DSG-PEG2000-APRPG

DSG-PEG2000-APRPG is composed of three covalently linked components: 1. DSG (distearoylglycerol) : Lipid anchoring group-a diacylglycerol with two saturated C18 chains; provides strong membrane rigidity and sustained nanoparticle stability, suitable for applications requiring prolonged circulation time. 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. APRPG peptide: Targeting/functional ligand-APRPG peptide is a tumor angiogenesis-targeting peptide that selectively binds to tumor vascular endothelial cells, achieving tumor-vascularized targeted delivery.

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