title: Preparation and characterization of monensin loaded PLGA nanoparticles: in vitro anti-malarial activity against Plasmodium falciparum.
abstract: PLGA nanoparticles loaded with monensin (carboxylic ionophore) were prepared by emulsion solvent evaporation method using PLGA of molecular weight (Mw.) 19000 and 110000 Da. The nanoparticles were characterized by applying dynamic light scattering (DLS), atomic force microscopy (AFM), differential scanning calorimetry (DSC) and Fourier transformed infrared spectroscopy (FTIR). Negatively charged and spherical smooth surfaced nanoparticles of size range between 147-167 nm were obtained. The nanoparticles of monensin-PLGA showed no chemical interaction between monensin and the polymer molecules. The release kinetics in vitro studies exhibited biphasic release profile characterized by an initial fast release followed by a slower release. The antimalarial efficacy of monensin-PLGA nanoparticles was also examined. Monensin loaded in nanoparticles was 10-fold more effective in inhibiting the growth of P. falciparum in vitro as compared to free monensin. The antimalarial efficacy of monensin-PLGA nanoparticles was significantly dependent on the Mw. of the polymer.
authors.affiliation: Department of Biochemistry, University of Delhi South Campus, Benito Juarez Road, New Delhi 110021, India.
authors.forename: Ranu
authors.initials: R
authors.lastname: Surolia
authors.forename: Manendra
authors.initials: M
authors.lastname: Pachauri
authors.forename: Prahlad Chandra
authors.initials: PC
authors.lastname: Ghosh
mesh_terms: D000962:Antimalarials / Q000008:administration & dosage* / Q000737:chemistry / Q000493:pharmacokinetics; D002152:Calorimetry, Differential Scanning; D002478:Cells, Cultured; D004655:Emulsions / Q000008:administration & dosage / Q000737:chemistry / Q000493:pharmacokinetics; D004912:Erythrocytes / Q000187:drug effects; D006461:Hemolysis / Q000187:drug effects; D006801:Humans; D019344:Lactic Acid / Q000008:administration & dosage / Q000737:chemistry* / Q000493:pharmacokinetics; D008970:Molecular Weight; D008985:Monensin / Q000008:administration & dosage* / Q000737:chemistry / Q000493:pharmacokinetics; D053758:Nanoparticles / Q000008:administration & dosage / Q000737:chemistry*; D010316:Particle Size; D010963:Plasmodium falciparum / Q000187:drug effects*; D011100:Polyglycolic Acid / Q000008:administration & dosage / Q000737:chemistry* / Q000493:pharmacokinetics; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D000962:Antimalarials; D004655:Emulsions; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; D019344:Lactic Acid; D008985:Monensin