Reverse Gradient Distributions of Drug and Polymer Molecules within Electrospun Core–Shell Nanofibers for Sustained Release

International Journal of Molecular Sciences, Journal Year: 2024, Volume and Issue: 25(17), P. 9524 - 9524

Published: Sept. 1, 2024

Core–shell nanostructures are powerful platforms for the development of novel nanoscale drug delivery systems with sustained release profiles. Coaxial electrospinning is facile and convenient creating medicated core–shell elaborate designs which sustained-release behaviors molecules can be intentionally adjusted. With resveratrol (RES) as a model poorly water-soluble cellulose acetate (CA) PVP polymeric carriers, brand-new electrospun nanostructure was fabricated in this study. The guest RES host CA were designed to have reverse gradient distribution within nanostructures. Scanning electron microscope transmission evaluations verified that these nanofibers had linear morphologies, without beads or spindles, an obvious double-chamber structure. X-ray diffraction patterns Fourier transform infrared spectroscopic results indicated involved components highly compatible presented amorphous molecular state. In vitro dissolution tests new structures able prevent initial burst release, extend continuous-release time period, reduce negative tailing-off effect, thus ensuring better profile than traditional blended drug-loaded nanofibers. mechanism underlying influence structure RES/CA on proposed. Based proof-of-concept demonstration, series advanced functional nanomaterials similarly developed based distributions multi-chamber

Language: Английский

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Synergistic Effects of Radical Distributions of Soluble and Insoluble Polymers within Electrospun Nanofibers for an Extending Release of Ferulic Acid

Polymers, Journal Year: 2024, Volume and Issue: 16(18), P. 2614 - 2614

Published: Sept. 15, 2024

Polymeric composites for manipulating the sustained release of an encapsulated active ingredient are highly sought after many practical applications; particularly, water-insoluble polymers and core–shell structures frequently explored to manipulate behaviors drug molecules over extended time period. In this study, electrospun nanostructures were utilized develop a brand-new strategy tailor spatial distributions both insoluble polymer (ethylcellulose, EC) soluble (polyvinylpyrrolidone, PVP) within nanofibers, thereby extended-release loaded ingredient, ferulic acid (FA). Scanning electron microscopy transmission assessments revealed that all prepared nanofibers had linear morphology without beads or spindles, those from coaxial processes obvious structure. X-ray diffraction attenuated total reflectance Fourier transform infrared spectroscopic tests confirmed FA fine compatibility with EC PVP, presented in amorphous state. vitro dissolution indicated radical (decreasing shell core) PVP (increasing able play their important role elaborately. On one hand, F3 advantages homogeneous composite F1 higher content solutions inhibit initial burst provide longer period release. other F2 core negative tailing-off The key element was water permeation rates, controlled by ratios polymers. new based on structure paves way developing wide variety polymeric heterogeneous realizing desired functional performances.

Language: Английский

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Copper in melanoma: at the crossroad of protumorigenic and anticancer roles

Redox Biology, Journal Year: 2025, Volume and Issue: 81, P. 103552 - 103552

Published: Feb. 15, 2025

Language: Английский

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