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Yang H, Cai R, Kong Z, Chen Y, Cheng C, Qi S, Gu B. Teasaponin Ameliorates Murine Colitis by Regulating Gut Microbiota and Suppressing the Immune System Response. Front Med (Lausanne) 2020; 7:584369. [PMID: 33363184 PMCID: PMC7758452 DOI: 10.3389/fmed.2020.584369] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 11/17/2020] [Indexed: 12/15/2022] Open
Abstract
Background: Dietary intervention is an exciting topic in current research of inflammatory bowel disease (IBD). The effect of teasaponin (TS) on IBD has not been fully elucidated. Here, we aim to investigate the intestinal anti-inflammatory activity of TS in a dextran sodium sulfate (DSS)-induced colitis mouse model and identify potential mechanisms. Methods: We applied TS to mice with DSS-induced colitis and then monitored the body weight, disease activity index (DAI) daily. When sacrificed, the intestinal permeability was measured. The analysis of mucin and tight junction proteins was conducted. We detected the inflammatory cytokines, the immune cells and related inflammatory signaling pathways. In addition, the gut microbiota were analyzed by 16S rRNA sequencing and we also performed fecal microbiota transplantation (FMT). Results: It showed that TS ameliorated the colonic damage by lowering the DAI, prolonging the colon length, reducing inflammatory cytokines and improving the mucus barrier. Parallel to down-regulation of the inflammatory cytokines, the fecal lipocalin 2, p-P65, p-STAT3, and neutrophil accumulation were also decreased in TS-treated mice. Microbiota characterization showed that Campylobacteria, Proteobacteria, Helicobacter, and Enterobacteriaceae were the key bacteria associated with IBD. In addition, TS could reverse the Firmicutes/Bacteroidetes (F/B) ratio and increase the beneficial bacteria, including Akkermansia and Bacteroides. TS ameliorated DSS-induced colitis by regulating the gut microbiota, and the gut microbiota could regulate gut inflammation. Conclusions: These studies demonstrated that TS ameliorated murine colitis through the modulation of immune response, mucus barrier and gut microbiota, thus improving gut dysbiosis. In addition, the gut microbiota may play an important role in regulating the host's innate immune system, and the two coexist and are mutually beneficial. We provide a promising perspective on the clinical treatment of IBD.
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Affiliation(s)
- Huan Yang
- Xuzhou Key Laboratory of Laboratory Diagnostics, Medical Technology School of Xuzhou Medical University, Xuzhou, China
| | - Rui Cai
- Xuzhou Key Laboratory of Laboratory Diagnostics, Medical Technology School of Xuzhou Medical University, Xuzhou, China
| | - Ziyan Kong
- Xuzhou Key Laboratory of Laboratory Diagnostics, Medical Technology School of Xuzhou Medical University, Xuzhou, China
| | - Ying Chen
- Xuzhou Key Laboratory of Laboratory Diagnostics, Medical Technology School of Xuzhou Medical University, Xuzhou, China
| | - Chen Cheng
- Xuzhou Key Laboratory of Laboratory Diagnostics, Medical Technology School of Xuzhou Medical University, Xuzhou, China
| | - Suhua Qi
- Xuzhou Key Laboratory of Laboratory Diagnostics, Medical Technology School of Xuzhou Medical University, Xuzhou, China
| | - Bing Gu
- Xuzhou Key Laboratory of Laboratory Diagnostics, Medical Technology School of Xuzhou Medical University, Xuzhou, China.,Department of Laboratory Medicine, Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
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52
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Kim E, Kim Y, Lee J, Shin JH, Seok PR, Kim Y, Yoo SH. Leucrose, a natural sucrose isomer, suppresses dextran sulfate sodium (DSS)-induced colitis in mice by regulating macrophage polarization via JAK1/STAT6 signaling. J Funct Foods 2020. [DOI: 10.1016/j.jff.2020.104156] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
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53
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Kim SJ, Howe C, Mitchell J, Choo J, Powers A, Oikonomopoulos A, Pothoulakis C, Hommes DW, Im E, Rhee SH. Autotaxin loss accelerates intestinal inflammation by suppressing TLR4-mediated immune responses. EMBO Rep 2020; 21:e49332. [PMID: 32875703 DOI: 10.15252/embr.201949332] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 07/20/2020] [Accepted: 08/10/2020] [Indexed: 12/13/2022] Open
Abstract
Autotaxin (ATX) converts lysophosphatidylcholine and sphingosyl-phosphorylcholine into lysophosphatidic acid and sphingosine 1-phosphate, respectively. Despite the pivotal function of ATX in lipid metabolism, mechanisms by which ATX regulates immune and inflammatory disorders remain elusive. Here, using myeloid cell lineage-restricted Atx knockout mice, we show that Atx deficiency disrupts membrane microdomains and lipid rafts, resulting in the inhibition of Toll-like receptor 4 (TLR4) complex formation and the suppression of adaptor recruitment, thereby inhibiting TLR4-mediated responses in macrophages. Accordingly, TLR4-induced innate immune functions, including phagocytosis and iNOS expression, are attenuated in Atx-deficient macrophages. Consequently, Atx-/- mice exhibit a higher bacterial prevalence in the intestinal mucosa compared to controls. When combined with global Il10-/- mice, which show spontaneous colitis due to the translocation of luminal commensal microbes into the mucosa, myeloid cell lineage-restricted Atx knockout accelerates colitis development compared to control littermates. Collectively, our data reveal that Atx deficiency compromises innate immune responses, thereby promoting microbe-associated gut inflammation.
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Affiliation(s)
- Su Jin Kim
- Department of Biological Sciences, Oakland University, Rochester, MI, USA.,College of Pharmacy, Pusan National University, Busan, Korea
| | - Cody Howe
- Department of Biological Sciences, Oakland University, Rochester, MI, USA
| | - Jonathon Mitchell
- Department of Biological Sciences, Oakland University, Rochester, MI, USA
| | - Jieun Choo
- College of Pharmacy, Pusan National University, Busan, Korea
| | - Alexandra Powers
- Department of Biological Sciences, Oakland University, Rochester, MI, USA
| | - Angelos Oikonomopoulos
- Division of Digestive Diseases, David Geffen School of Medicine, University of California, Los Angeles, CA, USA
| | - Charalabos Pothoulakis
- Division of Digestive Diseases, David Geffen School of Medicine, University of California, Los Angeles, CA, USA
| | - Daniel W Hommes
- Division of Digestive Diseases, David Geffen School of Medicine, University of California, Los Angeles, CA, USA
| | - Eunok Im
- College of Pharmacy, Pusan National University, Busan, Korea
| | - Sang Hoon Rhee
- Department of Biological Sciences, Oakland University, Rochester, MI, USA
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54
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Chulkina MM, Pichugin AV, Ataullakhanov RI. Pharmaceutical grade synthetic peptide Thr-Glu-Lys-Lys-Arg-Arg-Glu-Thr-Val-Glu-Arg-Glu-Lys-Glu ameliorates DSS-induced murine colitis by reducing the number and pro-inflammatory activity of colon tissue-infiltrating Ly6G + granulocytes and Ly6C + monocytes. Peptides 2020; 132:170364. [PMID: 32621844 DOI: 10.1016/j.peptides.2020.170364] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 06/30/2020] [Accepted: 06/30/2020] [Indexed: 01/08/2023]
Abstract
A pharmaceutical grade synthetic tetradecapeptide Thr-Glu-Lys-Lys-Arg-Arg-Glu-Thr-Val-Glu-Arg-Glu-Lys-Glu (GEPON) that mimics the ezrin protein hinge region was studied in dextran sodium sulphate-induced murine experimental colitis (DSS colitis). We report that GEPON intraperitoneal injections significantly attenuated DSS-induced pathological manifestations in the large intestine, bloody diarrhoea, and body weight loss in C57BL/6 mice. GEPON markedly inhibited the transcription rate of pro-inflammatory Il1b, Il6, and Nos2 genes in the colon tissue, in contrast with those encoding anti-inflammatory factors, such as Tgfb1, I10, and Arg1, whose transcription rate did not change significantly. Using flow cytometry, we found that GEPON treatment significantly reduced the accumulation of Ly6G+ granulocytes and Ly6C+ monocytes in the colon infiltrate of DSS colitis mice. Analysis of the mRNA level in myeloid cells sorted from the colon tissue revealed that GEPON had decreased the expression of pro-inflammatory genes in both colon-infiltrating Ly6G+ granulocytes and Ly6C+ monocytes, but not in Ly6C-CD64+ macrophages of DSS-treated mice. The direct anti-inflammatory impact of GEPON was shown in an in vitro culture of Ly6C+ monocytes, as evidenced by an inhibition of IL-1 beta and IL-6 mRNA expression. Taken together, our results demonstrated that GEPON had a pronounced therapeutic effect on ulcerative colitis in a laboratory mice model and provided evidence of its curative efficacy via inhibition of colon tissue inflammation by decreasing Ly6G+ granulocyte and Ly6C+ monocyte infiltration and by reducing their pro-inflammatory activities.
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Affiliation(s)
- M M Chulkina
- National Research Center - Institute of Immunology, Federal Medical-Biological Agency of Russia, Moscow, Russia.
| | - A V Pichugin
- National Research Center - Institute of Immunology, Federal Medical-Biological Agency of Russia, Moscow, Russia
| | - R I Ataullakhanov
- National Research Center - Institute of Immunology, Federal Medical-Biological Agency of Russia, Moscow, Russia.
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55
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Dulari Jayawardena, Arivarasu N Anbazhagan, Priyamvada S, Kumar A, Saksena S, Onyuksel H, Pradeep K Dudeja. Colonic delivery of vasoactive intestinal peptide nanomedicine alleviates colitis and shows promise as an oral capsule. Nanomedicine (Lond) 2020; 15:2459-2474. [PMID: 32975467 DOI: 10.2217/nnm-2020-0280] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Aim: To evaluate the efficacy of locally delivered nanomedicine, vasoactive intestinal peptide in sterically stabilized micelles (VIP-SSM) to the colon and conduct in vitro release studies of a potential oral formulation. Materials & methods: Intracolonic instillation of VIP-SSM was tested in a mouse model of dextran sulfate sodium-induced colitis. Based on the effective mouse dose, human equivalent dose containing nanomedicine powder was filled into enteric coated capsules for in vitro release testing. Results: Colonic delivery of VIP-SSM significantly alleviated colitis. VIP-SSM containing capsules completely dissolved at colonic pH allowing micelles to reform with active VIP. Capsule formulations exhibited reproducible release profiles when stored up to 6 weeks demonstrating stability. Conclusion: VIP-SSM is an effective nanomedicine formulation which appears to have potential for oral treatment of colitis in humans. [Formula: see text].
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Affiliation(s)
- Dulari Jayawardena
- Department of Medicine, College of Medicine, University of Illinois at Chicago, IL 60612, USA.,Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, IL 60612, USA
| | - Arivarasu N Anbazhagan
- Department of Medicine, College of Medicine, University of Illinois at Chicago, IL 60612, USA
| | - Shubha Priyamvada
- Department of Medicine, College of Medicine, University of Illinois at Chicago, IL 60612, USA
| | - Anoop Kumar
- Department of Medicine, College of Medicine, University of Illinois at Chicago, IL 60612, USA.,Jesse Brown VA Medical Center, Chicago, IL 60612, USA
| | - Seema Saksena
- Department of Medicine, College of Medicine, University of Illinois at Chicago, IL 60612, USA.,Jesse Brown VA Medical Center, Chicago, IL 60612, USA
| | - Hayat Onyuksel
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, IL 60612, USA
| | - Pradeep K Dudeja
- Department of Medicine, College of Medicine, University of Illinois at Chicago, IL 60612, USA.,Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, IL 60612, USA.,Jesse Brown VA Medical Center, Chicago, IL 60612, USA
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56
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Zhang W, Zou G, Li B, Du X, Sun Z, Sun Y, Jiang X. Fecal Microbiota Transplantation (FMT) Alleviates Experimental Colitis in Mice by Gut Microbiota Regulation. J Microbiol Biotechnol 2020; 30:1132-1141. [PMID: 32423189 PMCID: PMC9728197 DOI: 10.4014/jmb.2002.02044] [Citation(s) in RCA: 91] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Accepted: 05/10/2020] [Indexed: 12/15/2022]
Abstract
Inflammatory bowel disease (IBD) is an increasing global burden and a predisposing factor to colorectal cancer. Although a number of treatment options are available, the side effects could be considerable. Studies on fecal microbiota transplantation (FMT) as an IBD intervention protocol require further validation as the underlying mechanisms for its attenuating effects remain unclear. This study aims to demonstrate the ameliorative role of FMT in an ulcerative colitis (UC) model induced by dextran sulfate sodium (DSS) and elucidate its relative mechanisms in a mouse model. It was shown that FMT intervention decreased disease activity index (DAI) levels and increased the body weight, colon weight and colon length of experimental animals. It also alleviated histopathological changes, reduced key cytokine expression and oxidative status in the colon. A down-regulated expression level of genes associated with NF-κB signaling pathway was also observed. The results of 16S rRNA gene sequencing showed that FMT intervention restored the gut microbiota to the pattern of the control group by increasing the relative abundance of Firmicutes and decreasing the abundances of Bacteroidetes and Proteobacteria. The relative abundances of the genera Lactobacillus, Butyricicoccus, Lachnoclostridium, Olsenella and Odoribacter were upregulated but Helicobacter, Bacteroides and Clostridium were reduced after FMT administration. Furthermore, FMT administration elevated the concentrations of SCFAs in the colon. In conclusion, FMT intervention could be suitable for UC control, but further validations via clinical trials are recommended.
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Affiliation(s)
- Wanying Zhang
- Department of Clinical Laboratory, Fourth Affiliated Hospital of Harbin Medical University, 37 Yiyuan Street, Nangang District, Harbin 150001, P.R. China,Heilongjiang Longwei Precision Medical Laboratory Center, Longchuan Road, Songbei District, Harbin 150028, P.R. China
| | - Guiling Zou
- Department of Clinical Laboratory, Fourth Affiliated Hospital of Harbin Medical University, 37 Yiyuan Street, Nangang District, Harbin 150001, P.R. China,Heilongjiang Longwei Precision Medical Laboratory Center, Longchuan Road, Songbei District, Harbin 150028, P.R. China
| | - Bin Li
- Department of Clinical Laboratory, Fourth Affiliated Hospital of Harbin Medical University, 37 Yiyuan Street, Nangang District, Harbin 150001, P.R. China,Heilongjiang Longwei Precision Medical Laboratory Center, Longchuan Road, Songbei District, Harbin 150028, P.R. China
| | - Xuefei Du
- Department of Clinical Laboratory, Fourth Affiliated Hospital of Harbin Medical University, 37 Yiyuan Street, Nangang District, Harbin 150001, P.R. China,Heilongjiang Longwei Precision Medical Laboratory Center, Longchuan Road, Songbei District, Harbin 150028, P.R. China
| | - Zhe Sun
- Department of Clinical Laboratory, Fourth Affiliated Hospital of Harbin Medical University, 37 Yiyuan Street, Nangang District, Harbin 150001, P.R. China,Heilongjiang Longwei Precision Medical Laboratory Center, Longchuan Road, Songbei District, Harbin 150028, P.R. China
| | - Yu Sun
- Department of Clinical Laboratory, Fourth Affiliated Hospital of Harbin Medical University, 37 Yiyuan Street, Nangang District, Harbin 150001, P.R. China,Heilongjiang Longwei Precision Medical Laboratory Center, Longchuan Road, Songbei District, Harbin 150028, P.R. China
| | - Xiaofeng Jiang
- Department of Clinical Laboratory, Fourth Affiliated Hospital of Harbin Medical University, 37 Yiyuan Street, Nangang District, Harbin 150001, P.R. China,Heilongjiang Longwei Precision Medical Laboratory Center, Longchuan Road, Songbei District, Harbin 150028, P.R. China,Corresponding author Phone: +86-0451-85716079 Fax: +86-0451-85716079 E-mail:
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57
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Leon-Coria A, Kumar M, Workentine M, Moreau F, Surette M, Chadee K. Muc2 Mucin and Nonmucin Microbiota Confer Distinct Innate Host Defense in Disease Susceptibility and Colonic Injury. Cell Mol Gastroenterol Hepatol 2020; 11:77-98. [PMID: 32659381 PMCID: PMC7596264 DOI: 10.1016/j.jcmgh.2020.07.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Revised: 07/03/2020] [Accepted: 07/07/2020] [Indexed: 12/22/2022]
Abstract
BACKGROUND & AIMS Alterations in intestinal MUC2 mucin and microbial diversity are closely linked with important intestinal pathologies; however, their impact on each other and on intestinal pathogenesis has been vaguely characterized. Therefore, it was of interest in this study to delineate distinct and cooperative function of commensal microbiota and the Muc2 mucus barrier in maintaining intestinal epithelial barrier function. METHODS Muc2 mucin deficient (Muc2-/-) and sufficient (Muc2+/+) littermates were used as a model for assessing the role of Muc2. To quantify the role of the microbiota in disease pathogenesis, Muc2+/+ and Muc2-/- littermates were treated with a cocktail of antibiotics that reduced indigenous bacteria, and then fecal transplanted with littermate stool and susceptibility to dextran sulphate sodium (DSS) quantified. RESULTS Although, Muc2+/+ and Muc2-/- littermates share similar phyla distribution as evidenced by 16S sequencing they maintain their distinctive gastrointestinal phenotypes. Basally, Muc2-/- showed low-grade colonic inflammation with high populations of inflammatory and tolerogenic immune cells that became comparable to Muc2+/+ littermates following antibiotic treatment. Antibiotics treatment rendered Muc2+/+ but not Muc2-/- littermates highly susceptibility to DSS-induced colitis that was ILC3 dependent. Muc2-/- microbiota was colitogenic to Muc2+/+ as it worsened DSS-induced colitis. Microbiota dependent inflammation was confirmed by bone-marrow chimera studies, as Muc2-/- receiving Muc2+/+ bone marrow showed no difference in their susceptibility toward DSS induced colitis. Muc2-/- microbiota exhibited presence of characteristic OTUs of specific bacterial populations that were transferrable to Muc2+/+ littermates. CONCLUSIONS These results highlight a distinct role for Muc2 mucin in maintenance of healthy microbiota critical in shaping innate host defenses to promote intestinal homeostasis.
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Affiliation(s)
- Aralia Leon-Coria
- Department of Microbiology, Immunology and Infectious Diseases, University of Calgary Health Sciences Centre, Calgary, Alberta, Canada
| | - Manish Kumar
- Department of Microbiology, Immunology and Infectious Diseases, University of Calgary Health Sciences Centre, Calgary, Alberta, Canada
| | - Matthew Workentine
- Department of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada
| | - France Moreau
- Department of Microbiology, Immunology and Infectious Diseases, University of Calgary Health Sciences Centre, Calgary, Alberta, Canada
| | - Michael Surette
- Department of Microbiology, Immunology and Infectious Diseases, University of Calgary Health Sciences Centre, Calgary, Alberta, Canada; Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Ontario, Canada
| | - Kris Chadee
- Department of Microbiology, Immunology and Infectious Diseases, University of Calgary Health Sciences Centre, Calgary, Alberta, Canada.
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58
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Han Q, Tang HZ, Zou M, Zhao J, Wang L, Bian ZX, Li YH. Anti-inflammatory Efficacy of Combined Natural Alkaloid Berberine and S1PR Modulator Fingolimod at Low Doses in Ulcerative Colitis Preclinical Models. JOURNAL OF NATURAL PRODUCTS 2020; 83:1939-1949. [PMID: 32432470 DOI: 10.1021/acs.jnatprod.0c00175] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The natural alkaloid berberine is being studied as a drug candidate for the treatment of ulcerative colitis (UC). Fingolimod is an immunomodulator approved for the treatment of multiple sclerosis. Whether fingolimod use can be extended to UC and how it interacts with berberine remain unclear. In the present study, the anti-inflammatory efficacies of berberine, fingolimod, and a combination of half-doses of them was examined in mice with dextran sulfate sodium-induced colitis. In mice with subchronic colitis, 14-day oral administration of fingolimod had greater efficacy than berberine in ameliorating the disease clinical severity and colon shortening. However, in mice with chronic colitis, 30-day oral administration of berberine was more effective than fingolimod except on splenic swelling. Notably, the combination of half-doses of each drug was equally effective as the superior single drugs for two models and resulted in reduced splenic swelling in the chronic colitis model. The inhibition of cytokine expression and STAT3 activation, as well as binding to the sphingosine 1-phosphate receptor by both drugs, contributed to the combination efficacy. Our findings suggest that fingolimod in combination with berberine at reduced doses represents a novel therapy for UC that attains satisfactory efficacy with reduced potentials for adverse effects.
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Affiliation(s)
- Qian Han
- School of Medicine, South China University of Technology, Guangzhou 510641, China
| | - Hua-Zheng Tang
- School of Medicine, South China University of Technology, Guangzhou 510641, China
| | - Min Zou
- School of Medicine, South China University of Technology, Guangzhou 510641, China
| | - Jie Zhao
- School of Medicine, South China University of Technology, Guangzhou 510641, China
| | - Ling Wang
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510641, China
| | - Zhao-Xiang Bian
- Lab of Brain and Gut Research, Hong Kong Chinese Medicine Research Center, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China
| | - Yan-Hong Li
- School of Medicine, South China University of Technology, Guangzhou 510641, China
- Division of Clinical Pharmacology, Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic, Rochester, Minnesota 55905, United States
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59
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Chen Y, Shan T, Qu H, Chen Y, Wang N, Xia J. Inhibition of miR-16 Ameliorates Inflammatory Bowel Disease by Modulating Bcl-2 in Mouse Models. J Surg Res 2020; 253:185-192. [PMID: 32361613 DOI: 10.1016/j.jss.2020.03.037] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2019] [Revised: 02/19/2020] [Accepted: 03/08/2020] [Indexed: 12/22/2022]
Abstract
BACKGROUND In recent years, microRNA (miRNA) is considered as a potential therapy target. To study the regulatory mechanism and therapeutic effect of miRNAs on inflammatory bowel disease (IBD), we investigated microRNAs that regulate apoptosis-related protein B cell lymphoma-2 (Bcl-2). We examined the role of miR-16 in IBD and the effect of inhibiting the expression of miR-16 on disease progression. MATERIALS AND METHODS Dextran sulfate sodium was used to induce ulcerative colitis in mice. RNA and protein were extracted from the rectal mucosa of mice. Real-time quantitative polymerase chain reaction and Western blotting were used to detect the expression of miR-16 and Bcl-2. The effects of miR-16 on intestinal mucosal immunity were studied by real-time quantitative polymerase chain reaction, and inflammatory factors such as interleukin-1β, interleukin-6, and tumor necrosis factor-α were detected. The weight changes, disease activity index, length of the rectal colon, and pathological score of the mice were used to evaluate the effect of inhibiting miR-16 on disease progression. Through the establishment of overexpression and low expression cell lines of miR-16, the regulation of miR-16 on Bcl-2 was studied. RESULTS MiR-16 was overexpressed in the IBD model, whereas Bcl-2 had lower expression in the mucosa. Inhibiting expression of miR-16 significantly decreased the expression of interleukin-1β, interleukin-6, and tumor necrosis factor-α. In mice, the weight change, disease activity index, and pathological score decreased in the experimental group, in which miR-16 was inhibited. High expression of miR-16 can inhibit Bcl-2 expression. CONCLUSIONS MiR-16 plays a critical role in IBD via Bcl-2 and is a promising target in IBD therapy.
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Affiliation(s)
- Ye Chen
- Department of General Surgery and Center of Translational Medicine, The Affiliated Wuxi No.2 People's Hospital of Nanjing Medical University, China
| | - Ting Shan
- Department of General Surgery and Center of Translational Medicine, The Affiliated Wuxi No.2 People's Hospital of Nanjing Medical University, China
| | - Huiheng Qu
- Department of General Surgery and Center of Translational Medicine, The Affiliated Wuxi No.2 People's Hospital of Nanjing Medical University, China
| | - Yigang Chen
- Department of General Surgery and Center of Translational Medicine, The Affiliated Wuxi No.2 People's Hospital of Nanjing Medical University, China
| | - Ning Wang
- Department of General Surgery and Center of Translational Medicine, The Affiliated Wuxi No.2 People's Hospital of Nanjing Medical University, China
| | - Jiazeng Xia
- Department of General Surgery and Center of Translational Medicine, The Affiliated Wuxi No.2 People's Hospital of Nanjing Medical University, China.
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60
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β-Carotene exerts anti-colon cancer effects by regulating M2 macrophages and activated fibroblasts. J Nutr Biochem 2020; 82:108402. [PMID: 32450500 DOI: 10.1016/j.jnutbio.2020.108402] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 04/16/2020] [Accepted: 04/17/2020] [Indexed: 12/19/2022]
Abstract
The tumor microenvironment (TME), consisting of stromal fibroblasts, immune cells, cancer cells and other cell types, plays a crucial role in cancer progression and metastasis. M2 macrophages and activated fibroblasts (AFs) modulate behavior of cancer cells in the TME. Since nutritional effects on cancer progression, including colorectal cancer (CRC), may be mediated by alterations in the TME, we determined the ability of β-carotene (BC) to mediate anti-cancer effects through regulation of macrophage polarization and fibroblast activation in CRC. The M2 macrophage phenotype was induced by treating U937 cells with phorbol-12-myristate-13-acetate and interleukin (IL)-4. Treatment of these M2 macrophages with BC led to suppression of M2-type macrophage-associated markers and of the IL-6/STAT3 signaling pathway. In separate experiments, AFs were induced by treating CCD-18Co cells with transforming growth factor-β1. BC treatment suppressed expression of fibroblast activation markers. In addition, conditioned media from BC-treated M2 macrophages and AF inhibited cancer stem cell markers, colon cancer cell invasiveness and migration, and the epithelial-mesenchymal transition (EMT). In vivo, BC supplementation inhibited tumor formation and the expression of M2 macrophage markers in an azoxymethane/dextran sodium sulfate-induced colitis-associated CRC mouse model. To our knowledge, the present findings provide the first evidence suggesting that the potential therapeutic effects of BC on CRC are mediated by the inhibition of M2 macrophage polarization and fibroblast activation.
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61
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Liu G, Baird AW, Parsons MJ, Fan K, Skerrett-Byrne DA, Nair PM, Makanyengo S, Chen J, Neal R, Goggins BJ, Tay H, Mathe A, Soh WS, Minahan K, Hansbro PM, Nixon B, McCaughan GW, Holtmann G, Colgan SP, Keely S. Platelet activating factor receptor acts to limit colitis-induced liver inflammation. FASEB J 2020; 34:7718-7732. [PMID: 32293760 DOI: 10.1096/fj.201901779r] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 03/25/2020] [Accepted: 03/25/2020] [Indexed: 12/31/2022]
Abstract
Liver inflammation is a common extraintestinal manifestation in inflammatory bowel disease (IBD), yet, the mechanisms driving gut-liver axis inflammation remain poorly understood. IBD leads to a breakdown in the integrity of the intestinal barrier causing an increase in portal and systemic gut-derived antigens, which challenge the liver. Here, we examined the role of platelet activating factor receptor (PAFR) in colitis-associated liver damage using dextran sulfate sodium (DSS) and anti-CD40-induced colitis models. Both DSS and anti-CD40 models exhibited liver inflammation associated with colitis. Colitis reduced global PAFR protein expression in mouse livers causing an exclusive re-localization of PAFR to the portal triad. The global decrease in liver PAFR was associated with increased sirtuin 1 while relocalized PAFR expression was limited to Kupffer cells (KCs) and co-localized with toll-like receptor 4. DSS activated the NLRP3-inflammasome and increased interleukin (IL)-1β in the liver. Antagonism of PAFR amplified the inflammasome response by increasing NLRP3, caspase-1, and IL-1β protein levels in the liver. LPS also increased NLRP3 response in human hepatocytes, however, overexpression of PAFR restored the levels of NLPR3 and caspase-1 proteins. Interestingly, KCs depletion also increased IL-1β protein in mouse liver after DSS challenge. These data suggest a protective role for PAFR-expressing KCs during colitis and that regulation of PAFR is important for gut-liver axis homeostasis.
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Affiliation(s)
- Gang Liu
- Priority Research Centre for Digestive Health and Neurogastroenterology, The University of Newcastle, Newcastle, NSW, Australia.,Hunter Medical Research Institute, New Lambton Heights, NSW, Australia.,School of Biomedical Sciences and Pharmacy, Faculty of Health and Medicine, The University of Newcastle, Callaghan, NSW, Australia.,School of Life Science, Faculty of Science, University of Technology Sydney, Ultimo, NSW, Australia.,Centre for Inflammation, Centenary Institute, Camperdown, NSW, Australia
| | - Alan W Baird
- UCD School of Veterinary Medicine, University College Dublin, Dublin, Ireland
| | - Marie J Parsons
- Priority Research Centre for Digestive Health and Neurogastroenterology, The University of Newcastle, Newcastle, NSW, Australia.,Hunter Medical Research Institute, New Lambton Heights, NSW, Australia.,School of Biomedical Sciences and Pharmacy, Faculty of Health and Medicine, The University of Newcastle, Callaghan, NSW, Australia
| | - Kening Fan
- Priority Research Centre for Digestive Health and Neurogastroenterology, The University of Newcastle, Newcastle, NSW, Australia.,Hunter Medical Research Institute, New Lambton Heights, NSW, Australia.,School of Biomedical Sciences and Pharmacy, Faculty of Health and Medicine, The University of Newcastle, Callaghan, NSW, Australia
| | - David A Skerrett-Byrne
- Hunter Medical Research Institute, New Lambton Heights, NSW, Australia.,School of Environmental and Life Sciences, Priority Research Centre for Reproductive Science, The University of Newcastle, Callaghan, NSW, Australia
| | - Prema M Nair
- Priority Research Centre for Digestive Health and Neurogastroenterology, The University of Newcastle, Newcastle, NSW, Australia.,Hunter Medical Research Institute, New Lambton Heights, NSW, Australia.,School of Biomedical Sciences and Pharmacy, Faculty of Health and Medicine, The University of Newcastle, Callaghan, NSW, Australia
| | - Samwel Makanyengo
- Priority Research Centre for Digestive Health and Neurogastroenterology, The University of Newcastle, Newcastle, NSW, Australia.,Hunter Medical Research Institute, New Lambton Heights, NSW, Australia.,School of Biomedical Sciences and Pharmacy, Faculty of Health and Medicine, The University of Newcastle, Callaghan, NSW, Australia
| | - Jinbiao Chen
- Liver Injury and Cancer Program, Centenary Research Institute, Camperdown, NSW, Australia.,Sydney Medical School, University of Sydney, Sydney, NSW, Australia
| | - Rachel Neal
- Priority Research Centre for Digestive Health and Neurogastroenterology, The University of Newcastle, Newcastle, NSW, Australia.,Hunter Medical Research Institute, New Lambton Heights, NSW, Australia.,School of Biomedical Sciences and Pharmacy, Faculty of Health and Medicine, The University of Newcastle, Callaghan, NSW, Australia
| | - Bridie J Goggins
- Priority Research Centre for Digestive Health and Neurogastroenterology, The University of Newcastle, Newcastle, NSW, Australia.,Hunter Medical Research Institute, New Lambton Heights, NSW, Australia.,School of Biomedical Sciences and Pharmacy, Faculty of Health and Medicine, The University of Newcastle, Callaghan, NSW, Australia
| | - Hock Tay
- Hunter Medical Research Institute, New Lambton Heights, NSW, Australia.,School of Biomedical Sciences and Pharmacy, Faculty of Health and Medicine, The University of Newcastle, Callaghan, NSW, Australia.,Priority Research Centre for Healthy Lungs, The University of Newcastle, Newcastle, NSW, Australia
| | - Andrea Mathe
- Priority Research Centre for Digestive Health and Neurogastroenterology, The University of Newcastle, Newcastle, NSW, Australia.,Hunter Medical Research Institute, New Lambton Heights, NSW, Australia.,School of Biomedical Sciences and Pharmacy, Faculty of Health and Medicine, The University of Newcastle, Callaghan, NSW, Australia
| | - Wai S Soh
- Priority Research Centre for Digestive Health and Neurogastroenterology, The University of Newcastle, Newcastle, NSW, Australia.,Hunter Medical Research Institute, New Lambton Heights, NSW, Australia.,School of Biomedical Sciences and Pharmacy, Faculty of Health and Medicine, The University of Newcastle, Callaghan, NSW, Australia
| | - Kyra Minahan
- Priority Research Centre for Digestive Health and Neurogastroenterology, The University of Newcastle, Newcastle, NSW, Australia.,Hunter Medical Research Institute, New Lambton Heights, NSW, Australia.,School of Biomedical Sciences and Pharmacy, Faculty of Health and Medicine, The University of Newcastle, Callaghan, NSW, Australia
| | - Phil M Hansbro
- School of Life Science, Faculty of Science, University of Technology Sydney, Ultimo, NSW, Australia.,Centre for Inflammation, Centenary Institute, Camperdown, NSW, Australia
| | - Brett Nixon
- Hunter Medical Research Institute, New Lambton Heights, NSW, Australia.,School of Environmental and Life Sciences, Priority Research Centre for Reproductive Science, The University of Newcastle, Callaghan, NSW, Australia
| | - Geoffrey W McCaughan
- Liver Injury and Cancer Program, Centenary Research Institute, Camperdown, NSW, Australia.,Sydney Medical School, University of Sydney, Sydney, NSW, Australia
| | - Gerald Holtmann
- Department of Gastroenterology and Hepatology, Princess Alexandra Hospital, Woolloongabba, QLD, Australia.,Faculty of Medicine, The University of Queensland, Woolloongabba, QLD, Australia
| | - Sean P Colgan
- University of Colorado Denver, Anschutz Medical Campus, Aurora, CO, USA
| | - Simon Keely
- Priority Research Centre for Digestive Health and Neurogastroenterology, The University of Newcastle, Newcastle, NSW, Australia.,Hunter Medical Research Institute, New Lambton Heights, NSW, Australia.,School of Biomedical Sciences and Pharmacy, Faculty of Health and Medicine, The University of Newcastle, Callaghan, NSW, Australia
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TGR5 Protects Against Colitis in Mice, but Vertical Sleeve Gastrectomy Increases Colitis Severity. Obes Surg 2020; 29:1593-1601. [PMID: 30623320 DOI: 10.1007/s11695-019-03707-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
BACKGROUND AND AIMS Bariatric surgery, such as vertical sleeve gastrectomy (VSG), is the most effective long-term treatment for obesity. However, there are conflicting reports on the effect of bariatric surgery on inflammatory bowel disease (IBD). Bariatric surgery increases bile acid concentrations, which can decrease inflammation by signaling through the bile acid receptor, TGR5. TGR5 signaling protects against chemically induced colitis in mice. VSG increases circulating bile acid concentrations to increase TGR5 signaling, which contributes to improved metabolic regulation after VSG. Therefore, we investigated the effect of VSG on chemically induced colitis development and the role of TGR5 in this context. METHODS VSG or sham surgery was performed in high fat diet-fed male Tgr5+/+ and Tgr5-/- littermates. Sham-operated mice were food restricted to match their body weight to VSG-operated mice. Colitis was induced with 2.5% dextran sodium sulfate (DSS) in water post-operatively. Body weight, energy intake, fecal scoring, colon histopathology, colonic markers of inflammation, goblet cell counts, and colonic microRNA-21 levels were assessed. RESULTS VSG decreased body weight independently of genotype. Consistent with previous work, genetic ablation of TGR5 increased the severity of DSS-induced colitis. Notably, despite the effect of VSG to decrease body weight and increase TGR5 signaling, VSG increased the severity of DSS-induced colitis. VSG-induced increases in colitis were associated with increased colonic expression of TNF-α, IL-6, MCP-1, and microRNA-21. CONCLUSIONS While our data demonstrate that TGR5 protects against colitis, they also demonstrate that VSG potentiates chemically induced colitis in mice. These data suggest that individuals undergoing VSG may be at increased risk for developing colitis; however, further study is needed.
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Kazakevych J, Denizot J, Liebert A, Portovedo M, Mosavie M, Jain P, Stellato C, Fraser C, Corrêa RO, Célestine M, Mattiuz R, Okkenhaug H, Miller JR, Vinolo MAR, Veldhoen M, Varga-Weisz P. Smarcad1 mediates microbiota-induced inflammation in mouse and coordinates gene expression in the intestinal epithelium. Genome Biol 2020; 21:64. [PMID: 32160911 PMCID: PMC7065452 DOI: 10.1186/s13059-020-01976-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Accepted: 02/25/2020] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND How intestinal epithelial cells interact with the microbiota and how this is regulated at the gene expression level are critical questions. Smarcad1 is a conserved chromatin remodeling factor with a poorly understood tissue function. As this factor is highly expressed in the stem and proliferative zones of the intestinal epithelium, we explore its role in this tissue. RESULTS Specific deletion of Smarcad1 in the mouse intestinal epithelium leads to colitis resistance and substantial changes in gene expression, including a striking increase of expression of several genes linked to innate immunity. Absence of Smarcad1 leads to changes in chromatin accessibility and significant changes in histone H3K9me3 over many sites, including genes that are differentially regulated upon Smarcad1 deletion. We identify candidate members of the gut microbiome that elicit a Smarcad1-dependent colitis response, including members of the poorly understood TM7 phylum. CONCLUSIONS Our study sheds light onto the role of the chromatin remodeling machinery in intestinal epithelial cells in the colitis response and shows how a highly conserved chromatin remodeling factor has a distinct role in anti-microbial defense. This work highlights the importance of the intestinal epithelium in the colitis response and the potential of microbial species as pharmacological and probiotic targets in the context of inflammatory diseases.
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Affiliation(s)
- Juri Kazakevych
- Nuclear Dynamics, Babraham Institute, Cambridge, CB22 3AT, UK
| | - Jérémy Denizot
- Nuclear Dynamics, Babraham Institute, Cambridge, CB22 3AT, UK.,Present Address: Université Clermont Auvergne, Inserm U1071, INRA USC2018, M2iSH, F-63000, Clermont-Ferrand, France
| | - Anke Liebert
- Nuclear Dynamics, Babraham Institute, Cambridge, CB22 3AT, UK.,Present Address: The Francis Crick Institute, London, NW1 1AT, UK
| | - Mariana Portovedo
- Laboratory of Immunoinflammation, Institute of Biology, UNICAMP, Campinas, 13083-862, Brazil
| | - Mia Mosavie
- School of Biological Sciences, University of Essex, Colchester, CO4 3SQ, UK
| | - Payal Jain
- Nuclear Dynamics, Babraham Institute, Cambridge, CB22 3AT, UK
| | | | - Claire Fraser
- Nuclear Dynamics, Babraham Institute, Cambridge, CB22 3AT, UK
| | - Renan Oliveira Corrêa
- Laboratory of Immunoinflammation, Institute of Biology, UNICAMP, Campinas, 13083-862, Brazil
| | | | - Raphaël Mattiuz
- Nuclear Dynamics, Babraham Institute, Cambridge, CB22 3AT, UK
| | | | - J Ross Miller
- Nuclear Dynamics, Babraham Institute, Cambridge, CB22 3AT, UK
| | | | - Marc Veldhoen
- Lymphocyte Signalling and Development, Babraham Institute, Cambridge, CB22 3AT, UK.,Present Address: Instituto de Medicina Molecular
- Joâo Lobo Antunes, Faculdade de Medicina da Universidade de Lisboa, 1649-028, Lisbon, Portugal
| | - Patrick Varga-Weisz
- Nuclear Dynamics, Babraham Institute, Cambridge, CB22 3AT, UK. .,School of Biological Sciences, University of Essex, Colchester, CO4 3SQ, UK.
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64
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Zhao Y, Luan H, Gao H, Wu X, Zhang Y, Li R. Gegen Qinlian decoction maintains colonic mucosal homeostasis in acute/chronic ulcerative colitis via bidirectionally modulating dysregulated Notch signaling. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2020; 68:153182. [PMID: 32065953 DOI: 10.1016/j.phymed.2020.153182] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 01/07/2020] [Accepted: 02/05/2020] [Indexed: 06/10/2023]
Abstract
BACKGROUND Gegen Qinlian decoction (GQ) is a well-known traditional Chinese medicine that has been clinically proven to be effective in treating ulcerative colitis (UC). However, its therapeutic mechanism has not been fully elucidated. Notch signaling plays an essential role in the regeneration of the intestinal epithelium. PURPOSE This study was designed to ascertain the mechanism by which GQ participates in the recovery of the colonic mucosa by regulating Notch signaling in acute and chronic UC models. METHODS Acute and chronic UC mice (C57BL/6) were established with 3 and 2% dextran sulfate sodium (DSS), respectively, and treated with oral administration of GQ. The expression of the Notch target gene Hes1 and the Notch-related proteins RBP-J, MAML and Math1 was analyzed by western blotting. PTEN mRNA levels were detected by qRT-PCR. Mucin production that is characteristic of goblet cells was determined by Alcian blue/periodic acid-Schiff staining and verified by examining MUC2 mRNA levels by qRT-PCR. Cell proliferation was assayed by immunohistochemistry analysis of Ki67. HT-29 and FHC cells and Toll-like receptor 4 knockout (TLR4-/-) acute UC mice were also used in this study. RESULTS GQ restored the injured colonic mucosa in both acute and chronic UC models. We found that Notch signaling was hyperactive in acute UC mice and hypoactive in chronic UC mice. GQ downregulated Hes1, RBP-J and MAML proteins and augmented goblet cells in the acute UC models, whereas GQ upregulated Hes1, RBP-J and MAML proteins in chronic UC mice, reducing goblet cell differentiation and promoting crypt base columnar (CBC) stem cell proliferation. Hes1 mRNA was suppressed in TLR4-/- UC mice, and GQ treatment reversed this effect. In vitro, GQ reduced Hes1 protein in Notch-activated HT29 and FHC cells but increased Hes1 protein in Notch-inhibited cells. CONCLUSIONS GQ restored the colonic epithelium by maintaining mucosal homeostasis via bidirectional regulation of Notch signaling in acute/chronic UC models.
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Affiliation(s)
- Yaxing Zhao
- State Key Laboratory of Natural Medicines, Department of Biochemistry, China Pharmaceutical University, 24 Tongjia Xiang, Nanjing 210009, China
| | - Haofan Luan
- State Key Laboratory of Natural Medicines, Department of Biochemistry, China Pharmaceutical University, 24 Tongjia Xiang, Nanjing 210009, China
| | - Hui Gao
- State Key Laboratory of Natural Medicines, Department of Biochemistry, China Pharmaceutical University, 24 Tongjia Xiang, Nanjing 210009, China
| | - Xiaojun Wu
- Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Yubin Zhang
- State Key Laboratory of Natural Medicines, Department of Biochemistry, China Pharmaceutical University, 24 Tongjia Xiang, Nanjing 210009, China.
| | - Ruiyan Li
- State Key Laboratory of Natural Medicines, Department of Biochemistry, China Pharmaceutical University, 24 Tongjia Xiang, Nanjing 210009, China.
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Fan X, Ding X, Zhang QY. Hepatic and intestinal biotransformation gene expression and drug disposition in a dextran sulfate sodium-induced colitis mouse model. Acta Pharm Sin B 2020; 10:123-135. [PMID: 31993311 PMCID: PMC6976992 DOI: 10.1016/j.apsb.2019.12.002] [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: 08/31/2019] [Revised: 10/31/2019] [Accepted: 11/07/2019] [Indexed: 12/27/2022] Open
Abstract
We examined the impact of gut inflammation on the expression of cytochrome P450 (P450) and other biotransformation genes in male mice using a dextran sulfate sodium (DSS)-induced colitis model. Several P450 isoforms, including CYP1A, CYP2B, CYP2C, and CYP3A, were down-regulated, accompanied by decreases in microsomal metabolism of diclofenac and nifedipine, in the liver and small intestine. The impact of the colitis on in vivo clearance of oral drugs varied for four different drugs tested: a small decrease for nifedipine, a relatively large decrease for lovastatin, but no change for pravastatin, and a large decrease in the absorption of cyclosporine A. To further assess the scope of influence of gut inflammation on gene expression, we performed genome-wide expression analysis using RNA-seq, which showed down-regulation of many CYPs, non-CYP phase-I enzymes, phase-II enzymes and transporters, and up-regulation of many other members of these gene families, in both liver and intestine of adult C57BL/6 mice, by DSS-induced colitis. Overall, our results indicate that gut inflammation suppresses the expression of many P450s and other biotransformation genes in the intestine and liver, and alters the pharmacokinetics for some but not all drugs, potentially affecting therapeutic efficacy or causing adverse effects in a drug-specific fashion.
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66
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Yang M, Bose S, Lim SK, Kim H. Preventive Effects of Pyungwi-san against Dextran Sulfate Sodium- and Clostridium difficile-Induced Inflammatory Bowel Disease in Mice. Int J Mol Sci 2019; 20:ijms20246346. [PMID: 31888274 PMCID: PMC6940993 DOI: 10.3390/ijms20246346] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 12/10/2019] [Accepted: 12/11/2019] [Indexed: 12/20/2022] Open
Abstract
Several lines of evidence indicate that inflammatory bowel disease (IBD) is associated with Clostridium difficile (CD) infection as a consequence of gut dysbiosis. Currently available treatments of IBD are either not very effective or have adverse effects. Pyungwi-san (PWS), a traditional Chinese herbal formulation, has long been used to treat gastrointestinal disorders. The present study was conducted to investigate the efficacy of PWS against dextran sulfate sodium (DSS) + CD-induced IBD in mice. The animals received DSS in drinking water for seven days to produce DSS-induced acute colitis. In the DSS + CD group, the DSS-fed animals were orally administered with CD spores twice during the DSS treatment period. We observed that exposure of DSS + CD-treated animals to PWS significantly decreased the disease activity index; prevented the shortening of colonic length and increases in spleen size and weight; restored colonic histological parameters by significantly increasing mucus thickness, crypt depth, and goblet cell numbers; protected the tight junction proteins; improved the profiles of pro-inflammatory and anti-inflammatory cytokines; and normalized the abundance ratio of the Firmicutes/Bacteroidetes in the gut. Thus, PWS exerted a number of protective effects on DSS + CD-induced colitis, which might be mediated via restoration of a balance in gut microbial communities.
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Affiliation(s)
- Meng Yang
- Department of Rehabilitation Medicine of Korean Medicine, Dongguk University, 814 Siksa-dong, Ilsandong-gu, Goyang-si 10326, Korea; (M.Y.); (S.-K.L.)
| | - Shambhunath Bose
- Scientific Consultant Board, BexPharm Korea Healthcare Ltd. 51, Seongsui-ro, Seongdong-gu, Seoul 04781, Korea;
| | - Soo-Kyoung Lim
- Department of Rehabilitation Medicine of Korean Medicine, Dongguk University, 814 Siksa-dong, Ilsandong-gu, Goyang-si 10326, Korea; (M.Y.); (S.-K.L.)
| | - Hojun Kim
- Department of Rehabilitation Medicine of Korean Medicine, Dongguk University, 814 Siksa-dong, Ilsandong-gu, Goyang-si 10326, Korea; (M.Y.); (S.-K.L.)
- Correspondence: ; Tel.: +82-31-961-9111; Fax: +82-31-961-9009
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Dietary exposure to chlorpyrifos inhibits the polarization of regulatory T cells in C57BL/6 mice with dextran sulfate sodium-induced colitis. Arch Toxicol 2019; 94:141-150. [PMID: 31807802 DOI: 10.1007/s00204-019-02615-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Accepted: 11/06/2019] [Indexed: 12/16/2022]
Abstract
Inflammatory bowel disease (IBD) is associated with loss of immune tolerance to antigens originating from the diet and from the gut microflora. T cells play crucial roles in the pathogenesis of IBD. Chlorpyrifos (CPF) is one of the most ubiquitous organophosphate pesticides in the world. The aim of the study was to investigate the effects of dietary exposure to CPF on T-cell populations in C57BL/6 mice with dextran sulfate sodium (DSS)-induced colitis. Mice received distilled water containing 3% DSS for 6 days to induce acute colitis, which was then replaced with distilled water for 21 days, allowing progression to chronic inflammation. During the experimental period, mice were given either an AIN-93-based control diet or a CPF diet-containing 7, 17.5, or 35 ppm of CPF. Results showed that dietary exposure to CPF significantly increased circulating neutrophils in colitic mice. CPF-exposed groups had lower percentages of blood and spleen T cells without altering the proportions of CD4+ and CD8+ T-cell subsets. The percentage of blood regulatory T (Treg) cells, as well as splenic expressions of Treg-related genes, were suppressed in CPF-exposed mice. CPF upregulated the colonic gene expression of tumor necrosis factor-α. Meanwhile, plasma haptoglobin, colon weights, and luminal immunoglobulin G levels were higher in CPF-exposed groups. Histopathological analyses also observed that colon injury was more severe in all CPF-exposed mice. These results suggest that dietary exposure to CPF aggravated tissue injuries in mice with DSS-induced chronic colitis by suppressing T-cell populations and Treg polarization.
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68
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Kim E, Bae J, Lee J, Shin JH, Seok PR, Kim Y, Yoo SH. Purification and characterization of turanose, a sucrose isomer and its anti-inflammatory effects in dextran sulfate sodium (DSS)-induced colitis model. J Funct Foods 2019. [DOI: 10.1016/j.jff.2019.103570] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
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69
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Cinobufacini ameliorates experimental colitis via modulating the composition of gut microbiota. PLoS One 2019; 14:e0223231. [PMID: 31568499 PMCID: PMC6768468 DOI: 10.1371/journal.pone.0223231] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Accepted: 09/17/2019] [Indexed: 01/09/2023] Open
Abstract
Background Cinobufacini, the sterilized hot water extraction of dried toad skin, has been widely used in the treatment of inflammation and cancers. Recently we found cinobufacini could ameliorate dextran sulfate sodium (DSS)-induced colitis in mice, but the underlying mechanism was not fully understood. In current study, we explored the effect of cinobufacini on gut microbiota in DSS-induced acute colitic mouse model by pyrosequencing of colonic contents. Methods C57BL/6 mice were supplied with normal or 3.0% DSS containing drinking water. DSS-treat mice were gavaged daily either with vehicle (water) or cinobufacini (10.0 or 30.0 mg/kg) for 7 days. The composition of the gut microbiota was assessed by analyzing 16S rRNA gene sequences. Results Our data indicated that cinobufacini reversed DSS-induced gut dysbiosis and enhanced intestinal barrier integrity. Moreover, changing of some specific microbial groups such as Proteobacteria and Bacteroides was closely correlated with the re-establishment of intestinal equilibrium and the recovery of intestinal function. Conclusion Cinobufacini prevents colitis in mice by modifying the composition and function of gut microbiota. The current study provides additional mechanistic insight in the therapeutic effect of cinobufacini treatment and may pave the way for clinical application of cinobufacini in colitis therapy.
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70
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Blanchard EL, Argyropoulou D, Zurla C, Bhosle SM, Vanover D, Santangelo PJ. Quantification and Localization of Protein-RNA Interactions in Patient-Derived Archival Tumor Tissue. Cancer Res 2019; 79:5418-5431. [PMID: 31481502 DOI: 10.1158/0008-5472.can-19-1094] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 07/24/2019] [Accepted: 08/27/2019] [Indexed: 12/22/2022]
Abstract
Abnormal post-transcriptional regulation induced by alterations of mRNA-protein interactions is critical during tumorigenesis and cancer progression and is a hallmark of cancer cells. A more thorough understanding is needed to develop treatments and foresee outcomes. Cellular and mouse tumor models are insufficient for vigorous investigation as they lack consistency and translatability to humans. Moreover, to date, studies in human tumor tissue are predominately limited to expression analysis of proteins and mRNA, which do not necessarily provide information about the frequency of mRNA-protein interactions. Here, we demonstrate novel optimization of a method that is based on FISH and proximity ligation techniques to quantify mRNA interactions with RNA-binding proteins relevant for tumorigenesis and cancer progression in archival patient-derived tumor tissue. This method was validated for multiple mRNA-protein pairs in several cellular models and in multiple types of archival human tumor samples. Furthermore, this approach allowed high-throughput analysis of mRNA-protein interactions across a wide range of tumor types and stages through tumor microarrays. This method is quantitative, specific, and sensitive for detecting interactions and their localization at both the individual cell and whole-tissue scales with single interaction sensitivity. This work presents an important tool in investigating post-transcriptional regulation in cancer on a high-throughput scale, with great potential for translatability into any applications where mRNA-protein interactions are of interest. SIGNIFICANCE: This work presents an approach to sensitively, specifically, and quantitatively detect and localize native mRNA and protein interactions for analysis of abnormal post-transcriptional regulation in patient-derived archival tumor samples.
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Affiliation(s)
- Emmeline L Blanchard
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia
| | - Danae Argyropoulou
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia
| | - Chiara Zurla
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia
| | - Sushma M Bhosle
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia
| | - Daryll Vanover
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia
| | - Philip J Santangelo
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia
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Juritsch AF, Moreau R. Rapid removal of dextran sulfate sodium from tissue RNA preparations for measurement of inflammation biomarkers. Anal Biochem 2019; 579:18-24. [PMID: 31112717 DOI: 10.1016/j.ab.2019.05.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 05/14/2019] [Accepted: 05/15/2019] [Indexed: 12/17/2022]
Abstract
Dextran sulfate sodium (DSS) present in the tissues of DSS-treated laboratory animals inhibits quantitative real-time qPCR (RT-qPCR) and thus may be source of experimental errors. A recent systematic review concluded that the reporting of experimental method was insufficient in a majority of DSS studies and contributed to the poor reproducibility of experiments. Here we compared two DSS cleanup protocols applied to mouse tissue RNA preparations based on silica membrane spin column and lithium chloride precipitation. In absence of cleanup, exogenous DSS significantly inhibited reverse transcription and cDNA amplification at concentrations of 5 × 10-3 g/L and above during the quantification of IL8 mRNA levels in THP-1 macrophages. Silica membrane spin columns removed DSS from mouse RNA preparations and eliminated DSS-induced inhibition of qPCR. Mouse RNA isolated from DSS-treated tissues and purified with silica membrane spin columns was suitable for RT-qPCR and assessment of inflammatory biomarkers.
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Affiliation(s)
- Anthony F Juritsch
- Department of Nutrition & Health Sciences, University of Nebraska-Lincoln, Lincoln, NE 68583, USA
| | - Régis Moreau
- Department of Nutrition & Health Sciences, University of Nebraska-Lincoln, Lincoln, NE 68583, USA.
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72
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Sougiannis AT, VanderVeen BN, Enos RT, Velazquez KT, Bader JE, Carson M, Chatzistamou I, Walla M, Pena MM, Kubinak JL, Nagarkatti M, Carson JA, Murphy EA. Impact of 5 fluorouracil chemotherapy on gut inflammation, functional parameters, and gut microbiota. Brain Behav Immun 2019; 80:44-55. [PMID: 30807838 PMCID: PMC6660349 DOI: 10.1016/j.bbi.2019.02.020] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 01/30/2019] [Accepted: 02/20/2019] [Indexed: 12/13/2022] Open
Abstract
Emerging evidence suggests that gut microbiota may influence the response to chemotherapy. We sought to characterize the effects of 5 fluorouracil (5FU) chemotherapy on colon inflammation and functional measures in colorectal cancer (CRC) and to further determine whether gut microbiota can influence this response. 50 C57BL/6 were randomized into four groups; Control + Vehicle (n = 10), Control + 5FU (n = 10), AOM/DSS + Vehicle (n = 15), and AOM/DSS + 5FU (n = 15). CRC was induced chemically by a single 10 mg/kg injection of azoxymethane (AOM) followed by two cycles (2% and 1%) of dextran sodium sulfate (DSS). Mice were then treated with 3 cycles of vehicle or 5FU (cycle 1: 40 mg/kg, cycle 2 + 3: 20 mg/kg). Functional tests (grip strength and run-to-fatigue) were performed prior to 5FU treatment (baseline) and at the completion of the second cycle of 5FU. Following the third 5FU cycle, mice were euthanized and the colon was evaluated for expression of inflammatory genes using RT-qPCR and stool samples were profiled using 16S rRNA sequencing. A second experiment used fecal microbiota transplantation from 5FU treated mice to control mice (n = 10-15/group) to determine whether 5FU associated changes in the microbiota could influence functional measures and colon inflammation. 5FU reduced grip strength (p < 0.05) and caused a trending decrease in run-to-fatigue performance in cancer mice (p = 0.06). Select intestinal inflammatory genes were significantly elevated with 5FU treatment and this was further exacerbated with cancer (p < 0.05). Microbiota analysis revealed increased dissimilarity and alterations in bacterial taxonomy in 5FU and AOM/DSS-treated mice (p < 0.05). Fecal transplant from 5FU treated mice reduced functional performance (p < 0.05) and altered select colon inflammatory markers (p < 0.05). This study provides evidence of an effect of 5FU on inflammatory responses and functional measures in a mouse model of CRC and suggests that gut microbes may play a role in some, but not all, 5FU related perturbations.
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Affiliation(s)
- A T Sougiannis
- Department of Pathology, Microbiology, & Immunology, School of Medicine, University of South Carolina, SC 29209, USA
| | - B N VanderVeen
- Department of Exercise Science, School of Public Health, University of South Carolina, SC 29201, USA
| | - R T Enos
- Department of Pathology, Microbiology, & Immunology, School of Medicine, University of South Carolina, SC 29209, USA
| | - K T Velazquez
- Department of Pathology, Microbiology, & Immunology, School of Medicine, University of South Carolina, SC 29209, USA
| | - J E Bader
- Department of Pathology, Microbiology, & Immunology, School of Medicine, University of South Carolina, SC 29209, USA
| | - M Carson
- Department of Pathology, Microbiology, & Immunology, School of Medicine, University of South Carolina, SC 29209, USA
| | - I Chatzistamou
- Department of Pathology, Microbiology, & Immunology, School of Medicine, University of South Carolina, SC 29209, USA
| | - M Walla
- Department of Chemistry, University of South Carolina, SC 29201, USA
| | - M M Pena
- Department of Biology, University of South Carolina, SC 29201, USA
| | - J L Kubinak
- Department of Pathology, Microbiology, & Immunology, School of Medicine, University of South Carolina, SC 29209, USA
| | - M Nagarkatti
- Department of Pathology, Microbiology, & Immunology, School of Medicine, University of South Carolina, SC 29209, USA
| | - J A Carson
- College of Health Professions, University of Tennessee Health Sciences Center, Memphis, TN 38163, USA
| | - E A Murphy
- Department of Pathology, Microbiology, & Immunology, School of Medicine, University of South Carolina, SC 29209, USA.
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73
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Nexoe AB, Pilecki B, Von Huth S, Husby S, Pedersen AA, Detlefsen S, Marcussen N, Moeller JB, Holmskov U, Sorensen GL. Colonic Epithelial Surfactant Protein D Expression Correlates with Inflammation in Clinical Colonic Inflammatory Bowel Disease. Inflamm Bowel Dis 2019; 25:1349-1356. [PMID: 30753482 DOI: 10.1093/ibd/izz009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Indexed: 12/17/2022]
Abstract
BACKGROUND Inflammatory bowel diseases (IBD) are chronic disorders of the gastrointestinal tract. Surfactant protein D (SP-D) is expressed in the intestinal epithelium and is essential for innate host defense and regulation of inflammatory responses. Genetic variations of SP-D are associated with IBD, but the effects of SP-D in clinical disease development have not been clarified. We hypothesized that colonic epithelial SP-D expression is increased in parallel with intestinal inflammation with the capacity to dampen deleterious effects. METHODS Surgical specimens from IBD patients including Crohn's disease (n = 9) and ulcerative colitis (n = 18) were scored for expression of SP-D and inflammatory activity. Cohoused Sftpd+/+ and Sftpd-/- mouse littermates were subjected to dextran sodium sulfate (DSS) for 7 days to induce colitis. Colonic tissue was scored for histologic damage and analyzed for inflammatory markers and expression of SP-D. RESULTS Surgical specimens from IBD patients showed a strong positive correlation between immunoscore for SP-D and inflammatory activity (R2 = 0.78, P < 0.0001). In mice, colonic epithelial SP-D expression was very low, and DSS-induced colitis was unaffected by SP-D deficiency, although DSS induced transcription of colonic SP-D to a mild degree. CONCLUSIONS A strong positive correlation between inflammatory activity and epithelial expression of SP-D was observed in surgical specimens from IBD patients supporting a role for SP-D in clinical disease. The in vivo study was inconclusive due to very low intestinal SP-D expression in the mouse. Further studies are warranted to support that increased SP-D expression in the human colonic epithelium is protective against intestinal inflammation.
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Affiliation(s)
- Anders B Nexoe
- Cancer and Inflammation Research, Department of Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Bartosz Pilecki
- Cancer and Inflammation Research, Department of Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Sebastian Von Huth
- Cancer and Inflammation Research, Department of Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Steffen Husby
- Hans Christian Andersen Children's Hospital, Odense University Hospital, Odense, Denmark
| | - Andreas A Pedersen
- Hans Christian Andersen Children's Hospital, Odense University Hospital, Odense, Denmark
| | - Sönke Detlefsen
- Department of Pathology, Odense University Hospital, Odense, Denmark
| | - Niels Marcussen
- Department of Pathology, Odense University Hospital, Odense, Denmark
| | - Jesper B Moeller
- Cancer and Inflammation Research, Department of Molecular Medicine, University of Southern Denmark, Odense, Denmark.,Weill Cornell Medicine, Cornell University, New York, New York, USA
| | - Uffe Holmskov
- Cancer and Inflammation Research, Department of Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Grith L Sorensen
- Cancer and Inflammation Research, Department of Molecular Medicine, University of Southern Denmark, Odense, Denmark
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74
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Huang HM, Pai MH, Liu JJ, Yeh SL, Hou YC. Effects of dietary exposure to chlorpyrifos on immune cell populations and inflammatory responses in mice with dextran sulfate sodium-induced colitis. Food Chem Toxicol 2019; 131:110596. [PMID: 31226429 DOI: 10.1016/j.fct.2019.110596] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Revised: 05/28/2019] [Accepted: 06/17/2019] [Indexed: 12/15/2022]
Abstract
This study investigated the effects of chlorpyrifos (CPF) on immune-cell populations and intestinal inflammation using a mouse model of inflammatory bowel disease induced by dextran sulfate sodium (DSS). C57BL/6 mice were randomly assigned to five groups with one normal control (NC) and four DSS-treated groups. Mice in the NC group were given distilled water, whereas the DSS-treated groups received distilled water containing 3% DSS for 6 days to induce colitis. The NC and disease control (DC) groups were fed a control semipurified diet, while the remaining groups were exposed to CPF in the AIN-93 diet at doses of 1, 2.5, or 5 mg/kg/day throughout the study. Results showed that dietary exposure to CPF in colitic mice significantly increased circulating classical monocytes and upregulated gene expressions of chemokines in the colon compared to the NC group. Meanwhile, CPF exposure groups had lower plasma cholinesterase activities and higher percentages of circulating neutrophils than those of the DC group. A shorten length, tissue edema, and lipid peroxidation of the colon were also observed in all CPF-exposed mice. These findings suggest that dietary exposure to CPF affected immune-cell populations and inflammatory responses, which led to more severe tissue injury in mice with DSS-induced colitis.
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Affiliation(s)
- Hsiao-Mei Huang
- Master Program in Food Safety, College of Nutrition, Taipei Medical University, Taipei, 11031, Taiwan
| | - Man-Hui Pai
- Department of Anatomy and Cell Biology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, 11031, Taiwan
| | - Jun-Jen Liu
- School of Medical Laboratory Science and Biotechnology, College of Medical Science and Technology, Taipei Medical University, Taipei, 11031, Taiwan
| | - Sung-Ling Yeh
- School of Nutrition and Health Sciences, College of Nutrition, Taipei Medical University, Taipei, 11031, Taiwan
| | - Yu-Chen Hou
- Master Program in Food Safety, College of Nutrition, Taipei Medical University, Taipei, 11031, Taiwan; Nutrition Research Center, Taipei Medical University Hospital, Taipei, 11031, Taiwan.
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75
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Burgueño JF, Lang JK, Santander AM, Fernández I, Fernández E, Zaias J, Abreu MT. Fluid supplementation accelerates epithelial repair during chemical colitis. PLoS One 2019; 14:e0215387. [PMID: 31002683 PMCID: PMC6474653 DOI: 10.1371/journal.pone.0215387] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Accepted: 04/01/2019] [Indexed: 12/28/2022] Open
Abstract
The dextran sulfate sodium (DSS) model of colitis is a common animal model of inflammatory bowel disease that causes pain and distress. In this study, we aimed to determine whether fluid supplementation can be used as a welfare-based intervention to minimize animal suffering. C57Bl/6 females undergoing acute colitis by administration of 3% DSS in drinking water were supplemented with 1 mL intraperitoneal injections of NaCl and compared to non-supplemented control mice. Mouse behavior and locomotive activity were assessed on days 5–6 after DSS initiation by means of tail suspension, novel object recognition and open field activity tests. Mice were euthanized after either the acute (day 7) or the recovery phase (day 12) of colitis and inflammation, epithelial proliferation, and differentiation were assessed by means of histology, immunohistochemistry, quantitative PCR, and western blot. We found that fluid-supplemented mice had reduced signs of colitis with no alterations in behavior or locomotive activity. Furthermore, we observed an accelerated epithelial repair response after fluid hydration during the acute phase of colitis, characterized by increased crypt proliferation, activation of ERK1/2, and modulation of TGF-β1 expression. Consistent with these findings, fluid-supplemented mice had increased numbers of goblet cells, upregulated expression of differentiation markers for absorptive enterocytes, and reduced inflammation during the recovery phase. Our results show that fluid hydration does not reduce stress in DSS-treated mice but alters colitis evolution by reducing clinical signs and accelerating epithelial repair. These results argue against the routine use of fluid supplementation in DSS-treated mice.
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Affiliation(s)
- Juan F. Burgueño
- Division of Gastroenterology, Department of Medicine, University of Miami–Leonard Miller School of Medicine, Miami, FL, United States of America
- * E-mail:
| | - Jessica K. Lang
- Division of Gastroenterology, Department of Medicine, University of Miami–Leonard Miller School of Medicine, Miami, FL, United States of America
- Department of Immunology and Infectious Diseases, Harvard T. H. Chan School of Public Health, Boston, MA, United States of America
| | - Ana M. Santander
- Division of Gastroenterology, Department of Medicine, University of Miami–Leonard Miller School of Medicine, Miami, FL, United States of America
| | - Irina Fernández
- Division of Gastroenterology, Department of Medicine, University of Miami–Leonard Miller School of Medicine, Miami, FL, United States of America
| | - Ester Fernández
- Animal Physiology Unit, Department of Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, Bellaterra, Barcelona, Spain
| | - Julia Zaias
- Division of Veterinary Resources, University of Miami Miller School of Medicine, Miami, FL, United States of America
- Department of Pathology and Laboratory Medicine, University of Miami–Leonard Miller School of Medicine, Miami, FL, United States of America
| | - Maria T. Abreu
- Division of Gastroenterology, Department of Medicine, University of Miami–Leonard Miller School of Medicine, Miami, FL, United States of America
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76
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Homoectoine Protects Against Colitis by Preventing a Claudin Switch in Epithelial Tight Junctions. Dig Dis Sci 2019; 64:409-420. [PMID: 30269272 DOI: 10.1007/s10620-018-5309-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Accepted: 09/26/2018] [Indexed: 12/11/2022]
Abstract
BACKGROUND Inflammatory bowel diseases (IBD) are multifactorial disorders affecting millions of people worldwide with alarmingly increasing incidences every year. Dysfunction of the intestinal epithelial barrier is associated with IBD pathogenesis, and therapies include anti-inflammatory drugs that enhance intestinal barrier function. However, these drugs often have adverse side effects thus warranting the search for alternatives. Compatible solutes such as bacterial ectoines stabilize cell membranes and proteins. AIM To unravel whether ectoine (1,4,5,6-tetrahydro-2-methyl-4-pyrimidinecarboxylic acid) and homoectoine (4,5,6,7-tetrahydro-2-methyl-1H-(1,3)-diazepine-4-carboxylic acid), a synthetic derivative of ectoine, have beneficial effects during dextran sulfate sodium (DSS)-induced colitis in mice. METHODS/RESULTS We found that the disease activity index was significantly reduced by both ectoines. DSS-induced edema formation, epithelial permeability, leukocyte recruitment and tissue damage were reduced by ectoine and homoectoine, with the latter having stronger effects. Interestingly, the claudin switch usually observed during colitis (decreased expression of claudin-1 and increased expression of the leaky claudin-2) was completely prevented by homoectoine, whereas ectoine only reduced claudin-2 expression. Concomitantly, only homoectoine ameliorated the drop in transepithelial electrical resistance induced by IFN-γ and TNF-α in Caco-2 cells. Both ectoines inhibited loss of ZO-1 and occludin and prevented IFN-γ/TNF-α-induced increased paracellular flux of 4 kDa FITC-dextran in vitro. Moreover, both ectoines reduced expression of pro-inflammatory cytokines and oxidative stress during colitis. CONCLUSION While both ectoine and homoectoine have protective effects on the epithelial barrier during inflammation, only homoectoine completely prevented the inflammatory claudin switch in tight junctions. Thus, homoectoine may serve as diet supplement in IBD patients to reach or extend remission.
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77
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Zhang H, Hua R, Zhang B, Zhang X, Yang H, Zhou X. Serine Alleviates Dextran Sulfate Sodium-Induced Colitis and Regulates the Gut Microbiota in Mice. Front Microbiol 2018; 9:3062. [PMID: 30619148 PMCID: PMC6295577 DOI: 10.3389/fmicb.2018.03062] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2018] [Accepted: 11/27/2018] [Indexed: 01/01/2023] Open
Abstract
Serine alleviates inflammatory responses and is beneficial for gut health; however, whether it exerts any effects on ulcerative colitis or regulates intestinal microbiota remains unknown. We investigated the effects of serine supplementation on colonic morphology, inflammation, and microbiota composition in dextran sulfate sodium (DSS)-induced colitis model in mice. Acute colitis was induced through the oral intake of 3.5% DSS in water for 7 days. Mice with acute colitis were divided into two groups; The DSS and Ser-treated groups were rectally administrated with PBS or 1% (w/v) serine (40 mg/kg body weight) for 7 days. The results showed that serine decreased the disease activity index, as well as myeloperoxidase, eosinophil peroxidase, and proinflammatory cytokine concentrations in colonic tissue, while serine improved colonic morphology and inhibited cell apoptosis in colitis mice. In addition, 16S rRNA phylogenetic sequencing revealed a shift in bacterial community composition, and changes in microbiota functional profiles following serine supplementation, although no significant difference in α-diversity analysis was observed. The effects of serine supplementation helped on the recovery of major perturbations to macrobiotic functions, such as amino acids metabolism; tissue replication and repair; and cell growth and death. Serine might have great potential for the renewal of colonic tissue in DSS-induced colitis.
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Affiliation(s)
- Haiwen Zhang
- Key Laboratory of Tropical Animal Breeding and Epidemic Disease Research of Hainan Province, Hainan University, Haikou, China.,Key Laboratory of Tropical Biological Resources of Ministry of Education, Haikou, China
| | - Rui Hua
- Key Laboratory of Tropical Animal Breeding and Epidemic Disease Research of Hainan Province, Hainan University, Haikou, China.,Key Laboratory of Tropical Biological Resources of Ministry of Education, Haikou, China
| | - Bingxi Zhang
- Key Laboratory of Tropical Animal Breeding and Epidemic Disease Research of Hainan Province, Hainan University, Haikou, China.,Key Laboratory of Tropical Biological Resources of Ministry of Education, Haikou, China
| | - Xiaomeng Zhang
- Key Laboratory of Tropical Animal Breeding and Epidemic Disease Research of Hainan Province, Hainan University, Haikou, China.,Key Laboratory of Tropical Biological Resources of Ministry of Education, Haikou, China
| | - Hui Yang
- Key Laboratory of Tropical Animal Breeding and Epidemic Disease Research of Hainan Province, Hainan University, Haikou, China.,Key Laboratory of Tropical Biological Resources of Ministry of Education, Haikou, China
| | - Xihong Zhou
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China
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78
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Sun MC, Zhang FC, Yin X, Cheng BJ, Zhao CH, Wang YL, Zhang ZZ, Hao HW, Zhang TH, Ye HQ. Lactobacillus reuteri F-9-35 Prevents DSS-Induced Colitis by Inhibiting Proinflammatory Gene Expression and Restoring the Gut Microbiota in Mice. J Food Sci 2018; 83:2645-2652. [PMID: 30216448 DOI: 10.1111/1750-3841.14326] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 06/25/2018] [Accepted: 07/21/2018] [Indexed: 12/14/2022]
Abstract
Probiotics are considered to be a potential treatment for ulcerative colitis (UC). The aim of this study was to compare the preventive effect of a space flight-induced mutant L. reuteri F-9-35 and its wild type on UC in vivo. Female mice were randomly assigned to five groups: one normal and four colitic. Mice from colitis groups were daily gavaged with 0.2 mL 12% (w/v) skim milk containing the mutant or wild type (1 × 1011 CFU/mL), skim milk alone or distilled water for the whole experiment period, starting 7 days before colitis induction. UC was induced by administrating mice with 3.5% (w/v) dextran sulfate sodium (DSS) in drinking water for 7 days, after which DSS was removed and maintained for 3 days as a recovery phase. The results showed that the mice fed with L. reuteri F-9-35 had less inflammatory phenotype according to macroscopic and histological analysis, reduced myeloperoxidase activity, and lower expression of proinflammatory genes (Tumor necrosis factor-α, cyclooxygenase-2 and interleukin-6) in colonic tissue compared with control. Furthermore, L. reuteri F-9-35 protected the mice from gut microbiota dysbiosis from DDS induced colitis. Neither wild type nor the milk alone had such beneficial effects. From above we conclude that L. reuteri F-9-35 has great potential in the prevention of UC as a dietary supplement. PRACTICAL APPLICATION Ulcerative colitis (UC) is the most common inflammatory bowel diseases and there is still a lack of safe and effective treatments. Consumption of L. reuteri F-9-35 may effective in preventing human UC.
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Affiliation(s)
- Mao-Cheng Sun
- College of Food Science and Engineering, Jilin Univ., Changchun, China.,School of Public Health, Jilin Medical Univ., Jilin City, China
| | - Fu-Cheng Zhang
- College of Food Science and Engineering, Jilin Univ., Changchun, China
| | - Xue Yin
- College of Food Science and Engineering, Jilin Univ., Changchun, China
| | - Bi-Jun Cheng
- College of Food Science and Engineering, Jilin Univ., Changchun, China
| | - Chang-Hui Zhao
- College of Food Science and Engineering, Jilin Univ., Changchun, China
| | - Yan-Ling Wang
- School of Pharmaceutical Sciences, Jilin Univ., Changchun, China
| | - Zheng-Zhe Zhang
- College of Food Science and Engineering, Jilin Univ., Changchun, China
| | - Hong-Wei Hao
- Fullarton Bioengineering Technology Co., Ltd, Beijing, China
| | - Tie-Hua Zhang
- College of Food Science and Engineering, Jilin Univ., Changchun, China
| | - Hai-Qing Ye
- College of Food Science and Engineering, Jilin Univ., Changchun, China
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79
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Gaifem J, Gonçalves LG, Dinis-Oliveira RJ, Cunha C, Carvalho A, Torrado E, Rodrigues F, Saraiva M, Castro AG, Silvestre R. L-Threonine Supplementation During Colitis Onset Delays Disease Recovery. Front Physiol 2018; 9:1247. [PMID: 30233416 PMCID: PMC6134202 DOI: 10.3389/fphys.2018.01247] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Accepted: 08/17/2018] [Indexed: 12/19/2022] Open
Abstract
Dietary nutrients have emerged as potential therapeutic adjuncts for inflammatory bowel disease (IBD) given their impact on intestinal homeostasis through the modulation of immune response, gut microbiota composition and epithelial barrier stability. Several nutrients have already been associated with a protective phenotype. Yet, there is a lack of knowledge toward the most promising ones as well as the most adequate phase of action. To unveil the most prominent therapy candidates we characterized the colon metabolic profile during colitis development. We have observed a twofold decrease in threonine levels in mice subjected to DSS-induced colitis. We then assessed the effect of threonine supplementation in the beginning of the inflammatory process (DSS + Thr) or when inflammation is already established (DSS + Thr D8). Colitis progression was similar between the treated groups and control colitic mice, yet threonine had a surprisingly detrimental effect when administered in the beginning of the disease, with mice displaying a delayed recovery when compared to control mice and mice supplemented with threonine after day 8. Although no major changes were found in their metabolic profile, DSS + Thr mice displayed altered expression in mucin-encoding genes, as well as in goblet cell counts, unveiling an impaired ability to produce mucus. Moreover, IL-22 secretion was decreased in DSS + Thr mice when compared to DSS + Thr D8 mice. Overall, these results suggest that supplementation with threonine during colitis induction impact goblet cell number and delays the recovery period. This reinforces the importance of a deeper understanding regarding threonine supplementation in IBD.
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Affiliation(s)
- Joana Gaifem
- Life and Health Sciences Research Institute, School of Health Sciences, University of Minho, Braga, Portugal.,ICVS/3B's - PT Government Associate Laboratory, Guimarães, Portugal
| | - Luís G Gonçalves
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade NOVA de Lisboa, Oeiras, Portugal
| | - Ricardo J Dinis-Oliveira
- IINFACTS - Institute of Research and Advanced Training in Health Sciences and Technologies, Department of Sciences, CESPU, CRL, University Institute of Health Sciences, Gandra, Portugal.,UCIBIO, REQUIMTE, Laboratory of Toxicology, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, Porto, Portugal.,Department of Public Health and Forensic Sciences, and Medical Education, Faculty of Medicine, University of Porto, Porto, Portugal
| | - Cristina Cunha
- Life and Health Sciences Research Institute, School of Health Sciences, University of Minho, Braga, Portugal.,ICVS/3B's - PT Government Associate Laboratory, Guimarães, Portugal
| | - Agostinho Carvalho
- Life and Health Sciences Research Institute, School of Health Sciences, University of Minho, Braga, Portugal.,ICVS/3B's - PT Government Associate Laboratory, Guimarães, Portugal
| | - Egídio Torrado
- Life and Health Sciences Research Institute, School of Health Sciences, University of Minho, Braga, Portugal.,ICVS/3B's - PT Government Associate Laboratory, Guimarães, Portugal
| | - Fernando Rodrigues
- Life and Health Sciences Research Institute, School of Health Sciences, University of Minho, Braga, Portugal.,ICVS/3B's - PT Government Associate Laboratory, Guimarães, Portugal
| | - Margarida Saraiva
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.,Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, Portugal
| | - António G Castro
- Life and Health Sciences Research Institute, School of Health Sciences, University of Minho, Braga, Portugal.,ICVS/3B's - PT Government Associate Laboratory, Guimarães, Portugal
| | - Ricardo Silvestre
- Life and Health Sciences Research Institute, School of Health Sciences, University of Minho, Braga, Portugal.,ICVS/3B's - PT Government Associate Laboratory, Guimarães, Portugal
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80
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Oldak B, Cruz-Rivera M, Flisser A, Mendlovic F. RNA Purity, Real-Time PCR Sensitivity, and Colon Segment Influence mRNA Relative Expression in Murine Dextran Sodium Sulfate Experimental Colitis. J Biomol Tech 2018; 29:61-70. [PMID: 30034295 DOI: 10.7171/jbt.18-2903-001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The dextran sodium sulfate (DSS) model of colitis is widely used as a result of its simplicity and reproducibility and because it mimics clinicopathological disease features. Its effectiveness depends on the mouse strain, DSS MW, and brand. Quantitative RT-PCR (qRT-PCR) is highly sensitive for analyzing cytokine mRNA expression. We analyzed an acute model of DSS treatment in Balb/c mice for the onset of colitis using qRT-PCR for the quantification of a mouse cytokine transcript. We compared differences among 1--and 2-step qRT-PCR for transcript quantification, the effect of multiple concentrations of DSS, and the use of 2 reference genes in 3 portions of the colon. A reliable and sensitive 1-step protocol for qRT-PCR was established with a modified double LiCl precipitation for RNA isolation. The variability of 2 reference genes, β-actin and eukaryotic elongation factor 2, was compared, and expression of IL-6 was analyzed in 3 segments of the colon. The RNA cleaning protocol prevented inhibition of qRT-PCR by DSS, and RNA loss was minimized. No clinical differences among the different DSS concentrations were seen on d 7, but higher concentrations resulted in the appearance of earlier symptoms. Higher efficiency and sensitivity of the 1-step qRT-PCR reaction using eukaryotic elongation factor 2 were obtained and also less variability. Although expression levels of IL-6 were high in the middle and distal colon, the middle section had consistently less variability in values. Thus, this segment is recommended for future studies. These factors influence the statistical significance of data and need to be considered to get accurate and reliable results and to improve comparisons of the published colitis experiments.
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Affiliation(s)
- Bernardo Oldak
- Facultad de Ciencias de la Salud, Universidad Anahuac Mexico Norte, Huixquilucan, State of Mexico, Mexico; and
| | - Mayra Cruz-Rivera
- Departamento de Microbiologia y Parasitologia, Facultad de Medicina, Universidad Nacional Autonoma de Mexico, Mexico City, Mexico
| | - Ana Flisser
- Departamento de Microbiologia y Parasitologia, Facultad de Medicina, Universidad Nacional Autonoma de Mexico, Mexico City, Mexico
| | - Fela Mendlovic
- Facultad de Ciencias de la Salud, Universidad Anahuac Mexico Norte, Huixquilucan, State of Mexico, Mexico; and.,Departamento de Microbiologia y Parasitologia, Facultad de Medicina, Universidad Nacional Autonoma de Mexico, Mexico City, Mexico
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81
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Lightly Cooked Broccoli Is as Effective as Raw Broccoli in Mitigating Dextran Sulfate Sodium-Induced Colitis in Mice. Nutrients 2018; 10:nu10060748. [PMID: 29890681 PMCID: PMC6024548 DOI: 10.3390/nu10060748] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 06/05/2018] [Accepted: 06/06/2018] [Indexed: 12/12/2022] Open
Abstract
Dietary broccoli is anti-inflammatory. Past studies have typically investigated raw broccoli, even though most consumers prefer cooked broccoli, where the plant myrosinase is inactivated by heat, resulting in failure of formation of the anti-inflammatory bioactive compound sulforaphane (SF). This study compareed efficacy of lightly cooked broccoli (CB) containing greatly diminished myrosinase activity, with raw broccoli (RB), in mitigating colitis in dextran sulfate sodium (DSS)-treated mice. Male C57BL/6 mice were fed for two weeks on a 10% RB, 10% CB or control diet, all based on the AIN-93M diet. Half (n = 9) of each group received drinking water, half received 2.5% DSS in water for one week, starting from Day 7 of the diet. Even with far less plant myrosinase activity, CB was essentially as effective as RB in lessening damage by DSS, evidenced by decreased disease activity index, attenuated colon length shrinkage, less endotoxin (lipopolysaccharide) leakage into blood, and less severe colon lesions as assessed by histopathology. mRNA expression of pro-inflammatory cytokines indicated that broccoli anti-inflammatory action may be through inhibition of the IL-6 trans-signaling pathway, as evidenced by reversal of the DSS-increased expression of IL-6, CCR2 and vascular cell adhesion molecule 1 (VCAM-1).
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82
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Shen S, Prame Kumar K, Stanley D, Moore RJ, Van TTH, Wen SW, Hickey MJ, Wong CHY. Invariant Natural Killer T Cells Shape the Gut Microbiota and Regulate Neutrophil Recruitment and Function During Intestinal Inflammation. Front Immunol 2018; 9:999. [PMID: 29867976 PMCID: PMC5949322 DOI: 10.3389/fimmu.2018.00999] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 04/23/2018] [Indexed: 12/16/2022] Open
Abstract
Invariant natural killer T (iNKT) cells and neutrophils play an increasingly important part in the pathogenesis of inflammatory diseases, but their precise roles in modulating colitis remain unclear. Previous studies have shown important interplays between host immune system and the gut microbiota, and the resulting modulation of inflammation. However, the interactions between iNKT cells, neutrophil and gut microbiota in regulating colitis pathology are poorly understood. Here, we show iNKT cell-deficient Jα18−/− mice display reduced dextran sodium sulfate (DSS)-induced colonic inflammation compared to their wild-type (WT) counterparts. We reveal that there is a distinct gut microbiota shaped by the absence of iNKT cells, which comprises of microorganisms that are associated with protection from colonic inflammation. Additionally, the reduced inflammation in Jα18−/− mice was correlated with increased expressions of neutrophil chemoattractant (Cxcl1 and Cxcl2) and increased neutrophil recruitment. However, these neutrophils were recruited to the colon at day 3 of our model, prior to observable clinical signs at day 5. Further analysis shows that these neutrophils, primed by the microbiota shaped by the lack of iNKT cells, exhibit anti-inflammatory and immune-modulatory properties. Indeed, depletion of neutrophils in DSS-treated Jα18−/− mice demonstrates that neutrophils confer an anti-colitogenic effect in the absence of iNKT cells. Thus, our data supports a changing dogma that neutrophils possess important regulatory roles in inflammation and highlights the complexity of the iNKT cell–microbiota–neutrophil axis in regulating colonic inflammation.
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Affiliation(s)
- Sj Shen
- Centre for Inflammatory Diseases, Monash University Department of Medicine, Monash Medical Centre, Clayton, VIC, Australia
| | - Kathryn Prame Kumar
- Centre for Inflammatory Diseases, Monash University Department of Medicine, Monash Medical Centre, Clayton, VIC, Australia
| | - Dragana Stanley
- School of Health Medical and Applied Sciences, Central Queensland University, Rockhampton, QLD, Australia
| | - Robert J Moore
- Infection and Immunity Program, Department of Microbiology, Monash Biomedicine Discovery Institute, Monash University, Melbourne, VIC, Australia.,School of Science, RMIT University, Melbourne, VIC, Australia
| | - Thi Thu Hao Van
- School of Science, RMIT University, Melbourne, VIC, Australia
| | - Shu Wen Wen
- Centre for Inflammatory Diseases, Monash University Department of Medicine, Monash Medical Centre, Clayton, VIC, Australia
| | - Michael J Hickey
- Centre for Inflammatory Diseases, Monash University Department of Medicine, Monash Medical Centre, Clayton, VIC, Australia
| | - Connie H Y Wong
- Centre for Inflammatory Diseases, Monash University Department of Medicine, Monash Medical Centre, Clayton, VIC, Australia
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83
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Viennois E, Tahsin A, Merlin D. Purification of Total RNA from DSS-treated Murine Tissue via Lithium Chloride Precipitation. Bio Protoc 2018; 8:e2829. [PMID: 29951571 DOI: 10.21769/bioprotoc.2829] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
Abstract
We have developed a protocol to purify RNA from DSS (Dextran Sulfate Sodium)-treated mouse tissues. This method, which prevents downstream inhibition of q-RT-PCR observed in DSS-treated tissues, relies on successive precipitations with lithium chloride.
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Affiliation(s)
- Emilie Viennois
- Institute for Biomedical Sciences, Center for Diagnostics and Therapeutics, Georgia State University, Atlanta, GA, USA
| | - Anika Tahsin
- Institute for Biomedical Sciences, Center for Diagnostics and Therapeutics, Georgia State University, Atlanta, GA, USA
| | - Didier Merlin
- Institute for Biomedical Sciences, Center for Diagnostics and Therapeutics, Georgia State University, Atlanta, GA, USA.,Veterans Affairs Medical Center, Decatur, GA, USA
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84
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Bader JE, Enos RT, Velázquez KT, Carson MS, Nagarkatti M, Nagarkatti PS, Chatzistamou I, Davis JM, Carson JA, Robinson CM, Murphy EA. Macrophage depletion using clodronate liposomes decreases tumorigenesis and alters gut microbiota in the AOM/DSS mouse model of colon cancer. Am J Physiol Gastrointest Liver Physiol 2018; 314:G22-G31. [PMID: 29025731 PMCID: PMC5866374 DOI: 10.1152/ajpgi.00229.2017] [Citation(s) in RCA: 105] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Revised: 09/11/2017] [Accepted: 09/12/2017] [Indexed: 01/31/2023]
Abstract
We examined the role of macrophages in inflammation associated with colorectal cancer (CRC). Given the emerging evidence on immune-microbiota interactions in CRC, we also sought to examine the interaction between macrophages and gut microbiota. To induce CRC, male C57BL/6 mice ( n = 32) received a single injection of azoxymethane (AOM), followed by three cycles of dextran sodium sulfate (DSS)-supplemented water in weeks 1, 4, and 7. Prior to the final DSS cycle ( week 7) and twice weekly until euthanasia, mice ( n = 16/group) received either 200 μl ip of clodronate-filled liposomes (CLD) or phosphate-buffered saline (PBS) encapsulated liposomes to deplete macrophages. Colon tissue was analyzed for polyp burden, macrophage markers, transcription factors, and inflammatory mediators. Stool samples were collected, and DNA was isolated and subsequently sequenced for 16S rRNA. Clodronate liposomes decreased tumor number by ∼36% and specifically large (≥1 mm) tumors by ∼36% ( P < 0.05). This was consistent with a decrease in gene expression of EMR1 in the colon tissue and polyp tissue as well as expression of select markers associated with M1 (IL-6) and M2 macrophages (IL-13, IL-10, TGFβ, CCL17) in the colon tissue ( P < 0.05). Similarly, there was a decrease in STAT3 and p38 MAPK and ERK signaling in colon tissue. Clodronate liposomes increased the relative abundance of the Firmicutes phylum ( P < 0.05) and specifically Lactobacillaceae and Clostridiaceae families, which have been associated with reduced CRC risk. Overall, these data support the development of therapeutic strategies to target macrophages in CRC and provide support for further evaluation of immune-microbiota interactions in CRC. NEW & NOTEWORTHY We found that macrophage depletion during late-stage tumorigenesis is effective at reducing tumor growth. This was associated with a decrease in macrophage markers and chemokines in the colon tissue and a decrease in transcription factors that are linked to colorectal cancer. The macrophage-depleted group was found to have an increased abundance of Firmicutes, a phylum with documented anti-tumorigenic effects. Overall, these data support the development of therapeutic strategies to target macrophages in colorectal cancer.
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Affiliation(s)
- Jackie E Bader
- Department of Pathology, Microbiology, and Immunology, School of Medicine, University of South Carolina , Columbia, South Carolina
| | - Reilly T Enos
- Department of Pathology, Microbiology, and Immunology, School of Medicine, University of South Carolina , Columbia, South Carolina
| | - Kandy T Velázquez
- Department of Pathology, Microbiology, and Immunology, School of Medicine, University of South Carolina , Columbia, South Carolina
- Department of Exercise Science, School of Public Health, University of South Carolina , Columbia, South Carolina
| | - Meredith S Carson
- Department of Pathology, Microbiology, and Immunology, School of Medicine, University of South Carolina , Columbia, South Carolina
| | - Mitzi Nagarkatti
- Department of Pathology, Microbiology, and Immunology, School of Medicine, University of South Carolina , Columbia, South Carolina
| | - Prakash S Nagarkatti
- Department of Pathology, Microbiology, and Immunology, School of Medicine, University of South Carolina , Columbia, South Carolina
| | - Ioulia Chatzistamou
- Department of Pathology, Microbiology, and Immunology, School of Medicine, University of South Carolina , Columbia, South Carolina
| | - J Mark Davis
- Department of Exercise Science, School of Public Health, University of South Carolina , Columbia, South Carolina
| | - James A Carson
- Department of Exercise Science, School of Public Health, University of South Carolina , Columbia, South Carolina
- Center for Colon Cancer Research, University of South Carolina , Columbia, South Carolina
| | - Cory M Robinson
- Department of Microbiology, Immunology, and Cell Biology, School of Medicine, West Virginia University , Morgantown, West Virginia
| | - E Angela Murphy
- Department of Pathology, Microbiology, and Immunology, School of Medicine, University of South Carolina , Columbia, South Carolina
- Center for Colon Cancer Research, University of South Carolina , Columbia, South Carolina
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85
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Krych Ł, Kot W, Bendtsen KM, Hansen AK, Vogensen FK, Nielsen DS. Have you tried spermine? A rapid and cost-effective method to eliminate dextran sodium sulfate inhibition of PCR and RT-PCR. J Microbiol Methods 2018; 144:1-7. [DOI: 10.1016/j.mimet.2017.10.015] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Revised: 10/27/2017] [Accepted: 10/27/2017] [Indexed: 01/29/2023]
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86
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Fang K, Law IKM, Padua D, Sideri A, Huang V, Kevil CG, Iliopoulos D, Pothoulakis C. MicroRNA-31-3p Is Involved in Substance P (SP)-Associated Inflammation in Human Colonic Epithelial Cells and Experimental Colitis. THE AMERICAN JOURNAL OF PATHOLOGY 2017; 188:586-599. [PMID: 29253460 DOI: 10.1016/j.ajpath.2017.10.023] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Revised: 10/24/2017] [Accepted: 10/30/2017] [Indexed: 02/08/2023]
Abstract
Substance P (SP) mediates colitis. SP signaling regulates the expression of several miRNAs, including miR-31-3p, in human colonocytes. However, the role of miR-31-3p in colitis and the underlying mechanisms has not been elucidated. We performed real-time PCR analysis of miR-31-3p expression in human colonic epithelial cells overexpressing neurokinin-1 receptor (NCM460 NK-1R) in response to SP stimulation and in NCM460 cells after IL-6, IL8, tumor necrosis factor (TNF)-α, and interferon-γ exposure. Functions of miR-31-3p were tested in NCM460-NK-1R cells and the trinitrobenzene sulfonic acid (TNBS) and dextran sodium sulfate (DSS) models of colitis. Targets of miRNA-31-3p were confirmed by Western blot analysis and luciferase reporter assay. Jun N-terminal kinase inhibition decreased SP-induced miR-31-3p expression. miR-31-3p expression was increased in both TNBS- and DSS-induced colitis and human colonic biopsies from ulcerative colitis, compared with controls. Intracolonic administration of a miR-31-3p chemical inhibitor exacerbated TNBS- and DSS-induced colitis and increased colonic TNF-α, CXCL10, and chemokine (C-C motif) ligand 2 (CCL2) mRNA expression. Conversely, overexpression of miR-31-3p ameliorated the severity of DSS-induced colitis. Bioinformatic, luciferase reporter assay, and Western blot analyses identified RhoA as a target of miR-31-3p in NCM460 cells. Constitutive activation of RhoA led to increased expression of CCL2, IL6, TNF-α, and CXCL10 in NCM460-NK-1R cells on SP stimulation. Our results reveal a novel SP-miR-31-3p-RhoA pathway that protects from colitis. The use of miR-31-3p mimics may be a promising approach for colitis treatment.
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Affiliation(s)
- Kai Fang
- Inflammatory Bowel Disease Center, Vatche and Tamar Manoukian Division of Digestive Diseases, David Geffen School of Medicine at University of California at Los Angeles, Los Angeles, California
| | - Ivy Ka Man Law
- Inflammatory Bowel Disease Center, Vatche and Tamar Manoukian Division of Digestive Diseases, David Geffen School of Medicine at University of California at Los Angeles, Los Angeles, California
| | - David Padua
- Inflammatory Bowel Disease Center, Vatche and Tamar Manoukian Division of Digestive Diseases, David Geffen School of Medicine at University of California at Los Angeles, Los Angeles, California
| | - Aristea Sideri
- Inflammatory Bowel Disease Center, Vatche and Tamar Manoukian Division of Digestive Diseases, David Geffen School of Medicine at University of California at Los Angeles, Los Angeles, California
| | - Vanessa Huang
- Inflammatory Bowel Disease Center, Vatche and Tamar Manoukian Division of Digestive Diseases, David Geffen School of Medicine at University of California at Los Angeles, Los Angeles, California
| | - Christopher G Kevil
- Department of Pathology, Louisiana State University Health Sciences Center, Shreveport, Louisiana
| | - Dimitrios Iliopoulos
- Center for Systems Biomedicine, Vatche and Tamar Manoukian Division of Digestive Diseases, David Geffen School of Medicine at University of California at Los Angeles, Los Angeles, California
| | - Charalabos Pothoulakis
- Inflammatory Bowel Disease Center, Vatche and Tamar Manoukian Division of Digestive Diseases, David Geffen School of Medicine at University of California at Los Angeles, Los Angeles, California.
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88
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Hoffmann M, Schwertassek U, Seydel A, Weber K, Falk W, Hauschildt S, Lehmann J. A refined and translationally relevant model of chronic DSS colitis in BALB/c mice. Lab Anim 2017; 52:240-252. [PMID: 29192559 DOI: 10.1177/0023677217742681] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Inflammatory bowel diseases (IBD) are chronic relapsing disorders of the gastrointestinal tract. Several mouse models for IBD are available, but the acute dextran sulfate sodium (DSS)-induced colitis model is mostly used for preclinical studies. However, this model lacks chronicity and often leads to significant loss of mice. The aim of this study was to establish a refined and translationally relevant model of DSS chronic colitis in BALB/c mice. In the first part, we compared several standard therapeutic (ST) treatments for IBD in the acute DSS colitis model to identify the optimal treatment control for a DSS colitis model as compared to literature data. In the second part, we tested the two most effective ST treatments in a refined model of chronic DSS colitis. Cyclosporine A (CsA) and 6-thioguanine (6-TG) caused considerable reduction of clinical scores in acute DSS colitis. The clinical outcome was confirmed by the results for colon length and by histopathological evaluation. Moreover, CsA and 6-TG considerably reduced mRNA expression of several pro-inflammatory cytokines in spleen and colon. Both compounds also showed a substantial therapeutic effect in the refined model of chronic DSS colitis with regard to clinical scores and histopathology as well as the expression of inflammatory markers. The refined model of chronic DSS colitis reflects important features of IBD and is well suited to test potential IBD therapeutics.
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Affiliation(s)
- Maximilian Hoffmann
- 1 Department of Therapy Validation, Fraunhofer Institute for Cell Therapy and Immunology, Leipzig, Germany
| | - Ulla Schwertassek
- 1 Department of Therapy Validation, Fraunhofer Institute for Cell Therapy and Immunology, Leipzig, Germany
| | - Aleksandra Seydel
- 1 Department of Therapy Validation, Fraunhofer Institute for Cell Therapy and Immunology, Leipzig, Germany
| | | | - Werner Falk
- 3 Department of Internal Medicine I, University Hospital Regensburg, Regensburg, Germany
| | - Sunna Hauschildt
- 4 Faculty of Biological Sciences, Pharmacy, and Psychology, University of Leipzig, Leipzig, Germany
| | - Jörg Lehmann
- 1 Department of Therapy Validation, Fraunhofer Institute for Cell Therapy and Immunology, Leipzig, Germany
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89
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Anti-inflammatory effect of glucose-lysine Maillard reaction products on intestinal inflammation model in vivo. Int Immunopharmacol 2017; 52:324-332. [PMID: 28987931 DOI: 10.1016/j.intimp.2017.09.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Revised: 09/12/2017] [Accepted: 09/12/2017] [Indexed: 12/15/2022]
Abstract
Inflammatory bowel diseases (IBDs) are chronic disorders that are characterized by intestinal epithelial inflammation and injury. Currently, the most employed therapies are antibiotics and anti-inflammatory drugs; however, the side effects limit long-term effectiveness. We evaluated the impact of glucose-lysine Maillard reaction products (Glc-Lys MRPs) on colitis, induced in rats by an administration of 5% dextran sulfate sodium (DSS) in drinking water. Glc-Lys MRPs ameliorate DSS-induced colitis, as determined by a decrease in disease index activity, colon weight/length ratio, nitric oxide levels in serum, recovery of body weight loss, colon length and serum lysozyme levels. Furthermore, Glc-Lys MRPs increase the glutathione content and the activity of glutathione peroxidase, superoxide dismutase and catalase, and inhibit lipid peroxidation and myeloperoxidase activity in colon tissues. In particular, Glc-Lys MRPs suppress the mRNA level of the inflammatory cytokines and nuclear factor-κB in colon tissues. This study suggests the potential of Glc-Lys MRPs in preventing or treating IBDs.
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90
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Liu F, Bu HF, Geng H, De Plaen IG, Gao C, Wang P, Wang X, Kurowski JA, Yang H, Qian J, Tan XD. Sirtuin-6 preserves R-spondin-1 expression and increases resistance of intestinal epithelium to injury in mice. Mol Med 2017; 23:272-284. [PMID: 29387864 PMCID: PMC5654826 DOI: 10.2119/molmed.2017.00085] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Accepted: 08/28/2017] [Indexed: 12/25/2022] Open
Abstract
Sirtuin-6 (Sirt6) is a critical epigenetic regulator, but its function in the gut is unknown. Here, we studied the role of intestinal epithelial Sirt6 in colitis-associated intestinal epithelial injury. We found that Sirt6, which is predominantly expressed in epithelial cells in intestinal crypts, is decreased in colitis in both mice and humans. Colitis-derived inflammatory mediators including interferon-γ and reactive oxygen species strongly inhibited Sirt6 protein expression in young adult mouse colonocyte (YAMC) cells. The susceptibility of the cells to injurious insults was increased after knockdown of Sirt6 expression. In contrast, YAMC cells with Sirt6 overexpression exhibited more resistance to injurious insult. Furthermore, intestinal epithelial-specific Sirt6 (Sirt6IEC-KO) knockout mice exhibited greater susceptibility to dextran sulfate sodium (DSS)-induced colitis. RNA sequencing transcriptome analysis revealed that inflammatory mediators such as tumor necrosis factor (TNF)-α suppressed expression of R-spondin-1 (Rspo1, a critical growth factor for intestinal epithelial cells) in Sirt6-silenced YAMC cells in vitro. In addition, lipopolysaccharide was found to inhibit colonic Rspo1 expression in Sirt6IEC-KO mice but not their control littermates. Furthermore, Sirt6IEC-KO mice with DSS-induced colitis also exhibited in a significant decrease in Rspo1 expression in colons. In vitro, knockdown of Rspo1 attenuated the effect of ectopic expression of Sirt6 on protection of YAMC cells against cell death challenges. In conclusion, Sirt6 plays an important role in protecting intestinal epithelial cells against inflammatory injury in a mechanism associated with preserving Rspo1 levels in the cells.
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Affiliation(s)
- Fangyi Liu
- Department of Gastroenterology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People’s Republic of China
- Center for Intestinal and Liver Inflammation Research, Stanley Manne Children’s Research Institute, Ann and Robert H Lurie Children’s Hospital of Chicago, Chicago, Illinois, United States of America
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
| | - Heng-Fu Bu
- Center for Intestinal and Liver Inflammation Research, Stanley Manne Children’s Research Institute, Ann and Robert H Lurie Children’s Hospital of Chicago, Chicago, Illinois, United States of America
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
| | - Hua Geng
- Center for Intestinal and Liver Inflammation Research, Stanley Manne Children’s Research Institute, Ann and Robert H Lurie Children’s Hospital of Chicago, Chicago, Illinois, United States of America
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
| | - Isabelle G De Plaen
- Center for Intestinal and Liver Inflammation Research, Stanley Manne Children’s Research Institute, Ann and Robert H Lurie Children’s Hospital of Chicago, Chicago, Illinois, United States of America
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
| | - Chao Gao
- Center of Clinical Reproductive Medicine, State Key Laboratory of Reproductive Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
| | - Peng Wang
- Center for Intestinal and Liver Inflammation Research, Stanley Manne Children’s Research Institute, Ann and Robert H Lurie Children’s Hospital of Chicago, Chicago, Illinois, United States of America
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
| | - Xiao Wang
- Center for Intestinal and Liver Inflammation Research, Stanley Manne Children’s Research Institute, Ann and Robert H Lurie Children’s Hospital of Chicago, Chicago, Illinois, United States of America
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
| | - Jacob A Kurowski
- Center for Intestinal and Liver Inflammation Research, Stanley Manne Children’s Research Institute, Ann and Robert H Lurie Children’s Hospital of Chicago, Chicago, Illinois, United States of America
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
| | - Hong Yang
- Department of Gastroenterology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People’s Republic of China
| | - Jiaming Qian
- Department of Gastroenterology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People’s Republic of China
| | - Xiao-Di Tan
- Center for Intestinal and Liver Inflammation Research, Stanley Manne Children’s Research Institute, Ann and Robert H Lurie Children’s Hospital of Chicago, Chicago, Illinois, United States of America
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
- Department of Research and Development, Jesse Brown VA Medical Center, Chicago, Illinois, United States of America
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91
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Sugihara K, Masuda M, Nakao M, Abuduli M, Imi Y, Oda N, Okahisa T, Yamamoto H, Takeda E, Taketani Y. Dietary phosphate exacerbates intestinal inflammation in experimental colitis. J Clin Biochem Nutr 2017; 61:91-99. [PMID: 28955125 PMCID: PMC5612814 DOI: 10.3164/jcbn.16-117] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Accepted: 12/26/2016] [Indexed: 12/31/2022] Open
Abstract
The recent widespread consumption of Western diets and food additives worldwide is associated with excessive inorganic phosphate intake. However, researchers have known little about the impact of dietary phosphate intake on the development of inflammatory bowel disease to date. In this study, we investigated the effects of dietary phosphate on intestinal inflammation in experimental colitis. Sprague-Dawley rats were fed different phosphate diets (0.5%, 1.0% and 1.5% phosphate) with or without dextran sulfate sodium. For in vitro study, the effects of phosphate on proinflammatory cytokine induction and reactive oxygen species production in RAW264.7 macrophage were examined. Dietary phosphate exacerbated intestinal inflammation in experimental colitis in a dose-dependent manner, as assessed by the clinical disease activity score, colon length, and histology. Furthermore, the high phosphate diet increased myeloperoxidase activity and proinflammatory cytokine mRNA expression through the activation of nuclear factor κB in the inflamed colon. In addition, high phosphate loading in RAW264.7 cells directly enhanced reactive oxygen species production and proinflammatory cytokine gene expression. Our results demonstrated that the high phosphate diet exacerbated intestinal inflammation in experimental colitis. These findings have important therapeutic implications for inflammatory bowel disease patients.
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Affiliation(s)
- Kohei Sugihara
- Departments of Clinical Nutrition and Food Management, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8503, Japan
| | - Masashi Masuda
- Departments of Clinical Nutrition and Food Management, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8503, Japan
| | - Mari Nakao
- Departments of Clinical Nutrition and Food Management, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8503, Japan
| | - Maerjianghan Abuduli
- Departments of Clinical Nutrition and Food Management, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8503, Japan
| | - Yukiko Imi
- Departments of Clinical Nutrition and Food Management, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8503, Japan
| | - Naoko Oda
- Departments of Clinical Nutrition and Food Management, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8503, Japan
| | - Toshiya Okahisa
- Department of Gastroenterology and Oncology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8503, Japan
| | - Hironori Yamamoto
- Department of Health and Nutrition, Faculty of Human Life, Jin-ai University, Fukui 915-8586, Japan
| | - Eiji Takeda
- Departments of Clinical Nutrition and Food Management, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8503, Japan
| | - Yutaka Taketani
- Departments of Clinical Nutrition and Food Management, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8503, Japan
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92
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Parnell EA, Walch EM, Lo DD. Inducible Colonic M Cells Are Dependent on TNFR2 but Not Ltβr, Identifying Distinct Signalling Requirements for Constitutive Versus Inducible M Cells. J Crohns Colitis 2017; 11:751-760. [PMID: 27932454 PMCID: PMC5881705 DOI: 10.1093/ecco-jcc/jjw212] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Accepted: 11/16/2016] [Indexed: 02/08/2023]
Abstract
BACKGROUND AND AIMS M cells associated with organised lymphoid tissues such as intestinal Peyer's patches provide surveillance of the intestinal lumen. Inflammation or infection in the colon can induce an M cell population associated with lymphoid infiltrates; paradoxically, induction is dependent on the inflammatory cytokine tumour necrosis factor [TNF]-α. Anti-TNFα blockade is an important therapeutic in inflammatory bowel disease, so understanding the effects of TNFα signalling is important in refining therapeutics. METHODS To dissect pro-inflammatory signals from M cell inductive signals, we used confocal microscopy image analysis to assess requirements for specific cytokine receptor signals using TNF receptor 1 [TNFR1] and 2 [TNFR2] knockouts [ko] back-crossed to the PGRP-S-dsRed transgene; separate groups were treated with soluble lymphotoxin β receptor [sLTβR] to block LTβR signalling. All groups were treated with dextran sodium sulphate [DSS] to induce colitis. RESULTS Deficiency of TNFR1 or TNFR2 did not prevent DSS-induced inflammation nor induction of stromal cell expression of receptor activator of nuclear factor kappa-B ligand [RANKL], but absence of TNFR2 prevented M cell induction. LTβR blockade had no effect on M cell induction, but it appeared to reduce RANKL induction below adjacent M cells. CONCLUSIONS TNFR2 is required for inflammation-inducible M cells, indicating that constitutive versus inflammation-inducible M cells depend on different triggers. The inducible M cell dependence on TNFR2 suggests that this specific subset is dependent on TNFα in addition to a presumed requirement for RANKL. Since inducible M cell function will influence immune responses, selective blockade of TNFα may affect colonic inflammation.
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Affiliation(s)
- Erinn A. Parnell
- Division of Biomedical Sciences, University of California Riverside School of Medicine,Riverside, CA, USA.
| | - Erin M. Walch
- Division of Biomedical Sciences, University of California Riverside School of Medicine,Riverside, CA, USA.
| | - David D. Lo
- Division of Biomedical Sciences, University of California Riverside School of Medicine,Riverside, CA, USA.
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93
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Hudson GM, Flannigan KL, Erickson SL, Vicentini FA, Zamponi A, Hirota CL, Alston L, Altier C, Ghosh S, Rioux KP, Mani S, Chang TK, Hirota SA. Constitutive androstane receptor regulates the intestinal mucosal response to injury. Br J Pharmacol 2017; 174:1857-1871. [PMID: 28320072 DOI: 10.1111/bph.13787] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Revised: 02/21/2017] [Accepted: 03/14/2017] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND AND PURPOSE The pathogenesis of the inflammatory bowel diseases (IBD), comprising Crohn's disease (CD) and ulcerative colitis (UC), involves aberrant interactions between a genetically susceptible individual, their microbiota and environmental factors. Alterations in xenobiotic receptor expression and function are associated with increased risk for IBD. Here, we have assessed the role of the constitutive androstane receptor (CAR), a xenobiotic receptor closely related to the pregnane X receptor, in the regulation of intestinal mucosal homeostasis. EXPERIMENTAL APPROACH CAR expression was assessed in intestinal mucosal biopsies obtained from CD and UC patients, and in C57/Bl6 mice exposed to dextran sulphate sodium (DSS; 3.5% w/v in drinking water) to evoke intestinal inflammation and tissue damage. CAR-deficient mice were exposed to DSS and mucosal healing assessed. Modulation of wound healing by CAR was assessed in vitro. The therapeutic potential of CAR activation was evaluated, using 3,3',5,5'-tetrachloro-1,4-bis(pyridyloxy)benzene (TCPOBOP), a selective rodent CAR agonist. KEY RESULTS CAR expression was reduced in CD and UC samples, compared with expression in healthy controls. This was reproduced in our DSS studies, where CAR expression was reduced in colitic mice. CAR-deficient mice exhibited reduced healing following DSS exposure. In vitro, CAR activation accelerated intestinal epithelial wound healing by enhancing cell migration. Lastly, treating mice with TCPOBOP, following induction of colitis, enhanced mucosal healing. CONCLUSION AND IMPLICATIONS Our results support the notion that xenobiotic sensing is altered during intestinal inflammation, and suggest that CAR activation may prove effective in enhancing mucosal healing in patients with IBD.
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Affiliation(s)
- Grace M Hudson
- Department of Physiology & Pharmacology, University of Calgary, Calgary, Canada.,Department of Microbiology, Immunology & Infectious Diseases, University of Calgary, Calgary, Canada
| | - Kyle L Flannigan
- Department of Physiology & Pharmacology, University of Calgary, Calgary, Canada.,Department of Microbiology, Immunology & Infectious Diseases, University of Calgary, Calgary, Canada
| | - Sarah L Erickson
- Department of Physiology & Pharmacology, University of Calgary, Calgary, Canada.,Department of Microbiology, Immunology & Infectious Diseases, University of Calgary, Calgary, Canada
| | - Fernando A Vicentini
- Department of Physiology & Pharmacology, University of Calgary, Calgary, Canada.,Department of Microbiology, Immunology & Infectious Diseases, University of Calgary, Calgary, Canada
| | - Alexandra Zamponi
- Department of Physiology & Pharmacology, University of Calgary, Calgary, Canada.,Department of Microbiology, Immunology & Infectious Diseases, University of Calgary, Calgary, Canada
| | | | - Laurie Alston
- Department of Physiology & Pharmacology, University of Calgary, Calgary, Canada.,Department of Microbiology, Immunology & Infectious Diseases, University of Calgary, Calgary, Canada
| | - Christophe Altier
- Department of Physiology & Pharmacology, University of Calgary, Calgary, Canada
| | - Subrata Ghosh
- Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, UK
| | - Kevin P Rioux
- Department of Medicine, University of Calgary, Calgary, Canada
| | - Sridhar Mani
- Department of Medicine & Genetics, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Thomas K Chang
- Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, Canada
| | - Simon A Hirota
- Department of Physiology & Pharmacology, University of Calgary, Calgary, Canada.,Department of Microbiology, Immunology & Infectious Diseases, University of Calgary, Calgary, Canada
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Protein Kinase R Mediates the Inflammatory Response Induced by Hyperosmotic Stress. Mol Cell Biol 2017; 37:MCB.00521-16. [PMID: 27920257 DOI: 10.1128/mcb.00521-16] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Accepted: 12/01/2016] [Indexed: 12/25/2022] Open
Abstract
High extracellular osmolarity results in a switch from an adaptive to an inflammatory gene expression program. We show that hyperosmotic stress activates the protein kinase R (PKR) independently of its RNA-binding domain. In turn, PKR stimulates nuclear accumulation of nuclear factor κB (NF-κB) p65 species phosphorylated at serine-536, which is paralleled by the induction of a subset of inflammatory NF-κB p65-responsive genes, including inducible nitric oxide synthase (iNOS), interleukin-6 (IL-6), and IL-1β. The PKR-mediated hyperinduction of iNOS decreases cell survival in mouse embryonic fibroblasts via mechanisms involving nitric oxide (NO) synthesis and posttranslational modification of proteins. Moreover, we demonstrate that the PKR inhibitor C16 ameliorates both iNOS amplification and disease-induced phenotypic breakdown of the intestinal epithelial barrier caused by an increase in extracellular osmolarity induced by dextran sodium sulfate (DSS) in vivo Collectively, these findings indicate that PKR activation is an essential part of the molecular switch from adaptation to inflammation in response to hyperosmotic stress.
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95
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Vargas Robles H, Castro Ochoa KF, Nava P, Silva Olivares A, Shibayama M, Schnoor M. Analyzing Beneficial Effects of Nutritional Supplements on Intestinal Epithelial Barrier Functions During Experimental Colitis. J Vis Exp 2017. [PMID: 28117803 DOI: 10.3791/55095] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Inflammatory bowel diseases (IBD), including Crohn's disease and ulcerative colitis, are chronic relapsing disorders of the intestines. They cause severe problems, such as abdominal cramping, bloody diarrhea, and weight loss, in affected individuals. Unfortunately, there is no cure yet, and treatments only aim to alleviate symptoms. Current treatments include anti-inflammatory and immunosuppressive drugs that may cause severe side effects. This warrants the search for alternative treatment options, such as nutritional supplements, that do not cause side effects. Before their application in clinical studies, such compounds must be rigorously tested for effectiveness and security in animal models. A reliable experimental model is the dextran sulfate sodium (DSS) colitis model in mice, which reproduces many of the clinical signs of ulcerative colitis in humans. We recently applied this model to test the beneficial effects of a nutritional supplement containing vitamins C and E, L-arginine, and ω3-polyunsaturated fatty acids (PUFA). We analyzed various disease parameters and found that this supplement was able to ameliorate edema formation, tissue damage, leukocyte infiltration, oxidative stress, and the production of pro-inflammatory cytokines, leading to an overall improvement in the disease activity index. In this article, we explain in detail the correct application of nutritional supplements using the DSS colitis model in C57Bl/6 mice, as well as how disease parameters such as histology, oxidative stress, and inflammation are assessed. Analyzing the beneficial effects of different diet supplements may then eventually open new avenues for the development of alternative treatment strategies that alleviate IBD symptoms and/or that prolong the phases of remission without causing severe side effects.
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Affiliation(s)
- Hilda Vargas Robles
- Department of Molecular Biomedicine, Center for Research and Advanced Studies of the National Polytechnic Institute
| | - Karla Fabiola Castro Ochoa
- Department of Molecular Biomedicine, Center for Research and Advanced Studies of the National Polytechnic Institute
| | - Porfirio Nava
- Department of Physiology, Biophysics and Neurosciences, Center for Research and Advanced Studies of the National Polytechnic Institute
| | - Angélica Silva Olivares
- Department of Infectomics and Molecular Pathogenesis, Center for Research and Advanced Studies of the National Polytechnic Institute
| | - Mineko Shibayama
- Department of Infectomics and Molecular Pathogenesis, Center for Research and Advanced Studies of the National Polytechnic Institute
| | - Michael Schnoor
- Department of Molecular Biomedicine, Center for Research and Advanced Studies of the National Polytechnic Institute;
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96
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Gobert AP, Sagrestani G, Delmas E, Wilson KT, Verriere TG, Dapoigny M, Del'homme C, Bernalier-Donadille A. The human intestinal microbiota of constipated-predominant irritable bowel syndrome patients exhibits anti-inflammatory properties. Sci Rep 2016; 6:39399. [PMID: 27982124 PMCID: PMC5159846 DOI: 10.1038/srep39399] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Accepted: 11/23/2016] [Indexed: 12/19/2022] Open
Abstract
The intestinal microbiota of patients with constipated-predominant irritable bowel syndrome (C-IBS) displays chronic dysbiosis. Our aim was to determine whether this microbial imbalance instigates perturbation of the host intestinal mucosal immune response, using a model of human microbiota-associated rats (HMAR) and dextran sulfate sodium (DSS)-induced experimental colitis. The analysis of the microbiota composition revealed a decrease of the relative abundance of Bacteroides, Roseburia-Eubacterium rectale and Bifidobacterium and an increase of Enterobacteriaceae, Desulfovibrio sp., and mainly Akkermansia muciniphila in C-IBS patients compared to healthy individuals. The bacterial diversity of the gut microbiota of healthy individuals or C-IBS patients was maintained in corresponding HMAR. Animals harboring a C-IBS microbiota had reduced DSS colitis with a decreased expression of pro-inflammatory cytokines from innate, Th1, and Th17 responses. The pre-treatment of conventional C57BL/6 mice or HMAR with A. muciniphila, but not with Escherichia coli, prior exposure to DSS also resulted in a reduction of colitis severity, highlighting that the anti-inflammatory effect of the gut microbiota of C-IBS patients is mediated, in part, by A. muciniphila. This work highlights a novel aspect of the crosstalk between the gut microbiota of C-IBS patients and host intestinal homeostasis.
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Affiliation(s)
- Alain P Gobert
- Institut National de la Recherche Agronomique (INRA), UR454 Microbiologie, Saint-Genès-Champanelle, France.,Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA.,Center for Mucosal Inflammation and Cancer, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Giulia Sagrestani
- Institut National de la Recherche Agronomique (INRA), UR454 Microbiologie, Saint-Genès-Champanelle, France
| | - Eve Delmas
- Institut National de la Recherche Agronomique (INRA), UR454 Microbiologie, Saint-Genès-Champanelle, France
| | - Keith T Wilson
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA.,Center for Mucosal Inflammation and Cancer, Vanderbilt University Medical Center, Nashville, Tennessee, USA.,Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA.,Department of Cancer Biology, Vanderbilt University Medical Center, Nashville, Tennessee, USA.,Veterans Affairs Tennessee Valley Healthcare System, Nashville, Tennessee, USA
| | - Thomas G Verriere
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Michel Dapoigny
- CHU Clermont-Ferrand, Service de Médecine Digestive et Hépatobiliaire, Hôpital Estaing, Clermont-Ferrand, France
| | - Christophe Del'homme
- Institut National de la Recherche Agronomique (INRA), UR454 Microbiologie, Saint-Genès-Champanelle, France
| | - Annick Bernalier-Donadille
- Institut National de la Recherche Agronomique (INRA), UR454 Microbiologie, Saint-Genès-Champanelle, France
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97
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QseC inhibition as an antivirulence approach for colitis-associated bacteria. Proc Natl Acad Sci U S A 2016; 114:142-147. [PMID: 27980034 DOI: 10.1073/pnas.1612836114] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Hosts and their microbes have established a sophisticated communication system over many millennia. Within mammalian hosts, this dynamic cross-talk is essential for maintaining intestinal homeostasis. In a genetically susceptible host, dysbiosis of the gut microbiome and dysregulated immune responses are central to the development of inflammatory bowel disease (IBD). Previous surveys of stool from the T-bet-/-Rag2-/- IBD mouse model revealed microbial features that discriminate between health and disease states. Enterobacteriaceae expansion and increased gene abundances for benzoate degradation, two-component systems, and bacterial motility proteins pointed to the potential involvement of a catecholamine-mediated bacterial signaling axis in colitis pathogenesis. Enterobacteriaceae sense and respond to microbiota-generated signals and host-derived catecholamines through the two-component quorum-sensing Escherichia coli regulators B and C (QseBC) system. On signal detection, QseC activates a cascade to induce virulence gene expression. Although a single pathogen has not been identified as a causative agent in IBD, adherent-invasive Escherichia coli (AIEC) have been implicated. Flagellar expression is necessary for the IBD-associated AIEC strain LF82 to establish colonization. Thus, we hypothesized that qseC inactivation could reduce LF82's virulence, and found that an absence of qseC leads to down-regulated flagellar expression and motility in vitro and reduced colonization in vivo. We extend these findings on the potential of QseC-based IBD therapeutics to three preclinical IBD models, wherein we observe that QseC blockade can effectively modulate colitogenic microbiotas to reduce intestinal inflammation. Collectively, our data support a role for QseC-mediated bacterial signaling in IBD pathogenesis and indicate that QseC inhibition may be a useful microbiota-targeted approach for disease management.
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98
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Apple peel polyphenols: a key player in the prevention and treatment of experimental inflammatory bowel disease. Clin Sci (Lond) 2016; 130:2217-2237. [DOI: 10.1042/cs20160524] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Accepted: 09/14/2016] [Indexed: 12/11/2022]
Abstract
Diets rich in fruits and vegetables may reduce oxidative stress (OxS) and inflammation via several mechanisms. These beneficial effects may be due to their high polyphenol content. The aims of the present study are to evaluate the preventive and therapeutic aspects of polyphenols in dried apple peel powder (DAPP) on intestinal inflammation while elucidating the underlying mechanisms and clinical benefits. Induction of intestinal inflammation in mice was performed by oral administration of the inflammatory agent dextran sulfate sodium (DSS) at 2.5% for 10 days. Physiological and supraphysiological doses of DAPP (200 and 400 mg/kg/day respectively) were administered by gavage for 10 days pre- and post-DSS treatment. DSS-mediated inflammation caused weight loss, shortening of the colon, dystrophic detachment of the epithelium, and infiltration of mono- and poly-morphonuclear cells in the colon. DSS induced an increase in lipid peroxidation, a down-regulation of antioxidant enzymes, an augmented expression of myeloperoxidase (MPO) and cyclooxygenase-2 (COX-2), an elevated production of prostaglandin E2 (PGE2) and a shift in mucosa-associated microbial composition. However, DAPP normalized most of these abnormalities in preventive or therapeutic situations in addition to lowering inflammatory cytokines while stimulating antioxidant transcription factors and modulating other potential healing pathways. The supraphysiological dose of DAPP in therapeutic situations also improved mitochondrial dysfunction. Relative abundance of Peptostreptococcaceae and Enterobacteriaceae bacteria was slightly decreased in DAPP-treated mice. In conclusion, DAPP exhibits powerful antioxidant and anti-inflammatory action in the intestine and is associated with the regulation of cellular signalling pathways and changes in microbiota composition. Evaluation of preventive and therapeutic effects of DAPP may be clinically feasible in individuals with intestinal inflammatory bowel diseases.
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99
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Anti-Inflammatory Effects of Hyperbaric Oxygenation during DSS-Induced Colitis in BALB/c Mice Include Changes in Gene Expression of HIF-1α, Proinflammatory Cytokines, and Antioxidative Enzymes. Mediators Inflamm 2016; 2016:7141430. [PMID: 27656047 PMCID: PMC5021505 DOI: 10.1155/2016/7141430] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Revised: 07/08/2016] [Accepted: 07/12/2016] [Indexed: 12/21/2022] Open
Abstract
Reactive oxygen species (ROS) and nitrogen species have an indispensable role in regulating cell signalling pathways, including transcriptional control via hypoxia inducible factor-1α (HIF-1α). Hyperbaric oxygenation treatment (HBO2) increases tissue oxygen content and leads to enhanced ROS production. In the present study DSS-induced colitis has been employed in BALB/c mice as an experimental model of gut mucosa inflammation to investigate the effects of HBO2 on HIF-1α, antioxidative enzyme, and proinflammatory cytokine genes during the colonic inflammation. Here we report that HBO2 significantly reduces severity of DSS-induced colitis, as evidenced by the clinical features, histological assessment, impaired immune cell expansion and mobilization, and reversal of IL-1β, IL-2, and IL-6 gene expression. Gene expression and antioxidative enzyme activity were changed by the HBO2 and the inflammatory microenvironment in the gut mucosa. Strong correlation of HIF-1α mRNA level to GPx1, SOD1, and IL-6 mRNA expression suggests involvement of HIF-1α in transcriptional regulation of these genes during colonic inflammation and HBO2. This is further confirmed by a strong correlation of HIF-1α with known target genes VEGF and PGK1. Results demonstrate that HBO2 has an anti-inflammatory effect in DSS-induced colitis in mice, and this effect is at least partly dependent on expression of HIF-1α and antioxidative genes.
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100
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Enos RT, Velázquez KT, McClellan JL, Cranford TL, Nagarkatti M, Nagarkatti PS, Davis JM, Murphy EA. High-fat diets rich in saturated fat protect against azoxymethane/dextran sulfate sodium-induced colon cancer. Am J Physiol Gastrointest Liver Physiol 2016; 310:G906-19. [PMID: 27033117 PMCID: PMC4935479 DOI: 10.1152/ajpgi.00345.2015] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Accepted: 03/29/2016] [Indexed: 01/31/2023]
Abstract
High-fat-diet (HFD) consumption is associated with colon cancer risk. However, little is known about how the lipid composition of a HFD can influence prooncogenic processes. We examined the effects of three HFDs differing in the percentage of total calories from saturated fat (SF) (6, 12, and 24% of total caloric intake), but identical in total fat (40%), and a commercially available Western diet (26 and 41% saturated and total fat, respectively) on colon cancer development using the azoxymethane (AOM)/dextran sulfate sodium (DSS) murine model. A second dose-response experiment was performed using diets supplemented with the saturated-fatty-acid (SFA)-rich coconut oil. In experiment 1, we found an inverse association between SF content and tumor burden. Furthermore, increased SF content was associated with reduced inflammation, increased apoptosis, and decreased proliferation. The second dose-response experiment was performed to test whether this effect may be attributed to the SF content of the diets. Consistent with the initial experiment, we found that high SF content was protective, at least in male mice; there was a decrease in mortality in mice consuming the highest concentration of SFAs. To explore a potential mechanism for these findings, we examined colonic mucin 2 (Muc2) protein content and found that the HFDs with the highest SF content had the greatest concentration of Muc2. Our data suggest that high dietary SF is protective in the AOM/DSS model of colon cancer, which may be due, at least in part, to the ability of SF to maintain intestinal barrier integrity through increased colonic Muc2.
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Affiliation(s)
- Reilly T. Enos
- 1Department of Pathology, Microbiology & Immunology, School of Medicine, University of South Carolina, Columbia, South Carolina; and
| | - Kandy T. Velázquez
- 1Department of Pathology, Microbiology & Immunology, School of Medicine, University of South Carolina, Columbia, South Carolina; and
| | - Jamie L. McClellan
- 1Department of Pathology, Microbiology & Immunology, School of Medicine, University of South Carolina, Columbia, South Carolina; and
| | - Taryn L. Cranford
- 1Department of Pathology, Microbiology & Immunology, School of Medicine, University of South Carolina, Columbia, South Carolina; and
| | - Mitzi Nagarkatti
- 1Department of Pathology, Microbiology & Immunology, School of Medicine, University of South Carolina, Columbia, South Carolina; and
| | - Prakash S. Nagarkatti
- 1Department of Pathology, Microbiology & Immunology, School of Medicine, University of South Carolina, Columbia, South Carolina; and
| | - J. Mark Davis
- 2Department of Exercise Science, University of South Carolina, Columbia, South Carolina
| | - E. Angela Murphy
- 1Department of Pathology, Microbiology & Immunology, School of Medicine, University of South Carolina, Columbia, South Carolina; and
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