Fructose-Based Single-Chain Polymer Nanoparticles for GLUT1-Mediated Delivery: Impact of Polymer Design on Uptake and...

Area of Science:

• Biomaterials Science
• Nanotechnology
• Drug Delivery

Background:

• Single-chain nanoparticles (SCNPs) offer unique architectures for biological applications.
• Understanding the impact of block arrangement in SC Ns is crucial for optimizing cellular uptake and biodistribution.
• Glucose transporters (GLUTs) are key targets for enhancing nanoparticle interactions with cells.

Purpose of the Study:

• To synthesize and biologically evaluate head-tail, tadpole-like SC Ns with varying block arrangements.
• To investigate the influence of PEG-head versus fructose-rich head (Fru-head) configurations on cellular uptake.
• To determine the biodistribution and pharmacokinetic profiles of these novel SC NPs in vivo.

Main Methods:

• Preparation of two SC NP libraries: PEG-head and Fru-head configurations.
• In vitro cellular uptake studies using cancer cell lines (MDA-MB-231, MCF-7) and immune cells (RAW 264.7).
• In vivo pharmacokinetic studies in animal models to assess blood circulation time and clearance.

Main Results:

• Fru-head SC Ns demonstrated significantly higher cellular uptake compared to PEG-head SC Ns.
• Uptake selectivity correlated with glucose transporter (GLUT) expression levels across different cell types.
• Fru-head SC Ns exhibited prolonged blood circulation (approx. 21 h MRT) and reduced in vivo clearance.

Conclusions:

• The surface accessibility of fructose moieties in Fru-head SC Ns enhances cellular uptake via GLUT interactions.
• SC NP design, specifically the head group composition, critically influences cellular targeting and biodistribution.
• Tadpole-like SC NPs with optimized block arrangements show promise for improved drug delivery systems.