Silver-containing compositions, devices, and methods for making
View Patent ↗The present invention comprises methods and compositions for making a silver-containing antimicrobial hydrophilic material. More particularly, the present invention comprises methods and compositions for stabilized silver antimicrobial devices comprising a matrix comprising a polymer network and a non-gellable polysaccharide, and an active agent. The matrix may be formed into any desired shape for its desired uses.
1. A method for administering at least one active agent to tissue comprising applying a biocompatible hydrophilic polymeric matrix to tissue, wherein the biocompatible hydrophilic polymeric matrix comprises a hydrophilic cross-linked polymer network, and a metal colloid directly incorporated in the matrix, wherein the metal colloid is formed by the direct reaction of an anion and a metal cation, and wherein the anion is in an excess concentration of the metal cations, such that association of the metal cation and the anion is favored; and at least one active agent.
2. The method of claim 1 , wherein the anion and the metal cation are provided organic solvents.
3. The method of claim 1 , wherein the metal cation is silver.
4. The method of claim 1 , wherein the metal colloid is a silver chloride colloid.
5. The method of claim 1 , wherein the active agent is antimicrobial agents, antifungal agents, antibacterial agents, anti-viral agents, antiparasitic agents, anaesthetics, mucopolysaccharides, growth factors, proteins, angiogenic factors, wound healing agents or adjuvants.
6. The method of claim 5 , wherein the antimicrobial agents are isoniazid, ethambutol, pyrazinamide, streptomycin, clofazimine, rifabutin, fluoroquinolones, ofloxacin, sparfloxacin, rifampin, azithromycin, clarithromycin, dapsone, tetracycline, erythromycin, ciprofloxacin, doxycycline, ampicillin, amphotencin B, ketoconazole, fluconazole, pyrimethamine, sulfadiazine, clindamycin, lincomycin, pentamidine, atovaquone, paromomycin, diclazaril, acyclovir, trifluorouridine, foscarnet, penicillin, gentamicin, ganciclovir, iatroconazole, miconazole, Zn-pyrithione, bromide, iodide or periodate.
7. The method of claim 5 , wherein the growth factors are basic fibroblast growth factor, acidic fibroblast growth factor, nerve growth factor, epidermal growth factor, insulin-like growth factors 1 and 2, platelet derived growth factor, tumor angiogenesis factor, vascular endothelial growth factor, corticotropin releasing factor, transforming growth factors a and 13, interleukin-8, granulocyte-macrophage colony stimulating factor, interleukins, or interferons.
8. The method of claim 5 , wherein the mucopolysaccharides are heparin, heparin sulfate, heparinoids, dermatan sulfate, pentosan polysulfate, chondroitin sulfate, hyaluronic acid, cellulose, agarose, chitin, dextran, carrageenin, linoleic acid, or allantoin.
9. The method of claim 5 , wherein the proteins are collagen, cross-linked collagen, fibronectin, laminin, elastin, cross-linked elastin, antibodies, or combination or fragments thereof.