Cyclodextrin pendant polymer as an efficient drug carrier for scutellarin

Area of Science:

• Polymer Chemistry
• Drug Delivery Systems
• Biomaterials Science

Background:

• Hydrophobic drugs often exhibit poor solubility, limiting their therapeutic efficacy.
• Cyclodextrins are known for their ability to encapsulate hydrophobic molecules.
• Poly(ε-lysine) (ε-PL) offers a biocompatible backbone for developing novel drug carriers.

Purpose of the Study:

• To synthesize and characterize a novel β-cyclodextrin pendant polymer (ε-PL-CD).
• To evaluate the potential of ε-PL-CD as a drug carrier for the hydrophobic drug scutellarin (SCU).
• To investigate the complexation of SCU with ε-PL-CD and its impact on solubility and anti-tumor activity.

Main Methods:

• Synthesis of ε-PL-CD via a two-step procedure.
• Characterization using photoluminescence spectroscopy, NMR (¹H and 2D), XRPD, TGA, particle size, and Zeta potential analysis.
• In vitro solubility tests and cell experiments to assess anti-tumor effects.

Main Results:

• Successfully synthesized ε-PL-CD with glycine-β-cyclodextrin side chains.
• Demonstrated significantly enhanced solubility of scutellarin (SCU) when complexed with ε-PL-CD compared to free SCU or SCU complexed with β-cyclodextrin.
• Observed a strong inhibitory effect of SCU:ε-PL-CD on tumor cell growth and invasion in vitro.

Conclusions:

• ε-PL-CD is a promising novel drug carrier material for hydrophobic drugs like SCU.
• The polymer effectively improves drug solubility and exhibits significant anti-cancer properties.
• This study provides valuable insights into the application of ε-PL-CD in drug delivery and cancer therapy.