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Chen H, Li Q, Gao T, Wang Y, Ren X, Liu S, Zhang S, Zhou P, Lyu J, Bai H, Wang Y. Causal role of immune cells in inflammatory bowel disease: A Mendelian randomization study. Medicine (Baltimore) 2024; 103:e37537. [PMID: 38579066 PMCID: PMC10994490 DOI: 10.1097/md.0000000000037537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/06/2024] [Accepted: 02/16/2024] [Indexed: 04/07/2024] Open
Abstract
Inflammatory bowel disease (IBD) is characterized by an inflammatory response closely related to the immune system, but the relationship between inflammation and IBD remains unclear. We performed a comprehensive 2-sample Mendelian randomization (MR) analysis to determine the causal relationship between immune cell characteristics and IBD. Using publicly available genetic data, we explored the relationship between 731 immune cell characteristics and IBD risk. Inverse-variance weighting was the primary analytical method. To test the robustness of the results, we used the weighted median-based, MR-Egger, simple mode, and mode-based methods. Finally, we performed a reverse MR analysis to assess the possibility of reverse causality. We identified suggestive associations between 2 immune cell traits and IBD risk (P = 4.18 × 10-5 for human leukocyte antigen-DR on CD14+ monocytes, OR: 0.902; 95% CI: 0.859-0.947; for CD39+ CD4+ T cells, P = 6.24 × 10-5; OR: 1.042; 95% CI: 1.021-1.063). Sensitivity analysis results of these immune cell traits were consistent. In reverse MR analysis, we found no statistically significant association between IBD and these 2 cell traits. Our study demonstrates the close connection between immune cells and IBD using MR, providing guidance for future clinical and basic research.
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Affiliation(s)
- Haoyu Chen
- School of Graduate, Hebei University of Chinese Medicine, Hebei, Shijiazhuang, China
| | - Qi Li
- School of Graduate, Hebei University of Chinese Medicine, Hebei, Shijiazhuang, China
| | - Tianyu Gao
- School of Graduate, Hebei University of Chinese Medicine, Hebei, Shijiazhuang, China
| | - Yuhua Wang
- School of Graduate, Hebei University of Chinese Medicine, Hebei, Shijiazhuang, China
| | - Xuetong Ren
- School of Graduate, Hebei University of Chinese Medicine, Hebei, Shijiazhuang, China
| | - Shaowei Liu
- School of Graduate, Hebei University of Chinese Medicine, Hebei, Shijiazhuang, China
| | - Shixiong Zhang
- School of Graduate, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
| | - Pingping Zhou
- Department of Gastroenterology, Hebei Province Hospital of Chinese Medicine, Shijiazhuang, China
| | - Jingjing Lyu
- Department of Gastroenterology, Hebei Province Hospital of Chinese Medicine, Shijiazhuang, China
| | - Haiyan Bai
- Department of Gastroenterology, Hebei Province Hospital of Chinese Medicine, Shijiazhuang, China
| | - Yangang Wang
- School of Graduate, Hebei University of Chinese Medicine, Hebei, Shijiazhuang, China
- Department of Gastroenterology, Beijing University of Chinese Medicine, Third Affiliated Hospital, Beijing, China
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2
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Nguyen OTP, Misun PM, Hierlemann A, Lohasz C. A Versatile Intestine-on-Chip System for Deciphering the Immunopathogenesis of Inflammatory Bowel Disease. Adv Healthc Mater 2024; 13:e2302454. [PMID: 38253407 DOI: 10.1002/adhm.202302454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2023] [Revised: 12/21/2023] [Indexed: 01/24/2024]
Abstract
The multifactorial nature of inflammatory bowel disease (IBD) necessitates reliable and practical experimental models to elucidate its etiology and pathogenesis. To model the intestinal microenvironment at the onset of IBD in vitro, it is important to incorporate relevant cellular and noncellular components before inducing stepwise pathogenic developments. A novel intestine-on-chip system for investigating multiple aspects of IBD's immunopathogenesis is presented. The system includes an array of tight and polarized barrier models formed from intestinal epithelial cells on an in-vivo-like subepithelial matrix within one week. The dynamic remodeling of the subepithelial matrix by cells or their secretome demonstrates the physiological relevance of the on-chip barrier models. The system design enables introduction of various immune cell types and inflammatory stimuli at specific locations in the same barrier model, which facilitates investigations of the distinct roles of each cell type in intestinal inflammation development. It is showed that inflammatory behavior manifests in an upregulated expression of inflammatory markers and cytokines (TNF-α). The neutralizing effect of the anti-inflammatory antibody Infliximab on levels of TNF-α and its inducible cytokines could be explicitly shown. Overall, an innovative approach to systematically developing a microphysiological system to comprehend immune-system-mediated disorders of IBD and to identify new therapeutic strategies is presented.
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Affiliation(s)
- Oanh T P Nguyen
- Bio Engineering Laboratory, Department of Biosystems Science and Engineering, ETH Zurich, Klingelbergstrasse 48, Basel, CH-4056, Switzerland
| | - Patrick M Misun
- Bio Engineering Laboratory, Department of Biosystems Science and Engineering, ETH Zurich, Klingelbergstrasse 48, Basel, CH-4056, Switzerland
| | - Andreas Hierlemann
- Bio Engineering Laboratory, Department of Biosystems Science and Engineering, ETH Zurich, Klingelbergstrasse 48, Basel, CH-4056, Switzerland
| | - Christian Lohasz
- Bio Engineering Laboratory, Department of Biosystems Science and Engineering, ETH Zurich, Klingelbergstrasse 48, Basel, CH-4056, Switzerland
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3
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Peng H, Lv Y, Li C, Cheng Z, He S, Wang C, Liu J. Cathepsin S inhibition in dendritic cells prevents Th17 cell differentiation in perivascular adipose tissues following vascular injury in diabetic rats. J Biochem Mol Toxicol 2023; 37:e23419. [PMID: 37341014 DOI: 10.1002/jbt.23419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 05/25/2023] [Accepted: 06/08/2023] [Indexed: 06/22/2023]
Abstract
In the context of diabetes mellitus (DM), the circulating cathepsin S (CTSS) level is significantly higher in the cardiovascular disease group. Therefore, this study was designed to investigate the role of CTSS in restenosis following carotid injury in diabetic rats. To induce DM, 60 mg/kg of streptozotocin (STZ) in citrate buffer was injected intraperitoneally into Sprague-Dawley rats. After successful modeling of DM, wire injury of the rat carotid artery was performed, followed by adenovirus transduction. Levels of blood glucose and Th17 cell surface antigens including ROR-γt, IL-17A, IL-17F, IL-22, and IL-23 in perivascular adipose tissues (PVAT) were evaluated. For in vitro analysis, human dendritic cells (DCs) were treated with 5.6-25 mM glucose for 24 h. The morphology of DCs was observed using an optical microscope. CD4+ T cells derived from human peripheral blood mononuclear cells were cocultured with DCs for 5 days. Levels of IL-6, CTSS, ROR-γt, IL-17A, IL-17F, IL-22 and IL-23 were measured. Flow cytometry was conducted to detect DC surface biomarkers (CD1a, CD83, and CD86) and Th17 cell differentiation. The collected DCs presented a treelike shape and were positive for CD1a, CD83, and CD86. Glucose impaired DC viability at the dose of 35 mM. Glucose treatment led to an increase in CTSS and IL-6 expression in DCs. Glucose-treated DCs promoted the differentiation of Th17 cells. CTSS depletion downregulated IL-6 expression and inhibited Th17 cell differentiation in vitro and in vivo. CTSS inhibition in DCs inhibits Th17 cell differentiation in PVAT tissues from diabetic rats following vascular injury.
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Affiliation(s)
- Hongyu Peng
- Department of Cardiology, Beijing Anzhen Hospital, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Capital Medical University, Beijing, China
| | - Yuan Lv
- Department of Cardiology, Beijing Anzhen Hospital, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Capital Medical University, Beijing, China
| | - Changjiang Li
- Department of Cardiology, Beijing Anzhen Hospital, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Capital Medical University, Beijing, China
| | - Zichao Cheng
- Department of Cardiology, Beijing Anzhen Hospital, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Capital Medical University, Beijing, China
| | - Songyuan He
- Department of Cardiology, Beijing Anzhen Hospital, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Capital Medical University, Beijing, China
| | - Cong Wang
- Department of Cardiology, Beijing Anzhen Hospital, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Capital Medical University, Beijing, China
| | - Jinghua Liu
- Department of Cardiology, Beijing Anzhen Hospital, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Capital Medical University, Beijing, China
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4
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Saber MM, Monir N, Awad AS, Elsherbiny ME, Zaki HF. TLR9: A friend or a foe. Life Sci 2022; 307:120874. [PMID: 35963302 DOI: 10.1016/j.lfs.2022.120874] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 08/05/2022] [Accepted: 08/06/2022] [Indexed: 10/15/2022]
Abstract
The innate immune system is a primary protective line in our body. It confers its protection through different pattern recognition receptors (PRRs), especially toll like receptors (TLRs). Toll like receptor 9 (TLR9) is an intracellular TLR, expressed in different immunological and non-immunological cells. Release of cellular components, such as proteins, nucleotides, and DNA confers a beneficial inflammatory response and maintains homeostasis for removing cellular debris during normal physiological conditions. However, during pathological cellular damage and stress signals, engagement between mtDNA and TLR9 acts as an alarm for starting inflammatory and autoimmune disorders. The controversial role of TLR9 in different diseases baffled scientists if it has a protective or deleterious effect after activation during insults. Targeting the immune system, especially the TLR9 needs further investigation to provide a therapeutic strategy to control inflammation and autoimmune disorders.
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Affiliation(s)
- Mona M Saber
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University, Giza, Egypt.
| | - Nada Monir
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Ahram Canadian University, Giza, Egypt
| | - Azza S Awad
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Ahram Canadian University, Giza, Egypt
| | - Marwa E Elsherbiny
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Ahram Canadian University, Giza, Egypt
| | - Hala F Zaki
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University, Giza, Egypt
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Singh G, Haileselassie Y, Ji AR, Maecker HT, Sinha SR, Brim H, Habtezion A, Ashktorab H. Protective Effect of Saffron in Mouse Colitis Models Through Immune Modulation. Dig Dis Sci 2022; 67:2922-2935. [PMID: 34275090 DOI: 10.1007/s10620-021-07163-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Accepted: 07/06/2021] [Indexed: 12/17/2022]
Abstract
BACKGROUND People with inflammatory bowel disease (IBD) including ulcerative colitis are at risk for colorectal cancer. Despite available effective drugs used to treat IBD, many patients fail or lose response over time with some displaying drug-induced adverse events. Saffron (Crocus sativus) has been reported to have anti-inflammatory properties. Its protective role in IBD has not been explored extensively. AIM To establish whether saffron treatment alleviates inflammation in experimental colitis. METHODS Colitis was induced in C57BL/6 mice with 3% DSS and treated with either saffron doses (7.5, 15, 20, 25 mg/kg body weight) or vehicle through daily gavage. On day 11, mice were euthanized and analyzed for gross and microscopic inflammation. Distal colon segments were collected for mRNA and protein expression of HO-1 protein and GPX2, (the downstream targets of NRF-2). Nrf-2 translocation from cytosol to nucleus was confirmed by immunofluorescence, and further Nrf-2 protein expression in nuclear and cytosolic fraction of colon was analyzed by immunoblot. Immune cells were isolated from the lamina propria of mouse colon for flow cytometry-based immunophenotyping. Colitis was also induced in C57BL/6 Ahr knockout and wild type mice to explore the involvement of Ahr-dependent pathways in saffron's protective effect(s). The therapeutic effect of saffron was further validated in another TNBS model of colitis. RESULTS Saffron 20 mg/kg body weight showed improved colon gross and histology features and led to better body weight, colon length, histology score, and reduced disease activity index (DAI). Saffron significantly decreased pro-inflammatory macrophages (M1), while increasing anti-inflammatory macrophages (M2) and IL10 + dendritic cells. Saffron treatment also enhanced CD3 + T and CD3 + CD8 + T cells followed by increase in different CD3 + CD4 + T cells subsets like CD25 + T cells, FoxP3 + CD25 + regulatory T cells, and CD4 + FOXP3 + CD25-regulatory T cells. Immunoblot analysis showed a significant increase in HO-1/GPX2 protein expression. With saffron treatment, Nrf-2 translocation into nucleus from cytosol also supports the involvement of Nrf-2 and its downstream targets in the protective effect of saffron. Further, we demonstrated that saffron in part exert anti-inflammatory effect through activation of aryl hydrocarbon receptor (AhR)-nuclear factor erythroid 2-related factor 2 (Nrf2)-dependent pathways. CONCLUSION These data demonstrate saffron's therapeutic potential and its protective role in part via Ahr/Nrf-2 pathways and regulatory innate and adaptive immune cells.
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Affiliation(s)
- Gulshan Singh
- Gastroenterology Division and Hepatology, School of Medicine, Stanford University, Palo Alto, CA, USA
| | - Yeneneh Haileselassie
- Gastroenterology Division and Hepatology, School of Medicine, Stanford University, Palo Alto, CA, USA
| | - Allison Ruoheng Ji
- Gastroenterology Division and Hepatology, School of Medicine, Stanford University, Palo Alto, CA, USA
| | - Holden Terry Maecker
- Microbiology & Immunology, Human Immune Monitoring Center, Stanford University, Palo Alto, CA, USA
| | - Sidhartha R Sinha
- Gastroenterology Division and Hepatology, School of Medicine, Stanford University, Palo Alto, CA, USA
| | - Hassan Brim
- Department of Pathology, Howard University College of Medicine, Washington, DC, USA
| | - Aida Habtezion
- Gastroenterology Division and Hepatology, School of Medicine, Stanford University, Palo Alto, CA, USA
| | - Hassan Ashktorab
- Department of Medicine and Cancer Center, Howard University College of Medicine, Washington, DC, USA.
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6
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Binienda A, Ziolkowska S, Hauge IH, Salaga M. The Role of Immune and Epithelial Stem Cells in Inflammatory Bowel Disease Therapy. Curr Drug Targets 2021; 21:1405-1416. [PMID: 32364073 DOI: 10.2174/1389450121666200504074922] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 01/17/2020] [Accepted: 03/27/2020] [Indexed: 12/13/2022]
Abstract
BACKGROUND Inflammatory Bowel Disease (IBD) is categorized as Crohn's disease (CD) and Ulcerative colitis (UC) and is characterized by chronic inflammation in the gastrointestinal (GI) tract. Relapsing symptoms, including abdominal pain, increased stool frequency, loss of appetite as well as anemia contribute to significant deterioration of quality of life. IBD treatment encompasses chemotherapy (e.g. corticosteroids, thiopurines) and biological agents (e.g. antibodies targeting tumour necrosis factor α, interleukin 12/23) and surgery. However, efficacy of these therapies is not satisfactory. Thus, scientists are looking for new options in IBD treatment that could induce and maintain remission. OBJECTIVE To summarize previous knowledge about role of different intestinal cells in IBD pathophysiology and application of stem cells in the IBD treatment. RESULTS Recent studies have emphasized an important role of innate lymphoid cells (ILCs) as well as intestinal epithelial cells (IECs) in the IBD pathophysiology suggesting that these types of cells can be new targets for IBD treatment. Moreover, last studies show that stem cells transplantation reduces inflammation in patients suffering from IBD, which are resistant to conventional therapies. CONCLUSION Both hematopoietic stem cells (HSCs) and mesenchymal stem cells (MSCs) are able to restore damaged tissue and regulate the immune system. Autologous HSCs transplantation eliminates autoreactive cells and replace them with new T-cells resulting a long-time remission. Whereas MSCs transplantation is effective therapy in one of the major complications of IBD, perianal fistulas.
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Affiliation(s)
- Agata Binienda
- Department of Biochemistry, Faculty of Medicine, Medical University of Lodz, Mazowiecka 6/8, 92-215 Lodz, Poland
| | - Sylwia Ziolkowska
- Department of Biochemistry, Faculty of Medicine, Medical University of Lodz, Mazowiecka 6/8, 92-215 Lodz, Poland
| | - Ingvild H Hauge
- Department of Biochemistry, Faculty of Medicine, Medical University of Lodz, Mazowiecka 6/8, 92-215 Lodz, Poland
| | - Maciej Salaga
- Department of Biochemistry, Faculty of Medicine, Medical University of Lodz, Mazowiecka 6/8, 92-215 Lodz, Poland
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7
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Quercetin Administration Suppresses the Cytokine Storm in Myeloid and Plasmacytoid Dendritic Cells. Int J Mol Sci 2021; 22:ijms22158349. [PMID: 34361114 PMCID: PMC8348289 DOI: 10.3390/ijms22158349] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 07/30/2021] [Accepted: 07/30/2021] [Indexed: 12/27/2022] Open
Abstract
Dendritic cells (DCs) can be divided by lineage into myeloid dendritic cells (mDCs) and plasmacytoid dendritic cells (pDCs). They both are present in mucosal tissues and regulate the immune response by secreting chemokines and cytokines. Inflammatory bowel diseases (IBDs) are characterized by a leaky intestinal barrier and the consequent translocation of bacterial lipopolysaccharide (LPS) to the basolateral side. This results in DCs activation, but the response of pDCs is still poorly characterized. In the present study, we compared mDCs and pDCs responses to LPS administration. We present a broad panel of DCs secreted factors, including cytokines, chemokines, and growth factors. Our recent studies demonstrated the anti-inflammatory effects of quercetin administration, but to date, there is no evidence about quercetin’s effects on pDCs. The results of the present study demonstrate that pDCs can respond to LPS and that quercetin exposure modulates soluble factors release through the same molecular pathway used by mDCs (Slpi, Hmox1, and AP-1).
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8
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Yin H, Yang L, Peng G, Yang K, Mi Y, Hu X, Hao X, Jiao Y, Wang X, Wang Y. The commensal consortium of the gut microbiome is associated with favorable responses to anti-programmed death protein 1 (PD-1) therapy in thoracic neoplasms. Cancer Biol Med 2021; 18:j.issn.2095-3941.2020.0450. [PMID: 33960176 PMCID: PMC8610161 DOI: 10.20892/j.issn.2095-3941.2020.0450] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Accepted: 12/09/2020] [Indexed: 12/01/2022] Open
Abstract
OBJECTIVE Immune checkpoint inhibitors have revolutionized cancer therapy for multiple types of solid tumors, but as expected, a large percentage of patients do not show durable responses. Biomarkers that can predict clinical responses to immunotherapies at diagnosis are therefore urgently needed. Herein, we determined the associations between baseline gut commensal microbes and the clinical treatment efficiencies of patients with thoracic neoplasms during anti-programmed death protein 1 (PD-1) therapy. METHODS Forty-two patients with advanced thoracic carcinoma who received anti-PD-1 treatment were enrolled in the study. Baseline and time-serial stool samples were analyzed using 16S ribosomal RNA gene sequencing. Tumor responses, patient progression-free survival, and overall survival were used to measure clinical outcomes. RESULTS The diversities of the baseline gut microbiota were similar between responders (n = 23) and nonresponders (n = 19). The relative abundances of the Akkermansiaceae, Enterococcaceae, Enterobacteriaceae, Carnobacteriaceae and Clostridiales Family XI bacterial families were significantly higher in the responder group. These 5 bacterial families acted as a commensal consortium and better stratified patients according to clinical responses (P = 0.014). Patients with a higher abundance of commensal microbes had prolonged PFS (P = 0.00016). Using multivariable analysis, the abundance of the commensal consortium was identified as an independent predictor of anti-PD-1 immunotherapy in thoracic neoplasms (hazard ratio: 0.17; 95% confidence interval: 0.05-0.55; P = 0.003). CONCLUSIONS Baseline gut microbiota may have a critical impact on anti-PD-1 treatment in thoracic neoplasms. The abundance of gut commensal microbes at diagnosis might be useful for the early prediction of anti-PD-1 immunotherapy responses.
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Affiliation(s)
- Huihui Yin
- State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Lu Yang
- Department of Medical Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Gongxin Peng
- Center for Bioinformatics, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & School of Basic Medicine, Peking Union Medical College, Beijing 100021, China
| | - Ke Yang
- Department of Medical Oncology, Cancer Hospital of Huanxing Chaoyang District Beijing, Beijing 100122, China
| | - Yuling Mi
- Department of Medical Oncology, Chaoyang Sanhuan Cancer Hospital, Beijing 100021, China
| | - Xingsheng Hu
- Department of Medical Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Xuezhi Hao
- Department of Medical Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Yuchen Jiao
- State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Xiaobing Wang
- State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Yan Wang
- Department of Medical Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
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Michaelis L, Treß M, Löw HC, Klees J, Klameth C, Lange A, Grießhammer A, Schäfer A, Menz S, Steimle A, Schulze-Osthoff K, Frick JS. Gut Commensal-Induced IκBζ Expression in Dendritic Cells Influences the Th17 Response. Front Immunol 2021; 11:612336. [PMID: 33542719 PMCID: PMC7851057 DOI: 10.3389/fimmu.2020.612336] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 11/30/2020] [Indexed: 12/26/2022] Open
Abstract
Intestinal commensal bacteria can have a large impact on the state of health and disease of the host. Regulation of Th17 cell development by gut commensals is known to contribute to their dichotomous role in promoting gut homeostasis and host defense, or development of autoimmune diseases. Yet, the underlying mechanisms remain to be fully elucidated. One candidate factor contributing to Th17 differentiation, and the expression of which could be influenced by commensals is the atypical nuclear IκB protein IκBζ. IκBζ acts as a transcriptional regulator of the expression of Th17-related secondary response genes in many cell types including dendritic cells (DCs). Insights into the regulation of IκBζ in DCs could shed light on how these immune sentinel cells at the interface between commensals, innate and adaptive immune system drive an immune-tolerogenic or inflammatory Th17 cell response. In this study, the influence of two gut commensals of low (Bacteroides vulgatus) or high (Escherichia coli) immunogenicity on IκBζ expression in DCs and its downstream effects was analyzed. We observed that the amount of IκBζ expression and secretion of Th17-inducing cytokines correlated with the immunogenicity of these commensals. However, under immune-balanced conditions, E. coli also strongly induced an IκBζ-dependent secretion of anti-inflammatory IL-10, facilitating a counter-regulative Treg response as assessed in in vitro CD4+ T cell polarization assays. Yet, in an in vivo mouse model of T cell-induced colitis, prone to inflammatory and autoimmune conditions, administration of E. coli promoted an expansion of rather pro-inflammatory T helper cell subsets whereas administration of B. vulgatus resulted in the induction of protective T helper cell subsets. These findings might contribute to the development of new therapeutic strategies for the treatment of autoimmune diseases using commensals or commensal-derived components.
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Affiliation(s)
- Lena Michaelis
- Department for Medical Microbiology and Hygiene, Interfaculty Institute for Microbiology and Infection Medicine, University of Tübingen, Tübingen, Germany
| | - Marcel Treß
- Department for Medical Microbiology and Hygiene, Interfaculty Institute for Microbiology and Infection Medicine, University of Tübingen, Tübingen, Germany
| | - Hanna-Christine Löw
- Department for Medical Microbiology and Hygiene, Interfaculty Institute for Microbiology and Infection Medicine, University of Tübingen, Tübingen, Germany
| | - Johanna Klees
- Department for Medical Microbiology and Hygiene, Interfaculty Institute for Microbiology and Infection Medicine, University of Tübingen, Tübingen, Germany
| | - Christian Klameth
- Department for Medical Microbiology and Hygiene, Interfaculty Institute for Microbiology and Infection Medicine, University of Tübingen, Tübingen, Germany
| | - Anna Lange
- Department for Medical Microbiology and Hygiene, Interfaculty Institute for Microbiology and Infection Medicine, University of Tübingen, Tübingen, Germany
| | - Anne Grießhammer
- Department for Medical Microbiology and Hygiene, Interfaculty Institute for Microbiology and Infection Medicine, University of Tübingen, Tübingen, Germany
| | - Andrea Schäfer
- Department for Medical Microbiology and Hygiene, Interfaculty Institute for Microbiology and Infection Medicine, University of Tübingen, Tübingen, Germany
| | - Sarah Menz
- Department for Medical Microbiology and Hygiene, Interfaculty Institute for Microbiology and Infection Medicine, University of Tübingen, Tübingen, Germany
| | - Alex Steimle
- Department for Medical Microbiology and Hygiene, Interfaculty Institute for Microbiology and Infection Medicine, University of Tübingen, Tübingen, Germany.,Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg
| | | | - Julia-Stefanie Frick
- Department for Medical Microbiology and Hygiene, Interfaculty Institute for Microbiology and Infection Medicine, University of Tübingen, Tübingen, Germany
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10
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Engevik MA, Ruan W, Esparza M, Fultz R, Shi Z, Engevik KA, Engevik AC, Ihekweazu FD, Visuthranukul C, Venable S, Schady DA, Versalovic J. Immunomodulation of dendritic cells by Lactobacillus reuteri surface components and metabolites. Physiol Rep 2021; 9:e14719. [PMID: 33463911 PMCID: PMC7814497 DOI: 10.14814/phy2.14719] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Revised: 12/16/2020] [Accepted: 12/17/2020] [Indexed: 01/03/2023] Open
Abstract
BACKGROUND Lactic acid bacteria are commensal members of the gut microbiota and are postulated to promote host health. Secreted factors and cell surface components from Lactobacillus species have been shown to modulate the host immune system. However, the precise role of L. reuteri secreted factors and surface proteins in influencing dendritic cells (DCs) remains uncharacterized. HYPOTHESIS We hypothesize that L. reuteri secreted factors will promote DC maturation, skewing cells toward an anti-inflammatory phenotype. In acute colitis, we speculate that L. reuteri promotes IL-10 and dampens pro-inflammatory cytokine production, thereby improving colitis. METHODS & RESULTS Mouse bone marrow-derived DCs were differentiated into immature dendritic cells (iDCs) via IL-4 and GM-CSF stimulation. iDCs exposed to L. reuteri secreted factors or UV-irradiated bacteria exhibited greater expression of DC maturation markers CD83 and CD86 by flow cytometry. Additionally, L. reuteri stimulated DCs exhibited phenotypic maturation as denoted by cytokine production, including anti-inflammatory IL-10. Using mouse colonic organoids, we found that the microinjection of L. reuteri secreted metabolites and UV-irradiated bacteria was able to promote IL-10 production by DCs, indicating potential epithelial-immune cross-talk. In a TNBS-model of acute colitis, L. reuteri administration significantly improved histological scoring, colonic cytokine mRNA, serum cytokines, and bolstered IL-10 production. CONCLUSIONS Overall these data demonstrate that both L. reuteri secreted factors and its bacterial components are able to promote DC maturation. This work points to the specific role of L. reuteri in modulating intestinal DCs. NEW & NOTEWORTHY Lactobacillus reuteri colonizes the mammalian gastrointestinal tract and exerts beneficial effects on host health. However, the mechanisms behind these effects have not been fully explored. In this article, we identified that L. reuteri ATTC PTA 6475 metabolites and surface components promote dendritic cell maturation and IL-10 production. In acute colitis, we also demonstrate that L. reuteri can promote IL-10 and suppress inflammation. These findings may represent a crucial mechanism for maintaining intestinal immune homeostasis.
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Affiliation(s)
- Melinda A Engevik
- Department of Pathology and Immunology, Baylor College of Medicine, Houston, TX, USA.,Department of Pathology, Texas Children's Hospital, Houston, TX, USA
| | - Wenly Ruan
- Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA.,Section of Gastroenterology, Hepatology, and Nutrition, Texas Children's Hospital, Houston, TX, USA
| | - Magdalena Esparza
- Department of Pathology and Immunology, Baylor College of Medicine, Houston, TX, USA.,Department of Pathology, Texas Children's Hospital, Houston, TX, USA
| | - Robert Fultz
- Department of Neuroscience, Cell Biology and Anatomy, University of Texas Medical Branch, Galveston, TX, USA
| | - Zhongcheng Shi
- Department of Pathology and Immunology, Baylor College of Medicine, Houston, TX, USA.,Department of Pathology, Texas Children's Hospital, Houston, TX, USA
| | - Kristen A Engevik
- Department of Molecular Virology & Microbiology, Baylor College of Medicine, Houston, TX, USA
| | - Amy C Engevik
- Department of Surgery, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Faith D Ihekweazu
- Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA.,Section of Gastroenterology, Hepatology, and Nutrition, Texas Children's Hospital, Houston, TX, USA
| | - Chonnikant Visuthranukul
- Department of Pathology and Immunology, Baylor College of Medicine, Houston, TX, USA.,Pediatric Nutrition Research Unit, Department of Pediatrics, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Susan Venable
- Department of Pathology and Immunology, Baylor College of Medicine, Houston, TX, USA.,Department of Pathology, Texas Children's Hospital, Houston, TX, USA
| | - Deborah A Schady
- Department of Pathology and Immunology, Baylor College of Medicine, Houston, TX, USA.,Department of Pathology, Texas Children's Hospital, Houston, TX, USA
| | - James Versalovic
- Department of Pathology and Immunology, Baylor College of Medicine, Houston, TX, USA.,Department of Pathology, Texas Children's Hospital, Houston, TX, USA
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11
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Pathak M, Lal G. The Regulatory Function of CCR9 + Dendritic Cells in Inflammation and Autoimmunity. Front Immunol 2020; 11:536326. [PMID: 33123124 PMCID: PMC7566413 DOI: 10.3389/fimmu.2020.536326] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 08/13/2020] [Indexed: 12/26/2022] Open
Abstract
Chemokine receptor CCR9 is a G protein–coupled receptor and expressed on several types of immune cells, including dendritic cells (DCs), CD4+ T cells, and B cells. CCR9 drives the migration of immune cells to gradients of its cognate ligand CCL25. The chemokine CCL25 is mostly produced by gut and thymic epithelial cells. Gut- and thymic-homing DCs are known to express CCR9, and these cells are predominantly localized in the gut lining and thymus. CCR9+ DCs are implicated in regulating inflammation, food allergy, alloimmunity, and autoimmunity. Differential interaction of CCR9+ DCs with lymphoid and myeloid cells in the thymus, secondary lymphoid tissues, and mucosal sites offer crucial insights to immune regulation. In this review, we examine the phenotypes, distributions, and interactions of CCR9+ DCs with other immune cells, elucidating their functions and role in inflammation and autoimmunity.
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Affiliation(s)
- Manisha Pathak
- Laboratory of Autoimmunity and Tolerance, National Centre for Cell Science, Pune, India
| | - Girdhari Lal
- Laboratory of Autoimmunity and Tolerance, National Centre for Cell Science, Pune, India
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12
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Chen F, Yin YT, Zhao HM, Wang HY, Zhong YB, Long J, Liu DY. Sishen Pill Treatment of DSS-Induced Colitis via Regulating Interaction With Inflammatory Dendritic Cells and Gut Microbiota. Front Physiol 2020; 11:801. [PMID: 32754049 PMCID: PMC7381313 DOI: 10.3389/fphys.2020.00801] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Accepted: 06/16/2020] [Indexed: 12/16/2022] Open
Abstract
Sishen Pill (SSP) is a typical prescription in the pharmacopeia of traditional Chinese medicine (TCM), and is usually used to treat inflammatory bowel disease (IBD). It is known that inflammatory dendritic cells (DCs) and imbalance of gut microbiota play significant roles in the pathogenesis of IBD. However, it is not clear whether SSP can treat IBD by regulating interaction of DCs and gut microbiota. In the present study, the levels of inflammatory DCs and gut microbiota were analyzed by flow cytometry and 16S rDNA analysis. SSP relieved the pathological damage to the colon of mice with colitis induced by dextran sodium sulfate (DSS). As typical indicators of inflammatory DCs, the levels of CD11c+CD103+E-cadherin+ cells and pro-inflammatory cytokines [interleukin (IL)-1β, -4, -9, and -17A] were decreased in mice with colitis treated by SSP for 10 days. Simultaneously, the gut microbiota composition was regulated, and beneficial bacteria were increased and pathogenic bacteria were reduced. The results indicated that SSP regulated the interaction between inflammatory DCs and gut microbiota to treat DSS-induced colitis.
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Affiliation(s)
- Fang Chen
- Department of Postgraduate, Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Yu-Ting Yin
- School of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Hai-Mei Zhao
- College of Traditional Chinese Medicine, Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Hai-Yan Wang
- Party and School Office, Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - You-Bao Zhong
- Department of Postgraduate, Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Jian Long
- Department of Postgraduate, Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Duan-Yong Liu
- Science and Technology College, Jiangxi University of Traditional Chinese Medicine, Nanchang, China.,Formula-Pattern Research Center of Jiangxi, Nanchang, China
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13
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Sarron E, Pérot M, Barbezier N, Delayre-Orthez C, Gay-Quéheillard J, Anton PM. Early exposure to food contaminants reshapes maturation of the human brain-gut-microbiota axis. World J Gastroenterol 2020; 26:3145-3169. [PMID: 32684732 PMCID: PMC7336325 DOI: 10.3748/wjg.v26.i23.3145] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 05/12/2020] [Accepted: 05/29/2020] [Indexed: 02/06/2023] Open
Abstract
Early childhood growth and development is conditioned by the consecutive events belonging to perinatal programming. This critical window of life will be very sensitive to any event altering programming of the main body functions. Programming of gut function, which is starting right after conception, relates to a very well-established series of cellular and molecular events associating all types of cells present in this organ, including neurons, endocrine and immune cells. At birth, this machinery continues to settle with the establishment of extra connection between enteric and other systemic systems and is partially under the control of gut microbiota activity, itself being under the densification and the diversification of microorganisms’ population. As thus, any environmental factor interfering on this pre-established program may have a strong incidence on body functions. For all these reasons, pregnant women, fetuses and infants will be particularly susceptible to environmental factors and especially food contaminants. In this review, we will summarize the actual understanding of the consequences of repeated low-level exposure to major food contaminants on gut homeostasis settlement and on brain/gut axis communication considering the pivotal role played by the gut microbiota during the fetal and postnatal stages and the presumed consequences of these food toxicants on the individuals especially in relation with the risks of developing later in life non-communicable chronic diseases.
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Affiliation(s)
- Elodie Sarron
- Transformations and Agroressources (EA 7519), Institut Polytechnique UniLaSalle, Université d'Artois, Beauvais 60026, France
| | - Maxime Pérot
- Transformations and Agroressources (EA 7519), Institut Polytechnique UniLaSalle, Université d'Artois, Beauvais 60026, France
| | - Nicolas Barbezier
- Transformations and Agroressources (EA 7519), Institut Polytechnique UniLaSalle, Université d'Artois, Beauvais 60026, France
| | - Carine Delayre-Orthez
- Transformations and Agroressources (EA 7519), Institut Polytechnique UniLaSalle, Université d'Artois, Beauvais 60026, France
| | - Jérôme Gay-Quéheillard
- Périnatalité et risques Toxiques, UMR-I-01, Université de Picardie Jules Verne, Amiens 80000, France
| | - Pauline M Anton
- Transformations and Agroressources (EA 7519), Institut Polytechnique UniLaSalle, Université d'Artois, Beauvais 60026, France
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14
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Paeoniflorin ameliorates ulcerative colitis by modulating the dendritic cell-mediated T H17/T reg balance. Inflammopharmacology 2020; 28:1705-1716. [PMID: 32472435 PMCID: PMC7572351 DOI: 10.1007/s10787-020-00722-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2019] [Accepted: 05/11/2020] [Indexed: 02/07/2023]
Abstract
Immunological tolerance is critical for maintaining gut homeostasis. An imbalance between interleukin-17 (IL-17)-producing T helper 17 (TH17) cells and regulatory T cells (Treg cells) is involved in ulcerative colitis (UC) pathogenesis. Dendritic cells (DCs) are able to induce T cell differentiation. Paeoniflorin (PF) is a monoterpene glucoside that is commonly used for treatment of autoimmune disease. However, the immunological mechanism of PF involvement in UC treatment is unclear. The present study aimed to explore whether PF can restore the TH17/Treg balance by modulating DCs. The effects of PF on DCs, TH17 cells and Treg cells were measured. Furthermore, PF-treated DCs were injected into mice with 2,4,6-trinitrobenzenesulfonic acid (TNBS)-induced colitis. PF inhibited MHC-II and CD86 expression on the DC surface (P < 0.05), decreased interleukin (IL)-12 secretion in vitro and in vivo (P < 0.05), and restored the TH17/Treg ratio in the mouse model of colitis (P < 0.05). PF-treated DCs diminished TH17 differentiation (4.26% in vitro and 1.64% in vivo) and decreased IL-17 expression (P < 0.05) while inducing CD4+CD25+Foxp3+ Treg differentiation (7.82% in vitro and 6.85% in vivo) and increasing Foxp3 and IL-10 production (P < 0.05). Additionally, both PF and PF-treated DCs improved colonic histopathology in the mouse model of colitis (P < 0.05). In conclusion this study suggested that PF can ameliorate TNBS-induced colitis by modulating the DC-mediated TH17/Treg balance.
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15
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Manipulating resident microbiota to enhance regulatory immune function to treat inflammatory bowel diseases. J Gastroenterol 2020; 55:4-14. [PMID: 31482438 PMCID: PMC6942586 DOI: 10.1007/s00535-019-01618-1] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Accepted: 08/20/2019] [Indexed: 02/04/2023]
Abstract
Altered intestinal microbial composition (dysbiosis) and metabolic products activate aggressive mucosal immune responses that mediate inflammatory bowel diseases (IBD). This dysbiosis impairs the function of regulatory immune cells, which normally promote mucosal homeostasis. Normalizing and maintaining regulatory immune cell function by correcting dysbiosis provides a promising approach to treat IBD patients. However, existing microbe-targeted therapies, including antibiotics, prebiotics, probiotics, and fecal microbial transplantation, provide variable outcomes that are not optimal for current clinical application. This review discusses recent progress in understanding the dysbiosis of IBD and the basis for therapeutic restoration of homeostatic immune function by manipulating an individual patient's microbiota composition and function. We believe that identifying more precise therapeutic targets and developing appropriate rapid diagnostic tools will guide more effective and safer microbe-based induction and maintenance treatments for IBD patients that can be applied in a personalized manner.
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16
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GLM, a novel luteolin derivative, attenuates inflammatory responses in dendritic cells: Therapeutic potential against ulcerative colitis. Biochem Biophys Res Commun 2019; 518:87-93. [PMID: 31402120 DOI: 10.1016/j.bbrc.2019.08.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Accepted: 08/05/2019] [Indexed: 12/13/2022]
Abstract
GLM, a luteolin derivative, shows anti-melanogenic effect via regulation of various signal molecules; however, it is unclear whether it also exerts anti-inflammatory effect. This study investigated the mechanisms of the anti-inflammatory effect of GLM on activated dendritic cells (DCs) to elucidate its therapeutic potential for ulcerative colitis. The anti-inflammatory effect of GLM was firstly investigated based on its effect on DCs maturation and T cells proliferation/activation. GLM treatment downregulated pro-inflammatory cytokine productions, surface molecule expression, and antigen-presenting ability for MHC-II complex in LPS-activated DCs. Importantly, anti-inflammatory effect induced by GLM treatment were independent of MAPK/NF-κB signaling pathways. Furthermore, DCs that were co-treated with LPS and GLM impaired the proliferation and activation of naïve CD4+ T cells. Interestingly, GLM exerted in vivo protective effect in DSS-induced colitis models by decreasing Th1, Th2, and Th17 cells and myeloperoxidase (MPO) levels, as well as restoring body weight, disease activity, and DSS-induced pathology. Based on these results, GLM was shown to be a potential candidate treatment for ulcerative colitis.
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17
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Tahaghoghi-Hajghorbani S, Ajami A, Ghorbanalipoor S, Hosseini-Khah Z, Taghiloo S, Khaje-Enayati P, Hosseini V. Protective effect of TSLP and IL-33 cytokines in ulcerative colitis. AUTOIMMUNITY HIGHLIGHTS 2019; 10:1. [PMID: 30868311 PMCID: PMC6416230 DOI: 10.1186/s13317-019-0110-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/12/2018] [Accepted: 01/25/2019] [Indexed: 01/29/2023]
Abstract
PURPOSE Inflammatory bowel disease (IBD) primarily includes ulcerative colitis (UC) and Crohn's disease (CD). Thymic stromal lymphopoietin (TSLP) is a cytokine produced by intestinal epithelial cells (IECs) with immunomodulatory properties that plays an important role in the development of regulatory T cell (Treg) responses and tolerance in the gut. On the other hand, IL-33 has been considered as a cytokine with two different properties, inflammatory and anti-inflammatory functions, the latter may play a protective role against chronic intestinal inflammation. In the present study, we investigated the relative gene expression levels of TSLP and IL-33 molecules in ulcerative colitis. METHODS Patients with clinical symptoms of colitis undergoing a routine diagnostic colonoscopy were included in this study. Biopsy specimens were collected and divided into two parts. One part was fixed and processed for routine histopathological examinations and the other part was stored for RNA extraction. TSLP and IL-33 gene expression were determined using the SYBR Green qRT-PCR. RESULTS The expression level of TSLP and IL-33 were significantly lower in UC patients compared with the control group. Moreover, the expressions of these cytokines were more down-regulated in severe UC patients compared with mild and moderate ones and the control group. We also showed a positive correlation between low expression of TSLP and IL-33 and the severity of UC disease. CONCLUSIONS In this study, we showed decreased mRNA expression levels of TSLP and IL-33 in UC patients and also a negative correlation between expression of TSLP and IL-33 and severity of UC disease.
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Affiliation(s)
- Sahar Tahaghoghi-Hajghorbani
- Molecular and Cell Biology Research Center, Mazandaran University of Medical Sciences, Sari, Iran.,Department of Immunology, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Abolghasem Ajami
- Molecular and Cell Biology Research Center, Mazandaran University of Medical Sciences, Sari, Iran.,Department of Immunology, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | | | - Zahra Hosseini-Khah
- Molecular and Cell Biology Research Center, Mazandaran University of Medical Sciences, Sari, Iran.,Department of Molecular Medicine, School of Advanced Technologies in Medicine, Tehran University of Medical Science, Tehran, Iran
| | - Saeid Taghiloo
- Department of Immunology, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Peyman Khaje-Enayati
- Molecular and Cell Biology Research Center, Mazandaran University of Medical Sciences, Sari, Iran
| | - Vahid Hosseini
- Gut and Liver Research Center, Imam Khomeini Hospital, Mazandaran University of Medical Sciences, Sari, Iran.
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18
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L4 stage Heligmosomoides polygyrus prevents the maturation of dendritic JAWS II cells. Exp Parasitol 2019; 196:12-21. [DOI: 10.1016/j.exppara.2018.10.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 09/24/2018] [Accepted: 10/30/2018] [Indexed: 12/29/2022]
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19
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Dendritic cell profiles in the inflamed colonic mucosa predict the responses to tumor necrosis factor alpha inhibitors in inflammatory bowel disease. Radiol Oncol 2018; 52:443-452. [PMID: 30511938 PMCID: PMC6287181 DOI: 10.2478/raon-2018-0045] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Accepted: 10/25/2018] [Indexed: 12/18/2022] Open
Abstract
Background Dendritic cells play crucial roles in the control of inflammation and immune tolerance in the gut. We aimed to investigate the effects of tumor necrosis factor alpha (TNFa) inhibitors on intestinal dendritic cells in patients with inflammatory bowel disease and the potential role of intestinal dendritic cells in predicting the response to treatment. Patients and methods Intestinal biopsies were obtained from 30 patients with inflammatory bowel disease before and after treatment with TNFa inhibitors. The proportions of lamina propria dendritic cell phenotypes were analysed using flow cytometry. Disease activity was endoscopically assessed at baseline and after the induction treatment. Results At baseline, the proportion of conventional dendritic cells was higher in the inflamed mucosa (7.8%) compared to the uninflamed mucosa (4.5%) (p = 0.003), and the proportion of CD103+ dendritic cells was lower in the inflamed mucosa (47.1%) versus the uninflamed mucosa (57.3%) (p = 0.03). After 12 weeks of treatment, the proportion of conventional dendritic cells in the inflamed mucosa decreased from 7.8% to 4.5% (p = 0.014), whereas the proportion of CD103+ dendritic cells remained unchanged. Eighteen out of 30 (60%) patients responded to their treatment by week 12. Responders had a significantly higher proportion of conventional dendritic cells (9.16% vs 4.4%, p < 0.01) with higher expression of HLA-DR (median fluorescent intensity [MFI] 12152 vs 8837, p = 0.038) in the inflamed mucosa before treatment compared to nonresponders. Conclusions A proportion of conventional dendritic cells above 7% in the inflamed inflammatory bowel disease mucosa before treatment predicts an endoscopic response to TNFa inhibitors.
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20
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Gut Microbiota and Mucosal Immunity in the Neonate. Med Sci (Basel) 2018; 6:medsci6030056. [PMID: 30018263 PMCID: PMC6163169 DOI: 10.3390/medsci6030056] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Revised: 07/04/2018] [Accepted: 07/12/2018] [Indexed: 12/17/2022] Open
Abstract
Gut microbiota colonization is a complex, dynamic, and step-wise process that is in constant development during the first years of life. This microbial settlement occurs in parallel with the maturation of the immune system, and alterations during this period, due to environmental and host factors, are considered to be potential determinants of health-outcomes later in life. Given that host–microbe interactions are mediated by the immune system response, it is important to understand the close relationship between immunity and the microbiota during birth, lactation, and early infancy. This work summarizes the evidence to date on early gut microbiota colonization, and how it influences the maturation of the infant immune system and health during the first 1000 days of life. This review will also address the influence of perinatal antibiotic intake and the importance of delivery mode and breastfeeding for an appropriate development of gut immunity.
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21
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Paiatto LN, Silva FGD, Yamada ÁT, Tamashiro WMSC, Simioni PU. Adoptive transfer of dendritic cells expressing CD11c reduces the immunological response associated with experimental colitis in BALB/c mice. PLoS One 2018; 13:e0196994. [PMID: 29738575 PMCID: PMC5940207 DOI: 10.1371/journal.pone.0196994] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2017] [Accepted: 04/24/2018] [Indexed: 01/14/2023] Open
Abstract
INTRODUCTION In addition to conventional therapies, several new strategies have been proposed for modulating autoimmune diseases, including the adoptive transfer of immunological cells. In this context, dendritic cells (DCs) appear to be one of the most promising treatments for autoimmune disorders. The present study aimed to evaluate the effects of adoptive transfer of DCs obtained from both naïve and ovalbumin (OVA)-tolerant mice on the severity of TNBS induced colitis and analyze the eventual protective mechanisms. METHODS AND RESULTS To induce oral tolerance, BALB/c mice were fed 4mg/mL OVA solution for seven consecutive days. Spleen DCs were isolated from tolerant (tDC) and naïve (nDC) mice, and then adoptively transferred to syngeneic mice. Three days later, colitis was induced in DC treated mice by intrarectal instillation of 100μg2,4,6-trinitrobenzenesulfonic acid (TNBS) dissolved in 50% ethanol. Control subjects received only intrarectal instillation of either TNBS solution or a vehicle. Five days later, mice from all groups were euthanized and examined for physiological and immunological parameters. Regarding the phenotype, we observed that the frequencies of CD11+ MHC II+ and CD11+ MHCII+ CD86+ cells were significantly lower in DCs isolated from tolerant mice than in those from naive mice. However, pretreatment with both types of DCs was able to significantly reduce clinical signs of colitis such as diarrhea, rectal prolapse, bleeding, and cachexia, although only treatment with tDCs was able to prevent weight loss from instillation of TNBS. In vitro proliferation of spleen cells from mice treated with either type of DCs was significantly lower than that observed in splenic cell cultures of naïve mice. Although no significant difference was observed in the frequencies of Treg cells in the experimental groups, the frequency of Th17+CD4+cellsand the secretion of IL-17 were more reduced in the cultures of spleen cells from mice treated with either type of DCs. The levels of IL-9 and IFN-γ were lower in supernatants of cells from mice treated with nDCs. CONCLUSION The results allow us to conclude that the adoptive transfer of cells expressing CD11c is able to reduce the clinical and immunological signs of drug-induced colitis. Adoptive transfer of CD11c+DC isolated from both naive and tolerant mice altered the proliferative and T cell responses. To the best of our knowledge, there is no previously published data showing the protective effects of DCs from naïve or tolerant mice in the treatment of colitis.
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Affiliation(s)
- Lisiery N. Paiatto
- Institute of Biosciences, Universidade Estadual Paulista, UNESP, Rio Claro, SP, Brazil
| | - Fernanda G. D. Silva
- Faculty of Food Engineering, University of Campinas, UNICAMP, Campinas, São Paulo, Brazil
- Department of Food, School of Nutrition, Federal University of Ouro Preto, Ouro Preto, Minas Gerais, Brazil
| | - Áureo T. Yamada
- Department of Biochemistry and Tissue Biology, Institute of Biology, University of Campinas, UNICAMP, Campinas, São Paulo, Brazil
| | - Wirla M. S. C. Tamashiro
- Department of Genetics, Evolution, Microbiology and Immunology, Institute of Biology, University of Campinas, UNICAMP, Campinas, São Paulo, Brazil
| | - Patricia U. Simioni
- Institute of Biosciences, Universidade Estadual Paulista, UNESP, Rio Claro, SP, Brazil
- Department of Genetics, Evolution, Microbiology and Immunology, Institute of Biology, University of Campinas, UNICAMP, Campinas, São Paulo, Brazil
- Department of Biomedical Science, Faculty of Americana, FAM, Americana, São Paulo, Brazil
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22
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Rehal S, Stephens M, Roizes S, Liao S, von der Weid PY. Acute small intestinal inflammation results in persistent lymphatic alterations. Am J Physiol Gastrointest Liver Physiol 2018; 314:G408-G417. [PMID: 29351397 DOI: 10.1152/ajpgi.00340.2017] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Inflammatory bowel disease (IBD) has a complex pathophysiology with limited treatments. Structural and functional changes in the intestinal lymphatic system have been associated with the disease, with increased risk of IBD occurrence linked to a history of acute intestinal injury. To examine the potential role of the lymphatic system in inflammation recurrence, we evaluated morphological and functional changes in mouse mucosal and mesenteric lymphatic vessels, and within the mesenteric lymph nodes during acute ileitis caused by a 7-day treatment with dextran sodium sulfate (DSS). We monitored whether the changes persisted during a 14-day recovery period and determined their potential consequences on dendritic cell (DC) trafficking between the mucosa and lymphoid tissues. DSS administration was associated with marked lymphatic abnormalities and dysfunctions exemplified by lymphangiectasia and lymphangiogenesis in the ileal mucosa and mesentery, increased mesenteric lymphatic vessel leakage, and lymphadenopathy. Lymphangiogenesis and lymphadenopathy were still evident after recovery from intestinal inflammation and correlated with higher numbers of DCs in mucosal and lymphatic tissues. Specifically, a deficit in CD103+ DCs observed during acute DSS in the lamina propria was reversed and further enhanced during recovery. We concluded that an acute intestinal insult caused alterations of the mesenteric lymphatic system, including lymphangiogenesis, which persisted after resolution of inflammation. These morphological and functional changes could compromise DC function and movement, increasing susceptibility to further gastrointestinal disease. Elucidation of the changes in mesenteric and intestinal lymphatic function should offer key insights for new therapeutic strategies in gastrointestinal disorders such as IBD. NEW & NOTEWORTHY Lymphatic integrity plays a critical role in small intestinal homeostasis. Acute intestinal insult in a mouse model of acute ileitis causes morphological and functional changes in mesenteric and intestinal lymphatic vessels. While some of the changes significantly regressed during inflammation resolution, others persisted, including lymphangiogenesis and altered dendritic cell function and movement, potentially increasing susceptibility to the recurrence of gastrointestinal inflammation.
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Affiliation(s)
- Sonia Rehal
- Inflammation Research Network and Smooth Muscle Research Group, Snyder Institute for Chronic Diseases, Department of Physiology and Pharmacology, Cumming School of Medicine, University of Calgary , Calgary, Alberta , Canada
| | - Matthew Stephens
- Inflammation Research Network and Smooth Muscle Research Group, Snyder Institute for Chronic Diseases, Department of Physiology and Pharmacology, Cumming School of Medicine, University of Calgary , Calgary, Alberta , Canada
| | - Simon Roizes
- Inflammation Research Network and Smooth Muscle Research Group, Snyder Institute for Chronic Diseases, Department of Physiology and Pharmacology, Cumming School of Medicine, University of Calgary , Calgary, Alberta , Canada
| | - Shan Liao
- Inflammation Research Network and Smooth Muscle Research Group, Snyder Institute for Chronic Diseases, Department of Physiology and Pharmacology, Cumming School of Medicine, University of Calgary , Calgary, Alberta , Canada
| | - Pierre-Yves von der Weid
- Inflammation Research Network and Smooth Muscle Research Group, Snyder Institute for Chronic Diseases, Department of Physiology and Pharmacology, Cumming School of Medicine, University of Calgary , Calgary, Alberta , Canada
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23
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Jeong JJ, Lee HJ, Jang SE, Han MJ, Kim DH. Lactobacillus plantarum C29 alleviates NF-κB activation and Th17/Treg imbalance in mice with TNBS-induced colitis. FOOD AGR IMMUNOL 2018. [DOI: 10.1080/09540105.2017.1418841] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Affiliation(s)
- Jin-Ju Jeong
- Department of Life and Nanopharmaceutical Sciences, College of Pharmacy, Kyung Hee University, Seoul, Korea
| | - Hae-Ji Lee
- Department of Life and Nanopharmaceutical Sciences, College of Pharmacy, Kyung Hee University, Seoul, Korea
| | - Se-Eun Jang
- Department of Life and Nanopharmaceutical Sciences, College of Pharmacy, Kyung Hee University, Seoul, Korea
- Department of Food and Nutrition, Kyung Hee University, Seoul, Korea
| | - Myung Joo Han
- Department of Food and Nutrition, Kyung Hee University, Seoul, Korea
| | - Dong-Hyun Kim
- Department of Life and Nanopharmaceutical Sciences, College of Pharmacy, Kyung Hee University, Seoul, Korea
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24
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Chen L, Zhou Z, Yang Y, Chen N, Xiang H. Therapeutic effect of imiquimod on dextran sulfate sodium-induced ulcerative colitis in mice. PLoS One 2017; 12:e0186138. [PMID: 29049372 PMCID: PMC5648150 DOI: 10.1371/journal.pone.0186138] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2017] [Accepted: 09/26/2017] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Imiquimod is a Toll-like receptor-7 agonist that regulates immunity and can be used as an immune adjuvant. Ulcerative colitis has a close correlation with immune disorder. AIM To investigate the therapeutic effect of imiquimod on dextran sulfate sodium (DSS)-induced colitis and explore the underlying mechanisms. METHODS C57BL/6J C57 mice received 3% DSS for 7 days to induce ulcerative colitis. Groups of mice were intraperitoneally injected with dexamethasone (DXM, 1.5 mg/kg) or imiquimod (IMQ, 30 mg/kg) at the same time daily. During the experimental period, clinical signs, body weight, stool consistency and visible fecal blood were monitored and recorded daily; colitis was evaluated by disease activity index (DAI) score and by histological score. At the conclusion of the experiment, the level of colonic myeloperoxidase (MPO) activity and the serum levels of the cytokines tumor necrosis factor-α (TNF-α), interleukin 6 (IL-6) and interleukin 10 (IL-10) were measured. RESULTS Administration of 3% DSS for 7 days successfully induced acute colitis associated with diarrhea, bloody mucopurulent stool, body weight decreases, and other changes. Colitis severity was significantly ameliorated in the IMQ treatment groups, as determined by hematoxylin-eosin (HE) staining and histopathological scores. Moreover, IMQ significantly reduced the activity of MPO in colonic tissue and the serum levels of inflammatory cytokines, increased colon length and spleen weight, and effectively inhibited microscopic damage to the colon tissue. CONCLUSION IMQ had beneficial effects on DSS-induced ulcerative colitis, supporting its further development and clinical application in ulcerative colitis.
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Affiliation(s)
- Lu Chen
- Department of Gastroenterology, Hubei Key Laboratory of Digestive System Disease, RenMin Hospital of Wuhan University, Wuhan, China
| | - Zhongyin Zhou
- Department of Gastroenterology, Hubei Key Laboratory of Digestive System Disease, RenMin Hospital of Wuhan University, Wuhan, China
- * E-mail:
| | - Yan Yang
- Department of Gastroenterology, Hubei Key Laboratory of Digestive System Disease, RenMin Hospital of Wuhan University, Wuhan, China
| | - Na Chen
- Department of Gastroenterology, Hubei Key Laboratory of Digestive System Disease, RenMin Hospital of Wuhan University, Wuhan, China
| | - Hongyu Xiang
- Department of Gastroenterology, Hubei Key Laboratory of Digestive System Disease, RenMin Hospital of Wuhan University, Wuhan, China
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The Intricate Link among Gut "Immunological Niche," Microbiota, and Xenobiotics in Intestinal Pathology. Mediators Inflamm 2017; 2017:8390595. [PMID: 29118468 PMCID: PMC5651127 DOI: 10.1155/2017/8390595] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Revised: 07/06/2017] [Accepted: 07/12/2017] [Indexed: 12/17/2022] Open
Abstract
Inflammatory bowel diseases (IBDs) are diseases characterized by various degrees of inflammation involving the gastrointestinal tract. Ulcerative colitis and Crohn's disease are characterized by a dysregulated immune response leading to structural gut alterations in genetically predisposed individuals. Diverticular disease is characterized by abnormal immune response to normal gut microbiota. IBDs are linked to a lack of physiological tolerance of the mucosal immune system to resident gut microbiota and pathogens. The disruption of immune tolerance involves inflammatory pathways characterized by an unbalance between the anti-inflammatory regulatory T cells and the proinflammatory Th1/Th17 cells. The interaction among T cell subpopulations and their related cytokines, mediators of inflammation, gut microbiota, and the intestinal mucosa constitute the gut “immunological niche.” Several evidences have shown that xenobiotics, such as rifaximin, can positively modulate the inflammatory pathways at the site of gut immunological niche, acting as anti-inflammatory agents. Xenobiotics may interfere with components of the immunological niche, leading to activation of anti-inflammatory pathways and inhibition of several mediators of inflammation. In summary, xenobiotics may reduce disease-related gut mucosal alterations and clinical symptoms. Studying the complex interplay between gut immunological niche and xenobiotics will certainly open new horizons in the knowledge and therapy of intestinal pathologies.
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Zhao HM, Han F, Xu R, Huang XY, Cheng SM, Huang MF, Yue HY, Wang X, Zou Y, Xu HL, Liu DY. Therapeutic effect of curcumin on experimental colitis mediated by inhibiting CD8 +CD11c + cells. World J Gastroenterol 2017; 23:1804-1815. [PMID: 28348486 PMCID: PMC5352921 DOI: 10.3748/wjg.v23.i10.1804] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2016] [Revised: 12/25/2016] [Accepted: 01/17/2017] [Indexed: 02/06/2023] Open
Abstract
AIM To verify whether curcumin (Cur) can treat inflammatory bowel disease by regulating CD8+CD11c+ cells.
METHODS We evaluated the suppressive effect of Cur on CD8+CD11c+ cells in spleen and Peyer’s patches (PPs) in colitis induced by trinitrobenzene sulfonic acid. Mice with colitis were treated by 200 mg/kg Cur for 7 d. On day 8, the therapeutic effect of Cur was evaluated by visual assessment and histological examination, while co-stimulatory molecules of CD8+CD11c+ cells in the spleen and PPs were measured by flow cytometry. The levels of interleukin (IL)-10, interferon (IFN)-γ and transforming growth factor (TGF)-β1 in spleen and colonic mucosa were determined by ELISA.
RESULTS The disease activity index, colon weight, weight index of colon and histological score of experimental colitis were obviously decreased after Cur treatment, while the body weight and colon length recovered. After treatment with Cur, CD8+CD11c+ cells were decreased in the spleen and PPs, and the expression of major histocompatibility complex II, CD205, CD40, CD40L and intercellular adhesion molecule-1 was inhibited. IL-10, IFN-γ and TGF-β1 levels were increased compared with those in mice with untreated colitis.
CONCLUSION Cur can effectively treat experimental colitis, which is realized by inhibiting CD8+CD11c+ cells.
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Oral immune therapy: targeting the systemic immune system via the gut immune system for the treatment of inflammatory bowel disease. Clin Transl Immunology 2016; 5:e60. [PMID: 26900473 PMCID: PMC4735066 DOI: 10.1038/cti.2015.47] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2015] [Revised: 11/04/2015] [Accepted: 12/22/2015] [Indexed: 12/13/2022] Open
Abstract
Inflammatory bowel diseases (IBD) are associated with an altered systemic immune response leading to inflammation-mediated damage to the gut and other organs. Oral immune therapy is a method of systemic immune modulation via alteration of the gut immune system. It uses the inherit ability of the innate system of the gut to redirect the systemic innate and adaptive immune responses. Oral immune therapy is an attractive clinical approach to treat autoimmune and inflammatory disorders. It can induce immune modulation without immune suppression, has minimal toxicity and is easily administered. Targeting the systemic immune system via the gut immune system can serve as an attractive novel therapeutic method for IBD. This review summarizes the current data and discusses several examples of oral immune therapeutic methods for using the gut immune system to generate signals to reset systemic immunity as a treatment for IBD.
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Rodgers G, Doucette CD, Soutar DA, Liwski RS, Hoskin DW. Piperine impairs the migration and T cell-activating function of dendritic cells. Toxicol Lett 2015; 242:23-33. [PMID: 26640239 DOI: 10.1016/j.toxlet.2015.11.025] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Revised: 11/23/2015] [Accepted: 11/25/2015] [Indexed: 11/30/2022]
Abstract
Piperine, a major alkaloid found in the fruits of black and long pepper plants, has anti-inflammatory properties; however, piperine's effect on dendritic cell (DC) migration and T cell-activating function has not been investigated. Bone marrow-derived mouse DCs that were matured in the presence of 100 μM piperine showed reduced in vitro migration in response to CCL21, as well as reduced in vivo migration to lymph nodes. In addition, piperine-treated DCs had reduced CCR7 expression and elevated CCR5 expression, as well as reduced expression of CD40 and class II major histocompatibility complex molecules and decreased nuclear accumulation of RelB. DC production of interleukin (IL)-6, tumor necrosis factor α, and monocyte chemoattractant protein-1 in response to lipopolysaccharide stimulation was also reduced following piperine treatment. Exposure to piperine during maturation therefore caused DCs to retain an immature phenotype, which was associated with a reduced capacity to promote T cell activation since co-culture of ovalbumin (OVA323-339)-specific T cells with OVA323-339-pulsed DCs that were previously matured in the presence of piperine showed reduced interferon-γ and IL-2 expression. OVA323-339-specific T cell proliferation was also reduced in vivo in the presence of piperine-treated DCs. Inhibition of DC migration and function by piperine may therefore be a useful strategy to down-regulate potentially harmful DC-driven T cell responses to self-antigens and transplantation antigens.
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Affiliation(s)
- Gemma Rodgers
- Department of Pathology, Faculty of Medicine, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada
| | - Carolyn D Doucette
- Department of Pathology, Faculty of Medicine, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada
| | - David A Soutar
- Department of Pathology, Faculty of Medicine, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada
| | - Robert S Liwski
- Department of Pathology, Faculty of Medicine, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada; Department of Microbiology and Immunology, Faculty of Medicine, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada
| | - David W Hoskin
- Department of Pathology, Faculty of Medicine, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada; Department of Microbiology and Immunology, Faculty of Medicine, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada; Department of Surgery, Faculty of Medicine, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada.
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Gutiérrez RL, Riddle MS, Porter CK. Increased risk of functional gastrointestinal sequelae after Clostridium difficile infection among active duty United States military personnel (1998-2010). Gastroenterology 2015; 149:1408-14. [PMID: 26255560 DOI: 10.1053/j.gastro.2015.07.059] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2014] [Revised: 07/21/2015] [Accepted: 07/28/2015] [Indexed: 02/08/2023]
Abstract
BACKGROUND & AIMS Some acute enteric infections are associated with the development of functional gastrointestinal disorders, most commonly irritable bowel syndrome but also other functional and organic gastrointestinal sequelae. Clostridium difficile infection has increased in incidence and severity, however, few studies have evaluated functional disorders after this infection. METHODS We evaluated the epidemiology and sequelae of C difficile in the US military population by using the US Department of Defense's Armed Forces Health Surveillance Center Defense Medical Ecounter Database. We then performed a retrospective cohort study of 891 active-duty US military personnel who developed C difficile from 1998 to 2010 and 3231 matched subjects who had not been exposed to C difficile. Subjects were identified based on International Classification of Diseases, 9th revision, Clinical Modification codes for C difficile disease. RESULTS C difficile was associated independently with increased rate ratios (RRs) for incident irritable bowel syndrome (RR, 6.1; 95% confidence interval [CI], 2.9-12.9), gastroesophageal reflux disease (GERD) (RR, 1.9; 95% CI, 1.4-2.6), dyspepsia (RR, 3.3; 95%, 1.4-7.7), and constipation (RR, 2.2; 95% CI, 1.3-3.7). Approximately 14.1% of subjects with C difficile later were identified with one of these functional gastrointestinal disorders (FGDs), compared with 6% of controls. Community- and health care-associated C difficile were associated at similar rates with these sequelae. Patients were at increased risk for FGDs within 3 months of a C difficile episode, with one additional case of FGD developing for every 12 diagnoses of C difficile. CONCLUSIONS The incidence of community- and health care-associated C difficile has increased in the US military population from 1998 through 2010. As for other gastrointestinal infections, C difficile disease is associated with clinically relevant functional sequelae in this military population.
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Affiliation(s)
- Ramiro L Gutiérrez
- Enteric Diseases Department, Naval Medical Research Center, Silver Spring, Maryland.
| | - Mark S Riddle
- Enteric Diseases Department, Naval Medical Research Center, Silver Spring, Maryland
| | - Chad K Porter
- Enteric Diseases Department, Naval Medical Research Center, Silver Spring, Maryland
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Haag LM, Siegmund B. Intestinal Microbiota and the Innate Immune System - A Crosstalk in Crohn's Disease Pathogenesis. Front Immunol 2015; 6:489. [PMID: 26441993 PMCID: PMC4585200 DOI: 10.3389/fimmu.2015.00489] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Accepted: 09/07/2015] [Indexed: 12/11/2022] Open
Abstract
Crohn's disease (CD) is a chronic, relapsing inflammatory disorder that can occur anywhere along the gastrointestinal tract. The precise etiology of CD is still unclear but it is widely accepted that a complex series of interactions between susceptibility genes, the immune system and environmental factors are implicated in the onset and perpetuation of the disease. Increasing evidence from experimental and clinical studies implies the intestinal microbiota in disease pathogenesis, thereby supporting the hypothesis that chronic intestinal inflammation arises from an abnormal immune response against the microorganisms of the intestinal flora in genetically susceptible individuals. Given that CD patients display changes in their gut microbiota composition, collectively termed "dysbiosis," the question raises whether the altered microbiota composition is a cause of disease or rather a consequence of the inflammatory state of the intestinal environment. This review will focus on the crosstalk between the gut microbiota and the innate immune system during intestinal inflammation, thereby unraveling the role of the microbiota in CD pathogenesis.
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Affiliation(s)
- Lea-Maxie Haag
- Division of Gastroenterology, Infectious Diseases and Rheumatology, Medical Department 1, Charité - Universitätsmedizin Berlin , Berlin , Germany
| | - Britta Siegmund
- Division of Gastroenterology, Infectious Diseases and Rheumatology, Medical Department 1, Charité - Universitätsmedizin Berlin , Berlin , Germany
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Pike BL, Paden KA, Alcala AN, Jaep KM, Gormley RP, Maue AC, Christmann BS, Elson CO, Riddle MS, Porter CK. Immunological Biomarkers in Postinfectious Irritable Bowel Syndrome. J Travel Med 2015; 22:242-50. [PMID: 26058758 DOI: 10.1111/jtm.12218] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2014] [Revised: 02/18/2015] [Accepted: 03/16/2015] [Indexed: 12/11/2022]
Abstract
BACKGROUND There is a recognized need for biological markers to facilitate diagnoses of irritable bowel syndrome (IBS) and to distinguish it from other functional and organic disorders. As postinfectious IBS (PI-IBS) is believed to account for as many as one third of all IBS cases, here we sought to identify differences in specific cytokines and serologic responses across patients with idiopathic IBS and PI-IBS and healthy controls. METHODS At total of 120 US military personnel were identified from the Defense Medical Surveillance System-based International Classification of Diseases, 9th Revision, Clinical Modification (ICD9-CM) codes recorded during medical encounters and were grouped based on infectious gastroenteritis (IGE) episode (Shigella, Campylobacter, Salmonella, or an unspecified pathogen) followed by IBS, IBS without antecedent IGE, or IGE without subsequent IBS within 2 years of the IGE exposure. Sera from subjects were assayed for cytokine levels and antibodies against a panel of microbiome antigens. RESULTS In total, 10 of 118 markers considered were shown to differ between IBS patients and healthy controls, including cytokines interleukin-6 (IL-6), IL-8, IL-1β, and macrophage inflammatory protein-1β (MIP-1β), as well as antibody responses to microbial antigens. Antimicrobial antibody response profiles also differed between PI-IBS cases compared with IBS cases without an antecedent episode of acute IGE. Comparisons also suggest that immunoglobulin A (IgA) and IgG profiles may point to pathogen-specific origins among PI-IBS cases. CONCLUSION Taken together, these results provide further evidence as to the molecular distinctness of classes of IBS cases and that serum biomarkers may prove useful in elucidating their pathobiological pathways.
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Affiliation(s)
- Brian L Pike
- Enteric Diseases Department, Naval Medical Research Center, Silver Spring, MD, USA
| | - Katie Ann Paden
- Enteric Diseases Department, Naval Medical Research Center, Silver Spring, MD, USA
| | - Ashley N Alcala
- Enteric Diseases Department, Naval Medical Research Center, Silver Spring, MD, USA
| | - Kayla M Jaep
- Enteric Diseases Department, Naval Medical Research Center, Silver Spring, MD, USA
| | - Robert P Gormley
- Enteric Diseases Department, Naval Medical Research Center, Silver Spring, MD, USA
| | - Alexander C Maue
- Enteric Diseases Department, Naval Medical Research Center, Silver Spring, MD, USA
| | | | - Charles O Elson
- Department of Medicine and Microbiology, University of Alabama, Birmingham, AL, USA
| | - Mark S Riddle
- Enteric Diseases Department, Naval Medical Research Center, Silver Spring, MD, USA
| | - Chad K Porter
- Enteric Diseases Department, Naval Medical Research Center, Silver Spring, MD, USA
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Liu X, Shi Y, Hou X, Wan C, He S, Chong X, Liu M, Li H, Liu F. Microarray analysis of intestinal immune-related gene expression in heat-stressed rats. Int J Hyperthermia 2015; 30:324-7. [PMID: 25144822 DOI: 10.3109/02656736.2014.939722] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
PURPOSE This study aimed to investigate immune-related gene expression in rat small intestine after heat stress. MATERIALS AND METHODS Twelve Sprague Dawley (SD) rats were randomly divided into control and heat-stressed groups. Rats in both groups were housed at 25 °C with 60% relative humidity. The heat-stressed group was subjected to 40 °C for 2 h/day for 3 days. After heat stress, the mRNA expression profile of small intestine epithelial tissue was evaluated by microarray analysis. RESULTS A total of 23 genes related to immune responses were significantly altered, of which 12 genes were up-regulated and 11 genes were down-regulated. CONCLUSIONS Microarray analysis demonstrated the JAK-STAT pathway had a potentially important role in the regulation of inflammation in the small intestine, and changes in antigen presentation might reduce intestinal immune responses after heat stress.
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Affiliation(s)
- Xiaoxi Liu
- China Agricultural University-Beijing University of Agriculture Traditional Chinese Veterinary Medicine (CAU-BUA TCVM) Teaching and Research Team, College of Animal Science and Technology, Beijing University of Agriculture , Beijing
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Alpaerts K, Buckinx R, Adriaensen D, Van Nassauw L, Timmermans JP. Identification and Putative Roles of Distinct Subtypes of Intestinal Dendritic Cells in Neuroimmune Communication: What can be Learned from Other Organ Systems? Anat Rec (Hoboken) 2015; 298:903-16. [DOI: 10.1002/ar.23106] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Revised: 09/13/2014] [Accepted: 11/08/2014] [Indexed: 12/13/2022]
Affiliation(s)
- Katrien Alpaerts
- Laboratory of Cell biology and Histology; Department of Veterinary Sciences; University of Antwerp; Antwerp Belgium
| | - Roeland Buckinx
- Laboratory of Cell biology and Histology; Department of Veterinary Sciences; University of Antwerp; Antwerp Belgium
| | - Dirk Adriaensen
- Laboratory of Cell biology and Histology; Department of Veterinary Sciences; University of Antwerp; Antwerp Belgium
| | - Luc Van Nassauw
- Laboratory of Human Anatomy and Embryology; Faculty of Medicine and Health Sciences; University of Antwerp; Antwerp Belgium
| | - Jean-Pierre Timmermans
- Laboratory of Cell biology and Histology; Department of Veterinary Sciences; University of Antwerp; Antwerp Belgium
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Zeng JQ, Xu CD, Zhou T, Wu J, Lin K, Liu W, Wang XQ. Enterocyte dendritic cell-specific intercellular adhesion molecule-3-grabbing non-integrin expression in inflammatory bowel disease. World J Gastroenterol 2015; 21:187-195. [PMID: 25574091 PMCID: PMC4284334 DOI: 10.3748/wjg.v21.i1.187] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Revised: 07/10/2014] [Accepted: 07/25/2014] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate dendritic cell-specific intercellular adhesion molecule-3-grabbing non-integrin (DC-SIGN) expression in intestinal epithelial cells (IECs) in inflammatory bowel disease (IBD).
METHODS: The expression of DC-SIGN in IECs was examined by immunohistochemistry of intestinal mucosal biopsies from 32 patients with IBD and 10 controls. Disease activity indices and histopathology scores were used to assess the tissue lesions and pathologic damage. Animal studies utilized BALB/c mice with dextran sodium sulfate (DSS)-induced colitis treated with anti-P-selectin lectin-EGF domain monoclonal antibody (PsL-EGFmAb). Controls, untreated and treated mice were sacrificed after 7 d, followed by isolation of colon tissue and IECs. Colonic expression of DC-SIGN, CD80, CD86 and MHC II was examined by immunohistochemistry or flow cytometry. The capacity of mouse enterocytes or dendritic cells to activate T cells was determined by co-culture with naïve CD4+ T cells. Culture supernatant and intracellular levels of interleukin (IL)-4 and interferon (IFN)-γ were measured by enzyme-linked immunosorbent assay and flow cytometry, respectively. The ability of IECs to promote T cell proliferation was detected by flow cytometry staining with carboxyfluorescein diacetate succinimidyl ester.
RESULTS: Compared with controls, DC-SIGN expression was significantly increased in IECs from patients with Crohn’s disease (P < 0.01) or ulcerative colitis (P < 0.05). DC-SIGN expression was strongly correlated with disease severity in IBD (r = 0.48; P < 0.05). Similarly, in the DSS-induced colitis mouse model, IECs showed upregulated expression of DC-SIGN, CD80, CD86 and MHC, and DC-SIGN expression was positively correlated with disease activity (r = 0.62: P < 0.01). IECs from mouse colitis stimulated naïve T cells to generate IL-4 (P < 0.05). Otherwise, dendritic cells promoted a T-helper-1-skewing phenotype by stimulating IFN-γ secretion. However, DC-SIGN expression and T cell differentiation were suppressed following treatment of mice with DSS-induced colitis with PsL-EGFmAb. The proliferation cycles of CD4+ T cells from mice with DSS-induced colitis appeared as five cycles, which was more than in the control and treated groups. These results suggest that IECs can promote T cell proliferation.
CONCLUSION: IECs regulate tissue-associated immune compartments under the control of DC-SIGN in IBD.
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MESH Headings
- Adolescent
- Animals
- CD4-Positive T-Lymphocytes/immunology
- CD4-Positive T-Lymphocytes/metabolism
- Case-Control Studies
- Cell Adhesion Molecules/immunology
- Cell Adhesion Molecules/metabolism
- Cell Differentiation
- Cell Proliferation
- Cells, Cultured
- Child
- Child, Preschool
- Coculture Techniques
- Colitis/chemically induced
- Colitis/immunology
- Colitis/metabolism
- Colitis/pathology
- Colitis, Ulcerative/immunology
- Colitis, Ulcerative/metabolism
- Colitis, Ulcerative/pathology
- Colon/immunology
- Colon/metabolism
- Colon/pathology
- Crohn Disease/immunology
- Crohn Disease/metabolism
- Crohn Disease/pathology
- Cytokines/immunology
- Cytokines/metabolism
- Dendritic Cells/immunology
- Dendritic Cells/metabolism
- Dextran Sulfate
- Disease Models, Animal
- Enterocytes/immunology
- Enterocytes/metabolism
- Enterocytes/pathology
- Female
- Humans
- Inflammation Mediators/immunology
- Inflammation Mediators/metabolism
- Lectins, C-Type/immunology
- Lectins, C-Type/metabolism
- Lymphocyte Activation
- Male
- Mice, Inbred BALB C
- Phenotype
- Receptors, Cell Surface/immunology
- Receptors, Cell Surface/metabolism
- Signal Transduction
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Wang W, Xu A, Zhou G, Leng M, Zhou H, Yan J. Proliferation and apoptosis of Peyer's patches and its lymphocytes in experimental terminal ileitis. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2014; 7:8583-8592. [PMID: 25674222 PMCID: PMC4313998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Accepted: 12/01/2014] [Indexed: 06/04/2023]
Abstract
This study will provide guide for the terminal ileitis in clinical diagnosis and treatment. The animals were been done terminal ileum-cecum side to side anastomosis, terminal ileum operation line and only anesthesia treatment, respectively. The model group presented acute inflammation after surgery for 2 weeks and the inflammation was limited to the mucosal layer. Animals presented chronic inflammation to 8 weeks, mucosal membrane was given priority to with lymphocytic infiltrates. In 2 weeks and 4 weeks, the number of Peyer's patches (PP knot) and PP knot lymphocytes increased significantly in the model group (P < 0.05, P < 0.01). At 8 weeks, the suture group and the model group presented a large number of lymphocytic apoptosis (P < 0.01). Rat ileal PP knot lymphocyte small molecule DNA showed typical "trapezoid" bands. We observed apparent morphology of apoptosis and crescent-shaped nucleus. Continuous immune response in terminal ileitis plays a considerable role in the process of the disease.
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Affiliation(s)
- Wei Wang
- Department of Gastroenterology, Affiliated Xiangnan Hospital of Hunan Normal University 169 Hospital of PLA, Hengyang, P.R. China
| | - Ailei Xu
- Department of Gastroenterology, Affiliated Xiangnan Hospital of Hunan Normal University 169 Hospital of PLA, Hengyang, P.R. China
| | - Guohua Zhou
- Department of Gastroenterology, Affiliated Xiangnan Hospital of Hunan Normal University 169 Hospital of PLA, Hengyang, P.R. China
| | - Mingfang Leng
- Department of Gastroenterology, Affiliated Xiangnan Hospital of Hunan Normal University 169 Hospital of PLA, Hengyang, P.R. China
| | - Hongyu Zhou
- Department of Gastroenterology, Affiliated Xiangnan Hospital of Hunan Normal University 169 Hospital of PLA, Hengyang, P.R. China
| | - Jun Yan
- Department of Gastroenterology, Affiliated Xiangnan Hospital of Hunan Normal University 169 Hospital of PLA, Hengyang, P.R. China
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Ho TH, Cohen BL, Colombel JF, Mehandru S. Review article: the intersection of mucosal pathophysiology in HIV and inflammatory bowel disease, and its implications for therapy. Aliment Pharmacol Ther 2014; 40:1171-86. [PMID: 25267394 DOI: 10.1111/apt.12976] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Revised: 09/04/2014] [Accepted: 09/10/2014] [Indexed: 12/11/2022]
Abstract
BACKGROUND The immunopathology of inflammatory bowel diseases (IBD) and HIV in the gastrointestinal (GI) tract can be viewed as ends of a spectrum with IBD being associated with 'immune excess' and HIV with 'immune paucity' within the GI tract. AIM To review the pathophysiology of IBD and HIV as they intersect in the gut immune system. METHODS A search was conducted in PubMed using defined keywords 'IBD, inflammatory bowel disease, Crohn's disease, ulcerative colitis, HIV, innate immunity, mucosal layer, macrophage, cytokine, dendritic cells, adaptive immunity, CD4, T cells, Th1, Th2, natural killer T cells (NKT)'. RESULTS Both the mucosal innate defence and adaptive immunity are profoundly affected by IBD and HIV. The pathophysiology of IBD and HIV with regard to mucosal barrier, macrophages, dendritic cells, NK cells, NKT cells and T-cell subsets is distinct yet closely interwoven. There is limited information on the clinical manifestations of patients who have both IBD and HIV. However, recent studies suggest that the clinical course of IBD may be attenuated by concurrent HIV infection - a premise that is reasonably supported by what is known of their pathophysiology. CONCLUSIONS It is apparent that through specific pathophysiological mechanisms, HIV is capable of attenuating inflammation in IBD. In the absence of experimental models, further clinical studies are necessary to better understand patients with concurrent disease and decipher the clinical and mechanistic relationship between HIV and IBD at mucosal surfaces. Such studies are critical to guide therapeutic decisions in the management of patients with IBD infected with HIV.
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Affiliation(s)
- T H Ho
- Division of Gastroenterology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
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Sahu R, Bethunaickan R, Singh S, Davidson A. Structure and function of renal macrophages and dendritic cells from lupus-prone mice. Arthritis Rheumatol 2014; 66:1596-607. [PMID: 24866269 DOI: 10.1002/art.38410] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2013] [Accepted: 02/11/2014] [Indexed: 12/13/2022]
Abstract
OBJECTIVE To characterize renal macrophages and dendritic cells (DCs) in 2 murine models of lupus nephritis. METHODS We used a bead-based enrichment step followed by cell sorting to isolate populations of interest from young mice and nephritic mice. Cell morphology was examined by microscopy. Arginase and nitrite production was examined using biochemical assays. The antigen-presenting functions of the cells were determined using mixed lymphocyte reactions. Selected cytokine, chemokine, and Toll-like receptor (TLR) profiles were examined using real-time quantitative polymerase chain reaction. RESULTS We identified 2 populations of macrophages and 3 populations of DCs in both of our murine models of lupus (NZB/NZW and [NZW × BXSB]F1 mice). F4/80(high) macrophages, which were resident in normal kidneys and found to be increased in number during nephritis, did not produce either arginase or nitrite upon cytokine stimulation and acquired a mixed proinflammatory and antiinflammatory functional phenotype during nephritis that resembles the constitutively activated phenotype of gut F4/80(high) macrophages. The various cell types differed in their expression of chemokine receptors and TLRs, consistent with variability in their renal location. Resident renal CD103+ DCs were the best antigen-presenting cells and could easily be distinguished from CD11c(high) myeloid DCs that accumulated in large numbers during nephritis. CONCLUSION Our study highlights the heterogeneity of the macrophage/DC infiltrate in chronic lupus nephritis and provides an initial phenotypic and functional analysis of the different cellular components that can now be used to define the role of each cell subset in nephritis progression or amelioration. Of note, the dominant macrophage population that accumulates during nephritis has an acquired phenotype that is neither M1 nor M2 and may reflect failure of resolution of inflammation.
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Affiliation(s)
- Ranjit Sahu
- Feinstein Institute for Medical Research, Manhasset, New York
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Hsu CC, Paik J, Treuting PM, Seamons A, Meeker SM, Brabb TL, Maggio-Price L. Infection with murine norovirus 4 does not alter Helicobacter-induced inflammatory bowel disease in Il10(-/-) mice. Comp Med 2014; 64:256-263. [PMID: 25296012 PMCID: PMC4170090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2013] [Revised: 01/03/2014] [Accepted: 02/10/2014] [Indexed: 06/03/2023]
Abstract
Infection of laboratory mice with murine noroviruses (MNV) is widely prevalent. MNV alters various mouse models of disease, including the Helicobacter bilis-induced mouse model of inflammatory bowel disease (IBD) in Mdr1a(--) mice. To further characterize the effect of MNV on IBD, we used mice deficient in the immunoregulatory cytokine IL10 (Il10(-/-) mice). In vitro infection of Il10(-/-) bone marrow-derived macrophages (BMDM) with MNV4 cocultured with H. bilis antigens increased the gene expression of the proinflammatory cytokines IL1β, IL6, and TNFα as compared with that of BMDM cultured with H. bilis antigens only. Therefore, to test the hypothesis that MNV4 infection increases inflammation and alters disease phenotype in H. bilis-infected Il10(-/-) mice, we compared the amount and extent of inflammation in Il10(-/-) mice coinfected with H. bilis and MNV4 with those of mice singly infected with H. bilis. IBD scores, incidence of IBD, or frequency of severe IBD did not differ between mice coinfected with H. bilis and MNV4 and those singly infected with H. bilis. Mice infected with MNV4 only had no appreciable IBD, comparable to uninfected mice. Our findings suggest that, unlike in Mdr1a(-/-) mice, the presence of MNV4 in Il10(-/-) mouse colonies is unlikely to affect the IBD phenotype in a Helicobacter-induced model. However, because MNV4 altered cytokine expression in vitro, our results highlight the importance of determining the potential influence of MNV on mouse models of inflammatory disease, given that MNV has a tropism for macrophages and dendritic cells and that infection is widely prevalent.
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Affiliation(s)
- Charlie C Hsu
- Department of Comparative Medicine, University of Washington, Seattle, Washington, USA.
| | - Jisun Paik
- Department of Comparative Medicine, University of Washington, Seattle, Washington, USA
| | - Piper M Treuting
- Department of Comparative Medicine, University of Washington, Seattle, Washington, USA
| | - Audrey Seamons
- Department of Comparative Medicine, University of Washington, Seattle, Washington, USA
| | - Stacey M Meeker
- Department of Comparative Medicine, University of Washington, Seattle, Washington, USA
| | - Thea L Brabb
- Department of Comparative Medicine, University of Washington, Seattle, Washington, USA
| | - Lillian Maggio-Price
- Department of Comparative Medicine, University of Washington, Seattle, Washington, USA
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Abstract
The human fetus lives in a germ-free intrauterine environment and enters the outside world containing microorganisms from several sources, resulting in gut colonization. Full-term, vaginally born infants are completely colonized with a diverse array of bacterial families in clusters (Phyla) and species (>1000) by the first year of life. Colonizing bacteria communicating with the gut epithelium and underlying lymphoid tissues ('bacterial-epithelial crosstalk') result in a functional immune phenotype and no expression of disease (immune homeostasis). Appropriate colonization is influenced by the prebiotic effect of breast milk oligosaccharides. Adequate colonization results in an innate and adaptive mucosal immune phenotype via communication between molecular patterns on colonizing bacteria and pattern-recognition receptors (e.g., toll-like receptors) on epithelial and lymphoid cells. This ontogeny affects the immune system's capacity to develop oral tolerance to innocuous bacteria and benign antigens. Inadequate intestinal colonization with premature delivery, delivery by Cesarean section and excessive use of perinatal antibiotics results in the absence of adequate bacterial-epithelial crosstalk and an increased incidence of immune-mediated diseases [e.g., asthma, allergy in general and necrotizing enterocolitis (NEC)]. Fortunately, infants with inadequate intestinal colonization can be restored to a bacterial balance with the intake of probiotics. This has been shown to prevent debilitating diseases such as NEC. Thus, understanding the role of gut microbiota in programming of the immune phenotype may be important in preventing disease expression in later childhood and adulthood.
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Vagal nerve stimulation modulates the dendritic cell profile in posthemorrhagic shock mesenteric lymph. J Trauma Acute Care Surg 2014; 76:610-7; discussion 617-8. [PMID: 24553526 DOI: 10.1097/ta.0000000000000137] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
BACKGROUND Previous studies have established that posthemorrhagic shock mesenteric lymph (PHSML) contains proinflammatory mediators, while the cellular basis of PHSML is less well characterized in acute models of injury. CD103 dendritic cells (DCs) have been identified in the mesenteric lymph (ML) in models of chronic intestinal inflammation, suggesting an important role in the gut response to injury. We have previously demonstrated the ability of vagal nerve stimulation (VNS) to prevent gut barrier failure after trauma/hemorrhagic shock (T/HS); however, the ability of VNS to alter ML DCs is unknown. We hypothesized that the CD103 MHC-II DC population would change in PHSML and that VNS would prevent injury-induced changes in this population in PHSML. METHODS Male Sprague-Dawley rats were randomly assigned to trauma/sham shock or T/HS. T/HS was induced by midline laparotomy and 60 minutes of HS (blood pressure, 35 mm Hg), followed by fluid resuscitation. A separate cohort of animals underwent cervical VNS after the HS phase. Gut tissue was harvested at 2 hours after injury for histologic analysis. ML was collected during the pre-HS, HS, and post-HS phase. For flow cytometric analysis, ML cells were subjected to staining with CD103 and MHC-II antibodies, and this cell population was compared in the pre-HS and post-HS phase from the same animal. The CD4Foxp3 cell (T reg) population in the ML node (MLN) was also tested to determine effects of CD103 DC modulation in the ML. RESULTS VNS reduced histologic gut injury and ML flow seen after injury. The CD103 MHC-II DC population in the PHSML was significantly decreased compared with pre-HS and was associated with decreased T reg expression in the MLN. VNS prevented the injury-induced decrease in the CD103 MHC-II+ DC population in the ML and restored the T reg population in the MLN. CONCLUSION These findings suggest that VNS mediates the inflammatory responses in ML DCs and MLN T reg cells by affecting the set point of T/HS responsiveness.
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Ji GX, Cheng Y, Gao FL, Xie CS, Yang M. Immune modulation by the IL-33/ST2 system in ulcerative colitis. Shijie Huaren Xiaohua Zazhi 2014; 22:1663-1668. [DOI: 10.11569/wcjd.v22.i12.1663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The immune system prevents pathogens from entering and spreading in the body. Dysfunction of the immune system can activate an intestinal inflammatory response, leading to chronic diseases including inflammatory bowel diseases (IBD). Ulcerative colitis (UC) is a form of IBD of unknown etiology with increasing prevalence. There is an imbalance in the interleukin-33/homolog of sulfotransferase 2 (IL-33/ST2) axis in UC intestinal mucosa. This paper reviews the role of the IL-33/ST2 system in immunity of the intestinal mucosa and its importance in IBD, especially UC.
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Ding Y, Liang Y, Deng B, Qiao A, Wu K, Xiao W, Gong W. Induction of TGF-β and IL-10 production in dendritic cells using astilbin to inhibit dextran sulfate sodium-induced colitis. Biochem Biophys Res Commun 2014; 446:529-34. [PMID: 24613838 DOI: 10.1016/j.bbrc.2014.02.136] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2014] [Accepted: 02/28/2014] [Indexed: 02/05/2023]
Abstract
Astilbin, a major bioactive compound from Rhizoma smilacis glabrae, has been reported to possess anti-inflammatory properties. Our study first evaluated astilbin on dextran sulfate sodium (DSS)-induced acute colitis in mice. By intraperitoneal injection of astilbin, the severity of colitis was attenuated, and the serum levels of IL-10 and TGF-β were increased. Using flow cytometry, a higher number of IL-10(+) dendritic cells (DCs) and TGF-β(+) DCs and a lower number of CD86(+) DCs, IL-12 p40(+) DCs, and IL-1β(+) DCs were detected in the spleen of mice with colitis after astilbin treatment. The administration of astilbin also resulted in the upregulation of CD103(+) expression in colonic DCs. In a coculture system, murine bone marrow-derived DCs pretreated with astilbin resulted in an enhanced production of CD4(+)CD25(+)Foxp3(+) T cells. The results of this study show that astilbin could be a candidate drug for inflammatory bowel disease by mediating the regulatory functions of DCs.
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Affiliation(s)
- Yanbing Ding
- Department of Gastroenterology, The Second Clinical College of Yangzhou University, 45 Taizhou Road, Yangzhou, Jiangsu 225001, China.
| | - Yu Liang
- Department of Gastroenterology, The Second Clinical College of Yangzhou University, 45 Taizhou Road, Yangzhou, Jiangsu 225001, China
| | - Bin Deng
- Department of Gastroenterology, The Second Clinical College of Yangzhou University, 45 Taizhou Road, Yangzhou, Jiangsu 225001, China
| | - Ahui Qiao
- Department of Gastroenterology, The Second Clinical College of Yangzhou University, 45 Taizhou Road, Yangzhou, Jiangsu 225001, China
| | - Keyan Wu
- Department of Gastroenterology, The Second Clinical College of Yangzhou University, 45 Taizhou Road, Yangzhou, Jiangsu 225001, China
| | - Weiming Xiao
- Department of Gastroenterology, The Second Clinical College of Yangzhou University, 45 Taizhou Road, Yangzhou, Jiangsu 225001, China
| | - Weijuan Gong
- Department of Immunology, School of Medicine, Yangzhou University, 11 Huaihai Road, Yangzhou, Jiangsu 225001, China
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Heylen M, Ruyssers NE, Gielis EM, Vanhomwegen E, Pelckmans PA, Moreels TG, De Man JG, De Winter BY. Of worms, mice and man: an overview of experimental and clinical helminth-based therapy for inflammatory bowel disease. Pharmacol Ther 2014; 143:153-67. [PMID: 24603369 DOI: 10.1016/j.pharmthera.2014.02.011] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Accepted: 02/25/2014] [Indexed: 12/17/2022]
Abstract
The incidence of inflammatory and autoimmune disorders is highest in well-developed countries which is directly related to their higher hygienic standards: it is suggested that the lack of exposure to helminths contributes to the susceptibility for immune-related diseases. Epidemiological, experimental and clinical data support the idea that helminths provide protection against immune-mediated diseases such as inflammatory bowel disease (IBD). The most likely mechanism for the suppression of immune responses by helminths is the release of helminth-derived immunomodulatory molecules. This article reviews the experimental and clinical studies investigating the therapeutic potential of helminth-based therapy in IBD and also focuses on the current knowledge of its immunomodulatory mechanisms of action highlighting innate as well as adaptive immune mechanisms. Identifying the mechanisms by which these helminths and helminth-derived molecules modulate the immune system will help in creating novel drugs for the treatment of IBD and other disorders that result from an overactive immune response.
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Affiliation(s)
- Marthe Heylen
- Laboratory of Experimental Medicine and Pediatrics, Division of Gastroenterology, University of Antwerp, Antwerp, Belgium
| | - Nathalie E Ruyssers
- Laboratory of Experimental Medicine and Pediatrics, Division of Gastroenterology, University of Antwerp, Antwerp, Belgium
| | - Els M Gielis
- Laboratory of Experimental Medicine and Pediatrics, Division of Gastroenterology, University of Antwerp, Antwerp, Belgium
| | - Els Vanhomwegen
- Laboratory of Experimental Medicine and Pediatrics, Division of Gastroenterology, University of Antwerp, Antwerp, Belgium
| | - Paul A Pelckmans
- Laboratory of Experimental Medicine and Pediatrics, Division of Gastroenterology, University of Antwerp, Antwerp, Belgium; Antwerp University Hospital, Division of Gastroenterology & Hepatology, Antwerp, Belgium
| | - Tom G Moreels
- Laboratory of Experimental Medicine and Pediatrics, Division of Gastroenterology, University of Antwerp, Antwerp, Belgium; Antwerp University Hospital, Division of Gastroenterology & Hepatology, Antwerp, Belgium
| | - Joris G De Man
- Laboratory of Experimental Medicine and Pediatrics, Division of Gastroenterology, University of Antwerp, Antwerp, Belgium
| | - Benedicte Y De Winter
- Laboratory of Experimental Medicine and Pediatrics, Division of Gastroenterology, University of Antwerp, Antwerp, Belgium.
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Li H, Liu L, Tao Y, Zhao P, Wang F, Huai L, Zhi D, Liu J, Li G, Dang C, Xu Y. Effects of polysaccharides from Pholiota nameko on maturation of murine bone marrow-derived dendritic cells. Int J Biol Macromol 2014; 63:188-97. [DOI: 10.1016/j.ijbiomac.2013.11.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2013] [Revised: 10/24/2013] [Accepted: 11/02/2013] [Indexed: 11/30/2022]
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Van Brussel I, Lee WP, Rombouts M, Nuyts AH, Heylen M, De Winter BY, Cools N, Schrijvers DM. Tolerogenic dendritic cell vaccines to treat autoimmune diseases: Can the unattainable dream turn into reality? Autoimmun Rev 2014; 13:138-50. [DOI: 10.1016/j.autrev.2013.09.008] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Accepted: 09/27/2013] [Indexed: 01/10/2023]
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Therapeutic potential of tolerogenic dendritic cells in IBD: from animal models to clinical application. Clin Dev Immunol 2013; 2013:789814. [PMID: 24319468 PMCID: PMC3844279 DOI: 10.1155/2013/789814] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Accepted: 09/27/2013] [Indexed: 12/16/2022]
Abstract
The gut mucosa undergoes continuous antigenic exposure from food antigens, commensal flora derived ligands, and pathogens. This constant stimulation results in controlled inflammatory responses that are effectively suppressed by multiple factors. This tight regulation, necessary to maintain intestinal homeostasis, is affected during inflammatory bowel diseases (IBD) resulting in altered immune responses to harmless microorganisms. Dendritic cells (DCs) are sentinels of immunity, located in peripheral and lymphoid tissues, which are essential for homeostasis of T cell-dependent immune responses. The expression of a particular set of pathogen recognition receptors allows DCs to initiate immune responses. However, in the absence of danger signals, different DC subsets can induce active tolerance by inducing regulatory T cells (Treg), inhibiting inflammatory T helper cell responses, or both. Interestingly, several protocols to generate clinical grade tolerogenic DC (tol-DCs) in vitro have been described, opening the possibility to restore the intestinal homeostasis to bacterial flora by cellular therapy. In this review, we discuss different DC subsets and their role in IBD. Additionally, we will review preclinical studies performed in animal models while describing recent characterization of tol-DCs from Crohn's disease patients for clinical application.
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Impact of probiotics on toll-like receptor 4 expression in an experimental model of ulcerative colitis. ACTA ACUST UNITED AC 2013; 33:661-665. [PMID: 24142717 DOI: 10.1007/s11596-013-1177-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2013] [Revised: 09/15/2013] [Indexed: 12/23/2022]
Abstract
Toll-like receptors (TLRs) are key components of the innate immune system which trigger antimicrobial host defense responses. This study aimed to investigate the impact of probiotics (Lactobacillus, Bifidobacterium) on the expression of TLR4 and tumor necrosis factor-alpha (TNF-α) in the colon mucosa of rat experimental ulcerative colitis model induced by trinitrobenzene sulfonic acid (TNBS)/ethanol and immune complexes. The gross and histological changes of the colonic mucosa were observed and assessed by the means-standard deviation and independent samples t-test. The protein expression levels of TLR4 and TNF-α were detected by using immunohistochemistry and Western blotting, respectively. It was revealed that there was visible infiltration of inflammatory cells, formation of crypt abscess, and the reduction of goblet cells in the colon tissue of experimental models. As compared with the control group, the levels of TLR4 and TNF-α protein were significantly increased in the model group (P<0.01 for both). No significant difference was found in the expression of TLR4 and TNF-α between the two-week probiotics treatment group and the model group (P>0.05), whereas significant reductions were shown in rats which were treated with probiotics for four weeks as compared with the model group (P<0.01). There was no significant difference between two probiotics-treated groups. Our results implied that probiotics were likely to play a key role in protecting ulcerative colitis by reducing the inflammatory factor TNF-α expression through inhibiting the TLR4 expression in the colon tissue of experimental models.
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Deising A, Gutierrez RL, Porter CK, Riddle MS. Postinfectious functional gastrointestinal disorders: a focus on epidemiology and research agendas. Gastroenterol Hepatol (N Y) 2013; 9:145-157. [PMID: 23961264 PMCID: PMC3745203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Epidemiologic research is fundamental and complementary to our understanding of disease and development of primary, secondary, and tertiary interventions. To put the current evidence into context and identify gaps and research priorities in the areas of disease attribution, burden of disease, clinical characterization, and management of postinfectious functional gastrointestinal disorders (PI-FGDs), we took a multidisciplinary approach from the domains of infectious disease, gastroenterology, epidemiology, and public health. Our review of data from these disciplines found that, despite a complete understanding of pathoetiology, studies continue to accumulate and point toward evidence of a causal association for FGD. For some FGDs, Bradford Hill's criteria for causality yield more certainty than other criteria. In addition, the growing recognition of the impact of acute foodborne illness on economics and society is leading to exploration of the potential long-term health effects and disease burden of PI-FGDs, although a paucity of data exist in terms of pathogen-specific risk, disability duration, and relevant disability weights. Lastly, the understanding of PI-FGDs is changing the way research is approached and suggests a need for a more expansive exploration of biologic mechanisms and how FGDs are categorized. Areas of research priorities are catalogued in this paper and will hopefully provide inspiration for future studies and contributions to the field of gastroenterology.
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Affiliation(s)
- Adam Deising
- Dr. Deising is a Fellow in the Department of Gastroenterology at Walter Reed National Military Medical Center in Bethesda, Maryland. Dr. Gutierrez (Infectious Diseases), Dr. Porter (Epidemiology), and Dr. Riddle (Public Health) are Staff Scientists in the Enteric Diseases Department of Naval Medical Research Center in Silver Spring, Maryland
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Kim ME, Kim HK, Kim DH, Yoon JH, Lee JS. 18β-Glycyrrhetinic acid fromlicorice rootimpairs dendritic cells maturation and Th1 immune responses. Immunopharmacol Immunotoxicol 2013; 35:329-35. [DOI: 10.3109/08923973.2013.768636] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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