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Anti-virulent Disruption of Pathogenic Biofilms using Engineered Quorum-quenching Lactonases
Published on: January 1, 2016
Un componente de la inmunidad innata previene el desarrollo de biofilms bacterianos
Pradeep K Singh1, Matthew R Parsek, E Peter Greenberg
1Department of Internal Medicine, University of Iowa College of Medicine, Iowa City, Iowa 52242, USA. pradeep-singh@uiowa.edu
Nature
|May 31, 2002
Resumen
La lactoferrina, un factor inmune innato, previene la formación de biopelículas por Pseudomonas aeruginosa. Actúa quelatando el hierro, lo que estimula la motilidad bacteriana y previene la agregación en comunidades persistentes.
Área de la Ciencia:
- Inmunología Inmunología.
- Microbiología Microbiología.
- Enfermedades infecciosas Enfermedades infecciosas.
Sus antecedentes:
- La inmunidad innata protege las superficies de la mucosa a través de factores antimicrobianos.
- Las bacterias en las biopelículas son resistentes a las defensas del huésped y a los antibióticos, lo que complica las infecciones crónicas.
- Las biopelículas son comunidades bacterianas persistentes, encerradas en la matriz.
Objetivo del estudio:
- Para investigar si el sistema inmune innato tiene actividad específica anti-biofilm.
- Para determinar el papel de la lactoferrina en la prevención del desarrollo de biopelículas por Pseudomonas aeruginosa.
Principales métodos:
- Estudió el efecto de la lactoferrina en la formación de biopelículas de Pseudomonas aeruginosa.
- Evaluación de la respuesta bacteriana a la lactoferrina en concentraciones subletales.
- Investigó el papel de la quelación del hierro y la motilidad bacteriana.
Principales resultados:
- La lactoferrina bloquea significativamente el desarrollo del biofilm de Pseudomonas aeruginosa.
- Este efecto anti-biofilm se produce en concentraciones por debajo de los niveles bactericidas o inhibidores del crecimiento.
- La quelación del hierro por la lactoferrina estimula la motilidad de las contracciones bacterianas, previniendo la agregación.
Conclusiones:
- La lactoferrina actúa como una defensa inmune innata específica contra las infecciones de biofilm.
- Este mecanismo se dirige a la transición crítica de la motilidad bacteriana a la agregación de biofilm.
- Los hallazgos revelan una nueva estrategia anti-biofilm empleada por el sistema inmune innato.
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