Recombination of nanometric vesicles during freeze-drying

被引:11
作者
Cabane, B
Blanchon, S
Neves, C
机构
[1] PMMH, ESPCI, F-75231 Paris 05, France
[2] Paris Res Ctr, Dept Pharmaceut Sci, F-94400 Vitry Sur Seine, France
关键词
D O I
10.1021/la051923g
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Concentrated dispersions of nanometric lipid vesicles (mean diameter 20 nm) in water/maltose solutions have been freeze-dried and then redispersed in water, yielding again dispersions of lipid vesicles. At each stage of the freeze-drying process, the organization of the vesicles in the dispersion and their size distribution were examined through small-angle neutron scattering and gel permeation chromatography. It was found that the osmotic deswelling of the vesicles caused them to recombine into larger vesicles. A single burst of recombination events occurred when the maltose concentration in the aqueous phase rose above 100 g/L. The final vesicle population was monopopulated, with a central diameter about twice as large as that of the original dispersion.
引用
收藏
页码:1982 / 1990
页数:9
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