La resistencia a la cloroquina en los parásitos de la malaria Plasmodium falciparum conferida por las mutaciones del pfcrt
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Updated: Jul 12, 2026

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Selection of Plasmodium falciparum Parasites for Cytoadhesion to Human Brain Endothelial Cells
Published on: January 3, 2012
Amar Bir Singh Sidhu1, Dominik Verdier-Pinard, David A Fidock
1Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY 10461, USA.
Resumen
La resistencia a la cloroquina en la malaria de Plasmodium falciparum está relacionada con mutaciones en el gen pfcrt. Estas mutaciones confirman una causa directa, ayudando al desarrollo de nuevos tratamientos para la malaria.
Área de la Ciencia:
- Genética La genética.
- Malariología Malariología.
- Biología Molecular Biología Molecular
Sus antecedentes:
- La resistencia a la cloroquina en Plasmodium falciparum es un importante problema de salud mundial.
- Estudios anteriores sugirieron un vínculo entre las mutaciones del gen pfcrt y la resistencia a la cloroquina.
- Una relación causal definitiva y la base genética seguían sin estar claras.
Objetivo del estudio:
- Proporcionar evidencia concluyente del papel causal de las mutaciones del gen pfcrt en la resistencia a la cloroquina.
- Investigar el impacto de las mutaciones de pfcrt en la acumulación de fármacos y la reversibilidad.
- Evaluar la eficacia de los antipalúdicos alternativos contra los parásitos mutantes del pfcrt.
Principales métodos:
- Análisis de los haplotipos del gen pfcrt de diversos orígenes geográficos (asiático, africano, sudamericano).
- Evaluación fenotípica de la resistencia a la cloroquina, la reversibilidad del verapamil y la acumulación de fármacos en cepas mutantes de pfcrt.
- Prueba de la susceptibilidad de los parásitos mutantes de pfcrt a la artemisinina, la quinina y la amodiaquina.
Principales resultados:
- Los haplotipos mutantes de pfcrt confieren directamente resistencia a la cloroquina.
- La resistencia se caracteriza por la reversibilidad del verapamil y la reducción de la acumulación de cloroquina.
- Las mutaciones pfcrt aumentan la susceptibilidad a la artemisinina y la quinina, con un impacto mínimo en la amodiaquina.
Conclusiones:
- El gen pfcrt es un determinante clave de la resistencia a la cloroquina en el Plasmodium falciparum.
- Los antipalúdicos alternativos como la artemisinina y la quinina son prometedores para el tratamiento de la malaria resistente a la cloroquina.
- Comprender las mutaciones pfcrt es crucial para las estrategias de control de la malaria y el desarrollo de fármacos.
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