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Vesicles Comprising Dimethylaminopropyl Octadecanamide, Stearic Acid, and Carboxyhexadecyl Disulfide and Their Release Property under Reducing Condition
Biotechnology and Bioprocess Engineering ( IF 2.5 ) Pub Date : 2020-11-06 , DOI: 10.1007/s12257-019-0456-0
Jin Ah Kim , Jin-Chul Kim

Vesicles comprising dimethyl aminopropyl octadecanamide (DMAPODA), stearic acid (SA), and carboxyhexadecyl disulfide (CHDDS) were prepared as reduction-responsive carriers. Vesicular particles were found on TEM micrographs and the diameter fell within 100-400 nm. The hydrodynamic mean diameter increased with increasing the content of CHDDS. The zeta potential was lowered by the incorporation of CHDDS into the vesicular membrane. Vesicle whose DMAPODA/SA/ CHDDS molar ratio was 1/1/5 exhibited one endothermic peak around 50.9°C, indicating that the vesicular membrane was homogeneous in the composition. Strong signals were found in 500-540 cm-1 in the Raman spectrum of vesicles, suggesting that the disulfide lipid (i.e. CHDDS) was incorporated into the vesicular membranes. Vesicles containing CHDDS released rhodamine B in dithiothreitol (DTT, a reducing agent) concentration-dependent manner. The DTTsensitivity of the vesicles in terms of release was higher as the CHDDS content was higher.



中文翻译:

包含二甲基氨基丙基十八酰胺,硬脂酸和羧基十六烷基二硫化物的囊泡及其在还原条件下的释放性能

制备包含二甲基氨基丙基十八酰胺(DMAPODA),硬脂酸(SA)和羧基十六烷基二硫化物(CHDDS)的囊泡作为还原反应性载体。在TEM显微照片上发现了囊状颗粒,其直径落在100-400nm之内。流体动力学平均直径随CHDDS含量的增加而增加。通过将CHDDS掺入囊泡膜中来降低ζ电位。DMAPODA / SA / CHDDS摩尔比为1/1/5的囊泡在50.9℃附近显示一个吸热峰,表明该囊泡膜在组合物中是均匀的。在囊泡的拉曼光谱中,在500-540 cm -1处发现强信号,表明二硫化物脂质(CHDDS)合并到囊泡膜中。含有CHDDS的囊泡以二硫苏糖醇(DTT,还原剂)浓度依赖性方式释放若丹明B。随着CHDDS含量的增加,囊泡对释放的DTT敏感性更高。

更新日期:2020-11-06
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