Prophylactic and Therapeutic Potential of Asp f1 Epitopes in Naive and Sensitized BALB/c Mice
Immune Network
;
: 179-191, 2009.
Article
in English
| WPRIM
| ID: wpr-71517
ABSTRACT
BACKGROUND:
The present study examines a hypothesis that short allergen-derived peptides may shift an Aspergillus fumigatus (Afu-) specific TH2 response towards a protective TH1. Five overlapping peptides (P1-P5) derived from Asp f1, a major allergen/antigen of Afu, were evaluated for prophylactic or therapeutic efficacy in BALB/c mice.METHODS:
To evaluate the prophylactic efficacy, peptides were intranasally administered to naive mice and challenged with Afu-allergens/antigens. For evaluation of therapeutic efficacy, the mice were sensitized with Afu-allergens/antigens followed by intranasal administration of peptides. The groups were compared for the levels of Afu-specific antibodies in sera and splenic cytokines evaluated by ELISA. Eosinophil peroxidase activity was examined in the lung cell suspensions and lung inflammation was assessed by histopathogy.RESULTS:
Peptides P1-, P2- and P3 decreased Afu-specific IgE (84.5~98.9%) and IgG antibodies (45.7~71.6%) in comparison with Afu-sensitized mice prophylactically. P1- and P2-treated ABPA mice showed decline in Afu-specific IgE (76.4~88%) and IgG antibodies (15~54%). Increased IgG2a/IgG1 and IFN-gamma/IL-4 ratios were observed. P1-P3 prophylactically and P1 therapeutically decreased IL-5 levels and eosinophil peroxidase activity. P1 decreased inflammatory cells' infiltration in lung tissue comparable to non-challenged control.CONCLUSION:
Asp f1-derived peptide P1, prophylactically and therapeutically administered to Balb/c mice, is effective in regulating allergic response to allergens/antigens of Afu, and may be explored for immunotherapy of allergic aspergillosis in humans.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Peptides
/
Pneumonia
/
Aspergillosis
/
Aspergillosis, Allergic Bronchopulmonary
/
Aspergillus fumigatus
/
Suspensions
/
Immunoglobulin E
/
Immunoglobulin G
/
Administration, Intranasal
/
Enzyme-Linked Immunosorbent Assay
Limits:
Animals
/
Humans
Language:
English
Journal:
Immune Network
Year:
2009
Type:
Article
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