Synthesis and functionalization of dextran-based single-chain nanoparticles in aqueous media

Area of Science:

• Biomaterials Science
• Nanotechnology
• Medical Imaging

Background:

• Developing biocompatible nanoparticles for medical applications is crucial.
• Dextran-based nanoparticles offer tunable properties for drug delivery and imaging.
• Efficient methods for nanoparticle preparation and characterization are needed.

Purpose of the Study:

• To prepare water-dispersible dextran-based single-chain polymer nanoparticles (SCPNs) under mild conditions.
• To evaluate the potential of radiolabeled SCPNs as imaging agents for lung deposition studies.
• To demonstrate the utility of SPECT imaging for tracking nanoparticle behavior in vivo.

Main Methods:

• Synthesis of dextran-based single-chain polymer nanoparticles (SCPNs) in aqueous media.
• Radiolabeling of the prepared biocompatible SCPNs.
• Intratracheal nebulization of aqueous aerosolized SCPNs in a preclinical model.
• Assessment of lung deposition using single-photon emission computed tomography (SPECT) imaging.

Main Results:

• Successfully synthesized water-dispersible dextran-based SCPNs under mild, aqueous conditions.
• Demonstrated successful radiolabeling of the SCPNs, preserving their structural integrity.
• Utilized SPECT imaging to visualize and quantify the lung deposition of aerosolized SCPNs.
• Confirmed the potential of these SCPNs as effective imaging contrast agents for lung studies.

Conclusions:

• Dextran-based SCPNs can be prepared efficiently in water under mild conditions.
• Radiolabeled SCPNs are suitable for tracking aerosol deposition in the lungs using SPECT.
• These findings highlight the promise of SCPNs as biocompatible imaging agents for pulmonary applications.