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Migración de esporozoitos de Plasmodium a través de las células antes de la infección
M M Mota1, G Pradel, J P Vanderberg
1Department of Pathology, New York University School of Medicine, 341 East 25 Street, New York, NY 10010, USA.
Science (New York, N.Y.)
|January 6, 2001
Resumen
Los parásitos de la malaria (Plasmodium sporozoites) invaden las células rompiendo la membrana plasmática, no formando una vacuola. Esta entrada única y el recorrido celular es crucial para el desarrollo del parásito y para completar el ciclo de vida de la malaria.
Área de la Ciencia:
- Biología celular Biología celular.
- Parasitología Parasitología.
- Enfermedades infecciosas Enfermedades infecciosas.
Sus antecedentes:
- Los patógenos intracelulares suelen entrar en las células del huésped a través de la formación de vacuolas.
- Los esporozoitos de Plasmodium, la etapa infecciosa del parásito de la malaria, requieren una entrada eficiente en las células para la infección.
- Comprender los mecanismos de invasión de Plasmodium sporozoite es clave para desarrollar estrategias de control de la malaria.
Objetivo del estudio:
- Para investigar el mecanismo de entrada celular alternativo de los esporozoitos de Plasmodium.
- Para dilucidar el proceso de invasión de esporozoitos más allá de la interacción inicial de la célula huésped.
- Determinar el papel del recorrido celular en el ciclo de vida del parásito de la malaria.
Principales métodos:
- Microscopía de imágenes en vivo para observar las interacciones de Plasmodium sporozoite con las células huésped.
- Análisis de la integridad de la membrana plasmática de la célula huésped durante la entrada de esporozoitos.
- Seguimiento del movimiento de esporozoitos dentro de los tejidos del huésped.
Principales resultados:
- Los esporozoitos de Plasmodium rompen la membrana plasmática de la célula huésped, que luego se repara rápidamente.
- Este mecanismo de entrada evita la formación de vacuola convencional, lo que permite la liberación inmediata de parásitos en el citosol.
- Los esporózoitos migran a través de múltiples células huésped antes de establecer la infección en los hepatocitos a través de una vacuola parasitofórica.
Conclusiones:
- Los esporozoitos de Plasmodium utilizan una vía única de invasión no vacuolar que implica la ruptura y reparación de la membrana.
- La travesía citosólica a través de múltiples células huésped es esencial para el desarrollo y la infectividad de Plasmodium sporozoite.
- Este comportamiento migratorio es crítico para completar el ciclo de vida del parásito de la malaria en los mamíferos huéspedes.
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