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Vol. 33. Issue 1.
Pages 6-11 (January 1997)
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Vol. 33. Issue 1.
Pages 6-11 (January 1997)
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Niveles séricos de proteína catiónica del eosinófílo en pacientes con rinitis alérgica. Evolución tras tratamiento con corticoides*
Eosinophilic cationic protein serum levels in patients with allergic rhinitis. Evolution after treatment of corticoids
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F.J. Álvarez Gutiérrez1, F. Valenzuela Mateos, J.A. Rodríguez Portal, R. Sánchez Gil, E. Tabernero Huguet, J. Castillo Gómez
Servicio de Neumología. Hospital Universitario Virgen del Rocío. Sevilla
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Analizamos los niveles séricos de proteína catiónica del eosinófílo (ECP) y su evolución tras tratamiento con corticoides vía tópica nasal.

Se estudiaron 53 personas sanas (grupo control) y 21 pacientes, diagnosticados de rinitis alérgica (RA) con o sin asma bronquial, que presentaban al ser incluidos sintomatología exclusivamente rinítica. Se realizaron tests cutáneos por el método de Prick, espirometría forzada, prueba de provocación con metacolina, cuantifícación de inmunoglobulina E, hemograma con recuento de eosinófilos y determinamos los niveles séricos de ECP por la técnica del fluoroinmunoanálisis.

Los pacientes recibieron budesonida tópica nasal a dosis de 200μg/24h. Se efectuaron determinaciones de ECP y cuantifícación de eosinófílos, antes del inicio del tratamiento (basal) y durante su realización (a los 21 y 60 días).

Encontramos diferencias significativas (p<0,01) entre los niveles séricos de ECP del grupo control (9,34±5,76) y de pacientes (determinación basal=16,47±15,28). Estos valores descendieron significativamente a los 21-60 días de tratamiento, respecto a los basales, aunque no entre los 21 y 60 días. No se apreció un descenso significativo en el número de eosinófílos. Hallamos una correlación entre el número de eosinófílos y los niveles de ECP basales (r=0,53), y no tras el tratamiento (r=0,25). Ningún paciente presentó sintoma- tología bronquial durante el estudio.

Concluimos que encontramos diferencias significativas en los niveles séricos de ECP entre el grupo control y de pacientes riníticos. Observamos descensos significativos de estos niveles, posiblemente debido al tratamiento con corticoides por vía nasal, mientras que no se halló una disminución del número de eosinófílos. Por todo ello, los niveles de ECP podrían utilizarse para monitorizar la actividad inflamatoria en pacientes con rinitis alérgica.

Palabras clave:
Rinitis alérgica
Eosinófílo
Proteína catiónica del eosinófílo

We analyze changes in eosinophilic cationic protein (ECP) serum levels after treatment with intranasal corticoids.

Fifty-three healthy individuals (control group) and 21 patients diagnosed of allergic rhinitis, with or without bronchial asthma, were enrolled at a time when they had only nasal symptoms. Data were collected from skin Prick tests, forced spirometry, methacholine challenge, and complete blood workups, incluiding IgE measurement, eosinophil counts and ECP serum levels determined by immunofluorescence.

The patients received intranasal budesonide at a dose of 200μg/24h. ECP levels and eosinophil counts were determined before (baseline levels) and during treatment (on days 21 and 60).

We found significant differences (p<0.01) in baseline ECP levels of the Controls (9.34±5.76) and patients (16.47±15.28). These values were significantly lower than baseline 21 and 60 days after treatment, although the changes be- tween days 21 and 60 were not significant. Eosinophil counts did not fall significantly. We also found that eosinophil counts and ECP levels were correlated (r=0.53) at baseline but not after treatment (r=0.25). No patient experienced bronchial symptoms during the study.

We conclude that ECP serum levels in patients with symptoms of rhinitis are significantly higher than levels in non symptomatic individuals. These levels fall significantly, possibly due to intranasal corticoid treatment, although eosinophil counts remain constant. ECP levels can therefore be used to monitor inflammatory activity in patients with allergic rhinitis.

Key words:
Allergic rhinitis
Eosinophil
Eosinophilic cationic protein
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Trabajo parcialmente subvencionado por la Beca SEPAR 1994

Copyright © 1997. Sociedad Española de Neumología y Cirugía Torácica
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