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Molecular and supramolecular routes to enhance Gadolinium-based contrast agents relaxivity: How far are we from the theoretical optimalvalue?

  • 0Department of Molecular Biotechnologies and Health Science, Molecular Imaging Center, University of Turin, Turin, Italy.
European Journal of Medicinal Chemistry +

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April 27, 2025

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April 27, 2025

View abstract on PubMed

Summary

This summary is machine-generated.

Gadolinium Based Contrast Agents (GBCAs) enhance MRI diagnostics by increasing water proton relaxation rates. Understanding molecular properties allows for designing highly efficient GBCAs for improved medical imaging.

Area Of Science

  • Magnetic Resonance Imaging (MRI)
  • Medical Imaging
  • Radiology

Background

  • Gadolinium Based Contrast Agents (GBCAs) are essential for enhancing MRI diagnostic capabilities.
  • GBCA efficacy relies on their ability to increase the relaxation rate of water protons, quantified by relaxivity.
  • Relaxivity is influenced by structural, electronic, and dynamic properties of the GBCA molecule.

Purpose Of The Study

  • To elucidate the key determinants of GBCA relaxivity.
  • To explore the potential of confined environments for developing high-relaxivity agents.
  • To guide the rational design of next-generation MRI contrast agents.

Main Methods

  • Correlation of experimental relaxivity values with molecular properties based on paramagnetic relaxation theory.
  • Analysis of factors such as water coordination, distance to Gd3+ ion, electronic relaxation, molecular reorientation, and water exchange rates.
  • Investigation of GBCAs within confined environments.

Main Results

  • Established theory allows correlation of relaxivity with specific molecular properties.
  • Certain GBCAs exhibit exceptional relaxivity not fully explained by current theory.
  • Confined environments show promise for developing high-relaxivity agents.

Conclusions

  • In-depth understanding of relaxivity determinants enables the design of highly efficient GBCAs.
  • Optimization of in vivo stability and biodistribution is crucial for effective GBCAs.
  • This knowledge is vital for advancing MRI contrast agents and Molecular Imaging.

Keywords:

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