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1.
Braz. J. Pharm. Sci. (Online) ; 56: e18440, 2020. tab, graf
Article in English | LILACS | ID: biblio-1249159

ABSTRACT

In this study, naftifine (a topical antifungal drug) loaded poly(vinyl) alcohol (PVA)/sodium alginate (SA) nanofibrous mats were prepared using the single-needle electrospinning technique. The produced nanofibers were crosslinked with glutaraldehyde (GTA) vapor. The morphology and diameter of the electrospun nanofibers were studied by scanning electron microscopy (SEM). SEM images showed the smoothness of the nanofibers and indicated that the fiber diameter increased with crosslinking and drug loading. Atomic force microscopy (AFM) images confirmed the uniform production of the scaffolds, and elemental mapping via energy dispersive X-ray spectroscopy (EDS) showed the uniform distribution of the drug within the nanofibers. An attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy study demonstrated that naftifine has sufficient secondary interactions with the polymer blend. The crosslinking treatment decreased the burst drug release effectively and the release mechanism followed Korsmeyer-Peppas Super Case-II transport. Overall, these findings suggest the potential use of naftifine-loaded PVA/SA nanofibers as a topical antifungal drug delivery system.


Subject(s)
Administration, Topical , Nanofibers/analysis , Spectrometry, X-Ray Emission/instrumentation , Spectrum Analysis/instrumentation , Pharmaceutical Preparations/administration & dosage , Drug Delivery Systems , Spectroscopy, Fourier Transform Infrared/methods , Microscopy, Atomic Force/instrumentation , Alginates/adverse effects , Drug Liberation
2.
Braz. arch. biol. technol ; 62: e19180266, 2019. tab, graf
Article in English | LILACS | ID: biblio-1055379

ABSTRACT

Abstract Phytochemical content of plant extracts can be used effectively to reduce the metal ions to nanoparticles in one-step green synthesis process. In this study, six plant extracts were used for the synthesis of silver nanoparticles (AgNPs). Biologically synthesized AgNPs was characterized using UV-Vis Spectrophotometer, Field Emission Scanning Electron Microscope (FE-SEM), X-ray diffraction (XRD), Energy Dispersive X-ray spectroscopy (EDX) and Fourier Transform Infrared (FTIR) spectroscopy. The individual and combined effects of AgNPs and tetracycline against S. aureus and K. pneumoniae were assessed. Ginger, onion and sidr extracts supported AgNPs formation while arak, garlic and mint extracts failed to convert the silver ions to AgNPs. The present findings revealed significant differences between the tested plant extracts in supporting AgNPs synthesis. AgNPs synthesized by ginger showed the highest individual and combined activity against tested strains followed by AgNPs prepared by sidr then that synthesized by onion. AgNPs significantly enhanced tetracycline activity (p≤0.05) against S. aureus and K. pneumoniae. The results of this study demonstrated that the combination of tetracycline and biologically synthesized AgNPs presented a useful therapeutically method for the treatment of bacterial infection and counterattacking bacterial resistance.


Subject(s)
Silver/pharmacology , Staphylococcus aureus/drug effects , Tetracycline/biosynthesis , Plant Extracts/biosynthesis , Klebsiella pneumoniae/drug effects , Spectrometry, X-Ray Emission/instrumentation , X-Ray Diffraction/instrumentation , Spectrophotometers/methods , Spectroscopy, Fourier Transform Infrared/instrumentation
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