Recyclable Cu(i)/melanin dots for cycloaddition, bioconjugation and cell labelling.
Recyclable Cu(i)/melanin dots for cycloaddition, bioconjugation and cell labelling.
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DOI:
10.1039/c6sc01536k
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发表时间:
2016-09-01
期刊:
影响因子:
8.4
通讯作者:
Cheng Z
中科院分区:
文献类型:
--
作者:
Sun Y;Hong S;Ma X;Cheng K;Wang J;Zhang Z;Yang M;Jiang Y;Hong X;Cheng Z
We successfully transferred melanin into a novel catalytic platform. Ligand-free, water-soluble, recyclable and biocompatible Cu(i)-loaded melanin dots [Cu(i)/M-dots] was easily prepared and demonstrate excellent properties for classic CuAAC, bioconjugation and cell labelling. Development of biocompatible and high-performance heterogeneous catalysts for bioconjugation and cell labeling is highly challenging. Melanin has previously been used as a target for melanoma imaging and therapy. Herein, this important biomarker was transferred into a novel catalytic platform. A biocompatible Cu(i)/melanin dot-based catalyst [Cu(i)/M-dots] was easily prepared and exhibited high catalytic activity and excellent reusability in various Cu(i)-catalyzed azide-alkyne cycloadditions (CuAAC). Furthermore, DNA bioconjugation was carried out efficiently using Cu(i)/M-dots under ligand-free and reductant-free conditions, and the Cu(i)/M-dots could easily be removed by centrifugation. Lastly, the integrin receptor (alkyne RGD targeted) of U87MG cells was effectively labelled with a fluorescent dye (Cyanine5.5 azide) in combination with Cu(i)/M-dots. These attractive properties of Cu(i)/M-dots render it a promising catalytic platform in bioconjugation and chemical biology applications.
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