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Issue 40, 2012
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Ultrathin, bioresponsive and drug-functionalized protein capsules

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This paper presents a versatile approach for the synthesis of ultrathin (ca. 10 nm thickness) and bioresponsive protein capsules. The protein capsules are obtained after covalent cross-linking with Lomant's reagent of a single protein layer immobilized onto bromoisobutyramide-modified silica particles, followed by template removal. The combination of protein immobilization and cross-linking steps, affords protein capsules with enhanced mechanical stability and permits the formation of smaller capsule sizes (ca. 200 nm size) without loss of protein biofunctionality, as demonstrated through enzymatic catalysis experiments. Furthermore, we show the facile functionalization of these protein capsules with an anticancer drug, doxorubicin, which is releasable upon exposure to biological stimuli either via reductive cytosolic conditions or protease degradation. These bioresponsive and functionalized protein capsules are likely to have potential in cell targeting, and as drug delivery vehicles and biocatalysts.

Graphical abstract: Ultrathin, bioresponsive and drug-functionalized protein capsules

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Publication details

The article was received on 11 Jun 2012, accepted on 23 Aug 2012 and first published on 10 Sep 2012

Article type: Paper
DOI: 10.1039/C2JM33737A
Citation: J. Mater. Chem., 2012,22, 21434-21442

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    Ultrathin, bioresponsive and drug-functionalized protein capsules

    D. Mertz, H. Wu, J. S. Wong, J. Cui, P. Tan, R. Alles and F. Caruso, J. Mater. Chem., 2012, 22, 21434
    DOI: 10.1039/C2JM33737A

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