Title:Moxifloxacin-Loaded Lipidic Nanoparticles for Antimicrobial Efficacy
Volume: 27
Issue: 1
Author(s): Mohammad Darvishi*, Shahrzad Farahani and Azadeh Haeri
Affiliation:
- Infectious Diseases and Tropical Medicine Research Center (IDTMRC), Faculty of Aerospace and Subaquatic Medicine, AJA University of Medical Sciences, Tehran,Iran
Keywords:
Nanoliposomes, moxifloxacin, antimicrobial effect, infection, liposomes, Minimum Inhibitory Concentration (MIC).
Abstract:
Background: Pulmonary infections are an increasing problem in individuals and current therapies
are lacking. Liposomes are spherical lipidic vesicles composed of phospholipid and cholesterol. Liposomes
have numerous advantages, such as biodegradability, biocompatibility, non-immunogenicity, lack of toxicity,
controlled release properties and high stability.
Objective: This work was carried out to construct a novel liposomal moxifloxacin formulation and examine its
antimicrobial effects against Pseudomonas aeruginosa and Staphylococcus aureus.
Methods: The liposomal moxifloxacin formulation was prepared by the thin-film hydration method. The bilayer
was composed of cholesterol and phospholipid at 30:70 molar ratio. To prepare cationic liposomes, 5%
cationic agent (CTAB) was added. The liposomes were reduced in size with the bath sonication technique.
The liposomal characterizations were tested regarding vesicle size, surface charge and drug encapsulation efficacy.
Microdilution method was used to determine the Minimum Inhibitory Concentration (MIC) against
Pseudomonas aeruginosa and Staphylococcus aureus of the free drug, neutral and cationic moxifloxacin liposomes.
Results: The size of the liposomes was 50-70 nm. The zeta potential of neutral and cationic vesicles was ∼0
and +22 mV. The MIC values against Pseudomonas aeruginosa of the free drug, neutral and cationic moxifloxacin
liposomes were 10, 5 and 2.5, respectively. The MICs against Staphylococcus aureus of the free
drug, neutral and cationic moxifloxacin liposomes were 1, 1 and 0.5, respectively.
Conclusion: This study demonstrates that the encapsulation of moxifloxacin into liposomes (especially cationic
vesicles) could enhance antimicrobial properties.