Pericellular Hydrogel/Nanonets Inhibit Cancer Cells |
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Authors: | Dr. Yi Kuang Junfeng Shi Jie Li Dan Yuan Kyle A. Alberti Prof. Qiaobing Xu Prof. Dr. Bing Xu |
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Affiliation: | 1. Department of Chemistry, Brandeis University, 415 South St, Waltham, MA 02454 (USA) http://people.brandeis.edu/~bxu;2. Department of Biomedical Engineering, Tufts University, 419 Boston Ave, Medford, MA 02155 (USA) |
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Abstract: | Fibrils formed by proteins are vital components for cells. However, selective formation of xenogenous nanofibrils of small molecules on mammalian cells has yet to be observed. Here we report an unexpected observation of hydrogel/nanonets of a small D ‐peptide derivative in pericellular space. Surface and secretory phosphatases dephosphorylate a precursor of a hydrogelator to trigger the self‐assembly of the hydrogelator and to result in pericellular hydrogel/nanonets selectively around the cancer cells that overexpress phosphatases. Cell‐based assays confirm that the pericellular hydrogel/nanonets block cellular mass exchange to induce apoptosis of cancer cells, including multidrug‐resistance (MDR) cancer cells, MES‐SA/Dx5. Pericellular hydrogel/nanonets of small molecules to exhibit distinct functions illustrates a fundamentally new way to engineer molecular assemblies spatiotemporally in cellular microenvironment for inhibiting cancer cell growth and even metastasis. |
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Keywords: | cancer hydrogel inhibition nanofibrils pericellular space |
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