Tantalum oxide nanoparticles for the imaging of articular cartilage using X-ray computed tomography: visualization of ex vivo/in vivo murine tibia and ex vivo human index finger cartilage.
Angew Chem Int Ed Engl
; 53(32): 8406-10, 2014 Aug 04.
Article
en En
| MEDLINE
| ID: mdl-24981730
ABSTRACT
The synthesis and characterization of tantalum oxide (Ta2O5) nanoparticles (NPs) as new X-ray contrast media for microcomputed tomography (µCT) imaging of articular cartilage are reported. NPs, approximately 5-10â
nm in size, and possessing distinct surface charges, were synthesized using phosphonate (neutral), ammonium (cationic), and carboxylate (anionic) ligands as end functional groups. Assessment of a cartilage defect in a human cadaver distal metacarpophalangeal (MCP) joint with the ammonium nanoparticles showed good visualization of damage and preferential uptake in areas surrounding the defect. Finally, an optimized nontoxic cationic NP contrast agent was evaluated in an inâ
vivo murine model and the cartilage was imaged. These nanoparticles represent a new type of contrast agent for imaging articular cartilage, and the results demonstrate the importance of surface charge in the design of nanoparticulate agents for targeting the surface or interior zones of articular cartilage.
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Texto completo:
1
Base de datos:
MEDLINE
Asunto principal:
Óxidos
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Tantalio
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Tibia
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Tomografía Computarizada por Rayos X
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Dedos
Idioma:
En
Revista:
Angew Chem Int Ed Engl
Año:
2014
Tipo del documento:
Article