Mucoadhesive interactions of amphiphilic cationic copolymers based on [2-(methacryloyloxy)ethyl]trimethylammonium chloride.
Three series of water-soluble cationic copolymers have been synthesised by free-radical copolymerisation of [2-(methacryloyloxy)ethyl]trimethylammonium chloride (MADQUAT) with methyl acrylate (MA), butyl acrylate (BA) and butyl methacrylate (BMA). The interactions between these copolymers and porcine stomach mucin have been studied in aqueous solutions using dynamic light scattering, zeta-potential measurements, turbidimetric titration and transmission electron microscopy (TEM). It was demonstrated that mixing aqueous dispersions of mucin with solutions of the cationic copolymers results in significant changes in size distribution and zeta-potential of its particles. It was found that an increase in the content of hydrophobic groups in copolymers leads to more efficient adsorption of macromolecules on the surface of mucin particles, which evidences the importance of hydrophobic effects in mucoadhesion. The efficiency of mucoadhesive interactions was found to be significantly dependent on pH, which affects the surface charge and aggregation stability of mucin.
Fefelova
Nataliya A
NA
Department of Chemical Physics and Macromolecular Chemistry, Kazakh National University, Karasai Batyra 95, 050012 Almaty, Kazakhstan.
Nurkeeva
Zauresh S
ZS
Mun
Grigoriy A
GA
Khutoryanskiy
Vitaliy V
VV
D000268:Adhesiveness; D016503:Drug Delivery Systems; D008855:Microscopy, Electron, Scanning; D009077:Mucins / Q000737:chemistry; D009092:Mucous Membrane / Q000378:metabolism*; D010316:Particle Size; D011108:Polymers / Q000737:chemistry*
D009077:Mucins; D011108:Polymers