Efficacy of sublingual specific immunotherapy in Cupressaceae allergy using an extract of Cupressus arizonica. A double blind study
- 1 January 2001
- journal article
- clinical trial
- Published by Codon Publications in Allergologia et Immunopathologia
- Vol. 29 (6) , 238-244
- https://doi.org/10.1016/s0301-0546(01)79065-9
Abstract
Non-injective routes of immunotherapy in respiratory allergy have being proposed as an alternative to conventional immunotherapy. We carried out a study to evaluate the clinical efficacy and effects sublingual immunotherapy (SLIT) in patient with Cupressaceae pollen respiratory allergy twenty patients with Cupressaceae pollen (C. sempervirens) rhinoconjunctivitis, mild asthma or both were randomly chosen for sublingual immunotherapy (10 patients) or placebo treatment (10 patients) using a double blind placebo controlled technique. We have used an extract of Cupressus arizonica because of its better stability in solution and its cross-reactivity with Cupressus sempervirens. The patients underwent treatment for 12 months (from april 1999 to april 2000). Symptoms and drug scores as well as nasal provocation tests were recorded. The pollen counts were carried out, during all the same period we found significantly lower symptom scores (p < 0.05) and drug consumption scores (p < 0.05) in the immunotherapy group than in the placebo group, during the pollen season, after the first year of therapy. Besides threshold of allergen reactivity in nasal provocation tests was increased in the active group (p < 0.01). No untoward reactions have been observed SLIT with Cupressus arizonica (pollen extracts) produced, after one year treatment, a significant improvement of allergic symptoms and a decrease of drug consumption scores and allergen-specific nasal reactivity. SLIT with Cupressus arizonica appeared to be effective and safe in the treatment of Cupressaceae pollen respiratory allergy en alergia respiratoria se han propuesto vías no parenterales para la inmunoterapia como alternativa a la inmunoterapia convencional. Llevamos a cabo un estudio para evaluar la eficacia clínica y los efectos de la inmunoterapia sublingual (ITSL) en pacientes con alergia respiratoria debida al polen por Cupressaceae se eligió aleatoriamente a 20 pacientes con alergia al polen de Cupressus sempervirens, asociada a rinoconjuntivitis, asma leve o ambas, a inmunoterapia por vía sublingual (10 pacientes) o a placebo (10 pacientes) utilizando una técnica doble ciego, controlada con placebo. Hemos utilizado un extracto de Cupressus arizonica debido a su mejor estabilidad en solución y a su reactividad cruzada con Cupressus sempervirens. Los pacientes siguieron el tratamiento durante 12 meses desde abril de 1999 a abril de 2000. Se registraron las puntuaciones de síntomas y de consumo de fármacos al igual que los resultados de las pruebas de provocación nasal. Durante el mismo período se llevaron a cabo recuentos de polen identificamos una puntuación significativamente menor de síntomas (p < 0,05) y de consumo de fármacos (p < 0,05) en el grupo que recibió inmunoterapia que en el grupo tratado con placebo, durante la estación del polen, después del primer año de tratamiento. Además, el umbral de reactividad al alergeno en las pruebas de provocación nasal aumentó en el grupo de tratamiento activo (p < 0,01). No se observaron reacciones adversas después de un año de tratamiento, la ITSL con extractos de polen de Cupressus arizonica produjo una mejoría significativa de los síntomas de alergia y una disminución de las puntuaciones de consumo de fármacos y de la reactividad nasal específica de alergeno. La ITSL con Cupressus arizonica parece ser eficaz y segura en el tratamiento de la alergia respiratoria debida al polen de CupressaceaeKeywords
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