Project description:Peripheral blood samples from children enrolled in the URECA cohort were collected at age 2. In short, at each URECA research center, within 16 hours of blood collection, mononuclear cells were separated and incubated (48 hours, 37C, 5% CO2) in the presence of German cockroach extract (10mg/mL; CR), dust mite extract (Dermatophagoides pteronyssinus, 10mg/mL; DM), tetanus toxoid (5mg/mL; TT), or medium alone (NS).
Project description:Infection with Nippostrongylus brasiliensis results in persistent changes to the lung environment. Cytokine profiling reveals a sustained increase in both Th1 and Th2 transcripts. Cellular populations of macrophages display an alternative phenotype, with upregulation of YM1, Arg1, Mrc1 as well as Class II MHC. These alternatively activated alveolar macrophages (AAAMs) also increase drastically in number. Subsequent challenge with house dust mite (HDM) Dermatophagoides pteronyssinus shows a reduced allergic phenotype, with decreased fold changes in effector cell cytokines of both the Th1 and Th2 variety indicative of the new regulatory environment established in the lung by helminth infection. Histological examination of the lung environment reveals a significant decrease in eosinophila and reduced mucous production by bronchial epithelial cells. Keywords: Timecourse, Infection, Allergy Model
