摘要:
This invention provides compositions and methods for enhancing delivery of drugs and other agents across epithelial tissues, including the skin, gastrointestinal tract, pulmonary epithelium, ocular tissues and the like. The compositions and methods are also useful for delivery across endothelial tissues, including the blood brain barrier. The compositions and methods employ a delivery enhancing transporter that has sufficient guanidino or amidino sidechain moieties to enhance delivery of a compound conjugated to the reagent across one or more layers of the tissue, compared to the non-conjugated compound. The delivery-enhancing polymers include, for example, poly-arginine molecules that are preferably between about 6 and 25 residues in length.
摘要:
Methods and compositions for transporting drugs and macromolecules across biological membranes are disclosed. In one embodiment, the invention pertains to a method for enhancing transport of a selected compound across a biological membrane, wherein a biological membrane is contacted with a conjugate containing a biologically active agent that is covalently attached to a transport polymer. In a preferred embodiment, the polymer consists of from 6 to 25 subunits, at least 50% of which contain a guanidino or amidino sidechain moiety. The polymer is effective to impart to the attached agent a rate of trans-membrane transport across a biological membrane that is greater than the rate of trans-membrane transport of the agent in non-conjugated form.
摘要:
A cyclic carbonate monomer, including: wherein R1, R2, and R3 are independently selected from the group consisting of H, linear or branched, substituted or unsubstituted alkyl; R10 is a connecting group selected from the group consisting of linear or branched, substituted or unsubstituted alkyl, heteroalkyl, cycloalkyl, heterocyclic, aryl and heteroaryl; R4 is an optional bridging group selected from the group consisting of linear or branched, substituted or unsubstituted alkyl, heteroalkyl, cycloalkyl, heterocyclic, aryl and heteroaryl; Z is selected from the group consisting of O, NH, NR, and S; G is a guanidine group; and P is a protecting group. The cylic carbonate monomer can be reacted with an initiator including a drug, drug candidate, probe or other molecule of interest to form an oligomer with the molecule of interest attached to one end of a carbonate backbone and guanidine groups attached to the carbonate backbone.
摘要:
A cyclic carbonate monomer, including: wherein R1, R2, and R3 are independently selected from the group consisting of H, linear or branched, substituted or unsubstituted alkyl; R10 is a connecting group selected from the group consisting of linear or branched, substituted or unsubstituted alkyl, heteroalkyl, cycloalkyl, heterocyclic, aryl and heteroaryl; R4 is an optional bridging group selected from the group consisting of linear or branched, substituted or unsubstituted alkyl, heteroalkyl, cycloalkyl, heterocyclic, aryl and heteroaryl; Z is selected from the group consisting of O, NH, NR, and S; G is a guanidine group; and P is a protecting group.The cylic carbonate monomer can be reacted with an initiator including a drug, drug candidate, probe or other molecule of interest to form an oligomer with the molecule of interest attached to one end of a carbonate backbone and guanidine groups attached to the carbonate backbone.
摘要:
Synthesis routes that can be adapted to large scale synthesis of oligoguanidine compounds such as oligoarginine compounds are described which use a perguanidinylation step to convert a group of ω-amino groups to the corresponding guanidinyl groups. These compounds find utility as transport agents. Modified oligoguanidine compounds are also described.
摘要:
Co-oligomer compounds, complexes of the same with polyanions, such as siRNAs, and methods for using the same are provided. the delivery of polynucleotides, into a cell. The subject co-oligomers include at least a liphopilic monomer and at least a hydrophilic monomer (e.g., a guanidinium containing monomer). In some embodiments, the co-oligomer compounds are capable of complexing a siRNA of interest, thereby increasing the cell permeability of the siRNA, prior to release of the siRNA into the cell. In some embodiments, the subject method is a method of delivery a siRNA into a cell. In some embodiments, the subject method is a method of reducing expression of a protein target of a siRNA of interest. The subject co-oligomer/siRNA complexes may be formulated and administered to a subject to treat a condition resulting from expression of a protein target of the siRNA of interest.
摘要:
Many cancer therapeutic agents elicit resistance that renders them ineffective and often produces cross resistance to other drugs. One of the most common mechanisms of resistance involves P-glycoprotein (Pgp) mediated drug efflux. Here we provide compositions and methods that restore the efficacy of a therapeutic agent reduced by resistance by conjugation of the same agent to an oligoarginine transporter comprising from about 5 to about 25 guanidino or amidino moieties. We specifically show that the widely used chemotherapeutic agent taxol, ineffective against taxol-resistant human ovarian cancer cell lines, can be incorporated into an octaarginine conjugate that is effective against the same taxol-resistant cell lines. Significantly, the ability of the taxol conjugates to overcome taxol resistance is observed both in cell culture and in animal models of ovarian cancer. The generality and mechanistic basis for this effect were also explored with other Pgp substrate. This approach shows generality for overcoming the multidrug resistance elicited by small molecule cancer chemotherapeutics and could improve the prognosis for many cancer patients and fundamentally alter search strategies for novel therapeutic agents effective against resistant disease.
摘要:
Co-oligomer compounds, complexes of the same with polyanions, such as siRNAs, and methods for using the same are provided. the delivery of polynucleotides, into a cell. The subject co-oligomers include at least a liphopilic monomer and at least a hydrophilic monomer (e.g., a guanidinium containing monomer). In some embodiments, the co-oligomer compounds are capable of complexing a siRNA of interest, thereby increasing the cell permeability of the siRNA, prior to release of the siRNA into the cell. In some embodiments, the subject method is a method of delivery a siRNA into a cell. In some embodiments, the subject method is a method of reducing expression of a protein target of a siRNA of interest. The subject co-oligomer/siRNA complexes may be formulated and administered to a subject to treat a condition resulting from expression of a protein target of the siRNA of interest.
摘要:
Biologically active compounds related to the bryostatin family of compounds, having simplified spacer domains and/or improved recognition domains are disclosed, including methods of preparing and utilizing the same.
摘要:
This invention provides compositions and methods for enhancing delivery of drugs and other agents across epithelial tissues, including into and across ocular tissues and the like. The compositions and methods are also useful for delivery across endothelial tissues, including the blood brain barrier. The compositions and methods employ a delivery enhancing transporter that has sufficient guanidino or amidino sidechain moieties to enhance delivery of a compound conjugated to the reagent across one or more layers of the tissue, compared to the non-conjugated compound. The delivery-enhancing polymers include, for example, poly-arginine molecules that are preferably between about 6 and 25 residues in length.