AVALIAÇÃO DO MECANISMO DE RESISTÊNCIA BACTERIANA DE NANOPARTÍCULAS DE QUITOSANA ASSOCIADAS COM GENTAMICINA EM Staphylococcus aureus

DOI: 10.53524/lit.edt.978-65-84528-45-1/05

PALAVRAS CHAVE: Antibiótico. Nanotecnologia. Quitosana.

KEYWORDS: Antibiotic. Nanotechnology. Chitosan.

ABSTRACT: OBJECTIVE: To verify the resistance mechanism in S. aureus using chitosan nanoparticles with gentamicin. MATERIALS AND METHODS: Nanoparticles were synthesized by ionic gelation, resulting in pure chitosan nanoparticles (NPQT) and nanoparticles associated with gentamicin (NPQT-GEN). Particle sizes were determined by DLS. Nanoparticle yield was evaluated and characterized by FTIR. Antibacterial activity was tested by minimum inhibitory concentration (MIC). RESULTS AND DISCUSSION: The sizes of NPQT (2.0 mg/mL) and NPQT-GEN (0.5 mg/mL) were 197.7 ± 1.24 nm and 406.6 ± 10.9 nm, respectively, with polydispersity indices between 0.27 and 0.31. Safe solutions are guaranteed after storage. FTIR confirmed the formation of nanoparticles by shifting the bands at 1660 and 1580 cm⁻¹ from chitosan to 1640 and 1530 cm⁻¹. In NPQT-GEN, there was an increase in intensity in the NH and CO bands. CONCLUSION: Therefore, the present study showed that concentrations of 2.0 mg/ml and 0.5 mg/mL were better, respectively. Thus, presenting promising results against bacterial strains.

Autor

  • Fernanda Guimarães Valverde

  • Helena de Almeida Cerqueira Kodel

  • Tatiane Batista dos Santos

  • Willamys Souza Correa

Desenvolvido por Alexsander Arcelino