In this study, two-layer poly(vinyl alcohol)/gelatin
(PVA/GEL)
nanofiber patches containing cinnamaldehyde (CA) in the first layer
and gentamicin (GEN) in the second layer were produced by the electrospinning
method. The morphology, chemical structures, and thermal temperatures
of the produced pure (PVA/GEL), CA-loaded (PVA/GEL/CA), GEN-loaded
(PVA/GEL/GEN), and combined drug-loaded (PVA/GEL/CA/GEN) nanofiber
patches were determined by scanning electron microscopy (SEM), Fourier
transform infrared spectroscopy, and differential scanning calorimetry,
respectively. Their mechanical properties, swelling and degradation
behavior, and drug release kinetics were investigated. SEM images
showed that both drug-free and drug-loaded nanofiber patches possess
smooth and monodisperse structures, and nanofiber size increase occurred
as the amount of drug increased. The tensile test results showed that
the mechanical strength decreased as the drug was loaded. According
to the drug release results, CA release ended at the 96th hour, while
GEN release continued until the 264th hour. The antibacterial and
antibiofilm activities of PVA/GEL, PVA/GEL/CA, PVA/GEL/GEN, and PVA/GEL/CA/GEN
nanofiber patches against Pseudomonas aeruginosa and Staphylococcus aureus were evaluated.
Results showed that PVA/GEL/GEN and PVA/GEL/CA/GEN nanofiber patches
have excellent antibacterial and antibiofilm activities. Moreover,
all materials were biocompatible, with no cytotoxic effects in the
mammalian cell model for 8 days. PVA/GEL/GEN nanofiber patches were
the most promising material for a high cell survival ratio, which
was confirmed by SEM images. This research aims to develop an alternative
method to stop and treat the rapid progression of bacterial keratitis.