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El receptor IgE de alta afinidad en los eosinófilos está involucrado en la defensa contra los parásitos
A S Gounni1, B Lamkhioued, K Ochiai
1Centre d'Immunologie et de Biologie Parasitaire, Unite Mixte INSERM U167-CNRS624, Institut Pasteur, Lille, France.
Nature
|January 13, 1994
Resumen
Los eosinófilos y la inmunoglobulina E (IgE) combaten las infecciones parasitarias. El receptor de IgE de alta afinidad (Fc epsilon RI) en los eosinófilos es crucial para luchar contra los parásitos Schistosoma mansoni.
Área de la Ciencia:
- Inmunología Inmunología.
- Parasitología Parasitología.
- Biología celular Biología celular.
Sus antecedentes:
- Las infecciones parasitarias se correlacionan con frecuencia con la eosinophilia y los niveles elevados de inmunoglobulina E (IgE).
- Se supone que los eosinófilos y las IgE colaboran en la respuesta inmune contra los parásitos.
- Investigaciones anteriores implicaron al receptor de IgE de baja afinidad (Fc epsilon RII/CD23) en la activación de los eosinófilos.
Objetivo del estudio:
- Investigar la presencia y el papel del receptor de IgE de alta afinidad (Fc epsilon RI) en los eosinófilos.
- Para determinar si Fc epsilon RI en los eosinófilos contribuye a la defensa inmune contra las infecciones parasitarias, específicamente Schistosoma mansoni.
Principales métodos:
- Investigó la expresión de Fc epsilon RI en los eosinófilos de pacientes hipereosinófilos.
- Se evaluó la participación de Fc epsilon RI en la degranulación de los eosinófilos.
- Se evaluó la participación de los eosinófilos que expresan Fc epsilon RI en la citotoxicidad contra las larvas de Schistosoma mansoni in vitro.
Principales resultados:
- Fc epsilon RI se expresa en los eosinófilos de pacientes hipereosinófilos.
- La expresión de Fc epsilon RI en los eosinófilos está relacionada con la degranulación de los eosinófilos.
- Los eosinófilos que expresan Fc epsilon RI demuestran citotoxicidad contra las larvas de Schistosoma mansoni.
Conclusiones:
- El receptor de IgE de alta afinidad (Fc epsilon RI) está presente en los eosinófilos y juega un papel importante en su función.
- Fc epsilon RI en los eosinófilos contribuye a la defensa inmune contra las infecciones parasitarias como el Schistosoma mansoni.
- Este hallazgo pone de relieve un mecanismo crítico en la respuesta inmune que involucra a los eosinófilos y las IgE.
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