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Wei W, Mu S, Han Y, Chen Y, Kuang Z, Wu X, Luo Y, Tong C, Zhang Y, Yang Y, Song Z. Gpr174 Knockout Alleviates DSS-Induced Colitis via Regulating the Immune Function of Dendritic Cells. Front Immunol 2022; 13:841254. [PMID: 35669778 PMCID: PMC9164256 DOI: 10.3389/fimmu.2022.841254] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 04/25/2022] [Indexed: 11/30/2022] Open
Abstract
Background Dysfunction of the immune system would disturb the intestinal homeostasis and lead to inflammatory bowel disease (IBD). Dendritic cells (DCs) help maintain intestinal homeostasis and immediately respond to pathogens or injuries once the mucosa barriers are destroyed during IBD. G protein-coupled receptors(GPR)174 is an essential regulator of immunity that is widely expressed in most immune cells, including DCs. However, the role of GPR174 in regulating the immune function of DC in colitis has not been investigated. Methods Dextran sodium sulfate (DSS) was administered to establish the mice colitis model. Data of weight, length of colon, disease activity index (DAI), and macroscopic scores were collected. The flow cytometry was used to detect the infiltrations of T cells and DCs, the mean fluorescence intensity (MFI) of CD80, CD86, CD40, and major histocompatibility complex-II (MHC-II). And T cells proliferataion was measured by carboxyfluorescein diacetate succinimidyl ester (CFSE). The expression of cytokines (tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), interleukin-10 (IL-10), interferon-γ (IFN-γ), interleukin -4 (IL-4)) and GPR174 mRNA were measured by Elisa, quantitative polymerase chain reaction (qPCR), and immunofluorescence. RNA of bone-marrow-derived dendritic cells (BMDCs) was extracted for sequencing. Adoptive transfer of BMDCs was administrated intravenously. Results Gpr174-/- mice exposed to 3% DSS showed significant alleviation characterized by reduced loss of weight, more minor colon damage, and better DAI and macroscopic scores. The expression of pro-inflammatory cytokines (TNF-α, IL-6) decreased, while anti-inflammatory cytokine (IL-10) increased compared with WT mice. In vitro, Gpr174-/- BMDCs showed less maturity, with a declined expression of MHC-II, CD80, CD86 and reduced TNF-α, higher IL-10 after LPS stimulation. Gpr174-/- BMDCs were less capable of activating OT-II naïve CD4+ T cells than WT BMDCs and induced more Th0 cells to differentiate into Treg while less into Th1. Furthermore, the transcriptome sequencing analysis exhibited that Gpr174 participated in TNF-α (NF-κB) signaling, leukocyte transendothelial migration, and Th1/Th2 cell differentiation pathways. Adoptive transfer of Gpr174-/- BMDCs to WT mice ameliorated DSS-induced colitis. Conclusion Our study indicated that GPR174 was involved in the pathogenesis of IBD by regulating the maturation of the dendritic cells to maintain immune homeostasis. TNF-α (NF-κB) signaling pathway, leukocyte transendothelial migration, and Th1/Th2 cell differentiation pathways may be the target pathway.
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Affiliation(s)
- Wei Wei
- Department of Emergency Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Sucheng Mu
- Department of Emergency Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yi Han
- Department of Emergency Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yao Chen
- Department of Emergency Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Zhongshu Kuang
- Department of Emergency Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Xingyue Wu
- Department of Emergency Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yue Luo
- Department of Emergency Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Chaoyang Tong
- Department of Emergency Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yiqun Zhang
- Endoscopy Center and Endoscopy Research Institute, Zhongshan Hospital, Fudan University, Shanghai, China
- *Correspondence: Zhenju Song, ; Yilin Yang, ; Yiqun Zhang,
| | - Yilin Yang
- Department of Emergency Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
- *Correspondence: Zhenju Song, ; Yilin Yang, ; Yiqun Zhang,
| | - Zhenju Song
- Department of Emergency Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
- Shanghai Key Laboratory of Lung Inflammation and Injury, Shanghai, China
- Shanghai Institute of Infectious Disease and Biosecurity, School of Public Health, Fudan University, Shanghai, China
- *Correspondence: Zhenju Song, ; Yilin Yang, ; Yiqun Zhang,
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2
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Elfiky AMI, Ghiboub M, Li Yim AYF, Hageman IL, Verhoeff J, de Krijger M, van Hamersveld PHP, Welting O, Admiraal I, Rahman S, Garcia-Vallejo JJ, Wildenberg ME, Tomlinson L, Gregory R, Rioja I, Prinjha RK, Furze RC, Lewis HD, Mander PK, Heinsbroek SEM, Bell MJ, de Jonge WJ. Carboxylesterase-1 Assisted Targeting of HDAC Inhibitors to Mononuclear Myeloid Cells in Inflammatory Bowel Disease. J Crohns Colitis 2022; 16:668-681. [PMID: 34633041 PMCID: PMC9089418 DOI: 10.1093/ecco-jcc/jjab176] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND AND AIMS Histone deacetylase inhibitors [HDACi] exert potent anti-inflammatory effects. Because of the ubiquitous expression of HDACs, clinical utility of HDACi is limited by off-target effects. Esterase-sensitive motif [ESM] technology aims to deliver ESM-conjugated compounds to human mononuclear myeloid cells, based on their expression of carboxylesterase 1 [CES1]. This study aims to investigate utility of an ESM-tagged HDACi in inflammatory bowel disease [IBD]. METHODS CES1 expression was assessed in human blood, in vitro differentiated macrophage and dendritic cells, and Crohn's disease [CD] colon mucosa, by mass cytometry, quantitative polymerase chain reaction [PCR], and immunofluorescence staining, respectively. ESM-HDAC528 intracellular retention was evaluated by mass spectrometry. Clinical efficacy of ESM-HDAC528 was tested in dextran sulphate sodium [DSS]-induced colitis and T cell transfer colitis models using transgenic mice expressing human CES1 under the CD68 promoter. RESULTS CES1 mRNA was highly expressed in human blood CD14+ monocytes, in vitro differentiated and lipopolysaccharide [LPS]-stimulated macrophages, and dendritic cells. Specific hydrolysis and intracellular retention of ESM-HDAC528 in CES1+ cells was demonstrated. ESM-HDAC528 inhibited LPS-stimulated IL-6 and TNF-α production 1000 times more potently than its control, HDAC800, in CES1high monocytes. In healthy donor peripheral blood, CES1 expression was significantly higher in CD14++CD16- monocytes compared with CD14+CD16++ monocytes. In CD-inflamed colon, a higher number of mucosal CD68+ macrophages expressed CES1 compared with non-inflamed mucosa. In vivo, ESM-HDAC528 reduced monocyte differentiation in the colon and significantly improved colitis in a T cell transfer model, while having limited potential in ameliorating DSS-induced colitis. CONCLUSIONS We demonstrate that monocytes and inflammatory macrophages specifically express CES1, and can be preferentially targeted by ESM-HDAC528 to achieve therapeutic benefit in IBD.
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Affiliation(s)
- Ahmed M I Elfiky
- Tytgat Institute for Liver and Intestinal Research, Amsterdam Gastroenterology & Metabolism, Amsterdam University Medical Centers, Amsterdam, The Netherlands
- Immunology Research Unit, GSK Medicines Research Centre, Stevenage, UK
| | - Mohammed Ghiboub
- Tytgat Institute for Liver and Intestinal Research, Amsterdam Gastroenterology & Metabolism, Amsterdam University Medical Centers, Amsterdam, The Netherlands
- Immunology Research Unit, GSK Medicines Research Centre, Stevenage, UK
| | - Andrew Y F Li Yim
- Tytgat Institute for Liver and Intestinal Research, Amsterdam Gastroenterology & Metabolism, Amsterdam University Medical Centers, Amsterdam, The Netherlands
- Immunology Research Unit, GSK Medicines Research Centre, Stevenage, UK
- Department of Clinical Genetics, Amsterdam Reproduction & Development, Amsterdam University Medical Centers, Amsterdam, The Netherlands
| | - Ishtu L Hageman
- Tytgat Institute for Liver and Intestinal Research, Amsterdam Gastroenterology & Metabolism, Amsterdam University Medical Centers, Amsterdam, The Netherlands
| | - Jan Verhoeff
- Department of Molecular Cell Biology & Immunology, Amsterdam Infection & Immunity Institute and Cancer Center Amsterdam, Amsterdam University Medical Centers, Amsterdam, The Netherlands
| | - Manon de Krijger
- Tytgat Institute for Liver and Intestinal Research, Amsterdam Gastroenterology & Metabolism, Amsterdam University Medical Centers, Amsterdam, The Netherlands
| | - Patricia H P van Hamersveld
- Tytgat Institute for Liver and Intestinal Research, Amsterdam Gastroenterology & Metabolism, Amsterdam University Medical Centers, Amsterdam, The Netherlands
| | - Olaf Welting
- Tytgat Institute for Liver and Intestinal Research, Amsterdam Gastroenterology & Metabolism, Amsterdam University Medical Centers, Amsterdam, The Netherlands
| | - Iris Admiraal
- Tytgat Institute for Liver and Intestinal Research, Amsterdam Gastroenterology & Metabolism, Amsterdam University Medical Centers, Amsterdam, The Netherlands
| | - Shafaque Rahman
- Tytgat Institute for Liver and Intestinal Research, Amsterdam Gastroenterology & Metabolism, Amsterdam University Medical Centers, Amsterdam, The Netherlands
| | - Juan J Garcia-Vallejo
- Department of Molecular Cell Biology & Immunology, Amsterdam Infection & Immunity Institute and Cancer Center Amsterdam, Amsterdam University Medical Centers, Amsterdam, The Netherlands
| | - Manon E Wildenberg
- Tytgat Institute for Liver and Intestinal Research, Amsterdam Gastroenterology & Metabolism, Amsterdam University Medical Centers, Amsterdam, The Netherlands
| | - Laura Tomlinson
- Discovery DMPK, IVIVT, GSK Medicines Research Centre, Stevenage, UK
| | - Richard Gregory
- Discovery DMPK, IVIVT, GSK Medicines Research Centre, Stevenage, UK
| | - Inmaculada Rioja
- Immunology Research Unit, GSK Medicines Research Centre, Stevenage, UK
| | - Rab K Prinjha
- Immunology Research Unit, GSK Medicines Research Centre, Stevenage, UK
| | - Rebecca C Furze
- Immunology Research Unit, GSK Medicines Research Centre, Stevenage, UK
| | - Huw D Lewis
- Immunology Research Unit, GSK Medicines Research Centre, Stevenage, UK
| | | | - Sigrid E M Heinsbroek
- Tytgat Institute for Liver and Intestinal Research, Amsterdam Gastroenterology & Metabolism, Amsterdam University Medical Centers, Amsterdam, The Netherlands
| | - Matthew J Bell
- Immunology Research Unit, GSK Medicines Research Centre, Stevenage, UK
| | - Wouter J de Jonge
- Tytgat Institute for Liver and Intestinal Research, Amsterdam Gastroenterology & Metabolism, Amsterdam University Medical Centers, Amsterdam, The Netherlands
- Department of Surgery, University of Bonn, Bonn, Germany
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3
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Kuttke M, Hromadová D, Yildirim C, Brunner JS, Vogel A, Paar H, Peters S, Weber M, Hofmann M, Kerndl M, Kieler M, Datler H, Musiejovsky L, Salzmann M, Lang M, Soukup K, Halfmann A, Sharif O, Schabbauer G. PI3K Signaling in Dendritic Cells Aggravates DSS-Induced Colitis. Front Immunol 2022; 13:695576. [PMID: 35514976 PMCID: PMC9063450 DOI: 10.3389/fimmu.2022.695576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Accepted: 03/15/2022] [Indexed: 11/13/2022] Open
Abstract
Aberrant innate immune responses to the gut microbiota are causally involved in the pathogenesis of inflammatory bowel diseases (IBD). The exact triggers and main signaling pathways activating innate immune cells and how they modulate adaptive immunity in IBD is still not completely understood. Here, we report that the PI3K/PTEN signaling pathway in dendritic cells enhances IL-6 production in a model of DSS-induced colitis. This results in exacerbated Th1 cell responses and increased mortality in DC-specific PTEN knockout (PTENΔDC) animals. Depletion of the gut microbiota using antibiotics as well as blocking IL-6R signaling rescued mortality in PTENΔDC mice, whereas adoptive transfer of Flt3L-derived PTEN-/- DCs into WT recipients exacerbated DSS-induced colitis and increased mortality. Taken together, we show that the PI3K signaling pathway in dendritic cells contributes to disease pathology by promoting IL-6 mediated Th1 responses.
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Affiliation(s)
- Mario Kuttke
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Dominika Hromadová
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Ceren Yildirim
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Julia S. Brunner
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Andrea Vogel
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Hannah Paar
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Sophie Peters
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Maria Weber
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Melanie Hofmann
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Martina Kerndl
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Markus Kieler
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Hannes Datler
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Laszlo Musiejovsky
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Manuel Salzmann
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Michaela Lang
- Department of Gastroenterology and Hepatology, Internal Medicine III, Medical University of Vienna, Vienna, Austria
| | - Klara Soukup
- St. Anna Children’s Cancer Research Institute, Vienna, Austria
| | - Angela Halfmann
- St. Anna Children’s Cancer Research Institute, Vienna, Austria
| | - Omar Sharif
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Gernot Schabbauer
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
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4
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The scaffold-dependent function of RIPK1 in dendritic cells promotes injury-induced colitis. Mucosal Immunol 2022; 15:84-95. [PMID: 34462571 PMCID: PMC8732271 DOI: 10.1038/s41385-021-00446-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 07/14/2021] [Accepted: 07/31/2021] [Indexed: 02/04/2023]
Abstract
Receptor interacting protein kinase 1 (RIPK1) is a cytosolic multidomain protein that controls cell life and death. While RIPK1 promotes cell death through its kinase activity, it also functions as a scaffold protein to promote cell survival by inhibiting FADD-caspase 8-dependent apoptosis and RIPK3-MLKL-dependent necroptosis. This pro-survival function is highlighted by excess cell death and perinatal lethality in Ripk1-/- mice. Recently, loss of function mutation of RIPK1 was found in patients with immunodeficiency and inflammatory bowel diseases. Hematopoietic stem cell transplantation restored not only immunodeficiency but also intestinal inflammatory pathology, indicating that RIPK1 in hematopoietic cells is critical to maintain intestinal immune homeostasis. Here, we generated dendritic cell (DC)-specific Ripk1-/- mice in a genetic background with loss of RIPK1 kinase activity and found that the mice developed spontaneous colonic inflammation characterized by increased neutrophil and Ly6C+ monocytes. In addition, these mice were highly resistant to injury-induced colitis. The increased colonic inflammation and the resistance to colitis were restored by dual inactivation of RIPK3 and FADD, but not by inhibition of RIPK3, MLKL, or ZBP1 alone. Altogether, these results reveal a scaffold activity-dependent role of RIPK1 in DC-mediated maintenance of colonic immune homeostasis.
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5
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Eckol protects against acute experimental colitis in mice: Possible involvement of Reg3g. J Funct Foods 2020. [DOI: 10.1016/j.jff.2020.104088] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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6
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Jofra T, Galvani G, Cosorich I, De Giorgi L, Annoni A, Vecchione A, Sorini C, Falcone M, Fousteri G. Experimental colitis in IL-10-deficient mice ameliorates in the absence of PTPN22. Clin Exp Immunol 2019; 197:263-275. [PMID: 31194881 DOI: 10.1111/cei.13339] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/30/2019] [Indexed: 02/06/2023] Open
Abstract
Interleukin (IL)-10 plays a key role in controlling intestinal inflammation. IL-10-deficient mice and patients with mutations in IL-10 or its receptor, IL-10R, show increased susceptibility to inflammatory bowel diseases (IBD). Protein tyrosine phosphatase, non-receptor type 22 (PTPN22) controls immune cell activation and the equilibrium between regulatory and effector T cells, playing an important role in controlling immune homoeostasis of the gut. Here, we examined the role of PTPN22 in intestinal inflammation of IL-10-deficient (IL-10-/- ) mice. We crossed IL-10-/- mice with PTPN22-/- mice to generate PTPN22-/- IL-10-/- double knock-out mice and induced colitis with dextran sodium sulphate (DSS). In line with previous reports, DSS-induced acute and chronic colitis was exacerbated in IL-10-/- mice compared to wild-type (WT) controls. However, PTPN22-/- IL-10-/- double knock-out mice developed milder disease compared to IL-10-/- mice. IL-17-promoting innate cytokines and T helper type 17 (Th17) cells were markedly increased in PTPN22-/- IL-10-/- mice, but did not provide a protctive function. CXCL1/KC was also increased in PTPN22-/- IL-10-/- mice, but therapeutic injection of CXCL1/KC in IL-10-/- mice did not ameliorate colitis. These results show that PTPN22 promotes intestinal inflammation in IL-10-deficient mice, suggesting that therapeutic targeting of PTPN22 might be beneficial in patients with IBD and mutations in IL-10 and IL-10R.
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Affiliation(s)
- T Jofra
- Division of Immunology Transplantation and Infectious Diseases (DITID), Diabetes Research Institute (DRI), IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - G Galvani
- Division of Immunology Transplantation and Infectious Diseases (DITID), Diabetes Research Institute (DRI), IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - I Cosorich
- Division of Immunology Transplantation and Infectious Diseases (DITID), Diabetes Research Institute (DRI), IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - L De Giorgi
- Division of Immunology Transplantation and Infectious Diseases (DITID), Diabetes Research Institute (DRI), IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - A Annoni
- San Raffaele Telethon Institute for Gene Therapy, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - A Vecchione
- Division of Immunology Transplantation and Infectious Diseases (DITID), Diabetes Research Institute (DRI), IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - C Sorini
- Division of Immunology Transplantation and Infectious Diseases (DITID), Diabetes Research Institute (DRI), IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - M Falcone
- Division of Immunology Transplantation and Infectious Diseases (DITID), Diabetes Research Institute (DRI), IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - G Fousteri
- Division of Immunology Transplantation and Infectious Diseases (DITID), Diabetes Research Institute (DRI), IRCCS San Raffaele Scientific Institute, Milan, Italy
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Zhao Q, Yu X, Li M, Liu Y, Han Y, Zhang X, Li XM, Wu X, Qin J, Fang J, Zhang H. MLKL attenuates colon inflammation and colitis-tumorigenesis via suppression of inflammatory responses. Cancer Lett 2019; 459:100-111. [PMID: 31158430 DOI: 10.1016/j.canlet.2019.05.034] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 05/23/2019] [Accepted: 05/24/2019] [Indexed: 10/26/2022]
Abstract
The mixed lineage kinase domain-like protein (MLKL) has emerged as a critical mediator of necroptosis, which results in the release of cellular damage-associated molecular patterns (DAMPs). However, its physiological role in regulating inflammation is not fully understood. We herein showed that Mlkl-/- mice were highly susceptible to colitis and colitis-associated tumorigenesis (CAT), which was associated with massive leukocyte infiltration and increased inflammatory responses. Moreover, we used bone marrow transplantation to reveal that MLKL in inflammatory cells is crucial for its role on colitis. Intestinal mucosal tissue and polyps isolated from Mlkl-/- mice exhibited increased ERK activation and elevated expression of genes associated with inflammation and cancer. Mechanistically, enhanced inflammation in Mlkl-/- mice was due to MEK/ERK activation particularly in dendritic cells (DCs). Our results demonstrate the role of MLKL in maintaining intestinal homeostasis and protecting against colitis and tumorigenesis.
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Affiliation(s)
- Qun Zhao
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, 200031, China; Laboratory of Inflammation and Molecular Pharmacology, School of Basic Medical Sciences & & Biomedical Research Institute, Hubei University of Medicine, Shiyan, 442000, China
| | - XianJun Yu
- Laboratory of Inflammation and Molecular Pharmacology, School of Basic Medical Sciences & & Biomedical Research Institute, Hubei University of Medicine, Shiyan, 442000, China
| | - Ming Li
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, 200031, China
| | - YongBo Liu
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, 200031, China
| | - YaMei Han
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, 200031, China
| | - XiXi Zhang
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, 200031, China
| | - Xiao Ming Li
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, 200031, China
| | - XiaoXia Wu
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, 200031, China
| | - Jun Qin
- CAS Key Laboratory of Tissue Microenvironment and Tumor, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Nutrition and Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, 200031, China
| | - Jing Fang
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, 200031, China
| | - Haibing Zhang
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, 200031, China.
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8
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He R, Li Y, Han C, Lin R, Qian W, Hou X. L-Fucose ameliorates DSS-induced acute colitis via inhibiting macrophage M1 polarization and inhibiting NLRP3 inflammasome and NF-kB activation. Int Immunopharmacol 2019; 73:379-388. [PMID: 31132733 DOI: 10.1016/j.intimp.2019.05.013] [Citation(s) in RCA: 88] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 05/08/2019] [Accepted: 05/08/2019] [Indexed: 12/12/2022]
Abstract
Previous studies reported that L-fucose had anti-inflammatory effects in respiratory and cutaneous system. However, the effect of L-fucose on colitis and the underlying mechanism is poorly understood. We studied the anti-inflammatory effects of L-fucose on Dextran sulfate sodium (DSS)-induced acute colitis in vivo and on LPS/ATP-induced bone marrow derived macrophages (BMDMs) damage in vitro. Our results show that L-fucose significantly alleviated weight loss and disease activity index (DAI) scores in colitis and reduced the infiltration of macrophages and neutrophils. In addition, L-fucose can inhibit macrophage M1 polarization, inactivate the NLRP3 inflammasome and reduce the release of TNFα, IL1β, IL6 pro-inflammatory cytokines. In vitro studies showed that L-fucose ameliorated cell damage resulting from the administration of LPS with ATP in BMDMs, inhibited NLRP3 inflammasome activation and reduced the release of corresponding pro-inflammatory cytokines. Finally, L-fucose can inhibit the expression of p-NF-kB in vivo and in vitro. Overall, our results show that L-fucose can attenuate colitis by inhibiting macrophage M1 polarization, inhibiting NLRP3 inflammasome and NF-kB activation, and down-regulation of pro-inflammatory cytokines.
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Affiliation(s)
- Ruohang He
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Ying Li
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Chaoqun Han
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Rong Lin
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Wei Qian
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Xiaohua Hou
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China.
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9
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Zhu L, Gu P, Shen H. Protective effects of berberine hydrochloride on DSS-induced ulcerative colitis in rats. Int Immunopharmacol 2019; 68:242-251. [PMID: 30743078 DOI: 10.1016/j.intimp.2018.12.036] [Citation(s) in RCA: 149] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 11/27/2018] [Accepted: 12/14/2018] [Indexed: 11/27/2022]
Abstract
BACKGROUND Berberine hydrochloride is one the effective compound among Rhizoma Coptidis, Cortex Phellodendri, and other plants. There are several clinical functions of berberine hydrochloride including anti-inflammation, antitumor and immunoregulatory. However, the anti-inflammatory of berberine hydrochloride in ulcerative colitis is barely understood. In this study, we aimed to explore the effects of berberine hydrochloride on dextran sulfate sodium (DSS)-induced rats model of ulcerative colitis. METHODS The severity of colitis were measured by body weight, survial rate, colon length and disease activity index (DAI) score. The cytokines expression include IL-1, IL-1β, IL-4, IL-6, IL-10, IL-12, TNF-α, TGF-β and IFN-γ were performed by RT-PCR and ELISA. Signaling pathway proteins such as p-STAT3, STAT3, p-NF-κB p65 and NF-κB p65 were analyzed by western blot and immunofluorescence. The proteins expression of tight junction were explored using western blotting and immunohistochemistry. RESULT Rats were administered berberine hydrochloride showed less weight loss and longer colon length than the DSS-induced group. The expression of IL-1, IL-1β, IL-6, IL-12, TNF-α, TGF-β and IFN-γ were suppressed, yet the expression of IL-4 and IL-10 were up-regulated by berberine hydrochloride and sulphasalazine treatment compared to the model group. Meanwhile, treatment with berberine hydrochloride effectively increased the expression of SIgA and decreased the expression of iNOS, MPO, MDA. In terms of the biochemical analyses, the results showed that the expression of p-STAT3 was signifcantly increased, while the expression of p-NF-κB (p65) was suppressed compared to the model group via western blot and immunofluorescence analysis. CONCLUSIONS Berberine hydrochloride has beneficial effects in UC. The possible mechanism of anti-inflammatory response by berberine hydrochloride may involve in the blocking of the IL-6/STAT3/NF-κB signaling pathway. Collectively, these fndings provide evidence that berberine hydrochloride might be a useful herb medicine and serve as a promising novel therapy in the treatment of UC in humans.
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Affiliation(s)
- Lei Zhu
- Department of Gastroenterology, Affiliated Hospital of Nanjing University of Traditional Chinese Medicine (Jiang Su Province Hospital of TCM), Nan Jing, 210029, Jiang Su Province, China
| | - PeiQing Gu
- Department of Gastroenterology, Affiliated Hospital of Nanjing University of Traditional Chinese Medicine (Jiang Su Province Hospital of TCM), Nan Jing, 210029, Jiang Su Province, China
| | - Hong Shen
- Department of Gastroenterology, Affiliated Hospital of Nanjing University of Traditional Chinese Medicine (Jiang Su Province Hospital of TCM), Nan Jing, 210029, Jiang Su Province, China.
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10
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Nikolic A, Simovic Markovic B, Gazdic M, Randall Harrell C, Fellabaum C, Jovicic N, Djonov V, Arsenijevic N, L Lukic M, Stojkovic M, Volarevic V. Intraperitoneal administration of mesenchymal stem cells ameliorates acute dextran sulfate sodium-induced colitis by suppressing dendritic cells. Biomed Pharmacother 2018; 100:426-432. [PMID: 29471245 DOI: 10.1016/j.biopha.2018.02.060] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 02/02/2018] [Accepted: 02/13/2018] [Indexed: 12/20/2022] Open
Abstract
Dendritic cells (DCs) have important pathogenic role in the induction and progression of ulcerative colitis (UC), but their role in mesenchymal stem cells (MSCs)-mediated suppression of colon injury and inflammation is not revealed. By using dextran sodium sulfate (DSS)-induced colitis, a well-established murine model of UC, we examined effects of MSCs on phenotype and function of colon infiltrating DCs. Clinical, histological, immunophenotypic analysis and passive transfer of MSCs-primed DCs were used to evaluate capacity of MSC to suppress inflammatory phenotype of DCs in vivo. Additionally, DCs:MSCs interplay was also investigated in vitro, to confirmed in vivo obtained findings. Intraperitoneally administered MSCs (2 × 106) significantly reduced progression of DSS-induced colitis and reduced serum levels of inflammatory cytokines (IL-1β, IL-12, and IL-6). Passive transfer of in vivo MSCs-primed DCs reduced severity of colitis while passive transfer of MSCs-non-primed DCs aggravated DSS-induced colitis. Through the secretion of immunomodulatory Galectin 3, MSCs, in paracrine manner, down-regulated production of inflammatory cytokines in DCs and attenuated expression of co-stimulatory and major histocompatibility complex class II molecules on their membranes. Taken together, these results indicate that MSCs achieved their beneficial effects in DSS-induced colitis by suppressing inflammatory phenotype of DCs in Gal-3 dependent manner. Therapeutic targeting of DCs by MSCs should be explored in future studies as a useful approach for the treatment of UC.
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Affiliation(s)
- Aleksandar Nikolic
- Department of Microbiology and Immunology, Center for Molecular Medicine and Stem Cell Research, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - Bojana Simovic Markovic
- Department of Microbiology and Immunology, Center for Molecular Medicine and Stem Cell Research, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - Marina Gazdic
- Department of Genetics, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - C Randall Harrell
- Regenerative Processing Plant, LLC, Palm Harbor, Florida, United States
| | - Crissy Fellabaum
- Regenerative Processing Plant, LLC, Palm Harbor, Florida, United States
| | - Nemanja Jovicic
- Department of Microbiology and Immunology, Center for Molecular Medicine and Stem Cell Research, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | | | - Nebojsa Arsenijevic
- Department of Microbiology and Immunology, Center for Molecular Medicine and Stem Cell Research, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - Miodrag L Lukic
- Department of Microbiology and Immunology, Center for Molecular Medicine and Stem Cell Research, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - Miodrag Stojkovic
- Department of Genetics, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia; Spebo Medical, Leskovac, Serbia
| | - Vladislav Volarevic
- Department of Microbiology and Immunology, Center for Molecular Medicine and Stem Cell Research, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia.
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11
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Statovci D, Aguilera M, MacSharry J, Melgar S. The Impact of Western Diet and Nutrients on the Microbiota and Immune Response at Mucosal Interfaces. Front Immunol 2017; 8:838. [PMID: 28804483 PMCID: PMC5532387 DOI: 10.3389/fimmu.2017.00838] [Citation(s) in RCA: 290] [Impact Index Per Article: 41.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Accepted: 07/03/2017] [Indexed: 12/11/2022] Open
Abstract
Recent findings point toward diet having a major impact on human health. Diets can either affect the gut microbiota resulting in alterations in the host’s physiological responses or by directly targeting the host response. The microbial community in the mammalian gut is a complex and dynamic system crucial for the development and maturation of both systemic and mucosal immune responses. Therefore, the complex interaction between available nutrients, the microbiota, and the immune system are central regulators in maintaining homeostasis and fighting against invading pathogens at mucosal sites. Westernized diet, defined as high dietary intake of saturated fats and sucrose and low intake of fiber, represent a growing health risk contributing to the increased occurrence of metabolic diseases, e.g., diabetes and obesity in countries adapting a westernized lifestyle. Inflammatory bowel diseases (IBD) and asthma are chronic mucosal inflammatory conditions of unknown etiology with increasing prevalence worldwide. These conditions have a multifactorial etiology including genetic factors, environmental factors, and dysregulated immune responses. Their increased prevalence cannot solely be attributed to genetic considerations implying that other factors such as diet can be a major contributor. Recent reports indicate that the gut microbiota and modifications thereof, due to a consumption of a diet high in saturated fats and low in fibers, can trigger factors regulating the development and/or progression of both conditions. While asthma is a disease of the airways, increasing evidence indicates a link between the gut and airways in disease development. Herein, we provide a comprehensive review on the impact of westernized diet and associated nutrients on immune cell responses and the microbiota and how these can influence the pathology of IBD and asthma.
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Affiliation(s)
- Donjete Statovci
- APC Microbiome Institute, University College Cork, Cork, Ireland
| | - Mònica Aguilera
- APC Microbiome Institute, University College Cork, Cork, Ireland
| | - John MacSharry
- APC Microbiome Institute, University College Cork, Cork, Ireland.,School of Microbiology, University College Cork, Cork, Ireland
| | - Silvia Melgar
- APC Microbiome Institute, University College Cork, Cork, Ireland
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12
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Free immunoglobulin light chain (FLC) promotes murine colitis and colitis-associated colon carcinogenesis by activating the inflammasome. Sci Rep 2017; 7:5165. [PMID: 28701727 PMCID: PMC5507933 DOI: 10.1038/s41598-017-05468-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Accepted: 05/31/2017] [Indexed: 01/10/2023] Open
Abstract
Numerous studies have demonstrated that free Ig light chain (FLC), a novel inflammation mediator, participates in many inflammatory diseases by activating mast cells and extending the survival of neutrophils. However, it remains unclear whether FLC is involved in colitis and colitis-associated colon carcinogenesis (CAC). In this study, we found a significant increase in FLC in murine models of DSS (Dextran Sulfate Sodium Salt)-induced colitis and CAC compared to controls. Peptide F991, a functional blocker of FLC, significantly attenuated colitis progression, which included abrogating the development of diarrhea and tumor burden, elevating survival rate, greatly reducing the infiltration of inflammatory cells (such as ROS+ active neutrophils), especially reducing tumorigenesis in CAC. Furthermore, we demonstrated that F991 inhibited the activation of the inflammasome by reducing the expression of cleaved caspase-1 and the maturation of IL-1β and IL-18. Altogether, our findings demonstrate that FLC can promote the pathogenesis of colitis and CAC and may be used as novel biomarker for the diagnosis of inflammatory bowel disease. Additionally, F991 may become a potential therapeutic option for colitis or colorectal cancer.
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13
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Chebli K, Papon L, Paul C, Garcel A, Campos N, Scherrer D, J Ehrlich H, Hahne M, Tazi J. The Anti-Hiv Candidate Abx464 Dampens Intestinal Inflammation by Triggering Il-22 Production in Activated Macrophages. Sci Rep 2017; 7:4860. [PMID: 28687795 PMCID: PMC5501810 DOI: 10.1038/s41598-017-04071-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Accepted: 05/09/2017] [Indexed: 01/16/2023] Open
Abstract
The progression of human immunodeficiency virus (HIV) is associated with mucosal damage in the gastrointestinal (GI) tract. This damage enables bacterial translocation from the gut and leads to subsequent inflammation. Dextran sulfate sodium (DSS-exposure) is an established animal model for experimental colitis that was recently shown to recapitulate the link between GI-tract damage and pathogenic features of SIV infection. The current study tested the protective properties of ABX464, a first-in-class anti-HIV drug candidate currently in phase II clinical trials. ABX464 treatment strongly attenuated DSS-induced colitis in mice and produced a long-term protection against prolonged DSS-exposure after drug cessation. Consistently, ABX464 reduced the colonic production of the inflammatory cytokines IL-6 and TNFα as well as that of the chemoattractant MCP-1. However, RNA profiling analysis revealed the capacity of ABX464 to induce the expression of IL-22, a cytokine involved in colitis tissue repair, both in DSS-treated mice and in LPS-stimulated bone marrow-derived macrophages. Importantly, anti-IL-22 antibodies significantly reduced the protective effect of ABX464 on colitis in DSS-treated mice. Because reduced IL-22 production in the gut mucosa is an established factor of HIV and DSS-induced immunopathogenesis, our data suggest that the anti-inflammatory properties of ABX464 warrant exploration in both HIV and inflammatory ulcerative colitis (UC) disease.
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Affiliation(s)
- Karim Chebli
- IGMM, CNRS, Univ. Montpellier, Montpellier, France, 1919 route de Mende, 34293, Montpellier Cedex 5, Montpellier, France
| | - Laura Papon
- IGMM, CNRS, Univ. Montpellier, Montpellier, France, 1919 route de Mende, 34293, Montpellier Cedex 5, Montpellier, France
| | - Conception Paul
- IGMM, CNRS, Univ. Montpellier, Montpellier, France, 1919 route de Mende, 34293, Montpellier Cedex 5, Montpellier, France
| | - Aude Garcel
- ABIVAX, 1919 route de Mende, 34293, Montpellier Cedex 5, Montpellier, France
| | - Noëlie Campos
- ABIVAX, 1919 route de Mende, 34293, Montpellier Cedex 5, Montpellier, France
| | - Didier Scherrer
- ABIVAX, 1919 route de Mende, 34293, Montpellier Cedex 5, Montpellier, France
| | - Hartmut J Ehrlich
- ABIVAX, 1919 route de Mende, 34293, Montpellier Cedex 5, Montpellier, France
| | - Michael Hahne
- IGMM, CNRS, Univ. Montpellier, Montpellier, France, 1919 route de Mende, 34293, Montpellier Cedex 5, Montpellier, France.
| | - Jamal Tazi
- IGMM, CNRS, Univ. Montpellier, Montpellier, France, 1919 route de Mende, 34293, Montpellier Cedex 5, Montpellier, France.
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14
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Lee HN, Tian L, Bouladoux N, Davis J, Quinones M, Belkaid Y, Coligan JE, Krzewski K. Dendritic cells expressing immunoreceptor CD300f are critical for controlling chronic gut inflammation. J Clin Invest 2017; 127:1905-1917. [PMID: 28414292 DOI: 10.1172/jci89531] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Accepted: 02/16/2017] [Indexed: 12/14/2022] Open
Abstract
Proinflammatory cytokine overproduction and excessive cell death, coupled with impaired clearance of apoptotic cells, have been implicated as causes of failure to resolve gut inflammation in inflammatory bowel diseases. Here we have found that dendritic cells expressing the apoptotic cell-recognizing receptor CD300f play a crucial role in regulating gut inflammatory responses in a murine model of colonic inflammation. CD300f-deficient mice failed to resolve dextran sulfate sodium-induced colonic inflammation as a result of defects in dendritic cell function that were associated with abnormal accumulation of apoptotic cells in the gut. CD300f-deficient dendritic cells displayed hyperactive phagocytosis of apoptotic cells, which stimulated excessive TNF-α secretion predominantly from dendritic cells. This, in turn, induced secondary IFN-γ overproduction by colonic T cells, leading to prolonged gut inflammation. Our data highlight a previously unappreciated role for dendritic cells in controlling gut homeostasis and show that CD300f-dependent regulation of apoptotic cell uptake is essential for suppressing overactive dendritic cell-mediated inflammatory responses, thereby controlling the development of chronic gut inflammation.
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15
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Yokota-Nakatsuma A, Ohoka Y, Takeuchi H, Song SY, Iwata M. Beta 1-integrin ligation and TLR ligation enhance GM-CSF-induced ALDH1A2 expression in dendritic cells, but differentially regulate their anti-inflammatory properties. Sci Rep 2016; 6:37914. [PMID: 27897208 PMCID: PMC5126582 DOI: 10.1038/srep37914] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Accepted: 11/03/2016] [Indexed: 12/11/2022] Open
Abstract
Retinoic acid (RA)–producing CD103+ mature dendritic cells (DCs) in mesenteric lymph nodes (MLNs) play crucial roles in gut immunity. GM-CSF and RA contribute to the expression of the RA-producing enzyme ALDH1A2. However, additional signals appeared to be required for inducing ALDH1A2high mature DCs from immature DCs. We found here that TLR ligands (Ls) and immobilized E-cadherin could provide such signals in FLT3-L–generated bone marrow (BM)–derived DCs after treatment with GM-CSF and the RA receptor agonist Am80. The TLR-L-treated DCs produced proinflammatory cytokines unlike normal ALDH1A2high MLN-DCs, whereas the E-cadherin-treated DCs did not. Immobilized VCAM-1 and semaphorin 7 A exerted effects similar to those of E-cadherin. Soluble anti-integrin β1 antibodies or inhibitors of integrin signaling molecules suppressed the effects of these immobilized proteins, whereas immobilized anti-integrin β1 antibodies enhanced the GM-CSF/Am80-induced ALDH1A2 expression without inducing proinflammatory cytokines. Sequential stimulation of splenic pre-DCs with GM-CSF/Am80 and immobilized E-cadherin or anti-integrin β1 antibody also induced differentiation to mature DCs with high ALDH activity. The E-cadherin-treated BM-DCs induced gut-tropic Foxp3+ T cells and alleviated DSS–induced colitis, whereas the TLR-L-treated DCs aggravated DSS–induced colitis. The results suggest that integrin β1-mediated signals contribute to the differentiation and maturation of RA-producing anti-inflammatory DCs.
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Affiliation(s)
- Aya Yokota-Nakatsuma
- Laboratory of Immunology, Kagawa School of Pharmaceutical Sciences, Tokushima Bunri University, Shido, Sanuki-shi, Kagawa, Japan.,Japan Science and Technology Agency, CREST, Chiyoda-ku, Tokyo, Japan
| | - Yoshiharu Ohoka
- Laboratory of Immunology, Kagawa School of Pharmaceutical Sciences, Tokushima Bunri University, Shido, Sanuki-shi, Kagawa, Japan.,Japan Science and Technology Agency, CREST, Chiyoda-ku, Tokyo, Japan
| | - Hajime Takeuchi
- Laboratory of Immunology, Kagawa School of Pharmaceutical Sciences, Tokushima Bunri University, Shido, Sanuki-shi, Kagawa, Japan.,Japan Science and Technology Agency, CREST, Chiyoda-ku, Tokyo, Japan
| | - Si-Young Song
- Japan Science and Technology Agency, CREST, Chiyoda-ku, Tokyo, Japan.,Institute of Neuroscience, Tokushima Bunri University, Shido, Sanuki-shi, Kagawa, Japan
| | - Makoto Iwata
- Laboratory of Immunology, Kagawa School of Pharmaceutical Sciences, Tokushima Bunri University, Shido, Sanuki-shi, Kagawa, Japan.,Japan Science and Technology Agency, CREST, Chiyoda-ku, Tokyo, Japan
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16
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Zhang W, Xu L, Cho SY, Min KJ, Oda T, Zhang L, Yu Q, Jin JO. Ginseng Berry Extract Attenuates Dextran Sodium Sulfate-Induced Acute and Chronic Colitis. Nutrients 2016; 8:199. [PMID: 27058552 PMCID: PMC4848668 DOI: 10.3390/nu8040199] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Revised: 03/25/2016] [Accepted: 03/29/2016] [Indexed: 12/25/2022] Open
Abstract
This study investigates the in vivo functions of ginseng berry extract (GB) as a therapy for dextran sodium sulfate (DSS)-induced colitis. C57BL/6 mice were given drinking water containing DSS (3%) for eight days to induce acute colitis. At the same time, the mice received an oral dose of GB (50 mg/kg) once daily. The GB-treated mice were less susceptible to the development of acute colitis than were control mice treated with saline, as determined by weight loss, disease activity, and colon histology. The administration of GB to DSS-treated mice also reduced the numbers and inhibited the activation of colon-infiltrating T cells, neutrophils, intestinal CD103(-)CD11c⁺ dendritic cells (cDCs), and macrophages. In addition, GB treatment promoted the migration of CD103⁺CD11c⁺ cDCs and expansion of Foxp3⁺ regulatory T cells in the colons of DSS-treated mice. Similarly, in the DSS-induced chronic colitis model, GB treatment improved the macroscopic and histological appearance of the colon wall when compared to untreated control mice, as indicated by longer colon length and lower histological scores. This is the first report to show that oral administration of GB suppresses immune activation and protects against experimentally induced colitis.
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Affiliation(s)
- Wei Zhang
- Shanghai Public Health Clinical Center, Shanghai Medical College, Fudan University, Shanghai 201508, China.
| | - Li Xu
- Shanghai Public Health Clinical Center, Shanghai Medical College, Fudan University, Shanghai 201508, China.
| | - Si-Young Cho
- R & D Unit, AmorePacific Corporation, 1920 Yonggudae-ro, Giheung-gu, Yongin-si, Gyeonggi-do 17074, Korea.
| | - Kyung-Jin Min
- Department of Biological Sciences, Inha University, Incheon 22212, Korea.
| | - Tatsuya Oda
- Division of Biochemistry, Faculty of Fisheries, Nagasaki University, Nagasaki 55001, Japan.
| | - LiJun Zhang
- Shanghai Public Health Clinical Center, Shanghai Medical College, Fudan University, Shanghai 201508, China.
| | - Qing Yu
- Department of Immunology and Infectious Diseases, The Forsyth Institute, 245 First Street, Cambridge, MA 02142, USA.
- Department of Oral Medicine, Infection and Immunity, Harvard School of Dental Medicine, Boston, MA 02115, USA.
| | - Jun-O Jin
- Shanghai Public Health Clinical Center, Shanghai Medical College, Fudan University, Shanghai 201508, China.
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17
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Abstract
BACKGROUND Toll-like receptor (TLR) expression in patients with inflammatory bowel disease is increased when compared with healthy controls. However, the impact of TLR signaling during inflammatory bowel disease is not fully understood. METHODS In this study, we used a murine model of acute phase inflammation in bone marrow chimeric mice to investigate in which cell type TLR2/4 signal induction is important in preventing intestinal inflammation and how intestinal dendritic cells are influenced. Mice were either fed with wild-type bacteria, able to initiate the TLR2/4 signaling cascade, or with mutant strains with impaired signal induction capacity. RESULTS The induction of the TLR2/4 signal cascade in epithelial cells resulted in inflammation in bone marrow chimeric mice, whereas induction in hematopoietic cells had an opposed function. Furthermore, feeding of wild-type bacteria prevented disease; however, differing signal induction of bacteria had no effect on lamina propria dendritic cell activation. In contrast, functional TLR2/4 signals resulted in increased frequencies of CD103-expressing lamina propria and mesenteric lymph node dendritic cells, which were able to ameliorate disease. CONCLUSIONS The TLR-mediated amelioration of disease, the increase in CD103-expressing cells, and the beneficial function of TLR signal induction in hematopoietic cells indicate that the increased expression of TLRs in patients with inflammatory bowel disease might result in counterregulation of the host and serve in preventing disease.
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18
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Abstract
The innate immune system is a key factor in understanding the pathogenesis of inflammatory bowel disease (IBD) and in the hopes of improving its treatment. NOD2, a pattern recognition receptor, was one of the first major susceptibility genes identified in Crohn's disease (CD). This discovery has been followed by genome-wide association studies that have identified other genes involved in innate immune responses. Most notably, polymorphisms in the interleukin (IL)-23 receptor have also been linked to IBD - both CD and ulcerative colitis. At the core of the innate immune defects associated with IBD is a lack of generating a robust response to control invasive commensal or pathogenic bacteria. The defect sometimes lies in a failure of the epithelium to express antimicrobial peptides or in defective control of intracellular bacteria by phagocytic cells such as dendritic cells, macrophages, or neutrophils. The recent identification of innate lymphoid cells that express the IL-23 receptor and generate both proinflammatory and protective or regulatory responses to commensal or pathogenic bacteria provides another layer of complexity to the interplay of host protection and dysregulated inflammation. Although inhibition of tumor necrosis factor has been highly successful as a strategy in treating IBD, we must better understand the nuanced role of other innate cytokines before we may incorporate these in the treatment of IBD.
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Affiliation(s)
- Julie M Davies
- Miller School of Medicine, University of Miami , Miami Fl , USA
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19
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Martínez-Augustin O, Rivero-Gutiérrez B, Mascaraque C, Sánchez de Medina F. Food derived bioactive peptides and intestinal barrier function. Int J Mol Sci 2014; 15:22857-73. [PMID: 25501338 PMCID: PMC4284742 DOI: 10.3390/ijms151222857] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Revised: 11/18/2014] [Accepted: 12/02/2014] [Indexed: 12/13/2022] Open
Abstract
A wide range of food-derived bioactive peptides have been shown to exert health-promoting actions and are therefore considered functional foods or nutraceuticals. Some of these actions are related to the maintenance, reinforcement or repairment of the intestinal barrier function (IBF) whose role is to selectively allow the absorption of water, nutrients and ions while preventing the influx of microorganisms from the intestinal lumen. Alterations in the IBF have been related to many disorders, such as inflammatory bowel disease or metabolic syndrome. Components of IBF are the intestinal epithelium, the mucus layer, secretory immunoglobulin A and cells of the innate and adaptive immune systems. Here we review the effects of food derived bioactive peptides on these IBF components. In vitro and in vivo effects, both in healthy and disease states, have been reviewed. Although limited, the available information indicates a potential for food-derived peptides to modify IBF and to contribute to disease treatment, but further research is needed to better isolate responsible peptides, and to help define their mode of action.
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Affiliation(s)
- Olga Martínez-Augustin
- Department of Biochemistry and Molecular Biology 2, CIBERehd, University of Granada, Instituto de Investigación Biosanitaria ibs, Granada 18071, Spain.
| | - Belén Rivero-Gutiérrez
- Department of Pharmacology, CIBERehd, University of Granada, Instituto de Investigación Biosanitaria ibs, Granada 18071, Spain.
| | - Cristina Mascaraque
- IBD Center, Laboratory of Immunology in Gastroenterology, Humanitas Clinical and Research Center, Milan 20089, Italy.
| | - Fermín Sánchez de Medina
- Department of Pharmacology, CIBERehd, University of Granada, Instituto de Investigación Biosanitaria ibs, Granada 18071, Spain.
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20
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Abstract
Intestinal mucosal barrier function is the capacity of the intestine to provide adequate containment of luminal microorganisms and molecules while preserving the ability to absorb nutrients. The central element is the epithelial layer, which physically separates the lumen and the internal milieu and is in charge of vectorial transport of ions, nutrients, and other substances. The secretion of mucus-forming mucins, sIgA, and antimicrobial peptides reinforces the mucosal barrier on the extraepithelial side, while a variety of immune cells contributes to mucosal defense in the inner side. Thus, the mucosal barrier is of physical, biochemical, and immune nature. In addition, the microbiota may be viewed as part of this system because of the mutual influence occurring between the host and the luminal microorganisms. Alteration of the mucosal barrier function with accompanying increased permeability and/or bacterial translocation has been linked with a variety of conditions, including inflammatory bowel disease. Genetic and environmental factors may converge to evoke a defective function of the barrier, which in turn may lead to overt inflammation of the intestine as a result of an exacerbated immune reaction toward the microbiota. According to this hypothesis, inflammatory bowel disease may be both precipitated and treated by either stimulation or downregulation of the different elements of the mucosal barrier, with the outcome depending on timing, the cell type affected, and other factors. In this review, we cover briefly the elements of the barrier and their involvement in functional defects and the resulting phenotype.
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21
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Moriwaki K, Balaji S, McQuade T, Malhotra N, Kang J, Chan FKM. The necroptosis adaptor RIPK3 promotes injury-induced cytokine expression and tissue repair. Immunity 2014; 41:567-78. [PMID: 25367573 PMCID: PMC4220270 DOI: 10.1016/j.immuni.2014.09.016] [Citation(s) in RCA: 281] [Impact Index Per Article: 28.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2014] [Accepted: 09/26/2014] [Indexed: 11/21/2022]
Abstract
Programmed necrosis or necroptosis is an inflammatory form of cell death that critically requires the receptor-interacting protein kinase 3 (RIPK3). Here we showed that RIPK3 controls a separate, necrosis-independent pathway of inflammation by regulating cytokine expression in dendritic cells (DCs). Ripk3(-/-) bone-marrow-derived dendritic cells (BMDCs) were highly defective in lipopolysaccharide (LPS)-induced expression of inflammatory cytokines. These effects were caused by impaired NF-κB subunit RelB and p50 activation and by impaired caspase 1-mediated processing of interleukin-1β (IL-1β). This DC-specific function of RIPK3 was critical for injury-induced inflammation and tissue repair in response to dextran sodium sulfate (DSS). Ripk3(-/-) mice exhibited an impaired axis of injury-induced IL-1β, IL-23, and IL-22 cytokine cascade, which was partially corrected by adoptive transfer of wild-type DCs, but not Ripk3(-/-) DCs. These results reveal an unexpected function of RIPK3 in NF-κB activation, DC biology, innate inflammatory-cytokine expression, and injury-induced tissue repair.
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Affiliation(s)
- Kenta Moriwaki
- Department of Pathology, Immunology and Microbiology Program, University of Massachusetts Medical School, Worcester, MA 01655, USA
| | - Sakthi Balaji
- Department of Pathology, Immunology and Microbiology Program, University of Massachusetts Medical School, Worcester, MA 01655, USA
| | - Thomas McQuade
- Department of Pathology, Immunology and Microbiology Program, University of Massachusetts Medical School, Worcester, MA 01655, USA
| | - Nidhi Malhotra
- Department of Pathology, Immunology and Microbiology Program, University of Massachusetts Medical School, Worcester, MA 01655, USA
| | - Joonsoo Kang
- Department of Pathology, Immunology and Microbiology Program, University of Massachusetts Medical School, Worcester, MA 01655, USA
| | - Francis Ka-Ming Chan
- Department of Pathology, Immunology and Microbiology Program, University of Massachusetts Medical School, Worcester, MA 01655, USA.
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Abstract
In the healthy gastrointestinal tract, homeostasis is an active process that requires a careful balance of host responses to the enteric luminal contents. Intestinal macrophages and dendritic cells (DCs) comprise a unique group of tissue immune cells that are ideally situated at the interface of the host and the enteric luminal environment to appropriately respond to microbes and ingested stimuli. However, intrinsic defects in macrophage and DC function contribute to the pathogenesis of inflammatory bowel diseases, as highlighted by recent genome-wide association studies. Gastrointestinal macrophages and DCs participate in inflammatory bowel disease development through inappropriate responses to enteric microbial stimuli, inefficient clearance of microbes from host tissues, and impaired transition from appropriate proinflammatory responses to anti-inflammatory responses that promote resolution. By understanding how intestinal macrophages and DCs initiate chronic inflammation, new pathogenesis-based therapeutic strategies to treat human inflammatory bowel diseases will be elucidated.
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23
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Tuna H, Avdiushko RG, Sindhava VJ, Wedlund L, Kaetzel CS, Kaplan AM, Bondada S, Cohen DA. Regulation of the mucosal phenotype in dendritic cells by PPARγ: role of tissue microenvironment. J Leukoc Biol 2013; 95:471-85. [PMID: 24295831 DOI: 10.1189/jlb.0713408] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Mucosal DCs play a critical role in tissue homeostasis. Several stimuli can induce a mucosal phenotype; however, molecular pathways that regulate development of mucosal DC function are relatively unknown. This study sought to determine whether PPARγ contributes to the development of the "mucosal" phenotype in mouse DCs. Experiments demonstrated that PPARγ activation in BMDCs induced an immunosuppressive phenotype in which BMDCs had reduced expression of MHC class II and costimulatory molecules, increased IL-10 secretion, and reduced the ability to induce CD4 T cell proliferation. Activation of PPARγ enhanced the ability of BMDC to polarize CD4 T cells toward iTregs and to induce T cell expression of the mucosal homing receptor, CCR9. Activation of PPARγ increased the ability of BMDCs to induce T cell-independent IgA production in B cells. BMDCs from PPARγ(ΔDC) mice displayed enhanced expression of costimulatory molecules, enhanced proinflammatory cytokine production, and decreased IL-10 synthesis. Contrary to the inflammatory BMDC phenotype in vitro, PPARγ(ΔDC) mice showed no change in the frequency or phenotype of mDC in the colon. In contrast, mDCs in the lungs were increased significantly in PPARγ(ΔDC) mice. A modest increase in colitis severity was observed in DSS-treated PPARγ(ΔDC) mice compared with control. These results indicate that PPARγ activation induces a mucosal phenotype in mDCs and that loss of PPARγ promotes an inflammatory phenotype. However, the intestinal microenvironment in vivo can maintain the mucosal DC phenotype of via PPARγ-independent mechanisms.
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Affiliation(s)
- Halide Tuna
- 1.Immunology and Molecular Genetics, University of Kentucky, 800 Rose St., Room MS419, Lexington, KY 40536-0298, USA.
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Validation of bovine glycomacropeptide as an intestinal anti-inflammatory nutraceutical in the lymphocyte-transfer model of colitis. Br J Nutr 2013; 111:1202-12. [PMID: 24229852 DOI: 10.1017/s0007114513003590] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Milk κ-casein-derived bovine glycomacropeptide (GMP) exerts immunomodulatory effects. It exhibits intestinal anti-inflammatory activity in chemically induced models of colitis. However, to validate its clinical usefulness as a nutraceutical, it is important to assess its effects in a model with a closer pathophysiological connection with human inflammatory bowel disease. Therefore, in the present study, we used the lymphocyte-transfer model of colitis in mice and compared the effects of GMP in this model with those obtained in the dextran sulphate sodium (DSS) model. GMP (15 mg/d) resulted in higher body-weight gain and a reduction of the colonic damage score and myeloperoxidase (MPO) activity in Rag1(-/-) mice with colitis induced by the transfer of naïve T cells. The colonic and ileal weight:length ratio was decreased by approximately 25%, albeit non-significantly. GMP treatment reduced the percentage of CD4⁺ interferon (IFN)-γ⁺ cells in mesenteric lymph nodes (MLN). The basal production of IL-6 by MLN obtained from the GMP-treated mice ex vivo was augmented. However, concanavalin A-evoked production was similar. The colonic expression of regenerating islet-derived protein 3γ, S100A8, chemokine (C-X-C motif) ligand 1 and IL-1β was unaffected by GMP, while that of TNF-α and especially IFN-γ was paradoxically increased. In the DSS model, GMP also reduced the activity of colonic MPO, but it failed to alter weight gain or intestinal weight:length ratio. GMP augmented the production of IL-10 by MLN cells and was neutral towards other cytokines, except exhibiting a trend towards increasing the production of IL-6. The lower effect was attributed to the lack of the effect of GMP on epithelial cells. In conclusion, GMP exerts intestinal anti-inflammatory effects in lymphocyte-driven colitis.
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Williams CS, Bradley AM, Chaturvedi R, Singh K, Piazuelo MB, Chen X, McDonough EM, Schwartz DA, Brown CT, Allaman MM, Coburn LA, Horst SN, Beaulieu DB, Choksi YA, Washington MK, Williams AD, Fisher MA, Zinkel SS, Peek RM, Wilson KT, Hiebert SW. MTG16 contributes to colonic epithelial integrity in experimental colitis. Gut 2013; 62:1446-55. [PMID: 22833394 PMCID: PMC3663894 DOI: 10.1136/gutjnl-2011-301439] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
OBJECTIVE The myeloid translocation genes (MTGs) are transcriptional corepressors with both Mtg8(-/-) and Mtgr1(-/-) mice showing developmental and/or differentiation defects in the intestine. We sought to determine the role of MTG16 in intestinal integrity. METHODS Baseline and stress induced colonic phenotypes were examined in Mtg16(-/-) mice. To unmask phenotypes, we treated Mtg16(-/-) mice with dextran sodium sulphate (DSS) or infected them with Citrobacter rodentium and the colons were examined for ulceration and for changes in proliferation, apoptosis and inflammation. RESULTS Mtg16(-/-) mice have altered immune subsets, suggesting priming towards Th1 responses. Mtg16(-/-) mice developed increased weight loss, diarrhoea, mortality and histological colitis and there were increased innate (Gr1(+), F4/80(+), CD11c(+) and MHCII(+); CD11c(+)) and Th1 adaptive (CD4) immune cells in Mtg16(-/-) colons after DSS treatment. Additionally, there was increased apoptosis and a compensatory increased proliferation in Mtg16(-/-) colons. Compared with wild-type mice, Mtg16(-/-) mice exhibited increased colonic CD4;IFN-γ cells in vehicle-treated and DSS-treated mice. Adoptive transfer of wild-type marrow into Mtg16(-/-) recipients did not rescue the Mtg16(-/-) injury phenotype. Isolated colonic epithelial cells from DSS-treated Mtg16(-/-) mice exhibited increased KC (Cxcl1) mRNA expression when compared with wild-type mice. Mtg16(-/-) mice infected with C rodentium had more severe colitis and greater bacterial colonisation. Last, MTG16 mRNA levels were reduced in human ulcerative colitis versus normal colon tissues. CONCLUSIONS These observations indicate that MTG16 is critical for colonocyte survival and regeneration in response to intestinal injury and provide evidence that this transcriptional corepressor regulates inflammatory recruitment in response to injury.
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Affiliation(s)
- Christopher S Williams
- Department of Medicine, Division of Gastroenterology, Vanderbilt University, Nashville, Tennessee, USA,Department of Cancer Biology, Vanderbilt University, Nashville, Tennessee, USA,Vanderbilt Ingram Cancer Center, Nashville, Tennessee, USA,Veterans Affairs Tennessee Valley Healthcare System, Nashville, Tennessee, USA
| | - Amber M Bradley
- Department of Medicine, Division of Gastroenterology, Vanderbilt University, Nashville, Tennessee, USA
| | - Rupesh Chaturvedi
- Department of Medicine, Division of Gastroenterology, Vanderbilt University, Nashville, Tennessee, USA,Veterans Affairs Tennessee Valley Healthcare System, Nashville, Tennessee, USA
| | - Kshipra Singh
- Department of Medicine, Division of Gastroenterology, Vanderbilt University, Nashville, Tennessee, USA,Veterans Affairs Tennessee Valley Healthcare System, Nashville, Tennessee, USA
| | - Maria B Piazuelo
- Department of Medicine, Division of Gastroenterology, Vanderbilt University, Nashville, Tennessee, USA
| | - Xi Chen
- Department of Biostatistics, Vanderbilt University, Nashville, Tennessee, USA
| | - Elizabeth M McDonough
- Department of Pediatrics, Division of Pediatric Gastroenterology, Vanderbilt University, Nashville, Tennessee, USA
| | - David A Schwartz
- Department of Medicine, Division of Gastroenterology, Vanderbilt University, Nashville, Tennessee, USA
| | - Caroline T Brown
- Department of Medicine, Division of Gastroenterology, Vanderbilt University, Nashville, Tennessee, USA
| | - Margaret M Allaman
- Department of Medicine, Division of Gastroenterology, Vanderbilt University, Nashville, Tennessee, USA
| | - Lori A Coburn
- Department of Medicine, Division of Gastroenterology, Vanderbilt University, Nashville, Tennessee, USA,Veterans Affairs Tennessee Valley Healthcare System, Nashville, Tennessee, USA
| | - Sara N Horst
- Department of Medicine, Division of Gastroenterology, Vanderbilt University, Nashville, Tennessee, USA,Veterans Affairs Tennessee Valley Healthcare System, Nashville, Tennessee, USA
| | - Dawn B Beaulieu
- Department of Medicine, Division of Gastroenterology, Vanderbilt University, Nashville, Tennessee, USA
| | - Yash A Choksi
- Department of Medicine, Division of Gastroenterology, Vanderbilt University, Nashville, Tennessee, USA
| | | | - Amanda D Williams
- Department of Medicine, Division of Gastroenterology, Vanderbilt University, Nashville, Tennessee, USA
| | - Melissa A Fisher
- Department of Biochemistry, Vanderbilt University, Nashville, Tennessee, USA
| | - Sandra S Zinkel
- Department of Cancer Biology, Vanderbilt University, Nashville, Tennessee, USA,Vanderbilt Ingram Cancer Center, Nashville, Tennessee, USA
| | - Richard M Peek
- Department of Medicine, Division of Gastroenterology, Vanderbilt University, Nashville, Tennessee, USA,Vanderbilt Ingram Cancer Center, Nashville, Tennessee, USA,Veterans Affairs Tennessee Valley Healthcare System, Nashville, Tennessee, USA
| | - Keith T Wilson
- Department of Medicine, Division of Gastroenterology, Vanderbilt University, Nashville, Tennessee, USA,Department of Cancer Biology, Vanderbilt University, Nashville, Tennessee, USA,Vanderbilt Ingram Cancer Center, Nashville, Tennessee, USA,Veterans Affairs Tennessee Valley Healthcare System, Nashville, Tennessee, USA
| | - Scott W Hiebert
- Vanderbilt Ingram Cancer Center, Nashville, Tennessee, USA,Department of Biochemistry, Vanderbilt University, Nashville, Tennessee, USA
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Martínez Gómez JM, Chen L, Schwarz H, Karrasch T. CD137 facilitates the resolution of acute DSS-induced colonic inflammation in mice. PLoS One 2013; 8:e73277. [PMID: 24023849 PMCID: PMC3762711 DOI: 10.1371/journal.pone.0073277] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2013] [Accepted: 07/18/2013] [Indexed: 12/27/2022] Open
Abstract
Background CD137 and its ligand (CD137L) are potent immunoregulatory molecules that influence activation, proliferation, differentiation and cell death of leukocytes. Expression of CD137 is upregulated in the lamina propria cells of Crohn’s disease patients. Here, the role of CD137 in acute Dextran-Sodium-Sulfate (DSS)-induced colitis in mice was examined. Methods We induced acute large bowel inflammation (colitis) via DSS administration in CD137−/− and wild-type (WT) mice. Colitis severity was evaluated by clinical parameters (weight loss), cytokine secretion in colon segment cultures, and scoring of histological inflammatory parameters. Additionally, populations of lamina propria mononuclear cells (LPMNC) and intraepithelial lymphocytes (IEL) were characterized by flow cytometry. In a subset of mice, resolution of intestinal inflammation was evaluated 3 and 7 days after withdrawal of DSS. Results We found that both CD137−/− and WT mice demonstrated a similar degree of inflammation after 5 days of DSS exposure. However, the resolution of colonic inflammation was impaired in the absence of CD137. This was accompanied by a higher histological score of inflammation, and increased release of the pro-inflammatory mediators granulocyte macrophage colony-stimulating factor (GM-CSF), CXCL1, IL-17 and IFN-γ. Further, there were significantly more neutrophils among the LPMNC of CD137−/− mice, and reduced numbers of macrophages among the IEL. Conclusion We conclude that CD137 plays an essential role in the resolution of acute DSS-induced intestinal inflammation in mice.
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Affiliation(s)
- Julia M. Martínez Gómez
- Department of Microbiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Lieping Chen
- Department of Immunobiology, Yale University School of Medicine, New Haven, Connecticut, United States of America
| | - Herbert Schwarz
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- * E-mail: (HS); (TK)
| | - Thomas Karrasch
- Department of Internal Medicine I, University of Regensburg, Regensburg, Germany
- * E-mail: (HS); (TK)
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Frantz AL, Bruno ME, Rogier EW, Tuna H, Cohen DA, Bondada S, Chelvarajan RL, Brandon JA, Jennings CD, Kaetzel CS. Multifactorial patterns of gene expression in colonic epithelial cells predict disease phenotypes in experimental colitis. Inflamm Bowel Dis 2012; 18:2138-48. [PMID: 23070952 PMCID: PMC3476470 DOI: 10.1002/ibd.22923] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2012] [Accepted: 01/27/2012] [Indexed: 12/19/2022]
Abstract
BACKGROUND The pathogenesis of inflammatory bowel disease (IBD) is complex and the need to identify molecular biomarkers is critical. Epithelial cells play a central role in maintaining intestinal homeostasis. We previously identified five "signature" biomarkers in colonic epithelial cells (CEC) that are predictive of disease phenotype in Crohn's disease. Here we investigate the ability of CEC biomarkers to define the mechanism and severity of intestinal inflammation. METHODS We analyzed the expression of RelA, A20, pIgR, tumor necrosis factor (TNF), and macrophage inflammatory protein (MIP)-2 in CEC of mice with dextran sodium sulfate (DSS) acute colitis or T-cell-mediated chronic colitis. Factor analysis was used to combine the five biomarkers into two multifactorial principal components (PCs). PC scores for individual mice were correlated with disease severity. RESULTS For both colitis models, PC1 was strongly weighted toward RelA, A20, and pIgR, and PC2 was strongly weighted toward TNF and MIP-2, while the contributions of other biomarkers varied depending on the etiology of inflammation. Disease severity was correlated with elevated PC2 scores in DSS colitis and reduced PC1 scores in T-cell transfer colitis. Downregulation of pIgR was a common feature observed in both colitis models and was associated with altered cellular localization of pIgR and failure to transport IgA. CONCLUSIONS A multifactorial analysis of epithelial gene expression may be more informative than examining single gene responses in IBD. These results provide insight into the homeostatic and proinflammatory functions of CEC in IBD pathogenesis and suggest that biomarker analysis could be useful for evaluating therapeutic options for IBD patients.
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Affiliation(s)
- Aubrey L. Frantz
- Department of Microbiology, Immunology and Molecular Genetics, University of Kentucky, Lexington, Kentucky
| | - Maria E.C. Bruno
- Department of Microbiology, Immunology and Molecular Genetics, University of Kentucky, Lexington, Kentucky
| | - Eric W. Rogier
- Department of Microbiology, Immunology and Molecular Genetics, University of Kentucky, Lexington, Kentucky
| | - Halide Tuna
- Department of Microbiology, Immunology and Molecular Genetics, University of Kentucky, Lexington, Kentucky
| | - Donald A. Cohen
- Department of Microbiology, Immunology and Molecular Genetics, University of Kentucky, Lexington, Kentucky
| | - Subbarao Bondada
- Department of Microbiology, Immunology and Molecular Genetics, University of Kentucky, Lexington, Kentucky
| | - R. Lakshman Chelvarajan
- Department of Microbiology, Immunology and Molecular Genetics, University of Kentucky, Lexington, Kentucky
| | - J. Anthony Brandon
- Department of Microbiology, Immunology and Molecular Genetics, University of Kentucky, Lexington, Kentucky
| | - C. Darrell Jennings
- Department of Pathology and Laboratory Medicine, University of Kentucky, Lexington, Kentucky
| | - Charlotte S. Kaetzel
- Department of Microbiology, Immunology and Molecular Genetics, University of Kentucky, Lexington, Kentucky
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Systemic macrophage depletion inhibits Helicobacter bilis-induced proinflammatory cytokine-mediated typhlocolitis and impairs bacterial colonization dynamics in a BALB/c Rag2-/- mouse model of inflammatory bowel disease. Infect Immun 2012; 80:4388-97. [PMID: 23027534 DOI: 10.1128/iai.00530-12] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Helicobacter bilis, an enterohepatic helicobacter, is associated with chronic hepatitis in aged immunocompetent inbred mice and inflammatory bowel disease (IBD) in immunodeficient mice. To evaluate the role of macrophages in H. bilis-induced IBD, Rag2(-/-) BALB/c or wild-type (WT) BALB/c mice were either sham dosed or infected with H. bilis Missouri strain under specific-pathogen-free conditions, followed by an intravenous injection of a 0.2-ml suspension of liposomes coated with either phosphate-buffered saline (control) or clodronate (a macrophage depleting drug) at 15 weeks postinfection (wpi). At 16 wpi, the ceca of H. bilis-infected Rag2(-/-) mice treated with control liposomes had significantly higher histopathological lesional scores (for cumulative typhlitis index, inflammation, edema, epithelial defects, and hyperplasia) and higher counts of F4/80(+) macrophages and MPO(+) neutrophils compared to H. bilis-infected Rag2(-/-) mice treated with clodronate liposomes. In addition, cecal quantitative PCR analyses revealed a significant suppression in the expression of macrophage-related cytokine genes, namely, Tnfa, Il-1β, Il-10, Cxcl1, and iNos, in the clodronate-treated H. bilis-infected Rag2(-/-) mice compared to the H. bilis-infected Rag2(-/-) control mice. Finally, cecal quantitative PCR analyses also revealed a significant reduction in bacterial colonization in the clodronate-treated Rag2(-/-) mice. Taken together, our results suggest that macrophages are critical inflammatory cellular mediators for promoting H. bilis-induced typhlocolitis in mice.
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Targeted deletion of MyD88 in intestinal epithelial cells results in compromised antibacterial immunity associated with downregulation of polymeric immunoglobulin receptor, mucin-2, and antibacterial peptides. Mucosal Immunol 2012; 5:501-12. [PMID: 22491177 PMCID: PMC3422608 DOI: 10.1038/mi.2012.23] [Citation(s) in RCA: 154] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Intestinal epithelial cells (IECs) form a physical and immunological barrier that separates the vast gut microbiota from host tissues. MyD88-dependent Toll-like receptor signaling is a key mediator of microbial-host cross-talk. We examined the role of epithelial MyD88 expression by generating mice with an IEC-targeted deletion of the Myd88 gene (MyD88(ΔIEC)). Loss of epithelial MyD88 signaling resulted in increased numbers of mucus-associated bacteria; translocation of bacteria, including the opportunistic pathogen Klebsiella pneumoniae, to mesenteric lymph nodes; reduced transmucosal electrical resistance; impaired mucus-associated antimicrobial activity; and downregulated expression of polymeric immunoglobulin receptor (the epithelial IgA transporter), mucin-2 (the major protein of intestinal mucus), and the antimicrobial peptides RegIIIγ and Defa-rs1. We further observed significant differences in the composition of the gut microbiota between MyD88(ΔIEC) mice and wild-type littermates. These physical, immunological, and microbial defects resulted in increased susceptibility of MyD88(ΔIEC) mice to experimental colitis. We conclude that MyD88 signaling in IECs is crucial for maintenance of gut homeostasis.
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The role of phosphoinositide 3-kinase signaling in intestinal inflammation. JOURNAL OF SIGNAL TRANSDUCTION 2012; 2012:358476. [PMID: 22570785 PMCID: PMC3337621 DOI: 10.1155/2012/358476] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/23/2011] [Accepted: 11/29/2011] [Indexed: 02/07/2023]
Abstract
The phosphatidylinositol 3-kinase signaling pathway plays a central role in regulating the host inflammatory response. The net effect can either be pro- or anti-inflammatory depending on the system and cellular context studied. This paper focuses on phosphatidylinositol 3-kinase signaling in innate and adaptive immune cells of the intestinal mucosa. The role of phosphatidylinositol 3-kinase signaling in mouse models of inflammatory bowel disease is also discussed. With the development of new isoform specific inhibitors, we are beginning to understand the specific role of this complex pathway, in particular the role of the γ isoform in intestinal inflammation. Continued research on this complex pathway will enhance our understanding of its role and provide rationale for the design of new approaches to intervention in chronic inflammatory conditions such as inflammatory bowel disease.
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Hashimoto S, Uto H, Kanmura S, Sakiyama T, Oku M, Iwashita Y, Ibusuki R, Sasaki F, Ibusuki K, Takami Y, Moriuchi A, Oketani M, Ido A, Tsubouchi H. Human neutrophil peptide-1 aggravates dextran sulfate sodium-induced colitis. Inflamm Bowel Dis 2012; 18:667-75. [PMID: 21928371 DOI: 10.1002/ibd.21855] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2011] [Accepted: 07/18/2011] [Indexed: 12/30/2022]
Abstract
BACKGROUND Human neutrophil peptide (HNP)-1, HNP-2, and HNP-3 (HNP-1-3) are useful biomarkers for ulcerative colitis (UC). The precise roles of these peptides in UC are poorly understood, however. The aim of this study was to determine whether HNP-1 affects disease activity in mice with experimental colitis. METHODS Experimental colitis was induced in BALB/c or severe combined immunodeficiency (SCID) mice using dextran sulfate sodium (DSS). Mice were subsequently treated intraperitoneally with HNP-1 (100 μg/day) or phosphate-buffered saline (PBS) from day 4 to day 6. The severity of colitis was evaluated based on a disease activity index, histologic score, and cytokine expression. RESULTS Body weight and colon length significantly decreased and the disease activity index score, histologic score, and myeloperoxidase activity significantly increased in HNP-1-treated BALB/c mice compared with PBS-treated mice. Interferon-γ and tumor necrosis factor-α levels in colon culture supernatants-derived HNP-1-treated mice were also significantly higher, and interleukin (IL)-1β levels tended to increase in response to HNP-1. In addition, treating SCID mice with HNP-1 aggravated DSS-induced colitis and IL-1β levels in colon culture supernatants from these mice were significantly higher than in cultures obtained from control mice. Furthermore, in both BALB/c and SCID mice increased recruitment of F4/80-positive macrophages was observed in the inflamed colonic mucosa following HNP-1 injections. CONCLUSIONS High concentrations of HNP-1 aggravate DSS-induced colitis, including upregulated expression of such macrophage-derived cytokines as IL-1β. These results indicate that high concentrations of HNP-1-3 in patients with UC may exacerbate disease activity via increased cytokine production.
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Affiliation(s)
- Shinichi Hashimoto
- Department of Digestive and Lifestyle Related Disease, Health Research Course, Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
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Detel D, Pugel EP, Pucar LB, Buljevic S, Varljen J. Development and resolution of colitis in mice with target deletion of dipeptidyl peptidase IV. Exp Physiol 2011; 97:486-96. [PMID: 22125312 DOI: 10.1113/expphysiol.2011.061143] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
A role for dipeptidyl peptidase IV (DPP IV/CD26) in the pathogenesis of inflammatory bowel disease has been proposed owing to its involvement in immune regulation via its expression on immune cells and ability to cleave biologically active molecules. The aim of this study was to investigate the influence of DPP IV/CD26 deficiency on development and resolution of dextran sulfate sodium-induced colitis in CD26-deficient (CD26(-/-)) and wild-type (C57BL/6) mice. Colitis was characterized by clinical and histological changes and infiltration of immune cells in the colonic mucosa. In the acute phase of colitis, loss of body mass and disease activity in C57BL/6 mice was more intensive than in CD26(-/-) mice, in spite of similar histopathological changes at the local level. Although acute inflammation induced a significant increase in the number of macrophages and dendritic cells in both mouse strains, in CD26(-/-) mice the increase of macrophages was twice that in C57BL/6 animals (18.0 ± 4.5 versus 41.3 ± 5.8), whereas the increase in dendritic cells was more pronounced in C57BL/6 mice. In the acute phase of colitis, colonic DPP IV/CD26 activity was significantly decreased in C57BL/6 mice compared with healthy animals. The results of our study reveal that DPP IV/CD26 deficiency affects the onset of clinical symptoms and the specific cells infiltrating at the site of inflammation in CD26(-/-) animals, suggesting a pathophysiological role of DPP IV/CD26 and providing new insights into the nature of the immune response activated during the development of colitis.
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Affiliation(s)
- Dijana Detel
- Department of Chemistry and Biochemistry, School of Medicine, University of Rijeka, Bráce Branchetta 20, 51000 Rijeka, Croatia
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Xue H, Sufit AJD, Wischmeyer PE. Glutamine therapy improves outcome of in vitro and in vivo experimental colitis models. JPEN J Parenter Enteral Nutr 2011; 35:188-97. [PMID: 21378248 DOI: 10.1177/0148607110381407] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND Pharmacologic doses of glutamine (GLN) can improve clinical outcome following acute illness and injury. Recent studies indicate enhanced heat shock protein (HSP) expression is a key mechanism underlying GLN's protection. However, such a link has not yet been tested in chronic inflammatory states, such as experimental inflammatory bowel disease (IBD). METHODS Experimental colitis was induced in Sprague-Dawley rats via oral 5% dextran sulfate sodium (DSS) for 7 days. GLN (0.75 g/kg/d) or sham was administered to rats by oral gavage during 7-day DSS treatment. In vitro inflammatory injury was studied using YAMC colonic epithelial cells treated with varying concentrations of GLN and cytokines (tumor necrosis factor-α/interferon-γ). RESULTS Pharmacologic dose, bolus GLN attenuated DSS-induced colitis in vivo with decreased area under curve for bleeding (8.06 ± 0.87 vs 10.38 ± 0.79, P < .05) and diarrhea (6.97 ± 0.46 vs 8.53 ± 0.39, P < .05). This was associated with enhanced HSP25 and HSP70 in colonic mucosa. In vitro, GLN enhanced cell survival and reduced proapoptotic caspase3 and poly(ADP-ribose) polymerase cleavage postcytokine injury. Cytokine-induced inducible nitric oxide synthase expression and nuclear translocation of nuclear factor-κB p65 subunit were markedly attenuated at GLN concentrations above 0.5 mmol/L. GLN increased cellular HSP25 and HSP70 in a dose-dependent manner. CONCLUSIONS These data demonstrate the therapeutic potential of GLN as a "pharmacologically acting nutrient" in the setting of experimental IBD. GLN sufficiency is crucial for the colonic epithelium to mount a cell-protective, antiapoptotic, and anti-inflammatory response against inflammatory injury. The enhanced HSP expression observed following GLN treatment may be responsible for this protective effect.
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Affiliation(s)
- Hongyu Xue
- Department of Anesthesiology, University of Colorado Denver, Anschutz Medical Campus, Aurora, Colorado, USA.
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Abstract
One of the most fundamental problems in immunology is the seemingly schizophrenic ability of the immune system to launch robust immunity against pathogens, while acquiring and maintaining a state of tolerance to the body's own tissues and the trillions of commensal microorganisms and food antigens that confront it every day. A fundamental role for the innate immune system, particularly dendritic cells (DCs), in orchestrating immunological tolerance has been appreciated, but emerging studies have highlighted the nature of the innate receptors and the signaling pathways that program DCs to a tolerogenic state. Furthermore, several studies have emphasized the major role played by cellular interactions and the microenvironment in programming tolerogenic DCs. Here, we review these studies and suggest that the innate control of tolerogenic responses can be viewed as different hierarchies of organization, in which DCs, their innate receptors and signaling networks, and their interactions with other cells and local microenvironments represent different levels of the hierarchy.
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Affiliation(s)
- Santhakumar Manicassamy
- Emory Vaccine Center, Yerkes National Primate Research Center, Department of Pathology, Emory University School of Medicine, Atlanta, GA 30329, USA
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Steinbrecher KA, Harmel-Laws E, Garin-Laflam MP, Mann EA, Bezerra LD, Hogan SP, Cohen MB. Murine guanylate cyclase C regulates colonic injury and inflammation. THE JOURNAL OF IMMUNOLOGY 2011; 186:7205-14. [PMID: 21555532 DOI: 10.4049/jimmunol.1002469] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Guanylate cyclase C (GUCY2C or GC-C) and its ligands, guanylin (GUCA2A or Gn) and uroguanylin (GUCA2B or Ugn), are expressed in intestinal epithelial cells and regulate ion secretion, intestinal barrier function, and epithelial monolayer homeostasis via cGMP-dependent signaling pathways. The aim of this study was to determine whether GC-C and its ligands direct the course of intestinal inflammation. In this article, we show that dextran sodium sulfate (DSS)-induced clinical disease and histological damage to the colonic mucosa were significantly less severe in GC-C(-/-) mice and moderately reduced in Gn(-/-) animals. Relative to wild-type controls, GC-C(-/-) and Gn(-/-) mice had reduced apoptosis and increased proliferation of intestinal epithelial cells during DSS colitis. Basal and DSS-induced production of resistin-like molecule β (RELMβ) was substantially diminished in GC-C(-/-) mice. RELMβ is thought to stimulate cytokine production in macrophages in this disease model and, consistent with this, TNF-α and IFN-γ production was minimal in GC-C(-/-) animals. RELMβ and cytokine levels were similar to wild-type in Gn(-/-) mice, however. Colonic instillation of recombinant RELMβ by enema into GC-C(-/-) mice restores sensitivity to DSS-mediated mucosal injury. These findings demonstrate a novel role for GC-C signaling in facilitating mucosal wounding and inflammation, and further suggest that this may be mediated, in part, through control of RELMβ production.
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Affiliation(s)
- Kris A Steinbrecher
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA.
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Wurbel MA, McIntire MG, Dwyer P, Fiebiger E. CCL25/CCR9 interactions regulate large intestinal inflammation in a murine model of acute colitis. PLoS One 2011; 6:e16442. [PMID: 21283540 PMCID: PMC3026821 DOI: 10.1371/journal.pone.0016442] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2010] [Accepted: 12/17/2010] [Indexed: 12/13/2022] Open
Abstract
Background & Aims CCL25/CCR9 is a non-promiscuous chemokine/receptor pair and a key regulator of leukocyte migration to the small intestine. We investigated here whether CCL25/CCR9 interactions also play a role in the regulation of inflammatory responses in the large intestine. Methods Acute inflammation and recovery in wild-type (WT) and CCR9−/− mice was studied in a model of dextran sulfate sodium (DSS)-induced colitis. Distribution studies and phenotypic characterization of dendritic cell subsets and macrophage were performed by flow cytometry. Inflammatory bowel disease (IBD) scores were assessed and expression of inflammatory cytokines was studied at the mRNA and the protein level. Results CCL25 and CCR9 are both expressed in the large intestine and are upregulated during DSS colitis. CCR9−/− mice are more susceptible to DSS colitis than WT littermate controls as shown by higher mortality, increased IBD score and delayed recovery. During recovery, the CCR9−/− colonic mucosa is characterized by the accumulation of activated macrophages and elevated levels of Th1/Th17 inflammatory cytokines. Activated plasmacytoid dendritic cells (DCs) accumulate in mesenteric lymph nodes (MLNs) of CCR9−/− animals, altering the local ratio of DC subsets. Upon re-stimulation, T cells isolated from these MLNs secrete significantly higher levels of TNFα, IFNγ, IL2, IL-6 and IL-17A while down modulating IL-10 production. Conclusions Our results demonstrate that CCL25/CCR9 interactions regulate inflammatory immune responses in the large intestinal mucosa by balancing different subsets of dendritic cells. These findings have important implications for the use of CCR9-inhibitors in therapy of human IBD as they indicate a potential risk for patients with large intestinal inflammation.
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Affiliation(s)
- Marc-Andre Wurbel
- Division of Gastroenterology and Nutrition, Children's Hospital Boston, and Department of Pediatrics, Harvard Medical School, Boston, Massachusetts, United States of America.
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López-Posadas R, Requena P, González R, Suárez MD, Zarzuelo A, Sánchez de Medina F, Martínez-Augustin O. Bovine glycomacropeptide has intestinal antiinflammatory effects in rats with dextran sulfate-induced colitis. J Nutr 2010; 140:2014-9. [PMID: 20881082 DOI: 10.3945/jn.109.118448] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Milk κ-casein-derived bovine glycomacropeptide (GMP) has immunomodulatory and bacterial toxin-binding effects, and it has been shown to exert intestinal antiinflammatory activity in the trinitrobenzenesulfonic acid-induced model of colitis. However, its mechanism of action is not well characterized, and it is not known whether GMP is effective in other experimental models. The intestinal antiinflammatory activity of GMP was assessed in the dextran sulfate sodium (DSS)-induced model of rat colitis. DSS was applied at a starting concentration of 5% (wt:v) in drinking water and adjusted when the disease activity index (DAI) increased substantially for 10 d. There were 3 experimental groups: control (no inflammation), DSS, and GMP (GMP-treated rats with DSS-induced colitis). GMP pretreatment (500 mg · kg(-1) · d(-1), starting 2 d before DSS treatment) reduced the DAI by 60% and lowered the colonic damage score by 44% (P < 0.05). GMP fully normalized the colonic expression of interleukin (IL) 1β, IL17, IL23, IL6, transforming growth factor β, IL10, and Foxp3 as assessed by quantitative RT-PCR. The production of interferon-γ by mesenteric lymph node cells ex vivo was also normalized by GMP treatment. In contrast, GMP did not change colonic thickening, myeloperoxidase, cyclooxygenase 2, or alkaline phosphatase. Histology analysis showed better preservation of the epithelium and attenuated infiltration and submucosal thickening in rats treated with GMP. We conclude that GMP exerts intestinal antiinflammatory activity in this model, which may be primarily related to actions on Th1 and Th17 lymphocytes and perhaps macrophages.
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Affiliation(s)
- Rocío López-Posadas
- Department of Pharmacology, School of Pharmacy, University of Granada, Granada 18071, Spain
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Ng SC, Kamm MA, Stagg AJ, Knight SC. Intestinal dendritic cells: their role in bacterial recognition, lymphocyte homing, and intestinal inflammation. Inflamm Bowel Dis 2010; 16:1787-807. [PMID: 20222140 DOI: 10.1002/ibd.21247] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Dendritic cells (DCs) play a key role in discriminating between commensal microorganisms and potentially harmful pathogens and in maintaining the balance between tolerance and active immunity. The regulatory role of DC is of particular importance in the gut where the immune system lies in intimate contact with the highly antigenic external environment. Intestinal DC constantly survey the luminal microenvironment. They act as sentinels, acquiring antigens in peripheral tissues before migrating to secondary lymphoid organs to activate naive T cells. They are also sensors, responding to a spectrum of environmental cues by extensive differentiation or maturation. Recent studies have begun to elucidate mechanisms for functional specializations of DC in the intestine that may include the involvement of retinoic acid and transforming growth factor-β. Specialized CD103(+) intestinal DC can promote the differentiation of Foxp3(+) regulatory T cells via a retinoic acid-dependent process. Different DC outcomes are, in part, influenced by their exposure to microbial stimuli. Evidence is also emerging of the close interaction between bacteria, epithelial cells, and DC in the maintenance of intestinal immune homeostasis. Here we review recent advances of functionally specialized intestinal DC and their mechanisms of antigen uptake and recognition. We also discuss the interaction of DC with intestinal microbiota and their ability to orchestrate protective immunity and immune tolerance in the host. Lastly, we describe how DC functions are altered in intestinal inflammation and their emerging potential as a therapeutic target in inflammatory bowel disease.
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Affiliation(s)
- S C Ng
- Antigen Presentation Research Group, Faculty of Medicine, Imperial College London, Northwick Park and St Mark's Campus, Harrow, UK
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Kostadinova FI, Baba T, Ishida Y, Kondo T, Popivanova BK, Mukaida N. Crucial involvement of the CX3CR1-CX3CL1 axis in dextran sulfate sodium-mediated acute colitis in mice. J Leukoc Biol 2010; 88:133-43. [PMID: 20335311 DOI: 10.1189/jlb.1109768] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Ingestion of DSS solution can induce in rodents acute colitis with a massive infiltration of neutrophils and macropahges, mimicking pathological changes observed in the acute phase of UC patients. Concomitantly, DSS ingestion enhanced the expression of a potent macrophage-tropic chemokine, CX3CL1/fractalkine, and its receptor, CX3CR1, in the colon. WT but not CX3CR1-deficient mice exhibited marked body weight loss and shortening of the colon after DSS ingestion. Moreover, inflammatory cell infiltration was attenuated in CX3CR1-deficient mice together with reduced destruction of glandular architecture compared with WT mice. DSS ingestion enhanced intracolonic iNOS expression by macrophages and nitrotyrosine generation in WT mice, but iNOS expression and nitrotyrosine generation were attenuated in CX3CR1-deficient mice. The analysis on bone marrow chimeric mice revealed that bone marrow-derived but not non-bone marrow-derived CX3CR1-expressing cells were a major source of iNOS. These observations would indicate that the CX3CL1-CX3CR1 axis can regulate the expression of iNOS, a crucial mediator of DSS-induced colitis. Thus, targeting the CX3CL1-CX3CR1 axis may be effective for the treatment of IBDs such as UC.
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Affiliation(s)
- Feodora I Kostadinova
- Division of Molecular Bioregulation, Cancer Research Institute, Kanazawa University, Kanazawa, Japan
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Erickson KL, Hubbard NE. Assessing mucosal immunity with new concepts and innovative, time-honored strategies. Nutr Rev 2010; 67 Suppl 2:S172-82. [PMID: 19906221 DOI: 10.1111/j.1753-4887.2009.00238.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
A healthy mucosal immune system prevents numerous diseases whether they are caused by pathogens or faulty tolerance to non-pathogenic antigens. Some methods for assessing immune responses have not changed for decades but have been applied in conjunction with new strategies. New methods have been developed recently that improve on existing mouse models and allow for assessment of cellular and molecular pathways that are involved in mucosal immune responses. Reviewed here are components of the mucosal immune system with attention paid to the gut-associated lymphoid tissue and some of the new methods for assessing immune responses.
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Affiliation(s)
- Kent L Erickson
- Department of Cell Biology and Human Anatomy, University of California, School of Medicine, Davis, California, USA.
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Bernasconi E, Favre L, Maillard MH, Bachmann D, Pythoud C, Bouzourene H, Croze E, Velichko S, Parkinson J, Michetti P, Velin D. Granulocyte-macrophage colony-stimulating factor elicits bone marrow-derived cells that promote efficient colonic mucosal healing. Inflamm Bowel Dis 2010; 16:428-41. [PMID: 19639560 DOI: 10.1002/ibd.21072] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Granulocyte-macrophage colony-stimulating factor (GM-CSF) therapy is effective in treating some Crohn's disease (CD) patients and protects mice from colitis induced by dextran sulfate sodium (DSS) administration. However, its mechanisms of action remain elusive. We hypothesized that GM-CSF affects intestinal mucosal repair. METHODS DSS colitic mice were treated with daily pegylated GM-CSF or saline and clinical, histological, and inflammatory parameters were kinetically evaluated. Further, the role of bone marrow-derived cells in the impact of GM-CSF therapy on DSS colitis was addressed using cell transfers. RESULTS GM-CSF therapy reduced clinical signs of colitis and the release of inflammatory mediators. GM-CSF therapy improved mucosal repair, with faster ulcer reepithelialization, accelerated hyperproliferative response of epithelial cells in ulcer-adjacent crypts, and lower colonoscopic ulceration scores in GM-CSF-administered mice relative to untreated mice. We observed that GM-CSF-induced promotion of mucosal repair is timely associated with a reduction in neutrophil numbers and increased accumulation of CD11b(+) monocytic cells in colon tissues. Importantly, transfer of splenic GM-CSF-induced CD11b(+) myeloid cells into DSS-exposed mice improved colitis, and lethally irradiated GM-CSF receptor-deficient mice reconstituted with wildtype bone marrow cells were protected from DSS-induced colitis upon GM-CSF therapy. Lastly, GM-CSF-induced CD11b(+) myeloid cells were shown to promote in vitro wound repair. CONCLUSIONS Our study shows that GM-CSF-dependent stimulation of bone marrow-derived cells during DSS-induced colitis accelerates colonic tissue repair. These data provide a putative mechanism for the observed beneficial effects of GM-CSF therapy in Crohn's disease.
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Affiliation(s)
- Eric Bernasconi
- Division of Gastroenterology and Hepatology, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Switzerland
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van Lierop PPE, de Haar C, Lindenbergh-Kortleve DJ, Simons-Oosterhuis Y, van Rijt LS, Lambrecht BN, Escher JC, Samsom JN, Nieuwenhuis EES. T-cell regulation of neutrophil infiltrate at the early stages of a murine colitis model. Inflamm Bowel Dis 2010; 16:442-51. [PMID: 19714763 DOI: 10.1002/ibd.21073] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
BACKGROUND T-cells are a main target for antiinflammatory drugs in inflammatory bowel disease. As the innate immune system is also implicated in the pathogenesis of these diseases, T-cell suppressors may not only inhibit T-cell-dependent production of proinflammatory mediators but also affect innate immune cell function. Specifically, these drugs may impair innate immune cell recruitment and activation through inhibition of T-cells or act independent of T-cell modulation. We explored the extent of immune modulation by the T-cell inhibitor tacrolimus in a murine colitis model. METHODS We assessed the effects of tacrolimus on trinitro-benzene sulphonic acid (TNBS) colitis in wildtype and Rag2-deficient mice. The severity of colitis was assessed by means of histological scores and weight loss. We further characterized the inflammation using immunohistochemistry and by analysis of isolated intestinal leukocytes at various stages of disease. RESULTS Tacrolimus-treated wildtype mice were less sensitive to colitis and had fewer activated T-cells. Inhibition of T-cell function was associated with strongly diminished recruitment of infiltrating neutrophils in the colon at the early stages of this model. In agreement, immunohistochemistry demonstrated that tacrolimus inhibited production of the neutrophil chemoattractants CXCL1 and CXCL2. Rag2-deficient mice displayed an enhanced baseline level of lamina propria neutrophils that was moderately increased in TNBS colitis and remained unaffected by tacrolimus. CONCLUSIONS Both the innate and the adaptive mucosal immune system contribute to TNBS colitis. Tacrolimus suppresses colitis directly through inhibition of T-cell activation and by suppression of T-cell-mediated recruitment of neutrophils.
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Affiliation(s)
- Pieter P E van Lierop
- Department of Pediatrics, Division of Gastroenterology & Nutrition, Erasmus MC, Sophia Children's Hospital, Rotterdam, The Netherlands
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Abstract
Dendritic cells (DCs) are specialized antigen-presenting cells that orchestrate innate and adaptive immune responses. The intestinal mucosa contains numerous DCs that are highly specialized in function. Mucosal DCs display a unique response to toll-like receptor ligands, are capable of driving immunoglobulin isotype switching to IgA, can imprint gut-homing receptors on T and B cells, and drive either T regulatory or Th17 cells depending on the analyzed subtype. These functions are partly cell autonomous and partly conferred by the local microenvironment. In this review, we will summarize the different DC subtypes present in the intestine and in the gut-associated lymphoid tissue (GALT), the unique characteristics of these subtypes, and how the local microenvironment can shape DC function.
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Affiliation(s)
- Maria Rescigno
- Department of Experimental Oncology, European Institute of Oncology, Milan, Italy
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Rescigno M, Iliev ID. Interleukin-23: linking mesenteric lymph node dendritic cells with Th1 immunity in Crohn's disease. Gastroenterology 2009; 137:1566-70. [PMID: 19789081 DOI: 10.1053/j.gastro.2009.09.029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Rescigno M, Di Sabatino A. Dendritic cells in intestinal homeostasis and disease. J Clin Invest 2009; 119:2441-50. [PMID: 19729841 DOI: 10.1172/jci39134] [Citation(s) in RCA: 230] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
DCs are specialized APCs that orchestrate innate and adaptive immune responses. The intestinal mucosa contains numerous DCs, which induce either protective immunity to infectious agents or tolerance to innocuous antigens, including food and commensal bacteria. Several subsets of mucosal DCs have been described that display unique functions, dictated in part by the local microenvironment. In this review, we summarize the distinct subtypes of DCs and their distribution in the gut; examine how DC dysfunction contributes to intestinal disease development, including inflammatory bowel disease and celiac disease; and discuss manipulation of DCs for therapy.
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Affiliation(s)
- Maria Rescigno
- Department of Experimental Oncology, European Institute of Oncology, Milan, Italy.
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