Conjunctival provocation with airborne allergen in patients with atopic keratoconjunctivitis
| Autor: | Guro Gafvelin, E. Nivenius, Per Montan, Marianne van Hage, I. Ploeg |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Chemosis
Adult Male medicine.medical_specialty Eye disease Immunology Provocation test Keratoconjunctivitis medicine.disease_cause Immunoglobulin E Airborne allergen Allergen Air Pollution Immunology and Allergy Medicine Humans Clinical significance Betula Aged Conjunctivitis Allergic Inflammation biology business.industry Atopic keratoconjunctivitis Allergens Middle Aged medicine.disease Dermatology Phleum Tears biology.protein Cytokines Pollen Female medicine.symptom business Conjunctiva |
| Zdroj: | Clinical and experimental allergy : journal of the British Society for Allergy and Clinical Immunology. 42(1) |
| ISSN: | 1365-2222 |
| Popis: | SummaryBackground Atopic keratoconjunctivitis (AKC) is a chronic eye disease with periods of exacerbations. Many patients experience no obvious seasonal variation, although a majority of patients are allergic to common airborne allergens. Objective To investigate the allergic reaction, to conjunctival provocation with airborne allergens, in patients with AKC. Methods Eleven patients with AKC and birch and/or grass pollen allergy participated in the study, which was performed outside the pollen season. Five patients with seasonal allergic conjunctivitis (SAC) and five healthy subjects were included for validation purposes. The challenge was performed in one eye with the allergen, to which the patient was reactive, and with dilution buffer in the other eye. Signs and symptoms from both eyes were graded at baseline and at 10 min, 8 and 48 h after provocation. Tear fluid was collected from both eyes for cytokine analyses at baseline and at 8 and 48 h. Results A significant change in clinical symptoms and signs, (redness and chemosis) was evident 10 min after provocation compared with baseline (P = 0.005) and compared with the unprovoked eye (P = 0.005) in AKC subjects. These parameters were normalized after 8 and 48 h. A significant increase for IFN-γ (P = 0.021) and IL-6 (P = 0.015), and a near significant increase for IL-10 (P = 0.066) were seen in the tear fluid of the challenged eye at 48 h after provocation vs. baseline and vs. the control eye for IFN-γ (P = 0.005), IL-6 (P = 0.028) and IL-10 (P = 0.008) in AKC subjects. Conclusion and Clinical Relevance In this single dose allergen provocation study, AKC patients responded with a typical IgE-mediated allergic reaction. An increase in cytokines at 48 h after the challenge was demonstrated and might, with further studies, give us a better understanding of the nature of inflammation in AKC. |
| Databáze: | OpenAIRE |
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