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Efectos de la recombinación en la evolución de la resistencia a múltiples fármacos en la malaria por Plasmodium

Kien Trung Tran¹, Tran Dang Nguyen¹, Daniel B Weissman²

¹Institute for Genomics and Evolutionary Medicine, Department of Biology, Temple University, Philadelphia, Pennsylvania, United States of America.

PLoS computational biology

|August 25, 2025

Resumen

La recombinación puede acelerar o obstaculizar la propagación de la resistencia a los medicamentos en la malaria. Los nuevos modelos muestran la mejor resistencia tardía a las terapias de triple combinación de artemisinina (ACT), seguidas de terapias múltiples de primera línea (MFT).

Área de la Ciencia:

Biología evolutiva
Parasitología
Modelado matemático

Sus antecedentes:

El efecto de la recombinación en la evolución de la resistencia a múltiples fármacos (MDR) es incierto.
Comprender la recombinación es crucial para las estrategias de control de enfermedades infecciosas.

Objetivo del estudio:

Investigar el papel de la recombinación en la aparición de Plasmodium falciparum multirresistente (MDR).
Comparar la eficacia de las diferentes estrategias de gestión de la resistencia a los medicamentos para la malaria.

Principales métodos:

Desarrolló un nuevo modelo de transmisión de la malaria basado en el individuo con 25 loci resistentes a los medicamentos.
Incorporó picaduras individuales de mosquitos y alimentación interrumpida para modelar eventos de recombinación.
Simuló varias estrategias de manejo de la resistencia a los medicamentos durante un período de 15 años.

Principales resultados:

El 80-97% de los genotipos de falciparum recombinantes MDR provienen de mordeduras únicas en huéspedes con infecciones multiclonales.
Las terapias triples de combinación con artemisinina (ACT, por sus siglas en inglés) mostraron la mayor reducción en el fracaso del tratamiento y el retraso más largo hasta la resistencia al 1% de la artemisinina.
Las terapias múltiples de primera línea (MFT) fueron las segundas mejores, generando más diversidad genotípica pero una aparición más lenta de MDR que el ciclo ACT.

Conclusiones:

La recombinación juega un papel importante en la evolución de la resistencia a los fármacos en Plasmodium falciparum.
Las estrategias Triple ACT son las más eficaces para retrasar la resistencia a la artemisinina.
Las estrategias MFT ofrecen un equilibrio entre el retraso de la resistencia y la diversidad del genotipo.

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