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자료유형
학술저널
저자정보
저널정보
한국미생물생명공학회 Journal of Microbiology and Biotechnology Journal of Microbiology and Biotechnology 제16권 제9호
발행연도
2006.1
수록면
1,369 - 1,376 (8page)

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Self-organized nanogels were prepared frompullulan/biotin conjugates (PU/Bio) for the development ofan effective anticancer drug delivery system. The degree ofbiotin substitution was 1, 19, and 24 biotin groups perproperties of the nanogels (PU/Bio1, 2 and 3) in aqueousmedia were characterized by dynamic light scatering,transmission electron microscopy, and fluorescence spectroscopy.The mean diameter of al the samples was less than 30 nmwith a unimodal size distribution. The critical agregationconcentrations (CACs) of the nanoparticles in distilled waterwere 2.8×10-2, 1.6×10-2, and 0.7×10-2 mg/ml for the PU/Bio1, 2, and 3, respectively. The aggregation behavior of thenanogels indicated that biotin can perform as a hydrophobicmoiety. To observe the specific interaction with a hepaticcarcinoma cell line (HepG2), the conjugates were labeledwith rhodamine B isothiocyanate (RITC) and their intensitiesmeasured using a fluorescence microplate reader. The HepG2cells treated with the fluorescence-labeled PU/Bio nanoparticleswere strongly luminated compared with the control (pullulan).the PU/Bio nanogels into the cancer cels. Such resultsdemonstrated that the biotin in the conjugate acted as both ahydrophobic moiety for self-assembly and a tumor-targetingmoiety for specific interaction with tumor cells. Consequently,PU/Bio nanogels would appear to be a useful drug carrier forthe treatment of liver cancer.

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