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  • 1
    Digitale Medien
    Digitale Medien
    Effect of azelastine on the seasonal increase in non-specific bronchial responsiveness to methacholine in pollen allergic patients. A randomized, double-blind placebo-controlled, crossover study (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Clinical & experimental allergy 22 (1992), S. 0 
    Details
    ISSN: 1365-2222
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Azelastine, a phthalazinone derivative, is a new potent, long acting, orally active anti-allergic compound with particularly strong H1-histamine receptor antagonistic effects which has been proven to possess in vitro and in vivo a number of anti-inflammatory properties. The aim of the present study was to investigate whether azelastine would be able to prevent and/or reverse the seasonal increase in non-specific bronchial responsiveness to methacholine in pollen allergic patients. Twelve atopic patients (5 males, mean age 31 years), skin positive exclusively to grass and/or Parietaria pollen extract, with rhinitis and mild asthma occurring in the spring for at least two years previously, were studied. After a 2 week run-in period, oral azelastine, 4 mg twice daily, or placebo, was given for 2 weeks from the start of the pollen season, according to a randomized, double-blind design. After 2 weeks, the treatments were crossed over. During both the run-in and study periods, patients recorded rhinitis and asthma symptoms, additional antihistamine and bronchodilator drugs taken and peak expiratory flow measurements. A methacholine inhalation test was carried out on four occasions in each patient: before the run-in period, before the start of the treatment, and at the end of the two 2 week treatment periods. Azelastine significantly reduced rhinitis symptoms and the need for antihistamine drugs, whereas asthmatic symptoms, use of bronchodilator drugs, peak flow recordings and bronchial responsiveness to methacholine were unaffected by the treatment. Compliance level and adverse side-effects were not significantly different between active treatment and placebo. In the final subjective evaluation of the two treatments, eight out of 12 patients preferred azelastine. Thus, azelastine has been confirmed to be effective and safe in the treatment of seasonal allergic rhinitis. However, in our patients, we have not been able to demonstrate any anti-asthmatic action of the drug.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2222.1992.tb03098.x
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Autoradiographic study of the penetration of radiolabelled dextrans and inulin through non-keratinized oral mucosain vitro (1977)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of periodontal research 12 (1977), S. 0 
    Details
    ISSN: 1600-0765
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Although a well known barrier effect against the penetration of macromolecules exists at the basement membrane region of epithelial tissues, recent reports suggest that the penetration of smaller molecules may also be impeded by this region. Considering the probable importance of the permeability of gingival crevicular tissues in the etiology of inflammatory periodontal disease, the present study was designed to evaluate the barrier function of the basement membrane region of non-keratinized oral mucosal epithelium to a series of radiolabelled penetrating molecules of increasing molecular weight. Tritium labeled inulin (ℳ 5,000), dextran 20 (ℳ 20,000) and dextran 70 (ℳ 70,000) were used as penetrating molecules, and autoradiographic tracer techniques were used to evaluate the barrier function. The study was conducted in vitro to eliminate vascular “wash-out” effects and to facilitate study of penetration across the basement membrane region in both directions. The results indicated that although the penetration of inulin and dextran 70 was impeded by the basement membrane region, the penetration of dextran 20 was not affected. Therefore, the barrier function of the basement membrane region is not solely dependent on the molecular weight of the penetration molecule. Mechanisms to account for the findings are described and the significance to periodontal disease is discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1600-0765.1977.tb01527.x
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  • 3
    Digitale Medien
    Digitale Medien
    Hepatic iron overload in thalassemic patients: Proposal and validation of an MRI method of assessment (1996)
    Springer
    Pediatric radiology 26 (1996), S. 650-656 
    Details
    ISSN: 1432-1998
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Background. A simple, accurate, reproducible and noninvasive method of body iron overload assessment would be of great clinical use.Objective. The purpose of the study was the implementation of a 0.5-T MRI method for liver iron overload measurement.Materials and methods. Thirty patients with thalassemia major took part in the study. Liver and paraspinal muscle signal intensity (SI) measurements were performed on T1-weighted images and normalized on a standard phantom, and a subjective hemochromatosis grading scale was made on both T1- and T2-weighted images. Serum ferritin levels and tissue iron from liver biopsy specimens were determined for comparison.Results. A close correlation was found between bioptic liver iron and both the liver-to-phantom SI ratio (r = −0.88) and the subjective grading scale (rho = 0.89). Serum ferritin correlated poorly with liver iron deposition, whether assessed by biopsy (r = 0.62) or MRI (r = -0.69).Conclusions. Both the subjective and the quantitative MRI methods proposed here are clinically valuable, with the former being adequate for a gross, the latter for an accurate estimation of tissue iron overload.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01356827
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