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  • 1
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Pediatric allergy and immunology 7 (1996), S. 0 
    ISSN: 1399-3038
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Clinical & experimental allergy 26 (1996), S. 0 
    ISSN: 1365-2222
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Background Viral respiratory tract infections have been previously considered to be associated with induction of allergic sensitization.Objective and Methods In order to investigate this relationship in an animal model, guinea-pigs were inoculated intranasally with Parainfluenza-3-(PI-3) virus (n= 16) or virus-free culture medium (controls, n= 12), sensitized at day 4 with inhaled ovalbumin (OA) and challenged 3 weeks later with inhaled OA using specific bronchial provocation testing with body piethysmographic measurement of compressed air (CA). Furthermore, specific anti-OA-IgGl-antibodies in serum before challenge were determined by enzyme hnked immunosorbent assay (ELISA). For investigation of airway epithelium permeability horseradish peroxidase (HRP) was inhaled at day 4 after inoculation by six animals, and HRP serum concentrations were determined by a direct ELISA 30 min after inhalation.Results PI-3 infected animals were found to be significantly more sensitized to OA compared with controls, with higher CA values (P 〈 0.001) on specific bronchial provocation and with increased specific anti-OA-IgGl titers. Serum-HRP concentrations were about 20 times higher in the infected animals compared with controls. PI-3 infected and sham-infected animals had comparable bronchial reactions on specific provocation with OA when sensitized systemically.Conclusions We conclude that viral respiratory tract infection with PI-3 virus enhances inhaiative allergic sensitization in the guinea-pig. Increased mucosal permeability to antigens may be an important pathophysiological mechanism.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    ISSN: 1398-9995
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Recent studies demonstrate reduced interferon-gamma (IFN-γ) secretion in neonates who became atopic later in life. The underlying pathomechanism is still unknown. We therefore examined the effects of bacterial products on neonatal IFN-γ production acting through different T-cell- or antigen-presenting-cell (APC)-stimulating mechanisms: cord-blood mononuclear cells (CBMC) were incubated with lipopolysaccharide (LPS), staphylococcal enterotoxin E (SEE), or a combination of both and restimulated with PMA and ionomycin. LPS and SEE as single stimuli induced IFN-γ production to the same extent in CBMC of neonates with high and low risk of atopy. In contrast, a combination of LPS and SEE had a multiplying effect on IFN-γ secretion only in CBMC of neonates with low risk of atopy. Phenotype analysis revealed that only memory T cells showed impaired IFN-γ synthesis (median 3.6% IFN-γ-producing cells vs 14.2% in controls; P 〈 0.01), whereas IFN-γ production by naive T cells did not differ in either group. Taken together, these results point to the existence of a disturbed function of costimulatory mechanisms in neonates at high risk of atopy, provoking reduced memory T-cell IFN-γ production.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    ISSN: 1398-9995
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: To assess the relation among eosinophil-related variables in the peripheral blood, bronchial hyperreactivity, and the presence of atopic dermatitis in children aged 5–14 years, we studied 11 patients with atopic dermatitis alone, six with asthma and atopic dermatitis, 12 with asthma alone, and 12 healthy controls. Eosinophil counts, levels of eosinophil cationic protein, and the capacity of eosinophils to generate leukotriene (LT) C4, as well as bronchial hyperreactivity and a severity score for atopic dermatitis, were determined. Eosinophil variables were significantly higher in both patient groups with atopic dermatitis than in normal controls. In particular, ionophore A 23187 LTC4 generation was higher in patients with atopic dermatitis alone (median 82, range 25–273 ng/106 cells) and patients with combined asthma and atopic dermatitis (median 68, range 32–583 ng/106 cells) than in normal controls (median 9, range 1–67 ng/106 cells). However, there was no difference between the group of atopic dermatitis patients with asthma and without asthma. We conclude that eosinophil variables in the peripheral blood are mainly influenced by the presence of atopic dermatitis, and not the presence and the severity of asthma in patients with both asthma and atopic dermatitis.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Allergy 51 (1996), S. 0 
    ISSN: 1398-9995
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Formaldehyde (FA), a common indoor air pollutant, has been associated with increased prevalence rates of asthmatic symptoms among exposed individuals in epidemiologic surveys. We studied the influence of FA exposure on inhalative allergic sensitization in the guinea pig. Three groups of guinea pigs (n= 12 each) were exposed to clean air or two different FA concentrations (0.13 and 0.25 ppm) over 5 consecutive days. Exposure was followed by inhalation of 0.5% ovalbumin (OA) as sensitizing allergen. Three weeks later, specific bronchial provocation with OA was performed with body plethysmographic measurement of compressed air (CA). Furthermore, specific anti-OA-IgGI (reaginic) antibodies were determined in serum. In a further six animals, the respiratory tract was examined histologically for signs of inflammation directly after the end of FA or clean air exposure. In the group exposed to 0.25 ppm FA, 10/12 animals were found to be sensitized to OA (positive reaction on specific provocation) vs. 3/12 animals in the control group (P〈0.01). Furthermore, CA measurements of specific bronchial provocation and serum anti-OA-antibodies were significantly higher in the 0.25 ppm FA group than in controls (CA 0.35 vs. 0.09 ml median, P〈0.01; anti-OA-IgC1 13 vs. 〈10 EU median, P〈0.05), indicating enhanced sensitization. In the group exposed to 0.13 ppm FA, no significant difference was found compared to the control group. There was no sign of inflammation of the lower airways in FA-exposed guinea pigs other than mucosal edema, which was discovered by morphometry. We conclude that short-term exposure to a low concentration of FA (0.25 ppm) can significantly enhance sensitization to inhaled allergens in the guinea pig.
    Materialart: Digitale Medien
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  • 6
    ISSN: 1432-1173
    Schlagwort(e): Schlüsselwörter Neonataler Lupus erythematosus ; HELLP-Syndrom ; Antikörper ; Key words Neonatal lupus erythematosus ; HELLP syndrome ; Antibodies
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Beschreibung / Inhaltsverzeichnis: Summary A newborn boy developed annular erythematous lesions on his entire body. Histopathological examination showed typical features of lupus erythematosus. His mother was positive for anti-Ro/SSa and anti-La/SSb antibodies. Neonatal lupus erythematosus was diagnosed. During pregnancy the mother had suffered from HELLP syndrome. The reported case points out the necessity to differentiate HELLP syndrome from first manifestation of lupus erythematosus during pregnancy. A direct causal relationship between neonatal lupus erythematosus and HELLP syndrome of the mother seems to be unlikely.
    Notizen: Zusammenfassung Wir berichten über einen Säugling, der im Alter von 8 Wochen anuläre Erytheme am gesamten Integument entwickelte. Histologisch fand sich das typische Bild eines Lupus erythematosus. Im Serum der Mutter ließen sich Anti-Ro/SSA- und Anti-La/SSB-Antikörper nachweisen. Es wurde ein neonataler Lupus erythematosus diagnostiziert. Die Schwangerschaft war durch das Auftreten eines HELLP-Syndroms kompliziert worden. Der dargestellte Fall weist auf die Notwendigkeit hin, ein HELLP-Syndrom differentialdiagnostisch von einer Erstmanifestation eines Lupus erythematosus in der Schwangerschaft abzugrenzen. Ein direkter pathoge-netischer Zusammenhang zwischen neonatalem Lupus erythematosus und HELLP-Syndrom wird für unwahrscheinlich gehalten.
    Materialart: Digitale Medien
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  • 7
    Digitale Medien
    Digitale Medien
    Springer
    European journal of pediatrics 156 (1997), S. 333-334 
    ISSN: 1432-1076
    Schlagwort(e): Key words Purine nucleoside phosphorylase dieficiency  ;   Immunodeficiency  ;  Varicella  ;  non Hodgkin lymphoma
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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