The interactions of tolerogenic dendritic cells, induced regulatory T cells and antigen-specific IgG1-secreting plasma cells in asthma
type: CreativeWork
description: Allergic asthma is a chronic inflammatory airway disease that is dominated by Th2 immune responses, with accumulation of eosinophils, IgE and IgG1 production, and airway hyperresponsiveness. We reported previously that treatment of OVA-asthmatic mice with allergen-presenting IL-10-differentiated dendritic cells (DC) (DC10) leads to progressive and long-lasting full-spectrum asthma tolerance. However, little has been done in investigating a role for antigen-specific B cells in DC10-induced tolerance. In this study, we characterized the surface markers of DC10 and found that these cells expressed lower levels of CD40, CD80, MHC II, PD-L1 and PD-L2 relative to immunostimulatory LPS-differentiated DCs (DCLPS). Co-culturing DC10 or DC10-induced regulatory T cells (iTreg) with CD4+ Th2 effector T cells from asthmatic mice led to a marked suppression of DCLPS-induced T effector cell proliferation. Moreover, DC10 treatment of asthma phenotype mice down-regulated airway eosinophilic inflammation as determined 48 h after a recall allergen challenge, and reduced pulmonary parenchymal tissue OVA-specific IgG1-secreting (OVA-IgG1) plasma cell numbers. The number of lung OVA-specific IgG1 plasma cells decreased by 46.7% over a 2 week period in the absence of repeated allergen challenge, while the numbers of bone marrow OVA-specific IgG1 plasma cells stayed relatively stable over a 6 week period, as determined 48 h after a single allergen challenge of asthmatic mice. DC10 treatment had a significant impact on the serum of IgG1/IgE response. To address the question of how DC10 influence OVA-IgG1 plasma cells responses, we co-cultured enzymatically-dispersed lung total cells from asthmatic mice with or without DC10, and found that the DC10 significantly suppressed OVA-IgG1 plasma cell antibody production. To determine whether DC10 required input from T cells to accomplish this, we co-cultured CD4 T cell-depleted, B cell-enriched populations from the lungs of asthmatic mice with or w…
abstract: Allergic asthma is a chronic inflammatory airway disease that is dominated by Th2 immune responses, with accumulation of eosinophils, IgE and IgG1 production, and airway hyperresponsiveness. We reported previously that treatment of OVA-asthmatic mice with allergen-presenting IL-10-differentiated dendritic cells (DC) (DC10) leads to progressive and long-lasting full-spectrum asthma tolerance. However, little has been done in investigating a role for antigen-specific B cells in DC10-induced tolerance. In this study, we characterized the surface markers of DC10 and found that these cells expressed lower levels of CD40, CD80, MHC II, PD-L1 and PD-L2 relative to immunostimulatory LPS-differentiated DCs (DCLPS). Co-culturing DC10 or DC10-induced regulatory T cells (iTreg) with CD4+ Th2 effector T cells from asthmatic mice led to a marked suppression of DCLPS-induced T effector cell proliferation. Moreover, DC10 treatment of asthma phenotype mice down-regulated airway eosinophilic inflammation as determined 48 h after a recall allergen challenge, and reduced pulmonary parenchymal tissue OVA-specific IgG1-secreting (OVA-IgG1) plasma cell numbers. The number of lung OVA-specific IgG1 plasma cells decreased by 46.7% over a 2 week period in the absence of repeated allergen challenge, while the numbers of bone marrow OVA-specific IgG1 plasma cells stayed relatively stable over a 6 week period, as determined 48 h after a single allergen challenge of asthmatic mice. DC10 treatment had a significant impact on the serum of IgG1/IgE response. To address the question of how DC10 influence OVA-IgG1 plasma cells responses, we co-cultured enzymatically-dispersed lung total cells from asthmatic mice with or without DC10, and found that the DC10 significantly suppressed OVA-IgG1 plasma cell antibody production. To determine whether DC10 required input from T cells to accomplish this, we co-cultured CD4 T cell-depleted, B cell-enriched populations from the lungs of asthmatic mice with or w…
author: Ma, Yanna
language: eng
keywords: Tolerogenic dendritic cells, Induced regulatory T cells, Antigen-specific IgG1-secreting plasma cells, Asthma
date published: 2015-09-08
date modified: 2026-07-24T04:26:57Z
provider: University of Saskatchewan
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: University of Saskatchewan

PropertyValue
property ID: Handle
value: https://hdl.handle.net/10388/ETD-2015-06-2123