Facile synthesis of ultra-small hollow manganese silicate nanoparticles as pH/GSH-responsive T1-MRI contrast agents
| Autor: | Jinyue Zhang, Longyi Jin, Yong Il Park, Bo Quan, Mingshi Jin |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Silicon Biocompatibility Process Chemistry and Technology technology industry and agriculture chemistry.chemical_element Nanoparticle 02 engineering and technology Polyethylene glycol Manganese 021001 nanoscience & nanotechnology 01 natural sciences Silicate Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound chemistry 0103 physical sciences Dispersion stability PEG ratio Materials Chemistry Ceramics and Composites 0210 nano-technology Nuclear chemistry |
| Zdroj: | Ceramics International. 46:18632-18638 |
| ISSN: | 0272-8842 |
| Popis: | Manganese silicate nanoparticles have recently attracted great attention due to the effectiveness of T1-weighted magnetic resonance imaging (MRI) contrast agents (CAs) in the mildly acidic and high glutathione (GSH) conditions of the tumor microenvironment. Herein, ultra-small hollow manganese silicate (UHMS) nanoparticles were prepared via a facile, economical, and eco-friendly method based on a hydrothermal process using small silica nanoparticles as both the silicon source and templates. The nanoparticles showed remarkable biocompatibility and dispersion stability after modification with polyethylene glycol (PEG). Owing to their ultra-high longitudinal relaxation rate (r1) at low pH values and high GSH levels, the UHMS@PEG nanoparticles have performed an excellent pH/GSH-responsive T1-weighted MRI. Meanwhile, the nanoparticles showed insignificant cytotoxicity in vitro and in vivo. Therefore, the UHMS@PEG nanoparticles show promise as T1-MRI CAs in the tumor microenvironment and may be used to assist in clinical cancer diagnosis. |
| Databáze: | OpenAIRE |
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