Molecular Docking and Efficacy of Gel Based on Chitosan Nanoparticles against and Its Antioxidant and Anti-Inflammatory Activities.

The medicinal administration of gel has become promising in pharmaceutical and cosmetic applications particularly with the development of the nanotechnology concept. Nowadays, effective treatment is a global problem; therefore, the development of natural products with nanopolymers such as chitosan nanoparticles (CSNPs) could represent a novel strategy for the treatment of gastric infection of . HPLC analysis of gel indicated the presence of chlorogenic acid as the main constituent (1637.09 µg/mL) with other compounds pyrocatechol (1637.09 µg/mL), catechin (1552.92 µg/mL), naringenin (528.78 µg/mL), rutin (194.39 µg/mL), quercetin (295.25 µg/mL), and cinnamic acid (37.50 µg/mL). CSNPs and gel incorporated with CSNPs were examined via TEM, indicating mean sizes of 83.46 nm and 36.54 nm, respectively. FTIR spectra showed various and different functional groups in CSNPs, gel, and gel incorporated with CSNPs. Two strains of were inhibited using gel with inhibition zones of 16 and 16.5 mm, while gel incorporated with CSNPs exhibited the highest inhibition zones of 28 and 30 nm with resistant and sensitive strains, respectively. The minimal inhibitory concentration (MIC) was 15.62 and 3.9 µg/mL, while the minimal bactericidal concentration (MBC) was 15.60 and 7.8 µg/mL with MBC/MIC 1 and 2 indexes using gel and gel incorporated with CSNPs, respectively, against the resistance strain. DPPH Scavenging (%) of the antioxidant activity exhibited an IC of 138.82 μg/mL using gel extract, and 81.7 μg/mL when gel was incorporated with CSNPs. gel incorporated with CSNPs enhanced the hemolysis inhibition (%) compared to using gel alone. Molecular docking studies through the interaction of chlorogenic acid and pyrocatechol as the main components of gel and CSNPs with the crystal structure of the (4HI0) protein supported the results of anti- activity.