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La maduración de Plasmodium falciparum elimina la deformabilidad fisiológica de los glóbulos rojos
Science (New York, N.Y.)
|January 27, 1984
Resumen
La infección por Plasmodium falciparum afecta la deformabilidad de los glóbulos rojos, especialmente en las primeras etapas. Esta flexibilidad reducida ayuda al bazo a eliminar las células infectadas de la circulación.
Área de la Ciencia:
- Hematología Hematología.
- Parasitología Parasitología.
- La Biofísica Celular es una Biofísica Celular.
Sus antecedentes:
- Los glóbulos rojos (glóbulos rojos) normalmente se deforman para navegar por los capilares estrechos y el bazo.
- La infección por Plasmodium falciparum altera las propiedades de los glóbulos rojos, lo que afecta la gravedad y el aclaramiento de la enfermedad.
Objetivo del estudio:
- Investigar cómo la infección por Plasmodium falciparum y la maduración del parásito afectan la deformabilidad de los glóbulos rojos bajo estrés de cizallamiento.
- Para aclarar los mecanismos biofísicos subyacentes a la eliminación de glóbulos rojos infectados por el bazo.
Principales métodos:
- Utilizó un reoscopio para aplicar estrés de cizallamiento de fluido controlado a glóbulos rojos infectados in vitro.
- Examinó la deformabilidad y la recuperación de la forma de los glóbulos rojos en células infectadas con diferentes etapas eritrocíticas de Plasmodium falciparum.
Principales resultados:
- Los glóbulos rojos con parásitos en etapa temprana (formas de anillo) mostraron una deformabilidad significativamente deteriorada y una recuperación de la forma más lenta.
- Los glóbulos rojos con parásitos maduros (trofozoítos, esquizontes) no se deformaron bajo las tensiones de cizallamiento probadas.
- La infección por parásitos altera las propiedades mecánicas de los glóbulos rojos, lo que afecta su capacidad para deformarse.
Conclusiones:
- El deterioro de la deformabilidad de los glóbulos rojos en la infección temprana por Plasmodium falciparum proporciona un mecanismo para el aclaramiento del bazo.
- La mecánica alterada de los glóbulos rojos contribuye a la eliminación de las células parasitadas, ayudando en la defensa del huésped.
- Comprender estos cambios es crucial para comprender la patogénesis de la malaria y la evasión inmune.
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