Description
DSPE-PEG-Maleimide (DSPE-PEG-MAL)
DSPE-PEG-Maleimide (DSPE-PEG-MAL) is a linear heterobifunctional PEGylation reagent composed of a hydrophobic DSPE phospholipid and a hydrophilic polyethylene glycol (PEG) chain terminated with a maleimide functional group.
This amphiphilic structure enables self-assembly into liposomes and micelles, making it a versatile building block for nanocarrier formulation.
The DSPE lipid segment anchors into lipid bilayers, while the PEG chain enhances colloidal stability, aqueous solubility, and biocompatibility. The terminal maleimide group selectively reacts with thiol or cysteine residues, enabling efficient bioconjugation of targeting ligands.
Key Applications
DSPE-PEG-MAL is widely used in:
- PEGylated liposome and micelle formulation
- Targeted drug delivery systems
- Nanoparticle surface modification
- Bioconjugation of antibodies, peptides, proteins, and aptamers
- Long-circulating (“stealth”) nanocarrier design
Functional Advantages
- Self-assembling amphiphilic structure
- Improves drug solubility and stability
- Extends circulation half-life via PEG shielding
- Reduces protein adsorption and immune recognition
- Highly selective thiol-reactive maleimide group for conjugation
Summary
DSPE-PEG-MAL is a multifunctional lipid–PEG conjugate that enables the construction of stable, long-circulating, and actively targetable nanocarriers for advanced drug delivery applications.
