title: In vitro release dynamics of insulin from a loaded hydrophilic polymeric network.
abstract: A hydrophilic semi-interpenetrating polymer network of polyvinyl alcohol (PVA), poly(ethylene glycol) (PEG) and crosslinked polyacrylamide (PAM) chains has been synthesized and its potential for controlled release of macromolecular drugs has been assessed by taking insulin as a representative drug. The semi-IPN was characterized by IR studies and network parameters such as the average molecular weight between crosslinks (Mc), crosslink density (q), and number of elastically effective chains (Ve) were evaluated. The effect of chemical architecture of the IPN was investigated on the percent loading of insulin and its subsequent release from the loaded device. Other parameters such as the thickness of the gel, molecular weight of PEG and pH and temperature of the release medium were also studied for their possible impact on the release of insulin. The whole release data was analyzed by Ficks power law and the influence of various factors on the plausible mechanism of insulin release was investigated.
authors.affiliation: Bose Memorial Research Laboratory, Department of Chemistry, Government Autonomous Science College, Jabalpur, 482001, MP, India. akbmrl@yahoo.co.in
authors.forename: A K
authors.initials: AK
authors.lastname: Bajpai
authors.forename: Smitha
authors.initials: S
authors.lastname: Bhanu
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D001672:Biocompatible Materials / Q000737:chemistry; D003432:Cross-Linking Reagents; D003692:Delayed-Action Preparations; D006801:Humans; D020100:Hydrogels / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D066298:In Vitro Techniques; D007328:Insulin / Q000008:administration & dosage*; D007700:Kinetics; D008422:Materials Testing; D008970:Molecular Weight; D011092:Polyethylene Glycols / Q000737:chemistry; D011142:Polyvinyl Alcohol / Q000737:chemistry; D013055:Spectrophotometry, Infrared; D013499:Surface Properties; D013696:Temperature
chemical_list: D000180:Acrylic Resins; D001672:Biocompatible Materials; D003432:Cross-Linking Reagents; D003692:Delayed-Action Preparations; D020100:Hydrogels; D007328:Insulin; C016680:polyacrylamide gels; C062364:polyvinyl alcohol hydrogel; D011092:Polyethylene Glycols; D011142:Polyvinyl Alcohol