Amphiphilic phospholipid-iodinated polymer conjugates for bioimaging.

Area of Science:

• Polymer Chemistry
• Biomaterials Science
• Medical Imaging

Background:

• Development of advanced contrast agents is crucial for sensitive bioimaging.
• Existing agents may face limitations in radiopacity or biocompatibility.
• Macromolecular probes offer potential for enhanced imaging characteristics.

Purpose of the Study:

• To design and synthesize novel amphiphilic phospholipid-iodinated polymer conjugates.
• To evaluate their radiopacity and biocompatibility for bioimaging applications.
• To explore their potential as field-friendly contrast agents for point-of-care diagnostics.

Main Methods:

• Synthesis of conjugates via click chemistry between PEGylated phospholipids and iodinated polyesters.
• Characterization of self-assembly into vesicles or spiked vesicles.
• In vitro evaluation of radiopacity using X-ray measurements and biocompatibility via cell viability assays.

Main Results:

• Conjugates formed amphiphilic structures with hydrophobic and hydrophilic domains.
• Demonstrated high radiopacity with significant X-ray signal at 3.13 mg mL-1 iodine equivalent.
• Exhibited no cytotoxicity after 48-hour incubation with HEK and 3T3 cells at 20 μM concentration.

Conclusions:

• The synthesized macromolecular probes are highly radiopaque and biocompatible.
• These conjugates represent a promising new class of bioimaging contrast agents.
• Potential for development into sensitive, field-friendly agents for point-of-care diagnostics.