摘要:
The present invention is directed compositions for delivery of RNA interference (RNAi) polynucleotides to cells in vivo. The compositions comprise amphipathic membrane active polyamines reversibly modified with enzyme cleavable dipeptide-amidobenzyl-carbonate masking agents. Modification masks membrane activity of the polymer while reversibility provides physiological responsiveness. The reversibly modified polyamines (dynamic polyconjugate or DPC) are further covalently linked to an RNAi polynucleotide or co-administered with a targeted RNAi polynucleotide-targeting molecule conjugate.
摘要:
We describe pH-sensitive endosomolytic polymers, delivery particles containing pH-sensitive endosomolytic polymers. The described particles are capable of delivering polynucleotides to cells from the peripheral circulation with subsequent release from endosomes. The endosomolytic polymers are inactive outside the cell but disrupt membranes upon exposure to an acidified endosomal compartment.
摘要:
Polyampholyte are able to condense nucleic acid to form small complexes which can be utilized in the delivery of nucleic acid to mammalian cells. The polyampholytes can be formed prior to interaction with nucleic acid or they can be formed in the presence of nucleic acid. Stabilized polycation/nucleic acid complexes can be modified to reduce the positive charge of the polycation and add targeting ligands without destabilizing the complex. The resultant particles retain their small size and are more effective in delivery of nucleic acid to cells in vivo.
摘要:
Polyampholyte are able to condense nucleic acid to form small complexes which can be utilized in the delivery of nucleic acid to mammalian cells. The polyampholytes can be formed prior to interaction with nucleic acid or they can be formed in the presence of nucleic acid. Stabilized polycation/nucleic acid complexes can be modified to reduce the positive charge of the polycation and add targeting ligands without destabilizing the complex. The resultant particles retain their small size and are more effective in delivery of nucleic acid to cells in vivo.
摘要:
An process for the reversible modification of an amine-containing compound is described. Modification of the compound can be used to facilitate delivery of molecules to cells in vitro and in vivo or to alter interactions or activities the compounds. The described modifiers can also be utilized as cross-linkers.
摘要:
An process for the reversible modification of membrane interaction of a compound is described. Modification of membrane interaction can be used to facilitate delivery of molecules to cells in vitro and in vivo. The described modifiers, which are used to reversibly inactivate the membrane active compounds, can also be utilized as cross-linkers or to reverse the charge of a molecule.
摘要:
We describe compounds that bind to and are internalized by hepatocytes. Association of these compounds to other molecules or complexes can be used to target the molecules or complexes to hepatocytes in vivo or in vitro.
摘要:
Described are ortho carboxy phenol derived acetals and compositions containing ortho carboxy phenol derived acetals which are useful for delivering biologically active compounds to cells. The acetals can be used to reversibly link up to three different molecules and have rapid hydrolysis kinetics in conditions which are present in a cell as well as in vivo. Cleavage of the acetal enhances delivery of the biologically active compound.
摘要:
We describe a class of polymaleic anhydride polymers capable of disrupting cell membranes. Co-delivery of these polymers with biologically active compounds increases cellular cytoplasmic delivery of the compounds.
摘要:
We describe pH-sensitive endosomolytic polymers, delivery particles containing pH-sensitive endosomolytic polymers. The described particles are capable of delivering polynucleotides to cells from the peripheral circulation with subsequent release from endosomes. The endosomolytic polymers are inactive outside the cell but disrupt membranes upon exposure to an acidified endosomal compartment.