Characterization of iopromide liposomes

Area of Science:

• Nanotechnology in medical imaging
• Pharmaceutical sciences
• Radiocontrast agents

Background:

• Liposomes offer a versatile platform for drug delivery and imaging agent encapsulation.
• Iopromide is a widely used iodinated contrast agent for medical imaging.

Purpose of the Study:

• To prepare and characterize iopromide-loaded liposomes for pharmaceutical and biological properties.
• To evaluate the safety and efficacy of these liposomes for computed tomography (CT) imaging.

Main Methods:

• Liposomes prepared via ethanol evaporation method.
• Characterization included size, encapsulation efficiency, and stability studies.
• Toxicity, cardiovascular tolerance, pharmacokinetics, and CT imaging efficiency were assessed in animal models (mice, rats, rabbits).

Main Results:

• Liposomes exhibited a mean diameter of 0.5 ± 0.1 micron with 30-40% encapsulation efficiency.
• Demonstrated stability in plasma for ~24 hours, with high LD50 values indicating low acute toxicity.
• Subchronic toxicity studies showed no adverse effects.
• Dose-dependent pharmacokinetics with renal excretion.
• Effective liver enhancement achieved at clinically relevant iodine doses.

Conclusions:

• Iopromide-loaded liposomes are well-tolerated in preclinical animal studies.
• These liposomes show promise as a safe and effective agent for liver imaging using CT.