Functionalized polymeric liposomes. Efficient immobilization of alpha chymotrypsin

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Bioconjugation Chemistry

Background:

• Phospholipids are key components of biological membranes.
• Vesicles formed from phospholipids are utilized in drug delivery and biomimetic systems.
• Functionalizing vesicles for biomolecule conjugation remains a challenge.

Purpose of the Study:

• To synthesize a novel polymerizable phospholipid with a latent aldehyde functionality.
• To create photopolymerized vesicles for efficient biomolecule conjugation.
• To conjugate alpha-chymotrypsin to these functionalized vesicles and assess enzyme activity.

Main Methods:

• Synthesis of a phosphatidylcholine derivative with a latent aldehyde in the head group.
• Photopolymerization of the synthesized phospholipid to form vesicles.
• Conjugation of alpha-chymotrypsin to the photopolymerized vesicles.
• Enzymatic activity assays to determine protein retention and function.

Main Results:

• Successful synthesis of the polymerizable phospholipid with a latent aldehyde moiety.
• Formation of stable, photopolymerized vesicles from the modified phosphatidylcholine.
• High-efficiency conjugation of alpha-chymotrypsin to the vesicle surface.
• Significant retention of enzymatic activity post-conjugation.

Conclusions:

• The novel polymerizable phospholipid enables the creation of functionalized vesicles.
• Photopolymerized vesicles offer a robust platform for enzyme immobilization.
• This approach facilitates high-density loading of enzymes while preserving their activity.