DSPC:DSPE-mPEG2000 liposomes are often utilized in the delivery of drugs and therapeutic nucleic acids specifically targeting cancer cells. They are designed to enhance the efficacy and reduce systemic toxicity associated with conventional chemotherapy methods. Their stealth characteristics also improve the longevity and accumulation of therapeutic agents at disease sites.
The DSPE-mPEG2000 component in the liposomes contributes stealth properties by extending their circulation time in the bloodstream. This extended presence allows for better accumulation of the liposomes at targeted disease sites, enhancing the overall efficacy of the diagnostic or therapeutic agents they carry.
These liposomes can be synthesized through standard methods such as thin-film hydration followed by extrusion. This ensures uniform size distribution and optimal encapsulation efficiency, which are critical for their effectiveness as delivery systems.
By incorporating targeting ligands or antibodies on their surface, DSPC:DSPE-mPEG2000 liposomes can selectively target cancer cells. This targeted delivery system allows for higher concentrations of anticancer drugs at the tumor site with reduced side effects, increasing the therapeutic index.
The specific lipid composition of DSPC and DSPE-mPEG2000 provides a stable bilayer structure that is crucial for encapsulating and effectively delivering therapeutic agents. The mPEG2000 component enhances the biocompatibility and reduces the immune recognition of the liposomes.
Effect of DcNP vehicle on rate and total uptake of venetoclax (A-C) and zanubrutinib (D-F) into leukemic cells.
This study evaluated the treatment efficacy of venetoclax (Bcl-2 target) and zanubrutinib (BTK target) liposomes in leukemia. Researchers constructed VZ-DCNPs by encapsulating venetoclax and zanubrutinib in DSPC:DSPE-mPEG2000 liposomes. The absorption of free drugs and VZ-DCNPs was studied in three leukemia cells that expressed BTK and Bcl-2 (HL-60 cells), BTK only (K-562 cells), and Bcl-2 only (MOLT-4 cells). The results demonstrated that VZ-DCNPs improved both drugs' absorption in leukemia cells as compared to free drugs, with HL-60 cells demonstrating the greatest absorption. This study highlights the possibility of DSPC:DSPE-mPEG2000 liposomes for combination treatment.
Griffin, James, et al. "Design and Characterization of a Novel Venetoclax-Zanubrutinib Nano-Combination for Enhancing Leukemic Cell Uptake and Long-Acting Plasma Exposure." Pharmaceutics. 15.3 (2023): 1016. Under Open Access license CC BY 4.0, without modification.
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