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La administración de este fármaco, que es una proteína mutante de IL-4, previno la eosinofilia de las vías aéreas inducida por antígenos, así como la hipersensibilidad de las vías aéreas.
Los autores explican que la IL-4 y la IL-13 desempeñan un papel importante en el asma alérgica y que los agentes que bloquean el complejo de las dos interleuquinas pueden proporcionar beneficios clínicos interesantes.