DMG-PEG2000-CGKRK

DMG-PEG2000-CGKRK is composed of three covalently linked components: 1. DMG (dimyristoylglycerol): Lipid anchoring group-a diacylglycerol with two C14 chains, providing moderate membrane anchorage; its short-chain, high-fluidity characteristics enable faster dissociation of PEG-lipids from nanoparticle surfaces, facilitating endosomal escape and cellular uptake. 2. PEG 2000 (polyethylene glycol, molecular weight 2000): Hydrophilic polymer spacer arm-forms a steric hindrance crown around nanoparticles, reducing opsonin activity and reticuloendothelial system (RES) clearance, prolonging circulating half-life, and providing steric separation between the lipid surface and the targeting ligand. 3. CGKRK peptide: Targeting/functional ligand-CGKRK peptide is a tumor angiogenesis-targeting peptide rich in basic amino acids that specifically binds to heparan sulfate on the surface of tumor vascular endothelial cells, achieving dual targeting of tumor cells and tumor angiogenesis.

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