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dc.contributor.advisorGordon, John R.en_US
dc.creatorNayyar, Aartien_US
dc.date.accessioned2009-02-07T09:37:57Zen_US
dc.date.accessioned2013-01-04T04:25:23Z
dc.date.available2010-02-24T08:00:00Zen_US
dc.date.available2013-01-04T04:25:23Z
dc.date.created2009en_US
dc.date.issued2009en_US
dc.date.submitted2009en_US
dc.identifier.urihttp://hdl.handle.net/10388/etd-02072009-093757en_US
dc.description.abstractWe report herein that IL-10-treated dendritic cells (DC) can be used effectively to reverse established severe asthma-like disease in a mouse model. Our lab had shown previously that allergen-presenting splenic CD8¦Á+ DCs could ¡Ö50% reduce airway hyper responsiveness (AHR), eosinophilia, and Th2 responses in asthma-phenotype mice, but only marginally reduce IgE/IgG1 levels. We now show that bone marrow-derived DCs that have been differentiated in the presence of IL-10 (DCIL-10) are effective in reversing the asthma phenotype. Co-culture of DCIL-10 with T memory (TM) cells from asthma-phenotype mice was associated with lack of Th2 responses, and this was partially reversed by IL-2. Immunostimulatory DC activated these Th2 cells. In vivo, delivery of allergen-pulsed DCIL-10, either into the airway or intraperitoneally abrogated AHR from weeks 3-10 post-treatment, and ameliorated lung eosinophilia and Th2 (IL-4, -5, -9, & -13, IgE) responses, as well as circulating allergen-specific IgE responses for at least 32 weeks following treatment. Repeated OVADCIL-10 treatments kept AHR normalized for 8 weeks as well as Th2 responses significantly low. In vivo, delivery of anti-IL-10R, but not anti-TGF-¦Â from day 12-21 after treatment had moderate effects on DCIL-10-driven tolerance, but 1-methyl tryptophan (inhibitor of indoleamine-2,3-dioxygenase) treatment had significant effects on Th2 responses. The mechanisms mediating tolerance in vivo are likely complex, but we speculate that infectious tolerance sustains this regulatory activity during the 32-week period in which we have observed tolerance to be in place.en_US
dc.language.isoen_USen_US
dc.subjectImmunomodulationen_US
dc.subjectTh2 responsesen_US
dc.subjectAirway Hyperresponsivenessen_US
dc.subjectAsthmaen_US
dc.subjectDendritic cellsen_US
dc.subjectregulatory T cellsen_US
dc.subjectInterleukin-10en_US
dc.titleTherapeutic immunomodulation of allergic lung disease using regulatory dendritic cells in a mouse model of asthmaen_US
thesis.degree.departmentVeterinary Microbiologyen_US
thesis.degree.disciplineVeterinary Microbiologyen_US
thesis.degree.grantorUniversity of Saskatchewanen_US
thesis.degree.levelDoctoralen_US
thesis.degree.nameDoctor of Philosophy (Ph.D.)en_US
dc.type.materialtexten_US
dc.type.genreThesisen_US


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