Encapsulation studies and selective membrane permeability properties of self-assembly hollow nanospheres

被引:15
|
作者
Ha, Wei [2 ,3 ]
Meng, Xian-Wei [1 ]
Li, Quan [2 ]
Fan, Min-Min [1 ]
Peng, Shu-Lin [2 ]
Ding, Li-Sheng [2 ]
Tian, Xuan [3 ]
Zhang, Sheng [1 ]
Li, Bang-Jing [2 ]
机构
[1] Sichuan Univ, State Key Lab Polymer Mat Engn, Polymer Res Inst, Chengdu 610065, Peoples R China
[2] Chinese Acad Sci, Key Lab Mt Ecol Restorat & Bioresource Utilizat, Chengdu Inst Biol, Chengdu 610041, Peoples R China
[3] Lanzhou Univ, State Key Lab Appl Organ Chem, Coll Chem & Chem Engn, Lanzhou 730000, Peoples R China
基金
中国国家自然科学基金;
关键词
SIZE-EXCLUSION CHROMATOGRAPHY; COIL BLOCK-COPOLYMERS; HUMAN SERUM-ALBUMIN; ALPHA-CYCLODEXTRIN; POLY(ETHYLENE GLYCOL); COMMON SOLVENT; SPHERES; ALGINATE; POLY(EPSILON-CAPROLACTONE); MICELLES;
D O I
10.1039/c0sm00896f
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
This paper presents a kind of self-assembled hollow nanosphere for enzyme encapsulation. The enzyme molecules were encapsulated in hollow spheres directly in aqueous solution through the self-assembly of rod-coil Alg-g-PEG and alpha-CDs complexes. These Alg-g-PEG/alpha-CD hollow spheres showed semi-permeability which could prevent big enzyme molecules from leaving while allowing small substrates and products to pass through to maintain the enzyme activity. The permeability properties of Alg-g-PEG/alpha-CD hollow nanospheres were investigated by encapsulating different probes. The results showed that the molar mass cutoff (MMCO) of these hollow nanospheres was between 20 and 40 kDa. The encapsulation capability of Alg-g-PEG/alpha-CD hollow nanospheres was also investigated, the results indicated a maximal values for L-asparaginase encapsulation. Furthermore, the encapsulation behavior for L-asparaginase showed PEG graft density (GD) dependence.
引用
收藏
页码:1018 / 1024
页数:7
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