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Ribeiro LNDM, de Paula E, Rossi DA, Martins FA, de Melo RT, Monteiro GP, Breitkreitz MC, Goulart LR, Fonseca BB. Nanocarriers From Natural Lipids With In Vitro Activity Against Campylobacter jejuni. Front Cell Infect Microbiol 2021; 10:571040. [PMID: 33489930 PMCID: PMC7820125 DOI: 10.3389/fcimb.2020.571040] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Accepted: 11/25/2020] [Indexed: 12/17/2022] Open
Abstract
Campylobacter jejuni (CJ) is the most prevalent zoonotic pathogen of chicken meat and related products, which may lead to gastroenteritis and autoimmune diseases in humans. Although controlling this bacterium is important, CJ strains resistance against traditional antibiotic therapy has been increased. Vegetable oils and fats are natural biomaterials explored since the Ancient times, due to their therapeutic properties. Nanotechnology has promoted the miniaturization of materials, improving bioavailability and efficacy, while reducing the toxicity of loaded active molecules. In this work, a screening of 28 vegetable oils was firstly performed, in order to select anti-CJ candidates by the disc diffusion test. Thus, the selected liquid lipids were used as active molecules in nanostructured lipid carriers (NLC) formulations. The three resultant systems were characterized in terms of particle size (~200 nm), polydispersity index (~0.15), and zeta potential (~-35mV), and its physicochemical stability was confirmed for a year, at 25°C. The structural properties of NLC were assessed by infrared (FTIR-ATR) and differential scanning calorimetry (DSC) analyses. The spherical nanoparticle morphology and narrow size distribution was observed by transmission electron microscopy (TEM) and field emission scanning electron (FE-SEM) analyses, respectively. Then, the in vitro antimicrobial activity test determined the minimum inhibitory concentration (MIC) of each formulation against CJ strains, in both free (1-3 mg/ml-1) and sessile (0.78 mg/ml-1) forms. Finally, the in vitro biocompatibility of NLC was demonstrated through cell viability using VERO cell line, in which F6 was found twice less cytotoxic than pure olibanum oil. Considering the abovementioned achieved, F6 formulation is able to be evaluated in the in vivo anti-CJ efficacy assays.
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Affiliation(s)
- Lígia Nunes de Morais Ribeiro
- School of Veterinary Medicine, Federal University of Uberlandia, Uberlândia, Brazil.,Institute of Biotechnology, Federal University of Uberlandia, Uberlândia, Brazil.,Department of Biochemistry and Tissue Biology, Institute of Biology, University of Campinas, Campinas, Brazil
| | - Eneida de Paula
- Department of Biochemistry and Tissue Biology, Institute of Biology, University of Campinas, Campinas, Brazil
| | | | - Flávia Alves Martins
- Institute of Biotechnology, Federal University of Uberlandia, Uberlândia, Brazil
| | | | | | | | - Luiz Ricardo Goulart
- Institute of Biotechnology, Federal University of Uberlandia, Uberlândia, Brazil
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