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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Ltd
    Clinical & experimental allergy 34 (2004), S. 0 
    ISSN: 1365-2222
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background Basophils and mast cells play a major role in the pathogenesis of allergic disorders by releasing several proinflammatory mediators. Some histamine H1 receptor antagonists exert anti-inflammatory activities by modulating mediator release from basophils and mast cells.Objective To study the in vitro effects of mizolastine, an H1 receptor antagonist, on the release of eicosanoids, histamine and IL-4 from human basophils and lung mast cells.Methods and results Mizolastine (10−7–10−5 m) concentration-dependently inhibited the release of cysteinyl leukotriene C4 from anti-IgE-stimulated basophils (IC50: 3.85±0.28 μm) and mast cells (IC50: 3.92±0.41 μm). The same concentrations of mizolastine did not affect anti-IgE-induced prostaglandin D2 release from lung mast cells. In contrast, mizolastine enhanced up to 80% IgE-mediated histamine release (EC50: 4.63±0.14 μm) from basophils, but not from mast cells and it significantly potentiated IL-4 release from basophils induced by anti-IgE. Mizolastine did not affect histamine release from basophils induced by formyl peptide, whereas it inhibited cysteinyl leukotriene C4 release (IC50: 1.86±0.24 μm). Blockade of cytosolic phospholipase A2 and arachidonic acid mobilization by pyrrolidine-1 did not alter the effect of mizolastine on histamine release from basophils, thereby excluding accumulation of arachidonic acid metabolic intermediates as the cause of this effect. Mizolastine did not influence anti-IgE-induced activation of extracellular signal-regulated kinase-1 and -2 (ERK-1 and -2) in human basophils.Conclusions Mizolastine efficiently inhibits LTC4 synthesis in human basophils and mast cells presumably by interfering with 5-lipoxygenase. In contrast, it enhances histamine and IL-4 release only from anti-IgE-stimulated basophils. Therefore, mizolastine differentially regulates the production of mediators from basophils and mast cells in a cell- and stimulus-specific fashion.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Ltd
    Clinical & experimental allergy 32 (2002), S. 0 
    ISSN: 1365-2222
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Comparative Biochemistry and Physiology -- Part A: Physiology 48 (1974), S. 1-4+IN1-IN2+5-7 
    ISSN: 0300-9629
    Keywords: Black widow spider venom ; Latrodectus venom ; Torpedo torpedo ; acetylcholine ; acetylcholine release ; electric tissue ; synaptosomes
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 29 (1973), S. 1525-1527 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Infection 14 (1986), S. S335 
    ISSN: 1439-0973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bisher wurden in Italien im Rahmen klinischer Studien 2003 Patienten mit verschiedenen Infektionskrankheiten mit Ofloxacin behandelt. Am häufigsten wurden Dosen von 200 mg, 300 mg oder 400 mg zweimal täglich verabreicht. Insgesamt wurden bei 116 Patienten (5,8%) 130 Nebenwirkungen beobachtet, darunter gastrointestinale Beschwerden (meist Übelkeit, Erbrechen und Magenschmerzen) bei 4,8% der Patienten, neurologische Symptome (meist Kopfschmerzen und Schlafstörungen) bei 0,7% der Patienten, Hautreaktionen bei 0,4% der Patienten und andere unerwünschte Nebenwirkungen bei 0,7% der Patienten. Eine kausale Beziehung zwischen Medikation und Nebenwirkung wurde von den Untersuchern bei 5,0% der Ereignisse für unwahrscheinlich angesehen, bei 47,1% für möglich, bei 31,4% für wahrscheinlich und bei 16,5% für nahezu sicher. Der Schweregrad der unerwünschten Nebenwirkungen wurde in 55% der Fälle als leicht eingestuft, in 38% als mittelschwer und in 7% als schwer. Das Auftreten unerwünschter Nebenwirkungen veranlaßte bei 30 Patienten (1,5%) ein Abbrechen der Behandlung. Bei 25 Patienten (2,1%) wurden Laborwerte außerhalb des Normbereichs festgestellt und ein Zusammenhang mit der Medikation als wahrscheinlich angenommen. Ofloxacin wird gut vertragen, sein Sicherheitsprofil ist mit demjenigen der bestverträglichen oralen Antibiotika vergleichbar.
    Notes: Summary In clinical trials performed in Italy, 2,003 patients, suffering from various infectious diseases, have so far been treated with ofloxacin. In most cases dosages of 200 mg, 300 mg or 400 mg b. i. d. have been used. In all, 130 adverse reactions have been recorded in 116 patients (5.8%): gastrointestinal events (mostly nausea, vomiting and gastric pain) in 4.8% of the patients, neurological events (mostly headache and insomnia) in 0.7%, cutaneous reactions in 0.4% and others in 0.5% cases. The drug-event causal relationship was assessed by the investigators as unlikely in 5.0% of the events, as possible in 47.1%, as probable in 31.4% and as almost certain in 16.5%. The severity of adverse reactions was judged as mild in 55% of the cases, as moderate in 38% and as severe in 7%. In 30 patients (1.5%), treatment was discontinued because of occurrence of side effects. Abnormal laboratory values probably related to treatment were reported in 25 patients (2.1%). Ofloxacin is well tolerated and shows a safety profile comparable with that of the best tolerated oral antibacterials.
    Type of Medium: Electronic Resource
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