Bioorthogonal layer-by-layer encapsulation of pancreatic islets via hyperbranched polymers.

Bioorthogonal layer-by-layer encapsulation of pancreatic islets via hyperbranched polymers.
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通过超支聚合物对胰岛的生物正交分层封装。

DOI:
10.1021/am401981g
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发表时间:
2013-10-23
影响因子:
9.5
通讯作者:
Stabler, Cherie L.
Stabler, Cherie L.
中科院分区:
材料科学2区
文献类型:
--
作者:
Gattas-Asfura, Kerim M.;Stabler, Cherie L.

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通过一层接一层的聚合物组装将活组织包裹起来,为细胞表面工程提供了一个通用的平台,可以在纳米尺度上控制胶囊的特性。在此,我们报告了一种基于超支化聚合物的超薄胶囊结构的发展,该结构具有生物正交功能和定制的物理化学性质。基于碳二亚胺的3,5-二羧基苯甘氨酸酰胺在海藻酸盐上的随机缩合得到了具有多个,空间受限且易于功能化的末端羧酸基团的高支化多糖。利用聚乙二醇(PEG)将叠氮末端基团连接到结构藻酸盐上。与磷化氢功能化聚胺胺(PAMAM)树状大分子一起,通过Staudinger连接共价稳定的纳米级涂层被组装在固体表面和胰岛上。研究了静电和/或生物正交共价层间相互作用对涂层效率和稳定性以及胰岛活力和功能的影响。这些超支化聚合物为在活细胞和组织上形成共价稳定的超薄涂层提供了一个灵活的平台。此外,聚合物的超支化性质呈现出高度功能化的表面,能够对额外的生物活性或标记基序进行生物正交共轭。
The encapsulation of viable tissues via layer-by-layer polymer assembly provides a versatile platform for cell surface engineering, with nanoscale control over capsule properties. Herein, we report the development of a hyperbranched polymer-based, ultrathin capsule architecture expressing bioorthogonal functionality and tailored physiochemical properties. Random carbodiimide-based condensation of 3,5-dicarboxyphenyl glycineamide on alginate yielded a highly branched polysaccharide with multiple, spatially restricted, and readily functionalizable terminal carboxylate moieties. Poly(ethylene glycol) (PEG) was utilized to link azido end groups to the structured alginate. Together with phosphine functionalized poly(amido amine) (PAMAM) dendrimer, nanoscale layer-by-layer coatings, covalently stabilized via Staudinger ligation, were assembled onto solid surfaces and pancreatic islets. The effects of electrostatic and/or bioorthogonal covalent interlayer interactions on the resulting coating efficiency and stability, as well as pancreatic islet viability and function, were studied. These hyperbranched polymers provide a flexible platform for the formation of covalently stabilized ultrathin coatings on viable cells and tissues. In addition, the hyperbranched nature of the polymers presents a highly functionalized surface capable of bioorthogonal conjugation of additional bioactive or labeling motifs.
DOI: 10.1002/jbm.a.33162
发表时间: 2011-10
影响因子: 4.9
作者:
Gattas-Asfura, Kerim M.;Fraker, Christopher A.;Stabler, Cherie L.
通讯作者: Stabler, Cherie L.
DOI: 10.1021/ja063043
发表时间: 2006-07-26
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DOI: 10.1016/s0021-9673(03)00433-3
发表时间: 2003-08-15
影响因子: 4.1
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DOI: 10.1016/0021-9673(92)85088-b
发表时间: 1992-02-21
期刊: JOURNAL OF CHROMATOGRAPHY
影响因子: --
作者:
DOLLINGER, G;CUNICO, B;JONES, R
通讯作者: JONES, R
DOI: 10.1073/pnas.1113560109
发表时间: 2012-03-13
影响因子: 11.1
作者:
Pedraza, Eileen;Coronel, Maria M.;Stabler, Cherie L.
通讯作者: Stabler, Cherie L.