DOI: 10.53524/lit.edt.978-65-84528-60-4/10
PALAVRAS-CHAVE: Nanopartículas poliméricas. Tabebuia roseoalba. Atividade antimicrobiana. Polímeros biodegradáveis. Concentração inibitória mínima.
KEYWORDS: Polymeric nanoparticles. Tabebuia roseoalba. Antimicrobial activity. Biodegradable polymers. Minimum inhibitory concentration.
ABSTRACT: OBJECTIVE: To develop PHBV-based nanoparticles containing T. roseoalba extracts and evaluate their antimicrobial activity. METHODS: Leaves of T. roseoalba were collected in Goiânia–GO, botanically identified, and subjected to cold maceration extraction using absolute ethanol or ethyl acetate, followed by ultrasound treatment and solvent evaporation. Antimicrobial activity was evaluated against S. aureus (MRSA), P. aeruginosa, and E. coli by determining the minimum inhibitory concentration (MIC). Purified PHBV nanoparticles were obtained using the miniemulsion/solvent evaporation technique, with and without incorporation of plant extracts, and characterized by dynamic light scattering (DLS) and atomic force microscopy (AFM). RESULTS AND DISCUSSION: Ethanolic extraction showed a higher yield of bioactive compounds. Extract incorporation resulted in stable and homogeneous nanoparticles, confirming the suitability of PHBV as a biodegradable matrix. Nanoparticles functionalized with ethanolic extract exhibited enhanced antimicrobial activity, with MIC values of 39.06 µg/mL against S. aureus and P. aeruginosa and 78.12 µg/mL against E. coli, suggesting promising therapeutic potential. CONCLUSION: The incorporation of T. roseoalba extracts into biodegradable PHBV nanoparticles represents a promising in vitro strategy to enhance antimicrobial activity.
Enzo Henrike Bitencourt de Morais
Kelisson Alves Sousa
Marianne Celestino Andrade
Pedro Henrique da Silva Rodrigues
Tatiane Batista dos Santos
Victória Garcia Peres
Desenvolvido por Alexsander Arcelino