Nkurunungi, G; Kabagenyi, J; Nampijja, M; Sanya, RE; Walusimbi, B; Nassuuna, J; Webb, EL; Elliott, AM; LaVIISWA study team; (2017) Schistosoma mansoni-specific immune responses and allergy in Uganda. Parasite immunology, 40 (1). e12506-e12506. ISSN 0141-9838 DOI: https://doi.org/10.1111/pim.12506
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Abstract
Low allergy-related disease (ARD) prevalence in low-income countries may be partly attributed to helminth infections. In the Schistosoma mansoni (Sm)-endemic Lake Victoria islands (Uganda), we recently observed positive helminth-allergy associations, despite low ARD prevalence. To understand how Sm-induced cytokine and antibody profiles might influence allergic response profiles in this population, we assessed Schistosoma worm (SWA)- and egg antigen (SEA)-specific Th1 (IFN-γ), Th2 (IL-5, IL-13) and regulatory (IL-10) cytokine profiles (n = 407), and total (n = 471), SWA-, SEA- and allergen (house dust mite [HDM] and cockroach)-specific (as)IgE and IgG4 profiles (n = 2117) by ELISA. Wheeze was inversely associated with SWA-specific IFN-γ (P < .001) and IL-10 (P = .058), and SEA-specific IL-5 (P = .004). Conversely, having a detectable asIgE response was positively associated with SWA-specific IL-5 (P = .006) and IL-10 (P < .001). Total, SWA-, SEA- and allergen-specific IgE and IgG4 responses were higher among Sm Kato-Katz positive (SmKK+) and skin prick test (SPT)+ individuals compared to SmKK- and SPT- individuals. However, total and asIgG4/IgE ratios were lower among SPT+ and wheezing individuals. We conclude that, in this population, helminth-induced antibody and cytokine responses may underlie individual positive helminth-atopy associations, while the overall IgG4-IgE balance may contribute to the low overall prevalence of clinical allergies in such settings.
Item Type | Article |
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Faculty and Department |
MRC Uganda > UG-Basic Science Faculty of Epidemiology and Population Health > Dept of Infectious Disease Epidemiology & International Health (2023-) Faculty of Infectious and Tropical Diseases > Dept of Clinical Research |
Research Centre | Tropical Epidemiology Group |
PubMed ID | 29171863 |
ISI | 418725100005 |
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