgery and Microbiology laboratories. METHODS Obese mice were assigned to one of 2 bariatric procedures [Duodenojejunal Bypass (DJB n = 6), Sleeve Gastrectomy (SG n = 8)]. Sham-operated mice were (Sham n = 8) were used as a control. After recovering from surgery, IBD was induced by administration of 2% dextran sodium sulfate. Fecal samples were collected before and after IBD induction for microbiome analysis. Pathologic analyses and immunohistochemical staining were performed on colon. RESULTS Survival after DJB and SG was higher relative to Sham mice. Histologically, DJB mice had significantly less intestinal inflammation. The observed improvements were not related to a difference in weight among the groups. Farnesoid X receptor staining in the colon was observed quantitatively more in DJB than in SG and sham mice. A statistically significant increase in the number of Lactobacillales was observed in the stool of mice after DJB. CONCLUSION These results suggest that bariatric surgery, in particular DJB, reduces the severity of colitis in a chemically-induced IBD murine model. The anticolitis effects of DJB may be associated with Farnesoid X receptor regulation and gut microbiome rearrangements.
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Affiliation(s)
- Shiri Li
- Department of Surgery, University of California, Irvine, CA
| | - Alessio Vinci
- Department of Surgery, University of California, Irvine, CA
| | - Judith Behnsen
- Microbiology and Molecular Genetics, University of California, Irvine, CA
| | - Chunmei Cheng
- Department of Surgery, University of California, Irvine, CA
| | - Stefan Jellbauer
- Microbiology and Molecular Genetics, University of California, Irvine, CA
| | - Manuela Raffatellu
- Microbiology and Molecular Genetics, University of California, Irvine, CA
| | - Kyle M Sousa
- Department of Pharmaceutical Sciences, West Coast University, Los Angeles, CA
| | - Robert Edwards
- Department of Pathology & Laboratory Medicine, University of California, Irvine, CA
| | - Ninh T Nguyen
- Department of Surgery, University of California, Irvine, CA
| | | | - Alessio Pigazzi
- Department of Surgery, University of California, Irvine, CA.
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Kortner TM, Penn MH, Bjӧrkhem I, Måsøval K, Krogdahl Å. Bile components and lecithin supplemented to plant based diets do not diminish diet related intestinal inflammation in Atlantic salmon. BMC Vet Res 2016; 12:190. [PMID: 27604133 PMCID: PMC5015236 DOI: 10.1186/s12917-016-0819-0] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Accepted: 09/01/2016] [Indexed: 10/26/2022] Open
Abstract
BACKGROUND The present study was undertaken to gain knowledge on the role of bile components and lecithin on development of aberrations in digestive functions which seemingly have increased in Atlantic salmon in parallel with the increased use of plant ingredients in fish feed. Post smolt Atlantic salmon were fed for 77 days one of three basal diets: a high fish meal diet (HFM), a low fishmeal diet (LFM), or a diet with high protein soybean meal (HPS). Five additional diets were made from the LFM diet by supplementing with: purified taurocholate (1.8 %), bovine bile salt (1.8 %), taurine (0.4 %), lecithin (1.5 %), or a mix of supplements (suppl mix) containing taurocholate (1.8 %), cholesterol (1.5 %) and lecithin (0.4 %). Two additional diets were made from the HPS diet by supplementing with: bovine bile salt (1.8 %) or the suppl mix. Body and intestinal weights were recorded, and blood, bile, intestinal tissues and digesta were sampled for evaluation of growth, nutrient metabolism and intestinal structure and function. RESULTS In comparison with fish fed the HFM diet fish fed the LFM and HPS diets grew less and showed reduced plasma bile salt and cholesterol levels. Histological examination of the distal intestine showed signs of enteritis in both LFM and HPS diet groups, though more pronounced in the HPS diet group. The HPS diet reduced digesta dry matter and capacity of leucine amino peptidase in the distal intestine. None of the dietary supplements improved endpoints regarding fish performance, gut function or inflammation in the distal intestine. Some endpoints rather indicated negative effects. CONCLUSIONS Dietary supplementation with bile components or lecithin in general did not improve endpoints regarding performance or gut health in Atlantic salmon, in clear contrast to what has been previously reported for rainbow trout. Follow-up studies are needed to clarify if lower levels of bile salts and cholesterol may give different and beneficial effects, or if other supplements, and other combinations of supplements might prevent or ameliorate inflammation in the distal intestine.
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Affiliation(s)
- Trond M Kortner
- Department of Basic Sciences and Aquatic Medicine, Faculty of Veterinary Medicine and Biosciences, Norwegian University of Life Sciences, Oslo, Norway.
| | - Michael H Penn
- Department of Basic Sciences and Aquatic Medicine, Faculty of Veterinary Medicine and Biosciences, Norwegian University of Life Sciences, Oslo, Norway.,Present Address: US Fish & Wildlife Service, Lamar, PA, 16848, USA
| | - Ingemar Bjӧrkhem
- Department of Laboratory Medicine, Division for Clinical Chemistry, Karolinska University Hospital, Huddinge, Sweden
| | | | - Åshild Krogdahl
- Department of Basic Sciences and Aquatic Medicine, Faculty of Veterinary Medicine and Biosciences, Norwegian University of Life Sciences, Oslo, Norway
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Ceulemans LJ, Canovai E, Verbeke L, Pirenne J, Farré R. The expanding role of the bile acid receptor farnesoid X in the intestine and its potential clinical implications. Acta Chir Belg 2016; 116:156-163. [PMID: 27684270 DOI: 10.1080/00015458.2016.1215953] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Knowledge about the role of farnesoid X receptor (FXR) in the intestine is rapidly expanding. In pre-clinical animal models of inflammatory bowel disease and bile duct ligation, FXR activation has proven to directly target the three pillars of intestinal homeostasis: intestinal permeability, inflammation and bacterial translocation. The protective role of FXR-ligands on this homeostasis has implications for many intestinal pathologies like inflammatory bowel disease, ischemia reperfusion injury, the metabolic syndrome, colon cancer and even diarrhea. In this review, we summarize the mechanisms by which FXR-activation exerts these protective effects and we discuss its potential clinical applications.
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Baars A, Oosting A, Knol J, Garssen J, van Bergenhenegouwen J. The Gut Microbiota as a Therapeutic Target in IBD and Metabolic Disease: A Role for the Bile Acid Receptors FXR and TGR5. Microorganisms 2015; 3:641-66. [PMID: 27682110 PMCID: PMC5023267 DOI: 10.3390/microorganisms3040641] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Accepted: 10/01/2015] [Indexed: 12/18/2022] Open
Abstract
The gut microbiota plays a crucial role in regulating many physiological systems of the host, including the metabolic and immune system. Disturbances in microbiota composition are increasingly correlated with disease; however, the underlying mechanisms are not well understood. Recent evidence suggests that changes in microbiota composition directly affect the metabolism of bile salts. Next to their role in digestion of dietary fats, bile salts function as signaling molecules for bile salt receptors such as Farnesoid X receptor (FXR) and G protein-coupled bile acid receptor (TGR5). Complementary to their role in metabolism, FXR and TGR5 are shown to play a role in intestinal homeostasis and immune regulation. This review presents an overview of evidence showing that changes in bile salt pool and composition due to changes in gut microbial composition contribute to the pathogenesis of inflammatory bowel disease and metabolic disease, possibly through altered activation of TGR5 and FXR. We further discuss how dietary interventions, such as pro- and synbiotics, may be used to treat metabolic disease and inflammatory bowel disease (IBD) through normalization of bile acid dysregulation directly or indirectly through normalization of the intestinal microbiota.
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Affiliation(s)
| | | | - Jan Knol
- Nutricia Research, 3584 CT, Utrecht, The Netherlands.
- Laboratory of Microbiology, Wageningen University, 6703 HB, Wageningen, The Netherlands.
| | - Johan Garssen
- Nutricia Research, 3584 CT, Utrecht, The Netherlands.
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Faculty of Science, Utrecht University, 3584 CG, Utrecht, The Netherlands.
| | - Jeroen van Bergenhenegouwen
- Nutricia Research, 3584 CT, Utrecht, The Netherlands.
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Faculty of Science, Utrecht University, 3584 CG, Utrecht, The Netherlands.
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Mazuy C, Helleboid A, Staels B, Lefebvre P. Nuclear bile acid signaling through the farnesoid X receptor. Cell Mol Life Sci 2015; 72:1631-50. [PMID: 25511198 PMCID: PMC11113650 DOI: 10.1007/s00018-014-1805-y] [Citation(s) in RCA: 84] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Revised: 12/04/2014] [Accepted: 12/08/2014] [Indexed: 12/16/2022]
Abstract
Bile acids (BAs) are amphipathic molecules produced from cholesterol by the liver. Expelled from the gallbladder upon meal ingestion, BAs serve as fat solubilizers in the intestine. BAs are reabsorbed in the ileum and return via the portal vein to the liver where, together with nutrients, they provide signals to coordinate metabolic responses. BAs act on energy and metabolic homeostasis through the activation of membrane and nuclear receptors, among which the nuclear receptor farnesoid X receptor (FXR) is an important regulator of several metabolic pathways. Highly expressed in the liver and the small intestine, FXR contributes to BA effects on metabolism, inflammation and cell cycle control. The pharmacological modulation of its activity has emerged as a potential therapeutic strategy for liver and metabolic diseases. This review highlights recent advances regarding the mechanisms by which the BA sensor FXR contributes to global signaling effects of BAs, and how FXR activity may be regulated by nutrient-sensitive signaling pathways.
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Affiliation(s)
- Claire Mazuy
- European Genomic Institute for Diabetes (EGID), 59000 Lille, France
- INSERM UMR1011-Bâtiment J&K, 59000 Lille, France
- University Lille 2, 59000 Lille, France
- Institut Pasteur de Lille, 59019 Lille, France
| | - Audrey Helleboid
- European Genomic Institute for Diabetes (EGID), 59000 Lille, France
- INSERM UMR1011-Bâtiment J&K, 59000 Lille, France
- University Lille 2, 59000 Lille, France
- Institut Pasteur de Lille, 59019 Lille, France
| | - Bart Staels
- European Genomic Institute for Diabetes (EGID), 59000 Lille, France
- INSERM UMR1011-Bâtiment J&K, 59000 Lille, France
- University Lille 2, 59000 Lille, France
- Institut Pasteur de Lille, 59019 Lille, France
| | - Philippe Lefebvre
- European Genomic Institute for Diabetes (EGID), 59000 Lille, France
- INSERM UMR1011-Bâtiment J&K, 59000 Lille, France
- University Lille 2, 59000 Lille, France
- Institut Pasteur de Lille, 59019 Lille, France
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Abstract
Bile acids are the end products of cholesterol catabolism. Hepatic bile acid synthesis accounts for a major fraction of daily cholesterol turnover in humans. Biliary secretion of bile acids generates bile flow and facilitates hepatobiliary secretion of lipids, lipophilic metabolites, and xenobiotics. In the intestine, bile acids are essential for the absorption, transport, and metabolism of dietary fats and lipid-soluble vitamins. Extensive research in the last 2 decades has unveiled new functions of bile acids as signaling molecules and metabolic integrators. The bile acid-activated nuclear receptors farnesoid X receptor, pregnane X receptor, constitutive androstane receptor, vitamin D receptor, and G protein-coupled bile acid receptor play critical roles in the regulation of lipid, glucose, and energy metabolism, inflammation, and drug metabolism and detoxification. Bile acid synthesis exhibits a strong diurnal rhythm, which is entrained by fasting and refeeding as well as nutrient status and plays an important role for maintaining metabolic homeostasis. Recent research revealed an interaction of liver bile acids and gut microbiota in the regulation of liver metabolism. Circadian disturbance and altered gut microbiota contribute to the pathogenesis of liver diseases, inflammatory bowel diseases, nonalcoholic fatty liver disease, diabetes, and obesity. Bile acids and their derivatives are potential therapeutic agents for treating metabolic diseases of the liver.
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Affiliation(s)
- Tiangang Li
- Department of Pharmacology, Toxicology and Therapeutics, University of Kansas Medical Center, Kansas City, Kansas (T.L.); and Department of Integrative Medical Sciences, Northeast Ohio Medical University, Rootstown, Ohio (J.Y.L.C.)
| | - John Y L Chiang
- Department of Pharmacology, Toxicology and Therapeutics, University of Kansas Medical Center, Kansas City, Kansas (T.L.); and Department of Integrative Medical Sciences, Northeast Ohio Medical University, Rootstown, Ohio (J.Y.L.C.)
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Bile acid signaling through farnesoid X and TGR5 receptors in hepatobiliary and intestinal diseases. Hepatobiliary Pancreat Dis Int 2015; 14:18-33. [PMID: 25655287 DOI: 10.1016/s1499-3872(14)60307-6] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
BACKGROUND The well-known functions of bile acids (BAs) are the emulsification and absorption of lipophilic xenobiotics. However, the emerging evidences in the past decade showed that BAs act as signaling molecules that not only autoregulate their own metabolism and enterohepatic recirculation, but also as important regulators of integrative metabolism by activating nuclear and membrane-bound G protein-coupled receptors. The present review was to get insight into the role of maintenance of BA homeostasis and BA signaling pathways in development and management of hepatobiliary and intestinal diseases. DATA SOURCES Detailed and comprehensive search of PubMed and Scopus databases was carried out for original and review articles. RESULTS Disturbances in BA homeostasis contribute to the development of several hepatobiliary and intestinal disorders, such as non-alcoholic fatty liver disease, liver cirrhosis, cholesterol gallstone disease, intestinal diseases and both hepatocellular and colorectal carcinoma. CONCLUSION Further efforts made in order to advance the understanding of sophisticated BA signaling network may be promising in developing novel therapeutic strategies related not only to hepatobiliary and gastrointestinal but also systemic diseases.
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Lutz P, Berger C, Langhans B, Grünhage F, Appenrodt B, Nattermann J, Lammert F, Hoerauf A, Sauerbruch T, Strassburg CP, Spengler U, Nischalke HD. A farnesoid X receptor polymorphism predisposes to spontaneous bacterial peritonitis. Dig Liver Dis 2014; 46:1047-50. [PMID: 25086996 DOI: 10.1016/j.dld.2014.07.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2014] [Revised: 06/30/2014] [Accepted: 07/04/2014] [Indexed: 12/11/2022]
Abstract
BACKGROUND In mice, the farnesoid X receptor is involved in bacterial translocation, which can result in spontaneous bacterial peritonitis in patients with cirrhosis. We investigated if polymorphisms in the farnesoid X receptor gene influence the risk for spontaneous bacterial peritonitis. METHODS Laboratory and clinical data of 293 cirrhotic patients with ascites and 226 healthy controls were prospectively collected. The rs56163822, rs11110390 and rs12313471 polymorphisms of the farnesoid X receptor were determined. RESULTS 115 (39%) patients had spontaneous bacterial peritonitis. Distribution of all farnesoid X receptor genotypes matched the Hardy-Weinberg equilibrium. Patients with spontaneous bacterial peritonitis had a higher frequency of the rs56163822 GT genotype (7.0%) than patients without (1.7%, OR=4.4, p=0.02). This genotype was confirmed as predictor of spontaneous bacterial peritonitis by binary logistic regression analysis (OR=6.8, p=0.018). CONCLUSION The farnesoid X receptor rs56163822 GT genotype increases the risk for spontaneous bacterial peritonitis in cirrhotic patients with ascites.
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Affiliation(s)
- Philipp Lutz
- Department of Internal Medicine I, University of Bonn, Bonn, Germany; German Center for Infection Research, Germany.
| | - Cordula Berger
- Department of Internal Medicine I, University of Bonn, Bonn, Germany
| | - Bettina Langhans
- Department of Internal Medicine I, University of Bonn, Bonn, Germany
| | - Frank Grünhage
- Department of Medicine II, Saarland University Medical Center, Saarland University, Homburg, Germany
| | - Beate Appenrodt
- Department of Medicine II, Saarland University Medical Center, Saarland University, Homburg, Germany
| | - Jacob Nattermann
- Department of Internal Medicine I, University of Bonn, Bonn, Germany; German Center for Infection Research, Germany
| | - Frank Lammert
- Department of Medicine II, Saarland University Medical Center, Saarland University, Homburg, Germany
| | - Achim Hoerauf
- Institute for Medical Microbiology, Immunology and Parasitology, University of Bonn, Bonn, Germany; German Center for Infection Research, Germany
| | - Tilman Sauerbruch
- Department of Internal Medicine I, University of Bonn, Bonn, Germany
| | - Christian P Strassburg
- Department of Internal Medicine I, University of Bonn, Bonn, Germany; German Center for Infection Research, Germany
| | - Ulrich Spengler
- Department of Internal Medicine I, University of Bonn, Bonn, Germany; German Center for Infection Research, Germany
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Sauerbruch T, Trebicka J. Future therapy of portal hypertension in liver cirrhosis - a guess. F1000PRIME REPORTS 2014; 6:95. [PMID: 25374673 PMCID: PMC4191223 DOI: 10.12703/p6-95] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
In patients with chronic liver disease, portal hypertension is driven by progressive fibrosis and intrahepatic vasoconstriction. Interruption of the initiating and perpetuating etiology—mostly leading to necroinflammation—is possible for several underlying causes, such as autoimmune hepatitis, hepatitis B virus (HBV) infection, and most recently hepatitis C virus (HCV) infection. Thus, in the long run, lifestyle-related liver damage due to chronic alcoholism or morbid obesity will remain the main factor leading to portal hypertension. Both causes are probably more easily countered by socioeconomic measures than by individual approaches. If chronic liver injury supporting fibrogenesis and portal hypertension cannot be interrupted, a wide variety of tools are available to modulate and reduce intrahepatic resistance and therewith portal hypertension. Many of these have been evaluated in animal models. Also, some well-established drugs, which are used in humans for other indications (for example, statins), are promising if applied early and concomitantly to standard therapy. In the future, more individually tailored strategies must also be considered in line with the spectrum of portal hypertensive complications and risk factors defined by high-throughput analysis of the patient’s genome, transcriptome, metabolome, or microbiome.
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Stojančević M, Pavlović N, Goločorbin-Kon S, Mikov M. Application of bile acids in drug formulation and delivery. FRONTIERS IN LIFE SCIENCE 2014. [DOI: 10.1080/21553769.2013.879925] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Nahidi L, Day AS, Lemberg DA, Leach ST. Paediatric inflammatory bowel disease: a mechanistic approach to investigate exclusive enteral nutrition treatment. SCIENTIFICA 2014; 2014:423817. [PMID: 24967146 PMCID: PMC4055462 DOI: 10.1155/2014/423817] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Revised: 04/24/2014] [Accepted: 05/05/2014] [Indexed: 05/07/2023]
Abstract
The inflammatory bowel diseases (IBD) include Crohn's disease (CD) and ulcerative colitis. The disease may present at any age although the peak of presentation is the second and third decades of life. The incidences of these diseases are increasing around the world with the age of presentation getting younger. At present CD is incurable with colectomy being the treatment for severe UC. Although several pharmacological approaches are used to modulate the inflammatory response in IBD, few lead to histological healing and most have side effects. An alternative approach is to use enteral formulae given exclusively (EEN) to treat IBD. EEN requires the consumption of an elemental or polymeric formula, with the exclusion of all other nutrients, for a period of up to 12 weeks. The introduction of EEN as a therapeutic option for IBD was through prudent observation; however, EEN has become an established and reliable option for the treatment of paediatric IBD. Despite this, the mechanisms through which EEN induces disease remission are unknown and remain hypothetical. This review will discuss recent research into EEN both describing clinical features of EEN therapy and discussing the most up-to-date understanding of the mechanisms through which EEN may be reducing intestinal inflammation and inducing disease remission.
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Affiliation(s)
- Lily Nahidi
- School of Women's and Children's Health, University of New South Wales, Randwick, Sydney, NSW 2052, Australia
| | - Andrew S. Day
- Department of Paediatrics, University of Otago, Christchurch, Christchurch 8140, New Zealand
| | - Daniel A. Lemberg
- Department of Gastroenterology, Sydney Children's Hospital, Randwick, Sydney, NSW 2031, Australia
| | - Steven T. Leach
- School of Women's and Children's Health, University of New South Wales, Randwick, Sydney, NSW 2052, Australia
- Westfield Research Laboratories, Level 2, Sydney Children's Hospital, High Street, Randwick, NSW 2031, Australia
- *Steven T. Leach:
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50
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Mani S, Boelsterli UA, Redinbo MR. Understanding and modulating mammalian-microbial communication for improved human health. Annu Rev Pharmacol Toxicol 2013; 3. [PMID: 27942535 PMCID: PMC5145265 DOI: 10.11131/2016/101199] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The molecular basis for the regulation of the intestinal barrier is a very fertile research area. A growing body of knowledge supports the targeting of various components of intestinal barrier function as means to treat a variety of diseases, including the inflammatory bowel diseases. Herein, we will summarize the current state of knowledge of key xenobiotic receptor regulators of barrier function, highlighting recent advances, such that the field and its future are succinctly reviewed. We posit that these receptors confer an additional dimension of host-microbe interaction in the gut, by sensing and responding to metabolites released from the symbiotic microbiota, in innate immunity and also in host drug metabolism. The scientific evidence for involvement of the receptors and its molecular basis for the control of barrier function and innate immunity regulation would serve as a rationale towards development of non-toxic probes and ligands as drugs.
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Affiliation(s)
- Sridhar Mani
- Departments of Medicine and Genetics, Albert Einstein College of Medicine, Bronx, New York 10461
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