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Polyiodinated triglyceride analogs as potential computed tomography imaging agents for the liver
J P Weichert1, M A Longino, D A Bakan
1Department of Radiology, University of Michigan Medical Center, Ann Arbor 48109.
Journal of Medicinal Chemistry
|February 17, 1995
Summary
New triglyceride analogs show selective liver uptake for computed tomography imaging. These compounds offer potential for detailed liver lesion and disease evaluation.
Area of Science:
- Radiochemistry
- Medical Imaging
- Organic Synthesis
Background:
- Computed tomography (CT) requires effective hepatographic agents for detailed liver imaging.
- Developing agents that selectively target liver tissue is crucial for diagnostic accuracy.
Purpose of the Study:
- To synthesize and evaluate novel glyceryl alkanoate analogs for liver-specific CT imaging.
- To assess the biodistribution and liver uptake of these potential hepatographic agents.
Main Methods:
- Synthesis of seven glyceryl 2-oleoyl 1,3-bis[omega-(3-amino-2,4,6-triiodophenyl)] alkanoate analogs.
- Radioiodination with iodine-125 and emulsification for administration.
- Evaluation of liver uptake and distribution in vivo.
Main Results:
- All seven analogs demonstrated rapid and significant liver accumulation (65-78% injected dose by 30 min).
- High liver-to-blood ratios (21-450) were observed at 3 hours post-injection.
- Faster liver elimination correlated with longer alkyl chain lengths in the analogs.
Conclusions:
- The synthesized triglyceride analogs exhibit excellent liver localization properties for CT imaging.
- Their biochemical similarity to natural triglycerides suggests broad applicability for liver lesion and diffuse disease assessment.
- These agents hold promise for enhancing the diagnosis of hepatic conditions.