Law Benedict, Weissleder Ralph, Tung Ching-Hsuan
Center for Molecular Imaging Research, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA.
Bioconjug Chem. 2007 Nov-Dec;18(6):1701-4. doi: 10.1021/bc070054z. Epub 2007 Oct 5.
We report the design and synthesis of enzyme-responsive nanofibers. The fibers are composed of self-assembled hydrophobic beta-sheet peptides incorporating protease-sensitive domains, fluorescent reporters, and hydrophilic poly(ethylene glycol) (PEG) units. Using urokinase plasminogen activator (uPA) as a model system, nanofibers were developed to release fluorescent fragments upon uPA incubation. These protease-sensitive nanofibers may have considerable biomedical applications as diagnostic sensors or for protease-assisted drug deliveries.
我们报告了酶响应性纳米纤维的设计与合成。这些纤维由自组装的疏水β-折叠肽组成,其中包含蛋白酶敏感结构域、荧光报告基团和亲水性聚乙二醇(PEG)单元。以尿激酶型纤溶酶原激活剂(uPA)作为模型系统,开发出了纳米纤维,使其在与uPA孵育时释放荧光片段。这些蛋白酶敏感的纳米纤维作为诊断传感器或用于蛋白酶辅助药物递送可能具有相当大的生物医学应用价值。