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Curdlan in fibers as carriers of tetracycline hydrochloride: Controlled release and antibacterial activity

El-Naggar, Mehrez E., Abdelgawad, Abdelrahman M., Salas, Carlos, Rojas, Orlando J.
Carbohydrate polymers 2016 v.154 pp. 194-203
Escherichia coli, antibacterial properties, aqueous solutions, cell viability, crosslinking, curdlan, differential scanning calorimetry, drugs, glutaraldehyde, image analysis, nanofibers, polyethylene glycol, scanning electron microscopy, spectroscopy, surface tension, tetracycline, thermal stability, thermogravimetry, viscosity
Curdlan (CURD) and polyethylene oxide were used to synthesize nanofibers as carriers of hydro soluble tetracycline hydrochloride (TCH). The viscosity, surface tension and conductivity of the precursor multicomponent aqueous solutions were determined and adjusted to produce defect-free fiber webs. Except for a slight increase in diameter, the addition of TCH did not affect the original morphology of the CURD/PEO nanofibers, as determined by FE-SEM imaging. However, the thermal stability of the system was enhanced (TGA and DSC). Moreover, water resistance, as measured with 24-h immersion tests, was observed upon crosslinking with glutaraldehyde. In-vitro activity measurements indicated a sustained and controlled TCH time-release pattern and excellent antibacterial activity against E. coli, as assessed by UV–vis spectroscopy and viable cell counting, respectively. Overall, we propose nanofibers based on CURD as promising platforms for scaffolds for wound dressing and drug delivery.