Thermo-Controlled in Situ Phase Transition of Polymer–Peptides on Cell Surfaces for High-Performance Proliferative Inhibition

详细信息    查看全文

• 作者：Sheng-Lin Qiao ; Yi Wang ; Yao-Xin Lin ; Hong-Wei An ; Yang Ma ; Li-Li Li ; Lei Wang ; Hao Wang
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：July 13, 2016
• 年：2016
• 卷：8
• 期：27
• 页码：17016-17022
• 全文大小：513K
• 年卷期：0
• ISSN：1944-8252

文摘

We herein report a thermocontrolled strategy for realizing in situ conformational transition of polymer–peptide conjugates at cell surfaces to manipulate and monitor HER2 receptor clustering, which finally result in effective breast cancer cell proliferation inhibition. Functional paring motifs (HBP) are covalently linked to a synthetic thermoresponsive polymer PNIPAAm to incorporate temperature control properties to HER2 targeting peptide. At 40 °C, the PNIPAAm polymers collapse and act as a “shield” to block the aggregation of HBP. Upon cooling to 35 °C, polymers are in their extended state and HBP are expose in aqueous and aggregate subsequently with enhanced fluorescence, allowing for promoting and in situ monitoring of receptor clustering. Ultimately, HER2 receptor clustering leads to cytoplasmic domain phosphorylation, which further results in effective cancer cell proliferation inhibition. We envision that this useful approach has the potential to be applied for molecule-targeted tumor therapy.