Controlling Cancer Cell Fate Using Localized Biocatalytic Self-Assembly of an Aromatic Carbohydrate Amphiphile
作者:Ricardo A. Pires、Yousef M. Abul-Haija、Diana S. Costa、Ramon Novoa-Carballal、Rui L. Reis、Rein V. Ulijn、Iva Pashkuleva
DOI:10.1021/ja5111893
日期:2015.1.21
We report on a simple carbohydrate amphiphile able to self-assemble into nanofibers upon enzymatic dephosphorylation. The self-assembly can be triggered by alkaline phosphatase (ALP) in solution or in situ by the ALP produced by osteosarcoma cell line, SaOs2. In the latter case, assembly and localized gelation occurs mainly on the cell surface. The gelation of the pericellular environment induces a
我们报告了一种简单的碳水化合物两亲物,能够在酶促脱磷酸化后自组装成纳米纤维。自组装可由溶液中的碱性磷酸酶 (ALP) 触发,或由骨肉瘤细胞系 SaOs2 产生的 ALP 原位触发。在后一种情况下,组装和局部凝胶化主要发生在细胞表面。细胞周围环境的凝胶化在初始阶段(≤7 小时)诱导 SaOs2 代谢活性降低,导致细胞在较长暴露时间(≥24 小时)时死亡。我们表明这种效应取决于磷酸酶浓度,因此,它是细胞选择性的,前软骨细胞 ATDC5(表达的 ALP 活性比 SaOs2 低约 15-20 倍)在浓度≤1 mM 时不受影响。