title: [Optimization of a novel mucoadhesive drug deliver system with ion-exchange resin core loaded with berberine hydrochloride using central composite design methodology].
abstract: A novel mucoadhesive microcapsule with drug-resin complex core loaded with berberine hydrochloride (BH) was developed and optimized. Drug-ion exchange resin (IER) complex was prepared by static method which stirring IER in drug solution at certain conditions. The influences of different IERs, different temperature, pH values and concentrations of drug solution on the drug loading were investigated. IER complex was coated by emulsion-solvent evaporation method. The coating fluid formulation was optimized using central composite design-response surface methodology, where the ratio between Carbopol 934 and IER (X1), the ratio between Eudragit and IER (X2) and the ratio between Eudragit RL and RS (X3) were taken as independent variables. Time of cumulative release 85% (Y1) and percentage of gastric retention (Y2) were taken as response variables. Drug loading achieved a high level and more drug available in the condition of IER (IRP 88), 37 degrees C, pH 5 and 1.0 mg x mL(-1) drug solution. When X1 = 0.75, X2 = 0.9, X3 = 0.6, the time of cumulative release reached 85% at 300 min, the highest percentage of gastric retention in the range of this experiment were procured.
authors.affiliation: School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China.
authors.forename: Fei
authors.initials: F
authors.lastname: Chen
authors.forename: Yue
authors.initials: Y
authors.lastname: Zhang
authors.forename: Qiang
authors.initials: Q
authors.lastname: Liu
authors.forename: Ming-zhi
authors.initials: MZ
authors.lastname: Pang
authors.forename: Xing-gang
authors.initials: XG
authors.lastname: Yang
authors.forename: Wei-san
authors.initials: WS
authors.lastname: Pan
mesh_terms: D000179:Acrylates / Q000737:chemistry; D000818:Animals; D001599:Berberine / Q000008:administration & dosage* / Q000493:pharmacokinetics*; D002214:Capsules; D003692:Delayed-Action Preparations; D004339:Drug Compounding / Q000379:methods; D016503:Drug Delivery Systems; D004655:Emulsions; D005753:Gastric Mucosa / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D007475:Ion Exchange Resins / Q000737:chemistry*; D008297:Male; D011108:Polymers / Q000737:chemistry; D051381:Rats; D017207:Rats, Sprague-Dawley; D013696:Temperature
chemical_list: D000179:Acrylates; D002214:Capsules; D003692:Delayed-Action Preparations; D004655:Emulsions; D007475:Ion Exchange Resins; D011108:Polymers; D001599:Berberine; C058665:Eudragit RL; C453622:carbopol 934P