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  • 1
    Electronic Resource
    Electronic Resource
    Fatty acids and atopic disease (2000)
    Oxford, UK : Munksgaard International Publishers
    Pediatric allergy and immunology 11 (2000), S. 0 
    Details
    ISSN: 1399-3038
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1034/j.1399-3038.2000.00508.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Fetal peripheral blood mononuclear cell proliferative responses to mitogenic and allergenic stimuli during gestation (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Pediatric allergy and immunology 7 (1996), S. 0 
    Details
    ISSN: 1399-3038
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Blood samples were obtained from fetuses and premature babies (n=51) (15-34 weeks gestation) to determine at what stage the fetal immune system was able to produce a positive proliferative response to common allergens. Peripheral blood mononuclear cells (PB MC) were stimulated with the mitogen, phytohaemagglutinin (PHA), and the allergens, house dust mite, cat fur. birch tree pollen, β-lactoglobulin, ovalbumin and bee venom (mellitin). Results were expressed as ratios of stimulated to unstimulated 3H thymidine incorporation, and as percent positive responders. There was an increase in proliferation ratio which correlated with increasing gestational age for PHA (p 〈 0.0001), cat fur (p=0.042), birch pollen (p=0.022) and β-lactoglobulin (p=0, 006). The point in gestation when cells from some individuals began responding to the allergens with a ratio of 2. 0 was at approximately 22 weeks. PBMC proliferative response ratios were higher from samples from babies 〉 22 weeks gestation compared to 〈 22 weeks for the mitogen and all allergens, except mellitin. There was also a greater proportion of positive responders from samples 〉 22 weeks compared to 〈 22 weeks for the mitogen and all allergens, except mellitin. Maternal exposure to birch pollen, which has a discrete season, was assessed to determine whether exposure had occurred at 22 weeks gestation or beyond. Results showed a higher prolifera tive response in infant cells stimulated with birch pollen (p=0.005) and higher proportion of positive responders (p=0.01) in the group of babies whose mothers had been exposed to hirch pollen beyond 22 weeks, compared to those whose mothers had not been so exposed. These results suggest that in utero fetal exposure to an allergen from around 22 weeks gestation may result in primary sensitisation to that allergen, leading to positive proliferative responses, at birth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3038.1996.tb00117.x
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  • 3
    Electronic Resource
    Electronic Resource
    Altered T lymphocyte phenotype at birth in babies born to atopic parents (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Pediatric allergy and immunology 5 (1994), S. 0 
    Details
    ISSN: 1399-3038
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Flow cytometry was used to analyse the cord blood T cells of 33 babies at high risk ‘HR’ for developing allergy (born to at least one atopic, asthmatic parent), and 10 low risk ‘LR’ babies (born to non-atopic parents), following normal term deliveries. Significantly lower numbers of CD25+, (activated) T cells (p〈0.005) were seen in the cord blood of the HR babies who had developed both allergic symptoms and positive skin prick tests by one year of age when compared with the LR group. CD45RO+ (memory) T cells were detected in both HR and LR babies with a trend for lower numbers of memory cells to be detected in HR infants who later developed allergic symptoms and/or positive skin prick tests. Significantly lower numbers of CD4+/CD45RO+ were seen in the cord blood of HR babies who developed allergic symptoms compared to HR babies who showed no sign of allergy by one year and to the LR babies (p〈0.05 and p〈0.005). The presence of activated and memory T cells at birth implies intra-uterine priming. The significantly lower numbers of memory T cells in the HR babies suggests a suppression of T cell activation or lack of antigenic priming in this group. This prenatal influence on babies born to atopic parents may have important implications with regard to the mechanisms underlying atopic sensitisation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3038.1994.tb00240.x
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  • 4
    Electronic Resource
    Electronic Resource
    Prenatal sensitisation (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Pediatric allergy and immunology 7 (1996), S. 0 
    Details
    ISSN: 1399-3038
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3038.1996.tb00406.x
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  • 5
    Electronic Resource
    Electronic Resource
    Peripheral blood mononuclear cell proliferative responses in the first year of life in babies born to allergic parents (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Clinical & experimental allergy 26 (1996), S. 0 
    Details
    ISSN: 1365-2222
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background Raised peripheral blood mononuclear cells (PBMCs) proliferative responses to food allergens have been demonstrated in children with established atopic dermatitis.Objective In this report we investigate the PBMC proliferative responses to inhalant and food allergens from babies at birth, 6 months and 1 year of age, born to atopic and non-atopic parents.Methods PBMCs, separated by density gradient centrifugation. were cultured for 6 days with autologous plasma and a range of allergens (house dust mite [HDM], cat, grass pollen, tree pollen, betalactoglobulin and ovalbumin). Proliferative responses were measured by the uptake of [3H] thymidine added for the final 18 h of culture.Results At birth, infants born to atopic parents who developed allergic disease by 1 year of age had significantly more positive responses (stimulation index ± 2 with a value of ± 1000 cpm above background) to HDM (P = 0.0091), betalactoglobulin (P= 0.0166) and ovalbumin (P = 0.0035) than newborns who did not develop allergy. Tnfants who developed allergy also had significantly more positive responses to HDM (P - 0.03) and ovalbumin (P = 0.0057) than babies, born to non-atopic parents, who did not develop allergies. At 6 months of age a significant fall in response to HDM (P = 0.003) and cat fur extract (P = 0.006) was seen in infants who developed allergic disease by 1 year of age. A similar pattern was seen for proliferative responses to betalactoglobulin and ovalbumin (P = 0.0006. P= 0.004). Conversely, proliferations to grass and tree pollen extracts increased at 6 months (P = 0.04. P = NS) and 1 year (P= NS. P= 0.01) compared with birth which was significant for infants who did not develop allergic disease.Conclusion Proliferative responses to seasonal allergens increased over the first year of life whilst those to perennial allergens, both inhalant and food, fell. This suggests either the induction of a systemic immune tolerance by perennial exposure to antigens or movement of sensitized cells to target organs where allergen exposure occurs. This process may be independent of the development allergic disease.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2222.1996.tb00608.x
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  • 6
    Electronic Resource
    Electronic Resource
    Is deficiency of interferon gamma production by allergen triggered cord blood cells a predictor of atopic eczema? (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Clinical & experimental allergy 24 (1994), S. 0 
    Details
    ISSN: 1365-2222
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract. Peripheral blood mononuclear cell proliferative responses and interferon-γ product ion to anti-CD3, cat fur extract, betalactoglobulin and ovalbumin were determined al birth in a group of 34 babies born to families where at least one parent was; atopic. The development of atopic eczema with positive allergy skin-prick tests to cows’ milk and egg at 1 year of age, where the symptoms improved on an egg and milk-free diet, was significantly associated with raised proliferative responses and defective IFN-γ production to stimulation with betalactoglobulin with a trend for similar responses to ovalbumin. This was not observed in those who did not develop atopic eczema or those with atopic eczema not associated with foods. Responses to cat fur extract were not significantly different between those with and without atopic eczema. This has important implications for the prediction at birth, not only of the probability of being allergic, but also of the specific allergens which will cause problems. The implementation of specific targeted allergen avoidance during the critical period in infancy, therefore, should be more easily applied and should facilitate attempts to prevent disease.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2222.1994.tb00930.x
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  • 7
    Electronic Resource
    Electronic Resource
    In vitro effects of eicosanoids derived from different 20-carbon fatty acids on T helper type 1 and T helper type 2 cytokine production in human whole-blood cultures (2003)
    Oxford, UK : Blackwell Science Ltd
    Clinical & experimental allergy 33 (2003), S. 0 
    Details
    ISSN: 1365-2222
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background Different series prostaglandins (PGs) and leukotrienes (LTs) are synthesized from different 20 carbon fatty acid precursors. The effects of the different series of PGs and LTs on production of T helper type 1 (Th1) and Th2 cytokines by human cells are not well established.Objective To characterize the influence of PGs and LTs produced from different fatty acid precursors on the Th1 and Th2 cytokine profile in mitogen-stimulated human whole-blood cultures.Methods Blood from healthy adult males was diluted and cultured with concanavalin A in the presence or absence of a range of concentrations of various PGs or LTs. Cytokine concentrations in culture supernatants were analysed by enzyme-linked immunosorbent assay (ELISA).Results PGE1, PGE2 and PGE3 significantly and dose-dependently decreased the concentrations of the Th1 cytokines IL-2 and IFN-γ by up to 50% and 70%, respectively. The three PGs exhibited similar potency towards IFN-γ production. At the highest concentration used (10−6 m) PGE1, but not PGE2 or PGE3, increased the concentration of the Th2 cytokine IL-4 by about 70%. IL-10 production was not affected by PGs. The ratio of the concentrations of IFN-γ to IL-4 was significantly decreased at PGE concentrations of 10−7 and 10−6 M with all three PGEs having similar effects. LTB4, LTC4 and LTC5 did not significantly affect production of the cytokines studied.Conclusion PGE produced from different fatty acids significantly decrease Th1 cytokine production resulting in a shift in the Th1, Th2 balance in favour of a Th2 response. PGE produced from different fatty acid precursors are equipotent in their effects on human T lymphocytes. Thus, although changes in the pattern of dietary fatty intakes may contribute to the increased prevalence of atopic disease, this would probably not be mediated through substitution of one PGE with another from a different series. It may, however, be mediated through a change in the total amount of PGE produced at the site of antigen presentation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2222.2003.01637.x
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  • 8
    Electronic Resource
    Electronic Resource
    Maternofetal interaction and allergy (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Allergy 51 (1996), S. 0 
    Details
    ISSN: 1398-9995
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1398-9995.1996.tb04650.x
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