Description
General Description
PLGA-PEG-Vinyl Sulfone (PLGA-PEG-VS) is a heterobifunctional biodegradable block copolymer consisting of poly(lactic-co-glycolic acid) (PLGA), a hydrophilic polyethylene glycol (PEG) spacer, and a terminal vinyl sulfone (VS) functional group.
The hydrophobic PLGA block provides a biodegradable polymer domain suitable for forming polymeric nanoparticles, micelles, and other self-assembled nanostructures. The PEG segment improves aqueous dispersibility and colloidal stability while presenting the reactive vinyl sulfone group at the surface of the resulting nanocarrier.
Vinyl sulfone is an electrophilic functional group that reacts efficiently with thiols (–SH) through Michael-type addition to form stable thioether bonds. This chemistry is particularly useful for conjugating cysteine-containing peptides, proteins, antibodies, targeting ligands, and other thiolated molecules.
PLGA-PEG-VS provides an alternative to maleimide-functionalized PLGA-PEG for thiol conjugation. The vinyl sulfone group offers good stability and controlled thiol reactivity, making the polymer useful for preparing ligand-functionalized nanoparticles, polymer-bioconjugates, targeted drug delivery systems, and advanced biomaterials.
The molecular weight of the PLGA and PEG blocks and the lactide ratio can be customized to meet specific formulation and research requirements.
Applications
- Polymeric nanoparticle preparation
- Polymeric micelle formation
- Thiol-selective bioconjugation
- Cysteine-selective conjugation
- Protein and peptide conjugation
- Antibody conjugation
- Targeting ligand attachment
- Nanoparticle surface functionalization
- Targeted drug delivery
- Biomaterials research
Features and Benefits
- Biodegradable PLGA block
- Hydrophilic PEG spacer
- Terminal vinyl sulfone functionality
- Thiol-reactive functional group
- Stable thioether bond formation
- Suitable for cysteine-containing biomolecules
- Self-assembly into nanoparticles and micelles
- Tunable PLGA and PEG molecular weights
- Tunable lactide ratio
- Custom compositions available
