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Kant S, Liu L, Vazquez-Torres A. The methylglyoxal pathway is a sink for glutathione in Salmonella experiencing oxidative stress. PLoS Pathog 2023; 19:e1011441. [PMID: 37267419 DOI: 10.1371/journal.ppat.1011441] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 05/23/2023] [Indexed: 06/04/2023] Open
Abstract
Salmonella suffer the cytotoxicity of reactive oxygen species generated by the phagocyte NADPH oxidase in the innate host response. Periplasmic superoxide dismutases, catalases and hydroperoxidases detoxify superoxide and hydrogen peroxide (H2O2) synthesized in the respiratory burst of phagocytic cells. Glutathione also helps Salmonella combat the phagocyte NADPH oxidase; however, the molecular mechanisms by which this low-molecular-weight thiol promotes resistance of Salmonella to oxidative stress are currently unknown. We report herein that Salmonella undergoing oxidative stress transcriptionally and functionally activate the methylglyoxal pathway that branches off from glycolysis. Activation of the methylglyoxal pathway consumes a substantial proportion of the glutathione reducing power in Salmonella following exposure to H2O2. The methylglyoxal pathway enables Salmonella to balance glucose utilization with aerobic respiratory outputs. Salmonella take advantage of the metabolic flexibility associated with the glutathione-consuming methylglyoxal pathway to resist reactive oxygen species generated by the enzymatic activity of the phagocyte NADPH oxidase in macrophages and mice. Taken together, glutathione fosters oxidative stress resistance in Salmonella against the antimicrobial actions of the phagocyte NADPH oxidase by promoting the methylglyoxal pathway, an offshoot metabolic adaptation of glycolysis.
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Affiliation(s)
- Sashi Kant
- University of Colorado School of Medicine, Department of Immunology and Microbiology, Aurora, Colorado, United States of America
| | - Lin Liu
- University of Colorado School of Medicine, Department of Immunology and Microbiology, Aurora, Colorado, United States of America
| | - Andres Vazquez-Torres
- University of Colorado School of Medicine, Department of Immunology and Microbiology, Aurora, Colorado, United States of America
- Veterans Affairs, Eastern Colorado Health Care System, Aurora, Colorado, United States of America
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Wu Z, Pi G, Song W, Li Y. Investigation of the Expression Pattern and Functional Role of miR-10b in Intestinal Inflammation. Animals (Basel) 2023; 13:ani13071236. [PMID: 37048492 PMCID: PMC10093392 DOI: 10.3390/ani13071236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 03/27/2023] [Accepted: 03/31/2023] [Indexed: 04/05/2023] Open
Abstract
Implications of miRNAs for animal health management in livestock remain elusive. To identify suitable miRNAs as monitoring biomarkers, piglets were randomly selected for sampling on days 0, 1, 3, 7, and 14 post-weaning. The results show that miR-10b levels in the villus upper cells of the jejunum on days 3 and 7 were significantly lower than that on day 14 post-weaning and reduced by approximately 30% on day 3 and 55% on day 7 compared to day 0. In contrast, miR-10b in crypt cells decreased by approximately 82% on day 7 and 64% on day 14 compared with day 0. Next, miR-10 knockout mice and wild-type mice were subjected to dextran sulfate sodium (DSS) for 7 days. The findings demonstrate that mice lacking miR-10b were more susceptible to DSS administration, as demonstrated by worse survival, greater weight loss, more severe tissue damage, and increased intestinal permeability. Moreover, the increased disease severity was correlated with enhanced macrophage infiltration, coincident with significantly elevated pro-inflammatory mediators and immunoglobulins. Bioinformatic analysis further reveals that the enriched pathways were mainly involved in host immune responses, and Igtp was identified as a potential target of miR-10b. These findings may provide new strategies for future interventions for swine health and production.
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Affiliation(s)
- Zijuan Wu
- Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, Hunan Normal University, Changsha 410081, China
- Hunan Provincial Key Laboratory of Animal Intestinal Function and Regulation, Hunan Normal University, Changsha 410081, China
| | - Guolin Pi
- Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, Hunan Normal University, Changsha 410081, China
- Hunan Provincial Key Laboratory of Animal Intestinal Function and Regulation, Hunan Normal University, Changsha 410081, China
| | - Wenxin Song
- Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, Hunan Normal University, Changsha 410081, China
- Hunan Provincial Key Laboratory of Animal Intestinal Function and Regulation, Hunan Normal University, Changsha 410081, China
| | - Yali Li
- Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, Hunan Normal University, Changsha 410081, China
- Hunan Provincial Key Laboratory of Animal Intestinal Function and Regulation, Hunan Normal University, Changsha 410081, China
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Yan Y, Li Y, Lv M, Li W, Shi HN. Role of p40 phox in host defense against Citrobacter rodentium infection. FEBS Open Bio 2021; 11:1476-1486. [PMID: 33780601 PMCID: PMC8091579 DOI: 10.1002/2211-5463.13155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 03/11/2021] [Accepted: 03/26/2021] [Indexed: 11/25/2022] Open
Abstract
NADPH oxidase (NOX) is a membrane-bound enzyme complex that generates reactive oxygen species (ROS). Mutations in NOX subunit genes have been implicated in the pathogenesis of inflammatory bowel disease (IBD), indicating a crucial role for ROS in regulating host immune responses. In this study, we utilize genetically deficient mice to investigate whether defects in p40phox , one subunit of NOX, impair host immune response in the intestine and aggravate disease in an infection-based (Citrobacter rodentium) model of colitis. We show that p40phox deficiency does not increase susceptibility of mice to C. rodentium infection, as no differences in body weight loss, bacterial clearance, colonic pathology, cytokine production, or immune cell recruitment were observed between p40phox-/- and wild-type mice. Interestingly, higher IL-10 levels were observed in the supernatants of MLN cells and splenocytes isolated from infected p40phox -deficient mice. Further, a higher expression level of inducible nitric oxide synthase (iNOS) was also noted in mice lacking p40phox . In contrast to wild-type mice, p40phox-/- mice exhibited greater NO production after LPS or bacterial antigen re-stimulation. These results suggest that p40phox-/- mice do not develop worsened colitis. While the precise mechanisms are unclear, it may involve the observed alteration in cytokine responses and enhancement in levels of iNOS and NO.
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Affiliation(s)
- Yanyun Yan
- Hunan Provincial Key Laboratory of Animal Intestinal Function and RegulationCollege of Life SciencesHunan Normal UniversityChangshaChina
| | - Yali Li
- Hunan Provincial Key Laboratory of Animal Intestinal Function and RegulationCollege of Life SciencesHunan Normal UniversityChangshaChina
| | | | | | - Hai Ning Shi
- Mucosal Immunology and Biology Research CenterHarvard Medical SchoolMassachusetts General HospitalCharlestownMAUSA
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Martínez-Aguilar R, Romero-Pinedo S, Ruiz-Magaña MJ, Olivares EG, Ruiz-Ruiz C, Abadía-Molina AC. Menstrual blood-derived stromal cells modulate functional properties of mouse and human macrophages. Sci Rep 2020; 10:21389. [PMID: 33288796 PMCID: PMC7721726 DOI: 10.1038/s41598-020-78423-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Accepted: 11/24/2020] [Indexed: 12/24/2022] Open
Abstract
Menstrual blood-derived stromal cells (MenSCs) are emerging as a strong candidate for cell-based therapies due to their immunomodulatory properties. However, their direct impact on innate immune populations remains elusive. Since macrophages play a key role in the onset and development of inflammation, understanding MenSCs implication in the functional properties of these cells is required to refine their clinical effects during the treatment of inflammatory disorders. In this study, we assessed the effects that MenSCs had on the recruitment of macrophages and other innate immune cells in two mouse models of acute inflammation, a thioglycollate (TGC)-elicited peritonitis model and a monobacterial sepsis model. We found that, in the TGC model, MenSCs injection reduced the percentage of macrophages recruited to the peritoneum and promoted the generation of peritoneal immune cell aggregates. In the sepsis model, MenSCs exacerbated infection by diminishing the recruitment of macrophages and neutrophils to the site of infection and inducing defective bacterial clearance. Additional in vitro studies confirmed that co-culture with MenSCs impaired macrophage bactericidal properties, affecting bacterial killing and the production of reactive oxygen intermediates. Our findings suggest that MenSCs modulate the macrophage population and that this modulation must be taken into consideration when it comes to future clinical applications.
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Affiliation(s)
| | | | - M José Ruiz-Magaña
- Unidad de Inmunología, IBIMER, CIBM, Universidad de Granada, Granada, Spain
| | - Enrique G Olivares
- Departamento de Bioquímica y Biología Molecular III e Inmunología, Facultad de Medicina, Universidad de Granada, Granada, Spain.,Unidad de Gestión Clínica Laboratorios, Hospital Universitario Clínico San Cecilio, Granada, Spain
| | - Carmen Ruiz-Ruiz
- Unidad de Inmunología, IBIMER, CIBM, Universidad de Granada, Granada, Spain. .,Departamento de Bioquímica y Biología Molecular III e Inmunología, Facultad de Medicina, Universidad de Granada, Granada, Spain.
| | - Ana C Abadía-Molina
- Unidad de Inmunología, IBIMER, CIBM, Universidad de Granada, Granada, Spain. .,Departamento de Bioquímica y Biología Molecular III e Inmunología, Facultad de Medicina, Universidad de Granada, Granada, Spain.
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Mazumdar A, Haddad Y, Milosavljevic V, Michalkova H, Guran R, Bhowmick S, Moulick A. Peptide-Carbon Quantum Dots conjugate, Derived from Human Retinoic Acid Receptor Responder Protein 2, against Antibiotic-Resistant Gram Positive and Gram Negative Pathogenic Bacteria. NANOMATERIALS 2020; 10:nano10020325. [PMID: 32075033 PMCID: PMC7075150 DOI: 10.3390/nano10020325] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 02/10/2020] [Accepted: 02/11/2020] [Indexed: 11/25/2022]
Abstract
Antibiotic-resistant bacterial infections have become global issues for public health, which increases the utter need to develop alternatives to antibiotics. Here, the HSER (Homo sapiens retinoic acid receptor) peptide was designed from retinoic acid receptor responder protein 2 of Homo sapiens, and was conjugated with synthesized CQDs (carbon quantum dots) for enhanced antibacterial activity in combination, as individually they are not highly effective. The HSER–CQDs were characterized using spectrophotometer, HPLC coupled with electrospray-ionization quadrupole time-of-flight mass spectrometer (ESI–qTOF) mass spectrometer, zeta potential, zeta size, and FTIR. Thereafter, the antibacterial activity against Vancomycin-Resistant Staphylococcus aureus (VRSA) and Escherichia coli (carbapenem resistant) was studied using growth curve analysis, further supported by microscopic images showing the presence of cell debris and dead bacterial cells. The antibacterial mechanism of HSER–CQDs was observed to be via cell wall disruption and also interaction with gDNA (genomic DNA). Finally, toxicity test against normal human epithelial cells showed no toxicity, confirmed by microscopic analysis. Thus, the HSER–CQDs conjugate, having high stability and low toxicity with prominent antibacterial activity, can be used as a potential antibacterial agent.
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Affiliation(s)
- Aninda Mazumdar
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic; (Y.H.); (V.M.); (H.M.); (R.G.); (S.B.)
- Central European Institute of Technology, Brno University of Technology, Purkynova 123, CZ-612 00 Brno, Czech Republic
- Correspondence: or (A.M.); (A.M.)
| | - Yazan Haddad
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic; (Y.H.); (V.M.); (H.M.); (R.G.); (S.B.)
- Central European Institute of Technology, Brno University of Technology, Purkynova 123, CZ-612 00 Brno, Czech Republic
| | - Vedran Milosavljevic
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic; (Y.H.); (V.M.); (H.M.); (R.G.); (S.B.)
- Central European Institute of Technology, Brno University of Technology, Purkynova 123, CZ-612 00 Brno, Czech Republic
| | - Hana Michalkova
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic; (Y.H.); (V.M.); (H.M.); (R.G.); (S.B.)
| | - Roman Guran
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic; (Y.H.); (V.M.); (H.M.); (R.G.); (S.B.)
- Central European Institute of Technology, Brno University of Technology, Purkynova 123, CZ-612 00 Brno, Czech Republic
| | - Sukanya Bhowmick
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic; (Y.H.); (V.M.); (H.M.); (R.G.); (S.B.)
- Central European Institute of Technology, Brno University of Technology, Purkynova 123, CZ-612 00 Brno, Czech Republic
| | - Amitava Moulick
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic; (Y.H.); (V.M.); (H.M.); (R.G.); (S.B.)
- Central European Institute of Technology, Brno University of Technology, Purkynova 123, CZ-612 00 Brno, Czech Republic
- Correspondence: or (A.M.); (A.M.)
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Wu H, Ye L, Lu X, Xie S, Yang Q, Yu Q. Lactobacillus acidophilus Alleviated Salmonella-Induced Goblet Cells Loss and Colitis by Notch Pathway. Mol Nutr Food Res 2018; 62:e1800552. [PMID: 30198100 DOI: 10.1002/mnfr.201800552] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2018] [Revised: 09/06/2018] [Indexed: 12/24/2022]
Abstract
SCOPE The intestinal mucosal barrier, including the mucus layer, protects against invasion of enteropathogens, thereby inhibiting infection. In this study, the protective effect of Lactobacillus on the intestinal barrier against Salmonella infection is investigated. The underlying mechanism of its effect, specifically on the regulation of goblet cells through the Notch pathway, is also elucidated. METHODS AND RESULTS Here, the protective effect of Lactobacillus on alleviating changes in the intestinal barrier caused by Salmonella infection is explored. It has been found that Salmonella typhimurium colonizes the colon and damages colonic mucosa. However, Lactobacillus acidophilus ATCC 4356 alleviates the colitis caused by Salmonella infection. Moreover, S. typhimurium infection causes colonic crypt hyperplasia with increased PCNA+ cells, while L. acidophilus administration resolves these pathological changes. In addition, it has been further demonstrated that Salmonella results in severe colitis associated with goblet cells, and Lactobacillus improves colitis similarly associated with goblet cells. Salmonella infection induces goblet cell loss and reduces MUC2 expression by increasing Dll1, Dll4, and HES1 expression, while L. acidophilus reverses epithelial damage by balancing the Notch pathway. CONCLUSION The study demonstrates that colitis improvement is controlled by Lactobacillus ATCC 4356 by regulation of the Notch pathway; this finding will be useful for prevention against animal S. typhimurium infection.
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Affiliation(s)
- Haiqin Wu
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, No. 1 Weigang, Nanjing, Jiangsu, 210095, P. R. China
| | - Lulu Ye
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, No. 1 Weigang, Nanjing, Jiangsu, 210095, P. R. China
| | - Xiaoxi Lu
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, No. 1 Weigang, Nanjing, Jiangsu, 210095, P. R. China
| | - Shuang Xie
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, No. 1 Weigang, Nanjing, Jiangsu, 210095, P. R. China
| | - Qian Yang
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, No. 1 Weigang, Nanjing, Jiangsu, 210095, P. R. China
| | - Qinghua Yu
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, No. 1 Weigang, Nanjing, Jiangsu, 210095, P. R. China
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NADPH oxidases and ROS signaling in the gastrointestinal tract. Mucosal Immunol 2018; 11:1011-1023. [PMID: 29743611 DOI: 10.1038/s41385-018-0021-8] [Citation(s) in RCA: 128] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Revised: 02/15/2018] [Accepted: 02/19/2018] [Indexed: 02/04/2023]
Abstract
Reactive oxygen species (ROS), initially categorized as toxic by-products of aerobic metabolism, have often been called a double-edged sword. ROS are considered indispensable when host defense and redox signaling is concerned and a threat in inflammatory or degenerative diseases. This generalization does not take in account the diversity of oxygen metabolites being generated, their physicochemical characteristics and their production by distinct enzymes in space and time. NOX/DUOX NADPH oxidases are the only enzymes solely dedicated to ROS production and the prime ROS producer for intracellular and intercellular communication due to their widespread expression and intricate regulation. Here we discuss new insights of how NADPH oxidases act via ROS as multifaceted regulators of the intestinal barrier in homeostasis, infectious disease and intestinal inflammation. A closer look at monogenic VEOIBD and commensals as ROS source supports the view of H2O2 as key beneficial messenger in the barrier ecosystem.
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