Pharmaceutical Research

, Volume 27, Issue 9, pp 1884–1892

Dextran Gadolinium Complexes as Contrast Agents for Magnetic Resonance Imaging to Sentinel Lymph Nodes

  • Guo-Ping Yan
  • Wei Xu
  • Lian Yang
  • Liang Li
  • Fan Liu
  • Qing-Zhong Guo
Research Paper

ABSTRACT

Purpose

The aim was to investigate three dextran gadolinium complexes Dextran-DTPA-Gd as the potential MRI contrast agents in lymphatic system.

Methods

Three dextran gadolinium complexes Dextran-DTPA-Gd containing differing amounts of Gd-DTPA were synthesized by the incorporation of Gd-DTPA to the hydroxyl groups of dextran. These dextran ligands and gadolinium complexes were characterized, and their properties in vitro and in vivo were also evaluated.

Results

Dextran-DTPA-Gd demonstrated obviously higher relaxation effectiveness than that of Gd-DTPA. The result of in vitro cytotoxicity assay showed that these macromolecular ligands and their corresponding gadolinium complexes had low cytotoxicity to HeLa cells. Dextran-DTPA-Gd greatly enhanced the contrast of MR images of normal politeal lymph nodes and reactive hyperplasia of politeal lymph nodes in rabbits and provided prolonged duration in lymphatic system with lower injection doses than that of Gd-DTPA. However, Dextran-DTPA-Gd displayed low signal enhancements in MR images of politeal lymph nodes with VX2 carcinoma in rabbits during the detection time.

Conclusions

These dextran gadolinium complexes Dextran-DTPA-Gd can be taken up selectively by lymphatic system and showed the potential as MRI contrast agents in lymphatic system.

KEY WORDS

magnetic resonance imaging (MRI) contrast agents gadolinium complexes dextran politeal lymph nodes 

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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • Guo-Ping Yan
    • 1
  • Wei Xu
    • 1
  • Lian Yang
    • 2
  • Liang Li
    • 1
  • Fan Liu
    • 1
  • Qing-Zhong Guo
    • 1
  1. 1.School of Material Science and EngineeringWuhan Institute of TechnologyWuhanChina
  2. 2.Center for Magnetic Resonance Imaging of Union Hospital Tongji Medical CollegeHuazhong University of Science and TechnologyWuhanChina

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