Tailor-Made Magnetic Fe3O4@mTiO2 Microspheres with a Tunable Mesoporous Anatase Shell for Highly Selective and Effective Enrichment of Phosphopeptides
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- 2 April 2012
- journal article
- research article
- Published by American Chemical Society (ACS) in ACS Nano
- Vol. 6 (4), 3179-3188
- https://doi.org/10.1021/nn3009646
Abstract
Selective enrichment of phosphoproteins or phosphopeptides from complex mixtures is essential for MS-based phosphoproteomics, but still remains a challenge. In this article, we described an unprecedented approach to synthesize magnetic mesoporous Fe3O4@mTiO2 microspheres with a well-defined core/shell structure, a pure and highly crystalline TiO2 layer, high specific surface area (167.1 m2/g), large pore volume (0.45 cm3/g), appropriate and tunable pore size (8.6–16.4 nm), and high magnetic susceptibility. We investigated the applicability of Fe3O4@mTiO2 microspheres in a study of the selective enrichment of phosphopeptides. The experiment results demonstrated that the Fe3O4@mTiO2 possessed remarkable selectivity for phosphopeptides even at a very low molar ratio of phosphopeptides/non-phosphopeptides (1:1000), large enrichment capacity (as high as 225 mg/g, over 10 times as that of the Fe3O4@TiO2 microspheres), extreme sensitivity (the detection limit was at the fmol level), excellent speed (the enrichment can be completed in less than 5 min), and high recovery of phosphopeptides (as high as 93%). In addition, the high magnetic susceptibility allowed convenient separation of the target peptides by magnetic separation. These outstanding features give the Fe3O4@mTiO2 composite microspheres high benefit for mass spectrometric analysis of phosphopeptides.Keywords
This publication has 46 references indexed in Scilit:
- Synthesis and Growth Mechanism of Iron Oxide NanowhiskersNano Letters, 2011
- Mesoporous Biocompatible and Acid-Degradable Magnetic Colloidal Nanocrystal Clusters with Sustainable Stability and High Hydrophobic Drug Loading CapacityACS Nano, 2011
- Fluorescent-Magnetic-Biotargeting Multifunctional Nanobioprobes for Detecting and Isolating Multiple Types of Tumor CellsACS Nano, 2011
- Multifunctional Nanobeads Based on Quantum Dots and Magnetic Nanoparticles: Synthesis and Cancer Cell Targeting and SortingACS Nano, 2011
- Doxorubicin Loaded Magnetic Polymersomes: Theranostic Nanocarriers for MR Imaging and Magneto-ChemotherapyACS Nano, 2011
- Single-Domain Protein A-Engineered Magnetic Nanoparticles: Toward a Universal Strategy to Site-Specific Labeling of Antibodies for Targeted Detection of Tumor CellsACS Nano, 2010
- Magnetic nanoparticles: synthesis, functionalization, and applications in bioimaging and magnetic energy storageChemical Society Reviews, 2009
- Multifunctional Magnetic Nanoparticles: Design, Synthesis, and Biomedical ApplicationsAccounts of Chemical Research, 2009
- Nanoscaling Laws of Magnetic Nanoparticles and Their Applicabilities in Biomedical SciencesAccounts of Chemical Research, 2008
- Superparamagnetic High-Magnetization Microspheres with an Fe3O4@SiO2 Core and Perpendicularly Aligned Mesoporous SiO2 Shell for Removal of MicrocystinsJournal of the American Chemical Society, 2007