Abstract
Nanomedicines promise to extend drug therapy from small molecular compounds to proteins/nucleic acids/genes. Multifunctional envelope-type nanodevices (MENDs) have been developed for delivering such molecules to the site of action. The YSK-MEND contains new types of pH-responsive cationic lipids to efficiently deliver siRNA to hepatocytes via receptor-mediated endocytosis and use in treating hepatitis C and B in model mice. The RGD ligand is introduced to target tumor endothelial cells (TEC) and RGD-MEND is able to send siRNA to TEC to regulate the function of tumor microenvironments. The MITO-Porter is also developed to target mitochondria via membrane fusion. Antisense oligo RNA in the MITO-Porter permits the knock down of mitochondrial function. Finally, the ssPalms is designed based on a new concept of pH-dependent protonation in endosomes and cleavage of SS bonds in the reducing conditions in cytosol. These new technologies promise to stimulate the use of Nanomedicines in the future.
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