Development of ligustrazine hydrochloride carboxymethyl chitosan and collagen microspheres: Formulation optimization, characterization, and vitro release.
This study investigates the preparation of ligustrazine hydrochloride carboxymethyl chitosan and collagen microspheres. This experiment investigates effects of the ratio of carboxymethyl chitosan and collagen blend, water to oil ratio, stirring speed, and other factors on the microsphere properties. The experiment had the following conditions: a 1:2 proportion of carboxymethyl chitosan and collagen, a 1:2 proportion of drugs and materials, a 5:1 proportion of oil phase and water phase, 0.5% of span80, a 600r/min stirring speed, 3 ml of a cross-linking agent, 3 h of cross-linking curing, 1.25 ± 0.05 mm diameter LTH microcapsules, a 54.08% envelop rate, and a 14.16% carrier rate. The microspheres release rate reached 66% within 1 h, then steadily released within 5 h in vitro. The experimental results showed that the ligustrazine hydrochloride microsphere production process was stable and exhibited a good release effect compared with other ligustrazine hydrochloride tablets and pills.
a The College of Art and Science , Beijing Union University , Beijing , P.R. China.
Qiang
Q
Lin
b Biochemical Engineering College , Beijing Union University , Beijing , P.R. China.
Qing
Q
Huo
a The College of Art and Science , Beijing Union University , Beijing , P.R. China.
Yingzhe
Y
Qin
a The College of Art and Science , Beijing Union University , Beijing , P.R. China.
Zhuo
Z
Zhao
b Biochemical Engineering College , Beijing Union University , Beijing , P.R. China.
Fengyun
F
Tao
D048271:Chitosan / Q000031:analogs & derivatives* / Q000737:chemistry; D003094:Collagen / Q000737:chemistry*; D004337:Drug Carriers / Q000737:chemistry*; D065546:Drug Liberation; D008863:Microspheres; D010316:Particle Size; D011719:Pyrazines / Q000737:chemistry*
D004337:Drug Carriers; D011719:Pyrazines; C514968:carboxymethyl-chitosan; D003094:Collagen; D048271:Chitosan; C017953:tetramethylpyrazine
carboxymethyl chitosan; collagen; ligustrazine hydrochloride; micro spheres