title: Design of pH-responsive nanoparticles of terpolymer of poly(methacrylic acid), polysorbate 80 and starch for delivery of doxorubicin.
abstract: This work focused on the design of new pH-responsive nanoparticles for controlled delivery of anticancer drug doxorubicin (Dox). Nanoparticles of poly(methacrylic acid)-polysorbate 80-grafted starch (PMAA-PS 80-g-St) were synthesized by using a one-pot method that enabled simultaneous grafting of PMAA and PS 80 onto starch and nanoparticle formation in an aqueous medium. The particles were characterized by FTIR, (1)H NMR, TEM, DLS, and potentiometric titration. Dox loading and in vitro release from the nanoparticles were investigated. The FTIR and (1)H NMR confirmed the chemical composition of the graft terpolymer. The nanoparticles were relatively spherical with narrow size distribution and porous morphology. They exhibited pH-dependent swelling in a physiological pH range. The particle size and magnitude of phase transition were dependent on polymer composition and formulation parameters such as concentrations of surfactant and cross-linking agent and total monomer concentration. The nanoparticles with optimized compositions showed high loading capacity for Dox and sustained Dox release. The results suggest that the new pH-responsive terpolymer nanoparticles are useful in controlled drug delivery.
authors.affiliation: Department of Pharmaceutical Sciences, Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, ON, Canada. shalviri66@yahoo.com
authors.forename: Alireza
authors.initials: A
authors.lastname: Shalviri
authors.forename: Ho Ka
authors.initials: HK
authors.lastname: Chan
authors.forename: Gaurav
authors.initials: G
authors.lastname: Raval
authors.forename: Mohammad J
authors.initials: MJ
authors.lastname: Abdekhodaie
authors.forename: Qiang
authors.initials: Q
authors.lastname: Liu
authors.forename: Heiko
authors.initials: H
authors.lastname: Heerklotz
authors.forename: Xiao Yu
authors.initials: XY
authors.lastname: Wu
mesh_terms: D000903:Antibiotics, Antineoplastic / Q000008:administration & dosage* / Q000737:chemistry; D002264:Carboxylic Acids / Q000737:chemistry; D004317:Doxorubicin / Q000008:administration & dosage* / Q000737:chemistry; D005079:Excipients; D006863:Hydrogen-Ion Concentration; D008027:Light; D009682:Magnetic Resonance Spectroscopy; D046529:Microscopy, Electron, Transmission; D053758:Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D011109:Polymethacrylic Acids / Q000737:chemistry*; D011136:Polysorbates / Q000737:chemistry*; D012542:Scattering, Radiation; D017550:Spectroscopy, Fourier Transform Infrared; D013213:Starch / Q000737:chemistry*
chemical_list: D000903:Antibiotics, Antineoplastic; D002264:Carboxylic Acids; D005079:Excipients; D011109:Polymethacrylic Acids; D011136:Polysorbates; C030613:polymethacrylic acid; D004317:Doxorubicin; D013213:Starch