1
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Marafini I, Monteleone I, Laudisi F, Monteleone G. Aryl Hydrocarbon Receptor Signalling in the Control of Gut Inflammation. Int J Mol Sci 2024; 25:4527. [PMID: 38674118 PMCID: PMC11050475 DOI: 10.3390/ijms25084527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Revised: 04/11/2024] [Accepted: 04/17/2024] [Indexed: 04/28/2024] Open
Abstract
Aryl hydrocarbon receptor (AHR), a transcription factor activated by many natural and synthetic ligands, represents an important mediator of the interplay between the environment and the host's immune responses. In a healthy gut, AHR activation promotes tolerogenic signals, which help maintain mucosal homeostasis. AHR expression is defective in the inflamed gut of patients with inflammatory bowel diseases (IBD), where decreased AHR signaling is supposed to contribute to amplifying the gut tissue's destructive immune-inflammatory responses. We here review the evidence supporting the role of AHR in controlling the "physiological" intestinal inflammation and summarize the data about the therapeutic effects of AHR activators, both in preclinical mouse models of colitis and in patients with IBD.
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Affiliation(s)
- Irene Marafini
- Gastroenterology Unit, Policlinico Universitario Tor Vergata, 00133 Rome, Italy;
| | - Ivan Monteleone
- Department of Biomedicine and Prevention, University of “Tor Vergata”, 00133 Rome, Italy;
| | - Federica Laudisi
- Department of Systems Medicine, University of “Tor Vergata”, 00133 Rome, Italy;
| | - Giovanni Monteleone
- Gastroenterology Unit, Policlinico Universitario Tor Vergata, 00133 Rome, Italy;
- Department of Systems Medicine, University of “Tor Vergata”, 00133 Rome, Italy;
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2
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Hernandez JE, Llorente C, Ma S, Miyamoto KT, Sinha S, Steele S, Xiao Z, Lai CJ, Zuniga EI, Ghosh P, Schnabl B, Huang WJM. The arginine methyltransferase PRMT5 promotes mucosal defense in the intestine. Life Sci Alliance 2023; 6:e202302026. [PMID: 37666668 PMCID: PMC10477432 DOI: 10.26508/lsa.202302026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 08/27/2023] [Accepted: 08/28/2023] [Indexed: 09/06/2023] Open
Abstract
PRMT5 is a type II arginine methyltransferase abundantly expressed in the colonic epithelium. It is up-regulated in inflammatory bowel disease and colorectal cancer. However, its role in mucosal defense against enteric infection has not been studied. Here, we report that Prmt5 in the murine colon is up-regulated in response to Citrobacter rodentium infection. Pathogen clearance in mice with haploinsufficient expression of Prmt5 is significantly delayed compared with wildtype littermate controls. Transcriptomic analyses further reveal that PRMT5 regulates the expression of canonical crypt goblet cell genes involved in mucus production, assembly, and anti-microbial responses via methyltransferase activity-dependent and -independent mechanisms. Together, these findings uncover PRMT5 as a novel regulator of mucosal defense and a potential therapeutic target for treating intestinal diseases.
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Affiliation(s)
- Juan E Hernandez
- https://ror.org/0168r3w48 Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA, USA
| | - Cristina Llorente
- https://ror.org/0168r3w48 Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - Shengyun Ma
- https://ror.org/0168r3w48 Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA, USA
| | - Kiana T Miyamoto
- https://ror.org/0168r3w48 Division of Biological Sciences, University of California San Diego, La Jolla, CA, USA
| | - Saptarshi Sinha
- https://ror.org/0168r3w48 Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA, USA
| | - Scarlet Steele
- https://ror.org/0168r3w48 Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA, USA
| | - Zihui Xiao
- https://ror.org/0168r3w48 Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA, USA
| | - Ching-Jung Lai
- https://ror.org/0168r3w48 Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA, USA
| | - Elina I Zuniga
- https://ror.org/0168r3w48 Division of Biological Sciences, University of California San Diego, La Jolla, CA, USA
| | - Pradipta Ghosh
- https://ror.org/0168r3w48 Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA, USA
- https://ror.org/0168r3w48 Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - Bernd Schnabl
- https://ror.org/0168r3w48 Department of Medicine, University of California San Diego, La Jolla, CA, USA
- Department of Medicine, Veterans Affairs San Diego Healthcare System, San Diego, CA, USA
| | - Wendy Jia Men Huang
- https://ror.org/0168r3w48 Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA, USA
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3
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Malik A, Sharma D, Aguirre-Gamboa R, McGrath S, Zabala S, Weber C, Jabri B. Epithelial IFNγ signalling and compartmentalized antigen presentation orchestrate gut immunity. Nature 2023; 623:1044-1052. [PMID: 37993709 DOI: 10.1038/s41586-023-06721-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 10/06/2023] [Indexed: 11/24/2023]
Abstract
All nucleated cells express major histocompatibility complex I and interferon-γ (IFNγ) receptor1, but an epithelial cell-specific function of IFNγ signalling or antigen presentation by means of major histocompatibility complex I has not been explored. We show here that on sensing IFNγ, colonic epithelial cells productively present pathogen and self-derived antigens to cognate intra-epithelial T cells, which are critically located at the epithelial barrier. Antigen presentation by the epithelial cells confers extracellular ATPase expression in cognate intra-epithelial T cells, which limits the accumulation of extracellular adenosine triphosphate and consequent activation of the NLRP3 inflammasome in tissue macrophages. By contrast, antigen presentation by the tissue macrophages alongside inflammasome-associated interleukin-1α and interleukin-1β production promotes a pathogenic transformation of CD4+ T cells into granulocyte-macrophage colony-stimulating-factor (GM-CSF)-producing T cells in vivo, which promotes colitis and colorectal cancer. Taken together, our study unravels critical checkpoints requiring IFNγ sensing and antigen presentation by epithelial cells that control the development of pathogenic CD4+ T cell responses in vivo.
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Affiliation(s)
- Ankit Malik
- Department of Medicine, Committee on Immunology, Department of Pediatrics, Department of Pathology, University of Chicago, Chicago, IL, USA.
| | - Deepika Sharma
- Department of Medicine, Committee on Immunology, Department of Pediatrics, Department of Pathology, University of Chicago, Chicago, IL, USA
| | - Raúl Aguirre-Gamboa
- Department of Medicine, Committee on Immunology, Department of Pediatrics, Department of Pathology, University of Chicago, Chicago, IL, USA
| | - Shaina McGrath
- Department of Medicine, Committee on Immunology, Department of Pediatrics, Department of Pathology, University of Chicago, Chicago, IL, USA
| | - Sarah Zabala
- Department of Medicine, Committee on Immunology, Department of Pediatrics, Department of Pathology, University of Chicago, Chicago, IL, USA
| | - Christopher Weber
- Department of Medicine, Committee on Immunology, Department of Pediatrics, Department of Pathology, University of Chicago, Chicago, IL, USA
- Department of Pathology, Department of Medicine, University of Chicago, Chicago, IL, USA
| | - Bana Jabri
- Department of Medicine, Committee on Immunology, Department of Pediatrics, Department of Pathology, University of Chicago, Chicago, IL, USA.
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4
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Shin AE, Tesfagiorgis Y, Larsen F, Derouet M, Zeng PYF, Good HJ, Zhang L, Rubinstein MR, Han YW, Kerfoot SM, Nichols AC, Hayakawa Y, Howlett CJ, Wang TC, Asfaha S. F4/80 +Ly6C high Macrophages Lead to Cell Plasticity and Cancer Initiation in Colitis. Gastroenterology 2023; 164:593-609.e13. [PMID: 36634827 PMCID: PMC10038892 DOI: 10.1053/j.gastro.2023.01.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2022] [Revised: 12/15/2022] [Accepted: 01/03/2023] [Indexed: 01/14/2023]
Abstract
BACKGROUND & AIMS Colorectal cancer is a leading cause of cancer death, and a major risk factor is chronic inflammation. Despite the link between colitis and cancer, the mechanism by which inflammation leads to colorectal cancer is not well understood. METHODS To investigate whether different forms of inflammation pose the same risk of cancer, we compared several murine models of colitis (dextran sodium sulfate [DSS], 2,4,6-trinitrobenzene sulfonic acid, 4-ethoxylmethylene-2-phenyloxazol-5-one, Citrobacter rodentium, Fusobacterium nucleatum, and doxorubicin) with respect to their ability to lead to colonic tumorigenesis. We attempted to correlate the severity of colitis and inflammatory profile with the risk of tumorigenesis in both azoxymethane-dependent and Dclk1/APCfl/fl murine models of colitis-associated cancer. RESULTS DSS colitis reproducibly led to colonic tumors in both mouse models of colitis-associated cancer. In contrast, all other forms of colitis did not lead to cancer. When compared with the colitis not associated with tumorigenesis, DSS colitis was characterized by significantly increased CD11b+F4/80+Ly6Chigh macrophages and CD11b+Ly6G+ neutrophils. Interestingly, depletion of the CD11b+F4/80+Ly6Chigh macrophages inhibited tumorigenesis, whereas depletion of CD11b+Ly6G+ neutrophils had no effect on tumorigenesis. Furthermore, the macrophage-derived cytokines interleukin-1β, tumor necrosis factor-α, and interleukin-6 were significantly increased in DSS colitis and promoted stemness of Dclk1+ tuft cells that serve as the cellular origin of cancer. CONCLUSIONS We have identified CD11b+F4/80+Ly6Chigh macrophages as key mediators of cancer initiation in colitis-associated cancer. Development of new therapies that target these cells may provide an effective preventative strategy for colitis-associated cancer.
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Affiliation(s)
- Alice E Shin
- Department of Pathology and Laboratory Medicine, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada; Department of Medicine, Western University, London, Ontario, Canada
| | - Yodit Tesfagiorgis
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Frederikke Larsen
- Department of Pathology and Laboratory Medicine, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada; Department of Medicine, Western University, London, Ontario, Canada
| | - Mathieu Derouet
- Department of Pathology and Laboratory Medicine, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada; Department of Medicine, Western University, London, Ontario, Canada
| | - Peter Y F Zeng
- Department of Pathology and Laboratory Medicine, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada; Department of Otolaryngology and Head and Neck Surgery, Western University, London, Ontario, Canada
| | - Hayley J Good
- Department of Pathology and Laboratory Medicine, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada; Department of Medicine, Western University, London, Ontario, Canada
| | - Liyue Zhang
- Department of Medicine, Western University, London, Ontario, Canada
| | - Mara R Rubinstein
- Section of Oral, Diagnostic and Rehabilitation Sciences, College of Dental Medicine, Columbia University Irving Medical Center, New York, New York
| | - Yiping W Han
- Section of Oral, Diagnostic and Rehabilitation Sciences, College of Dental Medicine, Columbia University Irving Medical Center, New York, New York; Departments of Microbiology & Immunology and Medicine (Medical Sciences), Columbia University Irving Medical Center, New York, New York
| | - Steven M Kerfoot
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Anthony C Nichols
- Department of Otolaryngology and Head and Neck Surgery, Western University, London, Ontario, Canada
| | - Yoku Hayakawa
- Department of Gastroenterology, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - Christopher J Howlett
- Department of Pathology and Laboratory Medicine, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada
| | - Timothy C Wang
- Department of Medicine, Columbia University Irving Medical Center, New York, New York
| | - Samuel Asfaha
- Department of Pathology and Laboratory Medicine, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada; Department of Medicine, Western University, London, Ontario, Canada.
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5
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Kautzman AM, Mobulakani JMF, Marrero Cofino G, Quenum AJI, Cayarga AA, Asselin C, Fortier LC, Ilangumaran S, Menendez A, Ramanathan S. Interleukin 15 in murine models of colitis. Anat Rec (Hoboken) 2022; 306:1111-1130. [PMID: 35899872 DOI: 10.1002/ar.25044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 06/28/2022] [Accepted: 07/05/2022] [Indexed: 11/09/2022]
Abstract
Inflammatory bowel diseases (IBDs) are characterized by abnormal, non-antigen specific chronic inflammation of unknown etiology. Genome-wide association studies show that many IBD genetic susceptibility loci map to immune function genes and compelling evidence indicate that environmental factors play a critical role in IBD pathogenesis. Clinical and experimental evidence implicate the pro-inflammatory cytokine IL-15 in the pathogenesis of IBD. IL-15 and IL-15α expression is increased in the inflamed mucosa of IBD patients. IL-15 contributes to the maintenance of different cell subsets in the intestinal mucosa. However, very few studies have addressed the role of IL-15 in pre-clinical models of colitis. In this study, we use three well-characterized models of experimental colitis to determine the contribution of IL-15 to pathological intestinal inflammation.
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Affiliation(s)
- Alicia Molina Kautzman
- Department of Immunology and Cell Biology, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | | | - Gisela Marrero Cofino
- Department of Microbiology and Infectious Diseases, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | | | - Anny Armas Cayarga
- Department of Immunology and Cell Biology, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Claude Asselin
- Department of Immunology and Cell Biology, Université de Sherbrooke, Sherbrooke, Quebec, Canada.,CRCHUS, Sherbrooke, Quebec, Canada
| | - Louis-Charles Fortier
- Department of Microbiology and Infectious Diseases, Université de Sherbrooke, Sherbrooke, Quebec, Canada.,CRCHUS, Sherbrooke, Quebec, Canada
| | - Subburaj Ilangumaran
- Department of Immunology and Cell Biology, Université de Sherbrooke, Sherbrooke, Quebec, Canada.,CRCHUS, Sherbrooke, Quebec, Canada
| | - Alfredo Menendez
- Department of Microbiology and Infectious Diseases, Université de Sherbrooke, Sherbrooke, Quebec, Canada.,CRCHUS, Sherbrooke, Quebec, Canada
| | - Sheela Ramanathan
- Department of Immunology and Cell Biology, Université de Sherbrooke, Sherbrooke, Quebec, Canada.,CRCHUS, Sherbrooke, Quebec, Canada
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6
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Xue Y, Xu YF, Zhang B, Huang HB, Pan TX, Li JY, Tang Y, Shi CW, Wang N, Yang GL, Wang CF. Trichinella spiralis infection ameliorates the severity of Citrobacter rodentium-induced experimental colitis in mice. Exp Parasitol 2022; 238:108264. [PMID: 35523284 DOI: 10.1016/j.exppara.2022.108264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 04/06/2022] [Accepted: 04/25/2022] [Indexed: 11/23/2022]
Abstract
Trichinellosis is a food-borne zoonotic parasitic disease that causes serious harm to human health and the pig breeding industry. However, there are reports that Trichinella spiralis (T. spiralis) infection can treat autoimmune diseases, including enteritis and experimental autoimmune encephalitis (EAE). However, research on the mechanism of T. spiralis infection in infectious enteritis has not been fully elucidated. Therefore, this experiment used Citrobacter rodentium (C. rodentium) to induce colitis in mouse models and explored its underlying mechanisms. In this experiment, a total of 72 C57BL/6 mice were randomly divided into four groups. Experimental mice in the TS and TS + CR groups were orally inoculated with individual T. spiralis larvae. At 21 days postinfection (dpi) with T. spiralis, experimental animals in the CR and TS + CR groups were inoculated by orogastric gavage with C. rodentium. The control group received PBS only. The results indicated that the weight loss and macroscopic and microscopic colon damage of mice in the TS + CR group were significantly decreased compared with those observed in the CR group. The results of flow cytometry showed that the expression levels of IL-4, IL-10 and CD4+CD25+Foxp3+ Tregs were increased (P < 0.05), while the expression levels of IFN-γ, IL-12 and IL-17 were decreased in the spleens and MLNs of the TS + CR experimental mice compared with the colitis model mice. ELISA results revealed that the TS + CR group not only elicited a strong IgG1 response (P < 0.01) but also a low level of IgG2a response (P < 0.05) relative to the CR group. The above results demonstrated that prior exposure of mice to T. spiralis infection ameliorated the severity of C. rodentium-induced infectious colitis.
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Affiliation(s)
- Ying Xue
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China; Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China; Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Yun-Fei Xu
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China; Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China; Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Bo Zhang
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China; Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China; Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Hai-Bin Huang
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China; Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China; Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Tian-Xu Pan
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China; Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China; Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Jun-Yi Li
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China; Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China; Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Yue Tang
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China; Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China; Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Chun-Wei Shi
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China; Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China; Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Nan Wang
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China; Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China; Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Gui-Lian Yang
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China; Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China; Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China.
| | - Chun-Feng Wang
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China; Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China; Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China.
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7
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Zhang S, Zhong R, Tang S, Han H, Chen L, Zhang H. Baicalin Alleviates Short-Term Lincomycin-Induced Intestinal and Liver Injury and Inflammation in Infant Mice. Int J Mol Sci 2022; 23:ijms23116072. [PMID: 35682750 PMCID: PMC9181170 DOI: 10.3390/ijms23116072] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 05/22/2022] [Accepted: 05/26/2022] [Indexed: 11/24/2022] Open
Abstract
The adverse effects of short-term megadose of antibiotics exposure on the gastrointestinal and liver tissue reactions in young children have been reported. Antibiotic-induced intestinal and liver reactions are usually unpredictable and present a poorly understood pathogenesis. It is, therefore, necessary to develop strategies for reducing the adverse effects of antibiotics. Studies on the harm and rescue measures of antibiotics from the perspective of the gut–liver system are lacking. Here, we demonstrate that lincomycin exposure reduced body weight, disrupted the composition of gut microbiota and intestinal morphology, triggered immune-mediated injury and inflammation, caused liver dysfunction, and affected lipid metabolism. However, baicalin administration attenuated the lincomycin-induced changes. Transcriptome analysis showed that baicalin improved immunity in mice, as evidenced by the decreased levels of intestinal inflammatory cytokines and expression of genes that regulate Th1, Th2, and Th17 cell differentiation, and inhibited mucin type O-glycan biosynthesis pathways. In addition, baicalin improved liver function by upregulating the expression of genes involved in bile acid secretion and lipid degradation, and downregulating genes involved in lipid synthesis in lincomycin-treated mice. Bile acids can regulate intestinal immunity and strengthen hepatoenteric circulation. In addition, baicalin also improved anti-inflammatory bacteria abundance (Blautia and Coprobacillus) and reduced pathogenic bacteria abundance (Proteobacteria, Klebsiella, and Citrobacter) in lincomycin-treated mice. Thus, baicalin can ameliorate antibiotic-induced injury and its associated complications such as liver disease.
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Affiliation(s)
| | | | | | | | - Liang Chen
- Correspondence: (L.C.); (H.Z.); Tel.: +86-10-6281-8910 (L.C.); Fax: +86-10-6281-6013 (H.Z.)
| | - Hongfu Zhang
- Correspondence: (L.C.); (H.Z.); Tel.: +86-10-6281-8910 (L.C.); Fax: +86-10-6281-6013 (H.Z.)
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8
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Neutral ceramidase-dependent regulation of macrophage metabolism directs intestinal immune homeostasis and controls enteric infection. Cell Rep 2022; 38:110560. [PMID: 35354041 DOI: 10.1016/j.celrep.2022.110560] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 12/21/2021] [Accepted: 03/01/2022] [Indexed: 12/12/2022] Open
Abstract
It is not clear how the complex interactions between diet and intestinal immune cells protect the gut from infection. Neutral ceramidase (NcDase) plays a critical role in digesting dietary sphingolipids. We find that NcDase is an essential factor that controls intestinal immune cell dynamics. Mice lacking NcDase have reduced cluster of differentiation (CD) 8αβ+ T cells and interferon (IFN)-γ+ T cells and increased macrophages in the intestine and fail to clear bacteria after Citrobacter rodentium infection. Mechanistically, cellular NcDase or extracellular vesicle (EV)-related NcDase generates sphingosine, which promotes macrophage-driven Th1 immunity. Loss of NcDase influences sphingosine-controlled glycolytic metabolism in macrophages, which regulates the bactericidal activity of macrophages. Importantly, administration of dietary sphingomyelin and genetic deletion or pharmacological inhibition of SphK1 can protect against C. rodentium infection. Our findings demonstrate that sphingosine profoundly alters macrophage glycolytic metabolism, leading to intestinal macrophage activation and T cell polarization, which prevent pathogen colonization of the gut.
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9
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Katkar GD, Sayed IM, Anandachar MS, Castillo V, Vidales E, Toobian D, Usmani F, Sawires JR, Leriche G, Yang J, Sandborn WJ, Das S, Sahoo D, Ghosh P. Artificial intelligence-rationalized balanced PPARα/γ dual agonism resets dysregulated macrophage processes in inflammatory bowel disease. Commun Biol 2022; 5:231. [PMID: 35288651 PMCID: PMC8921270 DOI: 10.1038/s42003-022-03168-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Accepted: 02/07/2022] [Indexed: 12/12/2022] Open
Abstract
A computational platform, Boolean network explorer (BoNE), has recently been developed to infuse AI-enhanced precision into drug discovery; it enables invariant Boolean Implication Networks of disease maps for prioritizing high-value targets. Here we used BoNE to query an Inflammatory Bowel Disease (IBD)-map and prioritize a therapeutic strategy that involves dual agonism of two nuclear receptors, PPARα/γ. Balanced agonism of PPARα/γ was predicted to modulate macrophage processes, ameliorate colitis, 'reset' the gene expression network from disease to health. Predictions were validated using a balanced and potent PPARα/γ-dual-agonist (PAR5359) in Citrobacter rodentium- and DSS-induced murine colitis models. Using inhibitors and agonists, we show that balanced-dual agonism promotes bacterial clearance efficiently than individual agonists, both in vivo and in vitro. PPARα is required and sufficient to induce the pro-inflammatory cytokines and cellular ROS, which are essential for bacterial clearance and immunity, whereas PPARγ-agonism blunts these responses, delays microbial clearance; balanced dual agonism achieved controlled inflammation while protecting the gut barrier and 'reversal' of the transcriptomic network. Furthermore, dual agonism reversed the defective bacterial clearance observed in PBMCs derived from IBD patients. These findings not only deliver a macrophage modulator for use as barrier-protective therapy in IBD, but also highlight the potential of BoNE to rationalize combination therapy.
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Affiliation(s)
- Gajanan D Katkar
- Department of Cellular and Molecular Medicine, University of California San Diego, San Diego, USA
| | - Ibrahim M Sayed
- Department of Pathology, University of California San Diego, San Diego, USA.,Department of Medical Microbiology and Immunology, Faculty of Medicine, Assiut University, Assiut, Egypt
| | | | - Vanessa Castillo
- Department of Cellular and Molecular Medicine, University of California San Diego, San Diego, USA
| | - Eleadah Vidales
- Department of Cellular and Molecular Medicine, University of California San Diego, San Diego, USA
| | - Daniel Toobian
- Department of Cellular and Molecular Medicine, University of California San Diego, San Diego, USA
| | - Fatima Usmani
- Department of Pathology, University of California San Diego, San Diego, USA
| | - Joseph R Sawires
- Department of Chemistry and Biochemistry, University of California San Diego, San Diego, USA
| | - Geoffray Leriche
- Department of Chemistry and Biochemistry, University of California San Diego, San Diego, USA
| | - Jerry Yang
- Department of Chemistry and Biochemistry, University of California San Diego, San Diego, USA
| | - William J Sandborn
- Department of Medicine, University of California San Diego, San Diego, USA.
| | - Soumita Das
- Department of Pathology, University of California San Diego, San Diego, USA.
| | - Debashis Sahoo
- Department of Computer Science and Engineering, Jacob's School of Engineering, University of California San Diego, San Diego, USA. .,Department of Pediatrics, University of California San Diego, San Diego, USA. .,Rebecca and John Moore Comprehensive Cancer Center, University of California San Diego, San Diego, USA.
| | - Pradipta Ghosh
- Department of Cellular and Molecular Medicine, University of California San Diego, San Diego, USA. .,Department of Medicine, University of California San Diego, San Diego, USA. .,Rebecca and John Moore Comprehensive Cancer Center, University of California San Diego, San Diego, USA. .,Veterans Affairs Medical Center, La Jolla, San Diego, USA.
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10
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Cortes C, Desler C, Mazzoli A, Chen JY, Ferreira VP. The role of properdin and Factor H in disease. Adv Immunol 2022; 153:1-90. [PMID: 35469595 DOI: 10.1016/bs.ai.2021.12.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The complement system consists of three pathways (alternative, classical, and lectin) that play a fundamental role in immunity and homeostasis. The multifunctional role of the complement system includes direct lysis of pathogens, tagging pathogens for phagocytosis, promotion of inflammatory responses to control infection, regulation of adaptive cellular immune responses, and removal of apoptotic/dead cells and immune complexes from circulation. A tight regulation of the complement system is essential to avoid unwanted complement-mediated damage to the host. This regulation is ensured by a set of proteins called complement regulatory proteins. Deficiencies or malfunction of these regulatory proteins may lead to pro-thrombotic hematological diseases, renal and ocular diseases, and autoimmune diseases, among others. This review focuses on the importance of two complement regulatory proteins of the alternative pathway, Factor H and properdin, and their role in human diseases with an emphasis on: (a) characterizing the main mechanism of action of Factor H and properdin in regulating the complement system and protecting the host from complement-mediated attack, (b) describing the dysregulation of the alternative pathway as a result of deficiencies, or mutations, in Factor H and properdin, (c) outlining the clinical findings, management and treatment of diseases associated with mutations and deficiencies in Factor H, and (d) defining the unwanted and inadequate functioning of properdin in disease, through a discussion of various experimental research findings utilizing in vitro, mouse and human models.
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Affiliation(s)
- Claudio Cortes
- Department of Foundational Medical Studies, Oakland University William Beaumont School of Medicine, Rochester, MI, United States.
| | - Caroline Desler
- Oakland University William Beaumont School of Medicine, Rochester, MI, United States
| | - Amanda Mazzoli
- Oakland University William Beaumont School of Medicine, Rochester, MI, United States
| | - Jin Y Chen
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, United States
| | - Viviana P Ferreira
- Department of Medical Microbiology and Immunology, University of Toledo College of Medicine and Life Sciences, Toledo, OH, United States.
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11
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Kim E, Paik D, Ramirez RN, Biggs DG, Park Y, Kwon HK, Choi GB, Huh JR. Maternal gut bacteria drive intestinal inflammation in offspring with neurodevelopmental disorders by altering the chromatin landscape of CD4 + T cells. Immunity 2022; 55:145-158.e7. [PMID: 34879222 PMCID: PMC8755621 DOI: 10.1016/j.immuni.2021.11.005] [Citation(s) in RCA: 49] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 08/29/2021] [Accepted: 11/10/2021] [Indexed: 01/13/2023]
Abstract
Children with autism spectrum disorders often display dysregulated immune responses and related gastrointestinal symptoms. However, the underlying mechanisms leading to the development of both phenotypes have not been elucidated. Here, we show that mouse offspring exhibiting autism-like phenotypes due to prenatal exposure to maternal inflammation were more susceptible to developing intestinal inflammation following challenges later in life. In contrast to its prenatal role in neurodevelopmental phenotypes, interleukin-17A (IL-17A) generated immune-primed phenotypes in offspring through changes in the maternal gut microbiota that led to postnatal alterations in the chromatin landscape of naive CD4+ T cells. The transfer of stool samples from pregnant mice with enhanced IL-17A responses into germ-free dams produced immune-primed phenotypes in offspring. Our study provides mechanistic insights into why children exposed to heightened inflammation in the womb might have an increased risk of developing inflammatory diseases in addition to neurodevelopmental disorders.
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Affiliation(s)
- Eunha Kim
- Department of Immunology, Blavatnik Institute, Harvard Medical School, Boston, MA 02115, USA
| | - Donggi Paik
- Department of Immunology, Blavatnik Institute, Harvard Medical School, Boston, MA 02115, USA
| | - Ricardo N Ramirez
- Department of Immunology, Blavatnik Institute, Harvard Medical School, Boston, MA 02115, USA
| | - Delaney G Biggs
- Department of Immunology, Blavatnik Institute, Harvard Medical School, Boston, MA 02115, USA
| | - Youngjun Park
- Department of Immunology, Blavatnik Institute, Harvard Medical School, Boston, MA 02115, USA
| | - Ho-Keun Kwon
- Department of Immunology, Blavatnik Institute, Harvard Medical School, Boston, MA 02115, USA
| | - Gloria B Choi
- The Picower Institute for Learning and Memory, Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
| | - Jun R Huh
- Department of Immunology, Blavatnik Institute, Harvard Medical School, Boston, MA 02115, USA; Evergrande Center for Immunologic Diseases, Harvard Medical School and Brigham and Women's Hospital, Boston, MA 02115, USA.
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12
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Callejas BE, Blyth GAD, Jendzjowsky N, Wang A, Babbar A, Koro K, Wilson RJA, Kelly MM, Cobo ER, McKay DM. Interleukin-4 Programmed Macrophages Suppress Colitis and Do Not Enhance Infectious-Colitis, Inflammation-Associated Colon Cancer or Airway Hypersensitivity. Front Immunol 2021; 12:744738. [PMID: 34691050 PMCID: PMC8527087 DOI: 10.3389/fimmu.2021.744738] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Accepted: 09/15/2021] [Indexed: 01/09/2023] Open
Abstract
The murine interleukin-4 treated macrophage (MIL4) exerts anti-inflammatory and pro-healing effects and has been shown to reduce the severity of chemical-induced colitis. Positing M(IL4) transfer as an anti-inflammatory therapy, the possibility of side-effects must be considered. Consequently, bone marrow-derived M(IL4)s were administered via intraperitoneal injection to mice concomitant with Citrobacter rodentium infection (infections colitis), azoxymethane/dextran sodium sulphate (AOM/DSS) treatment [a model of colorectal cancer (CRC)], or ovalbumin sensitization (airway inflammation). The impact of M(IL4) treatment on C. rodentium infectivity, colon histopathology, tumor number and size and tissue-specific inflammation was examined in these models. The anti-colitic effect of the M(IL4)s were confirmed in the di-nitrobenzene sulphonic acid model of colitis and the lumen-to-blood movement of 4kDa FITC-dextran and bacterial translocation to the spleen and liver was also improved by M(IL4) treatment. Analysis of the other models of disease, that represent comorbidities that can occur in human inflammatory bowel disease (IBD), revealed that M(IL4) treatment did not exaggerate the severity of any of the conditions. Rather, there was reduction in the size (but not number) of polyps in the colon of AOM/DSS-mice and reduced infectivity and inflammation in C. rodentium-infected mice in M(IL4)-treated mice. Thus, while any new therapy can have unforeseen side effects, our data confirm and extend the anti-colitic capacity of murine M(IL4)s and indicate that systemic delivery of one million M(IL4)s did not exaggerate disease in models of colonic or airways inflammation or colonic tumorigenesis.
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Affiliation(s)
- Blanca E Callejas
- Gastrointestinal Research Group, Inflammation Research Network and Host-Parasite Interaction Group, Department of Physiology and Pharmacology, Calvin, Phoebe & Joan Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Graham A D Blyth
- Department of Microbiology, Immunology and Infectious Disease, Cumming School of Medicine, University of Calgary and Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
| | - Nicholas Jendzjowsky
- Department of Physiology and Pharmacology, Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Arthur Wang
- Gastrointestinal Research Group, Inflammation Research Network and Host-Parasite Interaction Group, Department of Physiology and Pharmacology, Calvin, Phoebe & Joan Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Anshu Babbar
- Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
| | - Konstantin Koro
- Department of Pathology and Laboratory Medicine, Calvin, Phoebe & Joan Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Richard J A Wilson
- Department of Physiology and Pharmacology, Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Margaret M Kelly
- Department of Pathology and Laboratory Medicine, Calvin, Phoebe & Joan Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada.,Alberta Children's Hospital Research Institute, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Eduardo R Cobo
- Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
| | - Derek M McKay
- Gastrointestinal Research Group, Inflammation Research Network and Host-Parasite Interaction Group, Department of Physiology and Pharmacology, Calvin, Phoebe & Joan Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
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13
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Xu H, Tamrat NE, Gao J, Xu J, Zhou Y, Zhang S, Chen Z, Shao Y, Ding L, Shen B, Wei Z. Combined Signature of the Urinary Microbiome and Metabolome in Patients With Interstitial Cystitis. Front Cell Infect Microbiol 2021; 11:711746. [PMID: 34527602 PMCID: PMC8436771 DOI: 10.3389/fcimb.2021.711746] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Accepted: 07/29/2021] [Indexed: 02/02/2023] Open
Abstract
Interstitial cystitis (IC) is a clinical syndrome characterized by frequency, urgency, and bladder pain or pelvic pain; however, the underlying pathophysiological mechanisms and diagnostic markers are unknown. In this study, microbiome and metabolome analysis were used to explain the urine signatures of IC patients. Urine samples from 20 IC patients and 22 control groups were analyzed by using 16S rRNA sequence and liquid chromatography coupled with mass spectrometry. Four opportunistic pathogen genera, including Serratia, Brevibacterium, Porphyromonas, and Citrobacter, were significantly upregulated in IC group. The altered metabolite signatures of the metabolome may be related to sphingosine metabolism, amino acid metabolism, and fatty acid biosynthesis. Meanwhile, the associations were observed between different metabolites and microbiomes of IC. The present study suggests that the combined signatures of IC in urine microbiome and metabolome may become its prospective diagnostic markers.
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Affiliation(s)
- Hewei Xu
- Department of Urology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China.,Department of Urology, The Second Clinical Medical College of Nanjing Medical University, Nanjing, China
| | - Nebiyu Elias Tamrat
- Department of Urology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China.,Department of Urology, The Second Clinical Medical College of Nanjing Medical University, Nanjing, China
| | - Jie Gao
- Department of Urology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China.,Department of Urology, The Second Clinical Medical College of Nanjing Medical University, Nanjing, China
| | - Jie Xu
- Department of Urology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China.,Department of Urology, The Second Clinical Medical College of Nanjing Medical University, Nanjing, China
| | - Yiduo Zhou
- Department of Urology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China.,Department of Urology, The Second Clinical Medical College of Nanjing Medical University, Nanjing, China
| | - Sicong Zhang
- Department of Urology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China.,Department of Urology, The Second Clinical Medical College of Nanjing Medical University, Nanjing, China
| | - Zhengsen Chen
- Department of Urology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China.,Department of Urology, The Second Clinical Medical College of Nanjing Medical University, Nanjing, China
| | - Yunpeng Shao
- Department of Urology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China.,Department of Urology, The Second Clinical Medical College of Nanjing Medical University, Nanjing, China
| | - Liucheng Ding
- Department of Urology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China.,Department of Urology, The Second Clinical Medical College of Nanjing Medical University, Nanjing, China
| | - Baixin Shen
- Department of Urology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China.,Department of Urology, The Second Clinical Medical College of Nanjing Medical University, Nanjing, China
| | - Zhongqing Wei
- Department of Urology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China.,Department of Urology, The Second Clinical Medical College of Nanjing Medical University, Nanjing, China
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14
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Shou Y, Koroleva E, Spencer CM, Shein SA, Korchagina AA, Yusoof KA, Parthasarathy R, Leadbetter EA, Akopian AN, Muñoz AR, Tumanov AV. Redefining the Role of Lymphotoxin Beta Receptor in the Maintenance of Lymphoid Organs and Immune Cell Homeostasis in Adulthood. Front Immunol 2021; 12:712632. [PMID: 34335629 PMCID: PMC8320848 DOI: 10.3389/fimmu.2021.712632] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 06/29/2021] [Indexed: 02/04/2023] Open
Abstract
Lymphotoxin beta receptor (LTβR) is a promising therapeutic target in autoimmune and infectious diseases as well as cancer. Mice with genetic inactivation of LTβR display multiple defects in development and organization of lymphoid organs, mucosal immune responses, IgA production and an autoimmune phenotype. As these defects are imprinted in embryogenesis and neonate stages, the impact of LTβR signaling in adulthood remains unclear. Here, to overcome developmental defects, we generated mice with inducible ubiquitous genetic inactivation of LTβR in adult mice (iLTβRΔ/Δ mice) and redefined the role of LTβR signaling in organization of lymphoid organs, immune response to mucosal bacterial pathogen, IgA production and autoimmunity. In spleen, postnatal LTβR signaling is required for development of B cell follicles, follicular dendritic cells (FDCs), recruitment of neutrophils and maintenance of the marginal zone. Lymph nodes of iLTβRΔ/Δ mice were reduced in size, lacked FDCs, and had disorganized subcapsular sinus macrophages. Peyer`s patches were smaller in size and numbers, and displayed reduced FDCs. The number of isolated lymphoid follicles in small intestine and colon were also reduced. In contrast to LTβR-/- mice, iLTβRΔ/Δ mice displayed normal thymus structure and did not develop signs of systemic inflammation and autoimmunity. Further, our results suggest that LTβR signaling in adulthood is required for homeostasis of neutrophils, NK, and iNKT cells, but is dispensable for the maintenance of polyclonal IgA production. However, iLTβRΔ/Δ mice exhibited an increased sensitivity to C. rodentium infection and failed to develop pathogen-specific IgA responses. Collectively, our study uncovers new insights of LTβR signaling in adulthood for the maintenance of lymphoid organs, neutrophils, NK and iNKT cells, and IgA production in response to mucosal bacterial pathogen.
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Affiliation(s)
- Yajun Shou
- Department of Microbiology, Immunology and Molecular Genetics, University of Texas Health Science Center at San Antonio, San Antonio, TX, United States,Department of Gastroenterology, Second Xiangya Hospital of Central South University, Changsha, China
| | - Ekaterina Koroleva
- Department of Microbiology, Immunology and Molecular Genetics, University of Texas Health Science Center at San Antonio, San Antonio, TX, United States
| | | | - Sergey A. Shein
- Department of Microbiology, Immunology and Molecular Genetics, University of Texas Health Science Center at San Antonio, San Antonio, TX, United States
| | - Anna A. Korchagina
- Department of Microbiology, Immunology and Molecular Genetics, University of Texas Health Science Center at San Antonio, San Antonio, TX, United States
| | - Kizil A. Yusoof
- Department of Microbiology, Immunology and Molecular Genetics, University of Texas Health Science Center at San Antonio, San Antonio, TX, United States
| | - Raksha Parthasarathy
- Department of Microbiology, Immunology and Molecular Genetics, University of Texas Health Science Center at San Antonio, San Antonio, TX, United States
| | - Elizabeth A. Leadbetter
- Department of Microbiology, Immunology and Molecular Genetics, University of Texas Health Science Center at San Antonio, San Antonio, TX, United States
| | - Armen N. Akopian
- Department of Endodontics, University of Texas Health Science Center at San Antonio, San Antonio, TX, United States
| | - Amanda R. Muñoz
- Department of Microbiology, Immunology and Molecular Genetics, University of Texas Health Science Center at San Antonio, San Antonio, TX, United States
| | - Alexei V. Tumanov
- Department of Microbiology, Immunology and Molecular Genetics, University of Texas Health Science Center at San Antonio, San Antonio, TX, United States,*Correspondence: Alexei V. Tumanov,
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15
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Impact of food-derived bioactive peptides on gut function and health. Food Res Int 2021; 147:110485. [PMID: 34399481 DOI: 10.1016/j.foodres.2021.110485] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 05/10/2021] [Accepted: 05/23/2021] [Indexed: 12/14/2022]
Abstract
The gastrointestinal tract (GIT) is the largest interface between our body and the environment. It is an organ system extending from the mouth to the anus and functions for food intake, digestion, transport and absorption of nutrients, meanwhile providing protection from environmental factors, like toxins, antigens, and pathogens. Diet is one of the leading factors modulating the function of the GIT. Bioactive peptides presenting naturally in food or derived from food proteins during digestion or processing have been revealed multifunctional in diverse biological processes, including maintaining gut health and function. This review summarizes the available evidence regarding the effects of food-derived bioactive peptides on gut function and health. Findings and insights from studies based on in vitro and animal models are discussed. The gastrointestinal mucosa maintains a delicate balance between immune tolerance to nutrients and harmful components, which is crucial for the digestive system's normal functions. Dietary bioactive peptides positively impact gastrointestinal homeostasis by modulating the barrier function, immune responses, and gut microbiota. However, there is limited clinical evidence on the safety and efficacy of bioactive peptides, much less on the applications of dietary peptides for the treatment or prevention of diseases related to the GIT. Further study is warranted to establish the applications of bioactive peptides in regulating gut health and function.
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16
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Wiendl M, Becker E, Müller TM, Voskens CJ, Neurath MF, Zundler S. Targeting Immune Cell Trafficking - Insights From Research Models and Implications for Future IBD Therapy. Front Immunol 2021; 12:656452. [PMID: 34017333 PMCID: PMC8129496 DOI: 10.3389/fimmu.2021.656452] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 04/16/2021] [Indexed: 12/12/2022] Open
Abstract
Inflammatory bowel diseases (IBDs), including Crohn's disease (CD) and ulcerative colitis (UC) are multifactorial diseases with still unknown aetiology and an increasing prevalence and incidence worldwide. Despite plentiful therapeutic options for IBDs, the lack or loss of response in certain patients demands the development of further treatments to tackle this unmet medical need. In recent years, the success of the anti-α4β7 antibody vedolizumab highlighted the potential of targeting the homing of immune cells, which is now an important pillar of IBD therapy. Due to its complexity, leukocyte trafficking and the involved molecules offer a largely untapped resource for a plethora of potential therapeutic interventions. In this review, we aim to summarise current and future directions of specifically interfering with immune cell trafficking. We will comment on concepts of homing, retention and recirculation and particularly focus on the role of tissue-derived chemokines. Moreover, we will give an overview of the mode of action of drugs currently in use or still in the pipeline, highlighting their mechanisms and potential to reduce disease burden.
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Affiliation(s)
- Maximilian Wiendl
- Department of Medicine 1, Deutsches Zentrum Immuntherapie (DZI), University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Emily Becker
- Department of Medicine 1, Deutsches Zentrum Immuntherapie (DZI), University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Tanja M. Müller
- Department of Medicine 1, Deutsches Zentrum Immuntherapie (DZI), University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Caroline J. Voskens
- Department of Dermatology, University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Markus F. Neurath
- Department of Medicine 1, Deutsches Zentrum Immuntherapie (DZI), University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Sebastian Zundler
- Department of Medicine 1, Deutsches Zentrum Immuntherapie (DZI), University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
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17
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Jing X, Korchagina AA, Shein SA, Muraoka WT, Koroleva E, Tumanov AV. IL-23 Contributes to Campylobacter jejuni-Induced Intestinal Pathology via Promoting IL-17 and IFNγ Responses by Innate Lymphoid Cells. Front Immunol 2021; 11:579615. [PMID: 33488580 PMCID: PMC7815532 DOI: 10.3389/fimmu.2020.579615] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 11/23/2020] [Indexed: 12/13/2022] Open
Abstract
Human pathogen Campylobacter jejuni is a significant risk factor for the development of long-term intestinal dysfunction although the cellular and molecular mechanisms remain scantily defined. IL-23 is an emerging therapeutic target for the treatment of inflammatory intestinal diseases, however its role in C. jejuni-driven intestinal pathology is not fully understood. IL-10 deficient mice represent a robust model to study the pathogenesis of C. jejuni infection because C. jejuni infection of mice lacking IL-10 results in symptoms and pathology that resemble human campylobacteriosis. To determine the role of IL-23 in C. jejuni-driven intestinal inflammation, we studied the disease pathogenesis in IL-23-/- mice with inhibited IL-10Rα signaling. These mice exhibited reduced intestinal pathology independent from bacterial clearance. Further, levels of IFNγ, IL-17, IL-22, TNF, and IL-6 were reduced and associated with reduced accumulation of neutrophils, monocytes and macrophages in the colon. Flow cytometry analysis revealed reduced production of IL-17 and IFNγ by group 1 and 3 innate lymphoid cells. Thus, our data suggest that IL-23 contributes to intestinal inflammation in C. jejuni infected mice by promoting IL-17 and IFNγ production by innate lymphoid cells.
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Affiliation(s)
- Xi Jing
- Department of Microbiology, Immunology and Molecular Genetics, University of Texas Health Science Center at San Antonio, San Antonio, TX, United States.,Department of Gastroenterology, Third Xiangya Hospital of Central South University, Changsha, China
| | - Anna A Korchagina
- Department of Microbiology, Immunology and Molecular Genetics, University of Texas Health Science Center at San Antonio, San Antonio, TX, United States
| | - Sergey A Shein
- Department of Microbiology, Immunology and Molecular Genetics, University of Texas Health Science Center at San Antonio, San Antonio, TX, United States
| | - Wayne T Muraoka
- Department of Microbiology, Immunology and Molecular Genetics, University of Texas Health Science Center at San Antonio, San Antonio, TX, United States.,Trudeau Institute, Saranac Lake, NY, United States
| | - Ekaterina Koroleva
- Department of Microbiology, Immunology and Molecular Genetics, University of Texas Health Science Center at San Antonio, San Antonio, TX, United States
| | - Alexei V Tumanov
- Department of Microbiology, Immunology and Molecular Genetics, University of Texas Health Science Center at San Antonio, San Antonio, TX, United States
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18
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Mamareli P, Kruse F, Lu CW, Guderian M, Floess S, Rox K, Allan DSJ, Carlyle JR, Brönstrup M, Müller R, Berod L, Sparwasser T, Lochner M. Targeting cellular fatty acid synthesis limits T helper and innate lymphoid cell function during intestinal inflammation and infection. Mucosal Immunol 2021; 14:164-176. [PMID: 32355319 DOI: 10.1038/s41385-020-0285-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 03/13/2020] [Accepted: 03/24/2020] [Indexed: 02/04/2023]
Abstract
CD4+ T cells contribute critically to a protective immune response during intestinal infections, but have also been implicated in the aggravation of intestinal inflammatory pathology. Previous studies suggested that T helper type (Th)1 and Th17 cells depend on de novo fatty acid (FA) synthesis for their development and effector function. Here, we report that T-cell-specific targeting of the enzyme acetyl-CoA carboxylase 1 (ACC1), a major checkpoint controlling FA synthesis, impaired intestinal Th1 and Th17 responses by limiting CD4+ T-cell expansion and infiltration into the lamina propria in murine models of colitis and infection-associated intestinal inflammation. Importantly, pharmacological inhibition of ACC1 by the natural compound soraphen A mirrored the anti-inflammatory effects of T-cell-specific targeting, but also enhanced susceptibility toward infection with C. rodentium. Further analysis revealed that deletion of ACC1 in RORγt+ innate lymphoid cells (ILC), but not dendritic cells or macrophages, decreased resistance to infection by interfering with IL-22 production and intestinal barrier function. Together, our study suggests pharmacological targeting of ACC1 as an effective approach for metabolic immune modulation of T-cell-driven intestinal inflammatory responses, but also reveals an important role of ACC1-mediated lipogenesis for the function of RORγt+ ILC.
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Affiliation(s)
- Panagiota Mamareli
- Institute of Infection Immunology, TWINCORE, Centre for Experimental and Clinical Infection Research, Hannover, Germany.,Institute of Medical Microbiology and Hygiene, University Medical Center, Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Friederike Kruse
- Institute of Infection Immunology, TWINCORE, Centre for Experimental and Clinical Infection Research, Hannover, Germany
| | - Chia-Wen Lu
- Institute of Infection Immunology, TWINCORE, Centre for Experimental and Clinical Infection Research, Hannover, Germany.,Institute of Medical Microbiology and Hospital Epidemiology, Hannover Medical School, Hannover, Germany
| | - Melanie Guderian
- Institute of Infection Immunology, TWINCORE, Centre for Experimental and Clinical Infection Research, Hannover, Germany.,Institute of Medical Microbiology and Hospital Epidemiology, Hannover Medical School, Hannover, Germany
| | - Stefan Floess
- Department of Experimental Immunology, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Katharina Rox
- Department of Chemical Biology, Helmholtz Centre for Infection Research, Braunschweig, Germany.,German Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, Braunschweig, Germany
| | - David S J Allan
- Department of Immunology, University of Toronto, Toronto, ON, Canada
| | - James R Carlyle
- Department of Immunology, University of Toronto, Toronto, ON, Canada
| | - Mark Brönstrup
- Department of Chemical Biology, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Rolf Müller
- Helmholtz Institute for Pharmaceutical Research, Helmholtz Centre for Infection Research, Saarland University, Saarbrücken, Germany.,Department of Pharmaceutical Biotechnology, Saarland University, Saarbrücken, Germany
| | - Luciana Berod
- Institute of Infection Immunology, TWINCORE, Centre for Experimental and Clinical Infection Research, Hannover, Germany
| | - Tim Sparwasser
- Institute of Infection Immunology, TWINCORE, Centre for Experimental and Clinical Infection Research, Hannover, Germany.,Institute of Medical Microbiology and Hygiene, University Medical Center, Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Matthias Lochner
- Institute of Infection Immunology, TWINCORE, Centre for Experimental and Clinical Infection Research, Hannover, Germany. .,Institute of Medical Microbiology and Hospital Epidemiology, Hannover Medical School, Hannover, Germany.
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19
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Pöysti S, Silojärvi S, Toivonen R, Hänninen A. Plasmacytoid dendritic cells regulate host immune response to Citrobacter rodentium induced colitis in colon-draining lymph nodes. Eur J Immunol 2020; 51:620-625. [PMID: 33078848 DOI: 10.1002/eji.202048714] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 10/05/2020] [Accepted: 10/19/2020] [Indexed: 01/28/2023]
Abstract
Dendritic cells (DCs) are first in line to sense invading microbes and to deliver signals to other immune cells. Plasmacytoid DCs (pDC) produce high amounts of type I interferons (IFNs) but also regulate immune responses. Using the Clec4C (BDCA2)-diphtheria toxin receptor mouse model allowing conditional pDC depletion, we identified an essential role for pDCs in regulating intestinal inflammation locally in the gut. In pDC-depleted mice, Citrobacter rodentium infection led to enhanced activation of conventional DCs and induction of IFN-γ-producing Th1-cells in colon-draining lymph nodes, while induction of Foxp3+ /CD25+ Treg and IL-17-producing Th17 cells was impaired. Concomitantly, F4/80+ macrophages accumulated into the colon lamina propria in excess, and levels of Il-1β and Tnf transcripts increased and Foxp3+ Treg were fewer. Our results indicate that pDCs control inflammation in the gut during C. rodentium infection and that they have an important immune regulatory role in colon-draining lymph nodes.
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Affiliation(s)
- Sakari Pöysti
- Institute of Biomedicine, University of Turku, Turku, Finland.,Department of Clinical Microbiology and Immunology, Turku University Hospital, Turku, Finland
| | - Satu Silojärvi
- Institute of Biomedicine, University of Turku, Turku, Finland
| | - Raine Toivonen
- Institute of Biomedicine, University of Turku, Turku, Finland
| | - Arno Hänninen
- Institute of Biomedicine, University of Turku, Turku, Finland.,Department of Clinical Microbiology and Immunology, Turku University Hospital, Turku, Finland
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20
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Nettleford SK, Zhao L, Qian F, Herold M, Arner B, Desai D, Amin S, Xiong N, Singh V, Carlson BA, Prabhu KS. The Essential Role of Selenoproteins in the Resolution of Citrobacter rodentium-Induced Intestinal Inflammation. Front Nutr 2020; 7:96. [PMID: 32775340 PMCID: PMC7381334 DOI: 10.3389/fnut.2020.00096] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Accepted: 05/26/2020] [Indexed: 12/13/2022] Open
Abstract
Enteropathogenic Escherichia coli (EPEC) leads to adverse colonic inflammation associated with poor resolution of inflammation and loss of epithelial integrity. Micronutrient trace element selenium (Se) is incorporated into selenoproteins as the 21st amino acid, selenocysteine (Sec). Previous studies have shown that such an incorporation of Sec into the selenoproteome is key for the anti-inflammatory functions of Se in macrophages and other immune cells. An intriguing mechanism underlying the anti-inflammatory and pro-resolving effects of Se stems from the ability of selenoproteins to skew arachidonic acid metabolism from pro-inflammatory mediators, prostaglandin E2 (PGE2) toward anti-inflammatory mediators derived from PGD2, such as 15-deoxy-Δ12, 14- prostaglandin J2 (15d-PGJ2), via eicosanoid class switching of bioactive lipids. The impact of Se and such an eicosanoid-class switching mechanism was tested in an enteric infection model of gut inflammation by C. rodentium, a murine equivalent of EPEC. C57BL/6 mice deficient in Se (Se-D) experienced higher mortality when compared to those on Se adequate (0.08 ppm Se) and Se supplemented (0.4 ppm Se) diets following infection. Decreased survival was associated with decreased group 3 innate lymphoid cells (ILC3s) and T helper 17 (Th17) cells in colonic lamina propria of Se-D mice along with deceased expression of epithelial barrier protein Zo-1. Inhibition of metabolic inactivation of PGE2 by 15-prostaglandin dehydrogenase blocked the Se-dependent increase in ILC3 and Th17 cells in addition to reducing epithelial barrier integrity, as seen by increased systemic levels of FITC-dextran following oral administration; while 15d-PGJ2 administration in Se-D mice alleviated the effects by increasing ILC3 and Th17 cells. Mice lacking selenoproteins in monocyte/macrophages via the conditional deletion of the tRNA[Sec] showed increased mortality post infection. Our studies indicate a crucial role for dietary Se in the protection against inflammation following enteric infection via immune mechanisms involving epithelial barrier integrity.
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Affiliation(s)
- Shaneice K Nettleford
- Department of Veterinary and Biomedical Sciences, Center for Molecular Immunology and Infectious Disease, The Pennsylvania State University, State College, PA, United States
| | - Luming Zhao
- Department of Veterinary and Biomedical Sciences, Center for Molecular Immunology and Infectious Disease, The Pennsylvania State University, State College, PA, United States
| | - Fenghua Qian
- Department of Veterinary and Biomedical Sciences, Center for Molecular Immunology and Infectious Disease, The Pennsylvania State University, State College, PA, United States
| | - Morgan Herold
- Department of Veterinary and Biomedical Sciences, Center for Molecular Immunology and Infectious Disease, The Pennsylvania State University, State College, PA, United States
| | - Brooke Arner
- Department of Veterinary and Biomedical Sciences, Center for Molecular Immunology and Infectious Disease, The Pennsylvania State University, State College, PA, United States
| | - Dhimant Desai
- Department of Pharmacology, Organic Synthesis Core Laboratory, Penn State Cancer Institute, Penn State College of Medicine, Hershey, PA, United States
| | - Shantu Amin
- Department of Pharmacology, Organic Synthesis Core Laboratory, Penn State Cancer Institute, Penn State College of Medicine, Hershey, PA, United States
| | - Na Xiong
- Department of Microbiology, Immunology & Molecular Genetics, Long School of Medicine, University of Texas Health San Antonio, San Antonio, TX, United States
| | - Vishal Singh
- Department of Nutritional Sciences, The Pennsylvania State University, State College, PA, United States
| | - Bradley A Carlson
- Molecular Biology of Selenium Section, Mouse Genetics Program, National Cancer Institute, National Institutes of Health, Bethesda, MD, United States
| | - K Sandeep Prabhu
- Department of Veterinary and Biomedical Sciences, Center for Molecular Immunology and Infectious Disease, The Pennsylvania State University, State College, PA, United States
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21
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Bai X, Chi X, Qiao Q, Xie S, Wan S, Ni L, Wang P, Jin W, Dong C. T Follicular Helper Cells Regulate Humoral Response for Host Protection against Intestinal Citrobacter rodentium Infection. THE JOURNAL OF IMMUNOLOGY 2020; 204:2754-2761. [PMID: 32269096 DOI: 10.4049/jimmunol.2000046] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Accepted: 03/15/2020] [Indexed: 12/19/2022]
Abstract
Citrobacter rodentium colonizes at the colon and causes mucosal inflammation in mice. Previous studies have revealed the importance of the innate and adaptive immune response for controlling C. rodentium infection. In the present study, we examined the role of T follicular helper (Tfh) cells in intestinal C. rodentium infection using mice with Bcl6 deficiency in T cells. Tfh cells were absolutely required at the late, but not the early, phase to control infection. Compared with control mice, we observed systemic pathogen dissemination and more severe colitis in Tfh-deficient mice. Furthermore, the susceptibility of Tfh-deficient mice correlated with an impaired serum IgG1 response to infection, and serum Abs from infected wild-type mice protected Tfh-deficient mice from infection. The transfer of wild-type Tfh cells also restored the levels of IgG1 and led to effective clearance of the pathogens in Tfh-deficient mice. Moreover, during C. rodentium infection, IL-21- and IL-4-producing Tfh cells were increased obviously in wild-type mice, correlating with IgG1 as the major isotype in germinal center B cells. Taken together, our work highlights the requirement and the function of Tfh cells in regulating humoral response for the host protection against C. rodentium infection.
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Affiliation(s)
- Xue Bai
- Institute for Immunology and School of Medicine, Tsinghua University, Beijing 100084, China; and
| | - Xinxin Chi
- Institute for Immunology and School of Medicine, Tsinghua University, Beijing 100084, China; and
| | - Qin Qiao
- Institute for Immunology and School of Medicine, Tsinghua University, Beijing 100084, China; and
| | - Shan Xie
- Institute for Immunology and School of Medicine, Tsinghua University, Beijing 100084, China; and
| | - Siyuan Wan
- Institute for Immunology and School of Medicine, Tsinghua University, Beijing 100084, China; and
| | - Lu Ni
- Institute for Immunology and School of Medicine, Tsinghua University, Beijing 100084, China; and
| | - Pengzhi Wang
- Institute for Immunology and School of Medicine, Tsinghua University, Beijing 100084, China; and
| | - Wei Jin
- Institute for Immunology and School of Medicine, Tsinghua University, Beijing 100084, China; and
| | - Chen Dong
- Institute for Immunology and School of Medicine, Tsinghua University, Beijing 100084, China; and .,Beijing Key Laboratory for Immunological Research on Chronic Diseases, Beijing 100084, China
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22
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Evasion of Innate Lymphoid Cell-Regulated Gamma Interferon Responses by Chlamydia muridarum To Achieve Long-Lasting Colonization in Mouse Colon. Infect Immun 2020; 88:IAI.00798-19. [PMID: 31818961 DOI: 10.1128/iai.00798-19] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Accepted: 12/05/2019] [Indexed: 12/14/2022] Open
Abstract
Revealing the mechanisms by which bacteria establish long-lasting colonization in the gastrointestinal tract is an area of intensive investigation. The obligate intracellular bacterium Chlamydia is known to colonize mouse colon for long periods. A colonization-deficient mutant strain of this intracellular bacterium is able to regain long-lasting colonization in gamma interferon (IFN-γ) knockout mice following intracolon inoculation. We now report that mice deficient in conventional T lymphocytes or recombination-activating gene (Rag) failed to show rescue of mutant colonization. Nevertheless, antibody depletion of IFN-γ or genetic deletion of interleukin 2 (IL-2) receptor common gamma chain in Rag-deficient mice did rescue mutant colonization. These observations suggest that colonic IFN-γ, responsible for inhibiting the intracellular bacterial mutant, is produced by innate lymphoid cells (ILCs). Consistently, depletion of NK1.1+ cells in Rag-deficient mice both prevented IFN-γ production and rescued mutant colonization. Furthermore, mice deficient in transcriptional factor RORγt, but not chemokine receptor CCR6, showed full rescue of the long-lasting colonization of the mutant, indicating a role for group 3-like ILCs. However, the inhibitory function of the responsible group 3-like ILCs was not dependent on the natural killer cell receptor (NCR1), since NCR1-deficient mice still inhibited mutant colonization. Consistently, mice deficient in the transcriptional factor T-bet only delayed the clearance of the bacterial mutant without fully rescuing the long-lasting colonization of the mutant. Thus, we have demonstrated that the obligate intracellular bacterium Chlamydia maintains its long-lasting colonization in the colon by evading IFN-γ from group 3-like ILCs.
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23
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Warda AK, de Almeida Bettio PH, Hueston CM, Di Benedetto G, Clooney AG, Hill C. Oral Administration of Heat-Treated Lactobacilli Modifies the Murine Microbiome and Reduces Citrobacter Induced Colitis. Front Microbiol 2020; 11:69. [PMID: 32082288 PMCID: PMC7003559 DOI: 10.3389/fmicb.2020.00069] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Accepted: 01/14/2020] [Indexed: 12/16/2022] Open
Abstract
Significant evidence supports a relationship between the gut microbiome, inflammation, host response, and health, including the finding that a number of disorders are associated with disruption of the microbiome. In these disorders, a number of dietary interventions (including prebiotics, live probiotics, or heat-killed microbes) have been proposed to be curative or preventative agents. The use of heat-killed microbes has a number of benefits over living organisms, including reduced infection risk in vulnerable individuals, extended shelf life and the potential for use in combination with antimicrobial agents. We previously reported that murine chow supplemented with 5% ADR-159, a heat-treated fermentate generated by two Lactobacillus strains, altered both behavior and the microbiome of male mice. Now we show that ADR-159 fed female mice also display a similar microbiome shift as determined by 16S rDNA analysis. In particular, we observed a reduction of levels of Turicibacter and Clostridium sensu stricto. These subtle changes in the bacterial component of the microbiome were mirrored by changes in the virome. Extended consumption of the ADR-159 diet had no negative effect on general health and lipocalin 2 levels (LCN2; a proxy for inflammation), but we observed increased IL-17f and decreased IL-12α expression in the colon and decreased short chain fatty acid levels in the ADR-159 fed animals. Four weeks into the diet, half of the animals were dosed with Citrobacter to determine the effect of ADR-159 on infection and on pathogen induced colitis. Overall, our results suggest that while the ADR-159 diet does not prevent Citrobacter infection, it had an effect on Citrobacter-induced inflammation. In contrast to animals fed standard chow, ADR-159 fed animals did not show a reduction of small intestine length and increase of colon crypt depth, which occurred in control mice. These microbiological, histological, and immunological results provide evidence to support the impact of heat-treated microorganisms and their metabolites on the murine microbiome and health.
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Affiliation(s)
- Alicja K Warda
- APC Microbiome Ireland, University College Cork, Cork, Ireland
| | | | - Cara M Hueston
- APC Microbiome Ireland, University College Cork, Cork, Ireland
| | | | - Adam G Clooney
- APC Microbiome Ireland, University College Cork, Cork, Ireland
| | - Colin Hill
- APC Microbiome Ireland, University College Cork, Cork, Ireland.,School of Microbiology, University College Cork, Cork, Ireland
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24
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Boucher AA, Rosenfeldt L, Mureb D, Shafer J, Sharma BK, Lane A, Crowther RR, McKell MC, Whitt J, Alenghat T, Qualls J, Antoniak S, Mackman N, Flick MJ, Steinbrecher KA, Palumbo JS. Cell type-specific mechanisms coupling protease-activated receptor-1 to infectious colitis pathogenesis. J Thromb Haemost 2020; 18:91-103. [PMID: 31539206 PMCID: PMC7026906 DOI: 10.1111/jth.14641] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 08/29/2019] [Accepted: 09/16/2019] [Indexed: 12/12/2022]
Abstract
BACKGROUND Protease-activated receptor-1 (PAR-1) plays a major role in multiple disease processes, including colitis. Understanding the mechanisms coupling PAR-1 to disease pathogenesis is complicated by the fact that PAR-1 is broadly expressed across multiple cell types. OBJECTIVE Determine the specific contributions of PAR-1 expressed by macrophages and colonic enterocytes to infectious colitis. METHODS Mice carrying a conditional PAR-1 allele were generated and bred to mice expressing Cre recombinase in a myeloid- (PAR-1ΔM ) or enterocyte-specific (PAR-1ΔEPI ) fashion. Citrobacter rodentium colitis pathogenesis was analyzed in mice with global PAR-1 deletion (PAR-1-/- ) and cell type-specific deletions. RESULTS Constitutive deletion of PAR-1 had no significant impact on weight loss, crypt hypertrophy, crypt abscess formation, or leukocyte infiltration in Citrobacter colitis. However, colonic shortening was significantly blunted in infected PAR-1-/- mice, and these animals exhibited decreased local levels of IL-1β, IL-22, IL-6, and IL-17A. In contrast, infected PAR-1ΔM mice lost less weight and had fewer crypt abscesses relative to controls. PAR-1ΔM mice had diminished CD3+ T cell infiltration into colonic tissue, but macrophage and CD4+ T cell infiltration were similar to controls. Also contrasting results in global knockouts, PAR-1ΔM mice exhibited lower levels of IL-1β, but not Th17-related cytokines (ie, IL-22, IL-6, IL-17A). Infected PAR-1ΔEPI mice exhibited increased crypt hypertrophy and crypt abscess formation, but local cytokine elaboration was similar to controls. CONCLUSIONS These studies reveal complex, cell type-specific roles for PAR-1 in modulating the immune response to Citrobacter colitis that are not readily apparent in analyses limited to mice with global PAR-1 deficiency.
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Affiliation(s)
- Alexander A. Boucher
- Cancer and Blood Diseases Institute, Cincinnati Children’s Hospital Medical Center; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Leah Rosenfeldt
- Cancer and Blood Diseases Institute, Cincinnati Children’s Hospital Medical Center; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Duaa Mureb
- Cancer and Blood Diseases Institute, Cincinnati Children’s Hospital Medical Center; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Jessica Shafer
- Cancer and Blood Diseases Institute, Cincinnati Children’s Hospital Medical Center; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Bal Krishan Sharma
- Cancer and Blood Diseases Institute, Cincinnati Children’s Hospital Medical Center; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Adam Lane
- Cancer and Blood Diseases Institute, Cincinnati Children’s Hospital Medical Center; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Rebecca R. Crowther
- Division of Infectious Diseases, Cincinnati Children’s Hospital Medical Center and the University of Cincinnati College of Medicine, Cincinnati, Ohio
- Immunology Graduate Program, University of Cincinnati College of Medicine, Cincinnati, Ohio
- Medical Scientist Training Program, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Melanie C. McKell
- Division of Infectious Diseases, Cincinnati Children’s Hospital Medical Center and the University of Cincinnati College of Medicine, Cincinnati, Ohio
- Immunology Graduate Program, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Jordan Whitt
- Division of Immunobiology and Center for Inflammation and Tolerance, Cincinnati Children’s Hospital Medical Center and the University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Theresa Alenghat
- Division of Immunobiology and Center for Inflammation and Tolerance, Cincinnati Children’s Hospital Medical Center and the University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Joseph Qualls
- Division of Infectious Diseases, Cincinnati Children’s Hospital Medical Center and the University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Silvio Antoniak
- Department of Pathology and Laboratory Medicine, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Nigel Mackman
- Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Matthew J. Flick
- Department of Pathology and Laboratory Medicine, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Kris A. Steinbrecher
- Division of Gastroenterology, Cincinnati Children’s Hospital Medical Center and the University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Joseph S. Palumbo
- Cancer and Blood Diseases Institute, Cincinnati Children’s Hospital Medical Center; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio
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25
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He L, Zhou M, Li YC. Vitamin D/Vitamin D Receptor Signaling Is Required for Normal Development and Function of Group 3 Innate Lymphoid Cells in the Gut. iScience 2019; 17:119-131. [PMID: 31272068 PMCID: PMC6610723 DOI: 10.1016/j.isci.2019.06.026] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 04/30/2019] [Accepted: 06/14/2019] [Indexed: 12/20/2022] Open
Abstract
Group 3 innate lymphoid cells (ILC3) play key roles in protective immunity and mucosal barrier maintenance. Here we showed that vitamin D/vitamin D receptor (VDR) signaling regulates gut ILC3. VDR deletion or 1,25-dihydroxyvitamin D deficiency in mice led to a marked reduction in colonic ILC3 populations at steady state and impaired ILC3 responses following Citrobacter rodentium infection, resulting in substantial increases in intestinal bacterial growth and mouse mortality. VDR regulation of ILC3 was independent of T and B lymphocytes or gut microflora. Correction of 1,25-dihydroxyvitamin D deficiency rescued the ILC3 defects. Mechanistically, VDR deletion or 1,25-dihydroxyvitamin D deficiency markedly reduced colonic Ki67+ ILC3 populations, and in vivo and in vitro studies confirmed that vitamin D hormone directly stimulated ILC3 proliferation. Therefore, vitamin D/VDR signaling is required for ILC3-mediated innate immunity through regulation of ILC3 proliferation. VDR or 1,25(OH)2D3 deficiency reduces ILC3 populations and impairs ILC3 immunity Vitamin D/VDR signaling is required for proper ILC3 proliferation Vitamin D regulation of ILC3 is independent of T and B cells or gut microflora
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Affiliation(s)
- Lei He
- Department of Medicine, Division of Biological Sciences, The University of Chicago, Chicago, IL 60637, USA
| | - Min Zhou
- Department of Medicine, Division of Biological Sciences, The University of Chicago, Chicago, IL 60637, USA; Division of Gastroenterology, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China
| | - Yan Chun Li
- Department of Medicine, Division of Biological Sciences, The University of Chicago, Chicago, IL 60637, USA.
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26
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Saha P, Yeoh BS, Xiao X, Golonka RM, Singh V, Wang Y, Vijay-Kumar M. PAD4-dependent NETs generation are indispensable for intestinal clearance of Citrobacter rodentium. Mucosal Immunol 2019; 12:761-771. [PMID: 30710097 PMCID: PMC6519124 DOI: 10.1038/s41385-019-0139-3] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Revised: 01/07/2019] [Accepted: 01/16/2019] [Indexed: 02/04/2023]
Abstract
Peptidyl arginine deiminase-4 (PAD4) is indispensable for generation of neutrophil extracellular traps (NETs), which can provide antimicrobial effects during host innate immune response; however, the role of PAD4 against gastrointestinal infection is largely unknown. Herein, we challenged PAD4-deficient (Pad4-/-) mice and wild-type (WT) littermates with Citrobacter rodentium (CR), and investigated bacteria clearance and gut pathology. Luminal colonization of CR in Pad4-/- mice peaked between 11-14 days post-infection, whereas WT mice suppressed the infection by 14 days. We demonstrated that Pad4-/- mice were unable to form NETs, whereas WT mice showed increased NETs formation in the colon during infection. Pad4-/- mice showed aggravated CR-associated inflammation as indicated by elevated systemic and colonic pro-inflammatory markers. Histological analysis revealed that transmissible colonic hyperplasia, goblet cell depletion, and apoptotic cell death were more pronounced in the colon of CR-infected Pad4-/- mice. Treating WT mice with deoxyribonuclease I, which can disrupt NETs generation, recapitulated the exacerbated CR infection and gut pathology associated with the loss of PAD4. Administration of the PAD4 inhibitor, Cl-amidine also aggravated CR infection, but to a lesser extent. Taken together, our findings highlight the importance of PAD4 in the mucosal clearance of CR and in resolving gut-associated inflammation.
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Affiliation(s)
- Piu Saha
- Department of Physiology & Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH, 43614, USA
| | - Beng San Yeoh
- Graduate Program in Immunology & Infectious Disease, The Pennsylvania State University, University Park, Philadelphia, PA, 16802, USA
| | - Xia Xiao
- Division of Nephrology, MGH, Harvard Medical School, Boston, MA, 02114, USA
| | - Rachel M Golonka
- Department of Physiology & Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH, 43614, USA
| | - Vishal Singh
- Department of Physiology & Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH, 43614, USA
| | - Yanming Wang
- College of Life Sciences & Medicine, Henan University, Kaifeng, 475004, China
| | - Matam Vijay-Kumar
- Department of Physiology & Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH, 43614, USA.
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27
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Gaudino SJ, Kumar P. Cross-Talk Between Antigen Presenting Cells and T Cells Impacts Intestinal Homeostasis, Bacterial Infections, and Tumorigenesis. Front Immunol 2019; 10:360. [PMID: 30894857 PMCID: PMC6414782 DOI: 10.3389/fimmu.2019.00360] [Citation(s) in RCA: 232] [Impact Index Per Article: 46.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Accepted: 02/12/2019] [Indexed: 11/21/2022] Open
Abstract
Innate immunity is maintained in part by antigen presenting cells (APCs) including dendritic cells, macrophages, and B cells. APCs interact with T cells to link innate and adaptive immune responses. By displaying bacterial and tumorigenic antigens on their surface via major histocompatibility complexes, APCs can directly influence the differentiation of T cells. Likewise, T cell activation, differentiation, and effector functions are modulated by APCs utilizing multiple mechanisms. The objective of this review is to describe how APCs interact with and influence the activation of T cells to maintain innate immunity during exposure to microbial infection and malignant cells. How bacteria and cancer cells take advantage of some of these interactions for their own benefit will also be discussed. While this review will cover a broad range of topics, a general focus will be held around pathogens, cancers, and interactions that typically occur within the gastrointestinal tract.
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Affiliation(s)
- Stephen J Gaudino
- Department of Molecular Genetics and Microbiology, Stony Brook University, Stony Brook, NY, United States
| | - Pawan Kumar
- Department of Molecular Genetics and Microbiology, Stony Brook University, Stony Brook, NY, United States
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28
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Wang B, Lim JH, Kajikawa T, Li X, Vallance BA, Moutsopoulos NM, Chavakis T, Hajishengallis G. Macrophage β2-Integrins Regulate IL-22 by ILC3s and Protect from Lethal Citrobacter rodentium-Induced Colitis. Cell Rep 2019; 26:1614-1626.e5. [PMID: 30726742 PMCID: PMC6404229 DOI: 10.1016/j.celrep.2019.01.054] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 12/07/2018] [Accepted: 01/15/2019] [Indexed: 12/13/2022] Open
Abstract
β2-integrins promote neutrophil recruitment to infected tissues and are crucial for host defense. Neutrophil recruitment is defective in leukocyte adhesion deficiency type-1 (LAD1), a condition caused by mutations in the CD18 (β2-integrin) gene. Using a model of Citrobacter rodentium (CR)-induced colitis, we show that CD18-/- mice display increased intestinal damage and systemic bacterial burden, compared to littermate controls, ultimately succumbing to infection. This phenotype is not attributed to defective neutrophil recruitment, as it is shared by CXCR2-/- mice that survive CR infection. CR-infected CD18-/- mice feature prominent upregulation of IL-17 and downregulation of IL-22. Exogenous IL-22 administration, but not endogenous IL-17 neutralization, protects CD18-/- mice from lethal colitis. β2-integrin expression on macrophages is mechanistically linked to Rac1/ROS-mediated induction of noncanonical-NLRP3 (nucleotide-binding domain, leucine-rich-containing family, pyrin domain-containing-3) inflammasome-dependent IL-1β production, which promotes ILC3-derived IL-22. Therefore, β2-integrins are required for protective IL-1β-dependent IL-22 responses in colitis, and the identified mechanism may underlie the association of human LAD1 with colitis.
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Affiliation(s)
- Baomei Wang
- Department of Microbiology, University of Pennsylvania School of Dental Medicine, Philadelphia, PA 19104, USA.
| | - Jong-Hyung Lim
- Department of Microbiology, University of Pennsylvania School of Dental Medicine, Philadelphia, PA 19104, USA
| | - Tetsuhiro Kajikawa
- Department of Microbiology, University of Pennsylvania School of Dental Medicine, Philadelphia, PA 19104, USA
| | - Xiaofei Li
- Department of Microbiology, University of Pennsylvania School of Dental Medicine, Philadelphia, PA 19104, USA
| | - Bruce A Vallance
- Department of Pediatrics, Division of Gastroenterology, University of British Columbia, Vancouver, BC V6H 3N1, Canada
| | | | - Triantafyllos Chavakis
- Faculty of Medicine, Institute for Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, 01307 Dresden, Germany
| | - George Hajishengallis
- Department of Microbiology, University of Pennsylvania School of Dental Medicine, Philadelphia, PA 19104, USA.
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29
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Kanvinde S, Chhonker YS, Ahmad R, Yu F, Sleightholm R, Tang W, Jaramillo L, Chen Y, Sheinin Y, Li J, Murry DJ, Singh AB, Oupický D. Pharmacokinetics and efficacy of orally administered polymeric chloroquine as macromolecular drug in the treatment of inflammatory bowel disease. Acta Biomater 2018; 82:158-170. [PMID: 30342282 DOI: 10.1016/j.actbio.2018.10.027] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 10/15/2018] [Accepted: 10/16/2018] [Indexed: 12/27/2022]
Abstract
Inflammatory bowel disease is a chronic inflammation of the gastrointestinal tract with poor understanding of its pathogenesis and no effective cure. The goal of this study was to evaluate the feasibility of orally administered non-degradable polymeric chloroquine (pCQ) to locally reduce colon inflammation. The pCQ was synthesized by radical copolymerization of N-(2-hydroxypropyl)methacrylamide with methacryloylated hydroxychloroquine (HCQ). The anti-inflammatory activity of orally administered pCQ versus HCQ was tested in a mouse model of colitis induced by Citrobacter rodentium (C. rodentium). Single-dose pharmacokinetic and biodistribution studies performed in the colitis model indicated negligible systemic absorption (p ≤ 0.001) and localization of pCQ in the gastrointestinal tract. A multi-dose therapeutic study demonstrated that the localized pCQ treatment resulted in significant reduction in the colon inflammation (p ≤ 0.05). Enhanced suppression of pro-inflammatory cytokines IL-6 (p ≤ 0.01) and IL1-β and opposing upregulation of IL-2 (p ≤ 0.05) recently reported to be involved in downstream anti-inflammatory events suggested that the anti-inflammatory effects of the pCQ are mediated by altering mucosal immune homeostasis. Overall, the reported findings demonstrate a potential of pCQ as a novel polymer therapeutic option in inflammatory bowel disease with the potential of local effects and minimized systemic toxicity.
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Affiliation(s)
- Shrey Kanvinde
- Center for Drug Delivery and Nanomedicine, Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, NE 68198, United States
| | | | - Rizwan Ahmad
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, United States
| | - Fei Yu
- Center for Drug Delivery and Nanomedicine, Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, NE 68198, United States
| | - Richard Sleightholm
- Center for Drug Delivery and Nanomedicine, Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, NE 68198, United States
| | - Weimin Tang
- Center for Drug Delivery and Nanomedicine, Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, NE 68198, United States
| | - Lee Jaramillo
- Center for Drug Delivery and Nanomedicine, Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, NE 68198, United States
| | - Yi Chen
- Center for Drug Delivery and Nanomedicine, Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, NE 68198, United States
| | - Yuri Sheinin
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE, United States
| | - Jing Li
- Center for Drug Delivery and Nanomedicine, Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, NE 68198, United States
| | - Daryl J Murry
- Department of Pharmacy Practice, University of Nebraska Medical Center, United States
| | - Amar B Singh
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, United States
| | - David Oupický
- Center for Drug Delivery and Nanomedicine, Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, NE 68198, United States.
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Khan S, Imran A, Malik A, Chaudhary AA, Rub A, Jan AT, Syed JB, Rolfo C. Bacterial imbalance and gut pathologies: Association and contribution of E. coli in inflammatory bowel disease. Crit Rev Clin Lab Sci 2018; 56:1-17. [DOI: 10.1080/10408363.2018.1517144] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Shahanavaj Khan
- Nanomedicine Research Unit, Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
- Department of Bioscience, Shri Ram Group of College (SRGC), Muzaffarnagar, India
| | - Ahamad Imran
- King Abdullah Institute for Nanotechnology, King Saud University, Riyadh, Saudi Arabia
| | - Abdul Malik
- Department of Clinical Laboratory Science, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Anis Ahmad Chaudhary
- Department of Pharmacology, College of Medicine, Al-Imam Mohammad Ibn Saud Islamic University, Riyadh, Saudi Arabia
| | - Abdur Rub
- Department of Medical Laboratory Sciences, College of Applied Medical Sciences, Majmaah University, Al Majmaah, Saudi Arabia
| | - Arif Tasleem Jan
- School of Biotechnology, Yeungnam University, Gyeongsan, Republic of Korea
| | - Jakeera Begum Syed
- King Abdullah Institute for Nanotechnology, King Saud University, Riyadh, Saudi Arabia
- College of Medicine and Dentistry, Dar Al Uloom University, Riyadh, Saudi Arabia
| | - Christian Rolfo
- Phase I-Early Clinical Trials Unit, Oncology Department and Multidisciplinary Oncology Center Antwerp (MOCA), Antwerp University Hospital, Edegem, Belgium
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Myc-Associated Zinc Finger Protein Regulates the Proinflammatory Response in Colitis and Colon Cancer via STAT3 Signaling. Mol Cell Biol 2018; 38:MCB.00386-18. [PMID: 30181395 DOI: 10.1128/mcb.00386-18] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Accepted: 08/27/2018] [Indexed: 12/11/2022] Open
Abstract
Myc-associated zinc finger (MAZ) is a transcription factor highly upregulated in chronic inflammatory disease and several human cancers. In the present study, we found that MAZ protein is highly expressed in human ulcerative colitis and colon cancer. However, the precise role for MAZ in the progression of colitis and colon cancer is not well defined. To determine the function of MAZ, a novel mouse model of intestinal epithelial cell-specific MAZ overexpression was generated. Expression of MAZ in intestinal epithelial cells was sufficient to enhance inflammatory injury in two complementary models of colitis. Moreover, MAZ expression increased tumorigenesis in an in vivo model of inflammation-induced colon cancer and was important for growth of human colon cancer cell lines in vitro and in vivo Mechanistically, MAZ is critical in the regulation of oncogenic STAT3 signaling. MAZ-expressing mice have enhanced STAT3 activation in the acute response to colitis. Moreover, MAZ was essential for cytokine- and bacterium-induced STAT3 signaling in colon cancer cells. Furthermore, we show that STAT3 is essential for MAZ-induced colon tumorigenesis using a chemical inhibitor. These data indicate an important functional role for MAZ in the inflammatory progression of colon cancer through regulation of STAT3 signaling and suggest that MAZ is a potential therapeutic target to dampen STAT3 signaling in colon cancer.
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Kang E, Crouse A, Chevallier L, Pontier SM, Alzahrani A, Silué N, Campbell-Valois FX, Montagutelli X, Gruenheid S, Malo D. Enterobacteria and host resistance to infection. Mamm Genome 2018; 29:558-576. [PMID: 29785663 DOI: 10.1007/s00335-018-9749-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Accepted: 05/14/2018] [Indexed: 02/06/2023]
Abstract
Enterobacteriaceae are a large family of Gram-negative, non-spore-forming bacteria. Although many species exist as part of the natural flora of animals including humans, some members are associated with both intestinal and extraintestinal diseases. In this review, we focus on members of this family that have important roles in human disease: Salmonella, Escherichia, Shigella, and Yersinia, providing a brief overview of the disease caused by these bacteria, highlighting the contribution of animal models to our understanding of their pathogenesis and of host genetic determinants involved in susceptibility or resistance to infection.
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Affiliation(s)
- Eugene Kang
- Department of Microbiology and Immunology, McGill University, Montreal, QC, Canada
- McGill Research Center on Complex Traits, McGill University, Montreal, QC, Canada
| | - Alanna Crouse
- McGill Research Center on Complex Traits, McGill University, Montreal, QC, Canada
- Department of Human Genetics, McGill University, Montreal, QC, Canada
| | - Lucie Chevallier
- U955 - IMRB, Team 10 - Biology of the neuromuscular system, Inserm, École Nationale Vétérinaire d'Alfort, UPEC, Maisons-Alfort, France
- Mouse Genetics Laboratory, Department of Genomes and Genetics, Institut Pasteur, Paris, France
| | - Stéphanie M Pontier
- Department of Chemistry and Biomolecular Sciences, Centre for Chemical and Synthetic Biology, University of Ottawa, Ottawa, ON, Canada
| | - Ashwag Alzahrani
- Department of Chemistry and Biomolecular Sciences, Centre for Chemical and Synthetic Biology, University of Ottawa, Ottawa, ON, Canada
| | - Navoun Silué
- Department of Chemistry and Biomolecular Sciences, Centre for Chemical and Synthetic Biology, University of Ottawa, Ottawa, ON, Canada
| | - François-Xavier Campbell-Valois
- Department of Chemistry and Biomolecular Sciences, Centre for Chemical and Synthetic Biology, University of Ottawa, Ottawa, ON, Canada
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, ON, Canada
| | - Xavier Montagutelli
- U955 - IMRB, Team 10 - Biology of the neuromuscular system, Inserm, École Nationale Vétérinaire d'Alfort, UPEC, Maisons-Alfort, France
| | - Samantha Gruenheid
- Department of Microbiology and Immunology, McGill University, Montreal, QC, Canada
- McGill Research Center on Complex Traits, McGill University, Montreal, QC, Canada
| | - Danielle Malo
- McGill Research Center on Complex Traits, McGill University, Montreal, QC, Canada.
- Department of Human Genetics, McGill University, Montreal, QC, Canada.
- Department of Medicine, McGill University, Montreal, QC, Canada.
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Kuhn KA, Schulz HM, Regner EH, Severs EL, Hendrickson JD, Mehta G, Whitney AK, Ir D, Ohri N, Robertson CE, Frank DN, Campbell EL, Colgan SP. Bacteroidales recruit IL-6-producing intraepithelial lymphocytes in the colon to promote barrier integrity. Mucosal Immunol 2018; 11:357-368. [PMID: 28812548 PMCID: PMC5815964 DOI: 10.1038/mi.2017.55] [Citation(s) in RCA: 93] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Accepted: 05/12/2017] [Indexed: 02/04/2023]
Abstract
Interactions between the microbiota and distal gut are important for the maintenance of a healthy intestinal barrier; dysbiosis of intestinal microbial communities has emerged as a likely contributor to diseases that arise at the level of the mucosa. Intraepithelial lymphocytes (IELs) are positioned within the epithelial barrier, and in the small intestine they function to maintain epithelial homeostasis. We hypothesized that colon IELs promote epithelial barrier function through the expression of cytokines in response to interactions with commensal bacteria. Profiling of bacterial 16S ribosomal RNA revealed that candidate bacteria in the order Bacteroidales are sufficient to promote IEL presence in the colon that in turn produce interleukin-6 (IL-6) in a MyD88 (myeloid differentiation primary response 88)-dependent manner. IEL-derived IL-6 is functionally important in the maintenance of the epithelial barrier as IL-6-/- mice were noted to have increased paracellular permeability, decreased claudin-1 expression, and a thinner mucus gel layer, all of which were reversed by transfer of IL-6+/+ IELs, leading to protection of mice in response to Citrobacter rodentium infection. Therefore, we conclude that microbiota provide a homeostatic role for epithelial barrier function through regulation of IEL-derived IL-6.
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Affiliation(s)
- Kristine A. Kuhn
- Division of Rheumatology, University of Colorado School of Medicine, Aurora CO
- Mucosal Inflammation Program, University of Colorado School of Medicine, Aurora CO
| | - Hanna M. Schulz
- Division of Rheumatology, University of Colorado School of Medicine, Aurora CO
- Mucosal Inflammation Program, University of Colorado School of Medicine, Aurora CO
| | - Emilie H. Regner
- Division of Gastroenterology, University of Colorado School of Medicine, Aurora CO
| | - Erin L. Severs
- Division of Rheumatology, University of Colorado School of Medicine, Aurora CO
- Mucosal Inflammation Program, University of Colorado School of Medicine, Aurora CO
| | - Jason D. Hendrickson
- Division of Rheumatology, University of Colorado School of Medicine, Aurora CO
- Mucosal Inflammation Program, University of Colorado School of Medicine, Aurora CO
| | - Gaurav Mehta
- Division of Rheumatology, University of Colorado School of Medicine, Aurora CO
- Mucosal Inflammation Program, University of Colorado School of Medicine, Aurora CO
| | - Alyssa K. Whitney
- Division of Gastroenterology, University of Colorado School of Medicine, Aurora CO
- Mucosal Inflammation Program, University of Colorado School of Medicine, Aurora CO
| | - Diana Ir
- Division of Infectious Diseases, University of Colorado School of Medicine, Aurora CO
| | - Neha Ohri
- Division of Rheumatology, University of Colorado School of Medicine, Aurora CO
- Mucosal Inflammation Program, University of Colorado School of Medicine, Aurora CO
| | - Charles E. Robertson
- Division of Infectious Diseases, University of Colorado School of Medicine, Aurora CO
| | - Daniel N. Frank
- Division of Infectious Diseases, University of Colorado School of Medicine, Aurora CO
| | - Eric L. Campbell
- Division of Gastroenterology, University of Colorado School of Medicine, Aurora CO
- Mucosal Inflammation Program, University of Colorado School of Medicine, Aurora CO
| | - Sean P. Colgan
- Division of Gastroenterology, University of Colorado School of Medicine, Aurora CO
- Mucosal Inflammation Program, University of Colorado School of Medicine, Aurora CO
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Epithelial Histone Deacetylase 3 Instructs Intestinal Immunity by Coordinating Local Lymphocyte Activation. Cell Rep 2018; 19:1165-1175. [PMID: 28494866 DOI: 10.1016/j.celrep.2017.04.046] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Revised: 03/17/2017] [Accepted: 04/14/2017] [Indexed: 12/20/2022] Open
Abstract
Mucosal tissues are constantly in direct contact with diverse beneficial and pathogenic microbes, highlighting the need for orchestrating complex microbial signals to sustain effective host defense. Here, we show an essential role for intestinal epithelial cell expression of histone deacetylase 3 (HDAC3) in responding to pathogenic microbes and activating protective innate immunity. Mice lacking HDAC3 in intestinal epithelial cells were more susceptible to Citrobacter rodentium when under tonic stimulation by the commensal microbiota. This impaired host defense reflected significantly decreased IFNγ production by intraepithelial CD8+ T cells early during infection. Further, HDAC3 was necessary for infection-induced epithelial expression of the IFNγ-inducing factor IL-18, and administration of IL-18 restored IFNγ activity to resident CD8+ T cells and reduced infection. Thus, HDAC3 mediates communication between intestinal epithelial cells and resident lymphocytes, revealing that epithelial priming by an epigenetic modifier may direct mucosal regulation of host defense against pathogenic microbes.
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Mintz M, Khair S, Grewal S, LaComb JF, Park J, Channer B, Rajapakse R, Bucobo JC, Buscaglia JM, Monzur F, Chawla A, Yang J, Robertson CE, Frank DN, Li E. Longitudinal microbiome analysis of single donor fecal microbiota transplantation in patients with recurrent Clostridium difficile infection and/or ulcerative colitis. PLoS One 2018; 13:e0190997. [PMID: 29385143 PMCID: PMC5791968 DOI: 10.1371/journal.pone.0190997] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Accepted: 12/22/2017] [Indexed: 12/14/2022] Open
Abstract
Background Studies of colonoscopic fecal microbiota transplant (FMT) in patients with recurrent CDI, indicate that this is a very effective treatment for preventing further relapses. In order to provide this service at Stony Brook University Hospital, we initiated an open-label prospective study of single colonoscopic FMT among patients with ≥ 2 recurrences of CDI, with the intention of monitoring microbial composition in the recipient before and after FMT, as compared with their respective donor. We also initiated a concurrent open label prospective trial of single colonoscopic FMT of patients with ulcerative colitis (UC) not responsive to therapy, after obtaining an IND permit (IND 15642). To characterize how FMT alters the fecal microbiota in patients with recurrent Clostridia difficile infections (CDI) and/or UC, we report the results of a pilot microbiome analysis of 11 recipients with a history of 2 or more recurrences of C. difficile infections without inflammatory bowel disease (CDI-only), 3 UC recipients with recurrent C. difficile infections (CDI + UC), and 5 UC recipients without a history of C. difficile infections (UC-only). Method V3V4 Illumina 16S ribosomal RNA (rRNA) gene sequencing was performed on the pre-FMT, 1-week post-FMT, and 3-months post-FMT recipient fecal samples along with those collected from the healthy donors. Fitted linear mixed models were used to examine the effects of Group (CDI-only, CDI + UC, UC-only), timing of FMT (Donor, pre-FMT, 1-week post-FMT, 3-months post-FMT) and first order Group*FMT interactions on the diversity and composition of fecal microbiota. Pairwise comparisons were then carried out on the recipient vs. donor and between the pre-FMT, 1-week post-FMT, and 3-months post-FMT recipient samples within each group. Results Significant effects of FMT on overall microbiota composition (e.g., beta diversity) were observed for the CDI-only and CDI + UC groups. Marked decreases in the relative abundances of the strictly anaerobic Bacteroidetes phylum, and two Firmicutes sub-phyla associated with butyrate production (Ruminococcaceae and Lachnospiraceae) were observed between the CDI-only and CDI + UC recipient groups. There were corresponding increases in the microaerophilic Proteobacteria phylum and the Firmicutes/Bacilli group in the CDI-only and CDI + UC recipient groups. At a more granular level, significant effects of FMT were observed for 81 genus-level operational taxonomic units (OTUs) in at least one of the three recipient groups (p<0.00016 with Bonferroni correction). Pairwise comparisons of the estimated pre-FMT recipient/donor relative abundance ratios identified 6 Gammaproteobacteria OTUs, including the Escherichia-Shigella genus, and 2 Fusobacteria OTUs with significantly increased relative abundance in the pre-FMT samples of all three recipient groups (FDR < 0.05), however the magnitude of the fold change was much larger in the CDI-only and CDI + UC recipients than in the UC-only recipients. Depletion of butyrate producing OTUs, such as Faecalibacterium, in the CDI-only and CDI + UC recipients, were restored after FMT. Conclusion The results from this pilot study suggest that the microbial imbalances in the CDI + UC recipients more closely resemble those of the CDI-only recipients than the UC-only recipients.
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Affiliation(s)
- Michael Mintz
- Department of Medicine, Stony Brook University, Stony Brook, New York, United States of America
| | - Shanawaj Khair
- Department of Medicine, Stony Brook University, Stony Brook, New York, United States of America
| | - Suman Grewal
- Department of Medicine, Stony Brook University, Stony Brook, New York, United States of America
| | - Joseph F. LaComb
- Department of Medicine, Stony Brook University, Stony Brook, New York, United States of America
| | - Jiyhe Park
- Department of Applied Mathematics and Statistics, Stony Brook University, Stony Brook, New York, United States of America
| | - Breana Channer
- Department of Medicine, Stony Brook University, Stony Brook, New York, United States of America
| | - Ramona Rajapakse
- Department of Medicine, Stony Brook University, Stony Brook, New York, United States of America
| | - Juan Carlos Bucobo
- Department of Medicine, Stony Brook University, Stony Brook, New York, United States of America
| | - Jonathan M. Buscaglia
- Department of Medicine, Stony Brook University, Stony Brook, New York, United States of America
| | - Farah Monzur
- Department of Medicine, Stony Brook University, Stony Brook, New York, United States of America
| | - Anupama Chawla
- Department of Pediatrics, Stony Brook University, Stony Brook, New York, United States of America
| | - Jie Yang
- Department of Family, Population and Preventive Medicine, Stony Brook University, Stony Brook, New York, United States of America
| | - Charlie E. Robertson
- Department of Medicine, University of Colorado Denver, Aurora, Colorado, United States of America
| | - Daniel N. Frank
- Department of Medicine, University of Colorado Denver, Aurora, Colorado, United States of America
| | - Ellen Li
- Department of Medicine, Stony Brook University, Stony Brook, New York, United States of America
- * E-mail:
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Bosman ES, Chan JM, Bhullar K, Vallance BA. Investigation of Host and Pathogen Contributions to Infectious Colitis Using the Citrobacter rodentium Mouse Model of Infection. Methods Mol Biol 2017; 1422:225-41. [PMID: 27246037 DOI: 10.1007/978-1-4939-3603-8_21] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Citrobacter rodentium is used as a model organism to study enteric bacterial infections in mice. Infection occurs via the oral-fecal route and results in the pathogen forming attaching and effacing lesions on infected epithelial cells. Moreover, infection leads to a subsequent host-mediated form of colitis. C. rodentium infection is thus an excellent model to study infectious colitis in vivo, while the ability to genetically manipulate C. rodentium virulence genes provides the opportunity to develop clear insights into the pathogenesis of this and related infectious microbes. This chapter outlines the basic techniques involved in setting up a C. rodentium infection in mice and several different methodologies to assess the severity of the infection.
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Affiliation(s)
- Else S Bosman
- Division of Gastroenterology, Department of Pediatrics, BC Children Hospital, Vancouver, BC, Canada
| | - Justin M Chan
- Division of Gastroenterology, Department of Pediatrics, BC Children Hospital, Vancouver, BC, Canada
| | - Kirandeep Bhullar
- Division of Gastroenterology, Department of Pediatrics, BC Children Hospital, Vancouver, BC, Canada
| | - Bruce A Vallance
- Division of Gastroenterology, Department of Pediatrics, BC Children's Hospital, Rm K4-188, 4480 Oak St., Ambulatory Care Building, Vancouver, BC, Canada, V6H 3V4.
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Bouladoux N, Harrison OJ, Belkaid Y. The Mouse Model of Infection with Citrobacter rodentium. ACTA ACUST UNITED AC 2017; 119:19.15.1-19.15.25. [PMID: 29091261 DOI: 10.1002/cpim.34] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Citrobacter rodentium is a murine mucosal pathogen used as a model to elucidate the molecular and cellular pathogenesis of infection with two clinically important human gastrointestinal pathogens, enteropathogenic Escherichia coli (EPEC) and enterohaemorrhagic E. coli (EHEC). C. rodentium infection provides an excellent model to study different aspects of host-pathogen interaction in the gut, including intestinal inflammatory responses during bacteria-induced colitis, mucosal healing and epithelial repair, the induction of mucosal immune responses, and the role of the intestinal microbiota in mediating resistance to colonization by enteric pathogens. This unit provides detailed protocols for growing this bacterium, infecting mice by intragastric inoculation, measuring bacterial loads in feces and organs, and monitoring intestinal pathology induced by infection. Additional protocols describe steps needed to create frozen stocks, establish a growth curve, perform ex vivo organ cultures, isolate immune cells from the large intestine, and measure immune response by flow cytometry. © 2017 by John Wiley & Sons, Inc.
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Affiliation(s)
- Nicolas Bouladoux
- Mucosal Immunology Section, Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, Maryland.,NIAID Microbiome Program, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, Maryland
| | - Oliver J Harrison
- Mucosal Immunology Section, Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, Maryland
| | - Yasmine Belkaid
- Mucosal Immunology Section, Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, Maryland.,NIAID Microbiome Program, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, Maryland
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Suo C, Fan Z, Zhou L, Qiu J. Perfluorooctane sulfonate affects intestinal immunity against bacterial infection. Sci Rep 2017; 7:5166. [PMID: 28701769 PMCID: PMC5507904 DOI: 10.1038/s41598-017-04091-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Accepted: 05/09/2017] [Indexed: 02/07/2023] Open
Abstract
Perfluorooctane sulfonate (PFOS) is an environmental contaminant that has been manufactured to be used as surfactants and repellents in industry. Due to long half-life for clearance and degradation, PFOS is accumulative in human body and has potential threat to human health. Previous studies have shown the development and function of immune cells can be affected by PFOS. Although PFOS has a high chance of being absorbed through the oral route, whether and how PFOS affects immune cells in the gut is unknown. Using mouse model of Citrobacter rodentium infection, we investigated the role of PFOS on intestinal immunity. We found at early phase of the infection, PFOS inhibited the expansion of the pathogen by promoting IL-22 production from the group 3 innate lymphoid cell (ILC3) in an aryl hydrocarbon receptor dependent manner. Nevertheless, persistent PFOS treatment in mice finally led to a failure to clear the pathogen completely. At late phase of infection, enhanced bacterial counts in PFOS treated mice were accompanied by increased inflammatory cytokines, reduced mucin production and dysbiosis, featured by decreased level of Lactobacillus casei, Lactobacillus johnsonii and increased E. coli. Our study reveals a deleterious consequence in intestinal bacterial infection caused by PFOS accumulation.
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Affiliation(s)
- Caixia Suo
- The Key Laboratory of Stem Cell Biology, Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences and Shanghai Jiao Tong University School of Medicine, University of Chinese Academy of Sciences, Shanghai, 200031, China
| | - Zhiqin Fan
- The Key Laboratory of Stem Cell Biology, Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences and Shanghai Jiao Tong University School of Medicine, University of Chinese Academy of Sciences, Shanghai, 200031, China
| | - Liang Zhou
- Department of Infectious Diseases and Pathology, College of Veterinary Medicine The University of Florida, Gainesville, FL, 32608, USA
| | - Ju Qiu
- The Key Laboratory of Stem Cell Biology, Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences and Shanghai Jiao Tong University School of Medicine, University of Chinese Academy of Sciences, Shanghai, 200031, China.
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Rivera-Chávez F, Lopez CA, Bäumler AJ. Oxygen as a driver of gut dysbiosis. Free Radic Biol Med 2017; 105:93-101. [PMID: 27677568 DOI: 10.1016/j.freeradbiomed.2016.09.022] [Citation(s) in RCA: 174] [Impact Index Per Article: 24.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Revised: 09/09/2016] [Accepted: 09/23/2016] [Indexed: 12/13/2022]
Abstract
Changes in the composition of gut-associated microbial communities may underlie many inflammatory and allergic diseases. However, the processes that help maintain a stable community structure are poorly understood. Here we review topical work elucidating the nutrient-niche occupied by facultative anaerobic bacteria of the family Enterobacteriaceae, whose predominance within the gut-associated microbial community is a common marker of dysbiosis. A paucity of exogenous respiratory electron acceptors limits growth of Enterobacteriaceae within a balanced gut-associated microbial community. However, recent studies suggest that the availability of oxygen in the large bowel is markedly elevated by changes in host physiology that accompany antibiotic treatment or infection with enteric pathogens, such as Salmonella serovars or attaching and effacing (AE) pathogens. The resulting increase in oxygen availability, alone or in conjunction with other electron acceptors, drives an uncontrolled luminal expansion of Enterobacteriaceae. Insights into the underlying mechanisms provide important clues about factors that control the balance between the host and its resident microbial communities.
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Affiliation(s)
- Fabian Rivera-Chávez
- Department of Medical Microbiology and Immunology, School of Medicine, University of California Davis, One Shields Ave, Davis, CA 95616, USA
| | - Christopher A Lopez
- Department of Medical Microbiology and Immunology, School of Medicine, University of California Davis, One Shields Ave, Davis, CA 95616, USA
| | - Andreas J Bäumler
- Department of Medical Microbiology and Immunology, School of Medicine, University of California Davis, One Shields Ave, Davis, CA 95616, USA.
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Gubernatorova EO, Tumanov AV. Tumor Necrosis Factor and Lymphotoxin in Regulation of Intestinal Inflammation. BIOCHEMISTRY. BIOKHIMIIA 2016; 81:1309-1325. [PMID: 27914457 DOI: 10.1134/s0006297916110092] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2023]
Abstract
Ulcerative colitis and Crohn's disease are the major forms of inflammatory bowel disease. Cytokines of the tumor necrosis factor (TNF) family play an important role in the regulation of intestinal inflammation. In this review, we discuss the function of key cytokines of this family - TNF and lymphotoxin (LT) - in mucosal healing, IgA production, and in control of innate lymphoid cells (ILCs), novel regulators of mucosal homeostasis in the gut. TNF plays a central role in the pathogenesis of inflammatory bowel diseases (IBD). LT regulates group 3 of ILCs and IL-22 production and protects the epithelium against damage by chemicals and mucosal bacterial pathogens. In addition, we discuss major mouse models employed to study the mechanism of intestinal inflammation, their advantages and limitations, as well as application of TNF blockers in the therapy for IBD.
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Affiliation(s)
- E O Gubernatorova
- Institute of Molecular Biology, Russian Academy of Sciences, Moscow, 119991, Russia.
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