Drug delivery systems
First Claim
1. A macromolecular complex of a therapeutically effective amount of a therapeutic substance and a biologically acceptable polymer, covalently chemically bonded thereto through the intermediary of a photolabile covalent chemical bond, said complex being effectively therapeutically inert and biologically acceptable for administration to a mammal, the complex being capable upon incidence of radiation of appropriately chosen characteristics to release the therapeutic substance therefrom in a therapeutically active form.
1 Assignment
0 Petitions
Accused Products
Abstract
A photoactivatable drug delivery system is provided, in which a drug is combined e.g. by covalent bonding, incorporation in a matrix or encapsulation, with a photosensitive macromolecule. In combination, the drug is inert. The macromolecule is large enough to prevent migration of the combination within the body, so that the combination can be implanted at a location of maximum effectiveness. The drug is released from the combination, in therapeutically active form, upon appropriate irradiation.
126 Citations
24 Claims
- 1. A macromolecular complex of a therapeutically effective amount of a therapeutic substance and a biologically acceptable polymer, covalently chemically bonded thereto through the intermediary of a photolabile covalent chemical bond, said complex being effectively therapeutically inert and biologically acceptable for administration to a mammal, the complex being capable upon incidence of radiation of appropriately chosen characteristics to release the therapeutic substance therefrom in a therapeutically active form.
- 18. A macromolelcular complex of a therapeutically effective amount of a therapeutic substance and a biologically acceptable polymer, the therapeutic substance and a biologically acceptable polymer, the therapeutic substance being diffused into a hydrogel of the biologically acceptable polymer, the hydrogel being susceptible to dimensional change upon exposure to light of appropriate wavelength, to release the therapeutic substance therefrom during such exposure.
Specification