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Establishment of Larval Zebrafish as an Animal Model to Investigate Trypanosoma cruzi Motility In Vivo
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El Trypanosoma cruzi invade una célula epitelial de mamífero de una manera polarizada
S Schenkman1, N W Andrews, V Nussenzweig
1Department of Pathology, New York University Medical Center, New York 10016.
Cell
|October 7, 1988
Resumen
La polaridad celular afecta a la invasión de parásitos. Trypanosoma cruzi infecta preferentemente las células huésped a través de dominios basolaterales, con células menos polarizadas que muestran tasas de infección más altas.
Área de la Ciencia:
- Biología celular Biología celular.
- Parasitología Parasitología.
- Enfermedades infecciosas Enfermedades infecciosas.
Sus antecedentes:
- La polaridad de la célula huésped es un factor crítico en la entrada de patógenos y la dinámica de infección.
- Trypanosoma cruzi, el agente causante de la enfermedad de Chagas, exhibe complejas interacciones huésped-parásito.
- Comprender los mecanismos de entrada de parásitos es crucial para desarrollar estrategias efectivas de control de enfermedades.
Objetivo del estudio:
- Para investigar el papel de la polaridad de la célula huésped en el proceso de infección por Trypanosoma cruzi.
- Para determinar los puntos de entrada específicos de Trypanosoma cruzi en las células epiteliales polarizadas.
Principales métodos:
- Utilizó células epiteliales del riñón canino Madin-Darby (MDCK), un modelo para las células polarizadas.
- Empleó una sonda de ADN para la evaluación cuantitativa de la infección por parásitos.
- Microscopía electrónica de barrido aplicada para visualizar los sitios de entrada de parásitos.
Principales resultados:
- Las células MDCK confluentes y polarizadas mostraron una entrada preferente de Trypanosoma cruzi a través de dominios basolaterales.
- Las células MDCK menos polarizadas y escasamente recubiertas exhibieron una mayor susceptibilidad a la infección.
- La microscopía electrónica de barrido reveló que aproximadamente el 92% de los parásitos entró en los bordes celulares.
Conclusiones:
- La polaridad de la célula huésped influye significativamente en la invasión de Trypanosoma cruzi.
- El dominio basolateral es un sitio de entrada preferido para las etapas metacíclicas y tripomastigote de Trypanosoma cruzi.
- La entrada de parásitos está regulada espacialmente, con una alta preferencia por los bordes celulares en células polarizadas.
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