Water-Soluble Gd@C82-TEGs Nanoparticles as an MRI Contrast Agent

10 Apr 20264 min read0 viewsJournal Feed

GIST

by Wanyun Liu, Ping Huo, Xiuming Zhou, Dayan Xiong The water-soluble gadolinium fullerenes Gd@C 82 -TEGs nanoparticles as a novel magnetic resonance imaging (MRI) contrast agent were fabricated by the metal fullerenes Gd@C 82 assembled with tetraethylene glycol (TEG). The loading Gd amount in Gd@C 82 -TEGs nanoparticles was 8.0 wt%.

The average particle size of water-soluble Gd@C 82 -TEGs nanoparticles was 97 nm and the nanoparticles were uniformly spherical shape and had good dispersibility and no aggregation. The 97 nm spherical shape of Gd@C 82 -TEG nanoparticles ensured high relaxivity.

The proton relaxivity ( r 1 ) and transverse relaxivity ( r 2 ) were high up to 37.1 mM −1 ·s −1 and 64.9 mM −1 ·s −1 , which greater than that of commercial Magnevist under the same conditions. The Gd@C 82 -TEGs nanoparticles exhibited pronounced T 1 -weighted MRI in vitro .

The MRI signal-enhancing efficiency of Gd@C 82 -TEGs nanoparticles was superior to that of gadolinium diethylenetriamine pentaacetate Gd-DTPA (Magnevist).

Clinical Editorial

Study Design and Material Innovation

This report describes the fabrication of water-soluble gadolinium fullerenes, specifically Gd@C82-TEGs, formed by assembling Gd@C82 fullerenes with tetraethylene glycol ligands.
The authors report a gadolinium loading of 8.0 weight percent in the resulting nanoparticles.
Morphology and dispersibility are noted as uniform, spherical particles with an average diameter around 97 nm, exhibiting good dispersibility and no aggregation.

Magnetic Resonance Imaging Signal Characteristics

The nanoparticles demonstrated high proton relaxivity (r1) of 37.1 mM−1·s−1 and transverse relaxivity (r2) of 64.9 mM−1·s−1.
Under the described conditions, relaxivity values surpassed those of the clinical contrast agent Magnevist (gadolinium-DTPA).
In vitro, the Gd@C82-TEGs produced pronounced T1-weighted MRI signals, indicating strong signal enhancement relative to baseline material.

Comparative Effectiveness and Context

The MRI signal enhancement achieved with Gd@C82-TEGs was superior to that of Magnevist in the reported experiments.
The study emphasizes the potential of these nanoparticles as a contrast agent based on their higher relaxivity metrics and superior in vitro performance.

Biocompatibility and Safety Signals

Cellular assessments showed no significant impact on cell metabolism or structure.
Cell viability remained above 80%, interpreted as an absence of detectable cytotoxicity in the tested context.

Limitations and Unreported Aspects

The report provides in vitro findings and does not present in vivo data.
Specific experimental conditions, broader safety assessments, pharmacokinetics, and long-term effects are not described.