Resumen
Objetivo: Identificar posibles inhibidores de la enzima β-1,3-glucano sintasa de Candida albicans mediante enfoques in silico, con el objetivo de reposicionar fármacos aprobados por la FDA como una alternativa para el desarrollo de nuevos agentes antifúngicos. Métodos: El modelado por homología de la enzima se realizó basándose en la estructura de Saccharomyces cerevisiae, mostrando el 93,45% de los residuos en regiones favorables del gráfico de Ramachandran. El cribado virtual se llevó a cabo en el servidor MTiOpenScreen utilizando la biblioteca Drugs-lib, seguido de acoplamiento molecular y simulaciones de dinámica molecular de 100 ns en el software AMBER 2024. Las energías libres de unión se calcularon mediante los métodos MMGBSA y MMPBSA. Resultados: Entre los compuestos evaluados, Elbasvir presentó la energía de unión más favorable (–62,4 kcal/mol), estabilidad conformacional e interacciones consistentes con los residuos del sitio activo de la enzima, destacándose como el mejor candidato. El itraconazol también mostró buena afinidad y un posible doble mecanismo de acción, actuando tanto sobre la lanosterol 14α-desmetilasa como sobre la β-1,3-glucano sintasa. Conclusión: El estudio confirmó el potencial del reposicionamiento de fármacos como una estrategia eficaz para el descubrimiento de nuevos antifúngicos. Elbasvir se destacó como un fuerte candidato para la validación experimental y posible aplicación terapéutica contra C. albicans.
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