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Oliveira A, Araújo A, Rodrigues LC, Silva CS, Reis RL, Neves NM, Leão P, Martins A. Metronidazole Delivery Nanosystem Able To Reduce the Pathogenicity of Bacteria in Colorectal Infection. Biomacromolecules 2022; 23:2415-2427. [PMID: 35623028 PMCID: PMC9774670 DOI: 10.1021/acs.biomac.2c00186] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Metronidazole (MTZ) is a drug potentially used for the treatment of intestinal infections, namely, the ones caused by colorectal surgery. The traditional routes of administration decrease its local effectiveness and present off-site effects. To circumvent such limitations, herein a drug delivery system (DDS) based on MTZ-loaded nanoparticles (NPs) immobilized at the surface of electrospun fibrous meshes is proposed. MTZ at different concentrations (1, 2, 5, and 10 mg mL-1) was loaded into chitosan-sodium tripolyphosphate NPs. The MTZ loaded into NPs at the highest concentration showed a quick release in the first 12 h, followed by a gradual release. This DDS was not toxic to human colonic cells. When tested against different bacterial strains, a significant reduction of Escherichia coli and Staphylococcus aureus was observed, but no effect was found against Enterococcus faecalis. Therefore, this DDS offers high potential to locally prevent the occurrence of infections after colorectal anastomosis.
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Affiliation(s)
- Ana Oliveira
- 3B’s
Research Group, I3Bs − Research Institute on Biomaterials,
Biodegradables & Biomimetics of University of Minho, Headquarters
of the European Institute of Excellence on Tissue Engineering &
Regenerative Medicine, AvePark - Parque de Ciência e Tecnologia, Zona Industrial
da Gandra, Barco, Guimarães 4805-017 Portugal,Life
and Health Sciences Research Institute (ICVS), School of Medicine,
University of Minho, Campus of Gualtar, Braga 4710-057, Portugal,ICVS/3B’s
− PT Government Associate Laboratory, Braga/Guimarães 4710-057, Portugal
| | - Ana Araújo
- 3B’s
Research Group, I3Bs − Research Institute on Biomaterials,
Biodegradables & Biomimetics of University of Minho, Headquarters
of the European Institute of Excellence on Tissue Engineering &
Regenerative Medicine, AvePark - Parque de Ciência e Tecnologia, Zona Industrial
da Gandra, Barco, Guimarães 4805-017 Portugal,ICVS/3B’s
− PT Government Associate Laboratory, Braga/Guimarães 4710-057, Portugal
| | - Luísa C. Rodrigues
- 3B’s
Research Group, I3Bs − Research Institute on Biomaterials,
Biodegradables & Biomimetics of University of Minho, Headquarters
of the European Institute of Excellence on Tissue Engineering &
Regenerative Medicine, AvePark - Parque de Ciência e Tecnologia, Zona Industrial
da Gandra, Barco, Guimarães 4805-017 Portugal,ICVS/3B’s
− PT Government Associate Laboratory, Braga/Guimarães 4710-057, Portugal
| | - Catarina S. Silva
- 3B’s
Research Group, I3Bs − Research Institute on Biomaterials,
Biodegradables & Biomimetics of University of Minho, Headquarters
of the European Institute of Excellence on Tissue Engineering &
Regenerative Medicine, AvePark - Parque de Ciência e Tecnologia, Zona Industrial
da Gandra, Barco, Guimarães 4805-017 Portugal,ICVS/3B’s
− PT Government Associate Laboratory, Braga/Guimarães 4710-057, Portugal
| | - Rui L. Reis
- 3B’s
Research Group, I3Bs − Research Institute on Biomaterials,
Biodegradables & Biomimetics of University of Minho, Headquarters
of the European Institute of Excellence on Tissue Engineering &
Regenerative Medicine, AvePark - Parque de Ciência e Tecnologia, Zona Industrial
da Gandra, Barco, Guimarães 4805-017 Portugal,ICVS/3B’s
− PT Government Associate Laboratory, Braga/Guimarães 4710-057, Portugal
| | - Nuno M. Neves
- 3B’s
Research Group, I3Bs − Research Institute on Biomaterials,
Biodegradables & Biomimetics of University of Minho, Headquarters
of the European Institute of Excellence on Tissue Engineering &
Regenerative Medicine, AvePark - Parque de Ciência e Tecnologia, Zona Industrial
da Gandra, Barco, Guimarães 4805-017 Portugal,ICVS/3B’s
− PT Government Associate Laboratory, Braga/Guimarães 4710-057, Portugal
| | - Pedro Leão
- Life
and Health Sciences Research Institute (ICVS), School of Medicine,
University of Minho, Campus of Gualtar, Braga 4710-057, Portugal,ICVS/3B’s
− PT Government Associate Laboratory, Braga/Guimarães 4710-057, Portugal
| | - Albino Martins
- 3B’s
Research Group, I3Bs − Research Institute on Biomaterials,
Biodegradables & Biomimetics of University of Minho, Headquarters
of the European Institute of Excellence on Tissue Engineering &
Regenerative Medicine, AvePark - Parque de Ciência e Tecnologia, Zona Industrial
da Gandra, Barco, Guimarães 4805-017 Portugal,ICVS/3B’s
− PT Government Associate Laboratory, Braga/Guimarães 4710-057, Portugal,
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Nanoparticles encapsulation of Phoenix dactylifera (date palm) mucilage for colonic drug delivery. Int J Biol Macromol 2021; 191:861-871. [PMID: 34571126 DOI: 10.1016/j.ijbiomac.2021.09.126] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 09/06/2021] [Accepted: 09/18/2021] [Indexed: 11/22/2022]
Abstract
Compressed tablet formation from granular drug require binder with Cohesiveness property. Plants mucilage as pharmaceutical excipients are available. In this study, biocompatible date palm mucilage was encapsulated with silver nano particles for sustained drug release to provoke an immune response. Nano formulated mucilage was characterized by UV/VIS, FTIR, XRD, SEM/EDX spectrophotometry. UV/VIS spectra revealed an intense surface plasmon resonance peak at 406 nm for spherical mono dispersed silver nano formulated mucilage resulted from efficient reduction of silver ions to AgNPs. Zeta sizer disclosed the emergence of single peak at 139.7 nm with 100% intensity. Crude mucilage exhibited number of peaks in the region of 4000-500 cm-1 by FT-IR spectroscopy whereas purified as well as nano formulated samples showed somewhat different pattern of peaks in addition to peaks of crude sample. XRD spectra of crude mucilage revealed somewhat regular pattern while purified and modified mucilage displayed irregular structure. In SEM analysis, crude mucilage was appeared as granular that turned into porous network with entangled tiny silver nano spheres. A controlled release of drug levofloxacin hemihydrate was evaluated using crude/ nano formulated mucilage as excipient. Nano formulated mucilage delayed the onset exposure of drug in gastric medium giving recommendations as value added bio binder for drug to the target organ.
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