Hydrogels with reversible chemical environments for in vitro cell culture

Hydrogels with reversible chemical environments for in vitro cell culture
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用于体外细胞培养的具有可逆化学环境的水凝胶

DOI:
10.1088/1748-605x/aab45d
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发表时间:
2018
影响因子:
4
通讯作者:
Ryan G. Wylie
Ryan G. Wylie
中科院分区:
工程技术3区
文献类型:
--
作者:
C. Lambert;Devang Nijsure;V. Huynh;Ryan G. Wylie

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可逆地控制水凝胶的化学环境的方法可应用于三维细胞培养,以研究在更能代表体内环境的环境中的细胞增殖、迁移和分化。在此,我们开发了一种通过非共价连接肽基序来暂时控制琼脂糖水凝胶的化学环境的方法。通过脱硫生物素-链霉亲和素相互作用(KD 10−11 M),将链霉亲和素-GRGDS偶联物固定在脱硫生物素修饰的琼脂糖水凝胶中。然后通过加入生物素将链霉亲和素-GRGDS从凝胶中置换出来,生物素对链霉亲和素具有更高的亲和力(KD 10−15 M)。重复该过程以在数小时至数周的过程中顺序地和同时地将不同的生物分子和模型化合物包埋在水凝胶中。动态化学环境对细胞活性的影响通过监测HUVEC管形成30 h来证明。
Methods to reversibly control the chemical environment of hydrogels have application in three-dimensional cell culture to study cell proliferation, migration and differentiation in environments more representative of in vivo environments. Herein, we have developed a method to temporally control the chemical environment of agarose hydrogels through non-covalent attachment of peptide motifs. Streptavidin-GRGDS conjugates were immobilized in desthiobiotin-modified agarose hydrogels through the desthiobiotin–streptavidin interaction (KD 10−11 M). Streptavidin-GRGDS was then displaced from the gel by the addition of biotin, which has a higher affinity for streptavidin (KD 10−15 M). This process was repeated to sequentially and simultaneously immobilize different biomolecules and model compounds in hydrogels over the course of several hours to weeks. The influence of dynamic chemical environments on cellular activity was demonstrated by monitoring HUVEC tube formation for 30 h.
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