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Troy S, Parks V, Purkayastha J, Gossart S, Goodman DB, Achenbach H, Armstrong M, Martin PT. Effect of anagrelide on cardiac repolarization in healthy volunteers: a randomized, double-blind, placebo- and positive-controlled, thorough QT study. Pharmacol Res Perspect 2014. [DOI: 10.1002/prp2.80] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Affiliation(s)
- Steven Troy
- Global Clinical Pharmacology and Pharmacokinetics; Shire Pharmaceuticals; Wayne Pennsylvania
| | - Virginia Parks
- Global Clinical Pharmacology and Pharmacokinetics; Shire Pharmaceuticals; Paris France
| | - Jaideep Purkayastha
- Clinical Development Operations and Biometrics; Shire Pharmaceuticals; Wayne Pennsylvania
| | - Sophie Gossart
- Global Clinical Pharmacology and Pharmacokinetics; Shire Pharmaceuticals; Paris France
| | | | | | | | - Patrick T. Martin
- Global Clinical Pharmacology and Pharmacokinetics; Shire Pharmaceuticals; Wayne Pennsylvania
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Korth-Bradley JM, Parks V, Wagner F, Chalon S, Gourley I, Matschke K, Gossart S, Ripp SL, Fleckenstein L. Effect of moxidectin on CYP3A4 activity as evaluated by oral midazolam pharmacokinetics in healthy subjects. Clin Pharmacol Drug Dev 2013; 3:151-7. [PMID: 27128460 DOI: 10.1002/cpdd.81] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2013] [Accepted: 09/19/2013] [Indexed: 11/11/2022]
Abstract
In order to evaluate the potential for CYP3A4 induction by moxidectin, midazolam pharmacokinetic (PK) parameters were compared before and after moxidectin administration. Healthy subjects received a single 8 mg dose of moxidectin and 3 single 7.5 mg doses of midazolam 3 days before, and 7 and 89 days after the moxidectin. Blood samples were taken for 24 hours to measure midazolam and metabolites in plasma, and for 89 days to measure moxidectin in plasma after dose administration. Noncompartmental PK analyses were performed for each analyte. Analysis of variance was performed on log-transformed midazolam parameters with treatment day as a fixed effect. Adverse events were recorded and laboratory tests, physical examinations, pulse oximetry monitoring, vital sign measurement, and electrocardiograms performed. Thirty-nine subjects were enrolled in the study; PK data were available for 37 subjects. Moxidectin PK parameters were similar to previous studies. There were no significant changes in PK for midazolam or its metabolites 7 or 89 days after moxidectin administration. Adverse events were generally mild and there were no relevant changes in safety assessments. Thus, 8 mg moxidectin does not induce CYP3A4 activity and other CYP3A4 substrates are unlikely to be affected by moxidectin co-administration.
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Affiliation(s)
| | | | - Frank Wagner
- Charité Research Organisation GmbH, Berlin, Germany
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Orfila C, Lepert JC, Gossart S, Frisach MF, Cambon C, Pipy B. Immunocytochemical characterization of lung macrophage surface phenotypes and expression of cytokines in acute experimental silicosis in mice. Histochem J 1998; 30:857-67. [PMID: 10100728 DOI: 10.1023/a:1003485312164] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The expression of the surface phenotypical profile and the cytokines TNF-alpha and IL-1beta from murine lung macrophages was studied in parenchymal lung tissue and bronchoalveolar fluid of mice, over a 2-week period, following a single intratracheal instillation of silica. The acute inflammatory reaction, confirmed by a significant augmentation of four times the control values of the number of macrophages recovered by lavage from experimental animals, was followed by organized granulomas in the interstitium. The immunohistochemical analysis of lung tissue sections after silica instillation demonstrated the increased alveolar and interstitial tissue expression of all surface antigens and cytokines studied, mainly Mac-1, F4/80 antigens, TNF-alpha and IL-1beta, which were occasionally observed in normal uninjected and saline-treated mice. These findings show that, after silica instillation, the expression of surface phenotypical markers of lung macrophages increased, and this change was concomitantly associated with an increased expression of the cytokines TNF-alpha and IL-1beta. These changes support the conclusion that an influx of the newly recruited and activated macrophage population, with a different phenotype, is induced by treatment during inflammation. The populational changes involve difference in functional activity and enhance TNF-alpha and IL-1beta expression. These cytokines, produced in the silicosis-induced inflammatory process, are associated with the development of fibrosis and may contribute to disease severity.
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Affiliation(s)
- C Orfila
- UPRES EA-2405, CHU Rangueil, Toulouse, France
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Quartulli F, Pinelli E, Broué-Chabbert A, Gossart S, Girard V, Pipy B. Fenspiride inhibits histamine-induced responses in a lung epithelial cell line. Eur J Pharmacol 1998; 348:297-304. [PMID: 9652346 DOI: 10.1016/s0014-2999(98)00157-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Using the human lung epithelial WI26VA4 cell line, we investigated the capacity of fenspiride, an anti-inflammatory drug with anti-bronchoconstrictor properties, to interfere with histamine-induced intracellular Ca2+ increase and eicosanoid formation. Histamine and a histamine H1 receptor agonist elicited a rapid and transient intracellular Ca2+ increase (0-60 s) in fluo 3-loaded WI26VA4 cells. This response was antagonized by the histamine H1 receptor antagonist, diphenhydramine, the histamine H2 receptor antagonist, cimetidine, having no effect. Fenspiride (10(-7)-10(-5) M) inhibited the histamine H1 receptor-induced Ca2+ increase. In addition, histamine induced a biphasic increase in arachidonic acid release. The initial rise (0-30 s), a rapid and transient arachidonic acid release, was responsible for the histamine-induced intracellular Ca2+ increase. In the second phase release (15-60 min), a sustained arachidonic acid release appeared to be associated with the formation of cyclooxygenase and lipoxygenase metabolites. Fenspiride (10(-5) M) abolished both phases of histamine-induced arachidonic acid release. These results suggest that anti-inflammatory and antibronchoconstrictor properties of fenspiride may result from the inhibition of these effects of histamine.
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Affiliation(s)
- F Quartulli
- Laboratoire Macrophages-Médiateurs de l'Inflammation et Interactions Cellulaires, UPS EA 2405, INSERM Institut Fédératif de Recherche 31 Louis Bugnard, CHU Rangueil, Toulouse, France
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Gossart S, Cambon C, Orfila C, Séguélas MH, Lepert JC, Rami J, Carré P, Pipy B. Reactive oxygen intermediates as regulators of TNF-alpha production in rat lung inflammation induced by silica. The Journal of Immunology 1996. [DOI: 10.4049/jimmunol.156.4.1540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Abstract
Exposure to mineral dusts such as silica has been associated with progressive pulmonary inflammation and fibrosis. There is evidence that the release of reactive oxygen intermediates (ROI) and cytokines by alveolar macrophages (AM) is involved in lung injury associated with silica exposure. However, the chronology and relationship between these two mediators are poorly understood. In this study, an animal model of silicosis has been used, allowing simultaneous follow-up of lung histopathologic state, AM TNF-alpha production at the protein (biologic assay) and mRNA (reverse transcriptase-PCR) levels, and the release of ROI (luminol-dependent chemiluminescence), after bronchoalveolar lavages. In particular, it has been shown that intratracheal instillation of silica (50 mg/kg) in rats led to fibrosis characterized by cellular interstitial infiltrates with granulomas, and in AM, it led to 1) an early and continuous increase in 12-O-tetradecanoylphorbol-13-acetate- or zymosan-triggered ROI production (days 1, 3, 14, and 28 post-treatment), and 2) a rise of TNF-alpha mRNA expression and protein secretion on days 3 and 14. A free radical scavenger pretreatment (N-ter-butyl-alpha-phenylnitrone) reversed lung histopathologic changes and decreased AM ROI production and TNF-alpha expression at the level of mRNA. These findings suggest that ROI production is an important primary event determining the silica-induced inflammatory process. ROI may act in an autocrine or paracrine manner and regulate TNF-alpha production by a mechanism promoting gene expression. The critical role of this cytokine in the pathogenesis of silicosis was confirmed by anti-TNF-alpha Ab treatment.
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Affiliation(s)
- S Gossart
- INSERM Unit CJF 9107, Louis Bugnard Institute, P. Sabatier University-Toulouse, France
| | - C Cambon
- INSERM Unit CJF 9107, Louis Bugnard Institute, P. Sabatier University-Toulouse, France
| | - C Orfila
- INSERM Unit CJF 9107, Louis Bugnard Institute, P. Sabatier University-Toulouse, France
| | - M H Séguélas
- INSERM Unit CJF 9107, Louis Bugnard Institute, P. Sabatier University-Toulouse, France
| | - J C Lepert
- INSERM Unit CJF 9107, Louis Bugnard Institute, P. Sabatier University-Toulouse, France
| | - J Rami
- INSERM Unit CJF 9107, Louis Bugnard Institute, P. Sabatier University-Toulouse, France
| | - P Carré
- INSERM Unit CJF 9107, Louis Bugnard Institute, P. Sabatier University-Toulouse, France
| | - B Pipy
- INSERM Unit CJF 9107, Louis Bugnard Institute, P. Sabatier University-Toulouse, France
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Gossart S, Cambon C, Orfila C, Séguélas MH, Lepert JC, Rami J, Carré P, Pipy B. Reactive oxygen intermediates as regulators of TNF-alpha production in rat lung inflammation induced by silica. J Immunol 1996; 156:1540-8. [PMID: 8568258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Exposure to mineral dusts such as silica has been associated with progressive pulmonary inflammation and fibrosis. There is evidence that the release of reactive oxygen intermediates (ROI) and cytokines by alveolar macrophages (AM) is involved in lung injury associated with silica exposure. However, the chronology and relationship between these two mediators are poorly understood. In this study, an animal model of silicosis has been used, allowing simultaneous follow-up of lung histopathologic state, AM TNF-alpha production at the protein (biologic assay) and mRNA (reverse transcriptase-PCR) levels, and the release of ROI (luminol-dependent chemiluminescence), after bronchoalveolar lavages. In particular, it has been shown that intratracheal instillation of silica (50 mg/kg) in rats led to fibrosis characterized by cellular interstitial infiltrates with granulomas, and in AM, it led to 1) an early and continuous increase in 12-O-tetradecanoylphorbol-13-acetate- or zymosan-triggered ROI production (days 1, 3, 14, and 28 post-treatment), and 2) a rise of TNF-alpha mRNA expression and protein secretion on days 3 and 14. A free radical scavenger pretreatment (N-ter-butyl-alpha-phenylnitrone) reversed lung histopathologic changes and decreased AM ROI production and TNF-alpha expression at the level of mRNA. These findings suggest that ROI production is an important primary event determining the silica-induced inflammatory process. ROI may act in an autocrine or paracrine manner and regulate TNF-alpha production by a mechanism promoting gene expression. The critical role of this cytokine in the pathogenesis of silicosis was confirmed by anti-TNF-alpha Ab treatment.
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Affiliation(s)
- S Gossart
- INSERM Unit CJF 9107, Louis Bugnard Institute, P. Sabatier University-Toulouse, France
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