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Juszczuk-Kubiak E. Molecular Aspects of the Functioning of Pathogenic Bacteria Biofilm Based on Quorum Sensing (QS) Signal-Response System and Innovative Non-Antibiotic Strategies for Their Elimination. Int J Mol Sci 2024; 25:2655. [PMID: 38473900 DOI: 10.3390/ijms25052655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 02/21/2024] [Accepted: 02/22/2024] [Indexed: 03/14/2024] Open
Abstract
One of the key mechanisms enabling bacterial cells to create biofilms and regulate crucial life functions in a global and highly synchronized way is a bacterial communication system called quorum sensing (QS). QS is a bacterial cell-to-cell communication process that depends on the bacterial population density and is mediated by small signalling molecules called autoinducers (AIs). In bacteria, QS controls the biofilm formation through the global regulation of gene expression involved in the extracellular polymeric matrix (EPS) synthesis, virulence factor production, stress tolerance and metabolic adaptation. Forming biofilm is one of the crucial mechanisms of bacterial antimicrobial resistance (AMR). A common feature of human pathogens is the ability to form biofilm, which poses a serious medical issue due to their high susceptibility to traditional antibiotics. Because QS is associated with virulence and biofilm formation, there is a belief that inhibition of QS activity called quorum quenching (QQ) may provide alternative therapeutic methods for treating microbial infections. This review summarises recent progress in biofilm research, focusing on the mechanisms by which biofilms, especially those formed by pathogenic bacteria, become resistant to antibiotic treatment. Subsequently, a potential alternative approach to QS inhibition highlighting innovative non-antibiotic strategies to control AMR and biofilm formation of pathogenic bacteria has been discussed.
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Affiliation(s)
- Edyta Juszczuk-Kubiak
- Laboratory of Biotechnology and Molecular Engineering, Department of Microbiology, Prof. Wacław Dąbrowski Institute of Agricultural and Food Biotechnology-State Research Institute, Rakowiecka 36 Street, 02-532 Warsaw, Poland
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2
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Purtov YA, Ozoline ON. Neuromodulators as Interdomain Signaling Molecules Capable of Occupying Effector Binding Sites in Bacterial Transcription Factors. Int J Mol Sci 2023; 24:15863. [PMID: 37958845 PMCID: PMC10647483 DOI: 10.3390/ijms242115863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 10/29/2023] [Accepted: 10/30/2023] [Indexed: 11/15/2023] Open
Abstract
Hormones and neurotransmitters are important components of inter-kingdom signaling systems that ensure the coexistence of eukaryotes with their microbial community. Their ability to affect bacterial physiology, metabolism, and gene expression was evidenced by various experimental approaches, but direct penetration into bacteria has only recently been reported. This opened the possibility of considering neuromodulators as potential effectors of bacterial ligand-dependent regulatory proteins. Here, we assessed the validity of this assumption for the neurotransmitters epinephrine, dopamine, and norepinephrine and two hormones (melatonin and serotonin). Using flexible molecular docking for transcription factors with ligand-dependent activity, we assessed the ability of neuromodulators to occupy their effector binding sites. For many transcription factors, including the global regulator of carbohydrate metabolism, CRP, and the key regulator of lactose assimilation, LacI, this ability was predicted based on the analysis of several 3D models. By occupying the ligand binding site, neuromodulators can sterically hinder the interaction of the target proteins with the natural effectors or even replace them. The data obtained suggest that the direct modulation of the activity of at least some bacterial transcriptional factors by neuromodulators is possible. Therefore, the natural hormonal background may be a factor that preadapts bacteria to the habitat through direct perception of host signaling molecules.
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Affiliation(s)
- Yuri A. Purtov
- Department of Functional Genomics of Prokaryotes, Institute of Cell Biophysics of the Russian Academy of Sciences, Federal Research Center Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, Pushchino 142290, Russia
| | - Olga N. Ozoline
- Department of Functional Genomics of Prokaryotes, Institute of Cell Biophysics of the Russian Academy of Sciences, Federal Research Center Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, Pushchino 142290, Russia
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Aburahma A, Rana S, Larsen R, Ward CS, Sprague JE. Influence of adrenalectomy on the gut microbiome and MDMA-induced hyperthermia. Eur J Pharmacol 2023; 945:175643. [PMID: 36882148 DOI: 10.1016/j.ejphar.2023.175643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 02/28/2023] [Accepted: 03/02/2023] [Indexed: 03/07/2023]
Abstract
The increased use of the stimulant drug, 3,4-methylenedioxymethamphetamine (MDMA), more commonly known as Ecstasy, Molly or X, has been linked to the development of life-threatening hyperthermia in human and animal models. The current study aimed to investigate the role of the gut-adrenal axis in MDMA-induced hyperthermia by assessing the influence of the acute exogenous supplementation with norepinephrine (NE) or corticosterone (CORT) to adrenalectomized (ADX) rats following MDMA administration. MDMA (10 mg/kg, sc) resulted in significant increase of body temperature in SHAM animals compared to ADX animals at 30-, 60- and 90-min timepoints post-MDMA treatment. The attenuated MDMA-mediated hyperthermic response seen in ADX animals was partially restored by the exogenous administration of NE (3 mg/kg, ip) or CORT (3 mg/kg, ip) 30 min after MDMA treatment. Additionally, 16 S rRNA analysis revealed distinct changes in the gut microbiome composition and diversity notable by the higher abundance of minor phyla Actinobacteria, Verrucomicrobia and Proteobacteria in ADX rats compared to control and SHAM rats. Furthermore, MDMA administration resulted in marked changes in the dominant phyla Firmicutes and Bacteroidetes and minor phyla Actinobacteria, Verrucomicrobia and Proteobacteria in ADX animals. The most notable changes in the gut microbiome upon CORT treatment were reported with increase in Bacteroidetes and decrease in Firmicutes phyla whereas NE treatment resulted in increase in Firmicutes and decrease in Bacteroidetes and Proteobacteria post treatment. These results suggest a correlation between the sympathoadrenal axis, gut microbiome structure and diversity and MDMA-mediated hyperthermia.
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Affiliation(s)
- Amal Aburahma
- The Ohio Attorney General's Center for the Future of Forensic Science, USA
| | - Srishti Rana
- The Department of Biological Sciences, Bowling Green State University, Bowling Green, OH, 43403, USA
| | - Ray Larsen
- The Department of Biological Sciences, Bowling Green State University, Bowling Green, OH, 43403, USA
| | - Christopher S Ward
- The Department of Biological Sciences, Bowling Green State University, Bowling Green, OH, 43403, USA
| | - Jon E Sprague
- The Ohio Attorney General's Center for the Future of Forensic Science, USA.
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Scardaci R, Bietto F, Racine PJ, Boukerb AM, Lesouhaitier O, Feuilloley MGJ, Scutera S, Musso T, Connil N, Pessione E. Norepinephrine and Serotonin Can Modulate the Behavior of the Probiotic Enterococcus faecium NCIMB10415 towards the Host: Is a Putative Surface Sensor Involved? Microorganisms 2022; 10:microorganisms10030487. [PMID: 35336063 PMCID: PMC8954575 DOI: 10.3390/microorganisms10030487] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 02/12/2022] [Accepted: 02/16/2022] [Indexed: 01/27/2023] Open
Abstract
The human gut microbiota has co-evolved with humans by exchanging bidirectional signals. This study aims at deepening the knowledge of this crucial relationship by analyzing phenotypic and interactive responses of the probiotic Enterococcus faecium NCIMB10415 (E. faecium SF68) to the top-down signals norepinephrine (NE) and serotonin (5HT), two neuroactive molecules abundant in the gut. We treated E. faecium NCIMB10415 with 100 µM NE and 50 µM 5HT and tested its ability to form static biofilm (Confocal Laser Scanning Microscopy), adhere to the Caco-2/TC7 monolayer, affect the epithelial barrier function (Transepithelial Electrical Resistance) and human dendritic cells (DC) maturation, differentiation, and cytokines production. Finally, we evaluated the presence of a putative hormone sensor through in silico (whole genome sequence and protein modelling) and in vitro (Micro-Scale Thermophoresis) analyses. The hormone treatments increase biofilm formation and adhesion on Caco-2/TC7, as well as the epithelial barrier function. No differences concerning DC differentiation and maturation between stimulated and control bacteria were detected, while an enhanced TNF-α production was observed in NE-treated bacteria. Investigations on the sensor support the hypothesis that a two-component system on the bacterial surface can sense 5HT and NE. Overall, the data demonstrate that E. faecium NCIMB10415 can sense both NE and 5HT and respond accordingly.
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Affiliation(s)
- Rossella Scardaci
- Laboratory of Microbial Biochemistry and Proteomics, Department of Life Sciences and Systems Biology, University of Turin, Via Accademia Albertina 13, 10123 Torino, Italy; (F.B.); (E.P.)
- Correspondence:
| | - Francesca Bietto
- Laboratory of Microbial Biochemistry and Proteomics, Department of Life Sciences and Systems Biology, University of Turin, Via Accademia Albertina 13, 10123 Torino, Italy; (F.B.); (E.P.)
| | - Pierre-Jean Racine
- Laboratory of Microbiology—Bacterial Communication and Anti-infectious Strategies, University of Rouen Normandy, 27000 Evreux, France; (P.-J.R.); (A.M.B.); (O.L.); (M.G.J.F.); (N.C.)
| | - Amine M. Boukerb
- Laboratory of Microbiology—Bacterial Communication and Anti-infectious Strategies, University of Rouen Normandy, 27000 Evreux, France; (P.-J.R.); (A.M.B.); (O.L.); (M.G.J.F.); (N.C.)
| | - Olivier Lesouhaitier
- Laboratory of Microbiology—Bacterial Communication and Anti-infectious Strategies, University of Rouen Normandy, 27000 Evreux, France; (P.-J.R.); (A.M.B.); (O.L.); (M.G.J.F.); (N.C.)
| | - Marc G. J. Feuilloley
- Laboratory of Microbiology—Bacterial Communication and Anti-infectious Strategies, University of Rouen Normandy, 27000 Evreux, France; (P.-J.R.); (A.M.B.); (O.L.); (M.G.J.F.); (N.C.)
| | - Sara Scutera
- Laboratory of Immunology, Department of Public Health and Pediatric Sciences, University of Turin, Via Santena 9, 10126 Torino, Italy; (S.S.); (T.M.)
| | - Tiziana Musso
- Laboratory of Immunology, Department of Public Health and Pediatric Sciences, University of Turin, Via Santena 9, 10126 Torino, Italy; (S.S.); (T.M.)
| | - Nathalie Connil
- Laboratory of Microbiology—Bacterial Communication and Anti-infectious Strategies, University of Rouen Normandy, 27000 Evreux, France; (P.-J.R.); (A.M.B.); (O.L.); (M.G.J.F.); (N.C.)
| | - Enrica Pessione
- Laboratory of Microbial Biochemistry and Proteomics, Department of Life Sciences and Systems Biology, University of Turin, Via Accademia Albertina 13, 10123 Torino, Italy; (F.B.); (E.P.)
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Sharma VK, Akavaram S, Bayles DO. Genomewide transcriptional response of Escherichia coli O157:H7 to norepinephrine. BMC Genomics 2022; 23:107. [PMID: 35135480 PMCID: PMC8822769 DOI: 10.1186/s12864-021-08167-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 11/10/2021] [Indexed: 01/18/2023] Open
Abstract
Background Chemical signaling between a mammalian host and intestinal microbes is health and maintenance of ‘healthy’ intestinal microbiota. Escherichia coli O157:H7 can hijack host- and microbiota-produced chemical signals for survival in a harsh and nutritionally competitive gastrointestinal environment and for intestinal colonization. Norepinephrine (NE) produced by sympathetic neurons of the enteric nervous system has been shown in vitro to induce expression of genes controlling E. coli O157:H7 swimming motility, acid resistance, and adherence to epithelial cells. A previous study used a microarray approach to identify differentially expressed genes in E. coli O157:H7 strain EDL933 in response to NE. To elucidate a comprehensive transcriptional response to NE, we performed RNA-Seq on rRNA-depleted RNA of E. coli O157:H7 strain NADC 6564, an isolate of a foodborne E. coli O157:H7 strain 86–24. The reads generated by RNA-Seq were mapped to NADC 6564 genome using HiSat2. The mapped reads were quantified by htseq-count against the genome of strain NADC 6564. The differentially expressed genes were identified by analyzing quantified reads by DESeq2. Results Of the 585 differentially expressed genes (≥ 2.0-fold; p < 0.05), many encoded pathways promoting ability of E. coli O157:H7 strain NADC 6564 to colonize intestines of carrier animals and to produce disease in an incidental human host through increased adherence to epithelial cells and production of Shiga toxins. In addition, NE exposure also induced the expression of genes encoding pathways conferring prolonged survival at extreme acidity, controlling influx/efflux of specific nutrients/metabolites, and modulating tolerance to various stressors. A correlation was also observed between the EvgS/EvgA signal transduction system and the ability of bacterial cells to survive exposure to high acidity for several hours. Many genes involved in nitrogen, sulfur, and amino acid uptake were upregulated while genes linked to iron (Fe3+) acquisition and transport were downregulated. Conclusion The availability of physiological levels of NE in gastrointestinal tract could serve as an important cue for E. coli O157:H7 to engineer its virulence, stress, and metabolic pathways for colonization in reservoir animals, such as cattle, causing illness in humans, and surviving outside of a host. Supplementary Information The online version contains supplementary material available at 10.1186/s12864-021-08167-z.
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Affiliation(s)
- Vijay K Sharma
- Food Safety and Enteric Pathogens Research Unit, National Animal Disease Center, ARS-USDA, Ames, IA, 50010, USA.
| | - Suryatej Akavaram
- Food Safety and Enteric Pathogens Research Unit, National Animal Disease Center, ARS-USDA, Ames, IA, 50010, USA.,Current address: 4302 TX-332, Freeport, TX, 77541, USA
| | - Darrell O Bayles
- Infectious Bacterial Diseases Research Unit, National Animal Disease Center, ARS-USDA, Ames, IA, 50010, USA
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Beata S, Michał T, Mateusz O, Urszula W, Choroszy M, Andrzej T, Piotr D. Norepinephrine affects the interaction of adherent-invasive Escherichia coli with intestinal epithelial cells. Virulence 2021; 12:630-637. [PMID: 33538227 PMCID: PMC7872043 DOI: 10.1080/21505594.2021.1882780] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Norepinephrine (NE), the stress hormone, stimulates many bacterial species’ growth and virulence, including Escherichia coli. However, the hormone’s impact on the adherent-invasive E. coli (AIEC) implicated in Crohn’s disease is poorly understood. In the study, we have investigated the effect of NE on the interaction of six AIEC strains isolated from an intestinal biopsy from 6 children with Crohn’s disease with Caco-2 cells. Our study focused on type 1 fimbria and CEACAM6 molecules serving as docking sites for these adhesins. The study results demonstrated that the hormone significantly increased the adherence and invasion of AIEC to Caco-2 cells in vitro. However, the effect was not associated with the impact of NE on the increased proliferation rate of AIEC or the fimA gene expression vital for their interaction with intestinal epithelial cells. Instead, the carcinoembryonic antigen-related cell-adhesion-molecule-6 (CEACAM6) level was increased significantly in NE-treated Caco-2 cells infected with AIEC in contrast to control uninfected NE-treated cells. These results indicated that NE influenced the interaction of AIEC with intestinal epithelium by increasing the level of CEACAM6 in epithelial cells, strengthening their adherence and invasion.
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Affiliation(s)
| | - Turniak Michał
- Department of Microbiology, Wroclaw Medical University , Wroclaw, Poland
| | - Olbromski Mateusz
- Department of Histology and Embryology, Wroclaw Medical University , Wroclaw, Poland
| | - Walczuk Urszula
- Department of Microbiology, Wroclaw Medical University , Wroclaw, Poland
| | - Marcin Choroszy
- Department of Microbiology, Wroclaw Medical University , Wroclaw, Poland
| | - Tukiendorf Andrzej
- Department of Public Health, Wroclaw Medical University , Wroclaw, Poland
| | - Dzięgiel Piotr
- Department of Histology and Embryology, Wroclaw Medical University , Wroclaw, Poland
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Abstract
The new wave of anti-migraine agents is nothing less than a milestone in our battle to manage this devastating disease. However, concerns have recently increased regarding the safety of these drugs. CGRP, while known as a potent vasodilator, is also a key neural and immune modulator. The roles of CGRP in immune determination, have been studied in depth, with particular focus on its functional significance with respect to common immune challenges i.e., bacterial, viral, fungal and parasitic infections. This review discusses many potential areas of concern in regard to blocking CGRP function and its potential influence on immune milieus during infection, and the risk of adverse effects. Finally, this review recommends specific measures to be taken into consideration when administering anti-CGRP/CGRPR agents.
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8
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Cho JY, Liu R, Macbeth JC, Hsiao A. The Interface of Vibrio cholerae and the Gut Microbiome. Gut Microbes 2021; 13:1937015. [PMID: 34180341 PMCID: PMC8244777 DOI: 10.1080/19490976.2021.1937015] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Revised: 05/18/2021] [Accepted: 05/24/2021] [Indexed: 02/04/2023] Open
Abstract
The bacterium Vibrio cholerae is the etiologic agent of the severe human diarrheal disease cholera. The gut microbiome, or the native community of microorganisms found in the human gastrointestinal tract, is increasingly being recognized as a factor in driving susceptibility to infection, in vivo fitness, and host interactions of this pathogen. Here, we review a subset of the emerging studies in how gut microbiome structure and microbial function are able to drive V. cholerae virulence gene regulation, metabolism, and modulate host immune responses to cholera infection and vaccination. Improved mechanistic understanding of commensal-pathogen interactions offers new perspectives in the design of prophylactic and therapeutic approaches for cholera control.
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Affiliation(s)
- Jennifer Y. Cho
- Department of Microbiology and Plant Pathology, University of California, Riverside, CA, USA
- Department of Biochemistry, University of California, Riverside, California, USA
| | - Rui Liu
- Department of Microbiology and Plant Pathology, University of California, Riverside, CA, USA
- Graduate Program in Genetics, Genomics, and Bioinformatics, University of California, Riverside, California, USA
| | - John C. Macbeth
- Department of Microbiology and Plant Pathology, University of California, Riverside, CA, USA
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, California, USA
| | - Ansel Hsiao
- Department of Microbiology and Plant Pathology, University of California, Riverside, CA, USA
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Metabolomics profiling reveals defense strategies of Pediococcus pentosaceus R1 isolated from Harbin dry sausages under oxidative stress. Lebensm Wiss Technol 2021. [DOI: 10.1016/j.lwt.2020.110041] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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10
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The role of host molecules in communication with the resident and pathogenic microbiota: A review. MEDICINE IN MICROECOLOGY 2020. [DOI: 10.1016/j.medmic.2020.100005] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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11
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Baraketi A, D'Auria S, Shankar S, Fraschini C, Salmieri S, Menissier J, Lacroix M. Novel spider web trap approach based on chitosan/cellulose nanocrystals/glycerol membrane for the detection of Escherichia coli O157:H7 on food surfaces. Int J Biol Macromol 2020; 146:1009-1014. [DOI: 10.1016/j.ijbiomac.2019.09.225] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 09/23/2019] [Accepted: 09/26/2019] [Indexed: 12/14/2022]
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Sviridova AA, Kabaeva AR, Rogovskii VS, Kozhieva MK, Melnikov MV, Boyko AN. [Norepinephrine and intestinal microbiome in the early stages of demyelination: clinical-immunological parallels]. Zh Nevrol Psikhiatr Im S S Korsakova 2020; 119:28-34. [PMID: 31934986 DOI: 10.17116/jnevro20191191028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Biogenic amines are key mediators of neuroimmune interaction and may influence on multiple sclerosis (MS) pathogenesis and MS course. At the same time, the role of biogenic amines in immunoregulation of early stages of demyelination, in particular clinically isolated syndrome (CIS) and radiologically isolated syndrome (RIS) is still unclear. This literature review addresses a role of norepinephrine in the regulation of neuroimmune interactions in the early stages of the demyelination. Neuropsychological disorders, immunological characteristics, gut-brain axis as well as the role of norepinephrine in these interactions in patients with CIS, RIS and early MS are discussed.
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Affiliation(s)
- A A Sviridova
- Pirogov Russian National Research Medical University, Moscow, Russia; Federal Center of Cerebrovascular Pathology and Stroke, Moscow, Russia
| | - A R Kabaeva
- Pirogov Russian National Research Medical University, Moscow, Russia
| | - V S Rogovskii
- Pirogov Russian National Research Medical University, Moscow, Russia
| | - M Kh Kozhieva
- Pirogov Russian National Research Medical University, Moscow, Russia
| | - M V Melnikov
- Pirogov Russian National Research Medical University, Moscow, Russia; Federal Center of Cerebrovascular Pathology and Stroke, Moscow, Russia; Institute of Immunology, Laboratory of Clinical Immunology, Moscow, Russia
| | - A N Boyko
- Pirogov Russian National Research Medical University, Moscow, Russia; Federal Center of Cerebrovascular Pathology and Stroke, Moscow, Russia
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Abstract
PURPOSE OF THE REVIEW As the science of the microbiome advances, social epidemiologists can contribute to understanding how the broader social environment shapes the microbiome over the life course. This review summarizes current research and describes potential mechanisms of the social epidemiology of the microbiome. RECENT FINDINGS Most existing literature linking the social environment and the microbiome comes from animal models, focused on the impact of social interactions and psychosocial stress. Suggestive evidence of the importance of early life exposures, health behaviors, and the built environment also point to the importance of the social environment for the microbiome in humans. SUMMARY Social epidemiology as a field is well poised to contribute expertise in theory and measurement of the broader social environment to this new area, and to consider both the upstream and downstream mechanisms by which this environment gets "under the skin" and "into the gut." As population-level microbiome data becomes increasingly available, we encourage investigation of the multi-level determinants of the microbiome and how the microbiome may link the social environment and health.
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Affiliation(s)
- Jennifer Beam Dowd
- Department of Global Health and Social Medicine, King’s College London, The Strand, London, WC2R 2LS UK
- Epidemiology and Biostatistics, CUNY Graduate School of Public Health and Health Policy, 55 W 125th St, New York, NY 10027 USA
| | - Audrey Renson
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, 135 Dauer Dr, Chapel Hill, NC 27599 USA
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Taj A, Jamil N. Bioconversion of Tyrosine and Tryptophan Derived Biogenic Amines by Neuropathogenic Bacteria. Biomolecules 2018; 8:E10. [PMID: 29438351 PMCID: PMC5871979 DOI: 10.3390/biom8010010] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Revised: 09/21/2017] [Accepted: 09/22/2017] [Indexed: 01/09/2023] Open
Abstract
The biochemical potential of pathogenic bacteria may cause alteration in the neurophysiological environment; consequently, neuroendocrine and immune responses of the host are modulated by endogenously produced metabolic products of neuropathogenic bacteria. The present study was designed to detect the derived biogenic amines in spent culture media of Bacillus cereus (Bc), Clostridium tetani (Ct), Listeria monocytogenes (Lm), and Neisseria meningitidis (Nm). Overnight grown culture in different culture media i.e., Nutrient broth (NB), Luria basal broth (LB), Brain Heart Infusion broth (BHI), and human serum supplemented RPMI 1640 medium (RPMI) were used to prepare filter-sterilized, cell-free cultural broths (SCFBs) and subjected to high performance liquid chromatography with electrochemical detection (HPLC-EC) along with the control SCFBs. Comparative analysis of biogenic amines in neuropathogenic bacterial SCFBs with their respective control (SCFB) revealed the complete degradation of dopamine (DA) into its metabolic products by Bc, Ct, and Nm, whereas Lm showed negligible degradation of DA. A relatively high concentration of 5-hydroxyindol acetic acid (5HIAA) by Bc in NB and LB indicated the tryptophan metabolism by the serotonin (5HT) pathway. Our study suggests that microbial endocrinology could help unravel new perspectives to the progression of infectious diseases.
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Affiliation(s)
- Aneela Taj
- Department of Microbiology, University of Karachi, Karachi 75270, Pakistan.
| | - Nusrat Jamil
- Department of Microbiology, University of Karachi, Karachi 75270, Pakistan.
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15
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Pasupuleti S, Sule N, Manson MD, Jayaraman A. Conversion of Norepinephrine to 3,4-Dihdroxymandelic Acid in Escherichia coli Requires the QseBC Quorum-Sensing System and the FeaR Transcription Factor. J Bacteriol 2018; 200:e00564-17. [PMID: 29038253 PMCID: PMC5717157 DOI: 10.1128/jb.00564-17] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2017] [Accepted: 10/03/2017] [Indexed: 12/20/2022] Open
Abstract
The detection of norepinephrine (NE) as a chemoattractant by Escherichia coli strain K-12 requires the combined action of the TynA monoamine oxidase and the FeaB aromatic aldehyde dehydrogenase. The role of these enzymes is to convert NE into 3,4-dihydroxymandelic acid (DHMA), which is a potent chemoattractant sensed by the Tsr chemoreceptor. These two enzymes must be induced by prior exposure to NE, and cells that are exposed to NE for the first time initially show minimal chemotaxis toward it. The induction of TynA and FeaB requires the QseC quorum-sensing histidine kinase, and the signaling cascade requires new protein synthesis. Here, we demonstrate that the cognate response regulator for QseC, the transcription factor QseB, is also required for induction. The related quorum-sensing kinase QseE appears not to be part of the signaling pathway, but its cognate response regulator, QseF, which is also a substrate for phosphotransfer from QseC, plays a nonessential role. The promoter of the feaR gene, which encodes a transcription factor that has been shown to be essential for the expression of tynA and feaB, has two predicted QseB-binding sites. One of these sites appears to be in an appropriate position to stimulate transcription from the P1 promoter of the feaR gene. This study unites two well-known pathways: one for expression of genes regulated by catecholamines (QseBC) and one for expression of genes required for metabolism of aromatic amines (FeaR, TynA, and FeaB). This cross talk allows E. coli to convert the host-derived and chemotactically inert NE into the potent bacterial chemoattractant DHMA.IMPORTANCE The chemotaxis of E. coli K-12 to norepinephrine (NE) requires the conversion of NE to 3,4-dihydroxymandleic acid (DHMA), and DHMA is both an attractant and inducer of virulence gene expression for a pathogenic enterohemorrhagic E. coli (EHEC) strain. The induction of virulence by DHMA and NE requires QseC. The results described here show that the cognate response regulator for QseC, QseB, is also required for conversion of NE into DHMA. Production of DHMA requires induction of a pathway involved in the metabolism of aromatic amines. Thus, the QseBC sensory system provides a direct link between virulence and chemotaxis, suggesting that chemotaxis to host signaling molecules may require that those molecules are first metabolized by bacterial enzymes to generate the actual chemoattractant.
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Affiliation(s)
- Sasikiran Pasupuleti
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas, USA
| | - Nitesh Sule
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas, USA
| | - Michael D Manson
- Department of Biology, Texas A&M University, College Station, Texas, USA
| | - Arul Jayaraman
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas, USA
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16
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Volgers C, Savelkoul PHM, Stassen FRM. Gram-negative bacterial membrane vesicle release in response to the host-environment: different threats, same trick? Crit Rev Microbiol 2017; 44:258-273. [PMID: 28741415 DOI: 10.1080/1040841x.2017.1353949] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Bacteria are confronted with a multitude of stressors when occupying niches within the host. These stressors originate from host defense mechanisms, other bacteria during niche competition or result from physiological challenges such as nutrient limitation. To counteract these stressors, bacteria have developed a stress-induced network to mount the adaptations required for survival. These stress-induced adaptations include the release of membrane vesicles from the bacterial envelope. Membrane vesicles can provide bacteria with a plethora of immediate and ultimate benefits for coping with environmental stressors. This review addresses how membrane vesicles aid Gram-negative bacteria to cope with host-associated stress factors, focusing on vesicle biogenesis and the physiological functions. As many of the pathways, that drive vesicle biogenesis, confer we propose that shedding of membrane vesicles by Gram-negative bacteria entails an integrated part of general stress responses.
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Affiliation(s)
- Charlotte Volgers
- a Department of Medical Microbiology, School of Nutrition and Translational Research in Metabolism (NUTRIM) , Maastricht University Medical Centre , Maastricht , The Netherlands
| | - Paul H M Savelkoul
- a Department of Medical Microbiology, School of Nutrition and Translational Research in Metabolism (NUTRIM) , Maastricht University Medical Centre , Maastricht , The Netherlands.,b Department of Medical Microbiology and Infection Control , VU University Medical Center , Amsterdam , The Netherlands
| | - Frank R M Stassen
- a Department of Medical Microbiology, School of Nutrition and Translational Research in Metabolism (NUTRIM) , Maastricht University Medical Centre , Maastricht , The Netherlands
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17
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N'Diaye A, Gannesen A, Borrel V, Maillot O, Enault J, Racine PJ, Plakunov V, Chevalier S, Lesouhaitier O, Feuilloley MGJ. Substance P and Calcitonin Gene-Related Peptide: Key Regulators of Cutaneous Microbiota Homeostasis. Front Endocrinol (Lausanne) 2017; 8:15. [PMID: 28194136 PMCID: PMC5277020 DOI: 10.3389/fendo.2017.00015] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Accepted: 01/16/2017] [Indexed: 12/20/2022] Open
Abstract
Neurohormones diffuse in sweat and epidermis leading skin bacterial microflora to be largely exposed to these host factors. Bacteria can sense a multitude of neurohormones, but their role in skin homeostasis was only investigated recently. The first study focused on substance P (SP), a neuropeptide produced in abundance by skin nerve terminals. SP is without effect on the growth of Gram-positive (Bacillus cereus, Staphylococcus aureus, and Staphylococcus epidermidis) and Gram-negative (Pseudomonas fluorescens) bacteria. However, SP is stimulating the virulence of Bacillus and Staphylococci. The action of SP is highly specific with a threshold below the nanomolar level. Mechanisms involved in the response to SP are different between bacteria although they are all leading to increased adhesion and/or virulence. The moonlighting protein EfTu was identified as the SP-binding site in B. cereus and Staphylococci. In skin nerve terminals, SP is co-secreted with the calcitonin gene-related peptide (CGRP), which was shown to modulate the virulence of S. epidermidis. This effect is antagonized by SP. Identification of the CGRP sensor, DnaK, allowed understanding this phenomenon as EfTu and DnaK are apparently exported from the bacterium through a common system before acting as SP and CGRP sensors. Many other neuropeptides are expressed in skin, and their potential effects on skin bacteria remain to be investigated. Integration of these host signals by the cutaneous microbiota now appears as a key parameter in skin homeostasis.
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Affiliation(s)
- Awa N'Diaye
- Laboratory of Microbiology Signals and Microenvironment (LMSM), Normandie Université Rouen , Evreux , France
| | - Andrei Gannesen
- Laboratory of Microbiology Signals and Microenvironment (LMSM), Normandie Université Rouen, Evreux, France; Winogradsky Institute of Microbiology, Research Center of Biotechnology of Russian Academy of Science, Moscow, Russia
| | - Valérie Borrel
- Laboratory of Microbiology Signals and Microenvironment (LMSM), Normandie Université Rouen , Evreux , France
| | - Olivier Maillot
- Laboratory of Microbiology Signals and Microenvironment (LMSM), Normandie Université Rouen , Evreux , France
| | - Jeremy Enault
- Laboratory of Microbiology Signals and Microenvironment (LMSM), Normandie Université Rouen , Evreux , France
| | - Pierre-Jean Racine
- Laboratory of Microbiology Signals and Microenvironment (LMSM), Normandie Université Rouen , Evreux , France
| | - Vladimir Plakunov
- Winogradsky Institute of Microbiology, Research Center of Biotechnology of Russian Academy of Science , Moscow , Russia
| | - Sylvie Chevalier
- Laboratory of Microbiology Signals and Microenvironment (LMSM), Normandie Université Rouen , Evreux , France
| | - Olivier Lesouhaitier
- Laboratory of Microbiology Signals and Microenvironment (LMSM), Normandie Université Rouen , Evreux , France
| | - Marc G J Feuilloley
- Laboratory of Microbiology Signals and Microenvironment (LMSM), Normandie Université Rouen , Evreux , France
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18
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Dong Y, Liu J, Pang M, Du H, Wang N, Awan F, Lu C, Liu Y. Catecholamine-Stimulated Growth of Aeromonas hydrophila Requires the TonB2 Energy Transduction System but Is Independent of the Amonabactin Siderophore. Front Cell Infect Microbiol 2016; 6:183. [PMID: 28018865 PMCID: PMC5149522 DOI: 10.3389/fcimb.2016.00183] [Citation(s) in RCA: 13] [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: 07/11/2016] [Accepted: 11/28/2016] [Indexed: 01/19/2023] Open
Abstract
The growth-stimulating effects of catecholamine stress hormones have been demonstrated in many pathogens. However, catecholamine-induced growth and its underlying mechanisms remain poorly understood in Aeromonas hydrophila. The present study sought to demonstrate that norepinephrine (NE), epinephrine (Epi), dopamine (Dopa), and L-dopa stimulate the growth of A. hydrophila in iron-restricted media containing serum. NE exhibited the strongest growth stimulation, which could be blocked by adrenergic antagonists. Furthermore, it was demonstrated that NE could sequester iron from transferrin, thereby providing a more accessible iron source for utilization by A. hydrophila. The deletion of the amoA gene associated with amonabactin synthesis revealed that the amonabactin siderophore is not required for NE-stimulated growth. However, the deletion of the TonB2 energy transduction system resulted in the loss of growth promotion by NE, indicating that a specific TonB-dependent outer membrane receptor might be involved in the transport of iron from transferrin. Collectively, our data show that catecholamine sensing promotes the growth of A. hydrophila in a manner that is dependent on the TonB2 energy transduction system.
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Affiliation(s)
- Yuhao Dong
- Department of Preventive Veterinary, College of Veterinary Medicine, Nanjing Agricultural UniversityNanjing, China
| | - Jin Liu
- Department of Preventive Veterinary, College of Veterinary Medicine, Nanjing Agricultural UniversityNanjing, China
| | - Maoda Pang
- Department of Preventive Veterinary, College of Veterinary Medicine, Nanjing Agricultural UniversityNanjing, China
- Key Lab of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding Base, Institute of Food Safety, Jiangsu Academy of Agricultural SciencesNanjing, China
| | - Hechao Du
- Department of Preventive Veterinary, College of Veterinary Medicine, Nanjing Agricultural UniversityNanjing, China
| | - Nannan Wang
- Department of Preventive Veterinary, College of Veterinary Medicine, Nanjing Agricultural UniversityNanjing, China
| | - Furqan Awan
- Department of Preventive Veterinary, College of Veterinary Medicine, Nanjing Agricultural UniversityNanjing, China
| | - Chengping Lu
- Department of Preventive Veterinary, College of Veterinary Medicine, Nanjing Agricultural UniversityNanjing, China
| | - Yongjie Liu
- Department of Preventive Veterinary, College of Veterinary Medicine, Nanjing Agricultural UniversityNanjing, China
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Inaba M, Matsuda N, Banno H, Jin W, Wachino JI, Yamada K, Kimura K, Arakawa Y. In vitro reduction of antibacterial activity of tigecycline against multidrug-resistant Acinetobacter baumannii with host stress hormone norepinephrine. Int J Antimicrob Agents 2016; 48:680-689. [PMID: 27842757 DOI: 10.1016/j.ijantimicag.2016.09.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Revised: 09/03/2016] [Accepted: 09/15/2016] [Indexed: 12/31/2022]
Abstract
The host stress hormone norepinephrine (NE), also called noradrenaline, is reported to augment bacterial growth and pathogenicity, but few studies have focused on the effect of NE on the activity of antimicrobials. The aim of this study was to clarify whether NE affects antimicrobial activity against multidrug-resistant Acinetobacter baumannii (MDR-AB). Time-kill studies of tigecycline (TIG) and colistin (COL) against MDR-AB as well as assays for factors contributing to antibiotic resistance were performed using MDR-AB clinical strains both in the presence and absence of 10 µM NE. In addition, expression of three efflux pump genes (adeB, adeJ and adeG) in the presence and absence of NE was analysed by quantitative reverse transcription PCR. Viable bacterial cell counts in TIG-supplemented medium containing NE were significantly increased compared with those in medium without NE. In contrast, NE had little influence on viable bacterial cell counts in the presence of COL. NE-supplemented medium resulted in an ca. 2 log increase in growth and in bacterial cell numbers adhering on polyurethane, silicone and polyvinylchloride surfaces. Amounts of biofilm in the presence of NE were ca. 3-fold higher than without NE. Expression of the adeG gene was upregulated 4-6-fold in the presence of NE. In conclusion, NE augmented factors contributing to antibiotic resistance and markedly reduced the in vitro antibacterial activity of TIG against MDR-AB. These findings suggest that NE treatment may contribute to the failure of TIG therapy in patients with MDR-AB infections.
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Affiliation(s)
- Masato Inaba
- Department of Emergency & Critical Care Medicine, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi 466-8550, Japan; Department of Bacteriology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi 466-8550, Japan
| | - Naoyuki Matsuda
- Department of Emergency & Critical Care Medicine, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi 466-8550, Japan
| | - Hirotsugu Banno
- Department of Bacteriology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi 466-8550, Japan
| | - Wanchun Jin
- Department of Bacteriology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi 466-8550, Japan
| | - Jun-Ichi Wachino
- Department of Bacteriology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi 466-8550, Japan
| | - Keiko Yamada
- Department of Bacteriology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi 466-8550, Japan
| | - Kouji Kimura
- Department of Bacteriology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi 466-8550, Japan
| | - Yoshichika Arakawa
- Department of Bacteriology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi 466-8550, Japan.
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20
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Trueba AF, Ritz T, Trueba G. The Role of the Microbiome in the Relationship of Asthma and Affective Disorders. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2016; 874:263-88. [PMID: 26589224 DOI: 10.1007/978-3-319-20215-0_13] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The effect of stress, anxiety and other affective states on inflammatory conditions such as asthma is well documented. Although several immune pathway mechanisms have been proposed and studied, they cannot fully explain the relationship. In this chapter we present a new perspective on asthma development and exacerbation that integrates findings on the role of psychological factors in asthma with the microbiome and the hygiene hypothesis in asthma development.
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Affiliation(s)
- Ana F Trueba
- Universidad San Francisco de Quito, Quito, Ecuador.
| | - Thomas Ritz
- Southern Methodist University, Dallas, TX, USA.
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21
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Abstract
Chemical signaling between cells is an effective way to coordinate behavior within a community. Although cell-to-cell signaling has mostly been studied in single species, it is now appreciated that the sensing of chemical signals across kingdoms can be an important regulator of nutrient acquisition, virulence, and host defense. In this review, we focus on the role of interkingdom signaling in the interactions that occur between bacterial pathogens and their mammalian hosts. We discuss the quorum-sensing (QS) systems and other mechanisms used by these bacteria to sense, respond to, and modulate host signals that include hormones, immune factors, and nutrients. We also describe cross talk between these signaling pathways and strategies used by the host to interfere with bacterial signaling, highlighting the complex bidirectional signaling networks that are established across kingdoms.
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22
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Modulation of the Interaction of Enteric Bacteria with Intestinal Mucosa by Stress-Related Catecholamines. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2016; 874:143-66. [PMID: 26589217 DOI: 10.1007/978-3-319-20215-0_6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Stress associated with parturition, transport or mixing has long been correlated with enhanced faecal excretion of diarrhoeal zoonotic pathogens in animals such as Salmonella enterica and Escherichia coli. It may also predispose humans to infection and/or be associated with more severe outcomes. One possible explanation for this phenomenon is the ability of enteric bacterial pathogens to sense and respond to host stress-related catecholamines. This article reviews evidence of the ability of catecholamine hormones to modulate interactions between Gram-negative diarrhoeal pathogens and intestinal mucosa, as well as the molecular mechanisms that may be at work.
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23
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Interkingdom Chemical Signaling in Enterohemorrhagic Escherichia coli O157:H7. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2016; 874:201-13. [DOI: 10.1007/978-3-319-20215-0_9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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24
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Sandrini S, Aldriwesh M, Alruways M, Freestone P. Microbial endocrinology: host-bacteria communication within the gut microbiome. J Endocrinol 2015; 225:R21-34. [PMID: 25792117 DOI: 10.1530/joe-14-0615] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 03/16/2015] [Indexed: 12/28/2022]
Abstract
The human body is home to trillions of micro-organisms, which are increasingly being shown to have significant effects on a variety of disease states. Evidence exists that a bidirectional communication is taking place between us and our microbiome co-habitants, and that this dialogue is capable of influencing our health in a variety of ways. This review considers how host hormonal signals shape the microbiome, and what in return the microbiome residents may be signalling to their hosts.
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Affiliation(s)
- Sara Sandrini
- Department of Infection Immunity and Inflammation, University of Leicester, Maurice Shock Medical Sciences Building, University Road, Leicester LE1 9HN, UK
| | - Marwh Aldriwesh
- Department of Infection Immunity and Inflammation, University of Leicester, Maurice Shock Medical Sciences Building, University Road, Leicester LE1 9HN, UK
| | - Mashael Alruways
- Department of Infection Immunity and Inflammation, University of Leicester, Maurice Shock Medical Sciences Building, University Road, Leicester LE1 9HN, UK
| | - Primrose Freestone
- Department of Infection Immunity and Inflammation, University of Leicester, Maurice Shock Medical Sciences Building, University Road, Leicester LE1 9HN, UK
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25
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Li L, Chen Z, Bei W, Su Z, Huang Q, Zhang L, Chen H, Zhou R. Catecholamines promote Actinobacillus pleuropneumoniae growth by regulating iron metabolism. PLoS One 2015; 10:e0121887. [PMID: 25849041 PMCID: PMC4388731 DOI: 10.1371/journal.pone.0121887] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Accepted: 02/04/2015] [Indexed: 01/18/2023] Open
Abstract
Catecholamines are host stress hormones that can induce the growth of many bacteria by facilitating iron utilization and/or regulate the expression of virulence genes through specific hormone receptors. Whether these two responsive pathways are interconnected is unknown. In our previous study, it was found that catecholamines can regulate the expression of a great number of genes of Actinobacillus pleuropneumoniae, an important swine respiratory pathogen. However, bacterial growth was not affected by catecholamines in rich medium. In this study, it was discovered that catecholamines affected A. pleuropneumoniae growth in chemically defined medium (CDM). We found that serum inhibited A. pleuropneumoniae growth in CDM, while epinephrine, norepinephrine and dopamine promoted A. pleuropneumoniae growth in the CDM containing serum. The known bacterial hormone receptor QseC didn’t play roles in this process. Ion-supplementation and transcriptome analysis indicated that serum addition resulted in iron-restricted conditions which were alleviated by the addition of catecholamines. Transferrin, one of the components in serum, inhibited the growth of A. pleuropneumoniae in CDM, an effect reversed by addition of catecholamines in a TonB2-dependent manner. Our data demonstrate that catecholamines promote A. pleuropneumoniae growth by regulating iron-acquisition and metabolism, which is independent of the adrenergic receptor QseC.
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Affiliation(s)
- Lu Li
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
- * E-mail: (LL); (RZ)
| | - Zhaohui Chen
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
| | - Weicheng Bei
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
| | - Zhipeng Su
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
| | - Qi Huang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
| | - Liang Zhang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
| | - Huanchun Chen
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
| | - Rui Zhou
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
- * E-mail: (LL); (RZ)
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26
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Gur TL, Worly BL, Bailey MT. Stress and the commensal microbiota: importance in parturition and infant neurodevelopment. Front Psychiatry 2015; 6:5. [PMID: 25698977 PMCID: PMC4313583 DOI: 10.3389/fpsyt.2015.00005] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Accepted: 01/12/2015] [Indexed: 12/26/2022] Open
Abstract
The body is colonized by an enormous array of microbes that are collectively called the microbiota. During quiescent periods, microbial communities within the gut are relatively resistant to change. However, several factors that disrupt homeostasis can also significantly change gut microbial community structure. One factor that has been shown to change the composition of the gut microbiota is exposure to psychological stressors. Studies demonstrate that the commensal microbiota are involved in stressor-induced immunomodulation, but other biological effects are not yet known. This review discusses emerging evidence that the microbiota can impact the brain and behavior and indicates that stressor-induced alterations in the composition of gut microbial communities contribute to stressor-induced behavioral changes. This review will also discuss the evidence that such effects are most evident early in life, where both stress and the microbiota have been linked to birth outcomes, such as prematurity, and neurodevelopment. When considered together, a paradigm emerges in which stressor-induced alterations in commensal microbial populations significantly impact parturition and infant neurodevelopment.
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Affiliation(s)
- Tamar L Gur
- Psychiatry and Behavioral Health, The Ohio State University Wexner Medical Center , Columbus, OH , USA ; Department of Obstetrics and Gynecology, The Ohio State University Wexner Medical Center , Columbus, OH , USA ; Department of Neuroscience, The Ohio State University Wexner Medical Center , Columbus, OH , USA
| | - Brett L Worly
- Psychiatry and Behavioral Health, The Ohio State University Wexner Medical Center , Columbus, OH , USA ; Department of Obstetrics and Gynecology, The Ohio State University Wexner Medical Center , Columbus, OH , USA
| | - Michael T Bailey
- Division of Biosciences, College of Dentistry, The Ohio State University , Columbus, OH , USA ; Institute for Behavioral Medicine Research, The Ohio State University Wexner Medical Center , Columbus, OH , USA ; Department of Pediatrics, The Ohio State University Wexner Medical Center , Columbus, OH , USA ; Comprehensive Cancer Center, The Ohio State University Wexner Medical Center , Columbus, OH , USA
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27
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Zambelloni R, Marquez R, Roe AJ. Development of Antivirulence Compounds: A Biochemical Review. Chem Biol Drug Des 2014; 85:43-55. [DOI: 10.1111/cbdd.12430] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Revised: 08/20/2014] [Accepted: 08/26/2014] [Indexed: 01/09/2023]
Affiliation(s)
- Riccardo Zambelloni
- Institute of Infection Immunity and Inflammation; University of Glasgow; Sir Graeme Davies Building 120 University Place Glasgow G12 8TA UK
- Institute of Molecular and Cell Biology and Chemistry; University of Glasgow; Joseph Black Building Glasgow G12 8QQ UK
| | - Rudi Marquez
- Institute of Molecular and Cell Biology and Chemistry; University of Glasgow; Joseph Black Building Glasgow G12 8QQ UK
| | - Andrew J. Roe
- Institute of Molecular and Cell Biology and Chemistry; University of Glasgow; Joseph Black Building Glasgow G12 8QQ UK
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28
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Abstract
The neurophysiological response of an animal to stress involves the production of a number of stress-related neurochemicals including the catecholamines norepinephrine and epinephrine. It is generally believed that such neurochemicals belong exclusively to the animal kingdom and that any role such neurochemicals play in the infective process is largely confined to host physiology and immunology-related parameters. This, however, is wholly incorrect as many of the bacterial species that are known to cause infections possess the capacity to not only recognize neuroendocrine hormones produced by the host in response to stress, but also synthesize the very same neurochemicals. Given this, infectious microorganisms are capable of directly responding to the neurochemical outflow resulting from a stress event and initiating pathogenic processes. Although the neuroendocrine environment of the lung following a stress event is not fully understood, it most likely possesses abundant levels of stress-related neurochemicals due to its rich blood supply and rich noradrenergic tissue innervation. The ability of microorganisms to recognize and produce neurochemicals that can influence the host, known as microbial endocrinology, provides for a mechanistic basis with which to examine the ability of stress to influence health and susceptibility to disease.
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29
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The Dynamic Interactions between Salmonella and the Microbiota, within the Challenging Niche of the Gastrointestinal Tract. INTERNATIONAL SCHOLARLY RESEARCH NOTICES 2014; 2014:846049. [PMID: 27437481 PMCID: PMC4897363 DOI: 10.1155/2014/846049] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Accepted: 05/14/2014] [Indexed: 12/25/2022]
Abstract
Understanding how Salmonella species establish successful infections remains a foremost research priority. This gastrointestinal pathogen not only faces the hostile defenses of the host's immune system, but also faces fierce competition from the large and diverse community of microbiota for space and nutrients. Salmonella have solved these challenges ingeniously. To jump-start growth, Salmonella steal hydrogen produced by the gastrointestinal microbiota. Type 3 effector proteins are subsequently secreted by Salmonella to trigger potent inflammatory responses, which generate the alternative terminal electron acceptors tetrathionate and nitrate. Salmonella exclusively utilize these electron acceptors for anaerobic respiration, permitting metabolic access to abundant substrates such as ethanolamine to power growth blooms. Chemotaxis and flagella-mediated motility enable the identification of nutritionally beneficial niches. The resulting growth blooms also promote horizontal gene transfer amongst the resident microbes. Within the gastrointestinal tract there are opportunities for chemical signaling between host cells, the microbiota, and Salmonella. Host produced catecholamines and bacterial autoinducers form components of this chemical dialogue leading to dynamic interactions. Thus, Salmonella have developed remarkable strategies to initially shield against host defenses and to transiently compete against the intestinal microbiota leading to successful infections. However, the immunocompetent host is subsequently able to reestablish control and clear the infection.
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Intarak N, Muangsombut V, Vattanaviboon P, Stevens MP, Korbsrisate S. Growth, motility and resistance to oxidative stress of the melioidosis pathogenBurkholderia pseudomalleiare enhanced by epinephrine. Pathog Dis 2014; 72:24-31. [DOI: 10.1111/2049-632x.12181] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Revised: 03/28/2014] [Accepted: 04/10/2014] [Indexed: 01/07/2023] Open
Affiliation(s)
- Narin Intarak
- Department of Immunology; Faculty of Medicine Siriraj Hospital; Mahidol University; Bangkok Thailand
| | - Veerachat Muangsombut
- Department of Immunology; Faculty of Medicine Siriraj Hospital; Mahidol University; Bangkok Thailand
| | | | - Mark P. Stevens
- The Roslin Institute & Royal (Dick) School of Veterinary Studies; University of Edinburgh; Edinburgh UK
| | - Sunee Korbsrisate
- Department of Immunology; Faculty of Medicine Siriraj Hospital; Mahidol University; Bangkok Thailand
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31
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Zaitseva YV, Popova AA, Khmel IA. Quorum sensing regulation in bacteria of the family enterobacteriaceae. RUSS J GENET+ 2014. [DOI: 10.1134/s1022795414030120] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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32
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Multidirectional chemical signalling between Mammalian hosts, resident microbiota, and invasive pathogens: neuroendocrine hormone-induced changes in bacterial gene expression. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2014; 817:241-53. [PMID: 24997037 DOI: 10.1007/978-1-4939-0897-4_11] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Host-pathogen communication appears to be crucial in establishing the outcome of bacterial infections. There is increasing evidence to suggest that this communication can take place by bacterial pathogens sensing and subsequently responding to host neuroendocrine (NE) stress hormones. Bacterial pathogens have developed mechanisms allowing them to eavesdrop on these communication pathways within their hosts. These pathogens can use intercepted communication signals to adjust their fitness to persist and cause disease in their hosts. Recently, there have been numerous studies highlighting the ability of NE hormones to act as an environmental cue for pathogens, helping to steer their responses during host infection. Host NE hormone sensing can take place indirectly or directly via bacterial adrenergic receptors (BARs). The resulting changes in bacterial gene expression can be of strategic benefit to the pathogen. Furthermore, it is intriguing that not only can bacteria sense NE stress hormones but they are also able to produce key signalling molecules known as autoinducers. The rapid advances in our knowledge of the human microbiome, and its impact on health and disease highlights the potential importance of communication between the microbiota, pathogens and the host. It is indeed likely that the microbiota input significantly in the neuroendocrinological homeostasis of the host by catabolic, anabolic, and signalling processes. The arrival of unwanted guests, such as bacterial pathogens, clearly has a major impact on these delicately balanced interactions. Unravelling the pathways involved in interkingdom communication between invading bacterial pathogens, the resident microbiota, and hosts, may provide novel targets in our continuous search for new antimicrobials to control disease.
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Defoirdt T. Antivirulence therapy for animal production: filling an arsenal with novel weapons for sustainable disease control. PLoS Pathog 2013; 9:e1003603. [PMID: 24130477 PMCID: PMC3795005 DOI: 10.1371/journal.ppat.1003603] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Affiliation(s)
- Tom Defoirdt
- Laboratory of Aquaculture and Artemia Reference Center, Ghent University, Ghent, Belgium
- Laboratory of Microbial Ecology and Technology, Ghent University, Ghent, Belgium
- * E-mail:
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Trueba AF, Ritz T. Stress, asthma, and respiratory infections: pathways involving airway immunology and microbial endocrinology. Brain Behav Immun 2013; 29:11-27. [PMID: 23041248 DOI: 10.1016/j.bbi.2012.09.012] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2012] [Revised: 09/18/2012] [Accepted: 09/26/2012] [Indexed: 12/19/2022] Open
Abstract
Stress and infections have long been independently associated with asthma pathogenesis and exacerbation. Prior research has focused on the effect of psychological stress on Th cells with particular relevance to atopic asthma. In this review, we propose new perspectives that integrate the role of infection in the relationship between psychological stress and asthma. We highlight the essential role of the mucosal epithelia of the airways in understanding the interaction between infections and the stress-asthma relationship. In addition, we review findings suggesting that psychological stress not only modulates immune processes, but also the pathogenic qualities of bacteria, with implications for the pathogenesis and exacerbation asthma.
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Affiliation(s)
- Ana F Trueba
- Department of Psychology, Southern Methodist University, 6116 N. Central Expressway, Dallas, TX 75206, USA.
| | - Thomas Ritz
- Department of Psychology, Southern Methodist University, 6116 N. Central Expressway, Dallas, TX 75206, USA
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Freestone P. Communication between Bacteria and Their Hosts. SCIENTIFICA 2013; 2013:361073. [PMID: 24381789 PMCID: PMC3871906 DOI: 10.1155/2013/361073] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Accepted: 11/11/2013] [Indexed: 05/17/2023]
Abstract
It is clear that a dialogue is occurring between microbes and their hosts and that chemical signals are the language of this interkingdom communication. Microbial endocrinology shows that, through their long coexistence with animals and plants, microorganisms have evolved sensors for detecting eukaryotic hormones, which the microbe uses to determine that they are within proximity of a suitable host and to optimally time the expression of genes needed for host colonisation. It has also been shown that some prokaryotic chemical communication signals are recognized by eukaryotes. Deciphering what is being said during the cross-talk between microbe and host is therefore important, as it could lead to new strategies for preventing or treating bacterial infections.
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Affiliation(s)
- Primrose Freestone
- Department of Infection, Immunity and Inflammation, University of Leicester, Maurice Shock Medical Sciences Building, University Road, Leicester LE1 9HN, UK
- *Primrose Freestone:
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Karavolos MH, Winzer K, Williams P, Khan CMA. Pathogen espionage: multiple bacterial adrenergic sensors eavesdrop on host communication systems. Mol Microbiol 2012; 87:455-65. [PMID: 23231070 DOI: 10.1111/mmi.12110] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/19/2012] [Indexed: 12/11/2022]
Abstract
The interactions between bacterial pathogens and their eukaryotic hosts are vital in determining the outcome of infections. Bacterial pathogens employ molecular sensors to detect and facilitate adaptation to changes in their niche. The sensing of these extracellular signals enables the pathogen to navigate within mammalian hosts. Intercellular bacterial communication is facilitated by the production and sensing of autoinducer (AI) molecules via quorum sensing. More recently, AI-3 and the host neuroendocrine (NE) hormones adrenaline and noradrenaline were reported to display cross-talk for the activation of the same signalling pathways. Remarkably, there is increasing evidence to suggest that enteric bacteria sense and respond to the host NE stress hormones adrenaline and noradrenaline to modulate virulence. These responses can be inhibited by α and β-adrenergic receptor antagonists implying a bacterial receptor-based sensing and signalling cascade. In Escherichia coli O157:H7 and Salmonella, QseC has been proposed as the adrenergic receptor. Strikingly, there is an increasing body of evidence that not all the bacterial adrenergic responses require signalling through QseC. Here we provide additional hypotheses to reconcile these observations implicating the existence of alternative adrenergic receptors including BasS, QseE and CpxA and their associated signalling cascades with major roles in interkingdom communication.
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Affiliation(s)
- Michail H Karavolos
- Centre for Bacterial Cell Biology, Institute for Cell and Molecular Biosciences, The Medical School, Newcastle University, Newcastle NE2 4HH, UK
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Abstract
The feed efficiency of ruminant meat and dairy livestock can be significantly influenced by factors within their living environments. In particular, events perceived by the animals as stressful (such as parturition, transport or handling) have been found to affect susceptibility to infection. It has been well documented that even minor stress such as weighing can result in an increase in colonisation and faecal shedding of enteric pathogens such as Salmonella enterica and Escherichia coli O157:H7. Such infections affect both ruminant overall health and therefore performance, and are a particular problem for the meat production industries. Prior explanations for stress enhancing the likelihood of infection is that activation of the sympathetic nervous system under stress leads to the release of neuroendocrine mediators such as the catecholamine stress hormones noradrenaline and adrenaline, which may impair innate and adaptive immunity. More recently, however, another equally compelling explanation, viewed through the lens of the newly recognised microbiological discipline of microbial endocrinology is that the myriad of bacteria within the ruminant digestive tract are as responsive to the hormonal output of stress as the cells of their host. Work from our laboratories has shown that enteric pathogens have evolved systems for directly sensing stress hormones. We have demonstrated that even brief exposure of enteric pathogens to physiological concentrations of stress hormones can result in massive increases in growth and marked changes in expression of virulence factors such as adhesins and toxins. Happy, less stressed ruminants may therefore be better-nourished animals and safer sources of meat. This article reviews evidence that stress, as well as affecting nutrition, in ruminants is correlated with increased risk of enteric bacterial infections, and examines the molecular mechanisms that may be at work in both processes.
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Assessment of the in vitro inhibitory activity of specific probiotic bacteria against different Escherichia coli strains. J Clin Gastroenterol 2012; 46 Suppl:S29-32. [PMID: 22955353 DOI: 10.1097/mcg.0b013e31826852b7] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND Lactobacilli and bifidobacteria are often associated with health-promoting effects. These live microorganisms, defined as probiotics, are commonly consumed as part of fermented foods, such as yoghurt and fermented milks, or as dietary supplements. Escherichia coli is a gram-negative, rod-shaped bacterium commonly found in the lower intestine of warm-blooded organisms. As a part of the normal gut microbiota, this microorganism colonizes the gastrointestinal tract of animals and humans within a few hours after birth. All E. coli strains can produce a wide variety of biogenic amines responsible for potentially harmful systemic intoxications. Enterohemorrhagic E. coli serotype O157:H7 is a pathotype of diarrhoeagenic strains with a large virulence plasmid pO157 able to produce 1 or more Shiga toxins. METHODS The overall aim of this study was to determine the inhibitory effects of different strains of probiotics on E. coli serotypes, including E. coli O157:H7 (CQ9485). In particular, the antagonistic activity of 4 Bifidobacterium strains (Probiotical SpA, Italy) and 16 lactic acid bacteria, more specifically 14 Lactobacillus spp. and 2 Streptococcus spp., was assessed against selected E. coli biotypes (ATCC 8739, ATCC 10536, ATCC 35218, and ATCC 25922). The diarrhoeagenic serotype O157:H7 was also tested. RESULTS The experimental data collected demonstrated an in vitro significant inhibitory effect of 6 Lactobacillus strains, namely L. rhamnosus LR04, L. rhamnosus LR06, L. plantarum LP01, L. plantarum LP02, L. pentosus LPS01, and L. delbrueckii subsp. delbrueckii LDD01, and 2 Bifidobacterium strains, B. breve BR03 and B. breve B632. The inhibiting extent was slightly different among these strains, with L. delbrueckii subsp. delbrueckii LDD01 showing the highest activity on E. coli O157:H7. CONCLUSIONS Most of the probiotics studied are able to antagonize the growth of the 5 strains of E. coli tested, including the O157:H7 biotype, well known for their characteristic to produce a wide variety of biogenic amines considered responsible for dangerous systemic intoxications.
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Fernandez-Brando RJ, Miliwebsky E, Mejías MP, Baschkier A, Panek CA, Abrey-Recalde MJ, Cabrera G, Ramos MV, Rivas M, Palermo MS. Shiga toxin-producing Escherichia coli O157 : H7 shows an increased pathogenicity in mice after the passage through the gastrointestinal tract of the same host. J Med Microbiol 2012; 61:852-859. [DOI: 10.1099/jmm.0.041251-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Affiliation(s)
- Romina J. Fernandez-Brando
- División Inmunología, Instituto de Medicina Experimental (CONICET), Academia Nacional de Medicina, Buenos Aires, Argentina
| | - Elizabeth Miliwebsky
- Servicio Fisiopatogenia, Instituto Nacional de Enfermedades Infecciosas – ANLIS ‘Dr Carlos G. Malbrán’, Buenos Aires, Argentina
| | - María Pilar Mejías
- División Inmunología, Instituto de Medicina Experimental (CONICET), Academia Nacional de Medicina, Buenos Aires, Argentina
| | - Ariela Baschkier
- Servicio Fisiopatogenia, Instituto Nacional de Enfermedades Infecciosas – ANLIS ‘Dr Carlos G. Malbrán’, Buenos Aires, Argentina
| | - Cecilia A. Panek
- División Inmunología, Instituto de Medicina Experimental (CONICET), Academia Nacional de Medicina, Buenos Aires, Argentina
| | - María Jimena Abrey-Recalde
- División Inmunología, Instituto de Medicina Experimental (CONICET), Academia Nacional de Medicina, Buenos Aires, Argentina
| | - Gabriel Cabrera
- División Inmunología, Instituto de Medicina Experimental (CONICET), Academia Nacional de Medicina, Buenos Aires, Argentina
| | - María Victoria Ramos
- División Inmunología, Instituto de Medicina Experimental (CONICET), Academia Nacional de Medicina, Buenos Aires, Argentina
| | - Marta Rivas
- Servicio Fisiopatogenia, Instituto Nacional de Enfermedades Infecciosas – ANLIS ‘Dr Carlos G. Malbrán’, Buenos Aires, Argentina
| | - Marina S. Palermo
- División Inmunología, Instituto de Medicina Experimental (CONICET), Academia Nacional de Medicina, Buenos Aires, Argentina
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Significance of the adrenal and sympathetic response to burn injury. TOTAL BURN CARE 2012. [DOI: 10.1016/b978-1-4377-2786-9.00024-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
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Enterohemorrhagic Escherichia coli virulence regulation by two bacterial adrenergic kinases, QseC and QseE. Infect Immun 2011; 80:688-703. [PMID: 22144490 DOI: 10.1128/iai.05921-11] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The human pathogen enterohemorrhagic Escherichia coli (EHEC) O157:H7 has two histidine sensor kinases, QseC and QseE, which respond to the mammalian adrenergic hormones epinephrine and norepinephrine by increasing their autophosphorylation. Although QseC and QseE are present in nonpathogenic strains of E. coli, EHEC exploits these kinases for virulence regulation. To further investigate the full extent of epinephrine and its sensors' impact on EHEC virulence, we performed transcriptomic and phenotypic analyses of single and double deletions of qseC and qseE genes in the absence or presence of epinephrine. We showed that in EHEC, epinephrine sensing seems to occur primarily through QseC and QseE. We also observed that QseC and QseE regulate expression of the locus of enterocyte effacement (LEE) genes positively and negatively, respectively. LEE activation, which is required for the formation of the characteristic attaching and effacing (A/E) lesions by EHEC on epithelial cells, is epinephrine dependent. Regulation of the LEE and the non-LEE-contained virulence factor gene nleA by QseE is indirect, through transcription inhibition of the RcsB response regulator. Finally, we show that coincubation of HeLa cells with epinephrine increases EHEC infectivity in a QseC- and QseE-dependent manner. These results genetically and phenotypically map the contributions of the two adrenergic sensors QseC and QseE to EHEC pathogenesis.
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Abstract
AbstractMicrobial Endocrinology is a new microbiology research discipline that represents the intersection of microbiology and endocrinology with neurophysiology. It has as its main tenet that through their long co-existence with animals and plants, micro-organisms have evolved sensory systems for detecting host-associated hormones. These sensing systems allow the microbe to determine that they are within proximity of a suitable host, and that is time to initiate expression of genes involved in host colonisation. Microbial Endocrinology therefore provides a new paradigm with which to examine and understand the interactions of micro-organisms with their host under conditions present in both health and disease. This article will focus on microbial interactions with the fight and flight family of catecholamine stress hormones.
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The complex interplay between stress and bacterial infections in animals. Vet Microbiol 2011; 155:115-27. [PMID: 21963418 DOI: 10.1016/j.vetmic.2011.09.012] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2011] [Revised: 09/07/2011] [Accepted: 09/09/2011] [Indexed: 11/23/2022]
Abstract
Over the past decade, an increasing awareness has arisen of the role of neuroendocrine hormones in the susceptibility of mammalian hosts to a bacterial infection. During a stress response, glucocorticoids, catecholamines and neuroendocrine factors are released into the circulation of the host. For a long time the effects of stress on the course of an infection have been exclusively ascribed to the direct effect of stress-related hormones on the immune system and the intestinal barrier function. Chronic stress is known to cause a shift from T helper 1-mediated cellular immunity toward T helper 2-mediated humoral immunity, which can influence the course of an infection and/or the susceptibility to a microorganism. Bacteria can however also respond directly to stress-related host signals. Catecholamines can alter growth, motility, biofilm formation and/or virulence of pathogens and commensal bacteria, and as a consequence influence the outcome of infections by these bacteria in many hosts. For some bacteria, such as Salmonella, Escherichia coli and Pseudomonas aeruginosa it was shown that this influence is regulated by quorum sensing mechanisms. In this manuscript an overview of how and when stress influences the outcome of bacterial infections in animals is provided.
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Peterson G, Kumar A, Gart E, Narayanan S. Catecholamines increase conjugative gene transfer between enteric bacteria. Microb Pathog 2011; 51:1-8. [PMID: 21419838 DOI: 10.1016/j.micpath.2011.03.002] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2010] [Revised: 03/02/2011] [Accepted: 03/09/2011] [Indexed: 11/24/2022]
Abstract
The ability of pathogenic bacteria to sense and respond to periods of host stress is critical to their lifestyle. Adrenaline and norepinephrine are catecholamines that mediate acute host stress in vertebrates and invertebrates. Catecholamines are also used as environmental cues to enhance growth, motility and virulence of bacterial pathogens via specific binding receptors. Incidence of multidrug resistant and highly virulent bacterial pathogens is on the rise, and majority of the genes for antimicrobial resistance (AMR) and virulence are carried on horizontally transferable genetic elements. Conjugation machinery offers an efficient method for acquisition of AMR and virulence genes, which may be responsible for propelling the evolution of pathogenic bacteria. Here we show that norepinephrine (NE) at physiological concentrations enhances horizontal gene transfer (HGT) efficiencies of a conjugative plasmid from a clinical strain of Salmonella Typhimurium to an Escherichia coli recipient in vitro. Expressions of plasmid encoded transfer (tra) genes necessary for conjugation were also significantly upregulated in the presence of NE. Phentolamine, an α-adrenergic receptor antagonist, negated the effects of NE on conjugation more strongly than propranolol, a β-adrenergic receptor antagonist. This study for the first time provides evidence that innate mediators of acute host stress may influence evolution and adaptation of bacterial pathogens.
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Affiliation(s)
- Greg Peterson
- Department of Diagnostic Medicine and Pathobiology, College of Veterinary Medicine, Kansas State University, K-246 Mosier Hall, 1800 Denison Avenue, Manhattan, KS 66506, USA
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Lyte M, Vulchanova L, Brown DR. Stress at the intestinal surface: catecholamines and mucosa-bacteria interactions. Cell Tissue Res 2010; 343:23-32. [PMID: 20941511 DOI: 10.1007/s00441-010-1050-0] [Citation(s) in RCA: 178] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2010] [Accepted: 09/01/2010] [Indexed: 02/08/2023]
Abstract
Psychological stress has profound effects on gastrointestinal function, and investigations over the past few decades have examined the mechanisms by which neural and hormonal stress mediators act to modulate gut motility, epithelial barrier function and inflammatory states. With its cellular diversity and large commensal bacterial population, the intestinal mucosa and its overlying mucous environment constitute a highly interactive environment for eukaryotic host cells and prokaryotic bacteria. The elaboration of stress mediators, particularly norepinephrine, at this interface influences host cells engaged in mucosal protection and the bacteria which populate the mucosal surface and gut lumen. This review will address growing evidence that norepinephrine and, in some cases, other mediators of the adaptation to stress modulate mucosal interactions with enteric bacteria. Stress-mediated changes in this delicate interplay may shift the microbial colonization patterns on the mucosal surface and alter the susceptibility of the host to infection. Moreover, changes in host-microbe interactions in the digestive tract may also influence ongoing neural activity in stress-responsive brain areas.
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Affiliation(s)
- Mark Lyte
- Department of Pharmacy Practice, Texas Tech University Health Sciences Center, 3601 4th Street, MS 8162, Lubbock, TX 79430-8162, USA.
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Wade WF, O’Toole GA. Antibodies and immune effectors: shaping Gram-negative bacterial phenotypes. Trends Microbiol 2010; 18:234-9. [DOI: 10.1016/j.tim.2010.03.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2009] [Revised: 02/22/2010] [Accepted: 03/04/2010] [Indexed: 11/24/2022]
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Pullinger GD, Carnell SC, Sharaff FF, van Diemen PM, Dziva F, Morgan E, Lyte M, Freestone PPE, Stevens MP. Norepinephrine augments Salmonella enterica-induced enteritis in a manner associated with increased net replication but independent of the putative adrenergic sensor kinases QseC and QseE. Infect Immun 2010; 78:372-80. [PMID: 19884332 PMCID: PMC2798220 DOI: 10.1128/iai.01203-09] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2009] [Accepted: 10/24/2009] [Indexed: 11/20/2022] Open
Abstract
Stress has long been correlated with susceptibility to microbial infection. One explanation for this phenomenon is the ability of pathogens to sense and respond to host stress-related catecholamines, such as norepinephrine (NE). In Gram-negative enteric pathogens, it has been proposed that NE may facilitate growth by mediating iron supply, or it may alter gene expression by activating adrenergic sensor kinases. The aim of this work was to investigate the relative importance of these processes in a model in which NE alters the outcome of Salmonella enterica serovar Typhimurium infection. A bovine ligated ileal loop model was used to study the effect of NE on enteritis induced by S. Typhimurium and on the bacterial in vivo replication rate. Mutants lacking putative adrenergic receptor genes were assessed in the loop model, in a calf intestinal colonization model, and in vitro. S. Typhimurium-induced enteritis was significantly enhanced by addition of 5 mM NE. This effect was associated with increased net bacterial replication in the same model. Exogenous ferric iron also stimulated bacterial replication in the medium used but not transcription of enteritis-associated loci. The putative adrenergic sensors QseC and QseE were not required for NE-enhanced enteritis, intestinal colonization of calves, or NE-dependent growth in iron-restricted medium and did not influence expression or secretion of enteritis-associated virulence factors. Our findings support a role for stress-related catecholamines in modulating the virulence of enteric bacterial pathogens in vivo but suggest that bacterial adrenergic sensors may not be the vital link in such interkingdom signaling in Salmonella.
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Affiliation(s)
- Gillian D. Pullinger
- Division of Microbiology, Institute for Animal Health, Compton, United Kingdom, Department of Infection, Immunity and Inflammation, University of Leicester School of Medicine, Leicester, United Kingdom, School of Pharmacy, Texas Tech University Health Sciences Center, Lubbock, Texas
| | - Sonya C. Carnell
- Division of Microbiology, Institute for Animal Health, Compton, United Kingdom, Department of Infection, Immunity and Inflammation, University of Leicester School of Medicine, Leicester, United Kingdom, School of Pharmacy, Texas Tech University Health Sciences Center, Lubbock, Texas
| | - Fathima F. Sharaff
- Division of Microbiology, Institute for Animal Health, Compton, United Kingdom, Department of Infection, Immunity and Inflammation, University of Leicester School of Medicine, Leicester, United Kingdom, School of Pharmacy, Texas Tech University Health Sciences Center, Lubbock, Texas
| | - Pauline M. van Diemen
- Division of Microbiology, Institute for Animal Health, Compton, United Kingdom, Department of Infection, Immunity and Inflammation, University of Leicester School of Medicine, Leicester, United Kingdom, School of Pharmacy, Texas Tech University Health Sciences Center, Lubbock, Texas
| | - Francis Dziva
- Division of Microbiology, Institute for Animal Health, Compton, United Kingdom, Department of Infection, Immunity and Inflammation, University of Leicester School of Medicine, Leicester, United Kingdom, School of Pharmacy, Texas Tech University Health Sciences Center, Lubbock, Texas
| | - Eirwen Morgan
- Division of Microbiology, Institute for Animal Health, Compton, United Kingdom, Department of Infection, Immunity and Inflammation, University of Leicester School of Medicine, Leicester, United Kingdom, School of Pharmacy, Texas Tech University Health Sciences Center, Lubbock, Texas
| | - Mark Lyte
- Division of Microbiology, Institute for Animal Health, Compton, United Kingdom, Department of Infection, Immunity and Inflammation, University of Leicester School of Medicine, Leicester, United Kingdom, School of Pharmacy, Texas Tech University Health Sciences Center, Lubbock, Texas
| | - Primrose P. E. Freestone
- Division of Microbiology, Institute for Animal Health, Compton, United Kingdom, Department of Infection, Immunity and Inflammation, University of Leicester School of Medicine, Leicester, United Kingdom, School of Pharmacy, Texas Tech University Health Sciences Center, Lubbock, Texas
| | - Mark P. Stevens
- Division of Microbiology, Institute for Animal Health, Compton, United Kingdom, Department of Infection, Immunity and Inflammation, University of Leicester School of Medicine, Leicester, United Kingdom, School of Pharmacy, Texas Tech University Health Sciences Center, Lubbock, Texas
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QseC mediates Salmonella enterica serovar typhimurium virulence in vitro and in vivo. Infect Immun 2009; 78:914-26. [PMID: 20028809 DOI: 10.1128/iai.01038-09] [Citation(s) in RCA: 125] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
The autoinducer-3 (AI-3)/epinephrine (Epi)/norepinephrine (NE) interkingdom signaling system mediates chemical communication between bacteria and their mammalian hosts. The three signals are sensed by the QseC histidine kinase (HK) sensor. Salmonella enterica serovar Typhimurium is a pathogen that uses HKs to sense its environment and regulate virulence. Salmonella serovar Typhimurium invades epithelial cells and survives within macrophages. Invasion of epithelial cells is mediated by the type III secretion system (T3SS) encoded in Salmonella pathogenicity island 1 (SPI-1), while macrophage survival and systemic disease are mediated by the T3SS encoded in SPI-2. Here we show that QseC plays an important role in Salmonella serovar Typhimurium pathogenicity. A qseC mutant was impaired in flagellar motility, in invasion of epithelial cells, and in survival within macrophages and was attenuated for systemic infection in 129x1/SvJ mice. QseC acts globally, regulating expression of genes within SPI-1 and SPI-2 in vitro and in vivo (during infection of mice). Additionally, dopamine beta-hydroxylase knockout (Dbh(-)(/)(-)) mice that do not produce Epi or NE showed different susceptibility to Salmonella serovar Typhimurium infection than wild-type mice. These data suggest that the AI-3/Epi/NE signaling system is a key factor during Salmonella serovar Typhimurium pathogenesis in vitro and in vivo. Elucidation of the role of this interkingdom signaling system in Salmonella serovar Typhimurium should contribute to a better understanding of the complex interplay between the pathogen and the host during infection.
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Abstract
All farm animals will experience some level of stress during their lives. Stress reduces the fitness of an animal, which can be expressed through failure to achieve production performance standards, or through disease and death. Stress in farm animals can also have detrimental effects on the quality of food products. However, although a common assumption of a potential effect of stress on food safety exists, little is actually known about how this interaction may occur. The aim of this review was to examine the current knowledge of the potential impact of stress in farm animals on food safety risk. Colonization of farm animals by enteric pathogens such as Escherichia coli O157:H7, Salmonella, and Campylobacter, and their subsequent dissemination into the human food chain are a major public health and economic concern for the food industries. This review shows that there is increasing evidence to demonstrate that stress can have a significant deleterious effect on food safety through a variety of potential mechanisms. However, as the impact of stress is difficult to precisely determine, it is imperative that the issue receives more research attention in the interests of optimizing animal welfare and minimizing losses in product yield and quality, as well as to food safety risks to consumers. While there is some evidence linking stress with pathogen carriage and shedding in farm animals, the mechanisms underlying this effect have not been fully elucidated. Understanding when pathogen loads on the farm are the highest or when animals are most susceptible to infection will help identifying times when intervention strategies for pathogen control may be most effective, and consequently, increase the safety of food of animal origin.
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Affiliation(s)
- Marcos H Rostagno
- Livestock Behavior Research Unit, Agricultural Research Service, U.S. Department of Agriculture, West Lafayette, Indiana 47907, USA.
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The bacterial signal indole increases epithelial-cell tight-junction resistance and attenuates indicators of inflammation. Proc Natl Acad Sci U S A 2009; 107:228-33. [PMID: 19966295 DOI: 10.1073/pnas.0906112107] [Citation(s) in RCA: 582] [Impact Index Per Article: 38.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Interkingdom signaling is established in the gastrointestinal tract in that human hormones trigger responses in bacteria; here, we show that the corollary is true, that a specific bacterial signal, indole, is recognized as a beneficial signal in intestinal epithelial cells. Our prior work has shown that indole, secreted by commensal Escherichia coli and detected in human feces, reduces pathogenic E. coli chemotaxis, motility, and attachment to epithelial cells. However, the effect of indole on intestinal epithelial cells is not known. Because intestinal epithelial cells are likely to be exposed continuously to indole, we hypothesized that indole may be beneficial for these cells, and investigated changes in gene expression with the human enterocyte cell line HCT-8 upon exposure to indole. Exposure to physiologically relevant amounts of indole increased expression of genes involved in strengthening the mucosal barrier and mucin production, which were consistent with an increase in the transepithelial resistance of HCT-8 cells. Indole also decreased TNF-alpha-mediated activation of NF-kappaB, expression of the proinflammatory chemokine IL-8, and the attachment of pathogenic E. coli to HCT-8 cells, as well as increased expression of the antiinflammatory cytokine IL-10. The changes in transepithelial resistance and NF-kappaB activation were specific to indole: other indole-like molecules did not elicit a similar response. Our results are similar to those observed with probiotic strains and suggest that indole could be important in the intestinal epithelial cells response to gastrointestinal tract pathogens.
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