期刊
ACS APPLIED BIO MATERIALS
卷 2, 期 5, 页码 2185-2191出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsabm.9b00160
关键词
peptide self-assembly; artificial enzyme; colorimetric detection; ROS scavenging; epithelial-mesenchymal transition
资金
- National Natural Science Foundation of China [21521005, 201874005]
- Fundamental Research Funds for the Central Universities [PYBZ1821, XK1901]
A new hybrid nanoparticle (NP; fluorenylme-thoxycarbonyl-arginine-glycine-aspartate and hemin, Fmoc-RGD/hemin NP) was developed for the simultaneous detection and inhibition of breast cancer cells. Hemin can regulate the reactive oxygen species (ROS), while Fmoc-RGD acts as a scaffold for hemin nanocrystallization. Fmoc groups interact with the porphyrin groups of hemin through hydrophobic and pi-pi interactions to form a hydrophobic core of the NPs. The hydrophilic RGD chains surround the core to maintain the stability of the nanoparticles in an aqueous medium. The RGD groups of Fmoc-RGD are also selective for tumor cells. This interaction can be exploited to enhance the selectivity of tumor detection. Based on enhanced peroxidase activity, Fmoc-RGD/hemin NPs were developed as signal transducers in a facile and fast point-of-care cancer diagnosis platform. This platform is sensitive to breast cancer cells and hydrogen peroxide (H2O2), a biomarker for breast cancer. In addition, these Fmoc-RGD/hemin NPs can be used as nanoscavengers for ROS and for regulating the redox status of cancer cells. They also exhibit a targeted inhibitory effect on the epithelial-mesenchymal transition (EMT). The peptide-tuned self-assembly of Fmoc-RGD/hemin NPs as functional artificial enzymes boasts simple preparation, biofriendliness, and the versatility required for on-demand therapeutics and diagnostics for metastatic cancer cells. These NPs can therefore be used as effective tools for potential applications in medicine and biotechnology.
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