A Microgel Construction Kit for Bioorthogonal Encapsulation and pH-Controlled Release of Living Cells
作者:Dirk Steinhilber、Torsten Rossow、Stefanie Wedepohl、Florian Paulus、Sebastian Seiffert、Rainer Haag
DOI:10.1002/anie.201308005
日期:2013.12.16
control of the microgel degradation kinetics in the interesting pH range between 4.5 and 7.4. By this means, a pH‐controlled release of the encapsulated cells was achieved upon demand with no effect on cell viability and spreading. As a result, the microgel particles can be used for temporary cell encapsulation, allowing the cells to be studied and manipulated during the encapsulation and then be isolated
通过将生物正交应变促进的叠氮化物-炔烃环加成反应(SPAAC)和基于液滴的微流控相结合,制备了具有出色的长期生存能力的pH值可裂解的充满细胞的微凝胶。聚(乙二醇)二环辛炔和树状聚(甘油叠氮化物)用作生物惰性水凝胶前体。使用不同的取代酸不稳定的苯乙缩醛连接基进行叠氮化物偶联,该连接基可在4.5至7.4的有趣pH范围内精确控制微凝胶的降解动力学。通过这种方法,可以在需要时实现pH值控制的包封细胞的释放,而对细胞活力和扩散没有影响。结果,微凝胶颗粒可用于临时细胞封装,