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Acosta JE, Burns JL, Hillyer LM, Van K, Brendel EBK, Law C, Ma DWL, Monk JM. Effect of Lifelong Exposure to Dietary Plant and Marine Sources of n-3 Polyunsaturated Fatty Acids on Morphologic and Gene Expression Biomarkers of Intestinal Health in Early Life. Nutrients 2024; 16:719. [PMID: 38474847 DOI: 10.3390/nu16050719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 02/26/2024] [Accepted: 02/27/2024] [Indexed: 03/14/2024] Open
Abstract
Altered intestinal health is also associated with the incidence and severity of many chronic inflammatory conditions, which could be attenuated via dietary n-3 PUFA interventions. However, little is known about the effect of lifelong exposure to n-3 PUFA from plant and marine sources (beginning in utero via the maternal diet) on early life biomarkers of intestinal health. Harems of C57Bl/6 mice were randomly assigned to one of three isocaloric AIN-93G modified diets differing in their fat sources consisting of the following: (i) 10% safflower oil (SO, enriched in n-6 PUFA), (ii) 3% flaxseed oil + 7% safflower oil (FX, plant-based n-3 PUFA-enriched diet), or (iii) 3% menhaden fish oil + 7% safflower oil (MO, marine-based n-3 PUFA-enriched diet). Mothers remained on these diets throughout pregnancy and offspring (n = 14/diet) continued on the same parental diet until termination at 3 weeks of age. In ileum, villi:crypt length ratios were increased in both the FX and MO dietary groups compared to SO (p < 0.05). Ileum mRNA expression of critical intestinal health biomarkers was increased by both n-3 PUFA-enriched diets including Relmβ and REG3γ compared to SO (p < 0.05), whereas only the FX diet increased mRNA expression of TFF3 and Muc2 (p < 0.05) and only the MO diet increased mRNA expression of ZO-1 (p < 0.05). In the proximal colon, both the FX and MO diets increased crypt lengths compared to SO (p < 0.05), whereas only the MO diet increased goblet cell numbers compared to SO (p < 0.05). Further, the MO diet increased proximal colon mRNA expression of Relmβ and REG3γ (p < 0.05) and both MO and FX increased mRNA expression of Muc2 compared to SO (p < 0.05). Collectively, these results demonstrate that lifelong exposure to dietary n-3 PUFA, beginning in utero, from both plant and marine sources, can support intestinal health development in early life. The differential effects between plant and marine sources warrants further investigation for optimizing health.
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Affiliation(s)
- Julianna E Acosta
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Jessie L Burns
- Department of Health Sciences, Carleton University, Ottawa, ON K1S 5B6, Canada
| | - Lyn M Hillyer
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Kelsey Van
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Elaina B K Brendel
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Camille Law
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - David W L Ma
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Jennifer M Monk
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON N1G 2W1, Canada
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Song C, Chai Z, Chen S, Zhang H, Zhang X, Zhou Y. Intestinal mucus components and secretion mechanisms: what we do and do not know. Exp Mol Med 2023; 55:681-691. [PMID: 37009791 PMCID: PMC10167328 DOI: 10.1038/s12276-023-00960-y] [Citation(s) in RCA: 23] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Accepted: 12/26/2022] [Indexed: 04/04/2023] Open
Abstract
Damage to the colon mucus barrier, the first line of defense against microorganisms, is an important determinant of intestinal diseases such as inflammatory bowel disease and colorectal cancer, and disorder in extraintestinal organs. The mucus layer has attracted the attention of the scientific community in recent years, and with the discovery of new mucosal components, it has become increasingly clear that the mucosal barrier is a complex system composed of many components. Moreover, certain components are jointly involved in regulating the structure and function of the mucus barrier. Therefore, a comprehensive and systematic understanding of the functional components of the mucus layer is clearly warranted. In this review, we summarize the various functional components of the mucus layer identified thus far and describe their unique roles in shaping mucosal structure and function. Furthermore, we detail the mechanisms underlying mucus secretion, including baseline and stimulated secretion. In our opinion, baseline secretion can be categorized into spontaneous Ca2+ oscillation-mediated slow and continuous secretion and stimulated secretion, which is mediated by massive Ca2+ influx induced by exogenous stimuli. This review extends the current understanding of the intestinal mucus barrier, with an emphasis on host defense strategies based on fortification of the mucus layer.
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Affiliation(s)
- Chunyan Song
- Department of Preventive Medicine, Health Science Center, Ningbo University, Zhejiang Key Laboratory of Pathophysiology, Ningbo, Zhejiang, 315211, China
| | - Zhenglong Chai
- Department of Preventive Medicine, Health Science Center, Ningbo University, Zhejiang Key Laboratory of Pathophysiology, Ningbo, Zhejiang, 315211, China
| | - Si Chen
- Department of Preventive Medicine, Health Science Center, Ningbo University, Zhejiang Key Laboratory of Pathophysiology, Ningbo, Zhejiang, 315211, China
| | - Hui Zhang
- Department of Preventive Medicine, Health Science Center, Ningbo University, Zhejiang Key Laboratory of Pathophysiology, Ningbo, Zhejiang, 315211, China
| | - Xiaohong Zhang
- Department of Preventive Medicine, Health Science Center, Ningbo University, Zhejiang Key Laboratory of Pathophysiology, Ningbo, Zhejiang, 315211, China.
- The Affiliated Hospital of Medical School, Ningbo University, Institute of Digestive Disease of Ningbo University, Ningbo, Zhejiang, 315020, China.
| | - Yuping Zhou
- The Affiliated Hospital of Medical School, Ningbo University, Institute of Digestive Disease of Ningbo University, Ningbo, Zhejiang, 315020, China.
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Shi Y, Zhu N, Qiu Y, Tan J, Wang F, Qin L, Dai A. Resistin-like molecules: a marker, mediator and therapeutic target for multiple diseases. Cell Commun Signal 2023; 21:18. [PMID: 36691020 PMCID: PMC9869618 DOI: 10.1186/s12964-022-01032-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 12/27/2022] [Indexed: 01/25/2023] Open
Abstract
Resistin-like molecules (RELMs) are highly cysteine-rich proteins, including RELMα, RELMβ, Resistin, and RELMγ. However, RELMs exhibit significant differences in structure, distribution, and function. The expression of RELMs is regulated by various signaling molecules, such as IL-4, IL-13, and their receptors. In addition, RELMs can mediate numerous signaling pathways, including HMGB1/RAGE, IL-4/IL-4Rα, PI3K/Akt/mTOR signaling pathways, and so on. RELMs proteins are involved in wide range of physiological and pathological processes, including inflammatory response, cell proliferation, glucose metabolism, barrier defense, etc., and participate in the progression of numerous diseases such as lung diseases, intestinal diseases, cardiovascular diseases, and cancers. Meanwhile, RELMs can serve as biomarkers, risk predictors, and therapeutic targets for these diseases. An in-depth understanding of the role of RELMs may provide novel targets or strategies for the treatment and prevention of related diseases. Video abstract.
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Affiliation(s)
- Yaning Shi
- Laboratory of Stem Cell Regulation with Chinese Medicine and its Application, Hunan University of Chinese Medicine, Changsha, 410208, Hunan, China
- Science and Technology Innovation Center, Hunan University of Chinese Medicine, Changsha, 410208, Hunan, China
| | - Neng Zhu
- Department of Urology, The First Hospital of Hunan University of Chinese Medicine, Changsha, 410021, Hunan, China
| | - Yun Qiu
- Laboratory of Stem Cell Regulation with Chinese Medicine and its Application, Hunan University of Chinese Medicine, Changsha, 410208, Hunan, China
| | - Junlan Tan
- Hunan Provincial Key Laboratory of Vascular Biology and Translational Medicine, Changsha, 410208, Hunan, China
| | - Feiying Wang
- Hunan Provincial Key Laboratory of Vascular Biology and Translational Medicine, Changsha, 410208, Hunan, China
| | - Li Qin
- Laboratory of Stem Cell Regulation with Chinese Medicine and its Application, Hunan University of Chinese Medicine, Changsha, 410208, Hunan, China.
- Hunan Provincial Key Laboratory of Vascular Biology and Translational Medicine, Changsha, 410208, Hunan, China.
| | - Aiguo Dai
- Hunan Provincial Key Laboratory of Vascular Biology and Translational Medicine, Changsha, 410208, Hunan, China.
- Department of Respiratory Diseases, Medical School, Hunan University of Chinese Medicine, Changsha, 410208, Hunan, China.
- Department of Respiratory Medicine, First Affiliated Hospital, Hunan University of Chinese Medicine, Changsha, 410021, Hunan, China.
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4
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Cao Q, Mertens RT, Sivanathan KN, Cai X, Xiao P. Macrophage orchestration of epithelial and stromal cell homeostasis in the intestine. J Leukoc Biol 2022; 112:313-331. [PMID: 35593111 PMCID: PMC9543232 DOI: 10.1002/jlb.3ru0322-176r] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 04/29/2022] [Accepted: 05/02/2022] [Indexed: 11/06/2022] Open
Abstract
The intestinal tract is a complex ecosystem where numerous cell types of epithelial, immune, neuronal, and endothelial origin coexist in an intertwined, highly organized manner. The functional equilibrium of the intestine relies heavily on the proper crosstalk and cooperation among each cell population. Furthermore, macrophages are versatile, innate immune cells that participate widely in the modulation of inflammation and tissue remodeling. Emerging evidence suggest that macrophages are central in orchestrating tissue homeostasis. Herein, we describe how macrophages interact with epithelial cells, neurons, and other types of mesenchymal cells under the context of intestinal inflammation, followed by the therapeutic implications of cellular crosstalk pertaining to the treatment of inflammatory bowel disease.
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Affiliation(s)
- Qian Cao
- Department of Gastroenterology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Inflammatory Bowel Disease Center, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Randall Tyler Mertens
- Department of Immunology, Harvard Medical School, Boston, Massachusetts, USA.,Evergrande Center for Immunologic Diseases, Harvard Medical School and Brigham and Women's Hospital, Boston, Massachusetts, USA
| | - Kisha Nandini Sivanathan
- Department of Immunology, Harvard Medical School, Boston, Massachusetts, USA.,Evergrande Center for Immunologic Diseases, Harvard Medical School and Brigham and Women's Hospital, Boston, Massachusetts, USA
| | - Xuechun Cai
- Department of Gastroenterology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Inflammatory Bowel Disease Center, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Peng Xiao
- Department of Gastroenterology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Inflammatory Bowel Disease Center, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Department of Immunology, Harvard Medical School, Boston, Massachusetts, USA.,Evergrande Center for Immunologic Diseases, Harvard Medical School and Brigham and Women's Hospital, Boston, Massachusetts, USA.,The Key Laboratory for Immunity and Inflammatory Diseases of Zhejiang Province, Hangzhou, China.,Institute of Immunology, Zhejiang University School of Medicine, Hangzhou, China
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5
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Liu XC, Guo L, Ling KR, Hu XY, Shen YJ, Li LQ. Serum Relmβ combined with abdominal signs may predict surgical timing in neonates with NEC: A cohort study. Front Pediatr 2022; 10:943320. [PMID: 36147817 PMCID: PMC9485553 DOI: 10.3389/fped.2022.943320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 08/18/2022] [Indexed: 11/13/2022] Open
Abstract
AIMS To examine the predictive value of serum biomarkers combined with other indicators for necrotizing enterocolitis (NEC) surgery decision-making. METHODS Clinical data, including baseline information, clinical features, imaging presentation and serum assessment, of the infants enrolled were collected, and the serum concentrations of HBD2, HMGB-1, Claudin-3 and Relmβ were determined. Student's t test, the Mann-Whitney U test, the chi-square test and logistic regression analysis were used. Receiver operating characteristic (ROC) curves were also generated. RESULTS Forty-nine infants were enrolled, with 23 in the surgical NEC group and 26 in the medical NEC group. There were no differences in the baseline clinical information, including birth weight, gestational age, admission age and risk factors, during pregnancy and before enrollment (P > 0.05). Peritonitis, intestinal adhesion and sepsis were more common in the surgical group (P < 0.05). The incidences of abdominal distention, abdominal wall tenseness, abdominal tenderness and absent bowel sounds in the surgical group were significantly higher when NEC occurred (P < 0.05). There were no differences between the two groups in the imaging presentation (P > 0.05). The concentration of Relmβ {[8.66 (4.29, 19.28) vs. 20.65 (9.51, 44.65)]} in the surgical group was significantly higher (P < 0.05). Abdominal wall tenseness, abdominal tenderness and a Relmβ concentration > 19.7 μmol/L were included in the predictive model, and the AUC of the predictive score was 0.943 (95% CI: 0.891-1.000) (P < 0.05). CONCLUSION Serum Relmβ concentration combined with abdominal wall tenseness and abdominal tenderness may be useful in determining surgical timing in neonates with NEC.
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Affiliation(s)
- Xiao-Chen Liu
- Neonatal Diagnosis and Treatment Centre of Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Lu Guo
- Neonatal Diagnosis and Treatment Centre of Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Ke-Ran Ling
- Neonatal Diagnosis and Treatment Centre of Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Xiao-Yu Hu
- Neonatal Diagnosis and Treatment Centre of Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Yu-Jie Shen
- Neonatal Diagnosis and Treatment Centre of Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Lu-Quan Li
- Neonatal Diagnosis and Treatment Centre of Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
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6
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Liu XC, Li LQ, Ling KR, Guo L, Hu XY, Li C. Fecal HBD-2 and Claudin-3 may be potential biomarkers to predict the deterioration of necrotizing enterocolitis: A prospective study. Front Pediatr 2022; 10:1062798. [PMID: 36582510 PMCID: PMC9794018 DOI: 10.3389/fped.2022.1062798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 11/11/2022] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND AND PURPOSE Necrotizing enterocolitis (NEC) is a critical gastrointestinal disease. We aim to explore the value of fecal human β-defensin 2 (HBD-2), Claudin-3, high-mobility group box-1 protein (HMGB-1), and resistin-like molecule β (Relmβ) as well as some laboratory metrics to predict the deterioration of NEC. METHODS Infants diagnosed with NEC at Stage II were enrolled in our study. Those who progressed to Stage III were included in the Stage III group and the rest were included in the Stage II group. Clinical data and laboratory metrics of the infants were collected. Fecal samples of HBD2, HMGB-1, Claudin-3, and Relmβ collected during their enrollment were determined by using enzyme-linked immunosorbent assay (ELISA) kits. Student's t-test, the Mann-Whitney U test, the chi-square test, receiver operating characteristic (ROC), and logistic regression analysis were performed. RESULTS Sixty infants diagnosed with NEC at Stage II were enrolled in our study, with 27 in the Stage III group (n = 27) and 33 in the Stage II group (n = 33). Although many of these NEC cases were late preterm and term infants, the infants in the Stage III group had a lower gestational age (P < 0.05). The incidence of gestational diabetes mellitus, peritonitis, intestinal adhesion, and sepsis was higher and more infants in the Stage III group underwent surgeries (P < 0.05). The levels of HBD-2 and Claudin-3 were higher and neutrophil count was lower in the Stage III group than in the Stage II Group, and the area under the curve (AUC) was 0.754, 0,755, and 0.666, respectively (P < 0.05). HBD-2 ≥ 1649.02 ng/g and Claudin-3 ≥ 2488.71 pg/g were included in the multivariate stepwise logistic regression analysis (P < 0.05), and the AUC of the model was 0.805 (95% CI: 0.688-0.922). CONCLUSION Fecal HBD-2 and Claudin-3 may be potential biomarkers to predict the deterioration of NEC from Stage II to Stage III.
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Affiliation(s)
- Xiao-Chen Liu
- Neonatal Diagnosis and Treatment Centre of Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Lu-Quan Li
- Neonatal Diagnosis and Treatment Centre of Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Ke-Ran Ling
- Neonatal Diagnosis and Treatment Centre of Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Lu Guo
- Neonatal Diagnosis and Treatment Centre of Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Xiao-Yu Hu
- Neonatal Diagnosis and Treatment Centre of Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Chun Li
- Neonatal Diagnosis and Treatment Centre of Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
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The link “Cancer and autoimmune diseases” in the light of microbiota: Evidence of a potential culprit. Immunol Lett 2020; 222:12-28. [DOI: 10.1016/j.imlet.2020.03.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 02/20/2020] [Accepted: 03/03/2020] [Indexed: 12/15/2022]
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Red lentil supplementation reduces the severity of dextran sodium sulfate-induced colitis in C57BL/6 male mice. J Funct Foods 2020. [DOI: 10.1016/j.jff.2019.103625] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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Abstract
Flavin-containing monooxygenases (FMOs) catalyze the oxygenation of numerous foreign chemicals. This review considers the roles of FMOs in the metabolism of endogenous substrates and in physiological processes, and focuses on FMOs of human and mouse. Tyramine, phenethylamine, trimethylamine, cysteamine, methionine, lipoic acid and lipoamide have been identified as endogenous or dietary-derived substrates of FMOs in vitro. However, with the exception of trimethylamine, the role of FMOs in the metabolism of these compounds in vivo is unclear. The use, as experimental models, of knockout-mouse lines deficient in various Fmo genes has revealed previously unsuspected roles for FMOs in endogenous metabolic processes. FMO1 has been identified as a novel regulator of energy balance that acts to promote metabolic efficiency, and also as being involved in the biosynthesis of taurine, by catalyzing the S-oxygenation of hypotaurine. FMO5 has been identified as a regulator of metabolic ageing and glucose homeostasis that apparently acts by sensing or responding to gut bacteria. Thus, FMOs do not function only as xenobiotic-metabolizing enzymes and there is a risk that exposure to drugs and environmental chemicals that are substrates or inducers of FMOs would perturb the endogenous functions of these enzymes.
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Luo J, Li HP, Xu F, Wu BQ, Lin HC. Early diagnosis of necrotizing enterocolitis by plasma RELMβ and thrombocytopenia in preterm infants: A pilot study. Pediatr Neonatol 2019; 60:447-452. [PMID: 30799148 DOI: 10.1016/j.pedneo.2019.01.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 11/20/2018] [Accepted: 01/15/2019] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND As the inflammatory regulators, Resistin-like molecule β (RELMβ) and Resistin might be potential biomarkers of necrotizing enterocolitis (NEC), while thrombocytopenia is often related to the severity of NEC, clinical observation suggests that thrombocytopenia might be an early biomarker of NEC. The aim of this study was to evaluate whether RELMβ, Resistin and thrombocytopenia could be biomarkers for early diagnosis of NEC in preterm infants. METHODS From January 2016 to March 2018, twenty-nine NEC preterm infants who were diagnosed with NEC (Bell's stage ≥Ⅱ) by two independent neonatologists and twenty-nine non NEC preterm infants at neonatal intensive care unit in our hospital were enrolled in this case-control study. Preterm infants with a history of serious infections (sepsis, pneumonia), asphyxia, and congenital malformations were excluded from the study. The plasma RELMβ and Resistin were evaluated by enzyme linked immunosorbent assay (ELISA) and serum platelet levels were measured directly by ordinary light microscope at the diagnosis of NEC (Bell's stage ≥Ⅱ). RESULTS Plasma RELMβ levels in NEC group were significantly higher than control group (P < 0.05). The optimal cut-off value of RELMβ determined by receiver operating characteristic curve (ROC) was 378.3 ng/L. The overall estimates for sensitivity and specificity of high RELMβ concentrations in the detection of neonatal NEC were 71.4% and 91.7%, respectively. No significant difference was found in plasma Resistin levels between two groups (P > 0.05). If platelet level was less than 157 × 109/L, the sensitivity and specificity were 69.34% and 82.87%, respectively. Interestingly, the combination of RELMβ and thrombocytopenia increased sensitivity and specificity to 82.89% and 93.21%, respectively. CONCLUSION The combination of RELMβ and thrombocytopenia was a reliable biomarker for the early diagnosis of NEC in this study with 82.89% sensitivity and 93.21% specificity, respectively.
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Affiliation(s)
- Jun Luo
- Department of Neonatology, Bao'an Maternal and Child Health Hospital of Shenzhen, Jinan University, Guangdong, China
| | - Hong Ping Li
- Department of Neonatology, Shenzhen Children's Hospital, Shenzhen, China
| | - Fen Xu
- Department of Neonatology, Bao'an Maternal and Child Health Hospital of Shenzhen, Jinan University, Guangdong, China
| | - Ben Qing Wu
- Department of Neonatology, Guangming People's Hospital of Shenzhen, China
| | - Hung Chih Lin
- Department of Neonatology, China Medical University Children's Hospital, Taichung, Taiwan; School of Chinese Medicine, China Medical University, Taichung, Taiwan; Asia University Hospital, Asia University, Taichung, Taiwan.
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Abstract
Inflammatory bowel diseases (IBDs), represented by Crohn disease and ulcerative colitis, are associated with major morbidity in Western countries and with increasing incidence in the developing world. Although analysis of the genome of patients with IBD, especially through genome-wide association studies, has unraveled multiple pathways involved in IBD pathogenesis, only part of IBD heritability has been explained by genetic studies. This finding has revealed that environmental factors also play a major role in promoting intestinal inflammation, mostly through their effects in the composition of the microbiome. However, in order for microbial dysbiosis to result in uncontrolled intestinal inflammation, the intestinal barrier formed by intestinal epithelial cells and the innate immune system should also be compromised. Finally, activation of the immune system depends on the working balance between effector and regulatory cells present in the intestinal mucosa, which have also been found to be dysregulated in this patient population. Therefore, IBD pathogenesis is a result of the interplay of genetic susceptibility and environmental impact on the microbiome that through a weakened intestinal barrier will lead to inappropriate intestinal immune activation. In this article, we will review the mechanisms proposed to cause IBD from the genetic, environmental, intestinal barrier, and immunologic perspectives.
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Roles of Gut-Derived Secretory Factors in the Pathogenesis of Non-Alcoholic Fatty Liver Disease and Their Possible Clinical Applications. Int J Mol Sci 2018; 19:ijms19103064. [PMID: 30297626 PMCID: PMC6213237 DOI: 10.3390/ijms19103064] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 10/01/2018] [Accepted: 10/06/2018] [Indexed: 02/06/2023] Open
Abstract
The rising prevalence of non-alcoholic fatty liver disease (NAFLD) parallels the global increase in the number of people diagnosed with obesity and metabolic syndrome. The gut-liver axis (GLA) plays an important role in the pathogenesis of NAFLD/non-alcoholic steatohepatitis (NASH). In this review, we discuss the clinical significance and underlying mechanisms of action of gut-derived secretory factors in NAFLD/NASH, focusing on recent human studies. Several studies have identified potential causal associations between gut-derived secretory factors and NAFLD/NASH, as well as the underlying mechanisms. The effects of gut-derived hormone-associated drugs, such as glucagon-like peptide-1 analog and recombinant variant of fibroblast growth factor 19, and other new treatment strategies for NAFLD/NASH have also been reported. A growing body of evidence highlights the role of GLA in the pathogenesis of NAFLD/NASH. Larger and longitudinal studies as well as translational research are expected to provide additional insights into the role of gut-derived secretory factors in the pathogenesis of NAFLD/NASH, possibly providing novel markers and therapeutic targets in patients with NAFLD/NASH.
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Monk JM, Wu W, McGillis LH, Wellings HR, Hutchinson AL, Liddle DM, Graf D, Robinson LE, Power KA. Chickpea supplementation prior to colitis onset reduces inflammation in dextran sodium sulfate-treated C57Bl/6 male mice. Appl Physiol Nutr Metab 2018; 43:893-901. [PMID: 29522694 DOI: 10.1139/apnm-2017-0689] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The potential for a chickpea-supplemented diet (rich in fermentable nondigestible carbohydrates and phenolic compounds) to modify the colonic microenvironment and attenuate the severity of acute colonic inflammation was investigated. C57Bl/6 male mice were fed a control basal diet or basal diet supplemented with 20% cooked chickpea flour for 3 weeks prior to acute colitis onset induced by 7-day exposure to dextran sodium sulfate (DSS; 2% w/v in drinking water) and colon and serum levels of inflammatory mediators were assessed. Despite an equal degree of DSS-induced epithelial barrier histological damage and clinical symptoms between dietary groups, biomarkers of the ensuing inflammatory response were attenuated by chickpea pre-feeding, including reduced colon tissue activation of nuclear factor kappa B and inflammatory cytokine production (tumor necrosis factor alpha and interleukin (IL)-18). Additionally, colon protein expression of anti-inflammatory (IL-10) and epithelial repair (IL-22 and IL-27) cytokines were increased by chickpea pre-feeding. Furthermore, during acute colitis, chickpea pre-feeding increased markers of enhanced colonic function, including Relmβ and IgA gene expression. Collectively, chickpea pre-feeding modulated the baseline function of the colonic microenvironment, whereby upon induction of acute colitis, the severity of the inflammatory response was attenuated.
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Affiliation(s)
- Jennifer M Monk
- a Guelph Research and Development Centre, Agriculture and Agri-Food Canada, Guelph, ON N1G 5C9, Canada
- b Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Wenqing Wu
- a Guelph Research and Development Centre, Agriculture and Agri-Food Canada, Guelph, ON N1G 5C9, Canada
| | - Laurel H McGillis
- b Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Hannah R Wellings
- b Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Amber L Hutchinson
- b Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Danyelle M Liddle
- b Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Daniela Graf
- a Guelph Research and Development Centre, Agriculture and Agri-Food Canada, Guelph, ON N1G 5C9, Canada
- b Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Lindsay E Robinson
- b Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Krista A Power
- a Guelph Research and Development Centre, Agriculture and Agri-Food Canada, Guelph, ON N1G 5C9, Canada
- b Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON N1G 2W1, Canada
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Chronic features of allergic asthma are enhanced in the absence of resistin-like molecule-beta. Sci Rep 2018; 8:7061. [PMID: 29728628 PMCID: PMC5935686 DOI: 10.1038/s41598-018-25321-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Accepted: 04/19/2018] [Indexed: 02/07/2023] Open
Abstract
Asthma is characterized by inflammation and architectural changes in the lungs. A number of immune cells and mediators are recognized as initiators of asthma, although therapeutics based on these are not always effective. The multifaceted nature of this syndrome necessitate continued exploration of immunomodulators that may play a role in pathogenesis. We investigated the role of resistin-like molecule-beta (RELM-β), a gut antibacterial, in the development and pathogenesis of Aspergillus-induced allergic airways disease. Age and gender matched C57BL/6J and Retnlb−/− mice rendered allergic to Aspergillus fumigatus were used to measure canonical markers of allergic asthma at early and late time points. Inflammatory cells in airways were similar, although Retnlb−/− mice had reduced tissue inflammation. The absence of RELM-β elevated serum IgA and pro-inflammatory cytokines in the lungs at homeostasis. Markers of chronic disease including goblet cell numbers, Muc genes, airway wall remodelling, and hyperresponsiveness were greater in the absence RELM-β. Specific inflammatory mediators important in antimicrobial defence in allergic asthma were also increased in the absence of RELM-β. These data suggest that while characteristics of allergic asthma develop in the absence of RELM-β, that RELM-β may reduce the development of chronic markers of allergic airways disease.
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15
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Allaire JM, Morampudi V, Crowley SM, Stahl M, Yu H, Bhullar K, Knodler LA, Bressler B, Jacobson K, Vallance BA. Frontline defenders: goblet cell mediators dictate host-microbe interactions in the intestinal tract during health and disease. Am J Physiol Gastrointest Liver Physiol 2018; 314:G360-G377. [PMID: 29122749 PMCID: PMC5899238 DOI: 10.1152/ajpgi.00181.2017] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Goblet cells (GCs) are the predominant secretory epithelial cells lining the luminal surface of the mammalian gastrointestinal (GI) tract. Best known for their apical release of mucin 2 (Muc2), which is critical for the formation of the intestinal mucus barrier, GCs have often been overlooked for their active contributions to intestinal protection and host defense. In part, this oversight reflects the limited tools available to study their function but also because GCs have long been viewed as relatively passive players in promoting intestinal homeostasis and host defense. In light of recent studies, this perspective has shifted, as current evidence suggests that Muc2 as well as other GC mediators are actively released into the lumen to defend the host when the GI tract is challenged by noxious stimuli. The ability of GCs to sense and respond to danger signals, such as bacterial pathogens, has recently been linked to inflammasome signaling, potentially intrinsic to the GCs themselves. Moreover, further work suggests that GCs release Muc2, as well as other mediators, to modulate the composition of the gut microbiome, leading to both the expansion as well as the depletion of specific gut microbes. This review will focus on the mechanisms by which GCs actively defend the host from noxious stimuli, as well as describe advanced technologies and new approaches by which their responses can be addressed. Taken together, we will highlight current insights into this understudied, yet critical, aspect of intestinal mucosal protection and its role in promoting gut defense and homeostasis.
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Affiliation(s)
- Joannie M. Allaire
- 1Division of Gastroenterology, Department of Pediatrics, BC Children’s Hospital Research Institute, University of British Columbia, Vancouver, British Columbia, Canada
| | - Vijay Morampudi
- 1Division of Gastroenterology, Department of Pediatrics, BC Children’s Hospital Research Institute, University of British Columbia, Vancouver, British Columbia, Canada
| | - Shauna M. Crowley
- 1Division of Gastroenterology, Department of Pediatrics, BC Children’s Hospital Research Institute, University of British Columbia, Vancouver, British Columbia, Canada
| | - Martin Stahl
- 1Division of Gastroenterology, Department of Pediatrics, BC Children’s Hospital Research Institute, University of British Columbia, Vancouver, British Columbia, Canada
| | - Hongbing Yu
- 1Division of Gastroenterology, Department of Pediatrics, BC Children’s Hospital Research Institute, University of British Columbia, Vancouver, British Columbia, Canada
| | - Kirandeep Bhullar
- 1Division of Gastroenterology, Department of Pediatrics, BC Children’s Hospital Research Institute, University of British Columbia, Vancouver, British Columbia, Canada
| | - Leigh A. Knodler
- 2Paul G. Allen School for Global Animal Health, College of Veterinary Medicine, Washington State University, Pullman, Washington
| | - Brian Bressler
- 3Division of Gastroenterology, Department of Medicine, St. Paul’s Hospital, University of British Columbia, Vancouver, British Columbia, Canada
| | - Kevan Jacobson
- 1Division of Gastroenterology, Department of Pediatrics, BC Children’s Hospital Research Institute, University of British Columbia, Vancouver, British Columbia, Canada
| | - Bruce A. Vallance
- 1Division of Gastroenterology, Department of Pediatrics, BC Children’s Hospital Research Institute, University of British Columbia, Vancouver, British Columbia, Canada
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Navy and black bean supplementation attenuates colitis-associated inflammation and colonic epithelial damage. J Nutr Biochem 2018; 56:215-223. [PMID: 29631142 DOI: 10.1016/j.jnutbio.2018.02.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Revised: 01/15/2018] [Accepted: 02/21/2018] [Indexed: 12/15/2022]
Abstract
The enriched levels of nondigestible fermentable carbohydrates and phenolic compounds found in common beans can exert immunomodulatory effects within the colon that improve gut health and mitigate the severity of colitis-associated inflammatory pathology. Prior to acute colitis onset, C57Bl/6 mice were prefed isocaloric 20% cooked navy bean (NB) or black bean (BB) diets for 3 weeks and switched to control basal diet (BD) 24 h prior to colitis induction via 5-day exposure to dextran sodium sulfate (2% w/v in drinking water)+3 days of fresh water. The severity of the acute colitis phenotype was attenuated by bean prefeeding, evidenced by reduced colon tissue inflammatory transcription factor activation (NFκB, STAT3) and inflammatory mediator levels in the colon (IL-1β, IL-6, IL-18 and MCP-1) and serum (TNFα, IL-6, IL-1β, MCP-1) versus BD (P≤.05). Additionally, biomarkers of enhanced wound repair responses were increased by bean prefeeding including colon tissue protein levels of IL-22, IL-27 and activated (i.e., GTP-bound) Cdc42 and Rac1 versus BD (P≤.05). mRNA expressions of genes involved in normal colonic epithelial function and the promotion of epithelial barrier integrity, defense and/or restitution and wound closure including MUC1, RELMβ, IgA and REG3γ were all increased in NB and BB prefed mice versus BD (P≤.05). Collectively, bean supplementation prior to colitis induction (i.e., mimicking disease relapse) primes the colonic microenvironment to attenuate the severity of the colitis inflammatory phenotype and maintain aspects of epithelial barrier function.
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Monk JM, Lepp D, Wu W, Graf D, McGillis LH, Hussain A, Carey C, Robinson LE, Liu R, Tsao R, Brummer Y, Tosh SM, Power KA. Chickpea-supplemented diet alters the gut microbiome and enhances gut barrier integrity in C57Bl/6 male mice. J Funct Foods 2017. [DOI: 10.1016/j.jff.2017.02.002] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
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18
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Meng X, Zhang K, Kong J, Xu L, An G, Qin W, Li J, Zhang Y. Deletion of resistin-like molecule-beta attenuates angiotensin II-induced abdominal aortic aneurysm. Oncotarget 2017; 8:104171-104181. [PMID: 29262630 PMCID: PMC5732796 DOI: 10.18632/oncotarget.22042] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Accepted: 10/03/2017] [Indexed: 11/25/2022] Open
Abstract
In the present study, we want to test whether deletion of resistin-like molecule-beta (RELMβ) attenuates angiotensin II (Ang II)-induced formation of abdominal aortic aneurysm (AAA). RELMβ gene expression was inhibited by siRNA both in vivo and in vitro. Apolipoprotein E-knockout (ApoE−/−) mice were randomly divided into saline, Ang II, siRNA negative control (si-NC) and siRNA RELMβ (si-RELMβ) groups (n=15 each), and mice in the last three groups underwent Ang II infusion for 4 weeks to induce AAA. RELMβ gene deficiency significantly decreased AAA incidence and severity, which was associated with reduced macrophage accumulation and decreased expression of proinflammatory cytokines (monocyte chemoattractant protein 1 and interleukin 6), matrix metalloproteinase 2 (MMP-2) and MMP-9 in the aortic wall. In cultured macrophages, RELMβ deficiency blunted the response of macrophages to Ang II and downregulated the levels of proinflammatory cytokines, MMP-2 and MMP-9. Recombinant RELMβ promoted the secretion of proinflammatory cytokines, MMP-2 and MMP-9 in macrophages and activated extracellular signal-regulated kinase 1/2 (ERK1/2) and c-Jun N-terminal kinase (JNK) signaling, which was reversed with pretreatment with inhibitors of ERK1/2 and JNK. Deletion of RELMβ attenuated Ang II-induced AAA formation in ApoE−/− mice. The inherent mechanism may involve the reduced expression of proinflammatory cytokines, MMP-2 and MMP-9, which was mediated by ERK1/2 and JNK activation. Therefore, inhibiting RELMβ secretion may be a novel approach for anti-aneurysm treatment.
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Affiliation(s)
- Xiao Meng
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, Qilu Hospital, Shandong University, Jinan, 250012, China
| | - Kai Zhang
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, Qilu Hospital, Shandong University, Jinan, 250012, China
| | - Jing Kong
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, Qilu Hospital, Shandong University, Jinan, 250012, China
| | - Long Xu
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, Qilu Hospital, Shandong University, Jinan, 250012, China
| | - Guipeng An
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, Qilu Hospital, Shandong University, Jinan, 250012, China
| | - Weidong Qin
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, Qilu Hospital, Shandong University, Jinan, 250012, China
| | - Jifu Li
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, Qilu Hospital, Shandong University, Jinan, 250012, China
| | - Yun Zhang
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, Qilu Hospital, Shandong University, Jinan, 250012, China
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Monk JM, Lepp D, Wu W, Pauls KP, Robinson LE, Power KA. Navy and black bean supplementation primes the colonic mucosal microenvironment to improve gut health. J Nutr Biochem 2017; 49:89-100. [PMID: 28915390 DOI: 10.1016/j.jnutbio.2017.08.002] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 07/07/2017] [Accepted: 08/07/2017] [Indexed: 02/06/2023]
Abstract
Common beans (Phaseolus vulgaris L.) are enriched in non-digestible fermentable carbohydrates and phenolic compounds that can modulate the colonic microenvironment (microbiota and host epithelial barrier) to improve gut health. In a comprehensive assessment of the impact of two commonly consumed bean varieties (differing in levels and types of phenolic compounds) within the colonic microenvironment, C57Bl/6 mice were fed diets supplemented with 20% cooked navy bean (NB) or black bean (BB) flours or an isocaloric basal diet control (BD) for 3 weeks. NB and BB similarly altered the fecal microbiota community structure (16S rRNA sequencing) notably by increasing the abundance of carbohydrate fermenting bacteria such as Prevotella, S24-7 and Ruminococcus flavefaciens, which coincided with enhanced short chain fatty acid (SCFA) production (microbial-derived carbohydrate fermentation products) and colonic expression of the SCFA receptors GPR-41/-43/-109a. Both NB and BB enhanced multiple aspects of mucus and epithelial barrier integrity vs. BD including: (i) goblet cell number, crypt mucus content and mucin mRNA expression, (ii) anti-microbial defenses (Reg3γ), (iii) crypt length and epithelial cell proliferation, (iv) apical junctional complex components (occludin, JAM-A, ZO-1 and E-cadherin) mRNA expression and (v) reduced serum endotoxin concentrations. Interestingly, biomarkers of colon barrier integrity (crypt height, mucus content, cell proliferation and goblet cell number) were enhanced in BB vs. NB-fed mice, suggesting added benefits attributable to unique BB components (e.g., phenolics). Overall, NB and BB improved baseline colonic microenvironment function by altering the microbial community structure and activity and promoting colon barrier integrity and function; effects which may prove beneficial in attenuating gut-associated diseases.
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Affiliation(s)
- Jennifer M Monk
- Guelph Research and Development Centre, Agriculture and Agri-Food Canada, Guelph, ON, Canada, N1G 5C9; Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada, N1G 2W1
| | - Dion Lepp
- Guelph Research and Development Centre, Agriculture and Agri-Food Canada, Guelph, ON, Canada, N1G 5C9
| | - Wenqing Wu
- Guelph Research and Development Centre, Agriculture and Agri-Food Canada, Guelph, ON, Canada, N1G 5C9
| | - K Peter Pauls
- Department of Plant Agriculture, University of Guelph, Guelph, ON, Canada, N1G 2W1
| | - Lindsay E Robinson
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada, N1G 2W1
| | - Krista A Power
- Guelph Research and Development Centre, Agriculture and Agri-Food Canada, Guelph, ON, Canada, N1G 5C9; Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada, N1G 2W1.
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20
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Hosoya A, Takahama A, Nakamura H. Localization of RELM-β/FIZZ2 Is Associated with Cementum Formation. Anat Rec (Hoboken) 2017; 300:1865-1874. [PMID: 28681425 DOI: 10.1002/ar.23636] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 01/16/2017] [Accepted: 01/27/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Akihiro Hosoya
- Department of Oral Histology; Matsumoto Dental University; Nagano Japan
| | - Akira Takahama
- Department of Oral Histology; Matsumoto Dental University; Nagano Japan
| | - Hiroaki Nakamura
- Department of Oral Histology; Matsumoto Dental University; Nagano Japan
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21
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Scott F, Gonzalez Malagon SG, O'Brien BA, Fennema D, Veeravalli S, Coveney CR, Phillips IR, Shephard EA. Identification of Flavin-Containing Monooxygenase 5 (FMO5) as a Regulator of Glucose Homeostasis and a Potential Sensor of Gut Bacteria. Drug Metab Dispos 2017. [PMID: 28646079 PMCID: PMC5539585 DOI: 10.1124/dmd.117.076612] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
We have previously identified flavin-containing monooxygenase 5 (FMO5) as a regulator of metabolic aging. The aim of the present study was to investigate the role of FMO5 in glucose homeostasis and the impact of diet and gut flora on the phenotype of mice in which the Fmo5 gene has been disrupted (Fmo5−/− mice). In comparison with wild-type (WT) counterparts, Fmo5−/− mice are resistant to age-related changes in glucose homeostasis and maintain the higher glucose tolerance and insulin sensitivity characteristic of young animals. When fed a high-fat diet, they are protected against weight gain and reduction of insulin sensitivity. The phenotype of Fmo5−/− mice is independent of diet and the gut microbiome and is determined solely by the host genotype. Fmo5−/− mice have metabolic characteristics similar to those of germ-free mice, indicating that FMO5 plays a role in sensing or responding to gut bacteria. In WT mice, FMO5 is present in the mucosal epithelium of the gastrointestinal tract where it is induced in response to a high-fat diet. In comparison with WT mice, Fmo5−/− mice have fewer colonic goblet cells, and they differ in the production of the colonic hormone resistin-like molecule β. Fmo5−/− mice have lower concentrations of tumor necrosis factor α in plasma and of complement component 3 in epididymal white adipose tissue, indicative of improved inflammatory tone. Our results implicate FMO5 as a regulator of body weight and of glucose disposal and insulin sensitivity and, thus, identify FMO5 as a potential novel therapeutic target for obesity and insulin resistance.
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Affiliation(s)
- Flora Scott
- Institute of Structural and Molecular Biology, University College London, London, United Kingdom (F.S., S.G.G.M., B.A.O., D.F., S.V., C.R.C., I.R.P., E.A.S.); and School of Biological and Chemical Sciences, Queen Mary University of London, London, United Kingdom (I.R.P.)
| | - Sandra G Gonzalez Malagon
- Institute of Structural and Molecular Biology, University College London, London, United Kingdom (F.S., S.G.G.M., B.A.O., D.F., S.V., C.R.C., I.R.P., E.A.S.); and School of Biological and Chemical Sciences, Queen Mary University of London, London, United Kingdom (I.R.P.)
| | - Brett A O'Brien
- Institute of Structural and Molecular Biology, University College London, London, United Kingdom (F.S., S.G.G.M., B.A.O., D.F., S.V., C.R.C., I.R.P., E.A.S.); and School of Biological and Chemical Sciences, Queen Mary University of London, London, United Kingdom (I.R.P.)
| | - Diede Fennema
- Institute of Structural and Molecular Biology, University College London, London, United Kingdom (F.S., S.G.G.M., B.A.O., D.F., S.V., C.R.C., I.R.P., E.A.S.); and School of Biological and Chemical Sciences, Queen Mary University of London, London, United Kingdom (I.R.P.)
| | - Sunil Veeravalli
- Institute of Structural and Molecular Biology, University College London, London, United Kingdom (F.S., S.G.G.M., B.A.O., D.F., S.V., C.R.C., I.R.P., E.A.S.); and School of Biological and Chemical Sciences, Queen Mary University of London, London, United Kingdom (I.R.P.)
| | - Clarissa R Coveney
- Institute of Structural and Molecular Biology, University College London, London, United Kingdom (F.S., S.G.G.M., B.A.O., D.F., S.V., C.R.C., I.R.P., E.A.S.); and School of Biological and Chemical Sciences, Queen Mary University of London, London, United Kingdom (I.R.P.)
| | - Ian R Phillips
- Institute of Structural and Molecular Biology, University College London, London, United Kingdom (F.S., S.G.G.M., B.A.O., D.F., S.V., C.R.C., I.R.P., E.A.S.); and School of Biological and Chemical Sciences, Queen Mary University of London, London, United Kingdom (I.R.P.)
| | - Elizabeth A Shephard
- Institute of Structural and Molecular Biology, University College London, London, United Kingdom (F.S., S.G.G.M., B.A.O., D.F., S.V., C.R.C., I.R.P., E.A.S.); and School of Biological and Chemical Sciences, Queen Mary University of London, London, United Kingdom (I.R.P.)
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22
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Briggs N, Weatherhead J, Sastry KJ, Hotez PJ. The Hygiene Hypothesis and Its Inconvenient Truths about Helminth Infections. PLoS Negl Trop Dis 2016; 10:e0004944. [PMID: 27632204 PMCID: PMC5025185 DOI: 10.1371/journal.pntd.0004944] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Current iterations of the hygiene hypothesis suggest an adaptive role for helminth parasites in shaping the proper maturation of the immune system. However, aspects of this hypothesis are based on assumptions that may not fully account for realities about human helminth infections. Such realities include evidence of causal associations between helminth infections and asthma or inflammatory bowel disease as well as the fact that helminth infections remain widespread in the United States, especially among populations at greatest risk for inflammatory and autoimmune diseases.
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Affiliation(s)
- Neima Briggs
- Department of Immunology, University of Texas M.D. Anderson Cancer Center, Houston, Texas, United States of America
- The University of Texas Graduate School of Biomedical Sciences at Houston, Houston, Texas, United States of America
- Sabin Vaccine Institute and Texas Children’s Hospital Center for Vaccine Development, Departments of Pediatrics and Molecular Virology and Microbiology, National School of Tropical Medicine, Baylor College of Medicine, Houston, Texas, United States of America
| | - Jill Weatherhead
- Sabin Vaccine Institute and Texas Children’s Hospital Center for Vaccine Development, Departments of Pediatrics and Molecular Virology and Microbiology, National School of Tropical Medicine, Baylor College of Medicine, Houston, Texas, United States of America
| | - K. Jagannadha Sastry
- Department of Immunology, University of Texas M.D. Anderson Cancer Center, Houston, Texas, United States of America
- The University of Texas Graduate School of Biomedical Sciences at Houston, Houston, Texas, United States of America
| | - Peter J. Hotez
- Sabin Vaccine Institute and Texas Children’s Hospital Center for Vaccine Development, Departments of Pediatrics and Molecular Virology and Microbiology, National School of Tropical Medicine, Baylor College of Medicine, Houston, Texas, United States of America
- James A Baker III Institute for Public Policy, Rice University, Houston, Texas, United States of America
- Department of Biology, Baylor University, Waco, Texas, United States of America
- Scowcroft Institute of International Affairs, Bush School of Government and Public Service, Texas A&M University, College Station, Texas, United States of America
- * E-mail:
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The goblet cell-derived mediator RELM-β drives spontaneous colitis in Muc2-deficient mice by promoting commensal microbial dysbiosis. Mucosal Immunol 2016; 9:1218-33. [PMID: 26813339 DOI: 10.1038/mi.2015.140] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Accepted: 12/13/2015] [Indexed: 02/04/2023]
Abstract
Intestinal goblet cells are potentially key players in controlling susceptibility to ulcerative colitis (UC). Although impaired mucin (Muc2) production by goblet cells increases microbial stimulation of the colonic mucosa, goblet cells secrete other mediators that may influence or promote UC development. Correspondingly, Muc2-deficient ((-/-)) mice develop spontaneous colitis, concurrent with the dramatic upregulation of the goblet cell mediator, resistin-like molecule-beta (RELM-β). Testing RELM-β's role, we generated Muc2(-/-)/Retnlb(-/-) mice, finding that RELM-β deficiency significantly attenuated colitis development and symptoms compared with Muc2(-/-) mice. RELM-β expression in Muc2(-/-) mice strongly induced the production/secretion of the antimicrobial lectin RegIIIβ, that exerted its microbicidal effect predominantly on Gram-positive Lactobacillus species. Compared with Muc2(-/-)/Retnlb(-/-) mice, this worsened intestinal microbial dysbiosis with a selective loss of colonic Lactobacilli spp. in Muc2(-/-) mice. Orally replenishing Muc2(-/-) mice with murine Lactobacillus spp., but not with a probiotic formulation containing several human Lactobacillus spp. (VSL#3), ameliorated their spontaneous colitis in concert with increased production of short-chain fatty acids. These studies demonstrate that the goblet cell mediator RELM-β drives colitis in Muc2(-/-) mice by depleting protective commensal microbes. The ability of selective commensal microbial replacement to ameliorate colitis suggests that personalized bacterial therapy may prove beneficial for treatment of UC.
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Pathological Type-2 Immune Response, Enhanced Tumor Growth, and Glucose Intolerance in Retnlβ (RELMβ) Null Mice: A Model of Intestinal Immune System Dysfunction in Disease Susceptibility. THE AMERICAN JOURNAL OF PATHOLOGY 2016; 186:2404-16. [PMID: 27397737 DOI: 10.1016/j.ajpath.2016.04.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Revised: 04/07/2016] [Accepted: 04/26/2016] [Indexed: 01/22/2023]
Abstract
Resistin, and its closely related homologs, the resistin-like molecules (RELMs) have been implicated in metabolic dysregulation, inflammation, and cancer. Specifically, RELMβ, expressed predominantly in the goblet cells in the colon, is released both apically and basolaterally, and is hence found in both the intestinal lumen in the mucosal layer as well as in the circulation. RELMβ has been linked to both the pathogenesis of colon cancer and type 2 diabetes. RELMβ plays a complex role in immune system regulation, and the impact of loss of function of RELMβ on colon cancer and metabolic regulation has not been fully elucidated. We therefore tested whether Retnlβ (mouse ortholog of human RETNLβ) null mice have an enhanced or reduced susceptibility for colon cancer as well as metabolic dysfunction. We found that the lack of RELMβ leads to increased colonic expression of T helper cell type-2 cytokines and IL-17, associated with a reduced ability to maintain intestinal homeostasis. This defect leads to an enhanced susceptibility to the development of inflammation, colorectal cancer, and glucose intolerance. In conclusion, the phenotype of the Retnlβ null mice unravels new aspects of inflammation-mediated diseases and strengthens the notion that a proper intestinal barrier function is essential to sustain a healthy phenotype.
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Chellappa K, Deol P, Evans JR, Vuong LM, Chen G, Briançon N, Bolotin E, Lytle C, Nair MG, Sladek FM. Opposing roles of nuclear receptor HNF4α isoforms in colitis and colitis-associated colon cancer. eLife 2016; 5. [PMID: 27166517 PMCID: PMC4907689 DOI: 10.7554/elife.10903] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2015] [Accepted: 05/09/2016] [Indexed: 01/13/2023] Open
Abstract
HNF4α has been implicated in colitis and colon cancer in humans but the role of the different HNF4α isoforms expressed from the two different promoters (P1 and P2) active in the colon is not clear. Here, we show that P1-HNF4α is expressed primarily in the differentiated compartment of the mouse colonic crypt and P2-HNF4α in the proliferative compartment. Exon swap mice that express only P1- or only P2-HNF4α have different colonic gene expression profiles, interacting proteins, cellular migration, ion transport and epithelial barrier function. The mice also exhibit altered susceptibilities to experimental colitis (DSS) and colitis-associated colon cancer (AOM+DSS). When P2-HNF4α-only mice (which have elevated levels of the cytokine resistin-like β, RELMβ, and are extremely sensitive to DSS) are crossed with Retnlb(-/-) mice, they are rescued from mortality. Furthermore, P2-HNF4α binds and preferentially activates the RELMβ promoter. In summary, HNF4α isoforms perform non-redundant functions in the colon under conditions of stress, underscoring the importance of tracking them both in colitis and colon cancer.
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Affiliation(s)
- Karthikeyani Chellappa
- Department of Cell Biology and Neuroscience, University of California, Riverside, Riverside, United States
| | - Poonamjot Deol
- Department of Cell Biology and Neuroscience, University of California, Riverside, Riverside, United States
| | - Jane R Evans
- Department of Cell Biology and Neuroscience, University of California, Riverside, Riverside, United States
| | - Linh M Vuong
- Department of Cell Biology and Neuroscience, University of California, Riverside, Riverside, United States
| | - Gang Chen
- Division of Biomedical Sciences, University of California, Riverside, Riverside, United States
| | - Nadege Briançon
- Department of Cell Biology, Harvard Medical School, Boston, United States
| | - Eugene Bolotin
- Department of Cell Biology and Neuroscience, University of California, Riverside, Riverside, United States
| | - Christian Lytle
- Division of Biomedical Sciences, University of California, Riverside, Riverside, United States
| | - Meera G Nair
- Division of Biomedical Sciences, University of California, Riverside, Riverside, United States
| | - Frances M Sladek
- Department of Cell Biology and Neuroscience, University of California, Riverside, Riverside, United States
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Gensollen T, Iyer SS, Kasper DL, Blumberg RS. How colonization by microbiota in early life shapes the immune system. Science 2016; 352:539-44. [PMID: 27126036 PMCID: PMC5050524 DOI: 10.1126/science.aad9378] [Citation(s) in RCA: 1122] [Impact Index Per Article: 140.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Microbial colonization of mucosal tissues during infancy plays an instrumental role in the development and education of the host mammalian immune system. These early-life events can have long-standing consequences: facilitating tolerance to environmental exposures or contributing to the development of disease in later life, including inflammatory bowel disease, allergy, and asthma. Recent studies have begun to define a critical period during early development in which disruption of optimal host-commensal interactions can lead to persistent and in some cases irreversible defects in the development and training of specific immune subsets. Here, we discuss the role of early-life education of the immune system during this "window of opportunity," when microbial colonization has a potentially critical impact on human health and disease.
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Affiliation(s)
- Thomas Gensollen
- Division of Gastroenterology, Hepatology, and Endoscopy, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Shankar S Iyer
- Division of Gastroenterology, Hepatology, and Endoscopy, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Dennis L Kasper
- Division of Immunology, Department of Microbiology and Immunobiology, Harvard Medical School, Boston, MA, USA
| | - Richard S Blumberg
- Division of Gastroenterology, Hepatology, and Endoscopy, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA.
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Involvement of resistin-like molecule β in the development of methionine-choline deficient diet-induced non-alcoholic steatohepatitis in mice. Sci Rep 2016; 6:20157. [PMID: 26818807 PMCID: PMC4730188 DOI: 10.1038/srep20157] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Accepted: 12/22/2015] [Indexed: 02/06/2023] Open
Abstract
Resistin-like molecule β (RELMβ) reportedly has multiple functions including local immune responses in the gut. In this study, we investigated the possible contribution of RELMβ to non-alcoholic steatohepatitis (NASH) development. First, RELMβ knock-out (KO) mice were shown to be resistant to methionine-choline deficient (MCD) diet-induced NASH development. Since it was newly revealed that Kupffer cells in the liver express RELMβ and that RELMβ expression levels in the colon and the numbers of RELMβ-positive Kupffer cells were both increased in this model, we carried out further experiments using radiation chimeras between wild-type and RELMβ-KO mice to distinguish between the contributions of RELMβ in these two organs. These experiments revealed the requirement of RELMβ in both organs for full manifestation of NASH, while deletion of each one alone attenuated the development of NASH with reduced serum lipopolysaccharide (LPS) levels. The higher proportion of lactic acid bacteria in the gut microbiota of RELMβ-KO than in that of wild-type mice may be one of the mechanisms underlying the lower serum LPS level the former. These data suggest the contribution of increases in RELMβ in the gut and Kupffer cells to NASH development, raising the possibility of RELMβ being a novel therapeutic target for NASH.
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Fang CL, Yin LJ, Sharma S, Kierstein S, Wu HF, Eid G, Haczku A, Corrigan CJ, Ying S. Resistin-like molecule-β (RELM-β) targets airways fibroblasts to effect remodelling in asthma: from mouse to man. Clin Exp Allergy 2016; 45:940-952. [PMID: 25545115 DOI: 10.1111/cea.12481] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Revised: 11/12/2014] [Accepted: 12/16/2014] [Indexed: 01/15/2023]
Abstract
BACKGROUND RELM-β has been implicated in airways inflammation and remodelling in murine models. Its possible functions in human airways are largely unknown. The aim was to address the hypothesis that RELM-β plays a role in extracellular matrix deposition in asthmatic airways. METHODS The effects of RELM-β gene deficiency were studied in a model of allergen exposure in mice sensitised and challenged with Aspergillus fumigatus (Af). RELM-β expression was investigated in bronchial biopsies from asthmatic patients. Direct regulatory effects of RELM-β on human lung fibroblasts were examined using primary cultures and the MRC5 cell line in vitro. RESULTS Sensitisation and challenge of wild-type mice with Af-induced release of RELM-β with a time course coincident with that of procollagen in the airways. Af-induced expression of mRNA encoding some, but not all ECM in the lung parenchyma was attenuated in RELM-β-/- mice. RELM-β expression was significantly increased in the bronchial submucosa of human asthmatics compared with controls, and its expression correlated positively with that of fibronectin and α-smooth muscle actin. In addition to epithelial cells, macrophages, fibroblasts and vascular endothelial cells formed the majority of cells expressing RELM-β in the submucosa. Exposure to RELM-β increased TGF-β1, TGF-β2, collagen I, fibronectin, smooth muscle α-actin, laminin α1, and hyaluronan and proteoglycan link protein 1 (Hapl1) production as well as proliferation by human lung fibroblasts in vitro. These changes were associated with activation of ERK1/2 in MRC5 cells. CONCLUSION The data are consistent with the hypothesis that elevated RELM-β expression in asthmatic airways contributes to airways remodelling at least partly by increasing fibroblast proliferation and differentiation with resulting deposition of extracellular matrix proteins.
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Affiliation(s)
- C L Fang
- MRC & Asthma UK Centre for Allergic Mechanisms of Asthma, The Department of Asthma, Allergy and Respiratory Science, King's College London, London, UK
| | - L J Yin
- Tangshan Key Laboratory for Preclinical and Basic Research on Chronic Diseases and Division of Pharmacology, School of Basic Medical Science, Hebei United University, Hebei, China
| | - S Sharma
- Department of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - S Kierstein
- Department of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - H F Wu
- MRC & Asthma UK Centre for Allergic Mechanisms of Asthma, The Department of Asthma, Allergy and Respiratory Science, King's College London, London, UK
| | - G Eid
- MRC & Asthma UK Centre for Allergic Mechanisms of Asthma, The Department of Asthma, Allergy and Respiratory Science, King's College London, London, UK
| | - A Haczku
- Department of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - C J Corrigan
- MRC & Asthma UK Centre for Allergic Mechanisms of Asthma, The Department of Asthma, Allergy and Respiratory Science, King's College London, London, UK
| | - S Ying
- MRC & Asthma UK Centre for Allergic Mechanisms of Asthma, The Department of Asthma, Allergy and Respiratory Science, King's College London, London, UK.,The Department of Immunology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
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Dey N, Wagner VE, Blanton LV, Cheng J, Fontana L, Haque R, Ahmed T, Gordon JI. Regulators of gut motility revealed by a gnotobiotic model of diet-microbiome interactions related to travel. Cell 2015; 163:95-107. [PMID: 26406373 DOI: 10.1016/j.cell.2015.08.059] [Citation(s) in RCA: 146] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Revised: 07/20/2015] [Accepted: 08/17/2015] [Indexed: 12/28/2022]
Abstract
To understand how different diets, the consumers' gut microbiota, and the enteric nervous system (ENS) interact to regulate gut motility, we developed a gnotobiotic mouse model that mimics short-term dietary changes that happen when humans are traveling to places with different culinary traditions. Studying animals transplanted with the microbiota from humans representing diverse culinary traditions and fed a sequence of diets representing those of all donors, we found that correlations between bacterial species abundances and transit times are diet dependent. However, the levels of unconjugated bile acids-generated by bacterial bile salt hydrolases (BSH)-correlated with faster transit, including during consumption of a Bangladeshi diet. Mice harboring a consortium of sequenced cultured bacterial strains from the Bangladeshi donor's microbiota and fed a Bangladeshi diet revealed that the commonly used cholekinetic spice, turmeric, affects gut motility through a mechanism that reflects bacterial BSH activity and Ret signaling in the ENS. These results demonstrate how a single food ingredient interacts with a functional microbiota trait to regulate host physiology.
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Affiliation(s)
- Neelendu Dey
- Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO 63108, USA; Center for Gut Microbiome and Nutrition Research, Washington University School of Medicine, St. Louis, MO 63108, USA; Department of Medicine, Washington University School of Medicine, St. Louis, MO 63108, USA
| | - Vitas E Wagner
- Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO 63108, USA; Center for Gut Microbiome and Nutrition Research, Washington University School of Medicine, St. Louis, MO 63108, USA
| | - Laura V Blanton
- Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO 63108, USA; Center for Gut Microbiome and Nutrition Research, Washington University School of Medicine, St. Louis, MO 63108, USA
| | - Jiye Cheng
- Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO 63108, USA; Center for Gut Microbiome and Nutrition Research, Washington University School of Medicine, St. Louis, MO 63108, USA
| | - Luigi Fontana
- Department of Medicine, Washington University School of Medicine, St. Louis, MO 63108, USA
| | - Rashidul Haque
- Centre for Nutrition and Food Security, International Centre for Diarrhoeal Disease Research, Dhaka 1212, Bangladesh
| | - Tahmeed Ahmed
- Centre for Nutrition and Food Security, International Centre for Diarrhoeal Disease Research, Dhaka 1212, Bangladesh
| | - Jeffrey I Gordon
- Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO 63108, USA; Center for Gut Microbiome and Nutrition Research, Washington University School of Medicine, St. Louis, MO 63108, USA.
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Deficiency of Group VIA Phospholipase A2 (iPLA2β) Renders Susceptibility for Chemical-Induced Colitis. Dig Dis Sci 2015; 60:3590-602. [PMID: 26182903 DOI: 10.1007/s10620-015-3807-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2015] [Accepted: 07/09/2015] [Indexed: 12/19/2022]
Abstract
BACKGROUND Inflammatory bowel disease results from a combination of dysfunction of intestinal epithelial barrier and dysregulation of mucosal immune system. iPLA2β has multiple homeostatic functions and shown to play a role in membrane remodeling, cell proliferation, monocyte chemotaxis, and apoptosis. The latter may render chronic inflammation and susceptibility for acute injury. AIMS We aim to evaluate whether an inactivation of iPLA2β would enhance the pathogenesis of experimental colitis induced by dextran sodium sulfate. METHODS iPLA2β-null male mice were administered dextran sodium sulfate in drinking water for 7 days followed by normal water for 3 days. At day 10, mice were killed, and harvested colon and ileum were subjected for evaluation by histology, immunohistochemistry, and quantitative RT-PCR. RESULTS Dextran sodium sulfate administration caused a significant increase in histological scores and cleaved caspase 3 (+) apoptosis concomitant with a decrease in colon length and crypt cell Ki67 (+) proliferation in iPLA2β-null mice in a greater extent than in control littermates. This sensitization by iPLA2β deficiency was associated with an increase in accumulation of F4/80 (+) macrophages, and expression of proinflammatory cytokines and chemokines, while the number of mucin-containing goblet cells and mucus layer thickness was decreased. Some of these abnormalities were also observed in the ileum. CONCLUSIONS An inactivation of iPLA2β exacerbated pathogenesis of experimental colitis by promoting intestinal epithelial cell apoptosis, inhibiting crypt cell regeneration, and causing damage to mucus barrier allowing an activation of innate immune response. Thus, iPLA2β may represent a susceptible gene for the development of inflammatory bowel disease.
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Monk JM, Lepp D, Zhang CP, Wu W, Zarepoor L, Lu JT, Pauls KP, Tsao R, Wood GA, Robinson LE, Power KA. Diets enriched with cranberry beans alter the microbiota and mitigate colitis severity and associated inflammation. J Nutr Biochem 2015; 28:129-39. [PMID: 26878790 DOI: 10.1016/j.jnutbio.2015.10.014] [Citation(s) in RCA: 76] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Revised: 09/23/2015] [Accepted: 10/16/2015] [Indexed: 12/19/2022]
Abstract
Common beans are rich in phenolic compounds and nondigestible fermentable components, which may help alleviate intestinal diseases. We assessed the gut health priming effect of a 20% cranberry bean flour diet from two bean varieties with differing profiles of phenolic compounds [darkening (DC) and nondarkening (NDC) cranberry beans vs. basal diet control (BD)] on critical aspects of gut health in unchallenged mice, and during dextran sodium sulfate (DSS)-induced colitis (2% DSS wt/vol, 7 days). In unchallenged mice, NDC and DC increased (i) cecal short-chain fatty acids, (ii) colon crypt height, (iii) crypt goblet cell number and mucus content and (iv) Muc1, Klf4, Relmβ and Reg3γ gene expression vs. BD, indicative of enhanced microbial activity and gut barrier function. Fecal 16S rRNA sequencing determined that beans reduced abundance of the Lactobacillaceae (Ruminococcus gnavus), Clostridiaceae (Clostridium perfringens), Peptococcaceae, Peptostreptococcaceae, Rikenellaceae and Pophyromonadaceae families, and increased abundance of S24-7 and Prevotellaceae. During colitis, beans reduced (i) disease severity and colonic histological damage, (ii) increased gene expression of barrier function promoting genes (Muc1-3, Relmβ, and Reg3γ) and (iii) reduced colonic and circulating inflammatory cytokines (IL-1β, IL-6, IFNγ and TNFα). Therefore, prior to disease induction, bean supplementation enhanced multiple concurrent gut health promoting parameters that translated into reduced colitis severity. Moreover, both bean diets exerted similar effects, indicating that differing phenolic content did not influence the endpoints assessed. These data demonstrate a proof-of-concept regarding the gut-priming potential of beans in colitis, which could be extended to mitigate the severity of other gut barrier-associated pathologies.
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Affiliation(s)
- Jennifer M Monk
- Guelph Food Research Centre, Agriculture and Agri-Food Canada, Guelph, ON, Canada N1G 5C9; Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada N1G 2W1
| | - Dion Lepp
- Guelph Food Research Centre, Agriculture and Agri-Food Canada, Guelph, ON, Canada N1G 5C9
| | - Claire P Zhang
- Guelph Food Research Centre, Agriculture and Agri-Food Canada, Guelph, ON, Canada N1G 5C9; Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada N1G 2W1
| | - Wenqing Wu
- Guelph Food Research Centre, Agriculture and Agri-Food Canada, Guelph, ON, Canada N1G 5C9
| | - Leila Zarepoor
- Guelph Food Research Centre, Agriculture and Agri-Food Canada, Guelph, ON, Canada N1G 5C9; Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada N1G 2W1
| | - Jenifer T Lu
- Guelph Food Research Centre, Agriculture and Agri-Food Canada, Guelph, ON, Canada N1G 5C9; Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada N1G 2W1
| | - K Peter Pauls
- Department of Plant Agriculture, University of Guelph, Guelph, ON, Canada N1G 2W1
| | - Rong Tsao
- Guelph Food Research Centre, Agriculture and Agri-Food Canada, Guelph, ON, Canada N1G 5C9
| | - Geoffrey A Wood
- Department of Pathobiology, University of Guelph, Guelph, ON, Canada N1G 2W1
| | - Lindsay E Robinson
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada N1G 2W1
| | - Krista A Power
- Guelph Food Research Centre, Agriculture and Agri-Food Canada, Guelph, ON, Canada N1G 5C9; Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada N1G 2W1.
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Power KA, Lepp D, Zarepoor L, Monk JM, Wu W, Tsao R, Liu R. Dietary flaxseed modulates the colonic microenvironment in healthy C57Bl/6 male mice which may alter susceptibility to gut-associated diseases. J Nutr Biochem 2015; 28:61-9. [PMID: 26878783 DOI: 10.1016/j.jnutbio.2015.09.028] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Revised: 09/28/2015] [Accepted: 09/30/2015] [Indexed: 12/25/2022]
Abstract
Understanding how dietary components alter the healthy baseline colonic microenvironment is important in determining their roles in influencing gut health and gut-associated diseases. Dietary flaxseed (FS) has demonstrated anti-colon cancer effects in numerous rodent models, however, exacerbated acute colonic mucosal injury and inflammation in a colitis model. This study investigates whether FS alters critical aspects of gut health in healthy unchallenged mice, which may help explain some of the divergent effects observed following different gut-associated disease challenges. Four-week-old C57Bl/6 male mice were fed an AIN-93G basal diet (BD) or an isocaloric BD+10% ground FS diet for 3 weeks. FS enhanced colon goblet cell density, mucus production, MUC2 mRNA expression, and cecal short chain fatty acid levels, indicative of beneficial intestinal barrier integrity responses. Additionally, FS enhanced colonic regenerating islet-derived protein 3 gamma (RegIIIγ) and reduced MUC1 and resistin-like molecule beta (RELMβ) mRNA expression which may indicate altered responses in regulating microbial defense and injury repair responses. FS diet altered the fecal microbial community structure (16S rRNA gene profiling), including a 20-fold increase in Prevotella spp. and a 30-fold reduction in Akkermansia muciniphila abundance. A 10-fold reduction in A. muciniphila abundance by FS was also demonstrated in the colon tissue-associated microbiota (quantitative PCR). Furthermore, fecal branched chain fatty acids were increased by FS, indicative of increased microbial-derived putrefactive compounds. In conclusion, consumption of a FS-supplemented diet alters the baseline colonic microenvironment of healthy mice which may modify subsequent mucosal microbial defense and injury-repair responses leading to altered susceptibility to different gut-associated diseases.
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Affiliation(s)
- Krista A Power
- Guelph Food Research Centre, Agriculture and Agri-Food Canada, AAFC, Guelph, Ontario.
| | - Dion Lepp
- Guelph Food Research Centre, Agriculture and Agri-Food Canada, AAFC, Guelph, Ontario
| | - Leila Zarepoor
- Guelph Food Research Centre, Agriculture and Agri-Food Canada, AAFC, Guelph, Ontario
| | - Jennifer M Monk
- Guelph Food Research Centre, Agriculture and Agri-Food Canada, AAFC, Guelph, Ontario
| | - Wenqing Wu
- Guelph Food Research Centre, Agriculture and Agri-Food Canada, AAFC, Guelph, Ontario
| | - Rong Tsao
- Guelph Food Research Centre, Agriculture and Agri-Food Canada, AAFC, Guelph, Ontario
| | - Ronghua Liu
- Guelph Food Research Centre, Agriculture and Agri-Food Canada, AAFC, Guelph, Ontario
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Bergstrom KSB, Morampudi V, Chan JM, Bhinder G, Lau J, Yang H, Ma C, Huang T, Ryz N, Sham HP, Zarepour M, Zaph C, Artis D, Nair M, Vallance BA. Goblet Cell Derived RELM-β Recruits CD4+ T Cells during Infectious Colitis to Promote Protective Intestinal Epithelial Cell Proliferation. PLoS Pathog 2015; 11:e1005108. [PMID: 26285214 PMCID: PMC4540480 DOI: 10.1371/journal.ppat.1005108] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Accepted: 07/23/2015] [Indexed: 12/15/2022] Open
Abstract
Enterohemorrhagic Escherichia coli and related food and waterborne pathogens pose significant threats to human health. These attaching/effacing microbes infect the apical surface of intestinal epithelial cells (IEC), causing severe diarrheal disease. Colonizing the intestinal luminal surface helps segregate these microbes from most host inflammatory responses. Based on studies using Citrobacter rodentium, a related mouse pathogen, we speculate that hosts rely on immune-mediated changes in IEC, including goblet cells to defend against these pathogens. These changes include a CD4+ T cell-dependent increase in IEC proliferation to replace infected IEC, as well as altered production of the goblet cell-derived mucin Muc2. Another goblet cell mediator, REsistin-Like Molecule (RELM)-β is strongly induced within goblet cells during C. rodentium infection, and was detected in the stool as well as serum. Despite its dramatic induction, RELM-β’s role in host defense is unclear. Thus, wildtype and RELM-β gene deficient mice (Retnlb-/-) were orally infected with C. rodentium. While their C. rodentium burdens were only modestly elevated, infected Retnlb-/- mice suffered increased mortality and mucosal ulceration due to deep pathogen penetration of colonic crypts. Immunostaining for Ki67 and BrDU revealed Retnlb-/- mice were significantly impaired in infection-induced IEC hyper-proliferation. Interestingly, exposure to RELM-β did not directly increase IEC proliferation, rather RELM-β acted as a CD4+ T cell chemoattractant. Correspondingly, Retnlb-/- mice showed impaired CD4+ T cell recruitment to their infected colons, along with reduced production of interleukin (IL)-22, a multifunctional cytokine that directly increased IEC proliferation. Enema delivery of RELM-β to Retnlb-/- mice restored CD4+ T cell recruitment, concurrently increasing IL-22 levels and IEC proliferation, while reducing mucosal pathology. These findings demonstrate that RELM-β and goblet cells play an unexpected, yet critical role in recruiting CD4+ T cells to the colon to protect against an enteric pathogen, in part via the induction of increased IEC proliferation. Food and water-borne bacterial pathogens such as enterohemorrhagic Escherichia coli (EHEC) target the epithelial cells that line the inner surface of their host’s intestines, causing inflammation and diarrhea. While professional immune cells including T lymphocytes are well known for promoting host defense, we hypothesized that as the cells in closest contact with these bacterial pathogens, intestinal epithelial cells also play an active and essential role in protecting the host during infection. Infecting mice with Citrobacter rodentium, a mouse specific relative of EHEC, we noted a dramatic upregulation in the expression and secretion of the mediator RELM-β by a subset of epithelial cells called goblet cells. Compared to wildtype mice, mice lacking RELM-β showed less epithelial cell proliferation and suffered significantly more intestinal damage during infection. Rather than directly causing epithelial cell proliferation, we found RELM-β instead recruited T lymphocytes to the infected intestine. Upon reaching the intestine, the T lymphocytes produced the cytokine interleukin-22, which directly increased epithelial cell proliferation. Taken together, these findings indicate that epithelial/goblet cells play a critical role in orchestrating the host response to an intestinal pathogen, by recruiting T lymphocytes and by promoting epithelial proliferation to limit the intestinal damage suffered during infection.
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Affiliation(s)
- Kirk S. B. Bergstrom
- Division of Gastroenterology, Department of Pediatrics, Child and Family Research Institute, Vancouver, Canada
| | - Vijay Morampudi
- Division of Gastroenterology, Department of Pediatrics, Child and Family Research Institute, Vancouver, Canada
| | - Justin M. Chan
- Division of Gastroenterology, Department of Pediatrics, Child and Family Research Institute, Vancouver, Canada
| | - Ganive Bhinder
- Division of Gastroenterology, Department of Pediatrics, Child and Family Research Institute, Vancouver, Canada
| | - Jennifer Lau
- Division of Gastroenterology, Department of Pediatrics, Child and Family Research Institute, Vancouver, Canada
| | - Hyungjun Yang
- Division of Gastroenterology, Department of Pediatrics, Child and Family Research Institute, Vancouver, Canada
| | - Caixia Ma
- Division of Gastroenterology, Department of Pediatrics, Child and Family Research Institute, Vancouver, Canada
| | - Tina Huang
- Division of Gastroenterology, Department of Pediatrics, Child and Family Research Institute, Vancouver, Canada
| | - Natasha Ryz
- Division of Gastroenterology, Department of Pediatrics, Child and Family Research Institute, Vancouver, Canada
| | - Ho Pan Sham
- Division of Gastroenterology, Department of Pediatrics, Child and Family Research Institute, Vancouver, Canada
| | - Maryam Zarepour
- Division of Gastroenterology, Department of Pediatrics, Child and Family Research Institute, Vancouver, Canada
| | - Colby Zaph
- Biomedical Research Centre, University of British Columbia, Vancouver, Canada
| | - David Artis
- Jill Roberts Institute for Research in Inflammatory Bowel Disease, Joan and Sanford Weill Department of Medicine, West Cornell Medical College, Cornell University, New York, New York, United States of America
| | - Meera Nair
- Division of Biomedical Sciences, University of California, Riverside, Riverside, California, United States of America
| | - Bruce A. Vallance
- Division of Gastroenterology, Department of Pediatrics, Child and Family Research Institute, Vancouver, Canada
- * E-mail:
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Tsuboi K, Nishitani M, Takakura A, Imai Y, Komatsu M, Kawashima H. Autophagy Protects against Colitis by the Maintenance of Normal Gut Microflora and Secretion of Mucus. J Biol Chem 2015; 290:20511-26. [PMID: 26149685 DOI: 10.1074/jbc.m114.632257] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Indexed: 12/27/2022] Open
Abstract
Genome-wide association studies of inflammatory bowel diseases identified susceptible loci containing an autophagy-related gene. However, the role of autophagy in the colon, a major affected area in inflammatory bowel diseases, is not clear. Here, we show that colonic epithelial cell-specific autophagy-related gene 7 (Atg7) conditional knock-out (cKO) mice showed exacerbation of experimental colitis with more abundant bacterial invasion into the colonic epithelium. Quantitative PCR analysis revealed that cKO mice had abnormal microflora with an increase of some genera. Consistently, expression of antimicrobial or antiparasitic peptides such as angiogenin-4, Relmβ, intelectin-1, and intelectin-2 as well as that of their inducer cytokines was significantly reduced in the cKO mice. Furthermore, secretion of colonic mucins that function as a mucosal barrier against bacterial invasion was also significantly diminished in cKO mice. Taken together, our results indicate that autophagy in colonic epithelial cells protects against colitis by the maintenance of normal gut microflora and secretion of mucus.
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Affiliation(s)
- Koichiro Tsuboi
- From the Department of Biochemistry, Hoshi University School of Pharmacy and Pharmaceutical Sciences, Tokyo 142-8501, the Laboratory of Microbiology and Immunology, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka 422-8526, and
| | - Mayo Nishitani
- the Laboratory of Microbiology and Immunology, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka 422-8526, and
| | - Atsushi Takakura
- the Laboratory of Microbiology and Immunology, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka 422-8526, and
| | - Yasuyuki Imai
- the Laboratory of Microbiology and Immunology, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka 422-8526, and
| | - Masaaki Komatsu
- the Department of Biochemistry, School of Medicine, Niigata University, Niigata 951-8510, Japan
| | - Hiroto Kawashima
- From the Department of Biochemistry, Hoshi University School of Pharmacy and Pharmaceutical Sciences, Tokyo 142-8501, the Laboratory of Microbiology and Immunology, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka 422-8526, and
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Al Hannan F, Culligan KG. Human resistin and the RELM of Inflammation in diabesity. Diabetol Metab Syndr 2015; 7:54. [PMID: 26097512 PMCID: PMC4474570 DOI: 10.1186/s13098-015-0050-3] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2015] [Accepted: 06/05/2015] [Indexed: 12/11/2022] Open
Abstract
The initial discovery of resistin and resistin-like molecules (RELMs) in rodents suggested a role for these adipocytokines in molecular linkage of obesity, Type 2 Diabetes mellitus and metabolic syndrome. Since then, it became apparent that the story of resistin and RELMs was very much of mice and men. The putative role of this adipokine family evolved from that of a conveyor of insulin resistance in rodents to instigator of inflammatory processes in humans. Structural dissimilarity, variance in distribution profiles and a lack of corroborating evidence for functional similarities separate the biological functions of resistin in humans from that of rodents. Although present in gross visceral fat deposits in humans, resistin is a component of inflammation, being released from infiltrating white blood cells of the sub-clinical chronic low grade inflammatory response accompanying obesity, rather than from the adipocyte itself. This led researchers to further explore the functions of the resistin family of proteins in inflammatory-related conditions such as atherosclerosis, as well as in cancers such as endometrial and gastric cancers. Although elevated levels of resistin have been found in these conditions, whether it is causative or as a result of these conditions still remains to be determined.
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Affiliation(s)
- Fatima Al Hannan
- />Department of Biomedical Sciences, Royal College of Surgeons in Ireland – Bahrain, Building No. 2441, Road 2835, Busaiteen, Kingdom of Bahrain
| | - Kevin Gerard Culligan
- />Department of Biomedical Sciences, Royal College of Surgeons in Ireland – Bahrain, Building No. 2441, Road 2835, Busaiteen, Kingdom of Bahrain
- />Royal College of Surgeons in Ireland – Bahrain, PO Box 15503, Adliya, Kingdom of Bahrain
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Meng X, Kong J, Zhang K, Yang J, Li J, Zhang Y. Association of resistin-like molecule β levels and abdominal aortic aneurysm. Int J Cardiol 2014; 181:8-10. [PMID: 25479529 DOI: 10.1016/j.ijcard.2014.11.197] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2014] [Accepted: 11/24/2014] [Indexed: 11/26/2022]
Affiliation(s)
- Xiao Meng
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, Qilu Hospital, Shandong University, Jinan, China
| | - Jing Kong
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, Qilu Hospital, Shandong University, Jinan, China
| | - Kai Zhang
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, Qilu Hospital, Shandong University, Jinan, China
| | - Jianmin Yang
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, Qilu Hospital, Shandong University, Jinan, China
| | - Jifu Li
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, Qilu Hospital, Shandong University, Jinan, China.
| | - Yun Zhang
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, Qilu Hospital, Shandong University, Jinan, China.
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Jacobs JP, Braun J. Immune and genetic gardening of the intestinal microbiome. FEBS Lett 2014; 588:4102-11. [PMID: 24613921 PMCID: PMC4156569 DOI: 10.1016/j.febslet.2014.02.052] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Revised: 02/26/2014] [Accepted: 02/27/2014] [Indexed: 12/19/2022]
Abstract
The mucosal immune system - consisting of adaptive and innate immune cells as well as the epithelium - is profoundly influenced by its microbial environment. There is now growing evidence that the converse is also true, that the immune system shapes the composition of the intestinal microbiome. During conditions of health, this bidirectional interaction achieves a homeostasis in which inappropriate immune responses to non-pathogenic microbes are averted and immune activity suppresses blooms of potentially pathogenic microbes (pathobionts). Genetic alteration in immune/epithelial function can affect host gardening of the intestinal microbiome, contributing to the diversity of intestinal microbiota within a population and in some cases allowing for unfavorable microbial ecologies (dysbiosis) that confer disease susceptibility.
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Affiliation(s)
- Jonathan P Jacobs
- Division of Digestive Diseases, Department of Medicine, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA
| | - Jonathan Braun
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA.
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Ramanan D, Tang MS, Bowcutt R, Loke P, Cadwell K. Bacterial sensor Nod2 prevents inflammation of the small intestine by restricting the expansion of the commensal Bacteroides vulgatus. Immunity 2014; 41:311-24. [PMID: 25088769 DOI: 10.1016/j.immuni.2014.06.015] [Citation(s) in RCA: 200] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Accepted: 06/23/2014] [Indexed: 12/16/2022]
Abstract
UNLABELLED Nod2 has been extensively characterized as a bacterial sensor that induces an antimicrobial and inflammatory gene expression program. Therefore, it is unclear why Nod2 mutations that disrupt bacterial recognition are paradoxically among the highest risk factors for Crohn's disease, which involves an exaggerated immune response directed at intestinal bacteria. Here, we identified several abnormalities in the small-intestinal epithelium of Nod2(-/-) mice including inflammatory gene expression and goblet cell dysfunction, which were associated with excess interferon-γ production by intraepithelial lymphocytes and Myd88 activity. Remarkably, these abnormalities were dependent on the expansion of a common member of the intestinal microbiota Bacteroides vulgatus, which also mediated exacerbated inflammation in Nod2(-/-) mice upon small-intestinal injury. These results indicate that Nod2 prevents inflammatory pathologies by controlling the microbiota and support a multihit disease model involving specific gene-microbe interactions. VIDEO ABSTRACT
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Affiliation(s)
- Deepshika Ramanan
- Kimmel Center for Biology and Medicine at the Skirball Institute, New York University School of Medicine, New York, NY 10016, USA; Sackler Institute of Graduate Biomedical Science, New York University School of Medicine, New York, NY 10016, USA
| | - Mei San Tang
- Department of Microbiology, New York University School of Medicine, New York, NY 10016, USA
| | - Rowann Bowcutt
- Department of Microbiology, New York University School of Medicine, New York, NY 10016, USA
| | - P'ng Loke
- Department of Microbiology, New York University School of Medicine, New York, NY 10016, USA
| | - Ken Cadwell
- Kimmel Center for Biology and Medicine at the Skirball Institute, New York University School of Medicine, New York, NY 10016, USA; Department of Microbiology, New York University School of Medicine, New York, NY 10016, USA.
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Almeida JAS, Ponnuraj NP, Lee JJ, Utterback P, Gaskins HR, Dilger RN, Pettigrew JE. Effects of dietary clays on performance and intestinal mucus barrier of broiler chicks challenged with Salmonella enterica serovar Typhimurium and on goblet cell function in vitro. Poult Sci 2014; 93:839-47. [PMID: 24706960 DOI: 10.3382/ps.2013-03587] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
In vivo and in vitro experiments were conducted to test for beneficial effects of dietary clays on broiler chicks challenged with Salmonella enterica serovar Typhimurium and to explore potential mechanisms. First, two hundred forty 1-d-old male broilers (initial BW: 41.6 ± 0.4 g) were allotted in a 2 × 4 factorial arrangement in a randomized complete block design. There were 2 infection treatments (with or without Salmonella) and 4 diets: basal (BAS), 0.3% smectite A (SMA), 0.3% smectite B, and 0.3% zeolite. The Salmonella reduced (P < 0.05) the growth rate of chicks fed the BAS, and feeding clay largely restored it (challenge × diet interaction, P < 0.05). Goblet cell number and size were increased (P < 0.05) by Salmonella in chicks fed the BAS and were reduced (P < 0.05) in Salmonella-challenged chicks by feeding SMA. Villus height was reduced by the Salmonella challenge in the chicks fed dietary clays (P < 0.01) but not in chicks fed the BAS (interaction P < 0.05). A human adenocarcinoma cell line (LS174T) was cultured in vitro in 3 separate experiments in the absence or presence of 3 concentrations (0.05, 0.10, and 0.50%) of SMA. Expression of mucin 2 (MUC2), resistin-like molecule β (RELMß), and trefoil factor 3 (TFF3) were determined by real-time reverse-transcription PCR. The expression of RELMβ was increased and expression of MUC2 was reduced (P < 0.05) by 0.10% SMA. Also, LS174T cells were cultured without or with SMA (0.05 and 0.10%) and the medium and cell lysate were analyzed for RELMβ using an immunoblot assay. Protein expression of RELMß in the cell lysate was reduced (P < 0.05) by SMA addition but increased in the medium, indicating that SMA increased secretion of RELMß, thus depleting the cell and concentrating this protein in the medium. In conclusion, the dietary clays restored the growth depression caused by Salmonella, and changes in goblet cell function may contribute to the benefits of one of the clays, specifically SMA.
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Affiliation(s)
- J A S Almeida
- Department of Animal Sciences, University of Illinois, Urbana 61801
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Jiang S, Park DW, Tadie JM, Gregoire M, Deshane J, Pittet JF, Abraham E, Zmijewski JW. Human resistin promotes neutrophil proinflammatory activation and neutrophil extracellular trap formation and increases severity of acute lung injury. THE JOURNAL OF IMMUNOLOGY 2014; 192:4795-803. [PMID: 24719460 DOI: 10.4049/jimmunol.1302764] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Although resistin was recently found to modulate insulin resistance in preclinical models of type II diabetes and obesity, recent studies also suggested that resistin has proinflammatory properties. We examined whether the human-specific variant of resistin affects neutrophil activation and the severity of LPS-induced acute lung injury. Because human and mouse resistin have distinct patterns of tissue distribution, experiments were performed using humanized resistin mice that exclusively express human resistin (hRTN(+/-)(/-)) but are deficient in mouse resistin. Enhanced production of TNF-α or MIP-2 was found in LPS-treated hRtn(+/-/-) neutrophils compared with control Rtn(-/-/-) neutrophils. Expression of human resistin inhibited the activation of AMP-activated protein kinase, a major sensor and regulator of cellular bioenergetics that also is implicated in inhibiting inflammatory activity of neutrophils and macrophages. In addition to the ability of resistin to sensitize neutrophils to LPS stimulation, human resistin enhanced neutrophil extracellular trap formation. In LPS-induced acute lung injury, humanized resistin mice demonstrated enhanced production of proinflammatory cytokines, more severe pulmonary edema, increased neutrophil extracellular trap formation, and elevated concentration of the alarmins HMGB1 and histone 3 in the lungs. Our results suggest that human resistin may play an important contributory role in enhancing TLR4-induced inflammatory responses, and it may be a target for future therapies aimed at reducing the severity of acute lung injury and other inflammatory situations in which neutrophils play a major role.
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Affiliation(s)
- Shaoning Jiang
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294
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Abstract
PURPOSE OF REVIEW Guanylate cyclase C (GC-C) is a transmembrane receptor that is expressed primarily on intestinal epithelial cells. Activation of this receptor by its endogenous peptide ligands initiates cyclic guanosine monophosphate-dependent (cGMP) salt and water movement in the intestine. GC-C is targeted by the enterotoxigenic Escherichia coli heat-stable enterotoxin STa, which deregulates this pathway and causes secretory diarrhea. This review discusses current work on the physiological function of GC-C in the intestine. RECENT FINDINGS Familial GC-C mutations demonstrate that epithelial cGMP signaling is critical to electrolyte and fluid balance in the neonatal intestine. Chronic deregulation of GC-C activity in early life increases susceptibility to a number of disorders, including obstruction and inflammatory bowel disease. Murine models indicate that GC-C regulates the composition of intestinal commensal microflora and that it suppresses bacterial infection and modulates colonic injury and inflammation. Therapeutic GC-C ligands are used to successfully treat constipation-predominant irritable bowel syndrome and recent studies show that extracellular cGMP is an important mechanism of reducing abdominal pain associated with this disorder. SUMMARY Originally identified as a target of E. coli enterotoxin STa, GC-C is an important regulator of physiological salt and water homeostasis and may directly impact a wide range of intestinal disorders.
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Harmel-Laws E, Mann EA, Cohen MB, Steinbrecher KA. Guanylate cyclase C deficiency causes severe inflammation in a murine model of spontaneous colitis. PLoS One 2013; 8:e79180. [PMID: 24244444 PMCID: PMC3823613 DOI: 10.1371/journal.pone.0079180] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Accepted: 09/20/2013] [Indexed: 12/18/2022] Open
Abstract
Background Guanylate Cyclase C (GC-C; Gucy2c) is a transmembrane receptor expressed in intestinal epithelial cells. Activation of GC-C by its secreted ligand guanylin stimulates intestinal fluid secretion. Familial mutations in GC-C cause chronic diarrheal disease or constipation and are associated with intestinal inflammation and infection. Here, we investigated the impact of GC-C activity on mucosal immune responses. Methods We utilized intraperitoneal injection of lipopolysaccharide to elicit a systemic cytokine challenge and then measured pro-inflammatory gene expression in colonic mucosa. GC-C+/+ and GC-C−/− mice were bred with interleukin (IL)-10 deficient animals and colonic inflammation were assessed. Immune cell influx and cytokine/chemokine expression was measured in the colon of wildtype, IL-10−/−, GC-C+/+IL-10−/− and GC-C−/−IL-10−/− mice. GC-C and guanylin production were examined in the colon of these animals and in a cytokine-treated colon epithelial cell line. Results Relative to GC-C+/+ animals, intraperitoneal lipopolysaccharide injection into GC-C−/− mice increased proinflammatory gene expression in both whole colon tissue and in partially purified colonocyte isolations. Spontaneous colitis in GC-C−/−IL-10−/− animals was significantly more severe relative to GC-C+/+IL-10−/− mice. Unlike GC-C+/+IL-10−/− controls, colon pathology in GC-C−/−IL-10−/− animals was apparent at an early age and was characterized by severely altered mucosal architecture, crypt abscesses, and hyperplastic subepithelial lesions. F4/80 and myeloperoxidase positive cells as well as proinflammatory gene expression were elevated in GC-C−/−IL-10−/− mucosa relative to control animals. Guanylin was diminished early in colitis in vivo and tumor necrosis factor α suppressed guanylin mRNA and protein in intestinal goblet cell-like HT29-18-N2 cells. Conclusions The GC-C signaling pathway blunts colonic mucosal inflammation that is initiated by systemic cytokine burst or loss of mucosal immune cell immunosuppression. These data as well as the apparent intestinal inflammation in human GC-C mutant kindred underscore the importance of GC-C in regulating the response to injury and inflammation within the gut.
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Affiliation(s)
- Eleana Harmel-Laws
- Division of Gastroenterology, Hepatology, and Nutrition, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, United States of America
| | - Elizabeth A. Mann
- Division of Gastroenterology, Hepatology, and Nutrition, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, United States of America
| | - Mitchell B. Cohen
- Department of Pediatrics, University of Cincinnati College of Medicine Cincinnati, Ohio, United States of America
- Division of Gastroenterology, Hepatology, and Nutrition, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, United States of America
| | - Kris A. Steinbrecher
- Department of Pediatrics, University of Cincinnati College of Medicine Cincinnati, Ohio, United States of America
- Division of Gastroenterology, Hepatology, and Nutrition, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, United States of America
- * E-mail:
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Tóth Š, Jonecová Z, Varga J, Staško P, Kovalčinová B, Maretta M, Leško D, Veselá J. Immunohistochemical study of jejunal graft mucosa cell populations during the initial adaptation phase in the host body in rats. Acta Histochem 2013; 115:803-9. [PMID: 23628267 DOI: 10.1016/j.acthis.2013.03.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2013] [Revised: 03/12/2013] [Accepted: 03/12/2013] [Indexed: 12/25/2022]
Abstract
The character of the changes in cell populations within the jejunal graft mucosa during the initial adaptation phase in the host body was investigated. 24 adult male Wistar rats underwent intestinal heterotopic allotransplantation. Aorto-aortal and porto-caval anastomoses were performed using the end-to-side microsurgery technique. Graft tissues were compared to the intestinal tissues of the recipients. This study demonstrates that: (1) Distinct injury to the graft mucosa 1h after transplantation was accompanied by significant reduction in numbers of epithelial secretory cell populations. The injury was more intense in the mesenteric portion. Six hours after transplantation the graft mucosa was covered by a continuous epithelium, but the number of goblet and Paneth cells was found to be less than 30% of that in the recipient epithelium. (2) In comparison with recipients, myeloperoxidase-positive cell numbers increased significantly in the graft mucosa 1 h after transplantation. In the epithelial layer, denudation and destruction of villi was associated with a significant reduction in intraepithelial lymphocyte numbers. A significant decrease in mucosal mast cell numbers was detected 6 h after transplantation. They attained only 10% of the number found in the recipients. (3) Time-dependent changes in the graft mucosa revealed that CD163-positive cells increased significantly in the graft mucosa during 6 h after transplantation and reached the level found in the recipients. In contrast, the myeloperoxidase-positive cell population significantly decreased in the graft mucosa within the initial 6 h.
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Kushiyama A, Sakoda H, Oue N, Okubo M, Nakatsu Y, Ono H, Fukushima T, Kamata H, Nishimura F, Kikuchi T, Fujishiro M, Nishiyama K, Aburatani H, Kushiyama S, Iizuka M, Taki N, Encinas J, Sentani K, Ogonuki N, Ogura A, Kawazu S, Yasui W, Higashi Y, Kurihara H, Katagiri H, Asano T. Resistin-Like Molecule β Is Abundantly Expressed in Foam Cells and Is Involved in Atherosclerosis Development. Arterioscler Thromb Vasc Biol 2013; 33:1986-93. [DOI: 10.1161/atvbaha.113.301546] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Akifumi Kushiyama
- From the Department of Internal Medicine, The Institute for Adult Diseases, Asahi Life Foundation, Tokyo, Japan (A.K., T.K., S.K.); Department of Internal Medicine, Graduate School of Medicine (H.S., M.F.), Department of Physiological Chemistry and Metabolism, Graduate School of Medicine (K.N., S.K., H.K.), and Research Center for Advanced Science and Technology (H.A.), University of Tokyo, Tokyo, Japan; Department of Molecular Pathology, Hiroshima University Graduate School of Biomedical Sciences,
| | - Hideyuki Sakoda
- From the Department of Internal Medicine, The Institute for Adult Diseases, Asahi Life Foundation, Tokyo, Japan (A.K., T.K., S.K.); Department of Internal Medicine, Graduate School of Medicine (H.S., M.F.), Department of Physiological Chemistry and Metabolism, Graduate School of Medicine (K.N., S.K., H.K.), and Research Center for Advanced Science and Technology (H.A.), University of Tokyo, Tokyo, Japan; Department of Molecular Pathology, Hiroshima University Graduate School of Biomedical Sciences,
| | - Naohide Oue
- From the Department of Internal Medicine, The Institute for Adult Diseases, Asahi Life Foundation, Tokyo, Japan (A.K., T.K., S.K.); Department of Internal Medicine, Graduate School of Medicine (H.S., M.F.), Department of Physiological Chemistry and Metabolism, Graduate School of Medicine (K.N., S.K., H.K.), and Research Center for Advanced Science and Technology (H.A.), University of Tokyo, Tokyo, Japan; Department of Molecular Pathology, Hiroshima University Graduate School of Biomedical Sciences,
| | - Masamichi Okubo
- From the Department of Internal Medicine, The Institute for Adult Diseases, Asahi Life Foundation, Tokyo, Japan (A.K., T.K., S.K.); Department of Internal Medicine, Graduate School of Medicine (H.S., M.F.), Department of Physiological Chemistry and Metabolism, Graduate School of Medicine (K.N., S.K., H.K.), and Research Center for Advanced Science and Technology (H.A.), University of Tokyo, Tokyo, Japan; Department of Molecular Pathology, Hiroshima University Graduate School of Biomedical Sciences,
| | - Yusuke Nakatsu
- From the Department of Internal Medicine, The Institute for Adult Diseases, Asahi Life Foundation, Tokyo, Japan (A.K., T.K., S.K.); Department of Internal Medicine, Graduate School of Medicine (H.S., M.F.), Department of Physiological Chemistry and Metabolism, Graduate School of Medicine (K.N., S.K., H.K.), and Research Center for Advanced Science and Technology (H.A.), University of Tokyo, Tokyo, Japan; Department of Molecular Pathology, Hiroshima University Graduate School of Biomedical Sciences,
| | - Haruya Ono
- From the Department of Internal Medicine, The Institute for Adult Diseases, Asahi Life Foundation, Tokyo, Japan (A.K., T.K., S.K.); Department of Internal Medicine, Graduate School of Medicine (H.S., M.F.), Department of Physiological Chemistry and Metabolism, Graduate School of Medicine (K.N., S.K., H.K.), and Research Center for Advanced Science and Technology (H.A.), University of Tokyo, Tokyo, Japan; Department of Molecular Pathology, Hiroshima University Graduate School of Biomedical Sciences,
| | - Toshiaki Fukushima
- From the Department of Internal Medicine, The Institute for Adult Diseases, Asahi Life Foundation, Tokyo, Japan (A.K., T.K., S.K.); Department of Internal Medicine, Graduate School of Medicine (H.S., M.F.), Department of Physiological Chemistry and Metabolism, Graduate School of Medicine (K.N., S.K., H.K.), and Research Center for Advanced Science and Technology (H.A.), University of Tokyo, Tokyo, Japan; Department of Molecular Pathology, Hiroshima University Graduate School of Biomedical Sciences,
| | - Hideaki Kamata
- From the Department of Internal Medicine, The Institute for Adult Diseases, Asahi Life Foundation, Tokyo, Japan (A.K., T.K., S.K.); Department of Internal Medicine, Graduate School of Medicine (H.S., M.F.), Department of Physiological Chemistry and Metabolism, Graduate School of Medicine (K.N., S.K., H.K.), and Research Center for Advanced Science and Technology (H.A.), University of Tokyo, Tokyo, Japan; Department of Molecular Pathology, Hiroshima University Graduate School of Biomedical Sciences,
| | - Fusanori Nishimura
- From the Department of Internal Medicine, The Institute for Adult Diseases, Asahi Life Foundation, Tokyo, Japan (A.K., T.K., S.K.); Department of Internal Medicine, Graduate School of Medicine (H.S., M.F.), Department of Physiological Chemistry and Metabolism, Graduate School of Medicine (K.N., S.K., H.K.), and Research Center for Advanced Science and Technology (H.A.), University of Tokyo, Tokyo, Japan; Department of Molecular Pathology, Hiroshima University Graduate School of Biomedical Sciences,
| | - Takako Kikuchi
- From the Department of Internal Medicine, The Institute for Adult Diseases, Asahi Life Foundation, Tokyo, Japan (A.K., T.K., S.K.); Department of Internal Medicine, Graduate School of Medicine (H.S., M.F.), Department of Physiological Chemistry and Metabolism, Graduate School of Medicine (K.N., S.K., H.K.), and Research Center for Advanced Science and Technology (H.A.), University of Tokyo, Tokyo, Japan; Department of Molecular Pathology, Hiroshima University Graduate School of Biomedical Sciences,
| | - Midori Fujishiro
- From the Department of Internal Medicine, The Institute for Adult Diseases, Asahi Life Foundation, Tokyo, Japan (A.K., T.K., S.K.); Department of Internal Medicine, Graduate School of Medicine (H.S., M.F.), Department of Physiological Chemistry and Metabolism, Graduate School of Medicine (K.N., S.K., H.K.), and Research Center for Advanced Science and Technology (H.A.), University of Tokyo, Tokyo, Japan; Department of Molecular Pathology, Hiroshima University Graduate School of Biomedical Sciences,
| | - Koichi Nishiyama
- From the Department of Internal Medicine, The Institute for Adult Diseases, Asahi Life Foundation, Tokyo, Japan (A.K., T.K., S.K.); Department of Internal Medicine, Graduate School of Medicine (H.S., M.F.), Department of Physiological Chemistry and Metabolism, Graduate School of Medicine (K.N., S.K., H.K.), and Research Center for Advanced Science and Technology (H.A.), University of Tokyo, Tokyo, Japan; Department of Molecular Pathology, Hiroshima University Graduate School of Biomedical Sciences,
| | - Hiroyuki Aburatani
- From the Department of Internal Medicine, The Institute for Adult Diseases, Asahi Life Foundation, Tokyo, Japan (A.K., T.K., S.K.); Department of Internal Medicine, Graduate School of Medicine (H.S., M.F.), Department of Physiological Chemistry and Metabolism, Graduate School of Medicine (K.N., S.K., H.K.), and Research Center for Advanced Science and Technology (H.A.), University of Tokyo, Tokyo, Japan; Department of Molecular Pathology, Hiroshima University Graduate School of Biomedical Sciences,
| | - Sakura Kushiyama
- From the Department of Internal Medicine, The Institute for Adult Diseases, Asahi Life Foundation, Tokyo, Japan (A.K., T.K., S.K.); Department of Internal Medicine, Graduate School of Medicine (H.S., M.F.), Department of Physiological Chemistry and Metabolism, Graduate School of Medicine (K.N., S.K., H.K.), and Research Center for Advanced Science and Technology (H.A.), University of Tokyo, Tokyo, Japan; Department of Molecular Pathology, Hiroshima University Graduate School of Biomedical Sciences,
| | - Masaki Iizuka
- From the Department of Internal Medicine, The Institute for Adult Diseases, Asahi Life Foundation, Tokyo, Japan (A.K., T.K., S.K.); Department of Internal Medicine, Graduate School of Medicine (H.S., M.F.), Department of Physiological Chemistry and Metabolism, Graduate School of Medicine (K.N., S.K., H.K.), and Research Center for Advanced Science and Technology (H.A.), University of Tokyo, Tokyo, Japan; Department of Molecular Pathology, Hiroshima University Graduate School of Biomedical Sciences,
| | - Naoyuki Taki
- From the Department of Internal Medicine, The Institute for Adult Diseases, Asahi Life Foundation, Tokyo, Japan (A.K., T.K., S.K.); Department of Internal Medicine, Graduate School of Medicine (H.S., M.F.), Department of Physiological Chemistry and Metabolism, Graduate School of Medicine (K.N., S.K., H.K.), and Research Center for Advanced Science and Technology (H.A.), University of Tokyo, Tokyo, Japan; Department of Molecular Pathology, Hiroshima University Graduate School of Biomedical Sciences,
| | - Jeffrey Encinas
- From the Department of Internal Medicine, The Institute for Adult Diseases, Asahi Life Foundation, Tokyo, Japan (A.K., T.K., S.K.); Department of Internal Medicine, Graduate School of Medicine (H.S., M.F.), Department of Physiological Chemistry and Metabolism, Graduate School of Medicine (K.N., S.K., H.K.), and Research Center for Advanced Science and Technology (H.A.), University of Tokyo, Tokyo, Japan; Department of Molecular Pathology, Hiroshima University Graduate School of Biomedical Sciences,
| | - Kazuhiro Sentani
- From the Department of Internal Medicine, The Institute for Adult Diseases, Asahi Life Foundation, Tokyo, Japan (A.K., T.K., S.K.); Department of Internal Medicine, Graduate School of Medicine (H.S., M.F.), Department of Physiological Chemistry and Metabolism, Graduate School of Medicine (K.N., S.K., H.K.), and Research Center for Advanced Science and Technology (H.A.), University of Tokyo, Tokyo, Japan; Department of Molecular Pathology, Hiroshima University Graduate School of Biomedical Sciences,
| | - Narumi Ogonuki
- From the Department of Internal Medicine, The Institute for Adult Diseases, Asahi Life Foundation, Tokyo, Japan (A.K., T.K., S.K.); Department of Internal Medicine, Graduate School of Medicine (H.S., M.F.), Department of Physiological Chemistry and Metabolism, Graduate School of Medicine (K.N., S.K., H.K.), and Research Center for Advanced Science and Technology (H.A.), University of Tokyo, Tokyo, Japan; Department of Molecular Pathology, Hiroshima University Graduate School of Biomedical Sciences,
| | - Atsuo Ogura
- From the Department of Internal Medicine, The Institute for Adult Diseases, Asahi Life Foundation, Tokyo, Japan (A.K., T.K., S.K.); Department of Internal Medicine, Graduate School of Medicine (H.S., M.F.), Department of Physiological Chemistry and Metabolism, Graduate School of Medicine (K.N., S.K., H.K.), and Research Center for Advanced Science and Technology (H.A.), University of Tokyo, Tokyo, Japan; Department of Molecular Pathology, Hiroshima University Graduate School of Biomedical Sciences,
| | - Shoji Kawazu
- From the Department of Internal Medicine, The Institute for Adult Diseases, Asahi Life Foundation, Tokyo, Japan (A.K., T.K., S.K.); Department of Internal Medicine, Graduate School of Medicine (H.S., M.F.), Department of Physiological Chemistry and Metabolism, Graduate School of Medicine (K.N., S.K., H.K.), and Research Center for Advanced Science and Technology (H.A.), University of Tokyo, Tokyo, Japan; Department of Molecular Pathology, Hiroshima University Graduate School of Biomedical Sciences,
| | - Wataru Yasui
- From the Department of Internal Medicine, The Institute for Adult Diseases, Asahi Life Foundation, Tokyo, Japan (A.K., T.K., S.K.); Department of Internal Medicine, Graduate School of Medicine (H.S., M.F.), Department of Physiological Chemistry and Metabolism, Graduate School of Medicine (K.N., S.K., H.K.), and Research Center for Advanced Science and Technology (H.A.), University of Tokyo, Tokyo, Japan; Department of Molecular Pathology, Hiroshima University Graduate School of Biomedical Sciences,
| | - Yukihito Higashi
- From the Department of Internal Medicine, The Institute for Adult Diseases, Asahi Life Foundation, Tokyo, Japan (A.K., T.K., S.K.); Department of Internal Medicine, Graduate School of Medicine (H.S., M.F.), Department of Physiological Chemistry and Metabolism, Graduate School of Medicine (K.N., S.K., H.K.), and Research Center for Advanced Science and Technology (H.A.), University of Tokyo, Tokyo, Japan; Department of Molecular Pathology, Hiroshima University Graduate School of Biomedical Sciences,
| | - Hiroki Kurihara
- From the Department of Internal Medicine, The Institute for Adult Diseases, Asahi Life Foundation, Tokyo, Japan (A.K., T.K., S.K.); Department of Internal Medicine, Graduate School of Medicine (H.S., M.F.), Department of Physiological Chemistry and Metabolism, Graduate School of Medicine (K.N., S.K., H.K.), and Research Center for Advanced Science and Technology (H.A.), University of Tokyo, Tokyo, Japan; Department of Molecular Pathology, Hiroshima University Graduate School of Biomedical Sciences,
| | - Hideki Katagiri
- From the Department of Internal Medicine, The Institute for Adult Diseases, Asahi Life Foundation, Tokyo, Japan (A.K., T.K., S.K.); Department of Internal Medicine, Graduate School of Medicine (H.S., M.F.), Department of Physiological Chemistry and Metabolism, Graduate School of Medicine (K.N., S.K., H.K.), and Research Center for Advanced Science and Technology (H.A.), University of Tokyo, Tokyo, Japan; Department of Molecular Pathology, Hiroshima University Graduate School of Biomedical Sciences,
| | - Tomoichiro Asano
- From the Department of Internal Medicine, The Institute for Adult Diseases, Asahi Life Foundation, Tokyo, Japan (A.K., T.K., S.K.); Department of Internal Medicine, Graduate School of Medicine (H.S., M.F.), Department of Physiological Chemistry and Metabolism, Graduate School of Medicine (K.N., S.K., H.K.), and Research Center for Advanced Science and Technology (H.A.), University of Tokyo, Tokyo, Japan; Department of Molecular Pathology, Hiroshima University Graduate School of Biomedical Sciences,
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Osborne LC, Joyce KL, Alenghat T, Sonnenberg GF, Giacomin PR, Du Y, Bergstrom KS, Vallance BA, Nair MG. Resistin-like molecule α promotes pathogenic Th17 cell responses and bacterial-induced intestinal inflammation. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2013; 190:2292-300. [PMID: 23355735 PMCID: PMC3601830 DOI: 10.4049/jimmunol.1200706] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Resistin-like molecule (RELM)α belongs to a family of secreted mammalian proteins that have putative immunomodulatory functions. Recent studies have identified a pathogenic role for RELMα in chemically induced colitis through effects on innate cell populations. However, whether RELMα regulates intestinal adaptive immunity to enteric pathogens is unknown. In this study, we employed Citrobacter rodentium as a physiologic model of pathogenic Escherichia coli-induced diarrheal disease, colitis, and Th17 cell responses. In response to Citrobacter, RELMα expression was induced in intestinal epithelial cells, infiltrating macrophages, and eosinophils of the infected colons. Citrobacter-infected RELMα(-/-) mice exhibited reduced infection-induced intestinal inflammation, characterized by decreased leukocyte recruitment to the colons and reduced immune cell activation compared with wild-type (WT) mice. Interestingly, Citrobacter colonization and clearance were unaffected in RELMα(-/-) mice, suggesting that the immune stimulatory effects of RELMα following Citrobacter infection were pathologic rather than host-protective. Furthermore, infected RELMα(-/-) mice exhibited decreased CD4(+) T cell expression of the proinflammatory cytokine IL-17A. To directly test whether RELMα promoted Citrobacter-induced intestinal inflammation via IL-17A, infected WT and IL-17A(-/-) mice were treated with rRELMα. RELMα treatment of Citrobacter-infected WT mice exacerbated intestinal inflammation and IL-17A expression whereas IL-17A(-/-) mice were protected from RELMα-induced intestinal inflammation. Finally, infected RELMα(-/-) mice exhibited reduced levels of serum IL-23p19 compared with WT mice, and RELMα(-/-) peritoneal macrophages showed deficient IL-23p19 induction. Taken together, these data identify a proinflammatory role for RELMα in bacterial-induced colitis and suggest that the IL-23/Th17 axis is a critical mediator of RELMα-induced inflammation.
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Affiliation(s)
- Lisa C. Osborne
- Institute of Immunology, Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - Karen L. Joyce
- Institute of Immunology, Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - Theresa Alenghat
- Institute of Immunology, Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - Gregory F. Sonnenberg
- Institute of Immunology, Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - Paul R. Giacomin
- Institute of Immunology, Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - Yurong Du
- Institute of Immunology, Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - Kirk S. Bergstrom
- Child and Family Institute, University of British Columbia, Vancouver, BC
| | - Bruce A. Vallance
- Child and Family Institute, University of British Columbia, Vancouver, BC
| | - Meera G. Nair
- Institute of Immunology, Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
- Division of Biomedical Sciences, School of Medicine, University of California Riverside, Riverside, CA
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Carbohydrate Elimination or Adaptation Diet for Symptoms of Intestinal Discomfort in IBD: Rationales for "Gibsons' Conundrum". Int J Inflam 2012; 2012:493717. [PMID: 22518336 PMCID: PMC3299284 DOI: 10.1155/2012/493717] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2011] [Revised: 11/13/2011] [Accepted: 11/14/2011] [Indexed: 12/16/2022] Open
Abstract
Therapeutic use of carbohydrates in inflammatory bowel diseases (IBDs) is discussed from two theoretical, apparent diametrically opposite perspectives: regular ingestion of prebiotics or withdrawal of virtually all carbohydrate components. Pathogenesis of IBD is discussed connecting microbial flora, host immunity, and genetic interactions. The best studied genetic example, NOD2 in Crohn's disease, is highlighted as a model which encompasses these interactions and has been shown to depend on butyrate for normal function. The role of these opposing concepts in management of irritable bowel syndrome (IBS) is contrasted with what is known in IBD. The conclusion reached is that, while both approaches may alleviate symptoms in both IBS and IBD, there is insufficient data yet to determine whether both approaches lead to equivalent bacterial effects in mollifying the immune system. This is particularly relevant in IBD. As such, caution is urged to use long-term carbohydrate withdrawal in IBD in remission to control IBS-like symptoms.
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Zheng LD, Yang CL, Qi T, Qi M, Tong L, Tong QS. Effects of resistin-like molecule β over-expression on gastric cancer cells in vitro. World J Gastroenterol 2012; 18:754-66. [PMID: 22371635 PMCID: PMC3286138 DOI: 10.3748/wjg.v18.i8.754] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2011] [Revised: 01/05/2012] [Accepted: 01/18/2012] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the effects of resistin-like molecule β (RELMβ) over-expression on the invasion, metastasis and angiogenesis of gastric cancer cells.
METHODS: Human RELMβ encoding expression vector was constructed and transfected into the RELMβ lowly-expressed gastric cancer cell lines SGC-7901 and MKN-45. Gene expression was measured by Western blotting, reverse transcription polymerase chain reaction (PCR) and real-time quantitative PCR. Cell proliferation was measured by 2-(4,5-dimethyltriazol-2-yl)-2,5-diphenyl tetrazolium bromide colorimetry, colony formation and 5-ethynyl-20-deoxyuridine incorporation assays. The in vitro migration, invasion and metastasis of cancer cells were measured by cell adhesion assay, scratch assay and matrigel invasion assay. The angiogenic capabilities of cancer cells were measured by tube formation of endothelial cells.
RESULTS: Transfection of RELMβ vector into SGC-7901 and MKN-45 cells resulted in over-expression of RELMβ, which did not influence the cellular proliferation. However, over-expression of RELMβ suppressed the in vitro adhesion, invasion and metastasis of cancer cells, accompanied by decreased expression of matrix metalloproteinase-2 (MMP-2) and MMP-9. Moreover, transfection of RELMβ attenuated the expression of vascular endothelial growth factor and in vitro angiogenic capabilities of cancer cells.
CONCLUSION: Over-expression of RELMβ abolishes the invasion, metastasis and angiogenesis of gastric cancer cells in vitro, suggesting its potentials as a novel therapeutic target for gastric cancer.
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Pizarro TT, Pastorelli L, Bamias G, Garg RR, Reuter BK, Mercado JR, Chieppa M, Arseneau KO, Ley K, Cominelli F. SAMP1/YitFc mouse strain: a spontaneous model of Crohn's disease-like ileitis. Inflamm Bowel Dis 2011; 17:2566-84. [PMID: 21557393 PMCID: PMC3154989 DOI: 10.1002/ibd.21638] [Citation(s) in RCA: 134] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2010] [Accepted: 01/03/2011] [Indexed: 12/18/2022]
Abstract
The SAMP1/YitFc mouse strain represents a model of Crohn's disease (CD)-like ileitis that is ideal for investigating the pathogenesis of chronic intestinal inflammation. Different from the vast majority of animal models of colitis, the ileal-specific phenotype characteristic of SAMP1/YitFc mice occurs spontaneously, without genetic, chemical, or immunological manipulation. In addition, SAMP1/YitFc mice possess remarkable similarities to the human condition with regard to disease location, histologic features, incidence of extraintestinal manifestations, and response to conventional therapies. SAMP1/YitFc mice also display a well-defined time course of a predisease state and phases of acute and chronic ileitis. As such, the SAMP1/YitFc model is particularly suitable for elucidating pathways that precede the clinical phenotype that may lead to preventive, and therefore more efficacious, intervention with the natural course of disease, or alternatively, for the development of therapeutic strategies directed against chronic, established ileitis. In this review we summarize important contributions made by our group and others that uncover potential mechanisms in the pathogenesis of CD using this unique murine model of chronic intestinal inflammation.
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Affiliation(s)
- Theresa T Pizarro
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA.
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Croix JA, Bhatia S, Gaskins HR. Inflammatory cues modulate the expression of secretory product genes, Golgi sulfotransferases and sulfomucin production in LS174T cells. Exp Biol Med (Maywood) 2011; 236:1402-12. [PMID: 22101519 DOI: 10.1258/ebm.2011.011186] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
The signals that mediate goblet cell expression of specific mucin chemotypes are poorly defined. Animal and in vitro studies show that acidomucin chemotypes may be altered by inflammation and changes in intestinal microbiota. To examine factors that may elicit this response, human adenocarcinoma-derived LS174T cells, which have a goblet cell-like phenotype and produce both sulfo- and sialomucins, were used to examine the effects of selected microbial and host factors on expression of goblet cell secretory product genes, sulfotransferases and sulfomucin production. Expression of genes encoding mucin 2 (MUC2), resistin-like molecule β (RETNLB), and trefoil factor 3 (TFF3) and Golgi sulfotransferases, carbohydrate (N-acetylglucosamine 6-O) sulfotransferase 5 (CHST5) and galactose-3-O-sulfotransferase 2 (GAL3ST2), was measured by quantitative reverse transcriptase-polymerase chain reaction following treatment with bacterial flagellin, tumor necrosis factor α (TNF-α) or the mucogenic cytokine interleukin-13 (IL-13). Expression of the toll-like receptor 5 (TLR5) gene was also analysed. Sulfomucin expression was examined via high-iron diamide/alcian blue (HID/AB) histochemistry and immunofluorescent staining for the Sulfo Le(a) antigen, which is synthesized in part by GAL3ST2. Flagellin, IL-13 and TNF-α all significantly increased GAL3ST2, MUC2, TFF3 and TLR5 expression, while only IL-13 increased RETNLB and CHST5 expression. Based on HID/AB histochemistry, mucin sulfation was significantly increased in response to both flagellin and IL-13 but not TNF-α. Only treatment with flagellin increased the expression of the Sulfo Le(a) antigen. Collectively, these results indicate that bacterial flagellin, IL-13 and TNF-α differentially modulate the expression of goblet cell secretory product genes, sulfotransferases and sulfomucin production.
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Affiliation(s)
- Jennifer A Croix
- Division of Nutritional Sciences, University of Illinois, 1207 W. Gregory Dr. Urbana, Urbana, IL 61801, USA
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Abstract
NF-κB is well characterized as a primary mediator of inflammatory responses during infection and immune reactions, but it has recently become evident that NF-κB also mediates a potent cytoprotective, homeostatic function under basal conditions. This role is especially evident in the mammalian intestine, which is challenged not only with a range of microbial pathogens, but is also in constant contact with potent proinflammatory commensal bacteria and their products. Present data lead to the overall conclusion that antiapoptotic actions of NF-κB in intestinal epithelial cells dominate tissue responses to many acute inflammatory and injurious challenges, whereas proinflammatory and cell survival functions of NF-κB in macrophages and T cells govern chronic intestinal inflammation. This review focuses on the protective and homeostatic functions of NF-κB, and the importance of NF-κB in determining host-microbe interactions in the intestinal tract.
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Affiliation(s)
- Lars Eckmann
- Department of Medicine, University of California, 9500 Gilman Drive, La Jolla, San Diego, CA 92093-0063, USA.
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