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Liu B, Lin Q, Yang T, Zeng L, Shi L, Chen Y, Luo F. Oat β-glucan ameliorates dextran sulfate sodium (DSS)-induced ulcerative colitis in mice. Food Funct 2015; 6:3454-63. [PMID: 26292622 DOI: 10.1039/c5fo00563a] [Citation(s) in RCA: 82] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Ulcerative colitis is a major inflammatory bowel disease (IBD), characterized by inflammation within the gastrointestinal tract through chronic or relapsing immune system activation. The aim of this study is to investigate the potential protective effect of oat β-glucan (βG) against colitis induced by DSS in mice. Eighty mice were randomly divided into the control group (no DSS, no βG), DSS group (DSS only), DSS + L-βG group (DSS plus 500 mg per kg βG), and DSS + H-βG group (DSS plus 1000 mg per kg βG). Compared with the DSS group, administration of βG significantly reduced clinical symptoms with less weight loss, diarrhea and shortening of the colon, the severity of colitis was significantly inhibited as evidenced by the reduced disease activity index (DAI) and degree of histological damage in colon. Moreover, treatment with βG not only decreased myeloperoxidase activity (MPO), and nitric oxide (NO) and malondialdehyde (MDA) levels, but also inhibited mRNA and protein expression of pro-inflammatory factors such as TNF-α, IL-1β, IL-6 and iNOS. This suggests that oat βG in diet might exhibit an anti-inflammatory function against colitis through inhibition of expression of pro-inflammatory factors.
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Affiliation(s)
- Bo Liu
- Department of Molecular Nutrition, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, PR China.
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Mahmoud-Awny M, Attia AS, Abd-Ellah MF, El-Abhar HS. Mangiferin Mitigates Gastric Ulcer in Ischemia/ Reperfused Rats: Involvement of PPAR-γ, NF-κB and Nrf2/HO-1 Signaling Pathways. PLoS One 2015. [PMID: 26196679 PMCID: PMC4509761 DOI: 10.1371/journal.pone.0132497] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Mangiferin (MF), a xanthonoid from Mangifera indica, has been proved to have antisecretory and antioxidant gastroprotective effects against different gastric ulcer models; however, its molecular mechanism has not been previously elucidated. Therefore, the aim of this study was to test its modulatory effect on several signaling pathways using the ischemia/reperfusion model for the first time. Animals were treated with MF, omeprazole (OMP), and the vehicle. The mechanistic studies revealed that MF mediated its gastroprotective effect partly via inducing the expression of Nrf2, HO-1 and PPAR-γ along with downregulating that of NF-κB. Surprisingly, the effect of MF, especially the high dose, exceeded that mediated by OMP except for Nrf2. The molecular results were reflected on the biomarkers measured, where the antioxidant effect of MF was manifested by increasing total antioxidant capacity and glutathione, besides normalizing malondialdehyde level. Additionally, MF decreased the I/R-induced nitric oxide elevation, an effect that was better than that of OMP. In the serum, MF, dose dependently, enhanced endothelial nitric oxide synthase, while reduced the inducible isoform. Regarding the anti-inflammatory effect of MF, it reduced serum level of IL-1β and sE-selectin, effects that were mirrored on the tissue level of myeloperoxidase, the neutrophil infiltration marker. In addition, MF possessed an antiapoptotic character evidenced by elevating Bcl-2 level and reducing that of caspase-3 in a dose related order. As a conclusion, the intimated gastroprotective mechanisms of MF are mediated, partially, by modulation of oxidative stress, inflammation and apoptosis possibly via the Nrf2/HO-1, PPAR-γ/NF-κB signaling pathways.
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Affiliation(s)
- Magdy Mahmoud-Awny
- Department of Pharmacology & Toxicology, October University, Cairo, Egypt
| | - Ahmed S. Attia
- Department of Microbiology & Immunologyology, Cairo University, Cairo, Egypt
| | | | - Hanan Salah El-Abhar
- Department of Pharmacology & Toxicology, Cairo University, Cairo, Egypt
- * E-mail:
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108
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Zhang J, Ding L, Wang B, Ren G, Sun A, Deng C, Wei X, Mani S, Wang Z, Dou W. Notoginsenoside R1 attenuates experimental inflammatory bowel disease via pregnane X receptor activation. J Pharmacol Exp Ther 2014; 352:315-24. [PMID: 25472953 DOI: 10.1124/jpet.114.218750] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Notoginsenoside R1 (R1) is the main bioactive component in Panax notoginseng, an old herb medicine widely used in Asian countries in the treatment of microcirculatory diseases. However, little is known about the effect of R1 on inflammatory bowel disease (IBD). The present study demonstrated that R1 alleviated the severity of dextran sulfate sodium-induced colitis in mice by decreasing the activity of myeloperoxidase, the production of cytokines, the expression of proinflammatory genes, and the phosphorylation of IκB kinase, IκBα, and p65 in the colon. Further studies indicated that R1 dose-dependently activated human/mouse pregnane X receptor (PXR), a known target for decreasing inflammation in IBD, and upregulated the expression of genes involved in xenobiotic metabolism in colorectal cells and the colon. Ligand pocket-filling mutant (S247W/C284W or S247W/C284W/S208W) of the human PXR abrogated the effect of R1 on PXR activation. Time-resolved fluorescence resonance energy transfer PXR competitive binding assay confirmed R1 (ligand) binding affinity. In addition, PXR overexpression inhibited nuclear factor-κB (NF-κB)-luciferase activity, which was potentiated by R1 treatment. PXR knockdown by small interfering RNA demonstrated the necessity of PXR in R1-induced upregulation of the expression of xenobiotic-metabolizing enzymes and downregulation of NF-κB activity. Finally, the anti-inflammatory effect of R1 was confirmed in trinitrobenzene sulfonic acid-induced colitis in mice. These findings suggest that R1 attenuates experimental IBD possibly via the activation of intestinal PXR signaling.
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Affiliation(s)
- Jingjing Zhang
- Shanghai Key Laboratory of Complex Prescription and MOE Key Laboratory for Standardization of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China (J.Z., L.D., G.R., A.S., C.D., X.W., Z.W., W.D.); Department of Gastroenterology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China (B.W.); and Departments of Medicine and Genetics, Albert Einstein College of Medicine, Bronx, New York (S.M.)
| | - Lili Ding
- Shanghai Key Laboratory of Complex Prescription and MOE Key Laboratory for Standardization of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China (J.Z., L.D., G.R., A.S., C.D., X.W., Z.W., W.D.); Department of Gastroenterology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China (B.W.); and Departments of Medicine and Genetics, Albert Einstein College of Medicine, Bronx, New York (S.M.)
| | - Baocan Wang
- Shanghai Key Laboratory of Complex Prescription and MOE Key Laboratory for Standardization of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China (J.Z., L.D., G.R., A.S., C.D., X.W., Z.W., W.D.); Department of Gastroenterology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China (B.W.); and Departments of Medicine and Genetics, Albert Einstein College of Medicine, Bronx, New York (S.M.)
| | - Gaiyan Ren
- Shanghai Key Laboratory of Complex Prescription and MOE Key Laboratory for Standardization of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China (J.Z., L.D., G.R., A.S., C.D., X.W., Z.W., W.D.); Department of Gastroenterology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China (B.W.); and Departments of Medicine and Genetics, Albert Einstein College of Medicine, Bronx, New York (S.M.)
| | - Aning Sun
- Shanghai Key Laboratory of Complex Prescription and MOE Key Laboratory for Standardization of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China (J.Z., L.D., G.R., A.S., C.D., X.W., Z.W., W.D.); Department of Gastroenterology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China (B.W.); and Departments of Medicine and Genetics, Albert Einstein College of Medicine, Bronx, New York (S.M.)
| | - Chao Deng
- Shanghai Key Laboratory of Complex Prescription and MOE Key Laboratory for Standardization of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China (J.Z., L.D., G.R., A.S., C.D., X.W., Z.W., W.D.); Department of Gastroenterology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China (B.W.); and Departments of Medicine and Genetics, Albert Einstein College of Medicine, Bronx, New York (S.M.)
| | - Xiaohui Wei
- Shanghai Key Laboratory of Complex Prescription and MOE Key Laboratory for Standardization of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China (J.Z., L.D., G.R., A.S., C.D., X.W., Z.W., W.D.); Department of Gastroenterology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China (B.W.); and Departments of Medicine and Genetics, Albert Einstein College of Medicine, Bronx, New York (S.M.)
| | - Sridhar Mani
- Shanghai Key Laboratory of Complex Prescription and MOE Key Laboratory for Standardization of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China (J.Z., L.D., G.R., A.S., C.D., X.W., Z.W., W.D.); Department of Gastroenterology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China (B.W.); and Departments of Medicine and Genetics, Albert Einstein College of Medicine, Bronx, New York (S.M.)
| | - Zhengtao Wang
- Shanghai Key Laboratory of Complex Prescription and MOE Key Laboratory for Standardization of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China (J.Z., L.D., G.R., A.S., C.D., X.W., Z.W., W.D.); Department of Gastroenterology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China (B.W.); and Departments of Medicine and Genetics, Albert Einstein College of Medicine, Bronx, New York (S.M.)
| | - Wei Dou
- Shanghai Key Laboratory of Complex Prescription and MOE Key Laboratory for Standardization of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China (J.Z., L.D., G.R., A.S., C.D., X.W., Z.W., W.D.); Department of Gastroenterology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China (B.W.); and Departments of Medicine and Genetics, Albert Einstein College of Medicine, Bronx, New York (S.M.)
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