Antigen-Pulsed Bone Marrow–Derived and Pulmonary Dendritic Cells Promote Th2 Cell Responses and Immunopathology in Lungs during the Pathogenesis of Murine Mycoplasma Pneumonia
| Autor: | Mark Pulse, Trenton R. Schoeb, Nicole Dobbs, Lisa M. Hodge, Jerry W. Simecka, Xia Zhou |
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| Rok vydání: | 2014 |
| Předmět: |
T cell
Immunology Bone Marrow Cells Mice SCID Biology medicine.disease_cause Article Mycoplasma pulmonis Mice Th2 Cells Immune system Immunopathology Pneumonia Mycoplasma Intubation Intratracheal medicine Animals Immunology and Allergy Lung Administration Intranasal Antigens Bacterial Mice Inbred BALB C Respiratory disease Dendritic Cells Mycoplasma Dendritic cell medicine.disease medicine.anatomical_structure Mycoplasma pneumonia Female |
| Zdroj: | The Journal of Immunology. 193:1353-1363 |
| ISSN: | 1550-6606 0022-1767 |
| DOI: | 10.4049/jimmunol.1301772 |
| Popis: | Mycoplasmas are a common cause of pneumonia in humans and animals, and attempts to create vaccines have not only failed to generate protective host responses, but they have exacerbated the disease. Mycoplasma pulmonis causes a chronic inflammatory lung disease resulting from a persistent infection, similar to other mycoplasma respiratory diseases. Using this model, Th1 subsets promote resistance to mycoplasma disease and infection, whereas Th2 responses contribute to immunopathology. The purpose of the present study was to evaluate the capacity of cytokine-differentiated dendritic cell (DC) populations to influence the generation of protective and/or pathologic immune responses during M. pulmonis respiratory disease in BALB/c mice. We hypothesized that intratracheal inoculation of mycoplasma Ag–pulsed bone marrow–derived DCs could result in the generation of protective T cell responses during mycoplasma infection. However, intratracheal inoculation (priming) of mice with Ag-pulsed DCs resulted in enhanced pathology in the recipient mice when challenged with mycoplasma. Inoculation of immunodeficient SCID mice with Ag-pulsed DCs demonstrated that this effect was dependent on lymphocyte responses. Similar results were observed when mice were primed with Ag-pulsed pulmonary, but not splenic, DCs. Lymphocytes generated in uninfected mice after the transfer of either Ag-pulsed bone marrow–derived DCs or pulmonary DCs were shown to be IL-13+ Th2 cells, known to be associated with immunopathology. Thus, resident pulmonary DCs most likely promote the development of immunopathology in mycoplasma disease through the generation of mycoplasma-specific Th2 responses. Vaccination strategies that disrupt or bypass this process could potentially result in a more effective vaccination. |
| Databáze: | OpenAIRE |
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