Cellular and humoral immune responses during intrathoracic paracoccidioidomycosis in BALB/c mice.
Paracoccidioidomycosis is a chronic infection that primarily affects the lungs. Here we investigated cellular and humoral immune responses after intrathoracic Paracoccidioidesbrasiliensis infection in BALB/c mice. P. brasiliensis-colony-forming units (CFUs), fungal DNA and granulomas in lungs increased progressively, peaking at day 90 postinfection (p.i.). IFN-γ production was highest on day 15 p.i., declining thereafter. The kinetics of the NO production was similar to that described for IFN-γ. In contrast, IL-10 increased from day 45 p.i. reaching a peak at day 90. Levels of serum IgG1 were higher than IgG2a between days 30 and 90 p.i. 30% of mice died by day 90 p.i. These data indicate that infection with P. brasiliensis by the intrathoracic route shows high IFN-γ and NO production at day 15 p.i., unable to control multiplication of fungi, which appears to be associated with a progressive increase in IL-10 and in the number and complexity of granulomas.
| Main Authors: | , , , , , , , |
|---|---|
| Other Authors: | |
| Format: | Artigo de periódico biblioteca |
| Language: | Ingles English |
| Published: |
2010-04-20
|
| Subjects: | IFN-y, IL-10, Antibody response, Intrathoracic route, Paracoccidioides brasiliensis, |
| Online Access: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/697051 https://doi.org/10.1016/j.cimid.2008.07.006 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Paracoccidioidomycosis is a chronic infection that primarily affects the lungs. Here we investigated cellular and humoral immune responses after intrathoracic Paracoccidioidesbrasiliensis infection in BALB/c mice. P. brasiliensis-colony-forming units (CFUs), fungal DNA and granulomas in lungs increased progressively, peaking at day 90 postinfection (p.i.). IFN-γ production was highest on day 15 p.i., declining thereafter. The kinetics of the NO production was similar to that described for IFN-γ. In contrast, IL-10 increased from day 45 p.i. reaching a peak at day 90. Levels of serum IgG1 were higher than IgG2a between days 30 and 90 p.i. 30% of mice died by day 90 p.i. These data indicate that infection with P. brasiliensis by the intrathoracic route shows high IFN-γ and NO production at day 15 p.i., unable to control multiplication of fungi, which appears to be associated with a progressive increase in IL-10 and in the number and complexity of granulomas. |
|---|