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  1. Artikel: The DmsABC S-oxide reductase is an essential component of a novel, hypochlorite-inducible system of extracellular stress defense in

    Nasreen, Marufa / Ellis, Daniel / Hosmer, Jennifer / Essilfie, Ama-Tawiah / Fantino, Emmanuelle / Sly, Peter / McEwan, Alastair G / Kappler, Ulrike

    Frontiers in microbiology

    2024  Band 15, Seite(n) 1359513

    Abstract: Defenses against oxidative damage to cell components are essential for survival of bacterial pathogens during infection, and here we have uncovered that the DmsABC S-/N-oxide reductase is essential for virulence and in-host survival of the human-adapted ... ...

    Abstract Defenses against oxidative damage to cell components are essential for survival of bacterial pathogens during infection, and here we have uncovered that the DmsABC S-/N-oxide reductase is essential for virulence and in-host survival of the human-adapted pathogen,
    Sprache Englisch
    Erscheinungsdatum 2024-04-04
    Erscheinungsland Switzerland
    Dokumenttyp Journal Article
    ZDB-ID 2587354-4
    ISSN 1664-302X
    ISSN 1664-302X
    DOI 10.3389/fmicb.2024.1359513
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  2. Artikel ; Online: CFTR is required for zinc-mediated antibacterial defense in human macrophages.

    Das Gupta, Kaustav / Curson, James E B / Tarique, Abdullah A / Kapetanovic, Ronan / Schembri, Mark A / Fantino, Emmanuelle / Sly, Peter D / Sweet, Matthew J

    Proceedings of the National Academy of Sciences of the United States of America

    2024  Band 121, Heft 8, Seite(n) e2315190121

    Abstract: Cystic fibrosis transmembrane conductance regulator (CFTR) is an anion transporter required for epithelial homeostasis in the lung and other organs, ... ...

    Abstract Cystic fibrosis transmembrane conductance regulator (CFTR) is an anion transporter required for epithelial homeostasis in the lung and other organs, with
    Mesh-Begriff(e) Humans ; Anti-Bacterial Agents/therapeutic use ; Cystic Fibrosis/microbiology ; Cystic Fibrosis Transmembrane Conductance Regulator/genetics ; Cystic Fibrosis Transmembrane Conductance Regulator/metabolism ; Escherichia coli/genetics ; Escherichia coli/metabolism ; Macrophages/metabolism ; Macrophages/microbiology ; Zinc/metabolism
    Chemische Substanzen Anti-Bacterial Agents ; CFTR protein, human ; Cystic Fibrosis Transmembrane Conductance Regulator (126880-72-6) ; Zinc (J41CSQ7QDS)
    Sprache Englisch
    Erscheinungsdatum 2024-02-16
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 209104-5
    ISSN 1091-6490 ; 0027-8424
    ISSN (online) 1091-6490
    ISSN 0027-8424
    DOI 10.1073/pnas.2315190121
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  3. Artikel ; Online: Resveratrol and Astaxanthin Protect Primary Human Nasal Epithelial Cells Cultured at an Air-liquid Interface from an Acute Oxidant Exposure.

    Yamamoto, Ayaho / Sly, Peter D / Begum, Nelufa / Yeo, Abrey J / Fantino, Emmanuelle

    Journal of cellular signaling

    2023  Band 3, Heft 4, Seite(n) 207–217

    Abstract: Oxidative stress (OS) in the airway epithelium is associated with cell damage, inflammation, and mitochondrial dysfunction that may initiate or worsen respiratory disease. However, it is unclear whether exogenous antioxidants can provide protection to ... ...

    Abstract Oxidative stress (OS) in the airway epithelium is associated with cell damage, inflammation, and mitochondrial dysfunction that may initiate or worsen respiratory disease. However, it is unclear whether exogenous antioxidants can provide protection to the airway epithelium from OS. Resveratrol and astaxanthin are nutritional compounds that have shown diverse benefits including protection against OS and inflammation in various situations. The aim of this study was to examine the utility of pre-treatment with resveratrol and astaxanthin to prevent the negative effects of oxidant exposure and restore redox homeostasis in a well-differentiated epithelium grown from primary human nasal epithelial cells (NECs) at the air-liquid interface. Fully differentiated NECs were pretreated with the antioxidants for 24 hours and the cultured epithelia was subsequently exposed to hydrogen peroxide (H
    Sprache Englisch
    Erscheinungsdatum 2023-01-26
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 3040876-3
    ISSN 2692-0638 ; 2692-0638
    ISSN (online) 2692-0638
    ISSN 2692-0638
    DOI 10.33696/signaling.3.084
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  4. Artikel ; Online: Redox Homeostasis in Well-differentiated Primary Human Nasal Epithelial Cells.

    Yamamoto, Ayaho / Sly, Peter D / Henningham, Anna / Begum, Nelufa / Yeo, Abrey J / Fantino, Emmanuelle

    Journal of cellular signaling

    2022  Band 3, Heft 4, Seite(n) 193–206

    Abstract: Oxidative stress (OS) in the airway epithelium is associated with inflammation, cell damage, and mitochondrial dysfunction that may initiate or worsen respiratory disease. Redox regulation maintains the equilibrium of pro-oxidant/antioxidant reactions ... ...

    Abstract Oxidative stress (OS) in the airway epithelium is associated with inflammation, cell damage, and mitochondrial dysfunction that may initiate or worsen respiratory disease. Redox regulation maintains the equilibrium of pro-oxidant/antioxidant reactions but can be disturbed by environmental exposures. The mechanism(s) underlying the induction and impact of OS on airway epithelium and how these influences on respiratory disease is poorly understood. The aim of this study was to develop a stress response model in primary human nasal epithelial cells (NECs) grown at the air-liquid interface (ALI) into a well-differentiated epithelium and to use this model to investigate the mechanisms underlying OS. Hydrogen peroxide (H
    Sprache Englisch
    Erscheinungsdatum 2022-12-30
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 3040876-3
    ISSN 2692-0638 ; 2692-0638
    ISSN (online) 2692-0638
    ISSN 2692-0638
    DOI 10.33696/signaling.3.083
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  5. Artikel ; Online: COPD Is Associated with Elevated IFN-β Production by Bronchial Epithelial Cells Infected with RSV or hMPV.

    Collinson, Natasha / Snape, Natale / Beagley, Kenneth / Fantino, Emmanuelle / Spann, Kirsten

    Viruses

    2021  Band 13, Heft 5

    Abstract: IFN treatment may be a viable option for treating COPD exacerbations based on evidence of IFN deficiency in COPD. However, in vitro studies have used primarily influenza and rhinoviruses to investigate IFN responses. This study aims to investigate the ... ...

    Abstract IFN treatment may be a viable option for treating COPD exacerbations based on evidence of IFN deficiency in COPD. However, in vitro studies have used primarily influenza and rhinoviruses to investigate IFN responses. This study aims to investigate the susceptibility to infection and IFN response of primary bronchial epithelial cells (BECs) from COPD donors to infection with RSV and hMPV. BECs from five COPD and five healthy donors were used to establish both submerged monolayer and well-differentiated (WD) cultures. Two isolates of both RSV and hMPV were used to infect cells. COPD was not associated with elevated susceptibility to infection and there was no evidence of an intrinsic defect in IFN production in either cell model to either virus. Conversely, COPD was associated with significantly elevated IFN-β production in response to both viruses in both cell models. Only in WD-BECs infected with RSV was elevated IFN-β associated with reduced viral shedding. The role of elevated epithelial cell IFN-β production in the pathogenesis of COPD is not clear and warrants further investigation. Viruses vary in the responses that they induce in BECs, and so conclusions regarding antiviral responses associated with disease cannot be made based on single viral infections.
    Mesh-Begriff(e) Aged ; Cells, Cultured ; Disease Susceptibility ; Epithelial Cells/virology ; Female ; Humans ; Interferon-beta/biosynthesis ; Male ; Metapneumovirus ; Middle Aged ; Paramyxoviridae Infections/complications ; Paramyxoviridae Infections/virology ; Pulmonary Disease, Chronic Obstructive/etiology ; Pulmonary Disease, Chronic Obstructive/metabolism ; Pulmonary Disease, Chronic Obstructive/pathology ; Respiratory Mucosa/metabolism ; Respiratory Mucosa/pathology ; Respiratory Mucosa/virology ; Respiratory Syncytial Virus Infections/complications ; Respiratory Syncytial Virus Infections/virology ; Respiratory Syncytial Viruses ; Virus Shedding
    Chemische Substanzen Interferon-beta (77238-31-4)
    Sprache Englisch
    Erscheinungsdatum 2021-05-14
    Erscheinungsland Switzerland
    Dokumenttyp Journal Article
    ZDB-ID 2516098-9
    ISSN 1999-4915 ; 1999-4915
    ISSN (online) 1999-4915
    ISSN 1999-4915
    DOI 10.3390/v13050911
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  6. Artikel ; Online: Azithromycin Augments Bacterial Uptake and Anti-Inflammatory Macrophage Polarization in Cystic Fibrosis.

    Tarique, Abdullah A / Tuladhar, Neeraj / Kelk, Dean / Begum, Nelufa / Lucas, Richard M / Luo, Lin / Stow, Jennifer L / Wainwright, Claire E / Bell, Scott C / Sly, Peter D / Fantino, Emmanuelle

    Cells

    2024  Band 13, Heft 2

    Abstract: Background: Azithromycin (AZM) is widely being used for treating patients with cystic fibrosis (pwCF) following clinical trials demonstrating improved lung function and fewer incidents of pulmonary exacerba-tions. While the precise mechanisms remain ... ...

    Abstract Background: Azithromycin (AZM) is widely being used for treating patients with cystic fibrosis (pwCF) following clinical trials demonstrating improved lung function and fewer incidents of pulmonary exacerba-tions. While the precise mechanisms remain elusive, immunomodulatory actions are thought to be involved. We previously reported impaired phagocytosis and defective anti-inflammatory M2 macrophage polarization in CF. This study systematically analyzed the effect of AZM on the functions of unpolarized and M1/M2 polarized macrophages in CF.
    Methods: Monocytes, isolated from the venous blood of patients with CF (pwCF) and healthy controls (HCs), were differentiated into monocyte-derived macrophages (MDMs) and subsequently infected with
    Results: Following AZM treatment, both HC and CF MDMs exhibited a significant increase in
    Conclusions: This study highlights the cellular functions and molecular targets of AZM which may involve an improved uptake of both Gram-positive and Gram-negative bacteria, restored anti-inflammatory macrophage polarization in CF. This may in turn shape the reduced lung inflammation observed in clinical trials. In addition, we confirmed the role of ERK1/2 activation for bacterial uptake.
    Mesh-Begriff(e) Humans ; Azithromycin/pharmacology ; Gram-Negative Bacteria ; Anti-Bacterial Agents/pharmacology ; Cystic Fibrosis/drug therapy ; Escherichia coli ; Staphylococcus aureus ; Gram-Positive Bacteria ; Macrophages ; Anti-Inflammatory Agents/pharmacology
    Chemische Substanzen Azithromycin (83905-01-5) ; Anti-Bacterial Agents ; Anti-Inflammatory Agents
    Sprache Englisch
    Erscheinungsdatum 2024-01-16
    Erscheinungsland Switzerland
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2661518-6
    ISSN 2073-4409 ; 2073-4409
    ISSN (online) 2073-4409
    ISSN 2073-4409
    DOI 10.3390/cells13020166
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  7. Artikel ; Online: Neutrophil respiratory burst activity is not exaggerated in cystic fibrosis.

    Kelk, Dean / Logan, Jayden / Andersen, Isabella / Gutierrez Cardenas, Diana / Bell, Scott C / Wainwright, Claire E / Sly, Peter D / Fantino, Emmanuelle

    Journal of cystic fibrosis : official journal of the European Cystic Fibrosis Society

    2022  Band 21, Heft 4, Seite(n) 707–712

    Abstract: Background: Exaggerated neutrophil-dominated inflammation underlies progressive cystic fibrosis (CF) lung disease. Older studies reported a defective respiratory burst in CF, but more recent studies suggest neutrophil function is normal.: Methods: We ...

    Abstract Background: Exaggerated neutrophil-dominated inflammation underlies progressive cystic fibrosis (CF) lung disease. Older studies reported a defective respiratory burst in CF, but more recent studies suggest neutrophil function is normal.
    Methods: We measured the amount and rate of reactive oxygen species (ROS) during PMA-stimulated respiratory burst activity in children [70 CF, 13 disease controls, 19 health controls] and adults [31 CF, 14 health controls] in neutrophils harvested from peripheral blood. Blood was collected from participants with CF when clinically stable (60 children, 9 adults) and on hospital admission (38 children, 24 adults) and discharge (18 children, 21 adults) for acute pulmonary exacerbations.
    Results: When clinically stable, children with CF had lower ROS production [median 318,633, 25% 136,810 - 75% 569,523 RLU] than disease controls [median 599,459, 25% 425,566 - 75% 730,527 RLU] and healthy controls [median 534,073, 25% 334,057 - 75% 738,593 RLU] (p = 0.008). The rate of ROS production was also lower (p = 0.029). In neither children nor adults with CF did ROS production increase on hospital admission for acute pulmonary exacerbation, nor fall prior to discharge. There were no associations between ROS production and high-sensitivity C-reactive protein (indicating systemic inflammation) in either children or adults with CF.
    Conclusions: Our data do not support a role for exaggerated respiratory burst activity contributing to the exaggerated neutrophil-dominated inflammation seen with CF lung disease.
    Mesh-Begriff(e) Adult ; Child ; Cystic Fibrosis ; Humans ; Inflammation/metabolism ; Neutrophils/metabolism ; Reactive Oxygen Species/metabolism ; Respiratory Burst
    Chemische Substanzen Reactive Oxygen Species
    Sprache Englisch
    Erscheinungsdatum 2022-01-03
    Erscheinungsland Netherlands
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2084724-5
    ISSN 1873-5010 ; 1569-1993
    ISSN (online) 1873-5010
    ISSN 1569-1993
    DOI 10.1016/j.jcf.2021.12.015
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  8. Artikel ; Online: Characterizing well-differentiated culture of primary human nasal epithelial cells for use in wound healing assays.

    Schagen, Johanna / Sly, Peter D / Fantino, Emmanuelle

    Laboratory investigation; a journal of technical methods and pathology

    2018  Band 98, Heft 11, Seite(n) 1478–1486

    Abstract: The nasal epithelium is the initial contact between the external environment and the respiratory tract and how it responds to noxious stimuli and repairs epithelial damage is important. Growing airway epithelial cells in culture at air-liquid interface ... ...

    Abstract The nasal epithelium is the initial contact between the external environment and the respiratory tract and how it responds to noxious stimuli and repairs epithelial damage is important. Growing airway epithelial cells in culture at air-liquid interface allows for a physiologically relevant model of the human upper airways. The aim of the present study was to characterize human primary nasal epithelial cells grown at the air-liquid interface and establish a model for use in wound healing assays. This study determined the time required for full differentiation of nasal epithelial cells in an air-liquid interface culture to be at least 7 weeks using the standardized B-ALI media. Also, a model was established that studied the response to wounding and the effect of EGFR inhibition on this process. Nasal epithelial cultures from healthy subjects were differentiated at air-liquid interface and manually wounded. Wounds were monitored over time to complete closure using a time lapse imaging microscope with cultures identified to have a rate of wound healing above 2.5%/h independent of initial wound size. EGFR inhibition caused the rate of wound healing to drop a significant 4.6%/h with there being no closure of the wound after 48 h. The robust model established in this study will be essential for studying factors influencing wound healing, including host disease status and environmental exposures in the future.
    Mesh-Begriff(e) Cell Differentiation ; Cytokines/metabolism ; ErbB Receptors/antagonists & inhibitors ; Erlotinib Hydrochloride ; Female ; Humans ; Male ; Nasal Mucosa/cytology ; Primary Cell Culture ; Wound Healing
    Chemische Substanzen Cytokines ; Erlotinib Hydrochloride (DA87705X9K) ; EGFR protein, human (EC 2.7.10.1) ; ErbB Receptors (EC 2.7.10.1)
    Sprache Englisch
    Erscheinungsdatum 2018-08-08
    Erscheinungsland United States
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 80178-1
    ISSN 1530-0307 ; 0023-6837
    ISSN (online) 1530-0307
    ISSN 0023-6837
    DOI 10.1038/s41374-018-0100-1
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  9. Artikel ; Online: Environmentally persistent free radicals enhance SARS-CoV-2 replication in respiratory epithelium.

    Yamamoto, Ayaho / Sly, Peter D / Chew, Keng Yih / Khachatryan, Lavrent / Begum, Nelufa / Yeo, Abrey J / Vu, Luan D / Short, Kirsty R / Cormier, Stephania A / Fantino, Emmanuelle

    Experimental biology and medicine (Maywood, N.J.)

    2023  Band 248, Heft 3, Seite(n) 271–279

    Abstract: Epidemiological evidence links lower air quality with increased incidence and severity of COVID-19; however, mechanistic data have yet to be published. We hypothesized air pollution-induced oxidative stress in the nasal epithelium increased viral ... ...

    Abstract Epidemiological evidence links lower air quality with increased incidence and severity of COVID-19; however, mechanistic data have yet to be published. We hypothesized air pollution-induced oxidative stress in the nasal epithelium increased viral replication and inflammation. Nasal epithelial cells (NECs), collected from healthy adults, were grown into a fully differentiated epithelium. NECs were infected with the ancestral strain of SARS-CoV-2. An oxidant combustion by-product found in air pollution, the environmentally persistent free radical (EPFR) DCB230, was used to mimic pollution exposure four hours prior to infection. Some wells were pretreated with antioxidant, astaxanthin, for 24 hours prior to EPFR-DCB230 exposure and/or SARS-CoV-2 infection. Outcomes included viral replication, epithelial integrity, surface receptor expression (
    Mesh-Begriff(e) Humans ; SARS-CoV-2/metabolism ; COVID-19/metabolism ; Antioxidants/metabolism ; Tumor Necrosis Factor-alpha/metabolism ; Angiotensin-Converting Enzyme 2/metabolism ; Free Radicals/metabolism ; Cytokines/metabolism ; Respiratory Mucosa/metabolism ; Oxidants/metabolism
    Chemische Substanzen Antioxidants ; Tumor Necrosis Factor-alpha ; Angiotensin-Converting Enzyme 2 (EC 3.4.17.23) ; astaxanthine (8XPW32PR7I) ; Free Radicals ; Cytokines ; Oxidants
    Sprache Englisch
    Erscheinungsdatum 2023-01-11
    Erscheinungsland England
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, N.I.H., Extramural
    ZDB-ID 4015-0
    ISSN 1535-3699 ; 1525-1373 ; 0037-9727
    ISSN (online) 1535-3699 ; 1525-1373
    ISSN 0037-9727
    DOI 10.1177/15353702221142616
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  10. Artikel: COPD Is Associated with Elevated IFN-β Production by Bronchial Epithelial Cells Infected with RSV or hMPV

    Collinson, Natasha / Snape, Natale / Beagley, Kenneth / Fantino, Emmanuelle / Spann, Kirsten

    Viruses. 2021 May 14, v. 13, no. 5

    2021  

    Abstract: IFN treatment may be a viable option for treating COPD exacerbations based on evidence of IFN deficiency in COPD. However, in vitro studies have used primarily influenza and rhinoviruses to investigate IFN responses. This study aims to investigate the ... ...

    Abstract IFN treatment may be a viable option for treating COPD exacerbations based on evidence of IFN deficiency in COPD. However, in vitro studies have used primarily influenza and rhinoviruses to investigate IFN responses. This study aims to investigate the susceptibility to infection and IFN response of primary bronchial epithelial cells (BECs) from COPD donors to infection with RSV and hMPV. BECs from five COPD and five healthy donors were used to establish both submerged monolayer and well-differentiated (WD) cultures. Two isolates of both RSV and hMPV were used to infect cells. COPD was not associated with elevated susceptibility to infection and there was no evidence of an intrinsic defect in IFN production in either cell model to either virus. Conversely, COPD was associated with significantly elevated IFN-β production in response to both viruses in both cell models. Only in WD-BECs infected with RSV was elevated IFN-β associated with reduced viral shedding. The role of elevated epithelial cell IFN-β production in the pathogenesis of COPD is not clear and warrants further investigation. Viruses vary in the responses that they induce in BECs, and so conclusions regarding antiviral responses associated with disease cannot be made based on single viral infections.
    Schlagwörter Enterovirus ; epithelial cells ; epithelium ; influenza ; models ; pathogenesis ; viruses
    Sprache Englisch
    Erscheinungsverlauf 2021-0514
    Erscheinungsort Multidisciplinary Digital Publishing Institute
    Dokumenttyp Artikel
    Anmerkung NAL-AP-2-clean
    ZDB-ID 2516098-9
    ISSN 1999-4915
    ISSN 1999-4915
    DOI 10.3390/v13050911
    Datenquelle NAL Katalog (AGRICOLA)

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