TY - JOUR
T1 - Characterization of Epigallocatechin-Gallate-Grafted Chitosan Nanoparticles and Evaluation of Their Antibacterial and Antioxidant Potential
AU - Moreno-Vasquez, Maria Jesús
AU - Plascencia-Jatomea, Maribel
AU - Sánchez-Valdes, Saúl
AU - Tánori-Córdova, Judith Celina
AU - Castillo Yañez, Francisco Javier
AU - Quintero-Reyes, Idania Emedith
AU - Graciano-Verdugo, Abril Zoraida
PY - 2021/4/23
Y1 - 2021/4/23
N2 - Nanoparticles based on chitosan modified with epigallocatechin gallate (EGCG) were synthetized by nanoprecipitation (EGCG-g-chitosan-P). Chitosan was modified by free-radical-induced grafting, which was verified by Fourier transform infrared (FTIR). Furthermore, the morphology, particle size, polydispersity index, and zeta potential of the nanoparticles were investigated. The grafting degree of EGCG, reactive oxygen species (ROS) production, antibacterial and antioxidant activities of EGCG-g-chitosan-P were evaluated and compared with those of pure EGCG and chitosan nanoparticles (Chitosan-P). FTIR results confirmed the modification of the chitosan with EGCG. The EGCG-g-chitosan-P showed spherical shapes and smoother surfaces than those of Chitosan-P. EGCG content of the grafted chitosan nanoparticles was 330 g/g. Minimal inhibitory concentration (MIC) of EGCG-g-chitosan-P (15.6 µg/mL) was lower than Chitosan-P (31.2 µg/mL) and EGCG (500 µg/mL) against Pseudomonas fluorescens (p < 0.05). Additionally, EGCG-g-chitosan-P and
Chitosan-P presented higher Staphylococcus aureus growth inhibition (100%) than EGCG at the lowest concentration tested. The nanoparticles produced an increase of ROS (p < 0.05) in both bacterial species assayed. Furthermore, EGCG-g-chitosan-P exhibited higher antioxidant activity than that of Chitosan-P (p < 0.05) in 2,20-azino-bis (3-ethyl-benzothiazoline-6-sulfonic acid) (ABTS),
2,2-diphenyl-1-picrylhydrazyl radical (DPPH) and ferric-reducing antioxidant power assays. Based on the above results, EGCG-g-chitosan-P shows the potential for food packaging and biomedical applications.
AB - Nanoparticles based on chitosan modified with epigallocatechin gallate (EGCG) were synthetized by nanoprecipitation (EGCG-g-chitosan-P). Chitosan was modified by free-radical-induced grafting, which was verified by Fourier transform infrared (FTIR). Furthermore, the morphology, particle size, polydispersity index, and zeta potential of the nanoparticles were investigated. The grafting degree of EGCG, reactive oxygen species (ROS) production, antibacterial and antioxidant activities of EGCG-g-chitosan-P were evaluated and compared with those of pure EGCG and chitosan nanoparticles (Chitosan-P). FTIR results confirmed the modification of the chitosan with EGCG. The EGCG-g-chitosan-P showed spherical shapes and smoother surfaces than those of Chitosan-P. EGCG content of the grafted chitosan nanoparticles was 330 g/g. Minimal inhibitory concentration (MIC) of EGCG-g-chitosan-P (15.6 µg/mL) was lower than Chitosan-P (31.2 µg/mL) and EGCG (500 µg/mL) against Pseudomonas fluorescens (p < 0.05). Additionally, EGCG-g-chitosan-P and
Chitosan-P presented higher Staphylococcus aureus growth inhibition (100%) than EGCG at the lowest concentration tested. The nanoparticles produced an increase of ROS (p < 0.05) in both bacterial species assayed. Furthermore, EGCG-g-chitosan-P exhibited higher antioxidant activity than that of Chitosan-P (p < 0.05) in 2,20-azino-bis (3-ethyl-benzothiazoline-6-sulfonic acid) (ABTS),
2,2-diphenyl-1-picrylhydrazyl radical (DPPH) and ferric-reducing antioxidant power assays. Based on the above results, EGCG-g-chitosan-P shows the potential for food packaging and biomedical applications.
U2 - doi.org/10.3390/polym13091375
DO - doi.org/10.3390/polym13091375
M3 - Artículo
SN - 2073-4360
VL - 13
SP - 1
EP - 24
JO - Polymers
JF - Polymers
M1 - 1375
ER -