Síntese e atividade antimicrobiana de nanocompósitos de óxido de ferro/prata contra biofilmes de Pseudomonas aeruginosa

Autores

DOI:

https://doi.org/10.5902/2179460X84264

Palavras-chave:

Composto híbrido, Heterodímero, Artemia salina

Resumo

As Pseudomonas aeruginosa são reconhecidas pela patogenicidade, resistência aos antimicrobianos e habilidade de crescer em biofilmes o que as tornam ainda mais preocupantes na área da saúde. Neste contexto, a nanotecnologia permite o desenvolvimento de novos materiais contra micro-organismos multirresistentes. No presente trabalho foram preparadas dispersões coloidais de nanopartículas de óxido de ferro (IONPs), prata (AgNPs) e de compósito de óxido de ferro/prata (IO/Ag-NCs) que foram testados quanto à toxicidade e à atividade contra biofilmes de isolados clínicos de P. aeruginosa. Os nanocompósitos heterodímeros apresentaram morfologia esférica, potencial zeta indicando relativa estabilidade coloidal apesar da sua polidispersão. As nanopartículas não apresentaram toxicidade para Artemia salina nas concentrações testadas e inibiram a formação de biofilmes de alguns dos isolados clínicos de P. aeruginosa. As NPs resultaram na inibição da formação de biofilme de alguns dos isolados clínicos de P. aeruginosa. As AgNPs inibiram a formação de biofilme em 3 isolados, enquanto as IONPs a reduziram em 4 e as IO/Ag-NCs inibiram em 3 isolados de P. aeruginosa. Nossos resultados indicam que novas pesquisas devem ser direcionadas com estratégias que considerem o aumento da concentração de prata e a utilização de IO/Ag-NCs como nanocarreadores para o controle da formação de biofilmes microbianos.

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Biografia do Autor

Aline Fernandes Barcelos, Universidade Estadual de Goiás

Mestre em Ciências Aplicadas a Produtos para Saúde.

Alliny das Graças Amaral, Universidade Estadual de Goiás

Doutora em Ciência Animal.

Lílian Carla Carneiro, Universidade Federal de Goiás

Doutora em Biologia Celular e Molecular.

Plínio Lázaro Faleiro Naves, Universidade Estadual de Goiás

Doutor em Microbiologia e Parasitologia.

Luciana Rebelo Guilherme, Universidade Estadual de Goiás

Doutora em Química Inorgânica.

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Publicado

2025-04-29

Como Citar

Barcelos, A. F., Amaral, A. das G., Carneiro, L. C., Naves, P. L. F., & Guilherme, L. R. (2025). Síntese e atividade antimicrobiana de nanocompósitos de óxido de ferro/prata contra biofilmes de Pseudomonas aeruginosa. Ciência E Natura, 47, e84264. https://doi.org/10.5902/2179460X84264

Edição

Seção

Química

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