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정제교(Je Kyo Jeong),강길선(Gil Son Khang),이종문(Jong M . Rhee),신호철(Ho Chul Shin),이해방(Hai Bang Lee) 한국약제학회 2000 Journal of Pharmaceutical Investigation Vol.30 No.1
Bioavailability of ipriflavone (3-phenyl-7-isopropoxy-4H-1-benzopyran-4-one, IP), an antiosteoporotic drug with poor water-solubility, was studied for various types of pharmaceutical preparation in SD rats. The IP preparation types included ① intact IP, ② freezer milled IP (FIP), ③ freezer milled IP physically mixed with freezer milled poly-N-vinylpyrrolidone (PVP) (FIP+FPVP) and ④ spray-dried IP with PVP (SIP). Upon oral administration, SIP showed significantly higher absorption and elimination half-lives and the lag time (t_(lag)) than those of FIP+FPVP (approximately 2-fold). These results may be due to a sustained releasing effect of IP in the gastrointestinal tract by spray-drying with PVP. The C_(max) of SIP was about 2 and 10 times higher than those of FIP+FPVP and FIP, respectively. The AUC of SIP was about 6 times higher than that of FIP+FPVP and 60 times that of FIP. Scanning electron microscopy (SEM) showed that SIP consisted of the finest particle size and minimal aggregation than other IP preparations. It is concluded that the IP formula prepared by the spray-drying method with PVP is the most effective approach to the improvement of bioavailability of IP.
이프리플라본 고체분산체의 생체이용률에 미치는 폴리비닐피롤리돈의 분자량 및 혼합비율의 영향
정제교(Je Kyo Jeong),강길선(Gil Son Khang),이종문(John M . Rhee),신호철(Ho Chul Shin),이해방(Hai Bang Lee) 한국약제학회 2000 Journal of Pharmaceutical Investigation Vol.30 No.4
Ipriflavone (3-phenyl-7-isopropoxy-4H-1-benzopyran-4-one, IP) is a well-known antiosteoporotic drug with poor bioavailability. In the previous study, we reported that the IP formulation prepared by spray-drying method with polyvinylpymolidone (PVP) (SIP) was very effective in improving the bioavailability of IP. In this study, we examined the effects of molecular weight and mixture ratios of PVP to IP on the systemic absorption of IP following oral administration of SIP at a dose of 50 ㎎/㎏ to rats. In the effect of molecular weight, the Cmax of spray-dried IP with PVP K30 (SIP-K30) was significantly higher than those of spray-dried IP with PVP 360 (SIP-360), spray-dried IP with PVP K90 (SIP-K90), and spray-dried IP with PVP K17 (SIP-K17) (p<0.05). The AUC of SIP-K30 was about 2, 3, and 5.5 times higher than those of SIP-360, SIP-K90, and SIP-K17, respectively. The AUC value of SIP-K30 was significantly greater than those of SIP-K17 and SIP-K90 (p<0.05) except for SIP-360. In the ratio of PVP K30 to drug, the C_(max) and the AUC value of 3 : 7 IP-PVP solid dispersion were similar to those of 5 : 5 IP-PVP and significantly higher than those of the other solid dispersions (p<0.05). It was concluded that the spray-dried IP with PVP K30 at the ratio of 3:7 (w/w) was the best formulation for improving the bioavailablity of IP.
이해방 ( Hai Bang Lee ),정제교 ( Je Kyo Jeong ),손세일 ( Se Il Sohn ),변영로 ( Young Ro Byun ),기민효 ( Min Hyo Ki ),서중기 ( Jung Ki Seo ) 한국조직공학과 재생의학회 2009 조직공학과 재생의학 Vol.6 No.4
Drug delivery system(DDS) has been extensively applied the various areas as (1) novel methods for drug administration through several route, (2) development of novel polymeric carrier, and (3) tissue engineering and regenerative medicine. The aim of this review is to report the recent progress of "Development of controlled drug delivery system" supported by Korean Intellectual and Economy(KOIE) for 2004~2009. This project is composed by 5 subproject as (1) development of novel osmotic pump, (2) development of liposome delivery system, (3) development of DDS by bile acid transporter, (4) protein drug delivery system using thermo-sensitive hydrogel, and (5) development of novel transdermal drug delivery system. DDS system might be the core and platform technology for the application of diagnosis, bioinstrument, tissue engineering, regenerative medicine and pharmaceutical industries.
알긴산 나트륨이 장용코팅된 란소프라졸 제제의 저장안정성 및 용출률에 미치는 영향에 관한 연구
김정훈,오정민,강길선,정제교,이정식,정상영,이해방 한국약제학회 2002 Journal of Pharmaceutical Investigation Vol.32 No.4
Lansoprazole, pharmaceutics for acid-related diseases, is unstable in low pH environments and generally coated with enteric polymer to obtain gastroresistance in stomach. Because its storage stability is influenced by acidic substitutes of enteric polymer, alkaline chemicals were generally added to dosage form as a stabilizer. In this experience, we coated lansoprazole bead with sodium alginate and evaluated the effect of bead size and sodium alginate coating on the storage stability and dissolution profile of lansoprazole. Sodium alginate solution containing lansoprazole was sprayed as a droplet into 3% (w/v) CaCl_2 solution and the resultant bead was coated with starch, sodium alginate, and hydroxypropyl methylcellulose phthalate. The content of lansoprazole granule not coated with sodium alginate decreased to 57.96% of initial content when stored at a severe condition for 4 weeks, but that of lansoprazole granule coated with sodium alginate before enteric coating decreased little and as the thickness of sodium alginate film increased, the content of bead didn't decreased for 4 weeks. Sodium alginate film also improved the gastroresistance without much influencing the maximum dissolution rate.