Intranasal immunization with a dominant T-cell epitope peptide of a major allergen of olive pollen prevents mice from sensitization to the whole allergen.
Mucosal tolerance induction with vaccines based on peptides representing T-cell epitopes of allergens is a promising way for treating allergic diseases. Ole e 1 is the main allergen of olive pollen, which is an important cause of allergy in Mediterranean countries. The aim of this study was to evaluate the ability of the peptide T109-K130 containing a dominant T-cell epitope of Ole e 1, to modulate the allergen-specific immune response in a prophylactic mouse model. Mice were intranasally treated with the peptide 1 week prior to sensitization with Ole e 1. Blood, lungs and spleens were collected and analysed for immune response. Intranasal pretreatment of mice with the peptide led to suppress serum specific IgE, IgG1 and IgG2a antibody levels, and markedly reduced proliferative T-cell response and Th2-cytokine production, but increased IFN-gamma secretion in spleen cell cultures. Increased mRNA IL-10 levels were observed in lungs from pretreated mice. Pathologic alterations of the lung associated with airway inflammation (peribronchial/perivascular infiltrates, eosinophilia and mucus production) were significantly suppressed after pretreatment. Similar results were obtained when mice were sensitized 10 weeks after treatment. Our results demonstrate that intranasal administration of a single T-cell peptide protects mice against subsequent sensitization to the allergen, possibly via IFN-gamma and IL-10. This study emphasizes the usefulness of nasal peptide T-based vaccines against allergy.
Departamento de Bioquímica y Biología Molecular, Facultad de Química, Universidad Complutense, 28040 Madrid, Spain.
Eva G
EG
Marazuela
Rosalía
R
Rodríguez
Héctor
H
Fernández-García
M Soledad
MS
García
Mayte
M
Villalba
Eva
E
Batanero
D000281:Administration, Intranasal; D000485:Allergens / Q000008:administration & dosage* / Q000494:pharmacology; D000818:Animals; D052179:Antigens, Plant; D049109:Cell Proliferation / Q000187:drug effects; D018984:Epitopes, T-Lymphocyte / Q000008:administration & dosage* / Q000494:pharmacology; D005260:Female; D005786:Gene Expression Regulation / Q000187:drug effects; D006801:Humans; D006967:Hypersensitivity / Q000517:prevention & control*; D007108:Immune Tolerance / Q000187:drug effects; D007114:Immunization; D007073:Immunoglobulin E / Q000276:immunology; D007249:Inflammation; D007371:Interferon-gamma / Q000096:biosynthesis; D016753:Interleukin-10 / Q000235:genetics / Q000378:metabolism; D008168:Lung / Q000187:drug effects / Q000378:metabolism; D051379:Mice; D008807:Mice, Inbred BALB C; D010455:Peptides / Q000008:administration & dosage* / Q000494:pharmacology; D010940:Plant Proteins / Q000008:administration & dosage* / Q000494:pharmacology; D011058:Pollen / Q000737:chemistry*; D012137:Respiratory System / Q000187:drug effects / Q000473:pathology; D013997:Time Factors; D016212:Transforming Growth Factor beta / Q000235:genetics / Q000378:metabolism
D000485:Allergens; D052179:Antigens, Plant; D018984:Epitopes, T-Lymphocyte; C081946:Ole e I protein, Olea europaea; D010455:Peptides; D010940:Plant Proteins; D016212:Transforming Growth Factor beta; D016753:Interleukin-10; D007073:Immunoglobulin E; D007371:Interferon-gamma