[Zhonghua yan ke za zhi] Chinese journal of ophthalmology · 2006
[The dynamic study of retinoic acid and its alginate sodium microspheres in rabbit eye].
СтатьяНазвание и аннотация: Перевод в очереди
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Wang Feng-xiang, He Shou-zhi, Li Xin-jian, Liang Qiu-li, Chen Bing
Аннотация
OBJECTIVE: To obtain a intravitreous delay release system by injection of biodegradable polymers (alginate sodium-retinoic acid microspheres, AGS-RA microspheres) to the rabbit vitreous and study the release character of RA delivery system in vitro.
METHODS: RA was mixed with 1.5% alginate sodium and microspheres was made by a special electrostatic generator after dissolved in organic solvent; The content of AGS-RA in the microspheres and its release from the microspheres were measured by spectrophotometer. The characteristic of the metabolic dynamics of AGS-RA in the microspheres was analyzed by HPLC.
RESULTS: The size of microspheres we manufacture is (95.2443 +/- 8.6265) microm; Medicine contain quantity of RA is (1.7644 +/- 0.0453) microg/mg; Vitro test show that RA in the microspheres is release evenly in the 28 days of observation; Inject medicine to vitreous cavity show no poisonous side effect; The medicine dynamics research of microspheres showed that medicine is being even in 6 weeks releasing [the aqueous RA density of 1, 3 d, 1, 2, 3, 4, 5, 6 weeks is (23.79 +/- 0.15), (33.45 +/- 0.48), (19.95 +/- 0.79), (21.12 +/- 0.47), (19.65 +/- 0.35), (20.01 +/- 0.25), (18.24 +/- 0.27), (18.5 +/- 0.68) ng/ml, respectively]. Just in the 3rd day there is a release summit.
CONCLUSION: In vivo and in vitro tests show that AGS-RA microspheres can delay RA release uniformity.
METHODS: RA was mixed with 1.5% alginate sodium and microspheres was made by a special electrostatic generator after dissolved in organic solvent; The content of AGS-RA in the microspheres and its release from the microspheres were measured by spectrophotometer. The characteristic of the metabolic dynamics of AGS-RA in the microspheres was analyzed by HPLC.
RESULTS: The size of microspheres we manufacture is (95.2443 +/- 8.6265) microm; Medicine contain quantity of RA is (1.7644 +/- 0.0453) microg/mg; Vitro test show that RA in the microspheres is release evenly in the 28 days of observation; Inject medicine to vitreous cavity show no poisonous side effect; The medicine dynamics research of microspheres showed that medicine is being even in 6 weeks releasing [the aqueous RA density of 1, 3 d, 1, 2, 3, 4, 5, 6 weeks is (23.79 +/- 0.15), (33.45 +/- 0.48), (19.95 +/- 0.79), (21.12 +/- 0.47), (19.65 +/- 0.35), (20.01 +/- 0.25), (18.24 +/- 0.27), (18.5 +/- 0.68) ng/ml, respectively]. Just in the 3rd day there is a release summit.
CONCLUSION: In vivo and in vitro tests show that AGS-RA microspheres can delay RA release uniformity.