Facile, efficient approach to accomplish tunable chemistries and variable biodistributions for shell cross-linked...

Area of Science:

• Nanomedicine
• Materials Science
• Biotechnology

Background:

• Shell cross-linked knedel-like (SCK) nanoparticles offer tunable properties for drug delivery.
• Controlling nanoparticle pharmacokinetics is crucial for effective nanomedicine.
• Poly(ethylene glycol) (PEG)ylation is a common strategy to modify nanoparticle behavior in vivo.

Purpose of the Study:

• To investigate the in vivo behavior of SCK nanoparticles.
• To demonstrate the tunability of SCK nanoparticle pharmacokinetics.
• To establish SCKs as versatile nanoscale carriers for nanomedicine.

Main Methods:

• Grafting varied numbers of methoxy-terminated poly(ethylene glycol) (mPEG) chains to block copolymer precursors.
• Self-assembly into block copolymer micelles followed by chemical cross-linking.
• (64)Cu-radiolabeling for in vivo evaluation using biodistribution and positron emission tomography (PET).

Main Results:

• The blood retention of PEGylated SCKs was successfully tuned by altering mPEG grafting density.
• Nanoparticle surface properties influenced in vivo behavior.
• A semiquantitative model was developed to correlate mPEG surface coverage with in vivo performance.

Conclusions:

• SCK nanoparticle in vivo behavior is tunable through controlled PEGylation.
• SCKs are attractive and versatile nanoscale carriers for nanomedicine.
• Understanding surface properties enhances the application of SCKs in drug delivery and imaging.