Actividad antibiofilm del extracto de maqui (Aristotelia chilensis) sobre Escherichia coli en condiciones in vitro
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Gac Med Bol
Abstract
Objetivo: evaluar la efectividad antibiofilm del extracto de maqui (Aristotelia chilensis) sobre Escherichia coli en condiciones in vitro en el año 2025. Métodos: se realizó un estudio experimental in vitro longitudinal utilizando la cepa Eschericha coli ATCC 25922. Se preparó un extracto de hojas de maqui mediante maceración en agua y etanol. Se determinó la concentración mínima inhibitoria (CMI) y la concentración mínima bactericida (CMB) mediante métodos de dilución en caldo y recuento de unidades formadoras de colonias (UFC). La actividad antibiofilm se evaluó con el método de tinción de cristal violeta, midiendo la densidad óptica. Resultados: el extracto de maqui mostró una CMI de 10 µg/mL y una CMB de 100 µg/mL. A concentraciones superiores a 60 µg/ mL, la inhibición del crecimiento bacteriano fue comparable a la tetraciclina. La formación de biofilm se redujo significativamente con concentraciones a partir de 10 µg/mL, evidenciando un efecto inhibitorio creciente a medida que aumentaba la concentración del extracto. Conclusiones: Los resultados sugieren que el extracto de maqui posee potencial como agente antimicrobiano natural contra Eschericha coli, especialmente en la inhibición de biofilm. Esto resalta la importancia de explorar alternativas vegetales en el contexto de la creciente resistencia a los antibióticos, ofreciendo nuevas vías para el desarrollo de tratamientos con base en compuestos naturales. Se recomienda realizar estudios in vivo para confirmar la bioactividad observada.
Objective: to evaluate the antibiofilm effectiveness of maqui extract (Aristotelia chilensis) on Escherichia coli under in vitro conditions in the year 2025. Methods: an experimental longitudinal in vitro study was conducted using the Escherichia coli ATCC 25922 strain. An extract of maqui leaves was prepared through maceration in water and ethanol. The minimum inhibitory concentration (MIC) and the minimum bactericidal concentration (MBC) were determined using broth dilution methods and colony-forming unit (CFU) counting. The antibiofilm activity was assessed using the crystal violet staining method, measuring optical density. Results: the maqui extract exhibited a MIC of 10 µg/mL and an MBC of 100 µg/mL. At concentrations above 60 µg/mL, the inhibition of bacterial growth was comparable to tetracycline. Biofilm formation was significantly reduced at concentrations starting from 10 µg/mL, showing a growing inhibitory effect as the concentration of the extract increased. Conclusions: the results suggest that maqui extract has potential as a natural antimicrobial agent against Eschericha coli, particularly in inhibiting biofilm formation. This highlights the importance of exploring plant-based alternatives in the context of increasing antibiotic resistance, offering new avenues for the development of treatments based on natural compounds. Further in vivo studies are recommended to confirm the observed bioactivity.
Objective: to evaluate the antibiofilm effectiveness of maqui extract (Aristotelia chilensis) on Escherichia coli under in vitro conditions in the year 2025. Methods: an experimental longitudinal in vitro study was conducted using the Escherichia coli ATCC 25922 strain. An extract of maqui leaves was prepared through maceration in water and ethanol. The minimum inhibitory concentration (MIC) and the minimum bactericidal concentration (MBC) were determined using broth dilution methods and colony-forming unit (CFU) counting. The antibiofilm activity was assessed using the crystal violet staining method, measuring optical density. Results: the maqui extract exhibited a MIC of 10 µg/mL and an MBC of 100 µg/mL. At concentrations above 60 µg/mL, the inhibition of bacterial growth was comparable to tetracycline. Biofilm formation was significantly reduced at concentrations starting from 10 µg/mL, showing a growing inhibitory effect as the concentration of the extract increased. Conclusions: the results suggest that maqui extract has potential as a natural antimicrobial agent against Eschericha coli, particularly in inhibiting biofilm formation. This highlights the importance of exploring plant-based alternatives in the context of increasing antibiotic resistance, offering new avenues for the development of treatments based on natural compounds. Further in vivo studies are recommended to confirm the observed bioactivity.
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Vol. 48, No. 2