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  1. Article: DHEA treatment of pulmonary hypertension: new insights into a complex mechanism.

    Dubuis, Eric

    Cardiovascular research

    2007  Volume 74, Issue 3, Page(s) 337–338

    MeSH term(s) Animals ; Dehydroepiandrosterone/metabolism ; Dehydroepiandrosterone/therapeutic use ; Dehydroepiandrosterone Sulfate/metabolism ; Guanylate Cyclase/metabolism ; Humans ; Hypertension, Pulmonary/blood ; Hypertension, Pulmonary/drug therapy ; Hypertension, Pulmonary/metabolism ; Models, Animal ; Muscle, Smooth, Vascular/metabolism ; Nitric Oxide/metabolism ; Pulmonary Artery/metabolism ; Pulmonary Artery/physiopathology ; Rats ; Testosterone/blood
    Chemical Substances Nitric Oxide (31C4KY9ESH) ; Testosterone (3XMK78S47O) ; Dehydroepiandrosterone (459AG36T1B) ; Dehydroepiandrosterone Sulfate (57B09Q7FJR) ; Guanylate Cyclase (EC 4.6.1.2)
    Language English
    Publishing date 2007-06-01
    Publishing country England
    Document type Comment ; Editorial
    ZDB-ID 80340-6
    ISSN 1755-3245 ; 0008-6363
    ISSN (online) 1755-3245
    ISSN 0008-6363
    DOI 10.1016/j.cardiores.2007.04.002
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Novel airway smooth muscle-mast cell interactions and a role for the TRPV4-ATP axis in non-atopic asthma.

    Bonvini, Sara J / Birrell, Mark A / Dubuis, Eric / Adcock, John J / Wortley, Michael A / Flajolet, Pauline / Bradding, Peter / Belvisi, Maria G

    The European respiratory journal

    2020  Volume 56, Issue 1

    Abstract: Mast cell-airway smooth muscle (ASM) interactions play a major role in the immunoglobulin (Ig)E- dependent bronchoconstriction seen in asthma but less is known about IgE-independent mechanisms of mast cell activation. Transient receptor potential cation ... ...

    Abstract Mast cell-airway smooth muscle (ASM) interactions play a major role in the immunoglobulin (Ig)E- dependent bronchoconstriction seen in asthma but less is known about IgE-independent mechanisms of mast cell activation. Transient receptor potential cation channel, subfamily V, member 4 (TRPV4) activation causes contraction of human ASM
    MeSH term(s) Adenosine Triphosphate ; Animals ; Asthma ; Cell Communication ; Guinea Pigs ; Muscle Contraction ; Muscle, Smooth ; TRPV Cation Channels
    Chemical Substances TRPV Cation Channels ; Adenosine Triphosphate (8L70Q75FXE)
    Language English
    Publishing date 2020-07-02
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 639359-7
    ISSN 1399-3003 ; 0903-1936
    ISSN (online) 1399-3003
    ISSN 0903-1936
    DOI 10.1183/13993003.01458-2019
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Prevalence of SARS-CoV-2 in Household Members and Other Close Contacts of COVID-19 Cases: A Serologic Study in Canton of Vaud, Switzerland.

    Dupraz, Julien / Butty, Audrey / Duperrex, Olivier / Estoppey, Sandrine / Faivre, Vincent / Thabard, Julien / Zuppinger, Claire / Greub, Gilbert / Pantaleo, Giuseppe / Pasquier, Jérôme / Rousson, Valentin / Egger, Malik / Steiner-Dubuis, Amélie / Vassaux, Sophie / Masserey, Eric / Bochud, Murielle / Gonseth Nusslé, Semira / D'Acremont, Valérie

    Open forum infectious diseases

    2021  Volume 8, Issue 7, Page(s) ofab149

    Abstract: Background: Research on severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) transmission within households and other close settings using serological testing is scarce.: Methods: We invited coronavirus disease 2019 (COVID-19) cases diagnosed ...

    Abstract Background: Research on severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) transmission within households and other close settings using serological testing is scarce.
    Methods: We invited coronavirus disease 2019 (COVID-19) cases diagnosed between February 27 and April 1, 2020, in Canton of Vaud, Switzerland, to participate, along with household members and other close contacts. Anti-SARS-CoV-2 immunoglobulin G antibodies were measured using a Luminex immunoassay. We estimated factors associated with serological status using generalized estimating equations.
    Results: Overall, 219 cases, 302 household members, and 69 other close contacts participated between May 4 and June 27, 2020. More than half of household members (57.2%; 95% CI, 49.7%-64.3%) had developed a serologic response to SARS-CoV-2, while 19.0% (95% CI, 10.0%-33.2%) of other close contacts were seropositive. After adjusting for individual and household characteristics, infection risk was higher in household members aged ≥65 years than in younger adults (adjusted odds ratio [aOR], 3.63; 95% CI, 1.05-12.60) and in those not strictly adhering to simple hygiene rules like hand washing (aOR, 1.80; 95% CI, 1.02-3.17). The risk was lower when more than 5 people outside home were met during semiconfinement, compared with none (aOR, 0.35; 95% CI, 0.16-0.74). Individual risk of household members to be seropositive was lower in large households (22% less per each additional person).
    Conclusions: During semiconfinement, household members of a COVID-19 case were at very high risk of getting infected, 3 times more than close contacts outside home. This highlights the need to provide clear messages on protective measures applicable at home. For elderly couples, who were especially at risk, providing external support for daily basic activities is essential.
    Language English
    Publishing date 2021-03-26
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2757767-3
    ISSN 2328-8957
    ISSN 2328-8957
    DOI 10.1093/ofid/ofab149
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: G-protein coupled receptors regulating cough.

    Maher, Sarah A / Dubuis, Eric D / Belvisi, Maria G

    Current opinion in pharmacology

    2011  Volume 11, Issue 3, Page(s) 248–253

    Abstract: Cough is a protective mechanism but can occur excessively in disease. Cough can be modulated by a range of GPCRs which can be either inhibitory or excitatory. Prostaglandin E2 and bradykinin can activate airway sensory nerves via EP3 and B2 receptors ... ...

    Abstract Cough is a protective mechanism but can occur excessively in disease. Cough can be modulated by a range of GPCRs which can be either inhibitory or excitatory. Prostaglandin E2 and bradykinin can activate airway sensory nerves via EP3 and B2 receptors receptively and have both been shown to mediate their effects though TRPV1 and TRPA1 receptors. Activation of the β2-adrenoceptor and cannabinoid CB2 receptors can inhibit sensory nerves and prevent cough. It is currently thought that activation of the β2-adrenoceptor causes c-AMP dependent activation of PKA; however, recent research has suggested that the pathway involves PKG-mediated opening of the BKCa channel leading to hyperpolarization.
    MeSH term(s) Animals ; Cough/metabolism ; Humans ; Receptors, G-Protein-Coupled/metabolism ; Sensory Receptor Cells/metabolism ; Signal Transduction
    Chemical Substances Receptors, G-Protein-Coupled
    Language English
    Publishing date 2011-07-02
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 2037057-X
    ISSN 1471-4973 ; 1471-4892
    ISSN (online) 1471-4973
    ISSN 1471-4892
    DOI 10.1016/j.coph.2011.06.005
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Transient receptor potential A1 channels: insights into cough and airway inflammatory disease.

    Belvisi, Maria G / Dubuis, Eric / Birrell, Mark A

    Chest

    2011  Volume 140, Issue 4, Page(s) 1040–1047

    Abstract: Cough is a common symptom of diseases such as asthma and COPD and also presents as a disease in its own right. Treatment options are limited; a recent meta-analysis concluded that over-the-counter remedies are ineffective, and there is increasing concern ...

    Abstract Cough is a common symptom of diseases such as asthma and COPD and also presents as a disease in its own right. Treatment options are limited; a recent meta-analysis concluded that over-the-counter remedies are ineffective, and there is increasing concern about their use in children. Transient receptor potential cation channel, subfamily A, member 1 (TRPA1) channels are nonselective cation channels that are activated by a range of natural products (eg, allyl isothiocyanate), a multitude of environmental irritants (eg, acrolein, which is present in air pollution, vehicle exhaust, and cigarette smoke), and inflammatory mediators (eg, cyclopentenone prostaglandins). TRPA1 is primarily expressed in small-diameter, nociceptive neurons where its activation probably contributes to the perception of noxious stimuli. Inhalational exposure to irritating gases, fumes, dusts, vapors, chemicals, and endogenous mediators can lead to the development of cough. The respiratory tract is innervated by primary sensory afferent nerves, which are activated by mechanical and chemical stimuli. Recent data suggest that activation of TRPA1 on these vagal sensory afferents by these irritant substances could lead to central reflexes, including dyspnea, changes in breathing pattern, and cough, which contribute to the symptoms and pathophysiology of respiratory diseases.
    MeSH term(s) Bronchitis/drug therapy ; Bronchitis/etiology ; Bronchitis/physiopathology ; Calcium Channels/physiology ; Cough/drug therapy ; Cough/etiology ; Cough/physiopathology ; Humans ; Inhalation Exposure/adverse effects ; Irritants/adverse effects ; Nerve Tissue Proteins/physiology ; Respiratory System/innervation ; Sensory Receptor Cells/physiology ; TRPA1 Cation Channel ; Transient Receptor Potential Channels/physiology
    Chemical Substances Calcium Channels ; Irritants ; Nerve Tissue Proteins ; TRPA1 Cation Channel ; TRPA1 protein, human ; Transient Receptor Potential Channels
    Language English
    Publishing date 2011-10-04
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1032552-9
    ISSN 1931-3543 ; 0012-3692
    ISSN (online) 1931-3543
    ISSN 0012-3692
    DOI 10.1378/chest.10-3327
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Pre-clinical studies in cough research: role of Transient Receptor Potential (TRP) channels.

    Grace, Megan S / Dubuis, Eric / Birrell, Mark A / Belvisi, Maria G

    Pulmonary pharmacology & therapeutics

    2013  Volume 26, Issue 5, Page(s) 498–507

    Abstract: Cough is a protective reflex and defence mechanism in healthy individuals, which helps clear excessive secretions and foreign material from the lungs. Cough often presents as the first and most persistent symptom of many respiratory diseases and some non- ...

    Abstract Cough is a protective reflex and defence mechanism in healthy individuals, which helps clear excessive secretions and foreign material from the lungs. Cough often presents as the first and most persistent symptom of many respiratory diseases and some non-respiratory disorders, but can also be idiopathic, and is a common respiratory complaint for which medical attention is sought. Chronic cough of various aetiologies is a regular presentation to specialist respiratory clinics, and is reported as a troublesome symptom by a significant proportion of the population. Despite this, the treatment options for cough are limited. The lack of effective anti-tussives likely stems from our incomplete understanding of how the tussive reflex is mediated. However, research over the last decade has begun to shed some light on the mechanisms which provoke cough, and may ultimately provide us with better anti-tussive therapies. This review will focus on the in vitro and in vivo models that are currently used to further our understanding of the sensory innervation of the respiratory tract, and how these nerves are involved in controlling the cough response. Central to this are the Transient Receptor Potential (TRP) ion channels, a family of polymodal receptors that can be activated by such diverse stimuli as chemicals, temperature, osmotic stress, and mechanical perturbation. These ion channels are thought to be molecular pain integrators and targets for novel analgesic agents for the treatment of various pain disorders but some are also being developed as anti-tussives.
    MeSH term(s) Animals ; Antitussive Agents/pharmacology ; Cough/drug therapy ; Cough/physiopathology ; Drug Design ; Drug Evaluation, Preclinical/methods ; Humans ; Models, Biological ; Respiratory System/metabolism ; Respiratory System/physiopathology ; Respiratory Tract Diseases/physiopathology ; Transient Receptor Potential Channels/metabolism
    Chemical Substances Antitussive Agents ; Transient Receptor Potential Channels
    Language English
    Publishing date 2013-03-06
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 1399707-5
    ISSN 1522-9629 ; 1094-5539
    ISSN (online) 1522-9629
    ISSN 1094-5539
    DOI 10.1016/j.pupt.2013.02.007
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: TRP channel antagonists as potential antitussives.

    Grace, Megan S / Dubuis, Eric / Birrell, Mark A / Belvisi, Maria G

    Lung

    2011  Volume 190, Issue 1, Page(s) 11–15

    Abstract: Cough is a troublesome symptom associated with many respiratory diseases. In some instances cough can become prolonged and excessive, and chronic cough of various aetiologies is a common presentation to specialist respiratory clinics. However, current ... ...

    Abstract Cough is a troublesome symptom associated with many respiratory diseases. In some instances cough can become prolonged and excessive, and chronic cough of various aetiologies is a common presentation to specialist respiratory clinics. However, current treatment options are limited. Despite its importance, our understanding of the mechanisms that provoke cough is poor. Recent investigation has focused on the interaction between G-protein-coupled receptors and ion channels expressed on airway sensory nerves that are responsible for driving the cough reflex. In particular, the Transient Receptor Potential class of ion channels appears to play a major role as a regulator of the afferent arm of the cough reflex and could be involved in the heightened cough response observed in disease states. Current research investigating the pathogenesis of cough supports the development of TRP channel inhibitors as novel and selective treatment modalities.
    MeSH term(s) Antitussive Agents/therapeutic use ; Cough/drug therapy ; Cough/etiology ; Cough/physiopathology ; Humans ; Neurons, Afferent/physiology ; Respiratory System/innervation ; Transient Receptor Potential Channels/antagonists & inhibitors ; Transient Receptor Potential Channels/physiology
    Chemical Substances Antitussive Agents ; Transient Receptor Potential Channels
    Language English
    Publishing date 2011-10-02
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 6165-7
    ISSN 1432-1750 ; 0341-2040
    ISSN (online) 1432-1750
    ISSN 0341-2040
    DOI 10.1007/s00408-011-9322-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: CD4⁺ and CD8⁺ T cells play a central role in a HDM driven model of allergic asthma.

    Raemdonck, Kristof / Baker, Katie / Dale, Nicole / Dubuis, Eric / Shala, Fisnik / Belvisi, Maria G / Birrell, Mark A

    Respiratory research

    2016  Volume 17, Page(s) 45

    Abstract: Background: The incidence of asthma is increasing at an alarming rate and while the current available therapies are effective in the majority of patients they fail to adequately control symptoms at the more severe end of the disease spectrum. In the ... ...

    Abstract Background: The incidence of asthma is increasing at an alarming rate and while the current available therapies are effective in the majority of patients they fail to adequately control symptoms at the more severe end of the disease spectrum. In the search to understand disease pathogenesis and find effective therapies animal models are often employed. As exposure to house dust mite (HDM) has a causative link, it is thought of as the allergen of choice for modelling asthma. The objective was to develop a HDM driven model of asthmatic sensitisation and characterise the role of key allergic effector cells/mediators.
    Methods: Mice were sensitised with low doses of HDM and then subsequently challenged. Cellular inflammation, IgE and airway responsiveness (AHR) was assessed in wild type mice or CD4(+)/CD8(+) T cells, B cells or IgE knock out mice.
    Results: Only those mice sensitised with HDM responded to subsequent low dose topical challenge. Similar to the classical ovalbumin model, there was no requirement for systemic alum sensitisation. Characterisation of the role of effector cells demonstrated that the allergic cellular inflammation and AHR was dependent on CD4(+) and CD8(+) T cells but not B cells or IgE. Finally, we show that this model, unlike the classic OVA model, appears to be resistant to developing tolerance.
    Conclusions: This CD4(+)/CD8(+) T cell dependent, HDM driven model of allergic asthma exhibits key features of asthma. Furthermore, we suggest that the ability to repeat challenge with HDM means this model is amenable to studies exploring the effect of therapeutic dosing in chronic, established disease.
    MeSH term(s) Animals ; Antigens, Dermatophagoides/administration & dosage ; Antigens, Dermatophagoides/immunology ; Asthma/immunology ; Asthma/pathology ; CD4-Positive T-Lymphocytes/immunology ; CD4-Positive T-Lymphocytes/pathology ; CD8-Positive T-Lymphocytes/immunology ; CD8-Positive T-Lymphocytes/pathology ; Cells, Cultured ; Disease Models, Animal ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Knockout ; Pyroglyphidae/immunology ; Respiratory Hypersensitivity/immunology ; Respiratory Hypersensitivity/pathology
    Chemical Substances Antigens, Dermatophagoides
    Language English
    Publishing date 2016-04-25
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2041675-1
    ISSN 1465-993X ; 1465-993X
    ISSN (online) 1465-993X
    ISSN 1465-993X
    DOI 10.1186/s12931-016-0359-y
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Positional information, in bits.

    Dubuis, Julien O / Tkacik, Gasper / Wieschaus, Eric F / Gregor, Thomas / Bialek, William

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

    2013  Volume 110, Issue 41, Page(s) 16301–16308

    Abstract: Cells in a developing embryo have no direct way of "measuring" their physical position. Through a variety of processes, however, the expression levels of multiple genes come to be correlated with position, and these expression levels thus form a code for ...

    Abstract Cells in a developing embryo have no direct way of "measuring" their physical position. Through a variety of processes, however, the expression levels of multiple genes come to be correlated with position, and these expression levels thus form a code for "positional information." We show how to measure this information, in bits, using the gap genes in the Drosophila embryo as an example. Individual genes carry nearly two bits of information, twice as much as would be expected if the expression patterns consisted only of on/off domains separated by sharp boundaries. Taken together, four gap genes carry enough information to define a cell's location with an error bar of ~1 along the anterior/posterior axis of the embryo. This precision is nearly enough for each cell to have a unique identity, which is the maximum information the system can use, and is nearly constant along the length of the embryo. We argue that this constancy is a signature of optimality in the transmission of information from primary morphogen inputs to the output of the gap gene network.
    MeSH term(s) Animals ; Cell Movement/physiology ; Drosophila/embryology ; Embryonic Development/physiology ; Gene Expression Regulation, Developmental/genetics ; Gene Regulatory Networks/genetics ; Models, Biological ; Proteins/metabolism
    Chemical Substances Proteins
    Language English
    Publishing date 2013-10-02
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 209104-5
    ISSN 1091-6490 ; 0027-8424
    ISSN (online) 1091-6490
    ISSN 0027-8424
    DOI 10.1073/pnas.1315642110
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Harvesting, isolation, and functional assessment of primary vagal ganglia cells.

    Dubuis, Eric / Grace, Megan / Wortley, Michael A / Birrell, Mark A / Belvisi, Maria G

    Current protocols in pharmacology

    2013  Volume 62, Page(s) 12.15.1–12.15.27

    Abstract: Airway sensory nerves play an important defensive role in the lungs, being central in mediating protective responses like cough and bronchoconstriction. In some cases, these responses become excessive, hypersensitive, and deleterious. Understanding the ... ...

    Abstract Airway sensory nerves play an important defensive role in the lungs, being central in mediating protective responses like cough and bronchoconstriction. In some cases, these responses become excessive, hypersensitive, and deleterious. Understanding the normal function of airway nerves and phenotype changes associated with disease will help in developing new therapeutics for treating chronic obstructive pulmonary disease and chronic cough. Guinea pigs, and to a lesser extent ferrets, are commonly employed for studying the cough reflex because they have a cough response similar to humans. While rats and mice do not exhibit a cough response, they do possess sensory nerves that respond to the same range of tussive stimuli as guinea pigs and humans. Described in this unit are protocols for harvesting guinea pig, mouse, and rat sensory nerve cell bodies to assess molecular and functional changes associated with pulmonary disease, and to identify new targets for therapeutic intervention.
    MeSH term(s) Animals ; Cell Culture Techniques ; Cell Separation/methods ; Ganglia/physiology ; Guinea Pigs ; Indicators and Reagents ; Mice ; Rats ; Respiratory System/innervation ; Sensory Receptor Cells/physiology ; Surgical Instruments ; Tissue and Organ Harvesting/methods ; Vagus Nerve/physiology
    Chemical Substances Indicators and Reagents
    Language English
    Publishing date 2013-10-08
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2179074-7
    ISSN 1934-8290 ; 1934-8282
    ISSN (online) 1934-8290
    ISSN 1934-8282
    DOI 10.1002/0471141755.ph1215s62
    Database MEDical Literature Analysis and Retrieval System OnLINE

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