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Un inhibidor de la biosíntesis del colesterol bloquea la virulencia del Staphylococcus aureus
Chia-I Liu1, George Y Liu, Yongcheng Song
1Institute of Biological Chemistry, Academia Sinica, Nankang, Taipei 11529, Taiwan.
Science (New York, N.Y.)
|February 16, 2008
Resumen
Los investigadores descubrieron que el bloqueo del Staphylococcus aureus puede
Área de la Ciencia:
- Microbiología Microbiología.
- La bioquímica es la bioquímica.
- Biología Estructural Biología estructural.
Sus antecedentes:
- El Staphylococcus aureus causa infecciones significativas, siendo el SARM una amenaza importante.
- La estafiloxantina, un pigmento producido por S. aureus, mejora la resistencia bacteriana a las defensas del huésped.
- Las vías enzimáticas para la estafiloxantina comparten similitudes con la biosíntesis del colesterol humano.
Objetivo del estudio:
- Para determinar la estructura cristalina de la S. aureus deshidrosqualeno sintasa (CrtM). para determinar la estructura cristalina de S. aureus deshidrosqualeno sintasa (CrtM). para determinar la estructura cristalina de S. aureus deshidrosqualeno sintasa (CrtM). para determinar la estructura cristalina de S. aureus deshidrosqualeno sintasa (CrtM). para determinar la estructura cristalina de S. aureus deshidrosqualeno sintasa (CrtM). para determinar la estructura cristalina de S. aureus deshidrosqualeno sintasa (CrtM). para determinar la estructura cristalina de S. aureus
- Investigar el potencial de inhibir la biosíntesis de estafiloxantina como estrategia terapéutica contra S. aureus.
Principales métodos:
- Determinación de las estructuras cristalinas de CrtM a una resolución de 1,58 angstroms.
- Se examinaron nueve inhibidores de la escaleno sintasa (SQS) para la actividad contra CrtM.
- Estructuras determinadas de tres inhibidores del SQS unidos al CrtM.
Principales resultados:
- Se encontró una similitud estructural entre CrtM y SQS humano.
- Se identificó un inhibidor de SQS que bloquea efectivamente la biosíntesis de estafiloxantina in vitro.
- Se ha demostrado que la inhibición de la producción de estafiloxantina aumenta la susceptibilidad bacteriana al aclaramiento inmune del huésped in vitro e in vivo.
Conclusiones:
- Dirigirse a la biosíntesis de estafiloxantina es una estrategia viable contra las infecciones por S. aureus.
- Las terapias basadas en el factor de virulencia ofrecen un enfoque prometedor para combatir las bacterias resistentes a los antibióticos.
- Las perspectivas estructurales en CrtM pueden guiar el desarrollo de nuevos agentes anti-estafilococos.
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