Preparation and evaluation of berberine alginate beads for stomach-specific delivery.
Molecules
; 16(12): 10347-56, 2011 Dec 14.
Article
em En
| MEDLINE
| ID: mdl-22169938
ABSTRACT
The purpose of this research was to prepare floating calcium alginate beads of berberine for targeting the gastric mucosa and prolonging their gastric residence time. The floating beads were prepared by suspending octodecanol and berberine in sodium alginate (SA) solution. The suspension was then dripped into a solution of calcium chloride. The hydrophobic and low-density octodecanol enhanced the sustained-release properties and floating ability of the beads. The bead formulation was optimized for different weight ratios of octodecanol and SA and evaluated in terms of diameter, floating ability and drug loading, entrapment and release. In vitro release studies showed that the floating and sustained release time were effectively increased in gastric media by addition of octodecanol. In vivo studies with rats showed that a significant increase in gastric residence time of beads had been achieved.
Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Estômago
/
Berberina
/
Sistemas de Liberação de Medicamentos
/
Alginatos
/
Microesferas
Tipo de estudo:
Diagnostic_studies
Limite:
Animals
Idioma:
En
Revista:
Molecules
Assunto da revista:
BIOLOGIA
Ano de publicação:
2011
Tipo de documento:
Article
País de afiliação:
China