Frontiers in Cellular and Infection Microbiology (Jan 2024)

Lipid nanoparticles based on natural matrices with activity against multidrug resistant bacterial species

  • Elenice Francisco da Silva,
  • Luciana Machado Bastos,
  • Belchiolina Beatriz Fonseca,
  • Belchiolina Beatriz Fonseca,
  • Rosineide Marques Ribas,
  • Simone Sommerfeld,
  • Henrique Machado Pires,
  • Fernanda Aparecida Longato dos Santos,
  • Lígia Nunes de Morais Ribeiro

DOI
https://doi.org/10.3389/fcimb.2023.1328519
Journal volume & issue
Vol. 13

Abstract

Read online

Lately, the bacterial multidrug resistance has been a reason to public health concerning around world. The development of new pharmacology therapies against infections caused by multidrug-resistant bacteria is urgent. In this work, we developed 10 NLC formulations composed of essential oils (EO), vegetable butter and surfactant. The formulations were evaluated for long-term and thermal cycling stability studies in terms of (particle size, polydispersion index and Zeta potential). In vitro antimicrobial assays were performed using disk diffusion test and by the determination of the minimum inhibitory concentration (MIC) performed with fresh and a year-old NLC. The most promising system and its excipients were structurally characterized through experimental methodologies (FTIR-ATR, DSC and FE-SEM). Finally, this same formulation was studied through nanotoxicity assays on the chicken embryo model, analyzing different parameters, as viability and weight changes of embryos and annexes. All the developed formulations presented long-term physicochemical and thermal stability. The formulation based on cinnamon EO presented in vitro activity against strains of Acinetobacter baumannii, Klebsiella pneumoniae and Pseudomonas aeruginosa isolated from humans and in vivo biocompatibility. Considering these promising results, such system is able to be further tested on in vivo efficacy assays.

Keywords