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폴레이트-폴리(에틸렌 이민)-인지질 복합체가 도입된 리포솜에 의한 항암제의 세포흡수성향상
황태원 ( Tae Won Hwang ),한희동 ( Hee Dong Han ),서동환 ( Dong Hoan Seo ),성하수 ( Ha Soo Seong ),김중현 ( Jung Hyun Kim ),신병철 ( Byeong Chul Shin ) 한국조직공학과 재생의학회 2006 조직공학과 재생의학 Vol.3 No.2
Tumor-targeting liposomes that can enhance the intracellular uptake of the liposomes into tumor cells could lead to an improved therapeutic efficacy for the drugs. A new phospholipid derivative, folate-poly(ethylene imine)-1,2-distearoyl-sn-glycero-3-phosphoethanolamine (FPD), which can be incorporated into lipid bilayers of liposomes, was synthesized and the effect of FPD-incorporated liposomes on intracellular uptake into A549 tumor cells was investigated. While the particle size of FPD-liposomes increased with increase of FPD amount in lipid composition, the loading efficiency of anticancer drug, doxorubicin(DOX), into liposomes was FPD amount in lipid composition. DOX-loaded FPD-liposomes showed higher cytotoxicity against DOX-loaded DSPE-liposomes. Fluorescence microscopy and flow cytometry revealed that FPD-liposomes facilitated the DOX uptake into A549 lung carcinoma cells via folate receptor-mediated endocytosis. It was suggested that FPD-liposomes may be a promising carrier enhancement of intracellular uptake of anticancer drugs into tumor cells.
민안기,황태원,Min, Anki,Hwang, Tae-Won 한국군사과학기술학회 2015 한국군사과학기술학회지 Vol.18 No.2
An unmanned aerial photography method by using an unmanned helicopter is useful method for measuring of the water-entry traces of small falling objects into the sea. Pixel sizes on the aerial photograph may be too large due to a limit of camcorder resolution and a wide shooting area. If the pixel size is too large, identification of water-entry trace is impossible. Thus an accurate prediction of water-entry trace size is required. The traces of water-entry could be classified into three types such as splash, water column, and bubble. Diameters of each trace are predicted by water-entry impact pressure theories, cavity theories, and trial test results. The results are verified by drop tests using an unmanned helicopter at two water-entry speeds. As a result, prediction and test results showed sufficient similarity to evaluate the identifiability of water-entry trace.